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feat: npm安装mysql2包

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luozhj33 2026-03-17 20:52:46 +08:00
parent 19fac0bf32
commit 9ccd1c7d88
322 changed files with 85784 additions and 0 deletions
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4
.vscode/settings.json vendored Normal file
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@ -0,0 +1,4 @@
{
"python-envs.defaultEnvManager": "ms-python.python:conda",
"python-envs.defaultPackageManager": "ms-python.python:conda"
}

120
back/node_modules/.package-lock.json generated vendored
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@ -72,6 +72,16 @@
"@redis/client": "^5.11.0"
}
},
"node_modules/@types/node": {
"version": "25.5.0",
"resolved": "https://registry.npmmirror.com/@types/node/-/node-25.5.0.tgz",
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"license": "MIT",
"peer": true,
"dependencies": {
"undici-types": "~7.18.0"
}
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"node_modules/accepts": {
"version": "2.0.0",
"resolved": "https://registry.npmmirror.com/accepts/-/accepts-2.0.0.tgz",
@ -85,6 +95,15 @@
"node": ">= 0.6"
}
},
"node_modules/aws-ssl-profiles": {
"version": "1.1.2",
"resolved": "https://registry.npmmirror.com/aws-ssl-profiles/-/aws-ssl-profiles-1.1.2.tgz",
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"license": "MIT",
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@ -219,6 +238,15 @@
}
}
},
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"license": "Apache-2.0",
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"version": "2.0.0",
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@ -402,6 +430,15 @@
"url": "https://github.com/sponsors/ljharb"
}
},
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"license": "MIT",
"dependencies": {
"is-property": "^1.0.2"
}
},
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"version": "1.3.0",
"resolved": "https://registry.npmmirror.com/get-intrinsic/-/get-intrinsic-1.3.0.tgz",
@ -532,6 +569,12 @@
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"license": "MIT"
},
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"resolved": "https://registry.npmmirror.com/is-property/-/is-property-1.0.2.tgz",
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"license": "MIT"
},
"node_modules/jsonwebtoken": {
"version": "9.0.3",
"resolved": "https://registry.npmmirror.com/jsonwebtoken/-/jsonwebtoken-9.0.3.tgz",
@ -617,6 +660,27 @@
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"license": "MIT"
},
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"version": "5.3.2",
"resolved": "https://registry.npmmirror.com/long/-/long-5.3.2.tgz",
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"license": "Apache-2.0"
},
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"version": "1.1.4",
"resolved": "https://registry.npmmirror.com/lru.min/-/lru.min-1.1.4.tgz",
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"license": "MIT",
"engines": {
"bun": ">=1.0.0",
"deno": ">=1.30.0",
"node": ">=8.0.0"
},
"funding": {
"type": "github",
"url": "https://github.com/sponsors/wellwelwel"
}
},
"node_modules/math-intrinsics": {
"version": "1.1.0",
"resolved": "https://registry.npmmirror.com/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@ -678,6 +742,40 @@
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"license": "MIT"
},
"node_modules/mysql2": {
"version": "3.20.0",
"resolved": "https://registry.npmmirror.com/mysql2/-/mysql2-3.20.0.tgz",
"integrity": "sha512-eCLUs7BNbgA6nf/MZXsaBO1SfGs0LtLVrJD3WeWq+jPLDWkSufTD+aGMwykfUVPdZnblaUK1a8G/P63cl9FkKg==",
"license": "MIT",
"dependencies": {
"aws-ssl-profiles": "^1.1.2",
"denque": "^2.1.0",
"generate-function": "^2.3.1",
"iconv-lite": "^0.7.2",
"long": "^5.3.2",
"lru.min": "^1.1.4",
"named-placeholders": "^1.1.6",
"sql-escaper": "^1.3.3"
},
"engines": {
"node": ">= 8.0"
},
"peerDependencies": {
"@types/node": ">= 8"
}
},
"node_modules/named-placeholders": {
"version": "1.1.6",
"resolved": "https://registry.npmmirror.com/named-placeholders/-/named-placeholders-1.1.6.tgz",
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"license": "MIT",
"dependencies": {
"lru.min": "^1.1.0"
},
"engines": {
"node": ">=8.0.0"
}
},
"node_modules/negotiator": {
"version": "1.0.0",
"resolved": "https://registry.npmmirror.com/negotiator/-/negotiator-1.0.0.tgz",
@ -984,6 +1082,21 @@
"url": "https://github.com/sponsors/ljharb"
}
},
"node_modules/sql-escaper": {
"version": "1.3.3",
"resolved": "https://registry.npmmirror.com/sql-escaper/-/sql-escaper-1.3.3.tgz",
"integrity": "sha512-BsTCV265VpTp8tm1wyIm1xqQCS+Q9NHx2Sr+WcnUrgLrQ6yiDIvHYJV5gHxsj1lMBy2zm5twLaZao8Jd+S8JJw==",
"license": "MIT",
"engines": {
"bun": ">=1.0.0",
"deno": ">=2.0.0",
"node": ">=12.0.0"
},
"funding": {
"type": "github",
"url": "https://github.com/mysqljs/sql-escaper?sponsor=1"
}
},
"node_modules/statuses": {
"version": "2.0.2",
"resolved": "https://registry.npmmirror.com/statuses/-/statuses-2.0.2.tgz",
@ -1016,6 +1129,13 @@
"node": ">= 0.6"
}
},
"node_modules/undici-types": {
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"license": "MIT",
"peer": true
},
"node_modules/unpipe": {
"version": "1.0.0",
"resolved": "https://registry.npmmirror.com/unpipe/-/unpipe-1.0.0.tgz",

21
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@ -0,0 +1,21 @@
MIT License
Copyright (c) Microsoft Corporation.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE

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back/node_modules/@types/node/README.md generated vendored Normal file
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# Installation
> `npm install --save @types/node`
# Summary
This package contains type definitions for node (https://nodejs.org/).
# Details
Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/node.
### Additional Details
* Last updated: Thu, 12 Mar 2026 15:47:58 GMT
* Dependencies: [undici-types](https://npmjs.com/package/undici-types)
# Credits
These definitions were written by [Microsoft TypeScript](https://github.com/Microsoft), [Alberto Schiabel](https://github.com/jkomyno), [Andrew Makarov](https://github.com/r3nya), [Benjamin Toueg](https://github.com/btoueg), [David Junger](https://github.com/touffy), [Mohsen Azimi](https://github.com/mohsen1), [Nikita Galkin](https://github.com/galkin), [Sebastian Silbermann](https://github.com/eps1lon), [Wilco Bakker](https://github.com/WilcoBakker), [Marcin Kopacz](https://github.com/chyzwar), [Trivikram Kamat](https://github.com/trivikr), [Junxiao Shi](https://github.com/yoursunny), [Ilia Baryshnikov](https://github.com/qwelias), [ExE Boss](https://github.com/ExE-Boss), [Piotr Błażejewicz](https://github.com/peterblazejewicz), [Anna Henningsen](https://github.com/addaleax), [Victor Perin](https://github.com/victorperin), [NodeJS Contributors](https://github.com/NodeJS), [Linus Unnebäck](https://github.com/LinusU), [wafuwafu13](https://github.com/wafuwafu13), [Matteo Collina](https://github.com/mcollina), [Dmitry Semigradsky](https://github.com/Semigradsky), [René](https://github.com/Renegade334), and [Yagiz Nizipli](https://github.com/anonrig).

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back/node_modules/@types/node/assert.d.ts generated vendored Normal file
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/**
* The `node:assert` module provides a set of assertion functions for verifying
* invariants.
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/assert.js)
*/
declare module "node:assert" {
import strict = require("node:assert/strict");
/**
* An alias of {@link assert.ok}.
* @since v0.5.9
* @param value The input that is checked for being truthy.
*/
function assert(value: unknown, message?: string | Error): asserts value;
const kOptions: unique symbol;
namespace assert {
type AssertMethodNames =
| "deepEqual"
| "deepStrictEqual"
| "doesNotMatch"
| "doesNotReject"
| "doesNotThrow"
| "equal"
| "fail"
| "ifError"
| "match"
| "notDeepEqual"
| "notDeepStrictEqual"
| "notEqual"
| "notStrictEqual"
| "ok"
| "partialDeepStrictEqual"
| "rejects"
| "strictEqual"
| "throws";
interface AssertOptions {
/**
* If set to `'full'`, shows the full diff in assertion errors.
* @default 'simple'
*/
diff?: "simple" | "full" | undefined;
/**
* If set to `true`, non-strict methods behave like their
* corresponding strict methods.
* @default true
*/
strict?: boolean | undefined;
/**
* If set to `true`, skips prototype and constructor
* comparison in deep equality checks.
* @since v24.9.0
* @default false
*/
skipPrototype?: boolean | undefined;
}
interface Assert extends Pick<typeof assert, AssertMethodNames> {
readonly [kOptions]: AssertOptions & { strict: false };
}
interface AssertStrict extends Pick<typeof strict, AssertMethodNames> {
readonly [kOptions]: AssertOptions & { strict: true };
}
/**
* The `Assert` class allows creating independent assertion instances with custom options.
* @since v24.6.0
*/
var Assert: {
/**
* Creates a new assertion instance. The `diff` option controls the verbosity of diffs in assertion error messages.
*
* ```js
* const { Assert } = require('node:assert');
* const assertInstance = new Assert({ diff: 'full' });
* assertInstance.deepStrictEqual({ a: 1 }, { a: 2 });
* // Shows a full diff in the error message.
* ```
*
* **Important**: When destructuring assertion methods from an `Assert` instance,
* the methods lose their connection to the instance's configuration options (such
* as `diff`, `strict`, and `skipPrototype` settings).
* The destructured methods will fall back to default behavior instead.
*
* ```js
* const myAssert = new Assert({ diff: 'full' });
*
* // This works as expected - uses 'full' diff
* myAssert.strictEqual({ a: 1 }, { b: { c: 1 } });
*
* // This loses the 'full' diff setting - falls back to default 'simple' diff
* const { strictEqual } = myAssert;
* strictEqual({ a: 1 }, { b: { c: 1 } });
* ```
*
* The `skipPrototype` option affects all deep equality methods:
*
* ```js
* class Foo {
* constructor(a) {
* this.a = a;
* }
* }
*
* class Bar {
* constructor(a) {
* this.a = a;
* }
* }
*
* const foo = new Foo(1);
* const bar = new Bar(1);
*
* // Default behavior - fails due to different constructors
* const assert1 = new Assert();
* assert1.deepStrictEqual(foo, bar); // AssertionError
*
* // Skip prototype comparison - passes if properties are equal
* const assert2 = new Assert({ skipPrototype: true });
* assert2.deepStrictEqual(foo, bar); // OK
* ```
*
* When destructured, methods lose access to the instance's `this` context and revert to default assertion behavior
* (diff: 'simple', non-strict mode).
* To maintain custom options when using destructured methods, avoid
* destructuring and call methods directly on the instance.
* @since v24.6.0
*/
new(
options?: AssertOptions & { strict?: true | undefined },
): AssertStrict;
new(
options: AssertOptions,
): Assert;
};
interface AssertionErrorOptions {
/**
* If provided, the error message is set to this value.
*/
message?: string | undefined;
/**
* The `actual` property on the error instance.
*/
actual?: unknown;
/**
* The `expected` property on the error instance.
*/
expected?: unknown;
/**
* The `operator` property on the error instance.
*/
operator?: string | undefined;
/**
* If provided, the generated stack trace omits frames before this function.
*/
stackStartFn?: Function | undefined;
/**
* If set to `'full'`, shows the full diff in assertion errors.
* @default 'simple'
*/
diff?: "simple" | "full" | undefined;
}
/**
* Indicates the failure of an assertion. All errors thrown by the `node:assert` module will be instances of the `AssertionError` class.
*/
class AssertionError extends Error {
constructor(options: AssertionErrorOptions);
/**
* Set to the `actual` argument for methods such as {@link assert.strictEqual()}.
*/
actual: unknown;
/**
* Set to the `expected` argument for methods such as {@link assert.strictEqual()}.
*/
expected: unknown;
/**
* Indicates if the message was auto-generated (`true`) or not.
*/
generatedMessage: boolean;
/**
* Value is always `ERR_ASSERTION` to show that the error is an assertion error.
*/
code: "ERR_ASSERTION";
/**
* Set to the passed in operator value.
*/
operator: string;
}
type AssertPredicate = RegExp | (new() => object) | ((thrown: unknown) => boolean) | object | Error;
/**
* Throws an `AssertionError` with the provided error message or a default
* error message. If the `message` parameter is an instance of an `Error` then
* it will be thrown instead of the `AssertionError`.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.fail();
* // AssertionError [ERR_ASSERTION]: Failed
*
* assert.fail('boom');
* // AssertionError [ERR_ASSERTION]: boom
*
* assert.fail(new TypeError('need array'));
* // TypeError: need array
* ```
* @since v0.1.21
* @param [message='Failed']
*/
function fail(message?: string | Error): never;
/**
* Tests if `value` is truthy. It is equivalent to `assert.equal(!!value, true, message)`.
*
* If `value` is not truthy, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is `undefined`, a default
* error message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown instead of the `AssertionError`.
* If no arguments are passed in at all `message` will be set to the string:`` 'No value argument passed to `assert.ok()`' ``.
*
* Be aware that in the `repl` the error message will be different to the one
* thrown in a file! See below for further details.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.ok(true);
* // OK
* assert.ok(1);
* // OK
*
* assert.ok();
* // AssertionError: No value argument passed to `assert.ok()`
*
* assert.ok(false, 'it\'s false');
* // AssertionError: it's false
*
* // In the repl:
* assert.ok(typeof 123 === 'string');
* // AssertionError: false == true
*
* // In a file (e.g. test.js):
* assert.ok(typeof 123 === 'string');
* // AssertionError: The expression evaluated to a falsy value:
* //
* // assert.ok(typeof 123 === 'string')
*
* assert.ok(false);
* // AssertionError: The expression evaluated to a falsy value:
* //
* // assert.ok(false)
*
* assert.ok(0);
* // AssertionError: The expression evaluated to a falsy value:
* //
* // assert.ok(0)
* ```
*
* ```js
* import assert from 'node:assert/strict';
*
* // Using `assert()` works the same:
* assert(2 + 2 > 5);;
* // AssertionError: The expression evaluated to a falsy value:
* //
* // assert(2 + 2 > 5)
* ```
* @since v0.1.21
*/
function ok(value: unknown, message?: string | Error): asserts value;
/**
* **Strict assertion mode**
*
* An alias of {@link strictEqual}.
*
* **Legacy assertion mode**
*
* > Stability: 3 - Legacy: Use {@link strictEqual} instead.
*
* Tests shallow, coercive equality between the `actual` and `expected` parameters
* using the [`==` operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Equality). `NaN` is specially handled
* and treated as being identical if both sides are `NaN`.
*
* ```js
* import assert from 'node:assert';
*
* assert.equal(1, 1);
* // OK, 1 == 1
* assert.equal(1, '1');
* // OK, 1 == '1'
* assert.equal(NaN, NaN);
* // OK
*
* assert.equal(1, 2);
* // AssertionError: 1 == 2
* assert.equal({ a: { b: 1 } }, { a: { b: 1 } });
* // AssertionError: { a: { b: 1 } } == { a: { b: 1 } }
* ```
*
* If the values are not equal, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is undefined, a default
* error message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown instead of the `AssertionError`.
* @since v0.1.21
*/
function equal(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* **Strict assertion mode**
*
* An alias of {@link notStrictEqual}.
*
* **Legacy assertion mode**
*
* > Stability: 3 - Legacy: Use {@link notStrictEqual} instead.
*
* Tests shallow, coercive inequality with the [`!=` operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Inequality). `NaN` is
* specially handled and treated as being identical if both sides are `NaN`.
*
* ```js
* import assert from 'node:assert';
*
* assert.notEqual(1, 2);
* // OK
*
* assert.notEqual(1, 1);
* // AssertionError: 1 != 1
*
* assert.notEqual(1, '1');
* // AssertionError: 1 != '1'
* ```
*
* If the values are equal, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is undefined, a default error
* message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown instead of the `AssertionError`.
* @since v0.1.21
*/
function notEqual(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* **Strict assertion mode**
*
* An alias of {@link deepStrictEqual}.
*
* **Legacy assertion mode**
*
* > Stability: 3 - Legacy: Use {@link deepStrictEqual} instead.
*
* Tests for deep equality between the `actual` and `expected` parameters. Consider
* using {@link deepStrictEqual} instead. {@link deepEqual} can have
* surprising results.
*
* _Deep equality_ means that the enumerable "own" properties of child objects
* are also recursively evaluated by the following rules.
* @since v0.1.21
*/
function deepEqual(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* **Strict assertion mode**
*
* An alias of {@link notDeepStrictEqual}.
*
* **Legacy assertion mode**
*
* > Stability: 3 - Legacy: Use {@link notDeepStrictEqual} instead.
*
* Tests for any deep inequality. Opposite of {@link deepEqual}.
*
* ```js
* import assert from 'node:assert';
*
* const obj1 = {
* a: {
* b: 1,
* },
* };
* const obj2 = {
* a: {
* b: 2,
* },
* };
* const obj3 = {
* a: {
* b: 1,
* },
* };
* const obj4 = { __proto__: obj1 };
*
* assert.notDeepEqual(obj1, obj1);
* // AssertionError: { a: { b: 1 } } notDeepEqual { a: { b: 1 } }
*
* assert.notDeepEqual(obj1, obj2);
* // OK
*
* assert.notDeepEqual(obj1, obj3);
* // AssertionError: { a: { b: 1 } } notDeepEqual { a: { b: 1 } }
*
* assert.notDeepEqual(obj1, obj4);
* // OK
* ```
*
* If the values are deeply equal, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is undefined, a default
* error message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown
* instead of the `AssertionError`.
* @since v0.1.21
*/
function notDeepEqual(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* Tests strict equality between the `actual` and `expected` parameters as
* determined by [`Object.is()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is).
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.strictEqual(1, 2);
* // AssertionError [ERR_ASSERTION]: Expected inputs to be strictly equal:
* //
* // 1 !== 2
*
* assert.strictEqual(1, 1);
* // OK
*
* assert.strictEqual('Hello foobar', 'Hello World!');
* // AssertionError [ERR_ASSERTION]: Expected inputs to be strictly equal:
* // + actual - expected
* //
* // + 'Hello foobar'
* // - 'Hello World!'
* // ^
*
* const apples = 1;
* const oranges = 2;
* assert.strictEqual(apples, oranges, `apples ${apples} !== oranges ${oranges}`);
* // AssertionError [ERR_ASSERTION]: apples 1 !== oranges 2
*
* assert.strictEqual(1, '1', new TypeError('Inputs are not identical'));
* // TypeError: Inputs are not identical
* ```
*
* If the values are not strictly equal, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is undefined, a
* default error message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown
* instead of the `AssertionError`.
* @since v0.1.21
*/
function strictEqual<T>(actual: unknown, expected: T, message?: string | Error): asserts actual is T;
/**
* Tests strict inequality between the `actual` and `expected` parameters as
* determined by [`Object.is()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is).
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.notStrictEqual(1, 2);
* // OK
*
* assert.notStrictEqual(1, 1);
* // AssertionError [ERR_ASSERTION]: Expected "actual" to be strictly unequal to:
* //
* // 1
*
* assert.notStrictEqual(1, '1');
* // OK
* ```
*
* If the values are strictly equal, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is undefined, a
* default error message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown
* instead of the `AssertionError`.
* @since v0.1.21
*/
function notStrictEqual(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* Tests for deep equality between the `actual` and `expected` parameters.
* "Deep" equality means that the enumerable "own" properties of child objects
* are recursively evaluated also by the following rules.
* @since v1.2.0
*/
function deepStrictEqual<T>(actual: unknown, expected: T, message?: string | Error): asserts actual is T;
/**
* Tests for deep strict inequality. Opposite of {@link deepStrictEqual}.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.notDeepStrictEqual({ a: 1 }, { a: '1' });
* // OK
* ```
*
* If the values are deeply and strictly equal, an `AssertionError` is thrown
* with a `message` property set equal to the value of the `message` parameter. If
* the `message` parameter is undefined, a default error message is assigned. If
* the `message` parameter is an instance of an `Error` then it will be thrown
* instead of the `AssertionError`.
* @since v1.2.0
*/
function notDeepStrictEqual(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* Expects the function `fn` to throw an error.
*
* If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
* [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), a validation function,
* a validation object where each property will be tested for strict deep equality,
* or an instance of error where each property will be tested for strict deep
* equality including the non-enumerable `message` and `name` properties. When
* using an object, it is also possible to use a regular expression, when
* validating against a string property. See below for examples.
*
* If specified, `message` will be appended to the message provided by the `AssertionError` if the `fn` call fails to throw or in case the error validation
* fails.
*
* Custom validation object/error instance:
*
* ```js
* import assert from 'node:assert/strict';
*
* const err = new TypeError('Wrong value');
* err.code = 404;
* err.foo = 'bar';
* err.info = {
* nested: true,
* baz: 'text',
* };
* err.reg = /abc/i;
*
* assert.throws(
* () => {
* throw err;
* },
* {
* name: 'TypeError',
* message: 'Wrong value',
* info: {
* nested: true,
* baz: 'text',
* },
* // Only properties on the validation object will be tested for.
* // Using nested objects requires all properties to be present. Otherwise
* // the validation is going to fail.
* },
* );
*
* // Using regular expressions to validate error properties:
* assert.throws(
* () => {
* throw err;
* },
* {
* // The `name` and `message` properties are strings and using regular
* // expressions on those will match against the string. If they fail, an
* // error is thrown.
* name: /^TypeError$/,
* message: /Wrong/,
* foo: 'bar',
* info: {
* nested: true,
* // It is not possible to use regular expressions for nested properties!
* baz: 'text',
* },
* // The `reg` property contains a regular expression and only if the
* // validation object contains an identical regular expression, it is going
* // to pass.
* reg: /abc/i,
* },
* );
*
* // Fails due to the different `message` and `name` properties:
* assert.throws(
* () => {
* const otherErr = new Error('Not found');
* // Copy all enumerable properties from `err` to `otherErr`.
* for (const [key, value] of Object.entries(err)) {
* otherErr[key] = value;
* }
* throw otherErr;
* },
* // The error's `message` and `name` properties will also be checked when using
* // an error as validation object.
* err,
* );
* ```
*
* Validate instanceof using constructor:
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.throws(
* () => {
* throw new Error('Wrong value');
* },
* Error,
* );
* ```
*
* Validate error message using [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions):
*
* Using a regular expression runs `.toString` on the error object, and will
* therefore also include the error name.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.throws(
* () => {
* throw new Error('Wrong value');
* },
* /^Error: Wrong value$/,
* );
* ```
*
* Custom error validation:
*
* The function must return `true` to indicate all internal validations passed.
* It will otherwise fail with an `AssertionError`.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.throws(
* () => {
* throw new Error('Wrong value');
* },
* (err) => {
* assert(err instanceof Error);
* assert(/value/.test(err));
* // Avoid returning anything from validation functions besides `true`.
* // Otherwise, it's not clear what part of the validation failed. Instead,
* // throw an error about the specific validation that failed (as done in this
* // example) and add as much helpful debugging information to that error as
* // possible.
* return true;
* },
* 'unexpected error',
* );
* ```
*
* `error` cannot be a string. If a string is provided as the second
* argument, then `error` is assumed to be omitted and the string will be used for `message` instead. This can lead to easy-to-miss mistakes. Using the same
* message as the thrown error message is going to result in an `ERR_AMBIGUOUS_ARGUMENT` error. Please read the example below carefully if using
* a string as the second argument gets considered:
*
* ```js
* import assert from 'node:assert/strict';
*
* function throwingFirst() {
* throw new Error('First');
* }
*
* function throwingSecond() {
* throw new Error('Second');
* }
*
* function notThrowing() {}
*
* // The second argument is a string and the input function threw an Error.
* // The first case will not throw as it does not match for the error message
* // thrown by the input function!
* assert.throws(throwingFirst, 'Second');
* // In the next example the message has no benefit over the message from the
* // error and since it is not clear if the user intended to actually match
* // against the error message, Node.js throws an `ERR_AMBIGUOUS_ARGUMENT` error.
* assert.throws(throwingSecond, 'Second');
* // TypeError [ERR_AMBIGUOUS_ARGUMENT]
*
* // The string is only used (as message) in case the function does not throw:
* assert.throws(notThrowing, 'Second');
* // AssertionError [ERR_ASSERTION]: Missing expected exception: Second
*
* // If it was intended to match for the error message do this instead:
* // It does not throw because the error messages match.
* assert.throws(throwingSecond, /Second$/);
*
* // If the error message does not match, an AssertionError is thrown.
* assert.throws(throwingFirst, /Second$/);
* // AssertionError [ERR_ASSERTION]
* ```
*
* Due to the confusing error-prone notation, avoid a string as the second
* argument.
* @since v0.1.21
*/
function throws(block: () => unknown, message?: string | Error): void;
function throws(block: () => unknown, error: AssertPredicate, message?: string | Error): void;
/**
* Asserts that the function `fn` does not throw an error.
*
* Using `assert.doesNotThrow()` is actually not useful because there
* is no benefit in catching an error and then rethrowing it. Instead, consider
* adding a comment next to the specific code path that should not throw and keep
* error messages as expressive as possible.
*
* When `assert.doesNotThrow()` is called, it will immediately call the `fn` function.
*
* If an error is thrown and it is the same type as that specified by the `error` parameter, then an `AssertionError` is thrown. If the error is of a
* different type, or if the `error` parameter is undefined, the error is
* propagated back to the caller.
*
* If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
* [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), or a validation
* function. See {@link throws} for more details.
*
* The following, for instance, will throw the `TypeError` because there is no
* matching error type in the assertion:
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.doesNotThrow(
* () => {
* throw new TypeError('Wrong value');
* },
* SyntaxError,
* );
* ```
*
* However, the following will result in an `AssertionError` with the message
* 'Got unwanted exception...':
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.doesNotThrow(
* () => {
* throw new TypeError('Wrong value');
* },
* TypeError,
* );
* ```
*
* If an `AssertionError` is thrown and a value is provided for the `message` parameter, the value of `message` will be appended to the `AssertionError` message:
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.doesNotThrow(
* () => {
* throw new TypeError('Wrong value');
* },
* /Wrong value/,
* 'Whoops',
* );
* // Throws: AssertionError: Got unwanted exception: Whoops
* ```
* @since v0.1.21
*/
function doesNotThrow(block: () => unknown, message?: string | Error): void;
function doesNotThrow(block: () => unknown, error: AssertPredicate, message?: string | Error): void;
/**
* Throws `value` if `value` is not `undefined` or `null`. This is useful when
* testing the `error` argument in callbacks. The stack trace contains all frames
* from the error passed to `ifError()` including the potential new frames for `ifError()` itself.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.ifError(null);
* // OK
* assert.ifError(0);
* // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: 0
* assert.ifError('error');
* // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: 'error'
* assert.ifError(new Error());
* // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: Error
*
* // Create some random error frames.
* let err;
* (function errorFrame() {
* err = new Error('test error');
* })();
*
* (function ifErrorFrame() {
* assert.ifError(err);
* })();
* // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: test error
* // at ifErrorFrame
* // at errorFrame
* ```
* @since v0.1.97
*/
function ifError(value: unknown): asserts value is null | undefined;
/**
* Awaits the `asyncFn` promise or, if `asyncFn` is a function, immediately
* calls the function and awaits the returned promise to complete. It will then
* check that the promise is rejected.
*
* If `asyncFn` is a function and it throws an error synchronously, `assert.rejects()` will return a rejected `Promise` with that error. If the
* function does not return a promise, `assert.rejects()` will return a rejected `Promise` with an [ERR_INVALID_RETURN_VALUE](https://nodejs.org/docs/latest-v25.x/api/errors.html#err_invalid_return_value)
* error. In both cases the error handler is skipped.
*
* Besides the async nature to await the completion behaves identically to {@link throws}.
*
* If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
* [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), a validation function,
* an object where each property will be tested for, or an instance of error where
* each property will be tested for including the non-enumerable `message` and `name` properties.
*
* If specified, `message` will be the message provided by the `{@link AssertionError}` if the `asyncFn` fails to reject.
*
* ```js
* import assert from 'node:assert/strict';
*
* await assert.rejects(
* async () => {
* throw new TypeError('Wrong value');
* },
* {
* name: 'TypeError',
* message: 'Wrong value',
* },
* );
* ```
*
* ```js
* import assert from 'node:assert/strict';
*
* await assert.rejects(
* async () => {
* throw new TypeError('Wrong value');
* },
* (err) => {
* assert.strictEqual(err.name, 'TypeError');
* assert.strictEqual(err.message, 'Wrong value');
* return true;
* },
* );
* ```
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.rejects(
* Promise.reject(new Error('Wrong value')),
* Error,
* ).then(() => {
* // ...
* });
* ```
*
* `error` cannot be a string. If a string is provided as the second argument, then `error` is assumed to
* be omitted and the string will be used for `message` instead. This can lead to easy-to-miss mistakes. Please read the
* example in {@link throws} carefully if using a string as the second argument gets considered.
* @since v10.0.0
*/
function rejects(block: (() => Promise<unknown>) | Promise<unknown>, message?: string | Error): Promise<void>;
function rejects(
block: (() => Promise<unknown>) | Promise<unknown>,
error: AssertPredicate,
message?: string | Error,
): Promise<void>;
/**
* Awaits the `asyncFn` promise or, if `asyncFn` is a function, immediately
* calls the function and awaits the returned promise to complete. It will then
* check that the promise is not rejected.
*
* If `asyncFn` is a function and it throws an error synchronously, `assert.doesNotReject()` will return a rejected `Promise` with that error. If
* the function does not return a promise, `assert.doesNotReject()` will return a
* rejected `Promise` with an [ERR_INVALID_RETURN_VALUE](https://nodejs.org/docs/latest-v25.x/api/errors.html#err_invalid_return_value) error. In both cases
* the error handler is skipped.
*
* Using `assert.doesNotReject()` is actually not useful because there is little
* benefit in catching a rejection and then rejecting it again. Instead, consider
* adding a comment next to the specific code path that should not reject and keep
* error messages as expressive as possible.
*
* If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
* [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), or a validation
* function. See {@link throws} for more details.
*
* Besides the async nature to await the completion behaves identically to {@link doesNotThrow}.
*
* ```js
* import assert from 'node:assert/strict';
*
* await assert.doesNotReject(
* async () => {
* throw new TypeError('Wrong value');
* },
* SyntaxError,
* );
* ```
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.doesNotReject(Promise.reject(new TypeError('Wrong value')))
* .then(() => {
* // ...
* });
* ```
* @since v10.0.0
*/
function doesNotReject(
block: (() => Promise<unknown>) | Promise<unknown>,
message?: string | Error,
): Promise<void>;
function doesNotReject(
block: (() => Promise<unknown>) | Promise<unknown>,
error: AssertPredicate,
message?: string | Error,
): Promise<void>;
/**
* Expects the `string` input to match the regular expression.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.match('I will fail', /pass/);
* // AssertionError [ERR_ASSERTION]: The input did not match the regular ...
*
* assert.match(123, /pass/);
* // AssertionError [ERR_ASSERTION]: The "string" argument must be of type string.
*
* assert.match('I will pass', /pass/);
* // OK
* ```
*
* If the values do not match, or if the `string` argument is of another type than `string`, an `{@link AssertionError}` is thrown with a `message` property set equal
* to the value of the `message` parameter. If the `message` parameter is
* undefined, a default error message is assigned. If the `message` parameter is an
* instance of an [Error](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-error) then it will be thrown instead of the `{@link AssertionError}`.
* @since v13.6.0, v12.16.0
*/
function match(value: string, regExp: RegExp, message?: string | Error): void;
/**
* Expects the `string` input not to match the regular expression.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.doesNotMatch('I will fail', /fail/);
* // AssertionError [ERR_ASSERTION]: The input was expected to not match the ...
*
* assert.doesNotMatch(123, /pass/);
* // AssertionError [ERR_ASSERTION]: The "string" argument must be of type string.
*
* assert.doesNotMatch('I will pass', /different/);
* // OK
* ```
*
* If the values do match, or if the `string` argument is of another type than `string`, an `{@link AssertionError}` is thrown with a `message` property set equal
* to the value of the `message` parameter. If the `message` parameter is
* undefined, a default error message is assigned. If the `message` parameter is an
* instance of an [Error](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-error) then it will be thrown instead of the `{@link AssertionError}`.
* @since v13.6.0, v12.16.0
*/
function doesNotMatch(value: string, regExp: RegExp, message?: string | Error): void;
/**
* Tests for partial deep equality between the `actual` and `expected` parameters.
* "Deep" equality means that the enumerable "own" properties of child objects
* are recursively evaluated also by the following rules. "Partial" equality means
* that only properties that exist on the `expected` parameter are going to be
* compared.
*
* This method always passes the same test cases as `assert.deepStrictEqual()`,
* behaving as a super set of it.
* @since v22.13.0
*/
function partialDeepStrictEqual(actual: unknown, expected: unknown, message?: string | Error): void;
}
namespace assert {
export { strict };
}
export = assert;
}
declare module "assert" {
import assert = require("node:assert");
export = assert;
}

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/**
* In strict assertion mode, non-strict methods behave like their corresponding
* strict methods. For example, `assert.deepEqual()` will behave like
* `assert.deepStrictEqual()`.
*
* In strict assertion mode, error messages for objects display a diff. In legacy
* assertion mode, error messages for objects display the objects, often truncated.
*
* To use strict assertion mode:
*
* ```js
* import { strict as assert } from 'node:assert';
* ```
*
* ```js
* import assert from 'node:assert/strict';
* ```
*
* Example error diff:
*
* ```js
* import { strict as assert } from 'node:assert';
*
* assert.deepEqual([[[1, 2, 3]], 4, 5], [[[1, 2, '3']], 4, 5]);
* // AssertionError: Expected inputs to be strictly deep-equal:
* // + actual - expected ... Lines skipped
* //
* // [
* // [
* // ...
* // 2,
* // + 3
* // - '3'
* // ],
* // ...
* // 5
* // ]
* ```
*
* To deactivate the colors, use the `NO_COLOR` or `NODE_DISABLE_COLORS`
* environment variables. This will also deactivate the colors in the REPL. For
* more on color support in terminal environments, read the tty
* [`getColorDepth()`](https://nodejs.org/docs/latest-v25.x/api/tty.html#writestreamgetcolordepthenv) documentation.
* @since v15.0.0
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/assert/strict.js)
*/
declare module "node:assert/strict" {
import {
Assert,
AssertionError,
AssertionErrorOptions,
AssertOptions,
AssertPredicate,
AssertStrict,
deepStrictEqual,
doesNotMatch,
doesNotReject,
doesNotThrow,
fail,
ifError,
match,
notDeepStrictEqual,
notStrictEqual,
ok,
partialDeepStrictEqual,
rejects,
strictEqual,
throws,
} from "node:assert";
function strict(value: unknown, message?: string | Error): asserts value;
namespace strict {
export {
Assert,
AssertionError,
AssertionErrorOptions,
AssertOptions,
AssertPredicate,
AssertStrict,
deepStrictEqual,
deepStrictEqual as deepEqual,
doesNotMatch,
doesNotReject,
doesNotThrow,
fail,
ifError,
match,
notDeepStrictEqual,
notDeepStrictEqual as notDeepEqual,
notStrictEqual,
notStrictEqual as notEqual,
ok,
partialDeepStrictEqual,
rejects,
strict,
strictEqual,
strictEqual as equal,
throws,
};
}
export = strict;
}
declare module "assert/strict" {
import strict = require("node:assert/strict");
export = strict;
}

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/**
* We strongly discourage the use of the `async_hooks` API.
* Other APIs that can cover most of its use cases include:
*
* * [`AsyncLocalStorage`](https://nodejs.org/docs/latest-v25.x/api/async_context.html#class-asynclocalstorage) tracks async context
* * [`process.getActiveResourcesInfo()`](https://nodejs.org/docs/latest-v25.x/api/process.html#processgetactiveresourcesinfo) tracks active resources
*
* The `node:async_hooks` module provides an API to track asynchronous resources.
* It can be accessed using:
*
* ```js
* import async_hooks from 'node:async_hooks';
* ```
* @experimental
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/async_hooks.js)
*/
declare module "node:async_hooks" {
/**
* ```js
* import { executionAsyncId } from 'node:async_hooks';
* import fs from 'node:fs';
*
* console.log(executionAsyncId()); // 1 - bootstrap
* const path = '.';
* fs.open(path, 'r', (err, fd) => {
* console.log(executionAsyncId()); // 6 - open()
* });
* ```
*
* The ID returned from `executionAsyncId()` is related to execution timing, not
* causality (which is covered by `triggerAsyncId()`):
*
* ```js
* const server = net.createServer((conn) => {
* // Returns the ID of the server, not of the new connection, because the
* // callback runs in the execution scope of the server's MakeCallback().
* async_hooks.executionAsyncId();
*
* }).listen(port, () => {
* // Returns the ID of a TickObject (process.nextTick()) because all
* // callbacks passed to .listen() are wrapped in a nextTick().
* async_hooks.executionAsyncId();
* });
* ```
*
* Promise contexts may not get precise `executionAsyncIds` by default.
* See the section on [promise execution tracking](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#promise-execution-tracking).
* @since v8.1.0
* @return The `asyncId` of the current execution context. Useful to track when something calls.
*/
function executionAsyncId(): number;
/**
* Resource objects returned by `executionAsyncResource()` are most often internal
* Node.js handle objects with undocumented APIs. Using any functions or properties
* on the object is likely to crash your application and should be avoided.
*
* Using `executionAsyncResource()` in the top-level execution context will
* return an empty object as there is no handle or request object to use,
* but having an object representing the top-level can be helpful.
*
* ```js
* import { open } from 'node:fs';
* import { executionAsyncId, executionAsyncResource } from 'node:async_hooks';
*
* console.log(executionAsyncId(), executionAsyncResource()); // 1 {}
* open(new URL(import.meta.url), 'r', (err, fd) => {
* console.log(executionAsyncId(), executionAsyncResource()); // 7 FSReqWrap
* });
* ```
*
* This can be used to implement continuation local storage without the
* use of a tracking `Map` to store the metadata:
*
* ```js
* import { createServer } from 'node:http';
* import {
* executionAsyncId,
* executionAsyncResource,
* createHook,
* } from 'node:async_hooks';
* const sym = Symbol('state'); // Private symbol to avoid pollution
*
* createHook({
* init(asyncId, type, triggerAsyncId, resource) {
* const cr = executionAsyncResource();
* if (cr) {
* resource[sym] = cr[sym];
* }
* },
* }).enable();
*
* const server = createServer((req, res) => {
* executionAsyncResource()[sym] = { state: req.url };
* setTimeout(function() {
* res.end(JSON.stringify(executionAsyncResource()[sym]));
* }, 100);
* }).listen(3000);
* ```
* @since v13.9.0, v12.17.0
* @return The resource representing the current execution. Useful to store data within the resource.
*/
function executionAsyncResource(): object;
/**
* ```js
* const server = net.createServer((conn) => {
* // The resource that caused (or triggered) this callback to be called
* // was that of the new connection. Thus the return value of triggerAsyncId()
* // is the asyncId of "conn".
* async_hooks.triggerAsyncId();
*
* }).listen(port, () => {
* // Even though all callbacks passed to .listen() are wrapped in a nextTick()
* // the callback itself exists because the call to the server's .listen()
* // was made. So the return value would be the ID of the server.
* async_hooks.triggerAsyncId();
* });
* ```
*
* Promise contexts may not get valid `triggerAsyncId`s by default. See
* the section on [promise execution tracking](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#promise-execution-tracking).
* @return The ID of the resource responsible for calling the callback that is currently being executed.
*/
function triggerAsyncId(): number;
interface HookCallbacks {
/**
* Called when a class is constructed that has the possibility to emit an asynchronous event.
* @param asyncId A unique ID for the async resource
* @param type The type of the async resource
* @param triggerAsyncId The unique ID of the async resource in whose execution context this async resource was created
* @param resource Reference to the resource representing the async operation, needs to be released during destroy
*/
init?(asyncId: number, type: string, triggerAsyncId: number, resource: object): void;
/**
* When an asynchronous operation is initiated or completes a callback is called to notify the user.
* The before callback is called just before said callback is executed.
* @param asyncId the unique identifier assigned to the resource about to execute the callback.
*/
before?(asyncId: number): void;
/**
* Called immediately after the callback specified in `before` is completed.
*
* If an uncaught exception occurs during execution of the callback, then `after` will run after the `'uncaughtException'` event is emitted or a `domain`'s handler runs.
* @param asyncId the unique identifier assigned to the resource which has executed the callback.
*/
after?(asyncId: number): void;
/**
* Called when a promise has resolve() called. This may not be in the same execution id
* as the promise itself.
* @param asyncId the unique id for the promise that was resolve()d.
*/
promiseResolve?(asyncId: number): void;
/**
* Called after the resource corresponding to asyncId is destroyed
* @param asyncId a unique ID for the async resource
*/
destroy?(asyncId: number): void;
}
interface AsyncHook {
/**
* Enable the callbacks for a given AsyncHook instance. If no callbacks are provided enabling is a noop.
*/
enable(): this;
/**
* Disable the callbacks for a given AsyncHook instance from the global pool of AsyncHook callbacks to be executed. Once a hook has been disabled it will not be called again until enabled.
*/
disable(): this;
}
/**
* Registers functions to be called for different lifetime events of each async
* operation.
*
* The callbacks `init()`/`before()`/`after()`/`destroy()` are called for the
* respective asynchronous event during a resource's lifetime.
*
* All callbacks are optional. For example, if only resource cleanup needs to
* be tracked, then only the `destroy` callback needs to be passed. The
* specifics of all functions that can be passed to `callbacks` is in the `Hook Callbacks` section.
*
* ```js
* import { createHook } from 'node:async_hooks';
*
* const asyncHook = createHook({
* init(asyncId, type, triggerAsyncId, resource) { },
* destroy(asyncId) { },
* });
* ```
*
* The callbacks will be inherited via the prototype chain:
*
* ```js
* class MyAsyncCallbacks {
* init(asyncId, type, triggerAsyncId, resource) { }
* destroy(asyncId) {}
* }
*
* class MyAddedCallbacks extends MyAsyncCallbacks {
* before(asyncId) { }
* after(asyncId) { }
* }
*
* const asyncHook = async_hooks.createHook(new MyAddedCallbacks());
* ```
*
* Because promises are asynchronous resources whose lifecycle is tracked
* via the async hooks mechanism, the `init()`, `before()`, `after()`, and`destroy()` callbacks _must not_ be async functions that return promises.
* @since v8.1.0
* @param callbacks The `Hook Callbacks` to register
* @return Instance used for disabling and enabling hooks
*/
function createHook(callbacks: HookCallbacks): AsyncHook;
interface AsyncResourceOptions {
/**
* The ID of the execution context that created this async event.
* @default executionAsyncId()
*/
triggerAsyncId?: number | undefined;
/**
* Disables automatic `emitDestroy` when the object is garbage collected.
* This usually does not need to be set (even if `emitDestroy` is called
* manually), unless the resource's `asyncId` is retrieved and the
* sensitive API's `emitDestroy` is called with it.
* @default false
*/
requireManualDestroy?: boolean | undefined;
}
/**
* The class `AsyncResource` is designed to be extended by the embedder's async
* resources. Using this, users can easily trigger the lifetime events of their
* own resources.
*
* The `init` hook will trigger when an `AsyncResource` is instantiated.
*
* The following is an overview of the `AsyncResource` API.
*
* ```js
* import { AsyncResource, executionAsyncId } from 'node:async_hooks';
*
* // AsyncResource() is meant to be extended. Instantiating a
* // new AsyncResource() also triggers init. If triggerAsyncId is omitted then
* // async_hook.executionAsyncId() is used.
* const asyncResource = new AsyncResource(
* type, { triggerAsyncId: executionAsyncId(), requireManualDestroy: false },
* );
*
* // Run a function in the execution context of the resource. This will
* // * establish the context of the resource
* // * trigger the AsyncHooks before callbacks
* // * call the provided function `fn` with the supplied arguments
* // * trigger the AsyncHooks after callbacks
* // * restore the original execution context
* asyncResource.runInAsyncScope(fn, thisArg, ...args);
*
* // Call AsyncHooks destroy callbacks.
* asyncResource.emitDestroy();
*
* // Return the unique ID assigned to the AsyncResource instance.
* asyncResource.asyncId();
*
* // Return the trigger ID for the AsyncResource instance.
* asyncResource.triggerAsyncId();
* ```
*/
class AsyncResource {
/**
* AsyncResource() is meant to be extended. Instantiating a
* new AsyncResource() also triggers init. If triggerAsyncId is omitted then
* async_hook.executionAsyncId() is used.
* @param type The type of async event.
* @param triggerAsyncId The ID of the execution context that created
* this async event (default: `executionAsyncId()`), or an
* AsyncResourceOptions object (since v9.3.0)
*/
constructor(type: string, triggerAsyncId?: number | AsyncResourceOptions);
/**
* Binds the given function to the current execution context.
* @since v14.8.0, v12.19.0
* @param fn The function to bind to the current execution context.
* @param type An optional name to associate with the underlying `AsyncResource`.
*/
static bind<Func extends (this: ThisArg, ...args: any[]) => any, ThisArg>(
fn: Func,
type?: string,
thisArg?: ThisArg,
): Func;
/**
* Binds the given function to execute to this `AsyncResource`'s scope.
* @since v14.8.0, v12.19.0
* @param fn The function to bind to the current `AsyncResource`.
*/
bind<Func extends (...args: any[]) => any>(fn: Func): Func;
/**
* Call the provided function with the provided arguments in the execution context
* of the async resource. This will establish the context, trigger the AsyncHooks
* before callbacks, call the function, trigger the AsyncHooks after callbacks, and
* then restore the original execution context.
* @since v9.6.0
* @param fn The function to call in the execution context of this async resource.
* @param thisArg The receiver to be used for the function call.
* @param args Optional arguments to pass to the function.
*/
runInAsyncScope<This, Result>(
fn: (this: This, ...args: any[]) => Result,
thisArg?: This,
...args: any[]
): Result;
/**
* Call all `destroy` hooks. This should only ever be called once. An error will
* be thrown if it is called more than once. This **must** be manually called. If
* the resource is left to be collected by the GC then the `destroy` hooks will
* never be called.
* @return A reference to `asyncResource`.
*/
emitDestroy(): this;
/**
* @return The unique `asyncId` assigned to the resource.
*/
asyncId(): number;
/**
* @return The same `triggerAsyncId` that is passed to the `AsyncResource` constructor.
*/
triggerAsyncId(): number;
}
interface AsyncLocalStorageOptions {
/**
* The default value to be used when no store is provided.
*/
defaultValue?: any;
/**
* A name for the `AsyncLocalStorage` value.
*/
name?: string | undefined;
}
/**
* This class creates stores that stay coherent through asynchronous operations.
*
* While you can create your own implementation on top of the `node:async_hooks` module, `AsyncLocalStorage` should be preferred as it is a performant and memory
* safe implementation that involves significant optimizations that are non-obvious
* to implement.
*
* The following example uses `AsyncLocalStorage` to build a simple logger
* that assigns IDs to incoming HTTP requests and includes them in messages
* logged within each request.
*
* ```js
* import http from 'node:http';
* import { AsyncLocalStorage } from 'node:async_hooks';
*
* const asyncLocalStorage = new AsyncLocalStorage();
*
* function logWithId(msg) {
* const id = asyncLocalStorage.getStore();
* console.log(`${id !== undefined ? id : '-'}:`, msg);
* }
*
* let idSeq = 0;
* http.createServer((req, res) => {
* asyncLocalStorage.run(idSeq++, () => {
* logWithId('start');
* // Imagine any chain of async operations here
* setImmediate(() => {
* logWithId('finish');
* res.end();
* });
* });
* }).listen(8080);
*
* http.get('http://localhost:8080');
* http.get('http://localhost:8080');
* // Prints:
* // 0: start
* // 0: finish
* // 1: start
* // 1: finish
* ```
*
* Each instance of `AsyncLocalStorage` maintains an independent storage context.
* Multiple instances can safely exist simultaneously without risk of interfering
* with each other's data.
* @since v13.10.0, v12.17.0
*/
class AsyncLocalStorage<T> {
/**
* Creates a new instance of `AsyncLocalStorage`. Store is only provided within a
* `run()` call or after an `enterWith()` call.
*/
constructor(options?: AsyncLocalStorageOptions);
/**
* Binds the given function to the current execution context.
* @since v19.8.0
* @param fn The function to bind to the current execution context.
* @return A new function that calls `fn` within the captured execution context.
*/
static bind<Func extends (...args: any[]) => any>(fn: Func): Func;
/**
* Captures the current execution context and returns a function that accepts a
* function as an argument. Whenever the returned function is called, it
* calls the function passed to it within the captured context.
*
* ```js
* const asyncLocalStorage = new AsyncLocalStorage();
* const runInAsyncScope = asyncLocalStorage.run(123, () => AsyncLocalStorage.snapshot());
* const result = asyncLocalStorage.run(321, () => runInAsyncScope(() => asyncLocalStorage.getStore()));
* console.log(result); // returns 123
* ```
*
* AsyncLocalStorage.snapshot() can replace the use of AsyncResource for simple
* async context tracking purposes, for example:
*
* ```js
* class Foo {
* #runInAsyncScope = AsyncLocalStorage.snapshot();
*
* get() { return this.#runInAsyncScope(() => asyncLocalStorage.getStore()); }
* }
*
* const foo = asyncLocalStorage.run(123, () => new Foo());
* console.log(asyncLocalStorage.run(321, () => foo.get())); // returns 123
* ```
* @since v19.8.0
* @return A new function with the signature `(fn: (...args) : R, ...args) : R`.
*/
static snapshot(): <R, TArgs extends any[]>(fn: (...args: TArgs) => R, ...args: TArgs) => R;
/**
* Disables the instance of `AsyncLocalStorage`. All subsequent calls
* to `asyncLocalStorage.getStore()` will return `undefined` until `asyncLocalStorage.run()` or `asyncLocalStorage.enterWith()` is called again.
*
* When calling `asyncLocalStorage.disable()`, all current contexts linked to the
* instance will be exited.
*
* Calling `asyncLocalStorage.disable()` is required before the `asyncLocalStorage` can be garbage collected. This does not apply to stores
* provided by the `asyncLocalStorage`, as those objects are garbage collected
* along with the corresponding async resources.
*
* Use this method when the `asyncLocalStorage` is not in use anymore
* in the current process.
* @since v13.10.0, v12.17.0
* @experimental
*/
disable(): void;
/**
* Returns the current store.
* If called outside of an asynchronous context initialized by
* calling `asyncLocalStorage.run()` or `asyncLocalStorage.enterWith()`, it
* returns `undefined`.
* @since v13.10.0, v12.17.0
*/
getStore(): T | undefined;
/**
* The name of the `AsyncLocalStorage` instance if provided.
* @since v24.0.0
*/
readonly name: string;
/**
* Runs a function synchronously within a context and returns its
* return value. The store is not accessible outside of the callback function.
* The store is accessible to any asynchronous operations created within the
* callback.
*
* The optional `args` are passed to the callback function.
*
* If the callback function throws an error, the error is thrown by `run()` too.
* The stacktrace is not impacted by this call and the context is exited.
*
* Example:
*
* ```js
* const store = { id: 2 };
* try {
* asyncLocalStorage.run(store, () => {
* asyncLocalStorage.getStore(); // Returns the store object
* setTimeout(() => {
* asyncLocalStorage.getStore(); // Returns the store object
* }, 200);
* throw new Error();
* });
* } catch (e) {
* asyncLocalStorage.getStore(); // Returns undefined
* // The error will be caught here
* }
* ```
* @since v13.10.0, v12.17.0
*/
run<R>(store: T, callback: () => R): R;
run<R, TArgs extends any[]>(store: T, callback: (...args: TArgs) => R, ...args: TArgs): R;
/**
* Runs a function synchronously outside of a context and returns its
* return value. The store is not accessible within the callback function or
* the asynchronous operations created within the callback. Any `getStore()` call done within the callback function will always return `undefined`.
*
* The optional `args` are passed to the callback function.
*
* If the callback function throws an error, the error is thrown by `exit()` too.
* The stacktrace is not impacted by this call and the context is re-entered.
*
* Example:
*
* ```js
* // Within a call to run
* try {
* asyncLocalStorage.getStore(); // Returns the store object or value
* asyncLocalStorage.exit(() => {
* asyncLocalStorage.getStore(); // Returns undefined
* throw new Error();
* });
* } catch (e) {
* asyncLocalStorage.getStore(); // Returns the same object or value
* // The error will be caught here
* }
* ```
* @since v13.10.0, v12.17.0
* @experimental
*/
exit<R, TArgs extends any[]>(callback: (...args: TArgs) => R, ...args: TArgs): R;
/**
* Transitions into the context for the remainder of the current
* synchronous execution and then persists the store through any following
* asynchronous calls.
*
* Example:
*
* ```js
* const store = { id: 1 };
* // Replaces previous store with the given store object
* asyncLocalStorage.enterWith(store);
* asyncLocalStorage.getStore(); // Returns the store object
* someAsyncOperation(() => {
* asyncLocalStorage.getStore(); // Returns the same object
* });
* ```
*
* This transition will continue for the _entire_ synchronous execution.
* This means that if, for example, the context is entered within an event
* handler subsequent event handlers will also run within that context unless
* specifically bound to another context with an `AsyncResource`. That is why `run()` should be preferred over `enterWith()` unless there are strong reasons
* to use the latter method.
*
* ```js
* const store = { id: 1 };
*
* emitter.on('my-event', () => {
* asyncLocalStorage.enterWith(store);
* });
* emitter.on('my-event', () => {
* asyncLocalStorage.getStore(); // Returns the same object
* });
*
* asyncLocalStorage.getStore(); // Returns undefined
* emitter.emit('my-event');
* asyncLocalStorage.getStore(); // Returns the same object
* ```
* @since v13.11.0, v12.17.0
* @experimental
*/
enterWith(store: T): void;
}
/**
* @since v17.2.0, v16.14.0
* @return A map of provider types to the corresponding numeric id.
* This map contains all the event types that might be emitted by the `async_hooks.init()` event.
*/
namespace asyncWrapProviders {
const NONE: number;
const DIRHANDLE: number;
const DNSCHANNEL: number;
const ELDHISTOGRAM: number;
const FILEHANDLE: number;
const FILEHANDLECLOSEREQ: number;
const FIXEDSIZEBLOBCOPY: number;
const FSEVENTWRAP: number;
const FSREQCALLBACK: number;
const FSREQPROMISE: number;
const GETADDRINFOREQWRAP: number;
const GETNAMEINFOREQWRAP: number;
const HEAPSNAPSHOT: number;
const HTTP2SESSION: number;
const HTTP2STREAM: number;
const HTTP2PING: number;
const HTTP2SETTINGS: number;
const HTTPINCOMINGMESSAGE: number;
const HTTPCLIENTREQUEST: number;
const JSSTREAM: number;
const JSUDPWRAP: number;
const MESSAGEPORT: number;
const PIPECONNECTWRAP: number;
const PIPESERVERWRAP: number;
const PIPEWRAP: number;
const PROCESSWRAP: number;
const PROMISE: number;
const QUERYWRAP: number;
const SHUTDOWNWRAP: number;
const SIGNALWRAP: number;
const STATWATCHER: number;
const STREAMPIPE: number;
const TCPCONNECTWRAP: number;
const TCPSERVERWRAP: number;
const TCPWRAP: number;
const TTYWRAP: number;
const UDPSENDWRAP: number;
const UDPWRAP: number;
const SIGINTWATCHDOG: number;
const WORKER: number;
const WORKERHEAPSNAPSHOT: number;
const WRITEWRAP: number;
const ZLIB: number;
const CHECKPRIMEREQUEST: number;
const PBKDF2REQUEST: number;
const KEYPAIRGENREQUEST: number;
const KEYGENREQUEST: number;
const KEYEXPORTREQUEST: number;
const CIPHERREQUEST: number;
const DERIVEBITSREQUEST: number;
const HASHREQUEST: number;
const RANDOMBYTESREQUEST: number;
const RANDOMPRIMEREQUEST: number;
const SCRYPTREQUEST: number;
const SIGNREQUEST: number;
const TLSWRAP: number;
const VERIFYREQUEST: number;
}
}
declare module "async_hooks" {
export * from "node:async_hooks";
}

466
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@ -0,0 +1,466 @@
declare module "node:buffer" {
type ImplicitArrayBuffer<T extends WithImplicitCoercion<ArrayBufferLike>> = T extends
{ valueOf(): infer V extends ArrayBufferLike } ? V : T;
global {
interface BufferConstructor {
// see buffer.d.ts for implementation shared with all TypeScript versions
/**
* Allocates a new buffer containing the given {str}.
*
* @param str String to store in buffer.
* @param encoding encoding to use, optional. Default is 'utf8'
* @deprecated since v10.0.0 - Use `Buffer.from(string[, encoding])` instead.
*/
new(str: string, encoding?: BufferEncoding): Buffer<ArrayBuffer>;
/**
* Allocates a new buffer of {size} octets.
*
* @param size count of octets to allocate.
* @deprecated since v10.0.0 - Use `Buffer.alloc()` instead (also see `Buffer.allocUnsafe()`).
*/
new(size: number): Buffer<ArrayBuffer>;
/**
* Allocates a new buffer containing the given {array} of octets.
*
* @param array The octets to store.
* @deprecated since v10.0.0 - Use `Buffer.from(array)` instead.
*/
new(array: ArrayLike<number>): Buffer<ArrayBuffer>;
/**
* Produces a Buffer backed by the same allocated memory as
* the given {ArrayBuffer}/{SharedArrayBuffer}.
*
* @param arrayBuffer The ArrayBuffer with which to share memory.
* @deprecated since v10.0.0 - Use `Buffer.from(arrayBuffer[, byteOffset[, length]])` instead.
*/
new<TArrayBuffer extends ArrayBufferLike = ArrayBuffer>(arrayBuffer: TArrayBuffer): Buffer<TArrayBuffer>;
/**
* Allocates a new `Buffer` using an `array` of bytes in the range `0` – `255`.
* Array entries outside that range will be truncated to fit into it.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* // Creates a new Buffer containing the UTF-8 bytes of the string 'buffer'.
* const buf = Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]);
* ```
*
* If `array` is an `Array`-like object (that is, one with a `length` property of
* type `number`), it is treated as if it is an array, unless it is a `Buffer` or
* a `Uint8Array`. This means all other `TypedArray` variants get treated as an
* `Array`. To create a `Buffer` from the bytes backing a `TypedArray`, use
* `Buffer.copyBytesFrom()`.
*
* A `TypeError` will be thrown if `array` is not an `Array` or another type
* appropriate for `Buffer.from()` variants.
*
* `Buffer.from(array)` and `Buffer.from(string)` may also use the internal
* `Buffer` pool like `Buffer.allocUnsafe()` does.
* @since v5.10.0
*/
from(array: WithImplicitCoercion<ArrayLike<number>>): Buffer<ArrayBuffer>;
/**
* This creates a view of the `ArrayBuffer` without copying the underlying
* memory. For example, when passed a reference to the `.buffer` property of a
* `TypedArray` instance, the newly created `Buffer` will share the same
* allocated memory as the `TypedArray`'s underlying `ArrayBuffer`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const arr = new Uint16Array(2);
*
* arr[0] = 5000;
* arr[1] = 4000;
*
* // Shares memory with `arr`.
* const buf = Buffer.from(arr.buffer);
*
* console.log(buf);
* // Prints: <Buffer 88 13 a0 0f>
*
* // Changing the original Uint16Array changes the Buffer also.
* arr[1] = 6000;
*
* console.log(buf);
* // Prints: <Buffer 88 13 70 17>
* ```
*
* The optional `byteOffset` and `length` arguments specify a memory range within
* the `arrayBuffer` that will be shared by the `Buffer`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const ab = new ArrayBuffer(10);
* const buf = Buffer.from(ab, 0, 2);
*
* console.log(buf.length);
* // Prints: 2
* ```
*
* A `TypeError` will be thrown if `arrayBuffer` is not an `ArrayBuffer` or a
* `SharedArrayBuffer` or another type appropriate for `Buffer.from()`
* variants.
*
* It is important to remember that a backing `ArrayBuffer` can cover a range
* of memory that extends beyond the bounds of a `TypedArray` view. A new
* `Buffer` created using the `buffer` property of a `TypedArray` may extend
* beyond the range of the `TypedArray`:
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const arrA = Uint8Array.from([0x63, 0x64, 0x65, 0x66]); // 4 elements
* const arrB = new Uint8Array(arrA.buffer, 1, 2); // 2 elements
* console.log(arrA.buffer === arrB.buffer); // true
*
* const buf = Buffer.from(arrB.buffer);
* console.log(buf);
* // Prints: <Buffer 63 64 65 66>
* ```
* @since v5.10.0
* @param arrayBuffer An `ArrayBuffer`, `SharedArrayBuffer`, for example the
* `.buffer` property of a `TypedArray`.
* @param byteOffset Index of first byte to expose. **Default:** `0`.
* @param length Number of bytes to expose. **Default:**
* `arrayBuffer.byteLength - byteOffset`.
*/
from<TArrayBuffer extends WithImplicitCoercion<ArrayBufferLike>>(
arrayBuffer: TArrayBuffer,
byteOffset?: number,
length?: number,
): Buffer<ImplicitArrayBuffer<TArrayBuffer>>;
/**
* Creates a new `Buffer` containing `string`. The `encoding` parameter identifies
* the character encoding to be used when converting `string` into bytes.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf1 = Buffer.from('this is a tést');
* const buf2 = Buffer.from('7468697320697320612074c3a97374', 'hex');
*
* console.log(buf1.toString());
* // Prints: this is a tést
* console.log(buf2.toString());
* // Prints: this is a tést
* console.log(buf1.toString('latin1'));
* // Prints: this is a tést
* ```
*
* A `TypeError` will be thrown if `string` is not a string or another type
* appropriate for `Buffer.from()` variants.
*
* `Buffer.from(string)` may also use the internal `Buffer` pool like
* `Buffer.allocUnsafe()` does.
* @since v5.10.0
* @param string A string to encode.
* @param encoding The encoding of `string`. **Default:** `'utf8'`.
*/
from(string: WithImplicitCoercion<string>, encoding?: BufferEncoding): Buffer<ArrayBuffer>;
from(arrayOrString: WithImplicitCoercion<ArrayLike<number> | string>): Buffer<ArrayBuffer>;
/**
* Creates a new Buffer using the passed {data}
* @param values to create a new Buffer
*/
of(...items: number[]): Buffer<ArrayBuffer>;
/**
* Returns a new `Buffer` which is the result of concatenating all the `Buffer` instances in the `list` together.
*
* If the list has no items, or if the `totalLength` is 0, then a new zero-length `Buffer` is returned.
*
* If `totalLength` is not provided, it is calculated from the `Buffer` instances
* in `list` by adding their lengths.
*
* If `totalLength` is provided, it is coerced to an unsigned integer. If the
* combined length of the `Buffer`s in `list` exceeds `totalLength`, the result is
* truncated to `totalLength`. If the combined length of the `Buffer`s in `list` is
* less than `totalLength`, the remaining space is filled with zeros.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* // Create a single `Buffer` from a list of three `Buffer` instances.
*
* const buf1 = Buffer.alloc(10);
* const buf2 = Buffer.alloc(14);
* const buf3 = Buffer.alloc(18);
* const totalLength = buf1.length + buf2.length + buf3.length;
*
* console.log(totalLength);
* // Prints: 42
*
* const bufA = Buffer.concat([buf1, buf2, buf3], totalLength);
*
* console.log(bufA);
* // Prints: <Buffer 00 00 00 00 ...>
* console.log(bufA.length);
* // Prints: 42
* ```
*
* `Buffer.concat()` may also use the internal `Buffer` pool like `Buffer.allocUnsafe()` does.
* @since v0.7.11
* @param list List of `Buffer` or {@link Uint8Array} instances to concatenate.
* @param totalLength Total length of the `Buffer` instances in `list` when concatenated.
*/
concat(list: readonly Uint8Array[], totalLength?: number): Buffer<ArrayBuffer>;
/**
* Copies the underlying memory of `view` into a new `Buffer`.
*
* ```js
* const u16 = new Uint16Array([0, 0xffff]);
* const buf = Buffer.copyBytesFrom(u16, 1, 1);
* u16[1] = 0;
* console.log(buf.length); // 2
* console.log(buf[0]); // 255
* console.log(buf[1]); // 255
* ```
* @since v19.8.0
* @param view The {TypedArray} to copy.
* @param [offset=0] The starting offset within `view`.
* @param [length=view.length - offset] The number of elements from `view` to copy.
*/
copyBytesFrom(view: NodeJS.TypedArray, offset?: number, length?: number): Buffer<ArrayBuffer>;
/**
* Allocates a new `Buffer` of `size` bytes. If `fill` is `undefined`, the`Buffer` will be zero-filled.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.alloc(5);
*
* console.log(buf);
* // Prints: <Buffer 00 00 00 00 00>
* ```
*
* If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown.
*
* If `fill` is specified, the allocated `Buffer` will be initialized by calling `buf.fill(fill)`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.alloc(5, 'a');
*
* console.log(buf);
* // Prints: <Buffer 61 61 61 61 61>
* ```
*
* If both `fill` and `encoding` are specified, the allocated `Buffer` will be
* initialized by calling `buf.fill(fill, encoding)`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.alloc(11, 'aGVsbG8gd29ybGQ=', 'base64');
*
* console.log(buf);
* // Prints: <Buffer 68 65 6c 6c 6f 20 77 6f 72 6c 64>
* ```
*
* Calling `Buffer.alloc()` can be measurably slower than the alternative `Buffer.allocUnsafe()` but ensures that the newly created `Buffer` instance
* contents will never contain sensitive data from previous allocations, including
* data that might not have been allocated for `Buffer`s.
*
* A `TypeError` will be thrown if `size` is not a number.
* @since v5.10.0
* @param size The desired length of the new `Buffer`.
* @param [fill=0] A value to pre-fill the new `Buffer` with.
* @param [encoding='utf8'] If `fill` is a string, this is its encoding.
*/
alloc(size: number, fill?: string | Uint8Array | number, encoding?: BufferEncoding): Buffer<ArrayBuffer>;
/**
* Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown.
*
* The underlying memory for `Buffer` instances created in this way is _not_
* _initialized_. The contents of the newly created `Buffer` are unknown and _may contain sensitive data_. Use `Buffer.alloc()` instead to initialize`Buffer` instances with zeroes.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.allocUnsafe(10);
*
* console.log(buf);
* // Prints (contents may vary): <Buffer a0 8b 28 3f 01 00 00 00 50 32>
*
* buf.fill(0);
*
* console.log(buf);
* // Prints: <Buffer 00 00 00 00 00 00 00 00 00 00>
* ```
*
* A `TypeError` will be thrown if `size` is not a number.
*
* The `Buffer` module pre-allocates an internal `Buffer` instance of
* size `Buffer.poolSize` that is used as a pool for the fast allocation of new `Buffer` instances created using `Buffer.allocUnsafe()`, `Buffer.from(array)`,
* and `Buffer.concat()` only when `size` is less than `Buffer.poolSize >>> 1` (floor of `Buffer.poolSize` divided by two).
*
* Use of this pre-allocated internal memory pool is a key difference between
* calling `Buffer.alloc(size, fill)` vs. `Buffer.allocUnsafe(size).fill(fill)`.
* Specifically, `Buffer.alloc(size, fill)` will _never_ use the internal `Buffer`pool, while `Buffer.allocUnsafe(size).fill(fill)`_will_ use the internal`Buffer` pool if `size` is less
* than or equal to half `Buffer.poolSize`. The
* difference is subtle but can be important when an application requires the
* additional performance that `Buffer.allocUnsafe()` provides.
* @since v5.10.0
* @param size The desired length of the new `Buffer`.
*/
allocUnsafe(size: number): Buffer<ArrayBuffer>;
/**
* Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown. A zero-length `Buffer` is created if
* `size` is 0.
*
* The underlying memory for `Buffer` instances created in this way is _not_
* _initialized_. The contents of the newly created `Buffer` are unknown and _may contain sensitive data_. Use `buf.fill(0)` to initialize
* such `Buffer` instances with zeroes.
*
* When using `Buffer.allocUnsafe()` to allocate new `Buffer` instances,
* allocations under 4 KiB are sliced from a single pre-allocated `Buffer`. This
* allows applications to avoid the garbage collection overhead of creating many
* individually allocated `Buffer` instances. This approach improves both
* performance and memory usage by eliminating the need to track and clean up as
* many individual `ArrayBuffer` objects.
*
* However, in the case where a developer may need to retain a small chunk of
* memory from a pool for an indeterminate amount of time, it may be appropriate
* to create an un-pooled `Buffer` instance using `Buffer.allocUnsafeSlow()` and
* then copying out the relevant bits.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* // Need to keep around a few small chunks of memory.
* const store = [];
*
* socket.on('readable', () => {
* let data;
* while (null !== (data = readable.read())) {
* // Allocate for retained data.
* const sb = Buffer.allocUnsafeSlow(10);
*
* // Copy the data into the new allocation.
* data.copy(sb, 0, 0, 10);
*
* store.push(sb);
* }
* });
* ```
*
* A `TypeError` will be thrown if `size` is not a number.
* @since v5.12.0
* @param size The desired length of the new `Buffer`.
*/
allocUnsafeSlow(size: number): Buffer<ArrayBuffer>;
}
interface Buffer<TArrayBuffer extends ArrayBufferLike = ArrayBufferLike> extends Uint8Array<TArrayBuffer> {
// see buffer.d.ts for implementation shared with all TypeScript versions
/**
* Returns a new `Buffer` that references the same memory as the original, but
* offset and cropped by the `start` and `end` indices.
*
* This method is not compatible with the `Uint8Array.prototype.slice()`,
* which is a superclass of `Buffer`. To copy the slice, use`Uint8Array.prototype.slice()`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.from('buffer');
*
* const copiedBuf = Uint8Array.prototype.slice.call(buf);
* copiedBuf[0]++;
* console.log(copiedBuf.toString());
* // Prints: cuffer
*
* console.log(buf.toString());
* // Prints: buffer
*
* // With buf.slice(), the original buffer is modified.
* const notReallyCopiedBuf = buf.slice();
* notReallyCopiedBuf[0]++;
* console.log(notReallyCopiedBuf.toString());
* // Prints: cuffer
* console.log(buf.toString());
* // Also prints: cuffer (!)
* ```
* @since v0.3.0
* @deprecated Use `subarray` instead.
* @param [start=0] Where the new `Buffer` will start.
* @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
*/
slice(start?: number, end?: number): Buffer<ArrayBuffer>;
/**
* Returns a new `Buffer` that references the same memory as the original, but
* offset and cropped by the `start` and `end` indices.
*
* Specifying `end` greater than `buf.length` will return the same result as
* that of `end` equal to `buf.length`.
*
* This method is inherited from [`TypedArray.prototype.subarray()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/subarray).
*
* Modifying the new `Buffer` slice will modify the memory in the original `Buffer`because the allocated memory of the two objects overlap.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* // Create a `Buffer` with the ASCII alphabet, take a slice, and modify one byte
* // from the original `Buffer`.
*
* const buf1 = Buffer.allocUnsafe(26);
*
* for (let i = 0; i < 26; i++) {
* // 97 is the decimal ASCII value for 'a'.
* buf1[i] = i + 97;
* }
*
* const buf2 = buf1.subarray(0, 3);
*
* console.log(buf2.toString('ascii', 0, buf2.length));
* // Prints: abc
*
* buf1[0] = 33;
*
* console.log(buf2.toString('ascii', 0, buf2.length));
* // Prints: !bc
* ```
*
* Specifying negative indexes causes the slice to be generated relative to the
* end of `buf` rather than the beginning.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.from('buffer');
*
* console.log(buf.subarray(-6, -1).toString());
* // Prints: buffe
* // (Equivalent to buf.subarray(0, 5).)
*
* console.log(buf.subarray(-6, -2).toString());
* // Prints: buff
* // (Equivalent to buf.subarray(0, 4).)
*
* console.log(buf.subarray(-5, -2).toString());
* // Prints: uff
* // (Equivalent to buf.subarray(1, 4).)
* ```
* @since v3.0.0
* @param [start=0] Where the new `Buffer` will start.
* @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
*/
subarray(start?: number, end?: number): Buffer<TArrayBuffer>;
}
// TODO: remove globals in future version
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedBuffer = Buffer<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type AllowSharedBuffer = Buffer<ArrayBufferLike>;
}
}

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/**
* Clusters of Node.js processes can be used to run multiple instances of Node.js
* that can distribute workloads among their application threads. When process isolation
* is not needed, use the [`worker_threads`](https://nodejs.org/docs/latest-v25.x/api/worker_threads.html)
* module instead, which allows running multiple application threads within a single Node.js instance.
*
* The cluster module allows easy creation of child processes that all share
* server ports.
*
* ```js
* import cluster from 'node:cluster';
* import http from 'node:http';
* import { availableParallelism } from 'node:os';
* import process from 'node:process';
*
* const numCPUs = availableParallelism();
*
* if (cluster.isPrimary) {
* console.log(`Primary ${process.pid} is running`);
*
* // Fork workers.
* for (let i = 0; i < numCPUs; i++) {
* cluster.fork();
* }
*
* cluster.on('exit', (worker, code, signal) => {
* console.log(`worker ${worker.process.pid} died`);
* });
* } else {
* // Workers can share any TCP connection
* // In this case it is an HTTP server
* http.createServer((req, res) => {
* res.writeHead(200);
* res.end('hello world\n');
* }).listen(8000);
*
* console.log(`Worker ${process.pid} started`);
* }
* ```
*
* Running Node.js will now share port 8000 between the workers:
*
* ```console
* $ node server.js
* Primary 3596 is running
* Worker 4324 started
* Worker 4520 started
* Worker 6056 started
* Worker 5644 started
* ```
*
* On Windows, it is not yet possible to set up a named pipe server in a worker.
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/cluster.js)
*/
declare module "node:cluster" {
import * as child_process from "node:child_process";
import { EventEmitter, InternalEventEmitter } from "node:events";
class Worker implements EventEmitter {
constructor(options?: cluster.WorkerOptions);
/**
* Each new worker is given its own unique id, this id is stored in the `id`.
*
* While a worker is alive, this is the key that indexes it in `cluster.workers`.
* @since v0.8.0
*/
id: number;
/**
* All workers are created using [`child_process.fork()`](https://nodejs.org/docs/latest-v25.x/api/child_process.html#child_processforkmodulepath-args-options), the returned object
* from this function is stored as `.process`. In a worker, the global `process` is stored.
*
* See: [Child Process module](https://nodejs.org/docs/latest-v25.x/api/child_process.html#child_processforkmodulepath-args-options).
*
* Workers will call `process.exit(0)` if the `'disconnect'` event occurs
* on `process` and `.exitedAfterDisconnect` is not `true`. This protects against
* accidental disconnection.
* @since v0.7.0
*/
process: child_process.ChildProcess;
/**
* Send a message to a worker or primary, optionally with a handle.
*
* In the primary, this sends a message to a specific worker. It is identical to [`ChildProcess.send()`](https://nodejs.org/docs/latest-v25.x/api/child_process.html#subprocesssendmessage-sendhandle-options-callback).
*
* In a worker, this sends a message to the primary. It is identical to `process.send()`.
*
* This example will echo back all messages from the primary:
*
* ```js
* if (cluster.isPrimary) {
* const worker = cluster.fork();
* worker.send('hi there');
*
* } else if (cluster.isWorker) {
* process.on('message', (msg) => {
* process.send(msg);
* });
* }
* ```
* @since v0.7.0
* @param options The `options` argument, if present, is an object used to parameterize the sending of certain types of handles.
*/
send(message: child_process.Serializable, callback?: (error: Error | null) => void): boolean;
send(
message: child_process.Serializable,
sendHandle: child_process.SendHandle,
callback?: (error: Error | null) => void,
): boolean;
send(
message: child_process.Serializable,
sendHandle: child_process.SendHandle,
options?: child_process.MessageOptions,
callback?: (error: Error | null) => void,
): boolean;
/**
* This function will kill the worker. In the primary worker, it does this by
* disconnecting the `worker.process`, and once disconnected, killing with `signal`. In the worker, it does it by killing the process with `signal`.
*
* The `kill()` function kills the worker process without waiting for a graceful
* disconnect, it has the same behavior as `worker.process.kill()`.
*
* This method is aliased as `worker.destroy()` for backwards compatibility.
*
* In a worker, `process.kill()` exists, but it is not this function;
* it is [`kill()`](https://nodejs.org/docs/latest-v25.x/api/process.html#processkillpid-signal).
* @since v0.9.12
* @param [signal='SIGTERM'] Name of the kill signal to send to the worker process.
*/
kill(signal?: string): void;
destroy(signal?: string): void;
/**
* In a worker, this function will close all servers, wait for the `'close'` event
* on those servers, and then disconnect the IPC channel.
*
* In the primary, an internal message is sent to the worker causing it to call `.disconnect()` on itself.
*
* Causes `.exitedAfterDisconnect` to be set.
*
* After a server is closed, it will no longer accept new connections,
* but connections may be accepted by any other listening worker. Existing
* connections will be allowed to close as usual. When no more connections exist,
* see `server.close()`, the IPC channel to the worker will close allowing it
* to die gracefully.
*
* The above applies _only_ to server connections, client connections are not
* automatically closed by workers, and disconnect does not wait for them to close
* before exiting.
*
* In a worker, `process.disconnect` exists, but it is not this function;
* it is `disconnect()`.
*
* Because long living server connections may block workers from disconnecting, it
* may be useful to send a message, so application specific actions may be taken to
* close them. It also may be useful to implement a timeout, killing a worker if
* the `'disconnect'` event has not been emitted after some time.
*
* ```js
* import net from 'node:net';
*
* if (cluster.isPrimary) {
* const worker = cluster.fork();
* let timeout;
*
* worker.on('listening', (address) => {
* worker.send('shutdown');
* worker.disconnect();
* timeout = setTimeout(() => {
* worker.kill();
* }, 2000);
* });
*
* worker.on('disconnect', () => {
* clearTimeout(timeout);
* });
*
* } else if (cluster.isWorker) {
* const server = net.createServer((socket) => {
* // Connections never end
* });
*
* server.listen(8000);
*
* process.on('message', (msg) => {
* if (msg === 'shutdown') {
* // Initiate graceful close of any connections to server
* }
* });
* }
* ```
* @since v0.7.7
* @return A reference to `worker`.
*/
disconnect(): this;
/**
* This function returns `true` if the worker is connected to its primary via its
* IPC channel, `false` otherwise. A worker is connected to its primary after it
* has been created. It is disconnected after the `'disconnect'` event is emitted.
* @since v0.11.14
*/
isConnected(): boolean;
/**
* This function returns `true` if the worker's process has terminated (either
* because of exiting or being signaled). Otherwise, it returns `false`.
*
* ```js
* import cluster from 'node:cluster';
* import http from 'node:http';
* import { availableParallelism } from 'node:os';
* import process from 'node:process';
*
* const numCPUs = availableParallelism();
*
* if (cluster.isPrimary) {
* console.log(`Primary ${process.pid} is running`);
*
* // Fork workers.
* for (let i = 0; i < numCPUs; i++) {
* cluster.fork();
* }
*
* cluster.on('fork', (worker) => {
* console.log('worker is dead:', worker.isDead());
* });
*
* cluster.on('exit', (worker, code, signal) => {
* console.log('worker is dead:', worker.isDead());
* });
* } else {
* // Workers can share any TCP connection. In this case, it is an HTTP server.
* http.createServer((req, res) => {
* res.writeHead(200);
* res.end(`Current process\n ${process.pid}`);
* process.kill(process.pid);
* }).listen(8000);
* }
* ```
* @since v0.11.14
*/
isDead(): boolean;
/**
* This property is `true` if the worker exited due to `.disconnect()`.
* If the worker exited any other way, it is `false`. If the
* worker has not exited, it is `undefined`.
*
* The boolean `worker.exitedAfterDisconnect` allows distinguishing between
* voluntary and accidental exit, the primary may choose not to respawn a worker
* based on this value.
*
* ```js
* cluster.on('exit', (worker, code, signal) => {
* if (worker.exitedAfterDisconnect === true) {
* console.log('Oh, it was just voluntary – no need to worry');
* }
* });
*
* // kill worker
* worker.kill();
* ```
* @since v6.0.0
*/
exitedAfterDisconnect: boolean;
}
interface Worker extends InternalEventEmitter<cluster.WorkerEventMap> {}
type _Worker = Worker;
namespace cluster {
interface Worker extends _Worker {}
interface WorkerOptions {
id?: number | undefined;
process?: child_process.ChildProcess | undefined;
state?: string | undefined;
}
interface WorkerEventMap {
"disconnect": [];
"error": [error: Error];
"exit": [code: number, signal: string];
"listening": [address: Address];
"message": [message: any, handle: child_process.SendHandle];
"online": [];
}
interface ClusterSettings {
/**
* List of string arguments passed to the Node.js executable.
* @default process.execArgv
*/
execArgv?: string[] | undefined;
/**
* File path to worker file.
* @default process.argv[1]
*/
exec?: string | undefined;
/**
* String arguments passed to worker.
* @default process.argv.slice(2)
*/
args?: readonly string[] | undefined;
/**
* Whether or not to send output to parent's stdio.
* @default false
*/
silent?: boolean | undefined;
/**
* Configures the stdio of forked processes. Because the cluster module relies on IPC to function, this configuration must
* contain an `'ipc'` entry. When this option is provided, it overrides `silent`. See [`child_prcess.spawn()`](https://nodejs.org/docs/latest-v25.x/api/child_process.html#child_processspawncommand-args-options)'s
* [`stdio`](https://nodejs.org/docs/latest-v25.x/api/child_process.html#optionsstdio).
*/
stdio?: any[] | undefined;
/**
* Sets the user identity of the process. (See [`setuid(2)`](https://man7.org/linux/man-pages/man2/setuid.2.html).)
*/
uid?: number | undefined;
/**
* Sets the group identity of the process. (See [`setgid(2)`](https://man7.org/linux/man-pages/man2/setgid.2.html).)
*/
gid?: number | undefined;
/**
* Sets inspector port of worker. This can be a number, or a function that takes no arguments and returns a number.
* By default each worker gets its own port, incremented from the primary's `process.debugPort`.
*/
inspectPort?: number | (() => number) | undefined;
/**
* Specify the kind of serialization used for sending messages between processes. Possible values are `'json'` and `'advanced'`.
* See [Advanced serialization for `child_process`](https://nodejs.org/docs/latest-v25.x/api/child_process.html#advanced-serialization) for more details.
* @default false
*/
serialization?: "json" | "advanced" | undefined;
/**
* Current working directory of the worker process.
* @default undefined (inherits from parent process)
*/
cwd?: string | undefined;
/**
* Hide the forked processes console window that would normally be created on Windows systems.
* @default false
*/
windowsHide?: boolean | undefined;
}
interface Address {
address: string;
port: number;
/**
* The `addressType` is one of:
*
* * `4` (TCPv4)
* * `6` (TCPv6)
* * `-1` (Unix domain socket)
* * `'udp4'` or `'udp6'` (UDPv4 or UDPv6)
*/
addressType: 4 | 6 | -1 | "udp4" | "udp6";
}
interface ClusterEventMap {
"disconnect": [worker: Worker];
"exit": [worker: Worker, code: number, signal: string];
"fork": [worker: Worker];
"listening": [worker: Worker, address: Address];
"message": [worker: Worker, message: any, handle: child_process.SendHandle];
"online": [worker: Worker];
"setup": [settings: ClusterSettings];
}
interface Cluster extends InternalEventEmitter<ClusterEventMap> {
/**
* A `Worker` object contains all public information and method about a worker.
* In the primary it can be obtained using `cluster.workers`. In a worker
* it can be obtained using `cluster.worker`.
* @since v0.7.0
*/
Worker: typeof Worker;
disconnect(callback?: () => void): void;
/**
* Spawn a new worker process.
*
* This can only be called from the primary process.
* @param env Key/value pairs to add to worker process environment.
* @since v0.6.0
*/
fork(env?: any): Worker;
/** @deprecated since v16.0.0 - use isPrimary. */
readonly isMaster: boolean;
/**
* True if the process is a primary. This is determined by the `process.env.NODE_UNIQUE_ID`. If `process.env.NODE_UNIQUE_ID`
* is undefined, then `isPrimary` is `true`.
* @since v16.0.0
*/
readonly isPrimary: boolean;
/**
* True if the process is not a primary (it is the negation of `cluster.isPrimary`).
* @since v0.6.0
*/
readonly isWorker: boolean;
/**
* The scheduling policy, either `cluster.SCHED_RR` for round-robin or `cluster.SCHED_NONE` to leave it to the operating system. This is a
* global setting and effectively frozen once either the first worker is spawned, or [`.setupPrimary()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clustersetupprimarysettings)
* is called, whichever comes first.
*
* `SCHED_RR` is the default on all operating systems except Windows. Windows will change to `SCHED_RR` once libuv is able to effectively distribute
* IOCP handles without incurring a large performance hit.
*
* `cluster.schedulingPolicy` can also be set through the `NODE_CLUSTER_SCHED_POLICY` environment variable. Valid values are `'rr'` and `'none'`.
* @since v0.11.2
*/
schedulingPolicy: number;
/**
* After calling [`.setupPrimary()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clustersetupprimarysettings)
* (or [`.fork()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clusterforkenv)) this settings object will contain
* the settings, including the default values.
*
* This object is not intended to be changed or set manually.
* @since v0.7.1
*/
readonly settings: ClusterSettings;
/** @deprecated since v16.0.0 - use [`.setupPrimary()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clustersetupprimarysettings) instead. */
setupMaster(settings?: ClusterSettings): void;
/**
* `setupPrimary` is used to change the default 'fork' behavior. Once called, the settings will be present in `cluster.settings`.
*
* Any settings changes only affect future calls to [`.fork()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clusterforkenv)
* and have no effect on workers that are already running.
*
* The only attribute of a worker that cannot be set via `.setupPrimary()` is the `env` passed to
* [`.fork()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clusterforkenv).
*
* The defaults above apply to the first call only; the defaults for later calls are the current values at the time of
* `cluster.setupPrimary()` is called.
*
* ```js
* import cluster from 'node:cluster';
*
* cluster.setupPrimary({
* exec: 'worker.js',
* args: ['--use', 'https'],
* silent: true,
* });
* cluster.fork(); // https worker
* cluster.setupPrimary({
* exec: 'worker.js',
* args: ['--use', 'http'],
* });
* cluster.fork(); // http worker
* ```
*
* This can only be called from the primary process.
* @since v16.0.0
*/
setupPrimary(settings?: ClusterSettings): void;
/**
* A reference to the current worker object. Not available in the primary process.
*
* ```js
* import cluster from 'node:cluster';
*
* if (cluster.isPrimary) {
* console.log('I am primary');
* cluster.fork();
* cluster.fork();
* } else if (cluster.isWorker) {
* console.log(`I am worker #${cluster.worker.id}`);
* }
* ```
* @since v0.7.0
*/
readonly worker?: Worker;
/**
* A hash that stores the active worker objects, keyed by `id` field. This makes it easy to loop through all the workers. It is only available in the primary process.
*
* A worker is removed from `cluster.workers` after the worker has disconnected _and_ exited. The order between these two events cannot be determined in advance. However, it
* is guaranteed that the removal from the `cluster.workers` list happens before the last `'disconnect'` or `'exit'` event is emitted.
*
* ```js
* import cluster from 'node:cluster';
*
* for (const worker of Object.values(cluster.workers)) {
* worker.send('big announcement to all workers');
* }
* ```
* @since v0.7.0
*/
readonly workers?: NodeJS.Dict<Worker>;
readonly SCHED_NONE: number;
readonly SCHED_RR: number;
}
}
var cluster: cluster.Cluster;
export = cluster;
}
declare module "cluster" {
import cluster = require("node:cluster");
export = cluster;
}

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// Backwards-compatible iterator interfaces, augmented with iterator helper methods by lib.esnext.iterator in TypeScript 5.6.
// The IterableIterator interface does not contain these methods, which creates assignability issues in places where IteratorObjects
// are expected (eg. DOM-compatible APIs) if lib.esnext.iterator is loaded.
// Also ensures that iterators returned by the Node API, which inherit from Iterator.prototype, correctly expose the iterator helper methods
// if lib.esnext.iterator is loaded.
// TODO: remove once this package no longer supports TS 5.5, and replace NodeJS.BuiltinIteratorReturn with BuiltinIteratorReturn.
// Placeholders for TS <5.6
interface IteratorObject<T, TReturn, TNext> {}
interface AsyncIteratorObject<T, TReturn, TNext> {}
declare namespace NodeJS {
// Populate iterator methods for TS <5.6
interface Iterator<T, TReturn, TNext> extends globalThis.Iterator<T, TReturn, TNext> {}
interface AsyncIterator<T, TReturn, TNext> extends globalThis.AsyncIterator<T, TReturn, TNext> {}
// Polyfill for TS 5.6's instrinsic BuiltinIteratorReturn type, required for DOM-compatible iterators
type BuiltinIteratorReturn = ReturnType<any[][typeof Symbol.iterator]> extends
globalThis.Iterator<any, infer TReturn> ? TReturn
: any;
}

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/**
* The `node:console` module provides a simple debugging console that is similar to
* the JavaScript console mechanism provided by web browsers.
*
* The module exports two specific components:
*
* * A `Console` class with methods such as `console.log()`, `console.error()`, and `console.warn()` that can be used to write to any Node.js stream.
* * A global `console` instance configured to write to [`process.stdout`](https://nodejs.org/docs/latest-v25.x/api/process.html#processstdout) and
* [`process.stderr`](https://nodejs.org/docs/latest-v25.x/api/process.html#processstderr). The global `console` can be used without importing the `node:console` module.
*
* _**Warning**_: The global console object's methods are neither consistently
* synchronous like the browser APIs they resemble, nor are they consistently
* asynchronous like all other Node.js streams. See the [`note on process I/O`](https://nodejs.org/docs/latest-v25.x/api/process.html#a-note-on-process-io) for
* more information.
*
* Example using the global `console`:
*
* ```js
* console.log('hello world');
* // Prints: hello world, to stdout
* console.log('hello %s', 'world');
* // Prints: hello world, to stdout
* console.error(new Error('Whoops, something bad happened'));
* // Prints error message and stack trace to stderr:
* // Error: Whoops, something bad happened
* // at [eval]:5:15
* // at Script.runInThisContext (node:vm:132:18)
* // at Object.runInThisContext (node:vm:309:38)
* // at node:internal/process/execution:77:19
* // at [eval]-wrapper:6:22
* // at evalScript (node:internal/process/execution:76:60)
* // at node:internal/main/eval_string:23:3
*
* const name = 'Will Robinson';
* console.warn(`Danger ${name}! Danger!`);
* // Prints: Danger Will Robinson! Danger!, to stderr
* ```
*
* Example using the `Console` class:
*
* ```js
* const out = getStreamSomehow();
* const err = getStreamSomehow();
* const myConsole = new console.Console(out, err);
*
* myConsole.log('hello world');
* // Prints: hello world, to out
* myConsole.log('hello %s', 'world');
* // Prints: hello world, to out
* myConsole.error(new Error('Whoops, something bad happened'));
* // Prints: [Error: Whoops, something bad happened], to err
*
* const name = 'Will Robinson';
* myConsole.warn(`Danger ${name}! Danger!`);
* // Prints: Danger Will Robinson! Danger!, to err
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/console.js)
*/
declare module "node:console" {
import { InspectOptions } from "node:util";
namespace console {
interface ConsoleOptions {
stdout: NodeJS.WritableStream;
stderr?: NodeJS.WritableStream | undefined;
/**
* Ignore errors when writing to the underlying streams.
* @default true
*/
ignoreErrors?: boolean | undefined;
/**
* Set color support for this `Console` instance. Setting to true enables coloring while inspecting
* values. Setting to `false` disables coloring while inspecting values. Setting to `'auto'` makes color
* support depend on the value of the `isTTY` property and the value returned by `getColorDepth()` on the
* respective stream. This option can not be used, if `inspectOptions.colors` is set as well.
* @default 'auto'
*/
colorMode?: boolean | "auto" | undefined;
/**
* Specifies options that are passed along to
* [`util.inspect()`](https://nodejs.org/docs/latest-v25.x/api/util.html#utilinspectobject-options).
*/
inspectOptions?: InspectOptions | ReadonlyMap<NodeJS.WritableStream, InspectOptions> | undefined;
/**
* Set group indentation.
* @default 2
*/
groupIndentation?: number | undefined;
}
interface Console {
readonly Console: {
prototype: Console;
new(stdout: NodeJS.WritableStream, stderr?: NodeJS.WritableStream, ignoreErrors?: boolean): Console;
new(options: ConsoleOptions): Console;
};
assert(condition?: unknown, ...data: any[]): void;
clear(): void;
count(label?: string): void;
countReset(label?: string): void;
debug(...data: any[]): void;
dir(item?: any, options?: InspectOptions): void;
dirxml(...data: any[]): void;
error(...data: any[]): void;
group(...data: any[]): void;
groupCollapsed(...data: any[]): void;
groupEnd(): void;
info(...data: any[]): void;
log(...data: any[]): void;
table(tabularData?: any, properties?: string[]): void;
time(label?: string): void;
timeEnd(label?: string): void;
timeLog(label?: string, ...data: any[]): void;
trace(...data: any[]): void;
warn(...data: any[]): void;
/**
* This method does not display anything unless used in the inspector. The `console.profile()`
* method starts a JavaScript CPU profile with an optional label until {@link profileEnd}
* is called. The profile is then added to the Profile panel of the inspector.
*
* ```js
* console.profile('MyLabel');
* // Some code
* console.profileEnd('MyLabel');
* // Adds the profile 'MyLabel' to the Profiles panel of the inspector.
* ```
* @since v8.0.0
*/
profile(label?: string): void;
/**
* This method does not display anything unless used in the inspector. Stops the current
* JavaScript CPU profiling session if one has been started and prints the report to the
* Profiles panel of the inspector. See {@link profile} for an example.
*
* If this method is called without a label, the most recently started profile is stopped.
* @since v8.0.0
*/
profileEnd(label?: string): void;
/**
* This method does not display anything unless used in the inspector. The `console.timeStamp()`
* method adds an event with the label `'label'` to the Timeline panel of the inspector.
* @since v8.0.0
*/
timeStamp(label?: string): void;
}
}
var console: console.Console;
export = console;
}
declare module "console" {
import console = require("node:console");
export = console;
}

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/**
* @deprecated The `node:constants` module is deprecated. When requiring access to constants
* relevant to specific Node.js builtin modules, developers should instead refer
* to the `constants` property exposed by the relevant module. For instance,
* `require('node:fs').constants` and `require('node:os').constants`.
*/
declare module "node:constants" {
const constants:
& typeof import("node:os").constants.dlopen
& typeof import("node:os").constants.errno
& typeof import("node:os").constants.priority
& typeof import("node:os").constants.signals
& typeof import("node:fs").constants
& typeof import("node:crypto").constants;
export = constants;
}
declare module "constants" {
import constants = require("node:constants");
export = constants;
}

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/**
* The `node:dgram` module provides an implementation of UDP datagram sockets.
*
* ```js
* import dgram from 'node:dgram';
*
* const server = dgram.createSocket('udp4');
*
* server.on('error', (err) => {
* console.error(`server error:\n${err.stack}`);
* server.close();
* });
*
* server.on('message', (msg, rinfo) => {
* console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
* });
*
* server.on('listening', () => {
* const address = server.address();
* console.log(`server listening ${address.address}:${address.port}`);
* });
*
* server.bind(41234);
* // Prints: server listening 0.0.0.0:41234
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/dgram.js)
*/
declare module "node:dgram" {
import { NonSharedBuffer } from "node:buffer";
import * as dns from "node:dns";
import { Abortable, EventEmitter, InternalEventEmitter } from "node:events";
import { AddressInfo, BlockList } from "node:net";
interface RemoteInfo {
address: string;
family: "IPv4" | "IPv6";
port: number;
size: number;
}
interface BindOptions {
port?: number | undefined;
address?: string | undefined;
exclusive?: boolean | undefined;
fd?: number | undefined;
}
type SocketType = "udp4" | "udp6";
interface SocketOptions extends Abortable {
type: SocketType;
reuseAddr?: boolean | undefined;
reusePort?: boolean | undefined;
/**
* @default false
*/
ipv6Only?: boolean | undefined;
recvBufferSize?: number | undefined;
sendBufferSize?: number | undefined;
lookup?:
| ((
hostname: string,
options: dns.LookupOneOptions,
callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void,
) => void)
| undefined;
receiveBlockList?: BlockList | undefined;
sendBlockList?: BlockList | undefined;
}
/**
* Creates a `dgram.Socket` object. Once the socket is created, calling `socket.bind()` will instruct the socket to begin listening for datagram
* messages. When `address` and `port` are not passed to `socket.bind()` the
* method will bind the socket to the "all interfaces" address on a random port
* (it does the right thing for both `udp4` and `udp6` sockets). The bound address
* and port can be retrieved using `socket.address().address` and `socket.address().port`.
*
* If the `signal` option is enabled, calling `.abort()` on the corresponding `AbortController` is similar to calling `.close()` on the socket:
*
* ```js
* const controller = new AbortController();
* const { signal } = controller;
* const server = dgram.createSocket({ type: 'udp4', signal });
* server.on('message', (msg, rinfo) => {
* console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
* });
* // Later, when you want to close the server.
* controller.abort();
* ```
* @since v0.11.13
* @param options Available options are:
* @param callback Attached as a listener for `'message'` events. Optional.
*/
function createSocket(type: SocketType, callback?: (msg: NonSharedBuffer, rinfo: RemoteInfo) => void): Socket;
function createSocket(options: SocketOptions, callback?: (msg: NonSharedBuffer, rinfo: RemoteInfo) => void): Socket;
interface SocketEventMap {
"close": [];
"connect": [];
"error": [err: Error];
"listening": [];
"message": [msg: NonSharedBuffer, rinfo: RemoteInfo];
}
/**
* Encapsulates the datagram functionality.
*
* New instances of `dgram.Socket` are created using {@link createSocket}.
* The `new` keyword is not to be used to create `dgram.Socket` instances.
* @since v0.1.99
*/
class Socket implements EventEmitter {
/**
* Tells the kernel to join a multicast group at the given `multicastAddress` and `multicastInterface` using the `IP_ADD_MEMBERSHIP` socket option. If the `multicastInterface` argument is not
* specified, the operating system will choose
* one interface and will add membership to it. To add membership to every
* available interface, call `addMembership` multiple times, once per interface.
*
* When called on an unbound socket, this method will implicitly bind to a random
* port, listening on all interfaces.
*
* When sharing a UDP socket across multiple `cluster` workers, the`socket.addMembership()` function must be called only once or an`EADDRINUSE` error will occur:
*
* ```js
* import cluster from 'node:cluster';
* import dgram from 'node:dgram';
*
* if (cluster.isPrimary) {
* cluster.fork(); // Works ok.
* cluster.fork(); // Fails with EADDRINUSE.
* } else {
* const s = dgram.createSocket('udp4');
* s.bind(1234, () => {
* s.addMembership('224.0.0.114');
* });
* }
* ```
* @since v0.6.9
*/
addMembership(multicastAddress: string, multicastInterface?: string): void;
/**
* Returns an object containing the address information for a socket.
* For UDP sockets, this object will contain `address`, `family`, and `port` properties.
*
* This method throws `EBADF` if called on an unbound socket.
* @since v0.1.99
*/
address(): AddressInfo;
/**
* For UDP sockets, causes the `dgram.Socket` to listen for datagram
* messages on a named `port` and optional `address`. If `port` is not
* specified or is `0`, the operating system will attempt to bind to a
* random port. If `address` is not specified, the operating system will
* attempt to listen on all addresses. Once binding is complete, a `'listening'` event is emitted and the optional `callback` function is
* called.
*
* Specifying both a `'listening'` event listener and passing a `callback` to the `socket.bind()` method is not harmful but not very
* useful.
*
* A bound datagram socket keeps the Node.js process running to receive
* datagram messages.
*
* If binding fails, an `'error'` event is generated. In rare case (e.g.
* attempting to bind with a closed socket), an `Error` may be thrown.
*
* Example of a UDP server listening on port 41234:
*
* ```js
* import dgram from 'node:dgram';
*
* const server = dgram.createSocket('udp4');
*
* server.on('error', (err) => {
* console.error(`server error:\n${err.stack}`);
* server.close();
* });
*
* server.on('message', (msg, rinfo) => {
* console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
* });
*
* server.on('listening', () => {
* const address = server.address();
* console.log(`server listening ${address.address}:${address.port}`);
* });
*
* server.bind(41234);
* // Prints: server listening 0.0.0.0:41234
* ```
* @since v0.1.99
* @param callback with no parameters. Called when binding is complete.
*/
bind(port?: number, address?: string, callback?: () => void): this;
bind(port?: number, callback?: () => void): this;
bind(callback?: () => void): this;
bind(options: BindOptions, callback?: () => void): this;
/**
* Close the underlying socket and stop listening for data on it. If a callback is
* provided, it is added as a listener for the `'close'` event.
* @since v0.1.99
* @param callback Called when the socket has been closed.
*/
close(callback?: () => void): this;
/**
* Associates the `dgram.Socket` to a remote address and port. Every
* message sent by this handle is automatically sent to that destination. Also,
* the socket will only receive messages from that remote peer.
* Trying to call `connect()` on an already connected socket will result
* in an `ERR_SOCKET_DGRAM_IS_CONNECTED` exception. If `address` is not
* provided, `'127.0.0.1'` (for `udp4` sockets) or `'::1'` (for `udp6` sockets)
* will be used by default. Once the connection is complete, a `'connect'` event
* is emitted and the optional `callback` function is called. In case of failure,
* the `callback` is called or, failing this, an `'error'` event is emitted.
* @since v12.0.0
* @param callback Called when the connection is completed or on error.
*/
connect(port: number, address?: string, callback?: () => void): void;
connect(port: number, callback: () => void): void;
/**
* A synchronous function that disassociates a connected `dgram.Socket` from
* its remote address. Trying to call `disconnect()` on an unbound or already
* disconnected socket will result in an `ERR_SOCKET_DGRAM_NOT_CONNECTED` exception.
* @since v12.0.0
*/
disconnect(): void;
/**
* Instructs the kernel to leave a multicast group at `multicastAddress` using the `IP_DROP_MEMBERSHIP` socket option. This method is automatically called by the
* kernel when the socket is closed or the process terminates, so most apps will
* never have reason to call this.
*
* If `multicastInterface` is not specified, the operating system will attempt to
* drop membership on all valid interfaces.
* @since v0.6.9
*/
dropMembership(multicastAddress: string, multicastInterface?: string): void;
/**
* This method throws `ERR_SOCKET_BUFFER_SIZE` if called on an unbound socket.
* @since v8.7.0
* @return the `SO_RCVBUF` socket receive buffer size in bytes.
*/
getRecvBufferSize(): number;
/**
* This method throws `ERR_SOCKET_BUFFER_SIZE` if called on an unbound socket.
* @since v8.7.0
* @return the `SO_SNDBUF` socket send buffer size in bytes.
*/
getSendBufferSize(): number;
/**
* @since v18.8.0, v16.19.0
* @return Number of bytes queued for sending.
*/
getSendQueueSize(): number;
/**
* @since v18.8.0, v16.19.0
* @return Number of send requests currently in the queue awaiting to be processed.
*/
getSendQueueCount(): number;
/**
* By default, binding a socket will cause it to block the Node.js process from
* exiting as long as the socket is open. The `socket.unref()` method can be used
* to exclude the socket from the reference counting that keeps the Node.js
* process active. The `socket.ref()` method adds the socket back to the reference
* counting and restores the default behavior.
*
* Calling `socket.ref()` multiples times will have no additional effect.
*
* The `socket.ref()` method returns a reference to the socket so calls can be
* chained.
* @since v0.9.1
*/
ref(): this;
/**
* Returns an object containing the `address`, `family`, and `port` of the remote
* endpoint. This method throws an `ERR_SOCKET_DGRAM_NOT_CONNECTED` exception
* if the socket is not connected.
* @since v12.0.0
*/
remoteAddress(): AddressInfo;
/**
* Broadcasts a datagram on the socket.
* For connectionless sockets, the destination `port` and `address` must be
* specified. Connected sockets, on the other hand, will use their associated
* remote endpoint, so the `port` and `address` arguments must not be set.
*
* The `msg` argument contains the message to be sent.
* Depending on its type, different behavior can apply. If `msg` is a `Buffer`,
* any `TypedArray` or a `DataView`,
* the `offset` and `length` specify the offset within the `Buffer` where the
* message begins and the number of bytes in the message, respectively.
* If `msg` is a `String`, then it is automatically converted to a `Buffer` with `'utf8'` encoding. With messages that
* contain multi-byte characters, `offset` and `length` will be calculated with
* respect to `byte length` and not the character position.
* If `msg` is an array, `offset` and `length` must not be specified.
*
* The `address` argument is a string. If the value of `address` is a host name,
* DNS will be used to resolve the address of the host. If `address` is not
* provided or otherwise nullish, `'127.0.0.1'` (for `udp4` sockets) or `'::1'` (for `udp6` sockets) will be used by default.
*
* If the socket has not been previously bound with a call to `bind`, the socket
* is assigned a random port number and is bound to the "all interfaces" address
* (`'0.0.0.0'` for `udp4` sockets, `'::0'` for `udp6` sockets.)
*
* An optional `callback` function may be specified to as a way of reporting
* DNS errors or for determining when it is safe to reuse the `buf` object.
* DNS lookups delay the time to send for at least one tick of the
* Node.js event loop.
*
* The only way to know for sure that the datagram has been sent is by using a `callback`. If an error occurs and a `callback` is given, the error will be
* passed as the first argument to the `callback`. If a `callback` is not given,
* the error is emitted as an `'error'` event on the `socket` object.
*
* Offset and length are optional but both _must_ be set if either are used.
* They are supported only when the first argument is a `Buffer`, a `TypedArray`,
* or a `DataView`.
*
* This method throws `ERR_SOCKET_BAD_PORT` if called on an unbound socket.
*
* Example of sending a UDP packet to a port on `localhost`;
*
* ```js
* import dgram from 'node:dgram';
* import { Buffer } from 'node:buffer';
*
* const message = Buffer.from('Some bytes');
* const client = dgram.createSocket('udp4');
* client.send(message, 41234, 'localhost', (err) => {
* client.close();
* });
* ```
*
* Example of sending a UDP packet composed of multiple buffers to a port on`127.0.0.1`;
*
* ```js
* import dgram from 'node:dgram';
* import { Buffer } from 'node:buffer';
*
* const buf1 = Buffer.from('Some ');
* const buf2 = Buffer.from('bytes');
* const client = dgram.createSocket('udp4');
* client.send([buf1, buf2], 41234, (err) => {
* client.close();
* });
* ```
*
* Sending multiple buffers might be faster or slower depending on the
* application and operating system. Run benchmarks to
* determine the optimal strategy on a case-by-case basis. Generally speaking,
* however, sending multiple buffers is faster.
*
* Example of sending a UDP packet using a socket connected to a port on `localhost`:
*
* ```js
* import dgram from 'node:dgram';
* import { Buffer } from 'node:buffer';
*
* const message = Buffer.from('Some bytes');
* const client = dgram.createSocket('udp4');
* client.connect(41234, 'localhost', (err) => {
* client.send(message, (err) => {
* client.close();
* });
* });
* ```
* @since v0.1.99
* @param msg Message to be sent.
* @param offset Offset in the buffer where the message starts.
* @param length Number of bytes in the message.
* @param port Destination port.
* @param address Destination host name or IP address.
* @param callback Called when the message has been sent.
*/
send(
msg: string | NodeJS.ArrayBufferView | readonly any[],
port?: number,
address?: string,
callback?: (error: Error | null, bytes: number) => void,
): void;
send(
msg: string | NodeJS.ArrayBufferView | readonly any[],
port?: number,
callback?: (error: Error | null, bytes: number) => void,
): void;
send(
msg: string | NodeJS.ArrayBufferView | readonly any[],
callback?: (error: Error | null, bytes: number) => void,
): void;
send(
msg: string | NodeJS.ArrayBufferView,
offset: number,
length: number,
port?: number,
address?: string,
callback?: (error: Error | null, bytes: number) => void,
): void;
send(
msg: string | NodeJS.ArrayBufferView,
offset: number,
length: number,
port?: number,
callback?: (error: Error | null, bytes: number) => void,
): void;
send(
msg: string | NodeJS.ArrayBufferView,
offset: number,
length: number,
callback?: (error: Error | null, bytes: number) => void,
): void;
/**
* Sets or clears the `SO_BROADCAST` socket option. When set to `true`, UDP
* packets may be sent to a local interface's broadcast address.
*
* This method throws `EBADF` if called on an unbound socket.
* @since v0.6.9
*/
setBroadcast(flag: boolean): void;
/**
* _All references to scope in this section are referring to [IPv6 Zone Indices](https://en.wikipedia.org/wiki/IPv6_address#Scoped_literal_IPv6_addresses), which are defined by [RFC
* 4007](https://tools.ietf.org/html/rfc4007). In string form, an IP_
* _with a scope index is written as `'IP%scope'` where scope is an interface name_
* _or interface number._
*
* Sets the default outgoing multicast interface of the socket to a chosen
* interface or back to system interface selection. The `multicastInterface` must
* be a valid string representation of an IP from the socket's family.
*
* For IPv4 sockets, this should be the IP configured for the desired physical
* interface. All packets sent to multicast on the socket will be sent on the
* interface determined by the most recent successful use of this call.
*
* For IPv6 sockets, `multicastInterface` should include a scope to indicate the
* interface as in the examples that follow. In IPv6, individual `send` calls can
* also use explicit scope in addresses, so only packets sent to a multicast
* address without specifying an explicit scope are affected by the most recent
* successful use of this call.
*
* This method throws `EBADF` if called on an unbound socket.
*
* #### Example: IPv6 outgoing multicast interface
*
* On most systems, where scope format uses the interface name:
*
* ```js
* const socket = dgram.createSocket('udp6');
*
* socket.bind(1234, () => {
* socket.setMulticastInterface('::%eth1');
* });
* ```
*
* On Windows, where scope format uses an interface number:
*
* ```js
* const socket = dgram.createSocket('udp6');
*
* socket.bind(1234, () => {
* socket.setMulticastInterface('::%2');
* });
* ```
*
* #### Example: IPv4 outgoing multicast interface
*
* All systems use an IP of the host on the desired physical interface:
*
* ```js
* const socket = dgram.createSocket('udp4');
*
* socket.bind(1234, () => {
* socket.setMulticastInterface('10.0.0.2');
* });
* ```
* @since v8.6.0
*/
setMulticastInterface(multicastInterface: string): void;
/**
* Sets or clears the `IP_MULTICAST_LOOP` socket option. When set to `true`,
* multicast packets will also be received on the local interface.
*
* This method throws `EBADF` if called on an unbound socket.
* @since v0.3.8
*/
setMulticastLoopback(flag: boolean): boolean;
/**
* Sets the `IP_MULTICAST_TTL` socket option. While TTL generally stands for
* "Time to Live", in this context it specifies the number of IP hops that a
* packet is allowed to travel through, specifically for multicast traffic. Each
* router or gateway that forwards a packet decrements the TTL. If the TTL is
* decremented to 0 by a router, it will not be forwarded.
*
* The `ttl` argument may be between 0 and 255\. The default on most systems is `1`.
*
* This method throws `EBADF` if called on an unbound socket.
* @since v0.3.8
*/
setMulticastTTL(ttl: number): number;
/**
* Sets the `SO_RCVBUF` socket option. Sets the maximum socket receive buffer
* in bytes.
*
* This method throws `ERR_SOCKET_BUFFER_SIZE` if called on an unbound socket.
* @since v8.7.0
*/
setRecvBufferSize(size: number): void;
/**
* Sets the `SO_SNDBUF` socket option. Sets the maximum socket send buffer
* in bytes.
*
* This method throws `ERR_SOCKET_BUFFER_SIZE` if called on an unbound socket.
* @since v8.7.0
*/
setSendBufferSize(size: number): void;
/**
* Sets the `IP_TTL` socket option. While TTL generally stands for "Time to Live",
* in this context it specifies the number of IP hops that a packet is allowed to
* travel through. Each router or gateway that forwards a packet decrements the
* TTL. If the TTL is decremented to 0 by a router, it will not be forwarded.
* Changing TTL values is typically done for network probes or when multicasting.
*
* The `ttl` argument may be between 1 and 255\. The default on most systems
* is 64.
*
* This method throws `EBADF` if called on an unbound socket.
* @since v0.1.101
*/
setTTL(ttl: number): number;
/**
* By default, binding a socket will cause it to block the Node.js process from
* exiting as long as the socket is open. The `socket.unref()` method can be used
* to exclude the socket from the reference counting that keeps the Node.js
* process active, allowing the process to exit even if the socket is still
* listening.
*
* Calling `socket.unref()` multiple times will have no additional effect.
*
* The `socket.unref()` method returns a reference to the socket so calls can be
* chained.
* @since v0.9.1
*/
unref(): this;
/**
* Tells the kernel to join a source-specific multicast channel at the given `sourceAddress` and `groupAddress`, using the `multicastInterface` with the `IP_ADD_SOURCE_MEMBERSHIP` socket
* option. If the `multicastInterface` argument
* is not specified, the operating system will choose one interface and will add
* membership to it. To add membership to every available interface, call `socket.addSourceSpecificMembership()` multiple times, once per interface.
*
* When called on an unbound socket, this method will implicitly bind to a random
* port, listening on all interfaces.
* @since v13.1.0, v12.16.0
*/
addSourceSpecificMembership(sourceAddress: string, groupAddress: string, multicastInterface?: string): void;
/**
* Instructs the kernel to leave a source-specific multicast channel at the given `sourceAddress` and `groupAddress` using the `IP_DROP_SOURCE_MEMBERSHIP` socket option. This method is
* automatically called by the kernel when the
* socket is closed or the process terminates, so most apps will never have
* reason to call this.
*
* If `multicastInterface` is not specified, the operating system will attempt to
* drop membership on all valid interfaces.
* @since v13.1.0, v12.16.0
*/
dropSourceSpecificMembership(sourceAddress: string, groupAddress: string, multicastInterface?: string): void;
/**
* Calls `socket.close()` and returns a promise that fulfills when the socket has closed.
* @since v20.5.0
*/
[Symbol.asyncDispose](): Promise<void>;
}
interface Socket extends InternalEventEmitter<SocketEventMap> {}
}
declare module "dgram" {
export * from "node:dgram";
}

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/**
* The `node:diagnostics_channel` module provides an API to create named channels
* to report arbitrary message data for diagnostics purposes.
*
* It can be accessed using:
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
* ```
*
* It is intended that a module writer wanting to report diagnostics messages
* will create one or many top-level channels to report messages through.
* Channels may also be acquired at runtime but it is not encouraged
* due to the additional overhead of doing so. Channels may be exported for
* convenience, but as long as the name is known it can be acquired anywhere.
*
* If you intend for your module to produce diagnostics data for others to
* consume it is recommended that you include documentation of what named
* channels are used along with the shape of the message data. Channel names
* should generally include the module name to avoid collisions with data from
* other modules.
* @since v15.1.0, v14.17.0
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/diagnostics_channel.js)
*/
declare module "node:diagnostics_channel" {
import { AsyncLocalStorage } from "node:async_hooks";
/**
* Check if there are active subscribers to the named channel. This is helpful if
* the message you want to send might be expensive to prepare.
*
* This API is optional but helpful when trying to publish messages from very
* performance-sensitive code.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* if (diagnostics_channel.hasSubscribers('my-channel')) {
* // There are subscribers, prepare and publish message
* }
* ```
* @since v15.1.0, v14.17.0
* @param name The channel name
* @return If there are active subscribers
*/
function hasSubscribers(name: string | symbol): boolean;
/**
* This is the primary entry-point for anyone wanting to publish to a named
* channel. It produces a channel object which is optimized to reduce overhead at
* publish time as much as possible.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channel = diagnostics_channel.channel('my-channel');
* ```
* @since v15.1.0, v14.17.0
* @param name The channel name
* @return The named channel object
*/
function channel(name: string | symbol): Channel;
type ChannelListener = (message: unknown, name: string | symbol) => void;
/**
* Register a message handler to subscribe to this channel. This message handler
* will be run synchronously whenever a message is published to the channel. Any
* errors thrown in the message handler will trigger an `'uncaughtException'`.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* diagnostics_channel.subscribe('my-channel', (message, name) => {
* // Received data
* });
* ```
* @since v18.7.0, v16.17.0
* @param name The channel name
* @param onMessage The handler to receive channel messages
*/
function subscribe(name: string | symbol, onMessage: ChannelListener): void;
/**
* Remove a message handler previously registered to this channel with {@link subscribe}.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* function onMessage(message, name) {
* // Received data
* }
*
* diagnostics_channel.subscribe('my-channel', onMessage);
*
* diagnostics_channel.unsubscribe('my-channel', onMessage);
* ```
* @since v18.7.0, v16.17.0
* @param name The channel name
* @param onMessage The previous subscribed handler to remove
* @return `true` if the handler was found, `false` otherwise.
*/
function unsubscribe(name: string | symbol, onMessage: ChannelListener): boolean;
/**
* Creates a `TracingChannel` wrapper for the given `TracingChannel Channels`. If a name is given, the corresponding tracing
* channels will be created in the form of `tracing:${name}:${eventType}` where `eventType` corresponds to the types of `TracingChannel Channels`.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channelsByName = diagnostics_channel.tracingChannel('my-channel');
*
* // or...
*
* const channelsByCollection = diagnostics_channel.tracingChannel({
* start: diagnostics_channel.channel('tracing:my-channel:start'),
* end: diagnostics_channel.channel('tracing:my-channel:end'),
* asyncStart: diagnostics_channel.channel('tracing:my-channel:asyncStart'),
* asyncEnd: diagnostics_channel.channel('tracing:my-channel:asyncEnd'),
* error: diagnostics_channel.channel('tracing:my-channel:error'),
* });
* ```
* @since v19.9.0
* @experimental
* @param nameOrChannels Channel name or object containing all the `TracingChannel Channels`
* @return Collection of channels to trace with
*/
function tracingChannel<
StoreType = unknown,
ContextType extends object = StoreType extends object ? StoreType : object,
>(
nameOrChannels: string | TracingChannelCollection<StoreType, ContextType>,
): TracingChannel<StoreType, ContextType>;
/**
* The class `Channel` represents an individual named channel within the data
* pipeline. It is used to track subscribers and to publish messages when there
* are subscribers present. It exists as a separate object to avoid channel
* lookups at publish time, enabling very fast publish speeds and allowing
* for heavy use while incurring very minimal cost. Channels are created with {@link channel}, constructing a channel directly
* with `new Channel(name)` is not supported.
* @since v15.1.0, v14.17.0
*/
class Channel<StoreType = unknown, ContextType = StoreType> {
readonly name: string | symbol;
/**
* Check if there are active subscribers to this channel. This is helpful if
* the message you want to send might be expensive to prepare.
*
* This API is optional but helpful when trying to publish messages from very
* performance-sensitive code.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channel = diagnostics_channel.channel('my-channel');
*
* if (channel.hasSubscribers) {
* // There are subscribers, prepare and publish message
* }
* ```
* @since v15.1.0, v14.17.0
*/
readonly hasSubscribers: boolean;
private constructor(name: string | symbol);
/**
* Publish a message to any subscribers to the channel. This will trigger
* message handlers synchronously so they will execute within the same context.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channel = diagnostics_channel.channel('my-channel');
*
* channel.publish({
* some: 'message',
* });
* ```
* @since v15.1.0, v14.17.0
* @param message The message to send to the channel subscribers
*/
publish(message: unknown): void;
/**
* Register a message handler to subscribe to this channel. This message handler
* will be run synchronously whenever a message is published to the channel. Any
* errors thrown in the message handler will trigger an `'uncaughtException'`.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channel = diagnostics_channel.channel('my-channel');
*
* channel.subscribe((message, name) => {
* // Received data
* });
* ```
* @since v15.1.0, v14.17.0
* @param onMessage The handler to receive channel messages
*/
subscribe(onMessage: ChannelListener): void;
/**
* Remove a message handler previously registered to this channel with `channel.subscribe(onMessage)`.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channel = diagnostics_channel.channel('my-channel');
*
* function onMessage(message, name) {
* // Received data
* }
*
* channel.subscribe(onMessage);
*
* channel.unsubscribe(onMessage);
* ```
* @since v15.1.0, v14.17.0
* @param onMessage The previous subscribed handler to remove
* @return `true` if the handler was found, `false` otherwise.
*/
unsubscribe(onMessage: ChannelListener): void;
/**
* When `channel.runStores(context, ...)` is called, the given context data
* will be applied to any store bound to the channel. If the store has already been
* bound the previous `transform` function will be replaced with the new one.
* The `transform` function may be omitted to set the given context data as the
* context directly.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
* import { AsyncLocalStorage } from 'node:async_hooks';
*
* const store = new AsyncLocalStorage();
*
* const channel = diagnostics_channel.channel('my-channel');
*
* channel.bindStore(store, (data) => {
* return { data };
* });
* ```
* @since v19.9.0
* @experimental
* @param store The store to which to bind the context data
* @param transform Transform context data before setting the store context
*/
bindStore(store: AsyncLocalStorage<StoreType>, transform?: (context: ContextType) => StoreType): void;
/**
* Remove a message handler previously registered to this channel with `channel.bindStore(store)`.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
* import { AsyncLocalStorage } from 'node:async_hooks';
*
* const store = new AsyncLocalStorage();
*
* const channel = diagnostics_channel.channel('my-channel');
*
* channel.bindStore(store);
* channel.unbindStore(store);
* ```
* @since v19.9.0
* @experimental
* @param store The store to unbind from the channel.
* @return `true` if the store was found, `false` otherwise.
*/
unbindStore(store: AsyncLocalStorage<StoreType>): boolean;
/**
* Applies the given data to any AsyncLocalStorage instances bound to the channel
* for the duration of the given function, then publishes to the channel within
* the scope of that data is applied to the stores.
*
* If a transform function was given to `channel.bindStore(store)` it will be
* applied to transform the message data before it becomes the context value for
* the store. The prior storage context is accessible from within the transform
* function in cases where context linking is required.
*
* The context applied to the store should be accessible in any async code which
* continues from execution which began during the given function, however
* there are some situations in which `context loss` may occur.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
* import { AsyncLocalStorage } from 'node:async_hooks';
*
* const store = new AsyncLocalStorage();
*
* const channel = diagnostics_channel.channel('my-channel');
*
* channel.bindStore(store, (message) => {
* const parent = store.getStore();
* return new Span(message, parent);
* });
* channel.runStores({ some: 'message' }, () => {
* store.getStore(); // Span({ some: 'message' })
* });
* ```
* @since v19.9.0
* @experimental
* @param context Message to send to subscribers and bind to stores
* @param fn Handler to run within the entered storage context
* @param thisArg The receiver to be used for the function call.
* @param args Optional arguments to pass to the function.
*/
runStores<ThisArg = any, Args extends any[] = any[], Result = any>(
context: ContextType,
fn: (this: ThisArg, ...args: Args) => Result,
thisArg?: ThisArg,
...args: Args
): Result;
}
interface TracingChannelSubscribers<ContextType extends object> {
start: (message: ContextType) => void;
end: (
message: ContextType & {
error?: unknown;
result?: unknown;
},
) => void;
asyncStart: (
message: ContextType & {
error?: unknown;
result?: unknown;
},
) => void;
asyncEnd: (
message: ContextType & {
error?: unknown;
result?: unknown;
},
) => void;
error: (
message: ContextType & {
error: unknown;
},
) => void;
}
interface TracingChannelCollection<StoreType = unknown, ContextType = StoreType> {
start: Channel<StoreType, ContextType>;
end: Channel<StoreType, ContextType>;
asyncStart: Channel<StoreType, ContextType>;
asyncEnd: Channel<StoreType, ContextType>;
error: Channel<StoreType, ContextType>;
}
/**
* The class `TracingChannel` is a collection of `TracingChannel Channels` which
* together express a single traceable action. It is used to formalize and
* simplify the process of producing events for tracing application flow. {@link tracingChannel} is used to construct a `TracingChannel`. As with `Channel` it is recommended to create and reuse a
* single `TracingChannel` at the top-level of the file rather than creating them
* dynamically.
* @since v19.9.0
* @experimental
*/
class TracingChannel<StoreType = unknown, ContextType extends object = {}> implements TracingChannelCollection {
start: Channel<StoreType, ContextType>;
end: Channel<StoreType, ContextType>;
asyncStart: Channel<StoreType, ContextType>;
asyncEnd: Channel<StoreType, ContextType>;
error: Channel<StoreType, ContextType>;
/**
* Helper to subscribe a collection of functions to the corresponding channels.
* This is the same as calling `channel.subscribe(onMessage)` on each channel
* individually.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channels = diagnostics_channel.tracingChannel('my-channel');
*
* channels.subscribe({
* start(message) {
* // Handle start message
* },
* end(message) {
* // Handle end message
* },
* asyncStart(message) {
* // Handle asyncStart message
* },
* asyncEnd(message) {
* // Handle asyncEnd message
* },
* error(message) {
* // Handle error message
* },
* });
* ```
* @since v19.9.0
* @experimental
* @param subscribers Set of `TracingChannel Channels` subscribers
*/
subscribe(subscribers: TracingChannelSubscribers<ContextType>): void;
/**
* Helper to unsubscribe a collection of functions from the corresponding channels.
* This is the same as calling `channel.unsubscribe(onMessage)` on each channel
* individually.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channels = diagnostics_channel.tracingChannel('my-channel');
*
* channels.unsubscribe({
* start(message) {
* // Handle start message
* },
* end(message) {
* // Handle end message
* },
* asyncStart(message) {
* // Handle asyncStart message
* },
* asyncEnd(message) {
* // Handle asyncEnd message
* },
* error(message) {
* // Handle error message
* },
* });
* ```
* @since v19.9.0
* @experimental
* @param subscribers Set of `TracingChannel Channels` subscribers
* @return `true` if all handlers were successfully unsubscribed, and `false` otherwise.
*/
unsubscribe(subscribers: TracingChannelSubscribers<ContextType>): void;
/**
* Trace a synchronous function call. This will always produce a `start event` and `end event` around the execution and may produce an `error event` if the given function throws an error.
* This will run the given function using `channel.runStores(context, ...)` on the `start` channel which ensures all
* events should have any bound stores set to match this trace context.
*
* To ensure only correct trace graphs are formed, events will only be published if subscribers are present prior to starting the trace. Subscriptions
* which are added after the trace begins will not receive future events from that trace, only future traces will be seen.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channels = diagnostics_channel.tracingChannel('my-channel');
*
* channels.traceSync(() => {
* // Do something
* }, {
* some: 'thing',
* });
* ```
* @since v19.9.0
* @experimental
* @param fn Function to wrap a trace around
* @param context Shared object to correlate events through
* @param thisArg The receiver to be used for the function call
* @param args Optional arguments to pass to the function
* @return The return value of the given function
*/
traceSync<ThisArg = any, Args extends any[] = any[], Result = any>(
fn: (this: ThisArg, ...args: Args) => Result,
context?: ContextType,
thisArg?: ThisArg,
...args: Args
): Result;
/**
* Trace a promise-returning function call. This will always produce a `start event` and `end event` around the synchronous portion of the
* function execution, and will produce an `asyncStart event` and `asyncEnd event` when a promise continuation is reached. It may also
* produce an `error event` if the given function throws an error or the
* returned promise rejects. This will run the given function using `channel.runStores(context, ...)` on the `start` channel which ensures all
* events should have any bound stores set to match this trace context.
*
* To ensure only correct trace graphs are formed, events will only be published if subscribers are present prior to starting the trace. Subscriptions
* which are added after the trace begins will not receive future events from that trace, only future traces will be seen.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channels = diagnostics_channel.tracingChannel('my-channel');
*
* channels.tracePromise(async () => {
* // Do something
* }, {
* some: 'thing',
* });
* ```
* @since v19.9.0
* @experimental
* @param fn Promise-returning function to wrap a trace around
* @param context Shared object to correlate trace events through
* @param thisArg The receiver to be used for the function call
* @param args Optional arguments to pass to the function
* @return Chained from promise returned by the given function
*/
tracePromise<ThisArg = any, Args extends any[] = any[], Result = any>(
fn: (this: ThisArg, ...args: Args) => Promise<Result>,
context?: ContextType,
thisArg?: ThisArg,
...args: Args
): Promise<Result>;
/**
* Trace a callback-receiving function call. This will always produce a `start event` and `end event` around the synchronous portion of the
* function execution, and will produce a `asyncStart event` and `asyncEnd event` around the callback execution. It may also produce an `error event` if the given function throws an error or
* the returned
* promise rejects. This will run the given function using `channel.runStores(context, ...)` on the `start` channel which ensures all
* events should have any bound stores set to match this trace context.
*
* The `position` will be -1 by default to indicate the final argument should
* be used as the callback.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
*
* const channels = diagnostics_channel.tracingChannel('my-channel');
*
* channels.traceCallback((arg1, callback) => {
* // Do something
* callback(null, 'result');
* }, 1, {
* some: 'thing',
* }, thisArg, arg1, callback);
* ```
*
* The callback will also be run with `channel.runStores(context, ...)` which
* enables context loss recovery in some cases.
*
* To ensure only correct trace graphs are formed, events will only be published if subscribers are present prior to starting the trace. Subscriptions
* which are added after the trace begins will not receive future events from that trace, only future traces will be seen.
*
* ```js
* import diagnostics_channel from 'node:diagnostics_channel';
* import { AsyncLocalStorage } from 'node:async_hooks';
*
* const channels = diagnostics_channel.tracingChannel('my-channel');
* const myStore = new AsyncLocalStorage();
*
* // The start channel sets the initial store data to something
* // and stores that store data value on the trace context object
* channels.start.bindStore(myStore, (data) => {
* const span = new Span(data);
* data.span = span;
* return span;
* });
*
* // Then asyncStart can restore from that data it stored previously
* channels.asyncStart.bindStore(myStore, (data) => {
* return data.span;
* });
* ```
* @since v19.9.0
* @experimental
* @param fn callback using function to wrap a trace around
* @param position Zero-indexed argument position of expected callback
* @param context Shared object to correlate trace events through
* @param thisArg The receiver to be used for the function call
* @param args Optional arguments to pass to the function
* @return The return value of the given function
*/
traceCallback<ThisArg = any, Args extends any[] = any[], Result = any>(
fn: (this: ThisArg, ...args: Args) => Result,
position?: number,
context?: ContextType,
thisArg?: ThisArg,
...args: Args
): Result;
/**
* `true` if any of the individual channels has a subscriber, `false` if not.
*
* This is a helper method available on a {@link TracingChannel} instance to check
* if any of the [TracingChannel Channels](https://nodejs.org/api/diagnostics_channel.html#tracingchannel-channels) have subscribers.
* A `true` is returned if any of them have at least one subscriber, a `false` is returned otherwise.
*
* ```js
* const diagnostics_channel = require('node:diagnostics_channel');
*
* const channels = diagnostics_channel.tracingChannel('my-channel');
*
* if (channels.hasSubscribers) {
* // Do something
* }
* ```
* @since v22.0.0, v20.13.0
*/
readonly hasSubscribers: boolean;
}
}
declare module "diagnostics_channel" {
export * from "node:diagnostics_channel";
}

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@ -0,0 +1,922 @@
/**
* The `node:dns` module enables name resolution. For example, use it to look up IP
* addresses of host names.
*
* Although named for the [Domain Name System (DNS)](https://en.wikipedia.org/wiki/Domain_Name_System), it does not always use the
* DNS protocol for lookups. {@link lookup} uses the operating system
* facilities to perform name resolution. It may not need to perform any network
* communication. To perform name resolution the way other applications on the same
* system do, use {@link lookup}.
*
* ```js
* import dns from 'node:dns';
*
* dns.lookup('example.org', (err, address, family) => {
* console.log('address: %j family: IPv%s', address, family);
* });
* // address: "93.184.216.34" family: IPv4
* ```
*
* All other functions in the `node:dns` module connect to an actual DNS server to
* perform name resolution. They will always use the network to perform DNS
* queries. These functions do not use the same set of configuration files used by {@link lookup} (e.g. `/etc/hosts`). Use these functions to always perform
* DNS queries, bypassing other name-resolution facilities.
*
* ```js
* import dns from 'node:dns';
*
* dns.resolve4('archive.org', (err, addresses) => {
* if (err) throw err;
*
* console.log(`addresses: ${JSON.stringify(addresses)}`);
*
* addresses.forEach((a) => {
* dns.reverse(a, (err, hostnames) => {
* if (err) {
* throw err;
* }
* console.log(`reverse for ${a}: ${JSON.stringify(hostnames)}`);
* });
* });
* });
* ```
*
* See the [Implementation considerations section](https://nodejs.org/docs/latest-v25.x/api/dns.html#implementation-considerations) for more information.
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/dns.js)
*/
declare module "node:dns" {
// Supported getaddrinfo flags.
/**
* Limits returned address types to the types of non-loopback addresses configured on the system. For example, IPv4 addresses are
* only returned if the current system has at least one IPv4 address configured.
*/
const ADDRCONFIG: number;
/**
* If the IPv6 family was specified, but no IPv6 addresses were found, then return IPv4 mapped IPv6 addresses. It is not supported
* on some operating systems (e.g. FreeBSD 10.1).
*/
const V4MAPPED: number;
/**
* If `dns.V4MAPPED` is specified, return resolved IPv6 addresses as
* well as IPv4 mapped IPv6 addresses.
*/
const ALL: number;
interface LookupOptions {
/**
* The record family. Must be `4`, `6`, or `0`. For backward compatibility reasons, `'IPv4'` and `'IPv6'` are interpreted
* as `4` and `6` respectively. The value 0 indicates that either an IPv4 or IPv6 address is returned. If the value `0` is used
* with `{ all: true } (see below)`, both IPv4 and IPv6 addresses are returned.
* @default 0
*/
family?: number | "IPv4" | "IPv6" | undefined;
/**
* One or more [supported `getaddrinfo`](https://nodejs.org/docs/latest-v25.x/api/dns.html#supported-getaddrinfo-flags) flags. Multiple flags may be
* passed by bitwise `OR`ing their values.
*/
hints?: number | undefined;
/**
* When `true`, the callback returns all resolved addresses in an array. Otherwise, returns a single address.
* @default false
*/
all?: boolean | undefined;
/**
* When `verbatim`, the resolved addresses are return unsorted. When `ipv4first`, the resolved addresses are sorted
* by placing IPv4 addresses before IPv6 addresses. When `ipv6first`, the resolved addresses are sorted by placing IPv6
* addresses before IPv4 addresses. Default value is configurable using
* {@link setDefaultResultOrder} or [`--dns-result-order`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--dns-result-orderorder).
* @default `verbatim` (addresses are not reordered)
* @since v22.1.0
*/
order?: "ipv4first" | "ipv6first" | "verbatim" | undefined;
/**
* When `true`, the callback receives IPv4 and IPv6 addresses in the order the DNS resolver returned them. When `false`, IPv4
* addresses are placed before IPv6 addresses. This option will be deprecated in favor of `order`. When both are specified,
* `order` has higher precedence. New code should only use `order`. Default value is configurable using {@link setDefaultResultOrder}
* @default true (addresses are not reordered)
* @deprecated Please use `order` option
*/
verbatim?: boolean | undefined;
}
interface LookupOneOptions extends LookupOptions {
all?: false | undefined;
}
interface LookupAllOptions extends LookupOptions {
all: true;
}
interface LookupAddress {
/**
* A string representation of an IPv4 or IPv6 address.
*/
address: string;
/**
* `4` or `6`, denoting the family of `address`, or `0` if the address is not an IPv4 or IPv6 address. `0` is a likely indicator of a
* bug in the name resolution service used by the operating system.
*/
family: number;
}
/**
* Resolves a host name (e.g. `'nodejs.org'`) into the first found A (IPv4) or
* AAAA (IPv6) record. All `option` properties are optional. If `options` is an
* integer, then it must be `4` or `6` – if `options` is `0` or not provided, then
* IPv4 and IPv6 addresses are both returned if found.
*
* With the `all` option set to `true`, the arguments for `callback` change to `(err, addresses)`, with `addresses` being an array of objects with the
* properties `address` and `family`.
*
* On error, `err` is an `Error` object, where `err.code` is the error code.
* Keep in mind that `err.code` will be set to `'ENOTFOUND'` not only when
* the host name does not exist but also when the lookup fails in other ways
* such as no available file descriptors.
*
* `dns.lookup()` does not necessarily have anything to do with the DNS protocol.
* The implementation uses an operating system facility that can associate names
* with addresses and vice versa. This implementation can have subtle but
* important consequences on the behavior of any Node.js program. Please take some
* time to consult the [Implementation considerations section](https://nodejs.org/docs/latest-v25.x/api/dns.html#implementation-considerations)
* before using `dns.lookup()`.
*
* Example usage:
*
* ```js
* import dns from 'node:dns';
* const options = {
* family: 6,
* hints: dns.ADDRCONFIG | dns.V4MAPPED,
* };
* dns.lookup('example.com', options, (err, address, family) =>
* console.log('address: %j family: IPv%s', address, family));
* // address: "2606:2800:220:1:248:1893:25c8:1946" family: IPv6
*
* // When options.all is true, the result will be an Array.
* options.all = true;
* dns.lookup('example.com', options, (err, addresses) =>
* console.log('addresses: %j', addresses));
* // addresses: [{"address":"2606:2800:220:1:248:1893:25c8:1946","family":6}]
* ```
*
* If this method is invoked as its [util.promisify()](https://nodejs.org/docs/latest-v25.x/api/util.html#utilpromisifyoriginal) ed
* version, and `all` is not set to `true`, it returns a `Promise` for an `Object` with `address` and `family` properties.
* @since v0.1.90
*/
function lookup(
hostname: string,
family: number,
callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void,
): void;
function lookup(
hostname: string,
options: LookupOneOptions,
callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void,
): void;
function lookup(
hostname: string,
options: LookupAllOptions,
callback: (err: NodeJS.ErrnoException | null, addresses: LookupAddress[]) => void,
): void;
function lookup(
hostname: string,
options: LookupOptions,
callback: (err: NodeJS.ErrnoException | null, address: string | LookupAddress[], family: number) => void,
): void;
function lookup(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void,
): void;
namespace lookup {
function __promisify__(hostname: string, options: LookupAllOptions): Promise<LookupAddress[]>;
function __promisify__(hostname: string, options?: LookupOneOptions | number): Promise<LookupAddress>;
function __promisify__(hostname: string, options: LookupOptions): Promise<LookupAddress | LookupAddress[]>;
}
/**
* Resolves the given `address` and `port` into a host name and service using
* the operating system's underlying `getnameinfo` implementation.
*
* If `address` is not a valid IP address, a `TypeError` will be thrown.
* The `port` will be coerced to a number. If it is not a legal port, a `TypeError` will be thrown.
*
* On an error, `err` is an [`Error`](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-error) object,
* where `err.code` is the error code.
*
* ```js
* import dns from 'node:dns';
* dns.lookupService('127.0.0.1', 22, (err, hostname, service) => {
* console.log(hostname, service);
* // Prints: localhost ssh
* });
* ```
*
* If this method is invoked as its [util.promisify()](https://nodejs.org/docs/latest-v25.x/api/util.html#utilpromisifyoriginal) ed
* version, it returns a `Promise` for an `Object` with `hostname` and `service` properties.
* @since v0.11.14
*/
function lookupService(
address: string,
port: number,
callback: (err: NodeJS.ErrnoException | null, hostname: string, service: string) => void,
): void;
namespace lookupService {
function __promisify__(
address: string,
port: number,
): Promise<{
hostname: string;
service: string;
}>;
}
interface ResolveOptions {
ttl: boolean;
}
interface ResolveWithTtlOptions extends ResolveOptions {
ttl: true;
}
interface RecordWithTtl {
address: string;
ttl: number;
}
interface AnyARecord extends RecordWithTtl {
type: "A";
}
interface AnyAaaaRecord extends RecordWithTtl {
type: "AAAA";
}
interface CaaRecord {
critical: number;
issue?: string | undefined;
issuewild?: string | undefined;
iodef?: string | undefined;
contactemail?: string | undefined;
contactphone?: string | undefined;
}
interface AnyCaaRecord extends CaaRecord {
type: "CAA";
}
interface MxRecord {
priority: number;
exchange: string;
}
interface AnyMxRecord extends MxRecord {
type: "MX";
}
interface NaptrRecord {
flags: string;
service: string;
regexp: string;
replacement: string;
order: number;
preference: number;
}
interface AnyNaptrRecord extends NaptrRecord {
type: "NAPTR";
}
interface SoaRecord {
nsname: string;
hostmaster: string;
serial: number;
refresh: number;
retry: number;
expire: number;
minttl: number;
}
interface AnySoaRecord extends SoaRecord {
type: "SOA";
}
interface SrvRecord {
priority: number;
weight: number;
port: number;
name: string;
}
interface AnySrvRecord extends SrvRecord {
type: "SRV";
}
interface TlsaRecord {
certUsage: number;
selector: number;
match: number;
data: ArrayBuffer;
}
interface AnyTlsaRecord extends TlsaRecord {
type: "TLSA";
}
interface AnyTxtRecord {
type: "TXT";
entries: string[];
}
interface AnyNsRecord {
type: "NS";
value: string;
}
interface AnyPtrRecord {
type: "PTR";
value: string;
}
interface AnyCnameRecord {
type: "CNAME";
value: string;
}
type AnyRecord =
| AnyARecord
| AnyAaaaRecord
| AnyCaaRecord
| AnyCnameRecord
| AnyMxRecord
| AnyNaptrRecord
| AnyNsRecord
| AnyPtrRecord
| AnySoaRecord
| AnySrvRecord
| AnyTlsaRecord
| AnyTxtRecord;
/**
* Uses the DNS protocol to resolve a host name (e.g. `'nodejs.org'`) into an array
* of the resource records. The `callback` function has arguments `(err, records)`. When successful, `records` will be an array of resource
* records. The type and structure of individual results varies based on `rrtype`:
*
* <omitted>
*
* On error, `err` is an [`Error`](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-error) object,
* where `err.code` is one of the `DNS error codes`.
* @since v0.1.27
* @param hostname Host name to resolve.
* @param [rrtype='A'] Resource record type.
*/
function resolve(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
): void;
function resolve(
hostname: string,
rrtype: "A" | "AAAA" | "CNAME" | "NS" | "PTR",
callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
): void;
function resolve(
hostname: string,
rrtype: "ANY",
callback: (err: NodeJS.ErrnoException | null, addresses: AnyRecord[]) => void,
): void;
function resolve(
hostname: string,
rrtype: "CAA",
callback: (err: NodeJS.ErrnoException | null, address: CaaRecord[]) => void,
): void;
function resolve(
hostname: string,
rrtype: "MX",
callback: (err: NodeJS.ErrnoException | null, addresses: MxRecord[]) => void,
): void;
function resolve(
hostname: string,
rrtype: "NAPTR",
callback: (err: NodeJS.ErrnoException | null, addresses: NaptrRecord[]) => void,
): void;
function resolve(
hostname: string,
rrtype: "SOA",
callback: (err: NodeJS.ErrnoException | null, addresses: SoaRecord) => void,
): void;
function resolve(
hostname: string,
rrtype: "SRV",
callback: (err: NodeJS.ErrnoException | null, addresses: SrvRecord[]) => void,
): void;
function resolve(
hostname: string,
rrtype: "TLSA",
callback: (err: NodeJS.ErrnoException | null, addresses: TlsaRecord[]) => void,
): void;
function resolve(
hostname: string,
rrtype: "TXT",
callback: (err: NodeJS.ErrnoException | null, addresses: string[][]) => void,
): void;
function resolve(
hostname: string,
rrtype: string,
callback: (
err: NodeJS.ErrnoException | null,
addresses:
| string[]
| CaaRecord[]
| MxRecord[]
| NaptrRecord[]
| SoaRecord
| SrvRecord[]
| TlsaRecord[]
| string[][]
| AnyRecord[],
) => void,
): void;
namespace resolve {
function __promisify__(hostname: string, rrtype?: "A" | "AAAA" | "CNAME" | "NS" | "PTR"): Promise<string[]>;
function __promisify__(hostname: string, rrtype: "ANY"): Promise<AnyRecord[]>;
function __promisify__(hostname: string, rrtype: "CAA"): Promise<CaaRecord[]>;
function __promisify__(hostname: string, rrtype: "MX"): Promise<MxRecord[]>;
function __promisify__(hostname: string, rrtype: "NAPTR"): Promise<NaptrRecord[]>;
function __promisify__(hostname: string, rrtype: "SOA"): Promise<SoaRecord>;
function __promisify__(hostname: string, rrtype: "SRV"): Promise<SrvRecord[]>;
function __promisify__(hostname: string, rrtype: "TLSA"): Promise<TlsaRecord[]>;
function __promisify__(hostname: string, rrtype: "TXT"): Promise<string[][]>;
function __promisify__(
hostname: string,
rrtype: string,
): Promise<
| string[]
| CaaRecord[]
| MxRecord[]
| NaptrRecord[]
| SoaRecord
| SrvRecord[]
| TlsaRecord[]
| string[][]
| AnyRecord[]
>;
}
/**
* Uses the DNS protocol to resolve a IPv4 addresses (`A` records) for the `hostname`. The `addresses` argument passed to the `callback` function
* will contain an array of IPv4 addresses (e.g.`['74.125.79.104', '74.125.79.105', '74.125.79.106']`).
* @since v0.1.16
* @param hostname Host name to resolve.
*/
function resolve4(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
): void;
function resolve4(
hostname: string,
options: ResolveWithTtlOptions,
callback: (err: NodeJS.ErrnoException | null, addresses: RecordWithTtl[]) => void,
): void;
function resolve4(
hostname: string,
options: ResolveOptions,
callback: (err: NodeJS.ErrnoException | null, addresses: string[] | RecordWithTtl[]) => void,
): void;
namespace resolve4 {
function __promisify__(hostname: string): Promise<string[]>;
function __promisify__(hostname: string, options: ResolveWithTtlOptions): Promise<RecordWithTtl[]>;
function __promisify__(hostname: string, options?: ResolveOptions): Promise<string[] | RecordWithTtl[]>;
}
/**
* Uses the DNS protocol to resolve IPv6 addresses (`AAAA` records) for the `hostname`. The `addresses` argument passed to the `callback` function
* will contain an array of IPv6 addresses.
* @since v0.1.16
* @param hostname Host name to resolve.
*/
function resolve6(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
): void;
function resolve6(
hostname: string,
options: ResolveWithTtlOptions,
callback: (err: NodeJS.ErrnoException | null, addresses: RecordWithTtl[]) => void,
): void;
function resolve6(
hostname: string,
options: ResolveOptions,
callback: (err: NodeJS.ErrnoException | null, addresses: string[] | RecordWithTtl[]) => void,
): void;
namespace resolve6 {
function __promisify__(hostname: string): Promise<string[]>;
function __promisify__(hostname: string, options: ResolveWithTtlOptions): Promise<RecordWithTtl[]>;
function __promisify__(hostname: string, options?: ResolveOptions): Promise<string[] | RecordWithTtl[]>;
}
/**
* Uses the DNS protocol to resolve `CNAME` records for the `hostname`. The `addresses` argument passed to the `callback` function
* will contain an array of canonical name records available for the `hostname` (e.g. `['bar.example.com']`).
* @since v0.3.2
*/
function resolveCname(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
): void;
namespace resolveCname {
function __promisify__(hostname: string): Promise<string[]>;
}
/**
* Uses the DNS protocol to resolve `CAA` records for the `hostname`. The `addresses` argument passed to the `callback` function
* will contain an array of certification authority authorization records
* available for the `hostname` (e.g. `[{critical: 0, iodef: 'mailto:pki@example.com'}, {critical: 128, issue: 'pki.example.com'}]`).
* @since v15.0.0, v14.17.0
*/
function resolveCaa(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, records: CaaRecord[]) => void,
): void;
namespace resolveCaa {
function __promisify__(hostname: string): Promise<CaaRecord[]>;
}
/**
* Uses the DNS protocol to resolve mail exchange records (`MX` records) for the `hostname`. The `addresses` argument passed to the `callback` function will
* contain an array of objects containing both a `priority` and `exchange` property (e.g. `[{priority: 10, exchange: 'mx.example.com'}, ...]`).
* @since v0.1.27
*/
function resolveMx(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: MxRecord[]) => void,
): void;
namespace resolveMx {
function __promisify__(hostname: string): Promise<MxRecord[]>;
}
/**
* Uses the DNS protocol to resolve regular expression-based records (`NAPTR` records) for the `hostname`. The `addresses` argument passed to the `callback` function will contain an array of
* objects with the following properties:
*
* * `flags`
* * `service`
* * `regexp`
* * `replacement`
* * `order`
* * `preference`
*
* ```js
* {
* flags: 's',
* service: 'SIP+D2U',
* regexp: '',
* replacement: '_sip._udp.example.com',
* order: 30,
* preference: 100
* }
* ```
* @since v0.9.12
*/
function resolveNaptr(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: NaptrRecord[]) => void,
): void;
namespace resolveNaptr {
function __promisify__(hostname: string): Promise<NaptrRecord[]>;
}
/**
* Uses the DNS protocol to resolve name server records (`NS` records) for the `hostname`. The `addresses` argument passed to the `callback` function will
* contain an array of name server records available for `hostname` (e.g. `['ns1.example.com', 'ns2.example.com']`).
* @since v0.1.90
*/
function resolveNs(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
): void;
namespace resolveNs {
function __promisify__(hostname: string): Promise<string[]>;
}
/**
* Uses the DNS protocol to resolve pointer records (`PTR` records) for the `hostname`. The `addresses` argument passed to the `callback` function will
* be an array of strings containing the reply records.
* @since v6.0.0
*/
function resolvePtr(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
): void;
namespace resolvePtr {
function __promisify__(hostname: string): Promise<string[]>;
}
/**
* Uses the DNS protocol to resolve a start of authority record (`SOA` record) for
* the `hostname`. The `address` argument passed to the `callback` function will
* be an object with the following properties:
*
* * `nsname`
* * `hostmaster`
* * `serial`
* * `refresh`
* * `retry`
* * `expire`
* * `minttl`
*
* ```js
* {
* nsname: 'ns.example.com',
* hostmaster: 'root.example.com',
* serial: 2013101809,
* refresh: 10000,
* retry: 2400,
* expire: 604800,
* minttl: 3600
* }
* ```
* @since v0.11.10
*/
function resolveSoa(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, address: SoaRecord) => void,
): void;
namespace resolveSoa {
function __promisify__(hostname: string): Promise<SoaRecord>;
}
/**
* Uses the DNS protocol to resolve service records (`SRV` records) for the `hostname`. The `addresses` argument passed to the `callback` function will
* be an array of objects with the following properties:
*
* * `priority`
* * `weight`
* * `port`
* * `name`
*
* ```js
* {
* priority: 10,
* weight: 5,
* port: 21223,
* name: 'service.example.com'
* }
* ```
* @since v0.1.27
*/
function resolveSrv(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: SrvRecord[]) => void,
): void;
namespace resolveSrv {
function __promisify__(hostname: string): Promise<SrvRecord[]>;
}
/**
* Uses the DNS protocol to resolve certificate associations (`TLSA` records) for
* the `hostname`. The `records` argument passed to the `callback` function is an
* array of objects with these properties:
*
* * `certUsage`
* * `selector`
* * `match`
* * `data`
*
* ```js
* {
* certUsage: 3,
* selector: 1,
* match: 1,
* data: [ArrayBuffer]
* }
* ```
* @since v23.9.0, v22.15.0
*/
function resolveTlsa(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: TlsaRecord[]) => void,
): void;
namespace resolveTlsa {
function __promisify__(hostname: string): Promise<TlsaRecord[]>;
}
/**
* Uses the DNS protocol to resolve text queries (`TXT` records) for the `hostname`. The `records` argument passed to the `callback` function is a
* two-dimensional array of the text records available for `hostname` (e.g.`[ ['v=spf1 ip4:0.0.0.0 ', '~all' ] ]`). Each sub-array contains TXT chunks of
* one record. Depending on the use case, these could be either joined together or
* treated separately.
* @since v0.1.27
*/
function resolveTxt(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: string[][]) => void,
): void;
namespace resolveTxt {
function __promisify__(hostname: string): Promise<string[][]>;
}
/**
* Uses the DNS protocol to resolve all records (also known as `ANY` or `*` query).
* The `ret` argument passed to the `callback` function will be an array containing
* various types of records. Each object has a property `type` that indicates the
* type of the current record. And depending on the `type`, additional properties
* will be present on the object:
*
* <omitted>
*
* Here is an example of the `ret` object passed to the callback:
*
* ```js
* [ { type: 'A', address: '127.0.0.1', ttl: 299 },
* { type: 'CNAME', value: 'example.com' },
* { type: 'MX', exchange: 'alt4.aspmx.l.example.com', priority: 50 },
* { type: 'NS', value: 'ns1.example.com' },
* { type: 'TXT', entries: [ 'v=spf1 include:_spf.example.com ~all' ] },
* { type: 'SOA',
* nsname: 'ns1.example.com',
* hostmaster: 'admin.example.com',
* serial: 156696742,
* refresh: 900,
* retry: 900,
* expire: 1800,
* minttl: 60 } ]
* ```
*
* DNS server operators may choose not to respond to `ANY` queries. It may be better to call individual methods like {@link resolve4}, {@link resolveMx}, and so on. For more details, see
* [RFC 8482](https://tools.ietf.org/html/rfc8482).
*/
function resolveAny(
hostname: string,
callback: (err: NodeJS.ErrnoException | null, addresses: AnyRecord[]) => void,
): void;
namespace resolveAny {
function __promisify__(hostname: string): Promise<AnyRecord[]>;
}
/**
* Performs a reverse DNS query that resolves an IPv4 or IPv6 address to an
* array of host names.
*
* On error, `err` is an [`Error`](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-error) object, where `err.code` is
* one of the [DNS error codes](https://nodejs.org/docs/latest-v25.x/api/dns.html#error-codes).
* @since v0.1.16
*/
function reverse(
ip: string,
callback: (err: NodeJS.ErrnoException | null, hostnames: string[]) => void,
): void;
/**
* Get the default value for `order` in {@link lookup} and [`dnsPromises.lookup()`](https://nodejs.org/docs/latest-v25.x/api/dns.html#dnspromiseslookuphostname-options).
* The value could be:
*
* * `ipv4first`: for `order` defaulting to `ipv4first`.
* * `ipv6first`: for `order` defaulting to `ipv6first`.
* * `verbatim`: for `order` defaulting to `verbatim`.
* @since v18.17.0
*/
function getDefaultResultOrder(): "ipv4first" | "ipv6first" | "verbatim";
/**
* Sets the IP address and port of servers to be used when performing DNS
* resolution. The `servers` argument is an array of [RFC 5952](https://tools.ietf.org/html/rfc5952#section-6) formatted
* addresses. If the port is the IANA default DNS port (53) it can be omitted.
*
* ```js
* dns.setServers([
* '4.4.4.4',
* '[2001:4860:4860::8888]',
* '4.4.4.4:1053',
* '[2001:4860:4860::8888]:1053',
* ]);
* ```
*
* An error will be thrown if an invalid address is provided.
*
* The `dns.setServers()` method must not be called while a DNS query is in
* progress.
*
* The {@link setServers} method affects only {@link resolve}, `dns.resolve*()` and {@link reverse} (and specifically _not_ {@link lookup}).
*
* This method works much like [resolve.conf](https://man7.org/linux/man-pages/man5/resolv.conf.5.html).
* That is, if attempting to resolve with the first server provided results in a `NOTFOUND` error, the `resolve()` method will _not_ attempt to resolve with
* subsequent servers provided. Fallback DNS servers will only be used if the
* earlier ones time out or result in some other error.
* @since v0.11.3
* @param servers array of [RFC 5952](https://datatracker.ietf.org/doc/html/rfc5952#section-6) formatted addresses
*/
function setServers(servers: readonly string[]): void;
/**
* Returns an array of IP address strings, formatted according to [RFC 5952](https://tools.ietf.org/html/rfc5952#section-6),
* that are currently configured for DNS resolution. A string will include a port
* section if a custom port is used.
*
* ```js
* [
* '4.4.4.4',
* '2001:4860:4860::8888',
* '4.4.4.4:1053',
* '[2001:4860:4860::8888]:1053',
* ]
* ```
* @since v0.11.3
*/
function getServers(): string[];
/**
* Set the default value of `order` in {@link lookup} and [`dnsPromises.lookup()`](https://nodejs.org/docs/latest-v25.x/api/dns.html#dnspromiseslookuphostname-options).
* The value could be:
*
* * `ipv4first`: sets default `order` to `ipv4first`.
* * `ipv6first`: sets default `order` to `ipv6first`.
* * `verbatim`: sets default `order` to `verbatim`.
*
* The default is `verbatim` and {@link setDefaultResultOrder} have higher
* priority than [`--dns-result-order`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--dns-result-orderorder). When using
* [worker threads](https://nodejs.org/docs/latest-v25.x/api/worker_threads.html), {@link setDefaultResultOrder} from the main
* thread won't affect the default dns orders in workers.
* @since v16.4.0, v14.18.0
* @param order must be `'ipv4first'`, `'ipv6first'` or `'verbatim'`.
*/
function setDefaultResultOrder(order: "ipv4first" | "ipv6first" | "verbatim"): void;
// Error codes
const NODATA: "ENODATA";
const FORMERR: "EFORMERR";
const SERVFAIL: "ESERVFAIL";
const NOTFOUND: "ENOTFOUND";
const NOTIMP: "ENOTIMP";
const REFUSED: "EREFUSED";
const BADQUERY: "EBADQUERY";
const BADNAME: "EBADNAME";
const BADFAMILY: "EBADFAMILY";
const BADRESP: "EBADRESP";
const CONNREFUSED: "ECONNREFUSED";
const TIMEOUT: "ETIMEOUT";
const EOF: "EOF";
const FILE: "EFILE";
const NOMEM: "ENOMEM";
const DESTRUCTION: "EDESTRUCTION";
const BADSTR: "EBADSTR";
const BADFLAGS: "EBADFLAGS";
const NONAME: "ENONAME";
const BADHINTS: "EBADHINTS";
const NOTINITIALIZED: "ENOTINITIALIZED";
const LOADIPHLPAPI: "ELOADIPHLPAPI";
const ADDRGETNETWORKPARAMS: "EADDRGETNETWORKPARAMS";
const CANCELLED: "ECANCELLED";
interface ResolverOptions {
/**
* Query timeout in milliseconds, or `-1` to use the default timeout.
*/
timeout?: number | undefined;
/**
* The number of tries the resolver will try contacting each name server before giving up.
* @default 4
*/
tries?: number | undefined;
/**
* The max retry timeout, in milliseconds.
* @default 0
*/
maxTimeout?: number | undefined;
}
/**
* An independent resolver for DNS requests.
*
* Creating a new resolver uses the default server settings. Setting
* the servers used for a resolver using [`resolver.setServers()`](https://nodejs.org/docs/latest-v25.x/api/dns.html#dnssetserversservers) does not affect
* other resolvers:
*
* ```js
* import { Resolver } from 'node:dns';
* const resolver = new Resolver();
* resolver.setServers(['4.4.4.4']);
*
* // This request will use the server at 4.4.4.4, independent of global settings.
* resolver.resolve4('example.org', (err, addresses) => {
* // ...
* });
* ```
*
* The following methods from the `node:dns` module are available:
*
* * `resolver.getServers()`
* * `resolver.resolve()`
* * `resolver.resolve4()`
* * `resolver.resolve6()`
* * `resolver.resolveAny()`
* * `resolver.resolveCaa()`
* * `resolver.resolveCname()`
* * `resolver.resolveMx()`
* * `resolver.resolveNaptr()`
* * `resolver.resolveNs()`
* * `resolver.resolvePtr()`
* * `resolver.resolveSoa()`
* * `resolver.resolveSrv()`
* * `resolver.resolveTxt()`
* * `resolver.reverse()`
* * `resolver.setServers()`
* @since v8.3.0
*/
class Resolver {
constructor(options?: ResolverOptions);
/**
* Cancel all outstanding DNS queries made by this resolver. The corresponding
* callbacks will be called with an error with code `ECANCELLED`.
* @since v8.3.0
*/
cancel(): void;
getServers: typeof getServers;
resolve: typeof resolve;
resolve4: typeof resolve4;
resolve6: typeof resolve6;
resolveAny: typeof resolveAny;
resolveCaa: typeof resolveCaa;
resolveCname: typeof resolveCname;
resolveMx: typeof resolveMx;
resolveNaptr: typeof resolveNaptr;
resolveNs: typeof resolveNs;
resolvePtr: typeof resolvePtr;
resolveSoa: typeof resolveSoa;
resolveSrv: typeof resolveSrv;
resolveTlsa: typeof resolveTlsa;
resolveTxt: typeof resolveTxt;
reverse: typeof reverse;
/**
* The resolver instance will send its requests from the specified IP address.
* This allows programs to specify outbound interfaces when used on multi-homed
* systems.
*
* If a v4 or v6 address is not specified, it is set to the default and the
* operating system will choose a local address automatically.
*
* The resolver will use the v4 local address when making requests to IPv4 DNS
* servers, and the v6 local address when making requests to IPv6 DNS servers.
* The `rrtype` of resolution requests has no impact on the local address used.
* @since v15.1.0, v14.17.0
* @param [ipv4='0.0.0.0'] A string representation of an IPv4 address.
* @param [ipv6='::0'] A string representation of an IPv6 address.
*/
setLocalAddress(ipv4?: string, ipv6?: string): void;
setServers: typeof setServers;
}
}
declare module "node:dns" {
export * as promises from "node:dns/promises";
}
declare module "dns" {
export * from "node:dns";
}

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/**
* The `dns.promises` API provides an alternative set of asynchronous DNS methods
* that return `Promise` objects rather than using callbacks. The API is accessible
* via `import { promises as dnsPromises } from 'node:dns'` or `import dnsPromises from 'node:dns/promises'`.
* @since v10.6.0
*/
declare module "node:dns/promises" {
import {
AnyRecord,
CaaRecord,
LookupAddress,
LookupAllOptions,
LookupOneOptions,
LookupOptions,
MxRecord,
NaptrRecord,
RecordWithTtl,
ResolveOptions,
ResolverOptions,
ResolveWithTtlOptions,
SoaRecord,
SrvRecord,
TlsaRecord,
} from "node:dns";
/**
* Returns an array of IP address strings, formatted according to [RFC 5952](https://tools.ietf.org/html/rfc5952#section-6),
* that are currently configured for DNS resolution. A string will include a port
* section if a custom port is used.
*
* ```js
* [
* '4.4.4.4',
* '2001:4860:4860::8888',
* '4.4.4.4:1053',
* '[2001:4860:4860::8888]:1053',
* ]
* ```
* @since v10.6.0
*/
function getServers(): string[];
/**
* Resolves a host name (e.g. `'nodejs.org'`) into the first found A (IPv4) or
* AAAA (IPv6) record. All `option` properties are optional. If `options` is an
* integer, then it must be `4` or `6` – if `options` is not provided, then IPv4
* and IPv6 addresses are both returned if found.
*
* With the `all` option set to `true`, the `Promise` is resolved with `addresses` being an array of objects with the properties `address` and `family`.
*
* On error, the `Promise` is rejected with an [`Error`](https://nodejs.org/docs/latest-v20.x/api/errors.html#class-error) object, where `err.code` is the error code.
* Keep in mind that `err.code` will be set to `'ENOTFOUND'` not only when
* the host name does not exist but also when the lookup fails in other ways
* such as no available file descriptors.
*
* [`dnsPromises.lookup()`](https://nodejs.org/docs/latest-v20.x/api/dns.html#dnspromiseslookuphostname-options) does not necessarily have anything to do with the DNS
* protocol. The implementation uses an operating system facility that can
* associate names with addresses and vice versa. This implementation can have
* subtle but important consequences on the behavior of any Node.js program. Please
* take some time to consult the [Implementation considerations section](https://nodejs.org/docs/latest-v20.x/api/dns.html#implementation-considerations) before
* using `dnsPromises.lookup()`.
*
* Example usage:
*
* ```js
* import dns from 'node:dns';
* const dnsPromises = dns.promises;
* const options = {
* family: 6,
* hints: dns.ADDRCONFIG | dns.V4MAPPED,
* };
*
* dnsPromises.lookup('example.com', options).then((result) => {
* console.log('address: %j family: IPv%s', result.address, result.family);
* // address: "2606:2800:220:1:248:1893:25c8:1946" family: IPv6
* });
*
* // When options.all is true, the result will be an Array.
* options.all = true;
* dnsPromises.lookup('example.com', options).then((result) => {
* console.log('addresses: %j', result);
* // addresses: [{"address":"2606:2800:220:1:248:1893:25c8:1946","family":6}]
* });
* ```
* @since v10.6.0
*/
function lookup(hostname: string, family: number): Promise<LookupAddress>;
function lookup(hostname: string, options: LookupOneOptions): Promise<LookupAddress>;
function lookup(hostname: string, options: LookupAllOptions): Promise<LookupAddress[]>;
function lookup(hostname: string, options: LookupOptions): Promise<LookupAddress | LookupAddress[]>;
function lookup(hostname: string): Promise<LookupAddress>;
/**
* Resolves the given `address` and `port` into a host name and service using
* the operating system's underlying `getnameinfo` implementation.
*
* If `address` is not a valid IP address, a `TypeError` will be thrown.
* The `port` will be coerced to a number. If it is not a legal port, a `TypeError` will be thrown.
*
* On error, the `Promise` is rejected with an [`Error`](https://nodejs.org/docs/latest-v20.x/api/errors.html#class-error) object, where `err.code` is the error code.
*
* ```js
* import dnsPromises from 'node:dns';
* dnsPromises.lookupService('127.0.0.1', 22).then((result) => {
* console.log(result.hostname, result.service);
* // Prints: localhost ssh
* });
* ```
* @since v10.6.0
*/
function lookupService(
address: string,
port: number,
): Promise<{
hostname: string;
service: string;
}>;
/**
* Uses the DNS protocol to resolve a host name (e.g. `'nodejs.org'`) into an array
* of the resource records. When successful, the `Promise` is resolved with an
* array of resource records. The type and structure of individual results vary
* based on `rrtype`:
*
* <omitted>
*
* On error, the `Promise` is rejected with an [`Error`](https://nodejs.org/docs/latest-v20.x/api/errors.html#class-error) object, where `err.code`
* is one of the [DNS error codes](https://nodejs.org/docs/latest-v20.x/api/dns.html#error-codes).
* @since v10.6.0
* @param hostname Host name to resolve.
* @param [rrtype='A'] Resource record type.
*/
function resolve(hostname: string): Promise<string[]>;
function resolve(hostname: string, rrtype: "A" | "AAAA" | "CNAME" | "NS" | "PTR"): Promise<string[]>;
function resolve(hostname: string, rrtype: "ANY"): Promise<AnyRecord[]>;
function resolve(hostname: string, rrtype: "CAA"): Promise<CaaRecord[]>;
function resolve(hostname: string, rrtype: "MX"): Promise<MxRecord[]>;
function resolve(hostname: string, rrtype: "NAPTR"): Promise<NaptrRecord[]>;
function resolve(hostname: string, rrtype: "SOA"): Promise<SoaRecord>;
function resolve(hostname: string, rrtype: "SRV"): Promise<SrvRecord[]>;
function resolve(hostname: string, rrtype: "TLSA"): Promise<TlsaRecord[]>;
function resolve(hostname: string, rrtype: "TXT"): Promise<string[][]>;
function resolve(hostname: string, rrtype: string): Promise<
| string[]
| CaaRecord[]
| MxRecord[]
| NaptrRecord[]
| SoaRecord
| SrvRecord[]
| TlsaRecord[]
| string[][]
| AnyRecord[]
>;
/**
* Uses the DNS protocol to resolve IPv4 addresses (`A` records) for the `hostname`. On success, the `Promise` is resolved with an array of IPv4
* addresses (e.g. `['74.125.79.104', '74.125.79.105', '74.125.79.106']`).
* @since v10.6.0
* @param hostname Host name to resolve.
*/
function resolve4(hostname: string): Promise<string[]>;
function resolve4(hostname: string, options: ResolveWithTtlOptions): Promise<RecordWithTtl[]>;
function resolve4(hostname: string, options: ResolveOptions): Promise<string[] | RecordWithTtl[]>;
/**
* Uses the DNS protocol to resolve IPv6 addresses (`AAAA` records) for the `hostname`. On success, the `Promise` is resolved with an array of IPv6
* addresses.
* @since v10.6.0
* @param hostname Host name to resolve.
*/
function resolve6(hostname: string): Promise<string[]>;
function resolve6(hostname: string, options: ResolveWithTtlOptions): Promise<RecordWithTtl[]>;
function resolve6(hostname: string, options: ResolveOptions): Promise<string[] | RecordWithTtl[]>;
/**
* Uses the DNS protocol to resolve all records (also known as `ANY` or `*` query).
* On success, the `Promise` is resolved with an array containing various types of
* records. Each object has a property `type` that indicates the type of the
* current record. And depending on the `type`, additional properties will be
* present on the object:
*
* <omitted>
*
* Here is an example of the result object:
*
* ```js
* [ { type: 'A', address: '127.0.0.1', ttl: 299 },
* { type: 'CNAME', value: 'example.com' },
* { type: 'MX', exchange: 'alt4.aspmx.l.example.com', priority: 50 },
* { type: 'NS', value: 'ns1.example.com' },
* { type: 'TXT', entries: [ 'v=spf1 include:_spf.example.com ~all' ] },
* { type: 'SOA',
* nsname: 'ns1.example.com',
* hostmaster: 'admin.example.com',
* serial: 156696742,
* refresh: 900,
* retry: 900,
* expire: 1800,
* minttl: 60 } ]
* ```
* @since v10.6.0
*/
function resolveAny(hostname: string): Promise<AnyRecord[]>;
/**
* Uses the DNS protocol to resolve `CAA` records for the `hostname`. On success,
* the `Promise` is resolved with an array of objects containing available
* certification authority authorization records available for the `hostname` (e.g. `[{critical: 0, iodef: 'mailto:pki@example.com'},{critical: 128, issue: 'pki.example.com'}]`).
* @since v15.0.0, v14.17.0
*/
function resolveCaa(hostname: string): Promise<CaaRecord[]>;
/**
* Uses the DNS protocol to resolve `CNAME` records for the `hostname`. On success,
* the `Promise` is resolved with an array of canonical name records available for
* the `hostname` (e.g. `['bar.example.com']`).
* @since v10.6.0
*/
function resolveCname(hostname: string): Promise<string[]>;
/**
* Uses the DNS protocol to resolve mail exchange records (`MX` records) for the `hostname`. On success, the `Promise` is resolved with an array of objects
* containing both a `priority` and `exchange` property (e.g.`[{priority: 10, exchange: 'mx.example.com'}, ...]`).
* @since v10.6.0
*/
function resolveMx(hostname: string): Promise<MxRecord[]>;
/**
* Uses the DNS protocol to resolve regular expression-based records (`NAPTR` records) for the `hostname`. On success, the `Promise` is resolved with an array
* of objects with the following properties:
*
* * `flags`
* * `service`
* * `regexp`
* * `replacement`
* * `order`
* * `preference`
*
* ```js
* {
* flags: 's',
* service: 'SIP+D2U',
* regexp: '',
* replacement: '_sip._udp.example.com',
* order: 30,
* preference: 100
* }
* ```
* @since v10.6.0
*/
function resolveNaptr(hostname: string): Promise<NaptrRecord[]>;
/**
* Uses the DNS protocol to resolve name server records (`NS` records) for the `hostname`. On success, the `Promise` is resolved with an array of name server
* records available for `hostname` (e.g.`['ns1.example.com', 'ns2.example.com']`).
* @since v10.6.0
*/
function resolveNs(hostname: string): Promise<string[]>;
/**
* Uses the DNS protocol to resolve pointer records (`PTR` records) for the `hostname`. On success, the `Promise` is resolved with an array of strings
* containing the reply records.
* @since v10.6.0
*/
function resolvePtr(hostname: string): Promise<string[]>;
/**
* Uses the DNS protocol to resolve a start of authority record (`SOA` record) for
* the `hostname`. On success, the `Promise` is resolved with an object with the
* following properties:
*
* * `nsname`
* * `hostmaster`
* * `serial`
* * `refresh`
* * `retry`
* * `expire`
* * `minttl`
*
* ```js
* {
* nsname: 'ns.example.com',
* hostmaster: 'root.example.com',
* serial: 2013101809,
* refresh: 10000,
* retry: 2400,
* expire: 604800,
* minttl: 3600
* }
* ```
* @since v10.6.0
*/
function resolveSoa(hostname: string): Promise<SoaRecord>;
/**
* Uses the DNS protocol to resolve service records (`SRV` records) for the `hostname`. On success, the `Promise` is resolved with an array of objects with
* the following properties:
*
* * `priority`
* * `weight`
* * `port`
* * `name`
*
* ```js
* {
* priority: 10,
* weight: 5,
* port: 21223,
* name: 'service.example.com'
* }
* ```
* @since v10.6.0
*/
function resolveSrv(hostname: string): Promise<SrvRecord[]>;
/**
* Uses the DNS protocol to resolve certificate associations (`TLSA` records) for
* the `hostname`. On success, the `Promise` is resolved with an array of objectsAdd commentMore actions
* with these properties:
*
* * `certUsage`
* * `selector`
* * `match`
* * `data`
*
* ```js
* {
* certUsage: 3,
* selector: 1,
* match: 1,
* data: [ArrayBuffer]
* }
* ```
* @since v23.9.0, v22.15.0
*/
function resolveTlsa(hostname: string): Promise<TlsaRecord[]>;
/**
* Uses the DNS protocol to resolve text queries (`TXT` records) for the `hostname`. On success, the `Promise` is resolved with a two-dimensional array
* of the text records available for `hostname` (e.g.`[ ['v=spf1 ip4:0.0.0.0 ', '~all' ] ]`). Each sub-array contains TXT chunks of
* one record. Depending on the use case, these could be either joined together or
* treated separately.
* @since v10.6.0
*/
function resolveTxt(hostname: string): Promise<string[][]>;
/**
* Performs a reverse DNS query that resolves an IPv4 or IPv6 address to an
* array of host names.
*
* On error, the `Promise` is rejected with an [`Error`](https://nodejs.org/docs/latest-v20.x/api/errors.html#class-error) object, where `err.code`
* is one of the [DNS error codes](https://nodejs.org/docs/latest-v20.x/api/dns.html#error-codes).
* @since v10.6.0
*/
function reverse(ip: string): Promise<string[]>;
/**
* Get the default value for `verbatim` in {@link lookup} and [dnsPromises.lookup()](https://nodejs.org/docs/latest-v20.x/api/dns.html#dnspromiseslookuphostname-options).
* The value could be:
*
* * `ipv4first`: for `verbatim` defaulting to `false`.
* * `verbatim`: for `verbatim` defaulting to `true`.
* @since v20.1.0
*/
function getDefaultResultOrder(): "ipv4first" | "verbatim";
/**
* Sets the IP address and port of servers to be used when performing DNS
* resolution. The `servers` argument is an array of [RFC 5952](https://tools.ietf.org/html/rfc5952#section-6) formatted
* addresses. If the port is the IANA default DNS port (53) it can be omitted.
*
* ```js
* dnsPromises.setServers([
* '4.4.4.4',
* '[2001:4860:4860::8888]',
* '4.4.4.4:1053',
* '[2001:4860:4860::8888]:1053',
* ]);
* ```
*
* An error will be thrown if an invalid address is provided.
*
* The `dnsPromises.setServers()` method must not be called while a DNS query is in
* progress.
*
* This method works much like [resolve.conf](https://man7.org/linux/man-pages/man5/resolv.conf.5.html).
* That is, if attempting to resolve with the first server provided results in a `NOTFOUND` error, the `resolve()` method will _not_ attempt to resolve with
* subsequent servers provided. Fallback DNS servers will only be used if the
* earlier ones time out or result in some other error.
* @since v10.6.0
* @param servers array of `RFC 5952` formatted addresses
*/
function setServers(servers: readonly string[]): void;
/**
* Set the default value of `order` in `dns.lookup()` and `{@link lookup}`. The value could be:
*
* * `ipv4first`: sets default `order` to `ipv4first`.
* * `ipv6first`: sets default `order` to `ipv6first`.
* * `verbatim`: sets default `order` to `verbatim`.
*
* The default is `verbatim` and [dnsPromises.setDefaultResultOrder()](https://nodejs.org/docs/latest-v20.x/api/dns.html#dnspromisessetdefaultresultorderorder)
* have higher priority than [`--dns-result-order`](https://nodejs.org/docs/latest-v20.x/api/cli.html#--dns-result-orderorder).
* When using [worker threads](https://nodejs.org/docs/latest-v20.x/api/worker_threads.html), [`dnsPromises.setDefaultResultOrder()`](https://nodejs.org/docs/latest-v20.x/api/dns.html#dnspromisessetdefaultresultorderorder)
* from the main thread won't affect the default dns orders in workers.
* @since v16.4.0, v14.18.0
* @param order must be `'ipv4first'`, `'ipv6first'` or `'verbatim'`.
*/
function setDefaultResultOrder(order: "ipv4first" | "ipv6first" | "verbatim"): void;
// Error codes
const NODATA: "ENODATA";
const FORMERR: "EFORMERR";
const SERVFAIL: "ESERVFAIL";
const NOTFOUND: "ENOTFOUND";
const NOTIMP: "ENOTIMP";
const REFUSED: "EREFUSED";
const BADQUERY: "EBADQUERY";
const BADNAME: "EBADNAME";
const BADFAMILY: "EBADFAMILY";
const BADRESP: "EBADRESP";
const CONNREFUSED: "ECONNREFUSED";
const TIMEOUT: "ETIMEOUT";
const EOF: "EOF";
const FILE: "EFILE";
const NOMEM: "ENOMEM";
const DESTRUCTION: "EDESTRUCTION";
const BADSTR: "EBADSTR";
const BADFLAGS: "EBADFLAGS";
const NONAME: "ENONAME";
const BADHINTS: "EBADHINTS";
const NOTINITIALIZED: "ENOTINITIALIZED";
const LOADIPHLPAPI: "ELOADIPHLPAPI";
const ADDRGETNETWORKPARAMS: "EADDRGETNETWORKPARAMS";
const CANCELLED: "ECANCELLED";
/**
* An independent resolver for DNS requests.
*
* Creating a new resolver uses the default server settings. Setting
* the servers used for a resolver using [`resolver.setServers()`](https://nodejs.org/docs/latest-v20.x/api/dns.html#dnspromisessetserversservers) does not affect
* other resolvers:
*
* ```js
* import { promises } from 'node:dns';
* const resolver = new promises.Resolver();
* resolver.setServers(['4.4.4.4']);
*
* // This request will use the server at 4.4.4.4, independent of global settings.
* resolver.resolve4('example.org').then((addresses) => {
* // ...
* });
*
* // Alternatively, the same code can be written using async-await style.
* (async function() {
* const addresses = await resolver.resolve4('example.org');
* })();
* ```
*
* The following methods from the `dnsPromises` API are available:
*
* * `resolver.getServers()`
* * `resolver.resolve()`
* * `resolver.resolve4()`
* * `resolver.resolve6()`
* * `resolver.resolveAny()`
* * `resolver.resolveCaa()`
* * `resolver.resolveCname()`
* * `resolver.resolveMx()`
* * `resolver.resolveNaptr()`
* * `resolver.resolveNs()`
* * `resolver.resolvePtr()`
* * `resolver.resolveSoa()`
* * `resolver.resolveSrv()`
* * `resolver.resolveTxt()`
* * `resolver.reverse()`
* * `resolver.setServers()`
* @since v10.6.0
*/
class Resolver {
constructor(options?: ResolverOptions);
/**
* Cancel all outstanding DNS queries made by this resolver. The corresponding
* callbacks will be called with an error with code `ECANCELLED`.
* @since v8.3.0
*/
cancel(): void;
getServers: typeof getServers;
resolve: typeof resolve;
resolve4: typeof resolve4;
resolve6: typeof resolve6;
resolveAny: typeof resolveAny;
resolveCaa: typeof resolveCaa;
resolveCname: typeof resolveCname;
resolveMx: typeof resolveMx;
resolveNaptr: typeof resolveNaptr;
resolveNs: typeof resolveNs;
resolvePtr: typeof resolvePtr;
resolveSoa: typeof resolveSoa;
resolveSrv: typeof resolveSrv;
resolveTlsa: typeof resolveTlsa;
resolveTxt: typeof resolveTxt;
reverse: typeof reverse;
/**
* The resolver instance will send its requests from the specified IP address.
* This allows programs to specify outbound interfaces when used on multi-homed
* systems.
*
* If a v4 or v6 address is not specified, it is set to the default and the
* operating system will choose a local address automatically.
*
* The resolver will use the v4 local address when making requests to IPv4 DNS
* servers, and the v6 local address when making requests to IPv6 DNS servers.
* The `rrtype` of resolution requests has no impact on the local address used.
* @since v15.1.0, v14.17.0
* @param [ipv4='0.0.0.0'] A string representation of an IPv4 address.
* @param [ipv6='::0'] A string representation of an IPv6 address.
*/
setLocalAddress(ipv4?: string, ipv6?: string): void;
setServers: typeof setServers;
}
}
declare module "dns/promises" {
export * from "node:dns/promises";
}

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/**
* **This module is pending deprecation.** Once a replacement API has been
* finalized, this module will be fully deprecated. Most developers should
* **not** have cause to use this module. Users who absolutely must have
* the functionality that domains provide may rely on it for the time being
* but should expect to have to migrate to a different solution
* in the future.
*
* Domains provide a way to handle multiple different IO operations as a
* single group. If any of the event emitters or callbacks registered to a
* domain emit an `'error'` event, or throw an error, then the domain object
* will be notified, rather than losing the context of the error in the `process.on('uncaughtException')` handler, or causing the program to
* exit immediately with an error code.
* @deprecated Since v1.4.2 - Deprecated
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/domain.js)
*/
declare module "node:domain" {
import { EventEmitter } from "node:events";
/**
* The `Domain` class encapsulates the functionality of routing errors and
* uncaught exceptions to the active `Domain` object.
*
* To handle the errors that it catches, listen to its `'error'` event.
*/
class Domain extends EventEmitter {
/**
* An array of event emitters that have been explicitly added to the domain.
*/
members: EventEmitter[];
/**
* The `enter()` method is plumbing used by the `run()`, `bind()`, and `intercept()` methods to set the active domain. It sets `domain.active` and `process.domain` to the domain, and implicitly
* pushes the domain onto the domain
* stack managed by the domain module (see {@link exit} for details on the
* domain stack). The call to `enter()` delimits the beginning of a chain of
* asynchronous calls and I/O operations bound to a domain.
*
* Calling `enter()` changes only the active domain, and does not alter the domain
* itself. `enter()` and `exit()` can be called an arbitrary number of times on a
* single domain.
*/
enter(): void;
/**
* The `exit()` method exits the current domain, popping it off the domain stack.
* Any time execution is going to switch to the context of a different chain of
* asynchronous calls, it's important to ensure that the current domain is exited.
* The call to `exit()` delimits either the end of or an interruption to the chain
* of asynchronous calls and I/O operations bound to a domain.
*
* If there are multiple, nested domains bound to the current execution context, `exit()` will exit any domains nested within this domain.
*
* Calling `exit()` changes only the active domain, and does not alter the domain
* itself. `enter()` and `exit()` can be called an arbitrary number of times on a
* single domain.
*/
exit(): void;
/**
* Run the supplied function in the context of the domain, implicitly
* binding all event emitters, timers, and low-level requests that are
* created in that context. Optionally, arguments can be passed to
* the function.
*
* This is the most basic way to use a domain.
*
* ```js
* import domain from 'node:domain';
* import fs from 'node:fs';
* const d = domain.create();
* d.on('error', (er) => {
* console.error('Caught error!', er);
* });
* d.run(() => {
* process.nextTick(() => {
* setTimeout(() => { // Simulating some various async stuff
* fs.open('non-existent file', 'r', (er, fd) => {
* if (er) throw er;
* // proceed...
* });
* }, 100);
* });
* });
* ```
*
* In this example, the `d.on('error')` handler will be triggered, rather
* than crashing the program.
*/
run<T>(fn: (...args: any[]) => T, ...args: any[]): T;
/**
* Explicitly adds an emitter to the domain. If any event handlers called by
* the emitter throw an error, or if the emitter emits an `'error'` event, it
* will be routed to the domain's `'error'` event, just like with implicit
* binding.
*
* If the `EventEmitter` was already bound to a domain, it is removed from that
* one, and bound to this one instead.
* @param emitter emitter to be added to the domain
*/
add(emitter: EventEmitter): void;
/**
* The opposite of {@link add}. Removes domain handling from the
* specified emitter.
* @param emitter emitter to be removed from the domain
*/
remove(emitter: EventEmitter): void;
/**
* The returned function will be a wrapper around the supplied callback
* function. When the returned function is called, any errors that are
* thrown will be routed to the domain's `'error'` event.
*
* ```js
* const d = domain.create();
*
* function readSomeFile(filename, cb) {
* fs.readFile(filename, 'utf8', d.bind((er, data) => {
* // If this throws, it will also be passed to the domain.
* return cb(er, data ? JSON.parse(data) : null);
* }));
* }
*
* d.on('error', (er) => {
* // An error occurred somewhere. If we throw it now, it will crash the program
* // with the normal line number and stack message.
* });
* ```
* @param callback The callback function
* @return The bound function
*/
bind<T extends Function>(callback: T): T;
/**
* This method is almost identical to {@link bind}. However, in
* addition to catching thrown errors, it will also intercept `Error` objects sent as the first argument to the function.
*
* In this way, the common `if (err) return callback(err);` pattern can be replaced
* with a single error handler in a single place.
*
* ```js
* const d = domain.create();
*
* function readSomeFile(filename, cb) {
* fs.readFile(filename, 'utf8', d.intercept((data) => {
* // Note, the first argument is never passed to the
* // callback since it is assumed to be the 'Error' argument
* // and thus intercepted by the domain.
*
* // If this throws, it will also be passed to the domain
* // so the error-handling logic can be moved to the 'error'
* // event on the domain instead of being repeated throughout
* // the program.
* return cb(null, JSON.parse(data));
* }));
* }
*
* d.on('error', (er) => {
* // An error occurred somewhere. If we throw it now, it will crash the program
* // with the normal line number and stack message.
* });
* ```
* @param callback The callback function
* @return The intercepted function
*/
intercept<T extends Function>(callback: T): T;
}
function create(): Domain;
}
declare module "domain" {
export * from "node:domain";
}

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declare var global: typeof globalThis;
declare var process: NodeJS.Process;
interface ErrorConstructor {
/**
* Creates a `.stack` property on `targetObject`, which when accessed returns
* a string representing the location in the code at which
* `Error.captureStackTrace()` was called.
*
* ```js
* const myObject = {};
* Error.captureStackTrace(myObject);
* myObject.stack; // Similar to `new Error().stack`
* ```
*
* The first line of the trace will be prefixed with
* `${myObject.name}: ${myObject.message}`.
*
* The optional `constructorOpt` argument accepts a function. If given, all frames
* above `constructorOpt`, including `constructorOpt`, will be omitted from the
* generated stack trace.
*
* The `constructorOpt` argument is useful for hiding implementation
* details of error generation from the user. For instance:
*
* ```js
* function a() {
* b();
* }
*
* function b() {
* c();
* }
*
* function c() {
* // Create an error without stack trace to avoid calculating the stack trace twice.
* const { stackTraceLimit } = Error;
* Error.stackTraceLimit = 0;
* const error = new Error();
* Error.stackTraceLimit = stackTraceLimit;
*
* // Capture the stack trace above function b
* Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
* throw error;
* }
*
* a();
* ```
*/
captureStackTrace(targetObject: object, constructorOpt?: Function): void;
/**
* @see https://v8.dev/docs/stack-trace-api#customizing-stack-traces
*/
prepareStackTrace(err: Error, stackTraces: NodeJS.CallSite[]): any;
/**
* The `Error.stackTraceLimit` property specifies the number of stack frames
* collected by a stack trace (whether generated by `new Error().stack` or
* `Error.captureStackTrace(obj)`).
*
* The default value is `10` but may be set to any valid JavaScript number. Changes
* will affect any stack trace captured _after_ the value has been changed.
*
* If set to a non-number value, or set to a negative number, stack traces will
* not capture any frames.
*/
stackTraceLimit: number;
}
/**
* Enable this API with the `--expose-gc` CLI flag.
*/
declare var gc: NodeJS.GCFunction | undefined;
declare namespace NodeJS {
interface CallSite {
getColumnNumber(): number | null;
getEnclosingColumnNumber(): number | null;
getEnclosingLineNumber(): number | null;
getEvalOrigin(): string | undefined;
getFileName(): string | null;
getFunction(): Function | undefined;
getFunctionName(): string | null;
getLineNumber(): number | null;
getMethodName(): string | null;
getPosition(): number;
getPromiseIndex(): number | null;
getScriptHash(): string;
getScriptNameOrSourceURL(): string | null;
getThis(): unknown;
getTypeName(): string | null;
isAsync(): boolean;
isConstructor(): boolean;
isEval(): boolean;
isNative(): boolean;
isPromiseAll(): boolean;
isToplevel(): boolean;
}
interface ErrnoException extends Error {
errno?: number | undefined;
code?: string | undefined;
path?: string | undefined;
syscall?: string | undefined;
}
interface RefCounted {
ref(): this;
unref(): this;
}
interface Dict<T> {
[key: string]: T | undefined;
}
interface ReadOnlyDict<T> {
readonly [key: string]: T | undefined;
}
type PartialOptions<T> = { [K in keyof T]?: T[K] | undefined };
interface GCFunction {
(minor?: boolean): void;
(options: NodeJS.GCOptions & { execution: "async" }): Promise<void>;
(options: NodeJS.GCOptions): void;
}
interface GCOptions {
execution?: "sync" | "async" | undefined;
flavor?: "regular" | "last-resort" | undefined;
type?: "major-snapshot" | "major" | "minor" | undefined;
filename?: string | undefined;
}
/** An iterable iterator returned by the Node.js API. */
interface Iterator<T, TReturn = undefined, TNext = any> extends IteratorObject<T, TReturn, TNext> {
[Symbol.iterator](): NodeJS.Iterator<T, TReturn, TNext>;
}
/** An async iterable iterator returned by the Node.js API. */
interface AsyncIterator<T, TReturn = undefined, TNext = any> extends AsyncIteratorObject<T, TReturn, TNext> {
[Symbol.asyncIterator](): NodeJS.AsyncIterator<T, TReturn, TNext>;
}
/** The [`BufferSource`](https://webidl.spec.whatwg.org/#BufferSource) type from the Web IDL specification. */
type BufferSource = NonSharedArrayBufferView | ArrayBuffer;
/** The [`AllowSharedBufferSource`](https://webidl.spec.whatwg.org/#AllowSharedBufferSource) type from the Web IDL specification. */
type AllowSharedBufferSource = ArrayBufferView | ArrayBufferLike;
}

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export {}; // Make this a module
declare global {
namespace NodeJS {
type TypedArray<TArrayBuffer extends ArrayBufferLike = ArrayBufferLike> =
| Uint8Array<TArrayBuffer>
| Uint8ClampedArray<TArrayBuffer>
| Uint16Array<TArrayBuffer>
| Uint32Array<TArrayBuffer>
| Int8Array<TArrayBuffer>
| Int16Array<TArrayBuffer>
| Int32Array<TArrayBuffer>
| BigUint64Array<TArrayBuffer>
| BigInt64Array<TArrayBuffer>
| Float16Array<TArrayBuffer>
| Float32Array<TArrayBuffer>
| Float64Array<TArrayBuffer>;
type ArrayBufferView<TArrayBuffer extends ArrayBufferLike = ArrayBufferLike> =
| TypedArray<TArrayBuffer>
| DataView<TArrayBuffer>;
// The following aliases are required to allow use of non-shared ArrayBufferViews in @types/node
// while maintaining compatibility with TS <=5.6.
// TODO: remove once @types/node no longer supports TS 5.6, and replace with native types.
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedUint8Array = Uint8Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedUint8ClampedArray = Uint8ClampedArray<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedUint16Array = Uint16Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedUint32Array = Uint32Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedInt8Array = Int8Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedInt16Array = Int16Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedInt32Array = Int32Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedBigUint64Array = BigUint64Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedBigInt64Array = BigInt64Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedFloat16Array = Float16Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedFloat32Array = Float32Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedFloat64Array = Float64Array<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedDataView = DataView<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedTypedArray = TypedArray<ArrayBuffer>;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedArrayBufferView = ArrayBufferView<ArrayBuffer>;
}
}

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/**
* HTTPS is the HTTP protocol over TLS/SSL. In Node.js this is implemented as a
* separate module.
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/https.js)
*/
declare module "node:https" {
import * as http from "node:http";
import { Duplex } from "node:stream";
import * as tls from "node:tls";
import { URL } from "node:url";
interface ServerOptions<
Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
> extends http.ServerOptions<Request, Response>, tls.TlsOptions {}
interface RequestOptions extends http.RequestOptions, tls.SecureContextOptions {
checkServerIdentity?:
| ((hostname: string, cert: tls.DetailedPeerCertificate) => Error | undefined)
| undefined;
rejectUnauthorized?: boolean | undefined; // Defaults to true
servername?: string | undefined; // SNI TLS Extension
}
interface AgentOptions extends http.AgentOptions, tls.ConnectionOptions {
maxCachedSessions?: number | undefined;
}
/**
* An `Agent` object for HTTPS similar to `http.Agent`. See {@link request} for more information.
*
* Like `http.Agent`, the `createConnection(options[, callback])` method can be overridden
* to customize how TLS connections are established.
*
* > See `agent.createConnection()` for details on overriding this method,
* > including asynchronous socket creation with a callback.
* @since v0.4.5
*/
class Agent extends http.Agent {
constructor(options?: AgentOptions);
options: AgentOptions;
createConnection(
options: RequestOptions,
callback?: (err: Error | null, stream: Duplex) => void,
): Duplex | null | undefined;
getName(options?: RequestOptions): string;
}
interface ServerEventMap<
Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
> extends http.ServerEventMap<Request, Response>, tls.ServerEventMap {}
/**
* See `http.Server` for more information.
* @since v0.3.4
*/
class Server<
Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
> extends tls.Server {
constructor(requestListener?: http.RequestListener<Request, Response>);
constructor(
options: ServerOptions<Request, Response>,
requestListener?: http.RequestListener<Request, Response>,
);
/**
* Closes all connections connected to this server.
* @since v18.2.0
*/
closeAllConnections(): void;
/**
* Closes all connections connected to this server which are not sending a request or waiting for a response.
* @since v18.2.0
*/
closeIdleConnections(): void;
// #region InternalEventEmitter
addListener<E extends keyof ServerEventMap>(
eventName: E,
listener: (...args: ServerEventMap<Request, Response>[E]) => void,
): this;
addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
emit<E extends keyof ServerEventMap>(eventName: E, ...args: ServerEventMap<Request, Response>[E]): boolean;
emit(eventName: string | symbol, ...args: any[]): boolean;
listenerCount<E extends keyof ServerEventMap>(
eventName: E,
listener?: (...args: ServerEventMap<Request, Response>[E]) => void,
): number;
listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
listeners<E extends keyof ServerEventMap>(
eventName: E,
): ((...args: ServerEventMap<Request, Response>[E]) => void)[];
listeners(eventName: string | symbol): ((...args: any[]) => void)[];
off<E extends keyof ServerEventMap>(
eventName: E,
listener: (...args: ServerEventMap<Request, Response>[E]) => void,
): this;
off(eventName: string | symbol, listener: (...args: any[]) => void): this;
on<E extends keyof ServerEventMap>(
eventName: E,
listener: (...args: ServerEventMap<Request, Response>[E]) => void,
): this;
on(eventName: string | symbol, listener: (...args: any[]) => void): this;
once<E extends keyof ServerEventMap>(
eventName: E,
listener: (...args: ServerEventMap<Request, Response>[E]) => void,
): this;
once(eventName: string | symbol, listener: (...args: any[]) => void): this;
prependListener<E extends keyof ServerEventMap>(
eventName: E,
listener: (...args: ServerEventMap<Request, Response>[E]) => void,
): this;
prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
prependOnceListener<E extends keyof ServerEventMap>(
eventName: E,
listener: (...args: ServerEventMap<Request, Response>[E]) => void,
): this;
prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
rawListeners<E extends keyof ServerEventMap>(
eventName: E,
): ((...args: ServerEventMap<Request, Response>[E]) => void)[];
rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
// eslint-disable-next-line @definitelytyped/no-unnecessary-generics
removeAllListeners<E extends keyof ServerEventMap>(eventName?: E): this;
removeAllListeners(eventName?: string | symbol): this;
removeListener<E extends keyof ServerEventMap>(
eventName: E,
listener: (...args: ServerEventMap<Request, Response>[E]) => void,
): this;
removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
// #endregion
}
interface Server<
Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
> extends http.Server<Request, Response> {}
/**
* ```js
* // curl -k https://localhost:8000/
* import https from 'node:https';
* import fs from 'node:fs';
*
* const options = {
* key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
* cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem'),
* };
*
* https.createServer(options, (req, res) => {
* res.writeHead(200);
* res.end('hello world\n');
* }).listen(8000);
* ```
*
* Or
*
* ```js
* import https from 'node:https';
* import fs from 'node:fs';
*
* const options = {
* pfx: fs.readFileSync('test/fixtures/test_cert.pfx'),
* passphrase: 'sample',
* };
*
* https.createServer(options, (req, res) => {
* res.writeHead(200);
* res.end('hello world\n');
* }).listen(8000);
* ```
* @since v0.3.4
* @param options Accepts `options` from `createServer`, `createSecureContext` and `createServer`.
* @param requestListener A listener to be added to the `'request'` event.
*/
function createServer<
Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
>(requestListener?: http.RequestListener<Request, Response>): Server<Request, Response>;
function createServer<
Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
>(
options: ServerOptions<Request, Response>,
requestListener?: http.RequestListener<Request, Response>,
): Server<Request, Response>;
/**
* Makes a request to a secure web server.
*
* The following additional `options` from `tls.connect()` are also accepted: `ca`, `cert`, `ciphers`, `clientCertEngine`, `crl`, `dhparam`, `ecdhCurve`, `honorCipherOrder`, `key`, `passphrase`,
* `pfx`, `rejectUnauthorized`, `secureOptions`, `secureProtocol`, `servername`, `sessionIdContext`, `highWaterMark`.
*
* `options` can be an object, a string, or a `URL` object. If `options` is a
* string, it is automatically parsed with `new URL()`. If it is a `URL` object, it will be automatically converted to an ordinary `options` object.
*
* `https.request()` returns an instance of the `http.ClientRequest` class. The `ClientRequest` instance is a writable stream. If one needs to
* upload a file with a POST request, then write to the `ClientRequest` object.
*
* ```js
* import https from 'node:https';
*
* const options = {
* hostname: 'encrypted.google.com',
* port: 443,
* path: '/',
* method: 'GET',
* };
*
* const req = https.request(options, (res) => {
* console.log('statusCode:', res.statusCode);
* console.log('headers:', res.headers);
*
* res.on('data', (d) => {
* process.stdout.write(d);
* });
* });
*
* req.on('error', (e) => {
* console.error(e);
* });
* req.end();
* ```
*
* Example using options from `tls.connect()`:
*
* ```js
* const options = {
* hostname: 'encrypted.google.com',
* port: 443,
* path: '/',
* method: 'GET',
* key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
* cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem'),
* };
* options.agent = new https.Agent(options);
*
* const req = https.request(options, (res) => {
* // ...
* });
* ```
*
* Alternatively, opt out of connection pooling by not using an `Agent`.
*
* ```js
* const options = {
* hostname: 'encrypted.google.com',
* port: 443,
* path: '/',
* method: 'GET',
* key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
* cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem'),
* agent: false,
* };
*
* const req = https.request(options, (res) => {
* // ...
* });
* ```
*
* Example using a `URL` as `options`:
*
* ```js
* const options = new URL('https://abc:xyz@example.com');
*
* const req = https.request(options, (res) => {
* // ...
* });
* ```
*
* Example pinning on certificate fingerprint, or the public key (similar to`pin-sha256`):
*
* ```js
* import tls from 'node:tls';
* import https from 'node:https';
* import crypto from 'node:crypto';
*
* function sha256(s) {
* return crypto.createHash('sha256').update(s).digest('base64');
* }
* const options = {
* hostname: 'github.com',
* port: 443,
* path: '/',
* method: 'GET',
* checkServerIdentity: function(host, cert) {
* // Make sure the certificate is issued to the host we are connected to
* const err = tls.checkServerIdentity(host, cert);
* if (err) {
* return err;
* }
*
* // Pin the public key, similar to HPKP pin-sha256 pinning
* const pubkey256 = 'pL1+qb9HTMRZJmuC/bB/ZI9d302BYrrqiVuRyW+DGrU=';
* if (sha256(cert.pubkey) !== pubkey256) {
* const msg = 'Certificate verification error: ' +
* `The public key of '${cert.subject.CN}' ` +
* 'does not match our pinned fingerprint';
* return new Error(msg);
* }
*
* // Pin the exact certificate, rather than the pub key
* const cert256 = '25:FE:39:32:D9:63:8C:8A:FC:A1:9A:29:87:' +
* 'D8:3E:4C:1D:98:DB:71:E4:1A:48:03:98:EA:22:6A:BD:8B:93:16';
* if (cert.fingerprint256 !== cert256) {
* const msg = 'Certificate verification error: ' +
* `The certificate of '${cert.subject.CN}' ` +
* 'does not match our pinned fingerprint';
* return new Error(msg);
* }
*
* // This loop is informational only.
* // Print the certificate and public key fingerprints of all certs in the
* // chain. Its common to pin the public key of the issuer on the public
* // internet, while pinning the public key of the service in sensitive
* // environments.
* do {
* console.log('Subject Common Name:', cert.subject.CN);
* console.log(' Certificate SHA256 fingerprint:', cert.fingerprint256);
*
* hash = crypto.createHash('sha256');
* console.log(' Public key ping-sha256:', sha256(cert.pubkey));
*
* lastprint256 = cert.fingerprint256;
* cert = cert.issuerCertificate;
* } while (cert.fingerprint256 !== lastprint256);
*
* },
* };
*
* options.agent = new https.Agent(options);
* const req = https.request(options, (res) => {
* console.log('All OK. Server matched our pinned cert or public key');
* console.log('statusCode:', res.statusCode);
* // Print the HPKP values
* console.log('headers:', res.headers['public-key-pins']);
*
* res.on('data', (d) => {});
* });
*
* req.on('error', (e) => {
* console.error(e.message);
* });
* req.end();
* ```
*
* Outputs for example:
*
* ```text
* Subject Common Name: github.com
* Certificate SHA256 fingerprint: 25:FE:39:32:D9:63:8C:8A:FC:A1:9A:29:87:D8:3E:4C:1D:98:DB:71:E4:1A:48:03:98:EA:22:6A:BD:8B:93:16
* Public key ping-sha256: pL1+qb9HTMRZJmuC/bB/ZI9d302BYrrqiVuRyW+DGrU=
* Subject Common Name: DigiCert SHA2 Extended Validation Server CA
* Certificate SHA256 fingerprint: 40:3E:06:2A:26:53:05:91:13:28:5B:AF:80:A0:D4:AE:42:2C:84:8C:9F:78:FA:D0:1F:C9:4B:C5:B8:7F:EF:1A
* Public key ping-sha256: RRM1dGqnDFsCJXBTHky16vi1obOlCgFFn/yOhI/y+ho=
* Subject Common Name: DigiCert High Assurance EV Root CA
* Certificate SHA256 fingerprint: 74:31:E5:F4:C3:C1:CE:46:90:77:4F:0B:61:E0:54:40:88:3B:A9:A0:1E:D0:0B:A6:AB:D7:80:6E:D3:B1:18:CF
* Public key ping-sha256: WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18=
* All OK. Server matched our pinned cert or public key
* statusCode: 200
* headers: max-age=0; pin-sha256="WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18="; pin-sha256="RRM1dGqnDFsCJXBTHky16vi1obOlCgFFn/yOhI/y+ho=";
* pin-sha256="k2v657xBsOVe1PQRwOsHsw3bsGT2VzIqz5K+59sNQws="; pin-sha256="K87oWBWM9UZfyddvDfoxL+8lpNyoUB2ptGtn0fv6G2Q="; pin-sha256="IQBnNBEiFuhj+8x6X8XLgh01V9Ic5/V3IRQLNFFc7v4=";
* pin-sha256="iie1VXtL7HzAMF+/PVPR9xzT80kQxdZeJ+zduCB3uj0="; pin-sha256="LvRiGEjRqfzurezaWuj8Wie2gyHMrW5Q06LspMnox7A="; includeSubDomains
* ```
* @since v0.3.6
* @param options Accepts all `options` from `request`, with some differences in default values:
*/
function request(
options: RequestOptions | string | URL,
callback?: (res: http.IncomingMessage) => void,
): http.ClientRequest;
function request(
url: string | URL,
options: RequestOptions,
callback?: (res: http.IncomingMessage) => void,
): http.ClientRequest;
/**
* Like `http.get()` but for HTTPS.
*
* `options` can be an object, a string, or a `URL` object. If `options` is a
* string, it is automatically parsed with `new URL()`. If it is a `URL` object, it will be automatically converted to an ordinary `options` object.
*
* ```js
* import https from 'node:https';
*
* https.get('https://encrypted.google.com/', (res) => {
* console.log('statusCode:', res.statusCode);
* console.log('headers:', res.headers);
*
* res.on('data', (d) => {
* process.stdout.write(d);
* });
*
* }).on('error', (e) => {
* console.error(e);
* });
* ```
* @since v0.3.6
* @param options Accepts the same `options` as {@link request}, with the `method` always set to `GET`.
*/
function get(
options: RequestOptions | string | URL,
callback?: (res: http.IncomingMessage) => void,
): http.ClientRequest;
function get(
url: string | URL,
options: RequestOptions,
callback?: (res: http.IncomingMessage) => void,
): http.ClientRequest;
let globalAgent: Agent;
}
declare module "https" {
export * from "node:https";
}

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/**
* License for programmatically and manually incorporated
* documentation aka. `JSDoc` from https://github.com/nodejs/node/tree/master/doc
*
* Copyright Node.js contributors. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
// NOTE: These definitions support Node.js and TypeScript 5.8+.
// Reference required TypeScript libraries:
/// <reference lib="es2020" />
/// <reference lib="esnext.disposable" />
/// <reference lib="esnext.float16" />
// Iterator definitions required for compatibility with TypeScript <5.6:
/// <reference path="compatibility/iterators.d.ts" />
// Definitions for Node.js modules specific to TypeScript 5.7+:
/// <reference path="globals.typedarray.d.ts" />
/// <reference path="buffer.buffer.d.ts" />
// Definitions for Node.js modules that are not specific to any version of TypeScript:
/// <reference path="globals.d.ts" />
/// <reference path="web-globals/abortcontroller.d.ts" />
/// <reference path="web-globals/blob.d.ts" />
/// <reference path="web-globals/console.d.ts" />
/// <reference path="web-globals/crypto.d.ts" />
/// <reference path="web-globals/domexception.d.ts" />
/// <reference path="web-globals/encoding.d.ts" />
/// <reference path="web-globals/events.d.ts" />
/// <reference path="web-globals/fetch.d.ts" />
/// <reference path="web-globals/importmeta.d.ts" />
/// <reference path="web-globals/messaging.d.ts" />
/// <reference path="web-globals/navigator.d.ts" />
/// <reference path="web-globals/performance.d.ts" />
/// <reference path="web-globals/storage.d.ts" />
/// <reference path="web-globals/streams.d.ts" />
/// <reference path="web-globals/timers.d.ts" />
/// <reference path="web-globals/url.d.ts" />
/// <reference path="assert.d.ts" />
/// <reference path="assert/strict.d.ts" />
/// <reference path="async_hooks.d.ts" />
/// <reference path="buffer.d.ts" />
/// <reference path="child_process.d.ts" />
/// <reference path="cluster.d.ts" />
/// <reference path="console.d.ts" />
/// <reference path="constants.d.ts" />
/// <reference path="crypto.d.ts" />
/// <reference path="dgram.d.ts" />
/// <reference path="diagnostics_channel.d.ts" />
/// <reference path="dns.d.ts" />
/// <reference path="dns/promises.d.ts" />
/// <reference path="domain.d.ts" />
/// <reference path="events.d.ts" />
/// <reference path="fs.d.ts" />
/// <reference path="fs/promises.d.ts" />
/// <reference path="http.d.ts" />
/// <reference path="http2.d.ts" />
/// <reference path="https.d.ts" />
/// <reference path="inspector.d.ts" />
/// <reference path="inspector.generated.d.ts" />
/// <reference path="inspector/promises.d.ts" />
/// <reference path="module.d.ts" />
/// <reference path="net.d.ts" />
/// <reference path="os.d.ts" />
/// <reference path="path.d.ts" />
/// <reference path="path/posix.d.ts" />
/// <reference path="path/win32.d.ts" />
/// <reference path="perf_hooks.d.ts" />
/// <reference path="process.d.ts" />
/// <reference path="punycode.d.ts" />
/// <reference path="querystring.d.ts" />
/// <reference path="quic.d.ts" />
/// <reference path="readline.d.ts" />
/// <reference path="readline/promises.d.ts" />
/// <reference path="repl.d.ts" />
/// <reference path="sea.d.ts" />
/// <reference path="sqlite.d.ts" />
/// <reference path="stream.d.ts" />
/// <reference path="stream/consumers.d.ts" />
/// <reference path="stream/promises.d.ts" />
/// <reference path="stream/web.d.ts" />
/// <reference path="string_decoder.d.ts" />
/// <reference path="test.d.ts" />
/// <reference path="test/reporters.d.ts" />
/// <reference path="timers.d.ts" />
/// <reference path="timers/promises.d.ts" />
/// <reference path="tls.d.ts" />
/// <reference path="trace_events.d.ts" />
/// <reference path="tty.d.ts" />
/// <reference path="url.d.ts" />
/// <reference path="util.d.ts" />
/// <reference path="util/types.d.ts" />
/// <reference path="v8.d.ts" />
/// <reference path="vm.d.ts" />
/// <reference path="wasi.d.ts" />
/// <reference path="worker_threads.d.ts" />
/// <reference path="zlib.d.ts" />

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/**
* The `node:inspector` module provides an API for interacting with the V8
* inspector.
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/inspector.js)
*/
declare module "node:inspector" {
import { EventEmitter } from "node:events";
/**
* The `inspector.Session` is used for dispatching messages to the V8 inspector
* back-end and receiving message responses and notifications.
*/
class Session extends EventEmitter {
/**
* Create a new instance of the inspector.Session class.
* The inspector session needs to be connected through `session.connect()` before the messages can be dispatched to the inspector backend.
*/
constructor();
/**
* Connects a session to the inspector back-end.
*/
connect(): void;
/**
* Connects a session to the inspector back-end.
* An exception will be thrown if this API was not called on a Worker thread.
* @since v12.11.0
*/
connectToMainThread(): void;
/**
* Immediately close the session. All pending message callbacks will be called with an error.
* `session.connect()` will need to be called to be able to send messages again.
* Reconnected session will lose all inspector state, such as enabled agents or configured breakpoints.
*/
disconnect(): void;
}
/**
* Activate inspector on host and port. Equivalent to `node --inspect=[[host:]port]`, but can be done programmatically after node has
* started.
*
* If wait is `true`, will block until a client has connected to the inspect port
* and flow control has been passed to the debugger client.
*
* See the [security warning](https://nodejs.org/docs/latest-v25.x/api/cli.html#warning-binding-inspector-to-a-public-ipport-combination-is-insecure)
* regarding the `host` parameter usage.
* @param port Port to listen on for inspector connections. Defaults to what was specified on the CLI.
* @param host Host to listen on for inspector connections. Defaults to what was specified on the CLI.
* @param wait Block until a client has connected. Defaults to what was specified on the CLI.
* @returns Disposable that calls `inspector.close()`.
*/
function open(port?: number, host?: string, wait?: boolean): Disposable;
/**
* Deactivate the inspector. Blocks until there are no active connections.
*/
function close(): void;
/**
* Return the URL of the active inspector, or `undefined` if there is none.
*
* ```console
* $ node --inspect -p 'inspector.url()'
* Debugger listening on ws://127.0.0.1:9229/166e272e-7a30-4d09-97ce-f1c012b43c34
* For help, see: https://nodejs.org/en/docs/inspector
* ws://127.0.0.1:9229/166e272e-7a30-4d09-97ce-f1c012b43c34
*
* $ node --inspect=localhost:3000 -p 'inspector.url()'
* Debugger listening on ws://localhost:3000/51cf8d0e-3c36-4c59-8efd-54519839e56a
* For help, see: https://nodejs.org/en/docs/inspector
* ws://localhost:3000/51cf8d0e-3c36-4c59-8efd-54519839e56a
*
* $ node -p 'inspector.url()'
* undefined
* ```
*/
function url(): string | undefined;
/**
* Blocks until a client (existing or connected later) has sent `Runtime.runIfWaitingForDebugger` command.
*
* An exception will be thrown if there is no active inspector.
* @since v12.7.0
*/
function waitForDebugger(): void;
// These methods are exposed by the V8 inspector console API (inspector/v8-console.h).
// The method signatures differ from those of the Node.js console, and are deliberately
// typed permissively.
interface InspectorConsole {
debug(...data: any[]): void;
error(...data: any[]): void;
info(...data: any[]): void;
log(...data: any[]): void;
warn(...data: any[]): void;
dir(...data: any[]): void;
dirxml(...data: any[]): void;
table(...data: any[]): void;
trace(...data: any[]): void;
group(...data: any[]): void;
groupCollapsed(...data: any[]): void;
groupEnd(...data: any[]): void;
clear(...data: any[]): void;
count(label?: any): void;
countReset(label?: any): void;
assert(value?: any, ...data: any[]): void;
profile(label?: any): void;
profileEnd(label?: any): void;
time(label?: any): void;
timeLog(label?: any): void;
timeStamp(label?: any): void;
}
/**
* An object to send messages to the remote inspector console.
* @since v11.0.0
*/
const console: InspectorConsole;
// DevTools protocol event broadcast methods
namespace Network {
/**
* This feature is only available with the `--experimental-network-inspection` flag enabled.
*
* Broadcasts the `Network.requestWillBeSent` event to connected frontends. This event indicates that
* the application is about to send an HTTP request.
* @since v22.6.0
*/
function requestWillBeSent(params: RequestWillBeSentEventDataType): void;
/**
* This feature is only available with the `--experimental-network-inspection` flag enabled.
*
* Broadcasts the `Network.dataReceived` event to connected frontends, or buffers the data if
* `Network.streamResourceContent` command was not invoked for the given request yet.
*
* Also enables `Network.getResponseBody` command to retrieve the response data.
* @since v24.2.0
*/
function dataReceived(params: DataReceivedEventDataType): void;
/**
* This feature is only available with the `--experimental-network-inspection` flag enabled.
*
* Enables `Network.getRequestPostData` command to retrieve the request data.
* @since v24.3.0
*/
function dataSent(params: unknown): void;
/**
* This feature is only available with the `--experimental-network-inspection` flag enabled.
*
* Broadcasts the `Network.responseReceived` event to connected frontends. This event indicates that
* HTTP response is available.
* @since v22.6.0
*/
function responseReceived(params: ResponseReceivedEventDataType): void;
/**
* This feature is only available with the `--experimental-network-inspection` flag enabled.
*
* Broadcasts the `Network.loadingFinished` event to connected frontends. This event indicates that
* HTTP request has finished loading.
* @since v22.6.0
*/
function loadingFinished(params: LoadingFinishedEventDataType): void;
/**
* This feature is only available with the `--experimental-network-inspection` flag enabled.
*
* Broadcasts the `Network.loadingFailed` event to connected frontends. This event indicates that
* HTTP request has failed to load.
* @since v22.7.0
*/
function loadingFailed(params: LoadingFailedEventDataType): void;
/**
* This feature is only available with the `--experimental-network-inspection` flag enabled.
*
* Broadcasts the `Network.webSocketCreated` event to connected frontends. This event indicates that
* a WebSocket connection has been initiated.
* @since v24.7.0
*/
function webSocketCreated(params: WebSocketCreatedEventDataType): void;
/**
* This feature is only available with the `--experimental-network-inspection` flag enabled.
*
* Broadcasts the `Network.webSocketHandshakeResponseReceived` event to connected frontends.
* This event indicates that the WebSocket handshake response has been received.
* @since v24.7.0
*/
function webSocketHandshakeResponseReceived(params: WebSocketHandshakeResponseReceivedEventDataType): void;
/**
* This feature is only available with the `--experimental-network-inspection` flag enabled.
*
* Broadcasts the `Network.webSocketClosed` event to connected frontends.
* This event indicates that a WebSocket connection has been closed.
* @since v24.7.0
*/
function webSocketClosed(params: WebSocketClosedEventDataType): void;
}
namespace NetworkResources {
/**
* This feature is only available with the `--experimental-inspector-network-resource` flag enabled.
*
* The inspector.NetworkResources.put method is used to provide a response for a loadNetworkResource
* request issued via the Chrome DevTools Protocol (CDP).
* This is typically triggered when a source map is specified by URL, and a DevTools frontend—such as
* Chrome—requests the resource to retrieve the source map.
*
* This method allows developers to predefine the resource content to be served in response to such CDP requests.
*
* ```js
* const inspector = require('node:inspector');
* // By preemptively calling put to register the resource, a source map can be resolved when
* // a loadNetworkResource request is made from the frontend.
* async function setNetworkResources() {
* const mapUrl = 'http://localhost:3000/dist/app.js.map';
* const tsUrl = 'http://localhost:3000/src/app.ts';
* const distAppJsMap = await fetch(mapUrl).then((res) => res.text());
* const srcAppTs = await fetch(tsUrl).then((res) => res.text());
* inspector.NetworkResources.put(mapUrl, distAppJsMap);
* inspector.NetworkResources.put(tsUrl, srcAppTs);
* };
* setNetworkResources().then(() => {
* require('./dist/app');
* });
* ```
*
* For more details, see the official CDP documentation: [Network.loadNetworkResource](https://chromedevtools.github.io/devtools-protocol/tot/Network/#method-loadNetworkResource)
* @since v24.5.0
* @experimental
*/
function put(url: string, data: string): void;
}
namespace DOMStorage {
/**
* This feature is only available with the
* `--experimental-storage-inspection` flag enabled.
*
* Broadcasts the `DOMStorage.domStorageItemAdded` event to connected frontends.
* This event indicates that a new item has been added to the storage.
* @since v25.5.0
*/
function domStorageItemAdded(params: DomStorageItemAddedEventDataType): void;
/**
* This feature is only available with the
* `--experimental-storage-inspection` flag enabled.
*
* Broadcasts the `DOMStorage.domStorageItemRemoved` event to connected frontends.
* This event indicates that an item has been removed from the storage.
* @since v25.5.0
*/
function domStorageItemRemoved(params: DomStorageItemRemovedEventDataType): void;
/**
* This feature is only available with the
* `--experimental-storage-inspection` flag enabled.
* Broadcasts the `DOMStorage.domStorageItemUpdated` event to connected frontends.
* This event indicates that a storage item has been updated.
* @since v25.5.0
*/
function domStorageItemUpdated(params: DomStorageItemUpdatedEventDataType): void;
/**
* This feature is only available with the
* `--experimental-storage-inspection` flag enabled.
*
* Broadcasts the `DOMStorage.domStorageItemsCleared` event to connected
* frontends. This event indicates that all items have been cleared from the
* storage.
* @since v25.5.0
*/
function domStorageItemsCleared(params: DomStorageItemsClearedEventDataType): void;
/**
* This feature is only available with the
* `--experimental-storage-inspection` flag enabled.
* @since v25.5.0
*/
function registerStorage(params: unknown): void;
}
}
declare module "inspector" {
export * from "node:inspector";
}

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/**
* The `node:inspector/promises` module provides an API for interacting with the V8
* inspector.
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/inspector/promises.js)
* @since v19.0.0
*/
declare module "node:inspector/promises" {
import { EventEmitter } from "node:events";
export { close, console, NetworkResources, open, url, waitForDebugger } from "node:inspector";
/**
* The `inspector.Session` is used for dispatching messages to the V8 inspector
* back-end and receiving message responses and notifications.
* @since v19.0.0
*/
export class Session extends EventEmitter {
/**
* Create a new instance of the inspector.Session class.
* The inspector session needs to be connected through `session.connect()` before the messages can be dispatched to the inspector backend.
*/
constructor();
/**
* Connects a session to the inspector back-end.
*/
connect(): void;
/**
* Connects a session to the inspector back-end.
* An exception will be thrown if this API was not called on a Worker thread.
* @since v12.11.0
*/
connectToMainThread(): void;
/**
* Immediately close the session. All pending message callbacks will be called with an error.
* `session.connect()` will need to be called to be able to send messages again.
* Reconnected session will lose all inspector state, such as enabled agents or configured breakpoints.
*/
disconnect(): void;
}
}
declare module "inspector/promises" {
export * from "node:inspector/promises";
}

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/**
* @since v0.3.7
*/
declare module "node:module" {
import { URL } from "node:url";
class Module {
constructor(id: string, parent?: Module);
}
interface Module extends NodeJS.Module {}
namespace Module {
export { Module };
}
namespace Module {
/**
* A list of the names of all modules provided by Node.js. Can be used to verify
* if a module is maintained by a third party or not.
*
* Note: the list doesn't contain prefix-only modules like `node:test`.
* @since v9.3.0, v8.10.0, v6.13.0
*/
const builtinModules: readonly string[];
/**
* @since v12.2.0
* @param path Filename to be used to construct the require
* function. Must be a file URL object, file URL string, or absolute path
* string.
*/
function createRequire(path: string | URL): NodeJS.Require;
namespace constants {
/**
* The following constants are returned as the `status` field in the object returned by
* {@link enableCompileCache} to indicate the result of the attempt to enable the
* [module compile cache](https://nodejs.org/docs/latest-v25.x/api/module.html#module-compile-cache).
* @since v22.8.0
*/
namespace compileCacheStatus {
/**
* Node.js has enabled the compile cache successfully. The directory used to store the
* compile cache will be returned in the `directory` field in the
* returned object.
*/
const ENABLED: number;
/**
* The compile cache has already been enabled before, either by a previous call to
* {@link enableCompileCache}, or by the `NODE_COMPILE_CACHE=dir`
* environment variable. The directory used to store the
* compile cache will be returned in the `directory` field in the
* returned object.
*/
const ALREADY_ENABLED: number;
/**
* Node.js fails to enable the compile cache. This can be caused by the lack of
* permission to use the specified directory, or various kinds of file system errors.
* The detail of the failure will be returned in the `message` field in the
* returned object.
*/
const FAILED: number;
/**
* Node.js cannot enable the compile cache because the environment variable
* `NODE_DISABLE_COMPILE_CACHE=1` has been set.
*/
const DISABLED: number;
}
}
interface EnableCompileCacheOptions {
/**
* Optional. Directory to store the compile cache. If not specified,
* the directory specified by the `NODE_COMPILE_CACHE=dir` environment variable
* will be used if it's set, or `path.join(os.tmpdir(), 'node-compile-cache')`
* otherwise.
* @since v25.0.0
*/
directory?: string | undefined;
/**
* Optional. If `true`, enables portable compile cache so that
* the cache can be reused even if the project directory is moved. This is a best-effort
* feature. If not specified, it will depend on whether the environment variable
* `NODE_COMPILE_CACHE_PORTABLE=1` is set.
* @since v25.0.0
*/
portable?: boolean | undefined;
}
interface EnableCompileCacheResult {
/**
* One of the {@link constants.compileCacheStatus}
*/
status: number;
/**
* If Node.js cannot enable the compile cache, this contains
* the error message. Only set if `status` is `module.constants.compileCacheStatus.FAILED`.
*/
message?: string;
/**
* If the compile cache is enabled, this contains the directory
* where the compile cache is stored. Only set if `status` is
* `module.constants.compileCacheStatus.ENABLED` or
* `module.constants.compileCacheStatus.ALREADY_ENABLED`.
*/
directory?: string;
}
/**
* Enable [module compile cache](https://nodejs.org/docs/latest-v25.x/api/module.html#module-compile-cache)
* in the current Node.js instance.
*
* For general use cases, it's recommended to call `module.enableCompileCache()` without
* specifying the `options.directory`, so that the directory can be overridden by the
* `NODE_COMPILE_CACHE` environment variable when necessary.
*
* Since compile cache is supposed to be a optimization that is not mission critical, this
* method is designed to not throw any exception when the compile cache cannot be enabled.
* Instead, it will return an object containing an error message in the `message` field to
* aid debugging. If compile cache is enabled successfully, the `directory` field in the
* returned object contains the path to the directory where the compile cache is stored. The
* `status` field in the returned object would be one of the `module.constants.compileCacheStatus`
* values to indicate the result of the attempt to enable the
* [module compile cache](https://nodejs.org/docs/latest-v25.x/api/module.html#module-compile-cache).
*
* This method only affects the current Node.js instance. To enable it in child worker threads,
* either call this method in child worker threads too, or set the
* `process.env.NODE_COMPILE_CACHE` value to compile cache directory so the behavior can
* be inherited into the child workers. The directory can be obtained either from the
* `directory` field returned by this method, or with {@link getCompileCacheDir}.
* @since v22.8.0
* @param options Optional. If a string is passed, it is considered to be `options.directory`.
*/
function enableCompileCache(options?: string | EnableCompileCacheOptions): EnableCompileCacheResult;
/**
* Flush the [module compile cache](https://nodejs.org/docs/latest-v25.x/api/module.html#module-compile-cache)
* accumulated from modules already loaded
* in the current Node.js instance to disk. This returns after all the flushing
* file system operations come to an end, no matter they succeed or not. If there
* are any errors, this will fail silently, since compile cache misses should not
* interfere with the actual operation of the application.
* @since v22.10.0
*/
function flushCompileCache(): void;
/**
* @since v22.8.0
* @return Path to the [module compile cache](https://nodejs.org/docs/latest-v25.x/api/module.html#module-compile-cache)
* directory if it is enabled, or `undefined` otherwise.
*/
function getCompileCacheDir(): string | undefined;
/**
* ```text
* /path/to/project
* ├ packages/
* ├ bar/
* ├ bar.js
* └ package.json // name = '@foo/bar'
* └ qux/
* ├ node_modules/
* └ some-package/
* └ package.json // name = 'some-package'
* ├ qux.js
* └ package.json // name = '@foo/qux'
* ├ main.js
* └ package.json // name = '@foo'
* ```
* ```js
* // /path/to/project/packages/bar/bar.js
* import { findPackageJSON } from 'node:module';
*
* findPackageJSON('..', import.meta.url);
* // '/path/to/project/package.json'
* // Same result when passing an absolute specifier instead:
* findPackageJSON(new URL('../', import.meta.url));
* findPackageJSON(import.meta.resolve('../'));
*
* findPackageJSON('some-package', import.meta.url);
* // '/path/to/project/packages/bar/node_modules/some-package/package.json'
* // When passing an absolute specifier, you might get a different result if the
* // resolved module is inside a subfolder that has nested `package.json`.
* findPackageJSON(import.meta.resolve('some-package'));
* // '/path/to/project/packages/bar/node_modules/some-package/some-subfolder/package.json'
*
* findPackageJSON('@foo/qux', import.meta.url);
* // '/path/to/project/packages/qux/package.json'
* ```
* @since v22.14.0
* @param specifier The specifier for the module whose `package.json` to
* retrieve. When passing a _bare specifier_, the `package.json` at the root of
* the package is returned. When passing a _relative specifier_ or an _absolute specifier_,
* the closest parent `package.json` is returned.
* @param base The absolute location (`file:` URL string or FS path) of the
* containing module. For CJS, use `__filename` (not `__dirname`!); for ESM, use
* `import.meta.url`. You do not need to pass it if `specifier` is an _absolute specifier_.
* @returns A path if the `package.json` is found. When `startLocation`
* is a package, the package's root `package.json`; when a relative or unresolved, the closest
* `package.json` to the `startLocation`.
*/
function findPackageJSON(specifier: string | URL, base?: string | URL): string | undefined;
/**
* @since v18.6.0, v16.17.0
*/
function isBuiltin(moduleName: string): boolean;
interface RegisterOptions<Data> {
/**
* If you want to resolve `specifier` relative to a
* base URL, such as `import.meta.url`, you can pass that URL here. This
* property is ignored if the `parentURL` is supplied as the second argument.
* @default 'data:'
*/
parentURL?: string | URL | undefined;
/**
* Any arbitrary, cloneable JavaScript value to pass into the
* {@link initialize} hook.
*/
data?: Data | undefined;
/**
* [Transferable objects](https://nodejs.org/docs/latest-v25.x/api/worker_threads.html#portpostmessagevalue-transferlist)
* to be passed into the `initialize` hook.
*/
transferList?: any[] | undefined;
}
/* eslint-disable @definitelytyped/no-unnecessary-generics */
/**
* Register a module that exports hooks that customize Node.js module
* resolution and loading behavior. See
* [Customization hooks](https://nodejs.org/docs/latest-v25.x/api/module.html#customization-hooks).
*
* This feature requires `--allow-worker` if used with the
* [Permission Model](https://nodejs.org/docs/latest-v25.x/api/permissions.html#permission-model).
* @since v20.6.0, v18.19.0
* @param specifier Customization hooks to be registered; this should be
* the same string that would be passed to `import()`, except that if it is
* relative, it is resolved relative to `parentURL`.
* @param parentURL f you want to resolve `specifier` relative to a base
* URL, such as `import.meta.url`, you can pass that URL here.
*/
function register<Data = any>(
specifier: string | URL,
parentURL?: string | URL,
options?: RegisterOptions<Data>,
): void;
function register<Data = any>(specifier: string | URL, options?: RegisterOptions<Data>): void;
interface RegisterHooksOptions {
/**
* See [load hook](https://nodejs.org/docs/latest-v25.x/api/module.html#loadurl-context-nextload).
* @default undefined
*/
load?: LoadHookSync | undefined;
/**
* See [resolve hook](https://nodejs.org/docs/latest-v25.x/api/module.html#resolvespecifier-context-nextresolve).
* @default undefined
*/
resolve?: ResolveHookSync | undefined;
}
interface ModuleHooks {
/**
* Deregister the hook instance.
*/
deregister(): void;
}
/**
* Register [hooks](https://nodejs.org/docs/latest-v25.x/api/module.html#customization-hooks)
* that customize Node.js module resolution and loading behavior.
* @since v22.15.0
* @experimental
*/
function registerHooks(options: RegisterHooksOptions): ModuleHooks;
interface StripTypeScriptTypesOptions {
/**
* Possible values are:
* * `'strip'` Only strip type annotations without performing the transformation of TypeScript features.
* * `'transform'` Strip type annotations and transform TypeScript features to JavaScript.
* @default 'strip'
*/
mode?: "strip" | "transform" | undefined;
/**
* Only when `mode` is `'transform'`, if `true`, a source map
* will be generated for the transformed code.
* @default false
*/
sourceMap?: boolean | undefined;
/**
* Specifies the source url used in the source map.
*/
sourceUrl?: string | undefined;
}
/**
* `module.stripTypeScriptTypes()` removes type annotations from TypeScript code. It
* can be used to strip type annotations from TypeScript code before running it
* with `vm.runInContext()` or `vm.compileFunction()`.
* By default, it will throw an error if the code contains TypeScript features
* that require transformation such as `Enums`,
* see [type-stripping](https://nodejs.org/docs/latest-v25.x/api/typescript.md#type-stripping) for more information.
* When mode is `'transform'`, it also transforms TypeScript features to JavaScript,
* see [transform TypeScript features](https://nodejs.org/docs/latest-v25.x/api/typescript.md#typescript-features) for more information.
* When mode is `'strip'`, source maps are not generated, because locations are preserved.
* If `sourceMap` is provided, when mode is `'strip'`, an error will be thrown.
*
* _WARNING_: The output of this function should not be considered stable across Node.js versions,
* due to changes in the TypeScript parser.
*
* ```js
* import { stripTypeScriptTypes } from 'node:module';
* const code = 'const a: number = 1;';
* const strippedCode = stripTypeScriptTypes(code);
* console.log(strippedCode);
* // Prints: const a = 1;
* ```
*
* If `sourceUrl` is provided, it will be used appended as a comment at the end of the output:
*
* ```js
* import { stripTypeScriptTypes } from 'node:module';
* const code = 'const a: number = 1;';
* const strippedCode = stripTypeScriptTypes(code, { mode: 'strip', sourceUrl: 'source.ts' });
* console.log(strippedCode);
* // Prints: const a = 1\n\n//# sourceURL=source.ts;
* ```
*
* When `mode` is `'transform'`, the code is transformed to JavaScript:
*
* ```js
* import { stripTypeScriptTypes } from 'node:module';
* const code = `
* namespace MathUtil {
* export const add = (a: number, b: number) => a + b;
* }`;
* const strippedCode = stripTypeScriptTypes(code, { mode: 'transform', sourceMap: true });
* console.log(strippedCode);
* // Prints:
* // var MathUtil;
* // (function(MathUtil) {
* // MathUtil.add = (a, b)=>a + b;
* // })(MathUtil || (MathUtil = {}));
* // # sourceMappingURL=data:application/json;base64, ...
* ```
* @since v22.13.0
* @param code The code to strip type annotations from.
* @returns The code with type annotations stripped.
*/
function stripTypeScriptTypes(code: string, options?: StripTypeScriptTypesOptions): string;
/* eslint-enable @definitelytyped/no-unnecessary-generics */
/**
* The `module.syncBuiltinESMExports()` method updates all the live bindings for
* builtin `ES Modules` to match the properties of the `CommonJS` exports. It
* does not add or remove exported names from the `ES Modules`.
*
* ```js
* import fs from 'node:fs';
* import assert from 'node:assert';
* import { syncBuiltinESMExports } from 'node:module';
*
* fs.readFile = newAPI;
*
* delete fs.readFileSync;
*
* function newAPI() {
* // ...
* }
*
* fs.newAPI = newAPI;
*
* syncBuiltinESMExports();
*
* import('node:fs').then((esmFS) => {
* // It syncs the existing readFile property with the new value
* assert.strictEqual(esmFS.readFile, newAPI);
* // readFileSync has been deleted from the required fs
* assert.strictEqual('readFileSync' in fs, false);
* // syncBuiltinESMExports() does not remove readFileSync from esmFS
* assert.strictEqual('readFileSync' in esmFS, true);
* // syncBuiltinESMExports() does not add names
* assert.strictEqual(esmFS.newAPI, undefined);
* });
* ```
* @since v12.12.0
*/
function syncBuiltinESMExports(): void;
interface ImportAttributes extends NodeJS.Dict<string> {
type?: string | undefined;
}
type ImportPhase = "source" | "evaluation";
type ModuleFormat =
| "addon"
| "builtin"
| "commonjs"
| "commonjs-typescript"
| "json"
| "module"
| "module-typescript"
| "wasm";
type ModuleSource = string | ArrayBuffer | NodeJS.TypedArray;
type InitializeHook<Data = any> = (data: Data) => void | Promise<void>;
interface ResolveHookContext {
conditions: string[];
importAttributes: ImportAttributes;
parentURL: string | undefined;
}
interface ResolveFnOutput {
format?: string | null | undefined;
importAttributes?: ImportAttributes | undefined;
shortCircuit?: boolean | undefined;
url: string;
}
type ResolveHook = (
specifier: string,
context: ResolveHookContext,
nextResolve: (
specifier: string,
context?: Partial<ResolveHookContext>,
) => ResolveFnOutput | Promise<ResolveFnOutput>,
) => ResolveFnOutput | Promise<ResolveFnOutput>;
type ResolveHookSync = (
specifier: string,
context: ResolveHookContext,
nextResolve: (
specifier: string,
context?: Partial<ResolveHookContext>,
) => ResolveFnOutput,
) => ResolveFnOutput;
interface LoadHookContext {
conditions: string[];
format: string | null | undefined;
importAttributes: ImportAttributes;
}
interface LoadFnOutput {
format: string | null | undefined;
shortCircuit?: boolean | undefined;
source?: ModuleSource | undefined;
}
type LoadHook = (
url: string,
context: LoadHookContext,
nextLoad: (
url: string,
context?: Partial<LoadHookContext>,
) => LoadFnOutput | Promise<LoadFnOutput>,
) => LoadFnOutput | Promise<LoadFnOutput>;
type LoadHookSync = (
url: string,
context: LoadHookContext,
nextLoad: (
url: string,
context?: Partial<LoadHookContext>,
) => LoadFnOutput,
) => LoadFnOutput;
interface SourceMapsSupport {
/**
* If the source maps support is enabled
*/
enabled: boolean;
/**
* If the support is enabled for files in `node_modules`.
*/
nodeModules: boolean;
/**
* If the support is enabled for generated code from `eval` or `new Function`.
*/
generatedCode: boolean;
}
/**
* This method returns whether the [Source Map v3](https://tc39.es/ecma426/) support for stack
* traces is enabled.
* @since v23.7.0, v22.14.0
*/
function getSourceMapsSupport(): SourceMapsSupport;
/**
* `path` is the resolved path for the file for which a corresponding source map
* should be fetched.
* @since v13.7.0, v12.17.0
* @return Returns `module.SourceMap` if a source map is found, `undefined` otherwise.
*/
function findSourceMap(path: string): SourceMap | undefined;
interface SetSourceMapsSupportOptions {
/**
* If enabling the support for files in `node_modules`.
* @default false
*/
nodeModules?: boolean | undefined;
/**
* If enabling the support for generated code from `eval` or `new Function`.
* @default false
*/
generatedCode?: boolean | undefined;
}
/**
* This function enables or disables the [Source Map v3](https://tc39.es/ecma426/) support for
* stack traces.
*
* It provides same features as launching Node.js process with commandline options
* `--enable-source-maps`, with additional options to alter the support for files
* in `node_modules` or generated codes.
*
* Only source maps in JavaScript files that are loaded after source maps has been
* enabled will be parsed and loaded. Preferably, use the commandline options
* `--enable-source-maps` to avoid losing track of source maps of modules loaded
* before this API call.
* @since v23.7.0, v22.14.0
*/
function setSourceMapsSupport(enabled: boolean, options?: SetSourceMapsSupportOptions): void;
interface SourceMapConstructorOptions {
/**
* @since v21.0.0, v20.5.0
*/
lineLengths?: readonly number[] | undefined;
}
interface SourceMapPayload {
file: string;
version: number;
sources: string[];
sourcesContent: string[];
names: string[];
mappings: string;
sourceRoot: string;
}
interface SourceMapping {
generatedLine: number;
generatedColumn: number;
originalSource: string;
originalLine: number;
originalColumn: number;
}
interface SourceOrigin {
/**
* The name of the range in the source map, if one was provided
*/
name: string | undefined;
/**
* The file name of the original source, as reported in the SourceMap
*/
fileName: string;
/**
* The 1-indexed lineNumber of the corresponding call site in the original source
*/
lineNumber: number;
/**
* The 1-indexed columnNumber of the corresponding call site in the original source
*/
columnNumber: number;
}
/**
* @since v13.7.0, v12.17.0
*/
class SourceMap {
constructor(payload: SourceMapPayload, options?: SourceMapConstructorOptions);
/**
* Getter for the payload used to construct the `SourceMap` instance.
*/
readonly payload: SourceMapPayload;
/**
* Given a line offset and column offset in the generated source
* file, returns an object representing the SourceMap range in the
* original file if found, or an empty object if not.
*
* The object returned contains the following keys:
*
* The returned value represents the raw range as it appears in the
* SourceMap, based on zero-indexed offsets, _not_ 1-indexed line and
* column numbers as they appear in Error messages and CallSite
* objects.
*
* To get the corresponding 1-indexed line and column numbers from a
* lineNumber and columnNumber as they are reported by Error stacks
* and CallSite objects, use `sourceMap.findOrigin(lineNumber, columnNumber)`
* @param lineOffset The zero-indexed line number offset in the generated source
* @param columnOffset The zero-indexed column number offset in the generated source
*/
findEntry(lineOffset: number, columnOffset: number): SourceMapping | {};
/**
* Given a 1-indexed `lineNumber` and `columnNumber` from a call site in the generated source,
* find the corresponding call site location in the original source.
*
* If the `lineNumber` and `columnNumber` provided are not found in any source map,
* then an empty object is returned.
* @param lineNumber The 1-indexed line number of the call site in the generated source
* @param columnNumber The 1-indexed column number of the call site in the generated source
*/
findOrigin(lineNumber: number, columnNumber: number): SourceOrigin | {};
}
function runMain(main?: string): void;
function wrap(script: string): string;
}
global {
namespace NodeJS {
interface Module {
/**
* The module objects required for the first time by this one.
* @since v0.1.16
*/
children: Module[];
/**
* The `module.exports` object is created by the `Module` system. Sometimes this is
* not acceptable; many want their module to be an instance of some class. To do
* this, assign the desired export object to `module.exports`.
* @since v0.1.16
*/
exports: any;
/**
* The fully resolved filename of the module.
* @since v0.1.16
*/
filename: string;
/**
* The identifier for the module. Typically this is the fully resolved
* filename.
* @since v0.1.16
*/
id: string;
/**
* `true` if the module is running during the Node.js preload
* phase.
* @since v15.4.0, v14.17.0
*/
isPreloading: boolean;
/**
* Whether or not the module is done loading, or is in the process of
* loading.
* @since v0.1.16
*/
loaded: boolean;
/**
* The module that first required this one, or `null` if the current module is the
* entry point of the current process, or `undefined` if the module was loaded by
* something that is not a CommonJS module (e.g. REPL or `import`).
* @since v0.1.16
* @deprecated Please use `require.main` and `module.children` instead.
*/
parent: Module | null | undefined;
/**
* The directory name of the module. This is usually the same as the
* `path.dirname()` of the `module.id`.
* @since v11.14.0
*/
path: string;
/**
* The search paths for the module.
* @since v0.4.0
*/
paths: string[];
/**
* The `module.require()` method provides a way to load a module as if
* `require()` was called from the original module.
* @since v0.5.1
*/
require(id: string): any;
}
interface Require {
/**
* Used to import modules, `JSON`, and local files.
* @since v0.1.13
*/
(id: string): any;
/**
* Modules are cached in this object when they are required. By deleting a key
* value from this object, the next `require` will reload the module.
* This does not apply to
* [native addons](https://nodejs.org/docs/latest-v25.x/api/addons.html),
* for which reloading will result in an error.
* @since v0.3.0
*/
cache: Dict<Module>;
/**
* Instruct `require` on how to handle certain file extensions.
* @since v0.3.0
* @deprecated
*/
extensions: RequireExtensions;
/**
* The `Module` object representing the entry script loaded when the Node.js
* process launched, or `undefined` if the entry point of the program is not a
* CommonJS module.
* @since v0.1.17
*/
main: Module | undefined;
/**
* @since v0.3.0
*/
resolve: RequireResolve;
}
/** @deprecated */
interface RequireExtensions extends Dict<(module: Module, filename: string) => any> {
".js": (module: Module, filename: string) => any;
".json": (module: Module, filename: string) => any;
".node": (module: Module, filename: string) => any;
}
interface RequireResolveOptions {
/**
* Paths to resolve module location from. If present, these
* paths are used instead of the default resolution paths, with the exception
* of
* [GLOBAL\_FOLDERS](https://nodejs.org/docs/latest-v25.x/api/modules.html#loading-from-the-global-folders)
* like `$HOME/.node_modules`, which are
* always included. Each of these paths is used as a starting point for
* the module resolution algorithm, meaning that the `node_modules` hierarchy
* is checked from this location.
* @since v8.9.0
*/
paths?: string[] | undefined;
}
interface RequireResolve {
/**
* Use the internal `require()` machinery to look up the location of a module,
* but rather than loading the module, just return the resolved filename.
*
* If the module can not be found, a `MODULE_NOT_FOUND` error is thrown.
* @since v0.3.0
* @param request The module path to resolve.
*/
(request: string, options?: RequireResolveOptions): string;
/**
* Returns an array containing the paths searched during resolution of `request` or
* `null` if the `request` string references a core module, for example `http` or
* `fs`.
* @since v8.9.0
* @param request The module path whose lookup paths are being retrieved.
*/
paths(request: string): string[] | null;
}
}
/**
* The directory name of the current module. This is the same as the
* `path.dirname()` of the `__filename`.
* @since v0.1.27
*/
var __dirname: string;
/**
* The file name of the current module. This is the current module file's absolute
* path with symlinks resolved.
*
* For a main program this is not necessarily the same as the file name used in the
* command line.
* @since v0.0.1
*/
var __filename: string;
/**
* The `exports` variable is available within a module's file-level scope, and is
* assigned the value of `module.exports` before the module is evaluated.
* @since v0.1.16
*/
var exports: NodeJS.Module["exports"];
/**
* A reference to the current module.
* @since v0.1.16
*/
var module: NodeJS.Module;
/**
* @since v0.1.13
*/
var require: NodeJS.Require;
// Global-scope aliases for backwards compatibility with @types/node <13.0.x
// TODO: consider removing in a future major version update
/** @deprecated Use `NodeJS.Module` instead. */
interface NodeModule extends NodeJS.Module {}
/** @deprecated Use `NodeJS.Require` instead. */
interface NodeRequire extends NodeJS.Require {}
/** @deprecated Use `NodeJS.RequireResolve` instead. */
interface RequireResolve extends NodeJS.RequireResolve {}
}
export = Module;
}
declare module "module" {
import module = require("node:module");
export = module;
}

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/**
* > Stability: 2 - Stable
*
* The `node:net` module provides an asynchronous network API for creating stream-based
* TCP or `IPC` servers ({@link createServer}) and clients
* ({@link createConnection}).
*
* It can be accessed using:
*
* ```js
* import net from 'node:net';
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/net.js)
*/
declare module "node:net" {
import { NonSharedBuffer } from "node:buffer";
import * as dns from "node:dns";
import { Abortable, EventEmitter, InternalEventEmitter } from "node:events";
import * as stream from "node:stream";
type LookupFunction = (
hostname: string,
options: dns.LookupOptions,
callback: (err: NodeJS.ErrnoException | null, address: string | dns.LookupAddress[], family?: number) => void,
) => void;
interface AddressInfo {
address: string;
family: string;
port: number;
}
interface SocketConstructorOpts {
fd?: number | undefined;
allowHalfOpen?: boolean | undefined;
onread?: OnReadOpts | undefined;
readable?: boolean | undefined;
writable?: boolean | undefined;
signal?: AbortSignal | undefined;
noDelay?: boolean | undefined;
keepAlive?: boolean | undefined;
keepAliveInitialDelay?: number | undefined;
blockList?: BlockList | undefined;
}
interface OnReadOpts {
buffer: Uint8Array | (() => Uint8Array);
/**
* This function is called for every chunk of incoming data.
* Two arguments are passed to it: the number of bytes written to `buffer` and a reference to `buffer`.
* Return `false` from this function to implicitly `pause()` the socket.
*/
callback(bytesWritten: number, buffer: Uint8Array): boolean;
}
interface TcpSocketConnectOpts {
port: number;
host?: string | undefined;
localAddress?: string | undefined;
localPort?: number | undefined;
hints?: number | undefined;
family?: number | undefined;
lookup?: LookupFunction | undefined;
/**
* @since v18.13.0
*/
autoSelectFamily?: boolean | undefined;
/**
* @since v18.13.0
*/
autoSelectFamilyAttemptTimeout?: number | undefined;
}
interface IpcSocketConnectOpts {
path: string;
}
type SocketConnectOpts = TcpSocketConnectOpts | IpcSocketConnectOpts;
type SocketReadyState = "opening" | "open" | "readOnly" | "writeOnly" | "closed";
interface SocketEventMap extends Omit<stream.DuplexEventMap, "close"> {
"close": [hadError: boolean];
"connect": [];
"connectionAttempt": [ip: string, port: number, family: number];
"connectionAttemptFailed": [ip: string, port: number, family: number, error: Error];
"connectionAttemptTimeout": [ip: string, port: number, family: number];
"data": [data: string | NonSharedBuffer];
"lookup": [err: Error | null, address: string, family: number | null, host: string];
"ready": [];
"timeout": [];
}
/**
* This class is an abstraction of a TCP socket or a streaming `IPC` endpoint
* (uses named pipes on Windows, and Unix domain sockets otherwise). It is also
* an `EventEmitter`.
*
* A `net.Socket` can be created by the user and used directly to interact with
* a server. For example, it is returned by {@link createConnection},
* so the user can use it to talk to the server.
*
* It can also be created by Node.js and passed to the user when a connection
* is received. For example, it is passed to the listeners of a `'connection'` event emitted on a {@link Server}, so the user can use
* it to interact with the client.
* @since v0.3.4
*/
class Socket extends stream.Duplex {
constructor(options?: SocketConstructorOpts);
/**
* Destroys the socket after all data is written. If the `finish` event was already emitted the socket is destroyed immediately.
* If the socket is still writable it implicitly calls `socket.end()`.
* @since v0.3.4
*/
destroySoon(): void;
/**
* Sends data on the socket. The second parameter specifies the encoding in the
* case of a string. It defaults to UTF8 encoding.
*
* Returns `true` if the entire data was flushed successfully to the kernel
* buffer. Returns `false` if all or part of the data was queued in user memory.`'drain'` will be emitted when the buffer is again free.
*
* The optional `callback` parameter will be executed when the data is finally
* written out, which may not be immediately.
*
* See `Writable` stream `write()` method for more
* information.
* @since v0.1.90
* @param [encoding='utf8'] Only used when data is `string`.
*/
write(buffer: Uint8Array | string, cb?: (err?: Error | null) => void): boolean;
write(str: Uint8Array | string, encoding?: BufferEncoding, cb?: (err?: Error | null) => void): boolean;
/**
* Initiate a connection on a given socket.
*
* Possible signatures:
*
* * `socket.connect(options[, connectListener])`
* * `socket.connect(path[, connectListener])` for `IPC` connections.
* * `socket.connect(port[, host][, connectListener])` for TCP connections.
* * Returns: `net.Socket` The socket itself.
*
* This function is asynchronous. When the connection is established, the `'connect'` event will be emitted. If there is a problem connecting,
* instead of a `'connect'` event, an `'error'` event will be emitted with
* the error passed to the `'error'` listener.
* The last parameter `connectListener`, if supplied, will be added as a listener
* for the `'connect'` event **once**.
*
* This function should only be used for reconnecting a socket after`'close'` has been emitted or otherwise it may lead to undefined
* behavior.
*/
connect(options: SocketConnectOpts, connectionListener?: () => void): this;
connect(port: number, host: string, connectionListener?: () => void): this;
connect(port: number, connectionListener?: () => void): this;
connect(path: string, connectionListener?: () => void): this;
/**
* Set the encoding for the socket as a `Readable Stream`. See `readable.setEncoding()` for more information.
* @since v0.1.90
* @return The socket itself.
*/
setEncoding(encoding?: BufferEncoding): this;
/**
* Pauses the reading of data. That is, `'data'` events will not be emitted.
* Useful to throttle back an upload.
* @return The socket itself.
*/
pause(): this;
/**
* Close the TCP connection by sending an RST packet and destroy the stream.
* If this TCP socket is in connecting status, it will send an RST packet and destroy this TCP socket once it is connected.
* Otherwise, it will call `socket.destroy` with an `ERR_SOCKET_CLOSED` Error.
* If this is not a TCP socket (for example, a pipe), calling this method will immediately throw an `ERR_INVALID_HANDLE_TYPE` Error.
* @since v18.3.0, v16.17.0
*/
resetAndDestroy(): this;
/**
* Resumes reading after a call to `socket.pause()`.
* @return The socket itself.
*/
resume(): this;
/**
* Sets the socket to timeout after `timeout` milliseconds of inactivity on
* the socket. By default `net.Socket` do not have a timeout.
*
* When an idle timeout is triggered the socket will receive a `'timeout'` event but the connection will not be severed. The user must manually call `socket.end()` or `socket.destroy()` to
* end the connection.
*
* ```js
* socket.setTimeout(3000);
* socket.on('timeout', () => {
* console.log('socket timeout');
* socket.end();
* });
* ```
*
* If `timeout` is 0, then the existing idle timeout is disabled.
*
* The optional `callback` parameter will be added as a one-time listener for the `'timeout'` event.
* @since v0.1.90
* @return The socket itself.
*/
setTimeout(timeout: number, callback?: () => void): this;
/**
* Enable/disable the use of Nagle's algorithm.
*
* When a TCP connection is created, it will have Nagle's algorithm enabled.
*
* Nagle's algorithm delays data before it is sent via the network. It attempts
* to optimize throughput at the expense of latency.
*
* Passing `true` for `noDelay` or not passing an argument will disable Nagle's
* algorithm for the socket. Passing `false` for `noDelay` will enable Nagle's
* algorithm.
* @since v0.1.90
* @param [noDelay=true]
* @return The socket itself.
*/
setNoDelay(noDelay?: boolean): this;
/**
* Enable/disable keep-alive functionality, and optionally set the initial
* delay before the first keepalive probe is sent on an idle socket.
*
* Set `initialDelay` (in milliseconds) to set the delay between the last
* data packet received and the first keepalive probe. Setting `0` for`initialDelay` will leave the value unchanged from the default
* (or previous) setting.
*
* Enabling the keep-alive functionality will set the following socket options:
*
* * `SO_KEEPALIVE=1`
* * `TCP_KEEPIDLE=initialDelay`
* * `TCP_KEEPCNT=10`
* * `TCP_KEEPINTVL=1`
* @since v0.1.92
* @param [enable=false]
* @param [initialDelay=0]
* @return The socket itself.
*/
setKeepAlive(enable?: boolean, initialDelay?: number): this;
/**
* Returns the bound `address`, the address `family` name and `port` of the
* socket as reported by the operating system:`{ port: 12346, family: 'IPv4', address: '127.0.0.1' }`
* @since v0.1.90
*/
address(): AddressInfo | {};
/**
* Calling `unref()` on a socket will allow the program to exit if this is the only
* active socket in the event system. If the socket is already `unref`ed calling`unref()` again will have no effect.
* @since v0.9.1
* @return The socket itself.
*/
unref(): this;
/**
* Opposite of `unref()`, calling `ref()` on a previously `unref`ed socket will _not_ let the program exit if it's the only socket left (the default behavior).
* If the socket is `ref`ed calling `ref` again will have no effect.
* @since v0.9.1
* @return The socket itself.
*/
ref(): this;
/**
* This property is only present if the family autoselection algorithm is enabled in `socket.connect(options)`
* and it is an array of the addresses that have been attempted.
*
* Each address is a string in the form of `$IP:$PORT`.
* If the connection was successful, then the last address is the one that the socket is currently connected to.
* @since v19.4.0
*/
readonly autoSelectFamilyAttemptedAddresses: string[];
/**
* This property shows the number of characters buffered for writing. The buffer
* may contain strings whose length after encoding is not yet known. So this number
* is only an approximation of the number of bytes in the buffer.
*
* `net.Socket` has the property that `socket.write()` always works. This is to
* help users get up and running quickly. The computer cannot always keep up
* with the amount of data that is written to a socket. The network connection
* simply might be too slow. Node.js will internally queue up the data written to a
* socket and send it out over the wire when it is possible.
*
* The consequence of this internal buffering is that memory may grow.
* Users who experience large or growing `bufferSize` should attempt to
* "throttle" the data flows in their program with `socket.pause()` and `socket.resume()`.
* @since v0.3.8
* @deprecated Since v14.6.0 - Use `writableLength` instead.
*/
readonly bufferSize: number;
/**
* The amount of received bytes.
* @since v0.5.3
*/
readonly bytesRead: number;
/**
* The amount of bytes sent.
* @since v0.5.3
*/
readonly bytesWritten: number;
/**
* If `true`, `socket.connect(options[, connectListener])` was
* called and has not yet finished. It will stay `true` until the socket becomes
* connected, then it is set to `false` and the `'connect'` event is emitted. Note
* that the `socket.connect(options[, connectListener])` callback is a listener for the `'connect'` event.
* @since v6.1.0
*/
readonly connecting: boolean;
/**
* This is `true` if the socket is not connected yet, either because `.connect()`has not yet been called or because it is still in the process of connecting
* (see `socket.connecting`).
* @since v11.2.0, v10.16.0
*/
readonly pending: boolean;
/**
* See `writable.destroyed` for further details.
*/
readonly destroyed: boolean;
/**
* The string representation of the local IP address the remote client is
* connecting on. For example, in a server listening on `'0.0.0.0'`, if a client
* connects on `'192.168.1.1'`, the value of `socket.localAddress` would be`'192.168.1.1'`.
* @since v0.9.6
*/
readonly localAddress?: string;
/**
* The numeric representation of the local port. For example, `80` or `21`.
* @since v0.9.6
*/
readonly localPort?: number;
/**
* The string representation of the local IP family. `'IPv4'` or `'IPv6'`.
* @since v18.8.0, v16.18.0
*/
readonly localFamily?: string;
/**
* This property represents the state of the connection as a string.
*
* * If the stream is connecting `socket.readyState` is `opening`.
* * If the stream is readable and writable, it is `open`.
* * If the stream is readable and not writable, it is `readOnly`.
* * If the stream is not readable and writable, it is `writeOnly`.
* @since v0.5.0
*/
readonly readyState: SocketReadyState;
/**
* The string representation of the remote IP address. For example,`'74.125.127.100'` or `'2001:4860:a005::68'`. Value may be `undefined` if
* the socket is destroyed (for example, if the client disconnected).
* @since v0.5.10
*/
readonly remoteAddress: string | undefined;
/**
* The string representation of the remote IP family. `'IPv4'` or `'IPv6'`. Value may be `undefined` if
* the socket is destroyed (for example, if the client disconnected).
* @since v0.11.14
*/
readonly remoteFamily: string | undefined;
/**
* The numeric representation of the remote port. For example, `80` or `21`. Value may be `undefined` if
* the socket is destroyed (for example, if the client disconnected).
* @since v0.5.10
*/
readonly remotePort: number | undefined;
/**
* The socket timeout in milliseconds as set by `socket.setTimeout()`.
* It is `undefined` if a timeout has not been set.
* @since v10.7.0
*/
readonly timeout?: number;
/**
* Half-closes the socket. i.e., it sends a FIN packet. It is possible the
* server will still send some data.
*
* See `writable.end()` for further details.
* @since v0.1.90
* @param [encoding='utf8'] Only used when data is `string`.
* @param callback Optional callback for when the socket is finished.
* @return The socket itself.
*/
end(callback?: () => void): this;
end(buffer: Uint8Array | string, callback?: () => void): this;
end(str: Uint8Array | string, encoding?: BufferEncoding, callback?: () => void): this;
// #region InternalEventEmitter
addListener<E extends keyof SocketEventMap>(eventName: E, listener: (...args: SocketEventMap[E]) => void): this;
addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
emit<E extends keyof SocketEventMap>(eventName: E, ...args: SocketEventMap[E]): boolean;
emit(eventName: string | symbol, ...args: any[]): boolean;
listenerCount<E extends keyof SocketEventMap>(
eventName: E,
listener?: (...args: SocketEventMap[E]) => void,
): number;
listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
listeners<E extends keyof SocketEventMap>(eventName: E): ((...args: SocketEventMap[E]) => void)[];
listeners(eventName: string | symbol): ((...args: any[]) => void)[];
off<E extends keyof SocketEventMap>(eventName: E, listener: (...args: SocketEventMap[E]) => void): this;
off(eventName: string | symbol, listener: (...args: any[]) => void): this;
on<E extends keyof SocketEventMap>(eventName: E, listener: (...args: SocketEventMap[E]) => void): this;
on(eventName: string | symbol, listener: (...args: any[]) => void): this;
once<E extends keyof SocketEventMap>(eventName: E, listener: (...args: SocketEventMap[E]) => void): this;
once(eventName: string | symbol, listener: (...args: any[]) => void): this;
prependListener<E extends keyof SocketEventMap>(
eventName: E,
listener: (...args: SocketEventMap[E]) => void,
): this;
prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
prependOnceListener<E extends keyof SocketEventMap>(
eventName: E,
listener: (...args: SocketEventMap[E]) => void,
): this;
prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
rawListeners<E extends keyof SocketEventMap>(eventName: E): ((...args: SocketEventMap[E]) => void)[];
rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
// eslint-disable-next-line @definitelytyped/no-unnecessary-generics
removeAllListeners<E extends keyof SocketEventMap>(eventName?: E): this;
removeAllListeners(eventName?: string | symbol): this;
removeListener<E extends keyof SocketEventMap>(
eventName: E,
listener: (...args: SocketEventMap[E]) => void,
): this;
removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
// #endregion
}
interface ListenOptions extends Abortable {
backlog?: number | undefined;
exclusive?: boolean | undefined;
host?: string | undefined;
/**
* @default false
*/
ipv6Only?: boolean | undefined;
reusePort?: boolean | undefined;
path?: string | undefined;
port?: number | undefined;
readableAll?: boolean | undefined;
writableAll?: boolean | undefined;
}
interface ServerOpts {
/**
* Indicates whether half-opened TCP connections are allowed.
* @default false
*/
allowHalfOpen?: boolean | undefined;
/**
* Indicates whether the socket should be paused on incoming connections.
* @default false
*/
pauseOnConnect?: boolean | undefined;
/**
* If set to `true`, it disables the use of Nagle's algorithm immediately after a new incoming connection is received.
* @default false
* @since v16.5.0
*/
noDelay?: boolean | undefined;
/**
* If set to `true`, it enables keep-alive functionality on the socket immediately after a new incoming connection is received,
* similarly on what is done in `socket.setKeepAlive([enable][, initialDelay])`.
* @default false
* @since v16.5.0
*/
keepAlive?: boolean | undefined;
/**
* If set to a positive number, it sets the initial delay before the first keepalive probe is sent on an idle socket.
* @default 0
* @since v16.5.0
*/
keepAliveInitialDelay?: number | undefined;
/**
* Optionally overrides all `net.Socket`s' `readableHighWaterMark` and `writableHighWaterMark`.
* @default See [stream.getDefaultHighWaterMark()](https://nodejs.org/docs/latest-v25.x/api/stream.html#streamgetdefaulthighwatermarkobjectmode).
* @since v18.17.0, v20.1.0
*/
highWaterMark?: number | undefined;
/**
* `blockList` can be used for disabling inbound
* access to specific IP addresses, IP ranges, or IP subnets. This does not
* work if the server is behind a reverse proxy, NAT, etc. because the address
* checked against the block list is the address of the proxy, or the one
* specified by the NAT.
* @since v22.13.0
*/
blockList?: BlockList | undefined;
}
interface DropArgument {
localAddress?: string;
localPort?: number;
localFamily?: string;
remoteAddress?: string;
remotePort?: number;
remoteFamily?: string;
}
interface ServerEventMap {
"close": [];
"connection": [socket: Socket];
"error": [err: Error];
"listening": [];
"drop": [data?: DropArgument];
}
/**
* This class is used to create a TCP or `IPC` server.
* @since v0.1.90
*/
class Server implements EventEmitter {
constructor(connectionListener?: (socket: Socket) => void);
constructor(options?: ServerOpts, connectionListener?: (socket: Socket) => void);
/**
* Start a server listening for connections. A `net.Server` can be a TCP or
* an `IPC` server depending on what it listens to.
*
* Possible signatures:
*
* * `server.listen(handle[, backlog][, callback])`
* * `server.listen(options[, callback])`
* * `server.listen(path[, backlog][, callback])` for `IPC` servers
* * `server.listen([port[, host[, backlog]]][, callback])` for TCP servers
*
* This function is asynchronous. When the server starts listening, the `'listening'` event will be emitted. The last parameter `callback`will be added as a listener for the `'listening'`
* event.
*
* All `listen()` methods can take a `backlog` parameter to specify the maximum
* length of the queue of pending connections. The actual length will be determined
* by the OS through sysctl settings such as `tcp_max_syn_backlog` and `somaxconn` on Linux. The default value of this parameter is 511 (not 512).
*
* All {@link Socket} are set to `SO_REUSEADDR` (see [`socket(7)`](https://man7.org/linux/man-pages/man7/socket.7.html) for
* details).
*
* The `server.listen()` method can be called again if and only if there was an
* error during the first `server.listen()` call or `server.close()` has been
* called. Otherwise, an `ERR_SERVER_ALREADY_LISTEN` error will be thrown.
*
* One of the most common errors raised when listening is `EADDRINUSE`.
* This happens when another server is already listening on the requested`port`/`path`/`handle`. One way to handle this would be to retry
* after a certain amount of time:
*
* ```js
* server.on('error', (e) => {
* if (e.code === 'EADDRINUSE') {
* console.error('Address in use, retrying...');
* setTimeout(() => {
* server.close();
* server.listen(PORT, HOST);
* }, 1000);
* }
* });
* ```
*/
listen(port?: number, hostname?: string, backlog?: number, listeningListener?: () => void): this;
listen(port?: number, hostname?: string, listeningListener?: () => void): this;
listen(port?: number, backlog?: number, listeningListener?: () => void): this;
listen(port?: number, listeningListener?: () => void): this;
listen(path: string, backlog?: number, listeningListener?: () => void): this;
listen(path: string, listeningListener?: () => void): this;
listen(options: ListenOptions, listeningListener?: () => void): this;
listen(handle: any, backlog?: number, listeningListener?: () => void): this;
listen(handle: any, listeningListener?: () => void): this;
/**
* Stops the server from accepting new connections and keeps existing
* connections. This function is asynchronous, the server is finally closed
* when all connections are ended and the server emits a `'close'` event.
* The optional `callback` will be called once the `'close'` event occurs. Unlike
* that event, it will be called with an `Error` as its only argument if the server
* was not open when it was closed.
* @since v0.1.90
* @param callback Called when the server is closed.
*/
close(callback?: (err?: Error) => void): this;
/**
* Returns the bound `address`, the address `family` name, and `port` of the server
* as reported by the operating system if listening on an IP socket
* (useful to find which port was assigned when getting an OS-assigned address):`{ port: 12346, family: 'IPv4', address: '127.0.0.1' }`.
*
* For a server listening on a pipe or Unix domain socket, the name is returned
* as a string.
*
* ```js
* const server = net.createServer((socket) => {
* socket.end('goodbye\n');
* }).on('error', (err) => {
* // Handle errors here.
* throw err;
* });
*
* // Grab an arbitrary unused port.
* server.listen(() => {
* console.log('opened server on', server.address());
* });
* ```
*
* `server.address()` returns `null` before the `'listening'` event has been
* emitted or after calling `server.close()`.
* @since v0.1.90
*/
address(): AddressInfo | string | null;
/**
* Asynchronously get the number of concurrent connections on the server. Works
* when sockets were sent to forks.
*
* Callback should take two arguments `err` and `count`.
* @since v0.9.7
*/
getConnections(cb: (error: Error | null, count: number) => void): this;
/**
* Opposite of `unref()`, calling `ref()` on a previously `unref`ed server will _not_ let the program exit if it's the only server left (the default behavior).
* If the server is `ref`ed calling `ref()` again will have no effect.
* @since v0.9.1
*/
ref(): this;
/**
* Calling `unref()` on a server will allow the program to exit if this is the only
* active server in the event system. If the server is already `unref`ed calling`unref()` again will have no effect.
* @since v0.9.1
*/
unref(): this;
/**
* Set this property to reject connections when the server's connection count gets
* high.
*
* It is not recommended to use this option once a socket has been sent to a child
* with `child_process.fork()`.
* @since v0.2.0
*/
maxConnections: number;
connections: number;
/**
* Indicates whether or not the server is listening for connections.
* @since v5.7.0
*/
readonly listening: boolean;
/**
* Calls {@link Server.close()} and returns a promise that fulfills when the server has closed.
* @since v20.5.0
*/
[Symbol.asyncDispose](): Promise<void>;
}
interface Server extends InternalEventEmitter<ServerEventMap> {}
type IPVersion = "ipv4" | "ipv6";
/**
* The `BlockList` object can be used with some network APIs to specify rules for
* disabling inbound or outbound access to specific IP addresses, IP ranges, or
* IP subnets.
* @since v15.0.0, v14.18.0
*/
class BlockList {
/**
* Adds a rule to block the given IP address.
* @since v15.0.0, v14.18.0
* @param address An IPv4 or IPv6 address.
* @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
*/
addAddress(address: string, type?: IPVersion): void;
addAddress(address: SocketAddress): void;
/**
* Adds a rule to block a range of IP addresses from `start` (inclusive) to`end` (inclusive).
* @since v15.0.0, v14.18.0
* @param start The starting IPv4 or IPv6 address in the range.
* @param end The ending IPv4 or IPv6 address in the range.
* @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
*/
addRange(start: string, end: string, type?: IPVersion): void;
addRange(start: SocketAddress, end: SocketAddress): void;
/**
* Adds a rule to block a range of IP addresses specified as a subnet mask.
* @since v15.0.0, v14.18.0
* @param net The network IPv4 or IPv6 address.
* @param prefix The number of CIDR prefix bits. For IPv4, this must be a value between `0` and `32`. For IPv6, this must be between `0` and `128`.
* @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
*/
addSubnet(net: SocketAddress, prefix: number): void;
addSubnet(net: string, prefix: number, type?: IPVersion): void;
/**
* Returns `true` if the given IP address matches any of the rules added to the`BlockList`.
*
* ```js
* const blockList = new net.BlockList();
* blockList.addAddress('123.123.123.123');
* blockList.addRange('10.0.0.1', '10.0.0.10');
* blockList.addSubnet('8592:757c:efae:4e45::', 64, 'ipv6');
*
* console.log(blockList.check('123.123.123.123')); // Prints: true
* console.log(blockList.check('10.0.0.3')); // Prints: true
* console.log(blockList.check('222.111.111.222')); // Prints: false
*
* // IPv6 notation for IPv4 addresses works:
* console.log(blockList.check('::ffff:7b7b:7b7b', 'ipv6')); // Prints: true
* console.log(blockList.check('::ffff:123.123.123.123', 'ipv6')); // Prints: true
* ```
* @since v15.0.0, v14.18.0
* @param address The IP address to check
* @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
*/
check(address: SocketAddress): boolean;
check(address: string, type?: IPVersion): boolean;
/**
* The list of rules added to the blocklist.
* @since v15.0.0, v14.18.0
*/
rules: readonly string[];
/**
* Returns `true` if the `value` is a `net.BlockList`.
* @since v22.13.0
* @param value Any JS value
*/
static isBlockList(value: unknown): value is BlockList;
/**
* ```js
* const blockList = new net.BlockList();
* const data = [
* 'Subnet: IPv4 192.168.1.0/24',
* 'Address: IPv4 10.0.0.5',
* 'Range: IPv4 192.168.2.1-192.168.2.10',
* 'Range: IPv4 10.0.0.1-10.0.0.10',
* ];
* blockList.fromJSON(data);
* blockList.fromJSON(JSON.stringify(data));
* ```
* @since v24.5.0
* @experimental
*/
fromJSON(data: string | readonly string[]): void;
/**
* @since v24.5.0
* @experimental
*/
toJSON(): readonly string[];
}
interface TcpNetConnectOpts extends TcpSocketConnectOpts, SocketConstructorOpts {
timeout?: number | undefined;
}
interface IpcNetConnectOpts extends IpcSocketConnectOpts, SocketConstructorOpts {
timeout?: number | undefined;
}
type NetConnectOpts = TcpNetConnectOpts | IpcNetConnectOpts;
/**
* Creates a new TCP or `IPC` server.
*
* If `allowHalfOpen` is set to `true`, when the other end of the socket
* signals the end of transmission, the server will only send back the end of
* transmission when `socket.end()` is explicitly called. For example, in the
* context of TCP, when a FIN packed is received, a FIN packed is sent
* back only when `socket.end()` is explicitly called. Until then the
* connection is half-closed (non-readable but still writable). See `'end'` event and [RFC 1122](https://tools.ietf.org/html/rfc1122) (section 4.2.2.13) for more information.
*
* If `pauseOnConnect` is set to `true`, then the socket associated with each
* incoming connection will be paused, and no data will be read from its handle.
* This allows connections to be passed between processes without any data being
* read by the original process. To begin reading data from a paused socket, call `socket.resume()`.
*
* The server can be a TCP server or an `IPC` server, depending on what it `listen()` to.
*
* Here is an example of a TCP echo server which listens for connections
* on port 8124:
*
* ```js
* import net from 'node:net';
* const server = net.createServer((c) => {
* // 'connection' listener.
* console.log('client connected');
* c.on('end', () => {
* console.log('client disconnected');
* });
* c.write('hello\r\n');
* c.pipe(c);
* });
* server.on('error', (err) => {
* throw err;
* });
* server.listen(8124, () => {
* console.log('server bound');
* });
* ```
*
* Test this by using `telnet`:
*
* ```bash
* telnet localhost 8124
* ```
*
* To listen on the socket `/tmp/echo.sock`:
*
* ```js
* server.listen('/tmp/echo.sock', () => {
* console.log('server bound');
* });
* ```
*
* Use `nc` to connect to a Unix domain socket server:
*
* ```bash
* nc -U /tmp/echo.sock
* ```
* @since v0.5.0
* @param connectionListener Automatically set as a listener for the {@link 'connection'} event.
*/
function createServer(connectionListener?: (socket: Socket) => void): Server;
function createServer(options?: ServerOpts, connectionListener?: (socket: Socket) => void): Server;
/**
* Aliases to {@link createConnection}.
*
* Possible signatures:
*
* * {@link connect}
* * {@link connect} for `IPC` connections.
* * {@link connect} for TCP connections.
*/
function connect(options: NetConnectOpts, connectionListener?: () => void): Socket;
function connect(port: number, host?: string, connectionListener?: () => void): Socket;
function connect(path: string, connectionListener?: () => void): Socket;
/**
* A factory function, which creates a new {@link Socket},
* immediately initiates connection with `socket.connect()`,
* then returns the `net.Socket` that starts the connection.
*
* When the connection is established, a `'connect'` event will be emitted
* on the returned socket. The last parameter `connectListener`, if supplied,
* will be added as a listener for the `'connect'` event **once**.
*
* Possible signatures:
*
* * {@link createConnection}
* * {@link createConnection} for `IPC` connections.
* * {@link createConnection} for TCP connections.
*
* The {@link connect} function is an alias to this function.
*/
function createConnection(options: NetConnectOpts, connectionListener?: () => void): Socket;
function createConnection(port: number, host?: string, connectionListener?: () => void): Socket;
function createConnection(path: string, connectionListener?: () => void): Socket;
/**
* Gets the current default value of the `autoSelectFamily` option of `socket.connect(options)`.
* The initial default value is `true`, unless the command line option`--no-network-family-autoselection` is provided.
* @since v19.4.0
*/
function getDefaultAutoSelectFamily(): boolean;
/**
* Sets the default value of the `autoSelectFamily` option of `socket.connect(options)`.
* @param value The new default value.
* The initial default value is `true`, unless the command line option
* `--no-network-family-autoselection` is provided.
* @since v19.4.0
*/
function setDefaultAutoSelectFamily(value: boolean): void;
/**
* Gets the current default value of the `autoSelectFamilyAttemptTimeout` option of `socket.connect(options)`.
* The initial default value is `500` or the value specified via the command line option `--network-family-autoselection-attempt-timeout`.
* @returns The current default value of the `autoSelectFamilyAttemptTimeout` option.
* @since v19.8.0, v18.8.0
*/
function getDefaultAutoSelectFamilyAttemptTimeout(): number;
/**
* Sets the default value of the `autoSelectFamilyAttemptTimeout` option of `socket.connect(options)`.
* @param value The new default value, which must be a positive number. If the number is less than `10`, the value `10` is used instead. The initial default value is `250` or the value specified via the command line
* option `--network-family-autoselection-attempt-timeout`.
* @since v19.8.0, v18.8.0
*/
function setDefaultAutoSelectFamilyAttemptTimeout(value: number): void;
/**
* Returns `6` if `input` is an IPv6 address. Returns `4` if `input` is an IPv4
* address in [dot-decimal notation](https://en.wikipedia.org/wiki/Dot-decimal_notation) with no leading zeroes. Otherwise, returns`0`.
*
* ```js
* net.isIP('::1'); // returns 6
* net.isIP('127.0.0.1'); // returns 4
* net.isIP('127.000.000.001'); // returns 0
* net.isIP('127.0.0.1/24'); // returns 0
* net.isIP('fhqwhgads'); // returns 0
* ```
* @since v0.3.0
*/
function isIP(input: string): number;
/**
* Returns `true` if `input` is an IPv4 address in [dot-decimal notation](https://en.wikipedia.org/wiki/Dot-decimal_notation) with no
* leading zeroes. Otherwise, returns `false`.
*
* ```js
* net.isIPv4('127.0.0.1'); // returns true
* net.isIPv4('127.000.000.001'); // returns false
* net.isIPv4('127.0.0.1/24'); // returns false
* net.isIPv4('fhqwhgads'); // returns false
* ```
* @since v0.3.0
*/
function isIPv4(input: string): boolean;
/**
* Returns `true` if `input` is an IPv6 address. Otherwise, returns `false`.
*
* ```js
* net.isIPv6('::1'); // returns true
* net.isIPv6('fhqwhgads'); // returns false
* ```
* @since v0.3.0
*/
function isIPv6(input: string): boolean;
interface SocketAddressInitOptions {
/**
* The network address as either an IPv4 or IPv6 string.
* @default 127.0.0.1
*/
address?: string | undefined;
/**
* @default `'ipv4'`
*/
family?: IPVersion | undefined;
/**
* An IPv6 flow-label used only if `family` is `'ipv6'`.
* @default 0
*/
flowlabel?: number | undefined;
/**
* An IP port.
* @default 0
*/
port?: number | undefined;
}
/**
* @since v15.14.0, v14.18.0
*/
class SocketAddress {
constructor(options: SocketAddressInitOptions);
/**
* Either \`'ipv4'\` or \`'ipv6'\`.
* @since v15.14.0, v14.18.0
*/
readonly address: string;
/**
* Either \`'ipv4'\` or \`'ipv6'\`.
* @since v15.14.0, v14.18.0
*/
readonly family: IPVersion;
/**
* @since v15.14.0, v14.18.0
*/
readonly port: number;
/**
* @since v15.14.0, v14.18.0
*/
readonly flowlabel: number;
/**
* @since v22.13.0
* @param input An input string containing an IP address and optional port,
* e.g. `123.1.2.3:1234` or `[1::1]:1234`.
* @returns Returns a `SocketAddress` if parsing was successful.
* Otherwise returns `undefined`.
*/
static parse(input: string): SocketAddress | undefined;
}
}
declare module "net" {
export * from "node:net";
}

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/**
* The `node:os` module provides operating system-related utility methods and
* properties. It can be accessed using:
*
* ```js
* import os from 'node:os';
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/os.js)
*/
declare module "node:os" {
import { NonSharedBuffer } from "buffer";
interface CpuInfo {
model: string;
speed: number;
times: {
/** The number of milliseconds the CPU has spent in user mode. */
user: number;
/** The number of milliseconds the CPU has spent in nice mode. */
nice: number;
/** The number of milliseconds the CPU has spent in sys mode. */
sys: number;
/** The number of milliseconds the CPU has spent in idle mode. */
idle: number;
/** The number of milliseconds the CPU has spent in irq mode. */
irq: number;
};
}
interface NetworkInterfaceBase {
address: string;
netmask: string;
mac: string;
internal: boolean;
cidr: string | null;
scopeid?: number;
}
interface NetworkInterfaceInfoIPv4 extends NetworkInterfaceBase {
family: "IPv4";
}
interface NetworkInterfaceInfoIPv6 extends NetworkInterfaceBase {
family: "IPv6";
scopeid: number;
}
interface UserInfo<T> {
username: T;
uid: number;
gid: number;
shell: T | null;
homedir: T;
}
type NetworkInterfaceInfo = NetworkInterfaceInfoIPv4 | NetworkInterfaceInfoIPv6;
/**
* Returns the host name of the operating system as a string.
* @since v0.3.3
*/
function hostname(): string;
/**
* Returns an array containing the 1, 5, and 15 minute load averages.
*
* The load average is a measure of system activity calculated by the operating
* system and expressed as a fractional number.
*
* The load average is a Unix-specific concept. On Windows, the return value is
* always `[0, 0, 0]`.
* @since v0.3.3
*/
function loadavg(): number[];
/**
* Returns the system uptime in number of seconds.
* @since v0.3.3
*/
function uptime(): number;
/**
* Returns the amount of free system memory in bytes as an integer.
* @since v0.3.3
*/
function freemem(): number;
/**
* Returns the total amount of system memory in bytes as an integer.
* @since v0.3.3
*/
function totalmem(): number;
/**
* Returns an array of objects containing information about each logical CPU core.
* The array will be empty if no CPU information is available, such as if the `/proc` file system is unavailable.
*
* The properties included on each object include:
*
* ```js
* [
* {
* model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
* speed: 2926,
* times: {
* user: 252020,
* nice: 0,
* sys: 30340,
* idle: 1070356870,
* irq: 0,
* },
* },
* {
* model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
* speed: 2926,
* times: {
* user: 306960,
* nice: 0,
* sys: 26980,
* idle: 1071569080,
* irq: 0,
* },
* },
* {
* model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
* speed: 2926,
* times: {
* user: 248450,
* nice: 0,
* sys: 21750,
* idle: 1070919370,
* irq: 0,
* },
* },
* {
* model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
* speed: 2926,
* times: {
* user: 256880,
* nice: 0,
* sys: 19430,
* idle: 1070905480,
* irq: 20,
* },
* },
* ]
* ```
*
* `nice` values are POSIX-only. On Windows, the `nice` values of all processors
* are always 0.
*
* `os.cpus().length` should not be used to calculate the amount of parallelism
* available to an application. Use {@link availableParallelism} for this purpose.
* @since v0.3.3
*/
function cpus(): CpuInfo[];
/**
* Returns an estimate of the default amount of parallelism a program should use.
* Always returns a value greater than zero.
*
* This function is a small wrapper about libuv's [`uv_available_parallelism()`](https://docs.libuv.org/en/v1.x/misc.html#c.uv_available_parallelism).
* @since v19.4.0, v18.14.0
*/
function availableParallelism(): number;
/**
* Returns the operating system name as returned by [`uname(3)`](https://linux.die.net/man/3/uname). For example, it
* returns `'Linux'` on Linux, `'Darwin'` on macOS, and `'Windows_NT'` on Windows.
*
* See [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for additional information
* about the output of running [`uname(3)`](https://linux.die.net/man/3/uname) on various operating systems.
* @since v0.3.3
*/
function type(): string;
/**
* Returns the operating system as a string.
*
* On POSIX systems, the operating system release is determined by calling [`uname(3)`](https://linux.die.net/man/3/uname). On Windows, `GetVersionExW()` is used. See
* [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for more information.
* @since v0.3.3
*/
function release(): string;
/**
* Returns an object containing network interfaces that have been assigned a
* network address.
*
* Each key on the returned object identifies a network interface. The associated
* value is an array of objects that each describe an assigned network address.
*
* The properties available on the assigned network address object include:
*
* ```js
* {
* lo: [
* {
* address: '127.0.0.1',
* netmask: '255.0.0.0',
* family: 'IPv4',
* mac: '00:00:00:00:00:00',
* internal: true,
* cidr: '127.0.0.1/8'
* },
* {
* address: '::1',
* netmask: 'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff',
* family: 'IPv6',
* mac: '00:00:00:00:00:00',
* scopeid: 0,
* internal: true,
* cidr: '::1/128'
* }
* ],
* eth0: [
* {
* address: '192.168.1.108',
* netmask: '255.255.255.0',
* family: 'IPv4',
* mac: '01:02:03:0a:0b:0c',
* internal: false,
* cidr: '192.168.1.108/24'
* },
* {
* address: 'fe80::a00:27ff:fe4e:66a1',
* netmask: 'ffff:ffff:ffff:ffff::',
* family: 'IPv6',
* mac: '01:02:03:0a:0b:0c',
* scopeid: 1,
* internal: false,
* cidr: 'fe80::a00:27ff:fe4e:66a1/64'
* }
* ]
* }
* ```
* @since v0.6.0
*/
function networkInterfaces(): NodeJS.Dict<NetworkInterfaceInfo[]>;
/**
* Returns the string path of the current user's home directory.
*
* On POSIX, it uses the `$HOME` environment variable if defined. Otherwise it
* uses the [effective UID](https://en.wikipedia.org/wiki/User_identifier#Effective_user_ID) to look up the user's home directory.
*
* On Windows, it uses the `USERPROFILE` environment variable if defined.
* Otherwise it uses the path to the profile directory of the current user.
* @since v2.3.0
*/
function homedir(): string;
interface UserInfoOptions {
encoding?: BufferEncoding | "buffer" | undefined;
}
interface UserInfoOptionsWithBufferEncoding extends UserInfoOptions {
encoding: "buffer";
}
interface UserInfoOptionsWithStringEncoding extends UserInfoOptions {
encoding?: BufferEncoding | undefined;
}
/**
* Returns information about the currently effective user. On POSIX platforms,
* this is typically a subset of the password file. The returned object includes
* the `username`, `uid`, `gid`, `shell`, and `homedir`. On Windows, the `uid` and `gid` fields are `-1`, and `shell` is `null`.
*
* The value of `homedir` returned by `os.userInfo()` is provided by the operating
* system. This differs from the result of `os.homedir()`, which queries
* environment variables for the home directory before falling back to the
* operating system response.
*
* Throws a [`SystemError`](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-systemerror) if a user has no `username` or `homedir`.
* @since v6.0.0
*/
function userInfo(options?: UserInfoOptionsWithStringEncoding): UserInfo<string>;
function userInfo(options: UserInfoOptionsWithBufferEncoding): UserInfo<NonSharedBuffer>;
function userInfo(options: UserInfoOptions): UserInfo<string | NonSharedBuffer>;
type SignalConstants = {
[key in NodeJS.Signals]: number;
};
namespace constants {
const UV_UDP_REUSEADDR: number;
namespace signals {}
const signals: SignalConstants;
namespace errno {
const E2BIG: number;
const EACCES: number;
const EADDRINUSE: number;
const EADDRNOTAVAIL: number;
const EAFNOSUPPORT: number;
const EAGAIN: number;
const EALREADY: number;
const EBADF: number;
const EBADMSG: number;
const EBUSY: number;
const ECANCELED: number;
const ECHILD: number;
const ECONNABORTED: number;
const ECONNREFUSED: number;
const ECONNRESET: number;
const EDEADLK: number;
const EDESTADDRREQ: number;
const EDOM: number;
const EDQUOT: number;
const EEXIST: number;
const EFAULT: number;
const EFBIG: number;
const EHOSTUNREACH: number;
const EIDRM: number;
const EILSEQ: number;
const EINPROGRESS: number;
const EINTR: number;
const EINVAL: number;
const EIO: number;
const EISCONN: number;
const EISDIR: number;
const ELOOP: number;
const EMFILE: number;
const EMLINK: number;
const EMSGSIZE: number;
const EMULTIHOP: number;
const ENAMETOOLONG: number;
const ENETDOWN: number;
const ENETRESET: number;
const ENETUNREACH: number;
const ENFILE: number;
const ENOBUFS: number;
const ENODATA: number;
const ENODEV: number;
const ENOENT: number;
const ENOEXEC: number;
const ENOLCK: number;
const ENOLINK: number;
const ENOMEM: number;
const ENOMSG: number;
const ENOPROTOOPT: number;
const ENOSPC: number;
const ENOSR: number;
const ENOSTR: number;
const ENOSYS: number;
const ENOTCONN: number;
const ENOTDIR: number;
const ENOTEMPTY: number;
const ENOTSOCK: number;
const ENOTSUP: number;
const ENOTTY: number;
const ENXIO: number;
const EOPNOTSUPP: number;
const EOVERFLOW: number;
const EPERM: number;
const EPIPE: number;
const EPROTO: number;
const EPROTONOSUPPORT: number;
const EPROTOTYPE: number;
const ERANGE: number;
const EROFS: number;
const ESPIPE: number;
const ESRCH: number;
const ESTALE: number;
const ETIME: number;
const ETIMEDOUT: number;
const ETXTBSY: number;
const EWOULDBLOCK: number;
const EXDEV: number;
const WSAEINTR: number;
const WSAEBADF: number;
const WSAEACCES: number;
const WSAEFAULT: number;
const WSAEINVAL: number;
const WSAEMFILE: number;
const WSAEWOULDBLOCK: number;
const WSAEINPROGRESS: number;
const WSAEALREADY: number;
const WSAENOTSOCK: number;
const WSAEDESTADDRREQ: number;
const WSAEMSGSIZE: number;
const WSAEPROTOTYPE: number;
const WSAENOPROTOOPT: number;
const WSAEPROTONOSUPPORT: number;
const WSAESOCKTNOSUPPORT: number;
const WSAEOPNOTSUPP: number;
const WSAEPFNOSUPPORT: number;
const WSAEAFNOSUPPORT: number;
const WSAEADDRINUSE: number;
const WSAEADDRNOTAVAIL: number;
const WSAENETDOWN: number;
const WSAENETUNREACH: number;
const WSAENETRESET: number;
const WSAECONNABORTED: number;
const WSAECONNRESET: number;
const WSAENOBUFS: number;
const WSAEISCONN: number;
const WSAENOTCONN: number;
const WSAESHUTDOWN: number;
const WSAETOOMANYREFS: number;
const WSAETIMEDOUT: number;
const WSAECONNREFUSED: number;
const WSAELOOP: number;
const WSAENAMETOOLONG: number;
const WSAEHOSTDOWN: number;
const WSAEHOSTUNREACH: number;
const WSAENOTEMPTY: number;
const WSAEPROCLIM: number;
const WSAEUSERS: number;
const WSAEDQUOT: number;
const WSAESTALE: number;
const WSAEREMOTE: number;
const WSASYSNOTREADY: number;
const WSAVERNOTSUPPORTED: number;
const WSANOTINITIALISED: number;
const WSAEDISCON: number;
const WSAENOMORE: number;
const WSAECANCELLED: number;
const WSAEINVALIDPROCTABLE: number;
const WSAEINVALIDPROVIDER: number;
const WSAEPROVIDERFAILEDINIT: number;
const WSASYSCALLFAILURE: number;
const WSASERVICE_NOT_FOUND: number;
const WSATYPE_NOT_FOUND: number;
const WSA_E_NO_MORE: number;
const WSA_E_CANCELLED: number;
const WSAEREFUSED: number;
}
namespace dlopen {
const RTLD_LAZY: number;
const RTLD_NOW: number;
const RTLD_GLOBAL: number;
const RTLD_LOCAL: number;
const RTLD_DEEPBIND: number;
}
namespace priority {
const PRIORITY_LOW: number;
const PRIORITY_BELOW_NORMAL: number;
const PRIORITY_NORMAL: number;
const PRIORITY_ABOVE_NORMAL: number;
const PRIORITY_HIGH: number;
const PRIORITY_HIGHEST: number;
}
}
const devNull: string;
/**
* The operating system-specific end-of-line marker.
* * `\n` on POSIX
* * `\r\n` on Windows
*/
const EOL: string;
/**
* Returns the operating system CPU architecture for which the Node.js binary was
* compiled. Possible values are `'arm'`, `'arm64'`, `'ia32'`, `'loong64'`,
* `'mips'`, `'mipsel'`, `'ppc64'`, `'riscv64'`, `'s390x'`, and `'x64'`.
*
* The return value is equivalent to [process.arch](https://nodejs.org/docs/latest-v25.x/api/process.html#processarch).
* @since v0.5.0
*/
function arch(): NodeJS.Architecture;
/**
* Returns a string identifying the kernel version.
*
* On POSIX systems, the operating system release is determined by calling [`uname(3)`](https://linux.die.net/man/3/uname). On Windows, `RtlGetVersion()` is used, and if it is not
* available, `GetVersionExW()` will be used. See [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for more information.
* @since v13.11.0, v12.17.0
*/
function version(): string;
/**
* Returns a string identifying the operating system platform for which
* the Node.js binary was compiled. The value is set at compile time.
* Possible values are `'aix'`, `'darwin'`, `'freebsd'`, `'linux'`, `'openbsd'`, `'sunos'`, and `'win32'`.
*
* The return value is equivalent to `process.platform`.
*
* The value `'android'` may also be returned if Node.js is built on the Android
* operating system. [Android support is experimental](https://github.com/nodejs/node/blob/HEAD/BUILDING.md#androidandroid-based-devices-eg-firefox-os).
* @since v0.5.0
*/
function platform(): NodeJS.Platform;
/**
* Returns the machine type as a string, such as `arm`, `arm64`, `aarch64`,
* `mips`, `mips64`, `ppc64`, `ppc64le`, `s390x`, `i386`, `i686`, `x86_64`.
*
* On POSIX systems, the machine type is determined by calling [`uname(3)`](https://linux.die.net/man/3/uname). On Windows, `RtlGetVersion()` is used, and if it is not
* available, `GetVersionExW()` will be used. See [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for more information.
* @since v18.9.0, v16.18.0
*/
function machine(): string;
/**
* Returns the operating system's default directory for temporary files as a
* string.
* @since v0.9.9
*/
function tmpdir(): string;
/**
* Returns a string identifying the endianness of the CPU for which the Node.js
* binary was compiled.
*
* Possible values are `'BE'` for big endian and `'LE'` for little endian.
* @since v0.9.4
*/
function endianness(): "BE" | "LE";
/**
* Returns the scheduling priority for the process specified by `pid`. If `pid` is
* not provided or is `0`, the priority of the current process is returned.
* @since v10.10.0
* @param [pid=0] The process ID to retrieve scheduling priority for.
*/
function getPriority(pid?: number): number;
/**
* Attempts to set the scheduling priority for the process specified by `pid`. If `pid` is not provided or is `0`, the process ID of the current process is used.
*
* The `priority` input must be an integer between `-20` (high priority) and `19` (low priority). Due to differences between Unix priority levels and Windows
* priority classes, `priority` is mapped to one of six priority constants in `os.constants.priority`. When retrieving a process priority level, this range
* mapping may cause the return value to be slightly different on Windows. To avoid
* confusion, set `priority` to one of the priority constants.
*
* On Windows, setting priority to `PRIORITY_HIGHEST` requires elevated user
* privileges. Otherwise the set priority will be silently reduced to `PRIORITY_HIGH`.
* @since v10.10.0
* @param [pid=0] The process ID to set scheduling priority for.
* @param priority The scheduling priority to assign to the process.
*/
function setPriority(priority: number): void;
function setPriority(pid: number, priority: number): void;
}
declare module "os" {
export * from "node:os";
}

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{
"name": "@types/node",
"version": "25.5.0",
"description": "TypeScript definitions for node",
"homepage": "https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/node",
"license": "MIT",
"contributors": [
{
"name": "Microsoft TypeScript",
"githubUsername": "Microsoft",
"url": "https://github.com/Microsoft"
},
{
"name": "Alberto Schiabel",
"githubUsername": "jkomyno",
"url": "https://github.com/jkomyno"
},
{
"name": "Andrew Makarov",
"githubUsername": "r3nya",
"url": "https://github.com/r3nya"
},
{
"name": "Benjamin Toueg",
"githubUsername": "btoueg",
"url": "https://github.com/btoueg"
},
{
"name": "David Junger",
"githubUsername": "touffy",
"url": "https://github.com/touffy"
},
{
"name": "Mohsen Azimi",
"githubUsername": "mohsen1",
"url": "https://github.com/mohsen1"
},
{
"name": "Nikita Galkin",
"githubUsername": "galkin",
"url": "https://github.com/galkin"
},
{
"name": "Sebastian Silbermann",
"githubUsername": "eps1lon",
"url": "https://github.com/eps1lon"
},
{
"name": "Wilco Bakker",
"githubUsername": "WilcoBakker",
"url": "https://github.com/WilcoBakker"
},
{
"name": "Marcin Kopacz",
"githubUsername": "chyzwar",
"url": "https://github.com/chyzwar"
},
{
"name": "Trivikram Kamat",
"githubUsername": "trivikr",
"url": "https://github.com/trivikr"
},
{
"name": "Junxiao Shi",
"githubUsername": "yoursunny",
"url": "https://github.com/yoursunny"
},
{
"name": "Ilia Baryshnikov",
"githubUsername": "qwelias",
"url": "https://github.com/qwelias"
},
{
"name": "ExE Boss",
"githubUsername": "ExE-Boss",
"url": "https://github.com/ExE-Boss"
},
{
"name": "Piotr Błażejewicz",
"githubUsername": "peterblazejewicz",
"url": "https://github.com/peterblazejewicz"
},
{
"name": "Anna Henningsen",
"githubUsername": "addaleax",
"url": "https://github.com/addaleax"
},
{
"name": "Victor Perin",
"githubUsername": "victorperin",
"url": "https://github.com/victorperin"
},
{
"name": "NodeJS Contributors",
"githubUsername": "NodeJS",
"url": "https://github.com/NodeJS"
},
{
"name": "Linus Unnebäck",
"githubUsername": "LinusU",
"url": "https://github.com/LinusU"
},
{
"name": "wafuwafu13",
"githubUsername": "wafuwafu13",
"url": "https://github.com/wafuwafu13"
},
{
"name": "Matteo Collina",
"githubUsername": "mcollina",
"url": "https://github.com/mcollina"
},
{
"name": "Dmitry Semigradsky",
"githubUsername": "Semigradsky",
"url": "https://github.com/Semigradsky"
},
{
"name": "René",
"githubUsername": "Renegade334",
"url": "https://github.com/Renegade334"
},
{
"name": "Yagiz Nizipli",
"githubUsername": "anonrig",
"url": "https://github.com/anonrig"
}
],
"main": "",
"types": "index.d.ts",
"typesVersions": {
"<=5.6": {
"*": [
"ts5.6/*"
]
},
"<=5.7": {
"*": [
"ts5.7/*"
]
}
},
"repository": {
"type": "git",
"url": "https://github.com/DefinitelyTyped/DefinitelyTyped.git",
"directory": "types/node"
},
"scripts": {},
"dependencies": {
"undici-types": "~7.18.0"
},
"peerDependencies": {},
"typesPublisherContentHash": "4b6968335abe1dc64bd6086fd546d6e9c50f986c37d49de8073f4ed1c900057c",
"typeScriptVersion": "5.2"
}

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/**
* The `node:path` module provides utilities for working with file and directory
* paths. It can be accessed using:
*
* ```js
* import path from 'node:path';
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/path.js)
*/
declare module "node:path" {
namespace path {
/**
* A parsed path object generated by path.parse() or consumed by path.format().
*/
interface ParsedPath {
/**
* The root of the path such as '/' or 'c:\'
*/
root: string;
/**
* The full directory path such as '/home/user/dir' or 'c:\path\dir'
*/
dir: string;
/**
* The file name including extension (if any) such as 'index.html'
*/
base: string;
/**
* The file extension (if any) such as '.html'
*/
ext: string;
/**
* The file name without extension (if any) such as 'index'
*/
name: string;
}
interface FormatInputPathObject {
/**
* The root of the path such as '/' or 'c:\'
*/
root?: string | undefined;
/**
* The full directory path such as '/home/user/dir' or 'c:\path\dir'
*/
dir?: string | undefined;
/**
* The file name including extension (if any) such as 'index.html'
*/
base?: string | undefined;
/**
* The file extension (if any) such as '.html'
*/
ext?: string | undefined;
/**
* The file name without extension (if any) such as 'index'
*/
name?: string | undefined;
}
/**
* Normalize a string path, reducing '..' and '.' parts.
* When multiple slashes are found, they're replaced by a single one; when the path contains a trailing slash, it is preserved. On Windows backslashes are used. If the path is a zero-length string, '.' is returned, representing the current working directory.
*
* @param path string path to normalize.
* @throws {TypeError} if `path` is not a string.
*/
function normalize(path: string): string;
/**
* Join all arguments together and normalize the resulting path.
*
* @param paths paths to join.
* @throws {TypeError} if any of the path segments is not a string.
*/
function join(...paths: string[]): string;
/**
* The right-most parameter is considered {to}. Other parameters are considered an array of {from}.
*
* Starting from leftmost {from} parameter, resolves {to} to an absolute path.
*
* If {to} isn't already absolute, {from} arguments are prepended in right to left order,
* until an absolute path is found. If after using all {from} paths still no absolute path is found,
* the current working directory is used as well. The resulting path is normalized,
* and trailing slashes are removed unless the path gets resolved to the root directory.
*
* @param paths A sequence of paths or path segments.
* @throws {TypeError} if any of the arguments is not a string.
*/
function resolve(...paths: string[]): string;
/**
* The `path.matchesGlob()` method determines if `path` matches the `pattern`.
* @param path The path to glob-match against.
* @param pattern The glob to check the path against.
* @returns Whether or not the `path` matched the `pattern`.
* @throws {TypeError} if `path` or `pattern` are not strings.
* @since v22.5.0
*/
function matchesGlob(path: string, pattern: string): boolean;
/**
* Determines whether {path} is an absolute path. An absolute path will always resolve to the same location, regardless of the working directory.
*
* If the given {path} is a zero-length string, `false` will be returned.
*
* @param path path to test.
* @throws {TypeError} if `path` is not a string.
*/
function isAbsolute(path: string): boolean;
/**
* Solve the relative path from {from} to {to} based on the current working directory.
* At times we have two absolute paths, and we need to derive the relative path from one to the other. This is actually the reverse transform of path.resolve.
*
* @throws {TypeError} if either `from` or `to` is not a string.
*/
function relative(from: string, to: string): string;
/**
* Return the directory name of a path. Similar to the Unix dirname command.
*
* @param path the path to evaluate.
* @throws {TypeError} if `path` is not a string.
*/
function dirname(path: string): string;
/**
* Return the last portion of a path. Similar to the Unix basename command.
* Often used to extract the file name from a fully qualified path.
*
* @param path the path to evaluate.
* @param suffix optionally, an extension to remove from the result.
* @throws {TypeError} if `path` is not a string or if `ext` is given and is not a string.
*/
function basename(path: string, suffix?: string): string;
/**
* Return the extension of the path, from the last '.' to end of string in the last portion of the path.
* If there is no '.' in the last portion of the path or the first character of it is '.', then it returns an empty string.
*
* @param path the path to evaluate.
* @throws {TypeError} if `path` is not a string.
*/
function extname(path: string): string;
/**
* The platform-specific file separator. '\\' or '/'.
*/
const sep: "\\" | "/";
/**
* The platform-specific file delimiter. ';' or ':'.
*/
const delimiter: ";" | ":";
/**
* Returns an object from a path string - the opposite of format().
*
* @param path path to evaluate.
* @throws {TypeError} if `path` is not a string.
*/
function parse(path: string): ParsedPath;
/**
* Returns a path string from an object - the opposite of parse().
*
* @param pathObject path to evaluate.
*/
function format(pathObject: FormatInputPathObject): string;
/**
* On Windows systems only, returns an equivalent namespace-prefixed path for the given path.
* If path is not a string, path will be returned without modifications.
* This method is meaningful only on Windows system.
* On POSIX systems, the method is non-operational and always returns path without modifications.
*/
function toNamespacedPath(path: string): string;
}
namespace path {
export {
/**
* The `path.posix` property provides access to POSIX specific implementations of the `path` methods.
*
* The API is accessible via `require('node:path').posix` or `require('node:path/posix')`.
*/
path as posix,
/**
* The `path.win32` property provides access to Windows-specific implementations of the `path` methods.
*
* The API is accessible via `require('node:path').win32` or `require('node:path/win32')`.
*/
path as win32,
};
}
export = path;
}
declare module "path" {
import path = require("node:path");
export = path;
}

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declare module "node:path/posix" {
import path = require("node:path");
export = path.posix;
}
declare module "path/posix" {
import path = require("path");
export = path.posix;
}

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declare module "node:path/win32" {
import path = require("node:path");
export = path.win32;
}
declare module "path/win32" {
import path = require("path");
export = path.win32;
}

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/**
* This module provides an implementation of a subset of the W3C [Web Performance APIs](https://w3c.github.io/perf-timing-primer/) as well as additional APIs for
* Node.js-specific performance measurements.
*
* Node.js supports the following [Web Performance APIs](https://w3c.github.io/perf-timing-primer/):
*
* * [High Resolution Time](https://www.w3.org/TR/hr-time-2)
* * [Performance Timeline](https://w3c.github.io/performance-timeline/)
* * [User Timing](https://www.w3.org/TR/user-timing/)
* * [Resource Timing](https://www.w3.org/TR/resource-timing-2/)
*
* ```js
* import { PerformanceObserver, performance } from 'node:perf_hooks';
*
* const obs = new PerformanceObserver((items) => {
* console.log(items.getEntries()[0].duration);
* performance.clearMarks();
* });
* obs.observe({ type: 'measure' });
* performance.measure('Start to Now');
*
* performance.mark('A');
* doSomeLongRunningProcess(() => {
* performance.measure('A to Now', 'A');
*
* performance.mark('B');
* performance.measure('A to B', 'A', 'B');
* });
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/perf_hooks.js)
*/
declare module "node:perf_hooks" {
import { InternalEventTargetEventProperties } from "node:events";
// #region web types
type EntryType =
| "dns" // Node.js only
| "function" // Node.js only
| "gc" // Node.js only
| "http2" // Node.js only
| "http" // Node.js only
| "mark" // available on the Web
| "measure" // available on the Web
| "net" // Node.js only
| "node" // Node.js only
| "resource"; // available on the Web
interface ConnectionTimingInfo {
domainLookupStartTime: number;
domainLookupEndTime: number;
connectionStartTime: number;
connectionEndTime: number;
secureConnectionStartTime: number;
ALPNNegotiatedProtocol: string;
}
interface FetchTimingInfo {
startTime: number;
redirectStartTime: number;
redirectEndTime: number;
postRedirectStartTime: number;
finalServiceWorkerStartTime: number;
finalNetworkRequestStartTime: number;
finalNetworkResponseStartTime: number;
endTime: number;
finalConnectionTimingInfo: ConnectionTimingInfo | null;
encodedBodySize: number;
decodedBodySize: number;
}
type PerformanceEntryList = PerformanceEntry[];
interface PerformanceMarkOptions {
detail?: any;
startTime?: number;
}
interface PerformanceMeasureOptions {
detail?: any;
duration?: number;
end?: string | number;
start?: string | number;
}
interface PerformanceObserverCallback {
(entries: PerformanceObserverEntryList, observer: PerformanceObserver): void;
}
interface PerformanceObserverInit {
buffered?: boolean;
entryTypes?: EntryType[];
type?: EntryType;
}
// TODO: remove in next major
/** @deprecated Use `TimerifyOptions` instead. */
interface PerformanceTimerifyOptions extends TimerifyOptions {}
interface PerformanceEventMap {
"resourcetimingbufferfull": Event;
}
interface Performance extends EventTarget, InternalEventTargetEventProperties<PerformanceEventMap> {
readonly nodeTiming: PerformanceNodeTiming;
readonly timeOrigin: number;
clearMarks(markName?: string): void;
clearMeasures(measureName?: string): void;
clearResourceTimings(resourceTimingName?: string): void;
getEntries(): PerformanceEntryList;
getEntriesByName(name: string, type?: EntryType): PerformanceEntryList;
getEntriesByType(type: EntryType): PerformanceEntryList;
mark(markName: string, markOptions?: PerformanceMarkOptions): PerformanceMark;
markResourceTiming(
timingInfo: FetchTimingInfo,
requestedUrl: string,
initiatorType: string,
global: unknown,
cacheMode: string,
bodyInfo: unknown,
responseStatus: number,
deliveryType?: string,
): PerformanceResourceTiming;
measure(measureName: string, startMark?: string, endMark?: string): PerformanceMeasure;
measure(measureName: string, options: PerformanceMeasureOptions, endMark?: string): PerformanceMeasure;
now(): number;
setResourceTimingBufferSize(maxSize: number): void;
toJSON(): any;
addEventListener<K extends keyof PerformanceEventMap>(
type: K,
listener: (ev: PerformanceEventMap[K]) => void,
options?: AddEventListenerOptions | boolean,
): void;
addEventListener(
type: string,
listener: EventListener | EventListenerObject,
options?: AddEventListenerOptions | boolean,
): void;
removeEventListener<K extends keyof PerformanceEventMap>(
type: K,
listener: (ev: PerformanceEventMap[K]) => void,
options?: EventListenerOptions | boolean,
): void;
removeEventListener(
type: string,
listener: EventListener | EventListenerObject,
options?: EventListenerOptions | boolean,
): void;
/**
* This is an alias of `perf_hooks.eventLoopUtilization()`.
*
* _This property is an extension by Node.js. It is not available in Web browsers._
* @since v14.10.0, v12.19.0
* @param utilization1 The result of a previous call to
* `eventLoopUtilization()`.
* @param utilization2 The result of a previous call to
* `eventLoopUtilization()` prior to `utilization1`.
*/
eventLoopUtilization(
utilization1?: EventLoopUtilization,
utilization2?: EventLoopUtilization,
): EventLoopUtilization;
/**
* This is an alias of `perf_hooks.timerify()`.
*
* _This property is an extension by Node.js. It is not available in Web browsers._
* @since v8.5.0
*/
timerify<T extends (...args: any[]) => any>(fn: T, options?: TimerifyOptions): T;
}
var Performance: {
prototype: Performance;
new(): Performance;
};
interface PerformanceEntry {
readonly duration: number;
readonly entryType: EntryType;
readonly name: string;
readonly startTime: number;
toJSON(): any;
}
var PerformanceEntry: {
prototype: PerformanceEntry;
new(): PerformanceEntry;
};
interface PerformanceMark extends PerformanceEntry {
readonly detail: any;
readonly entryType: "mark";
}
var PerformanceMark: {
prototype: PerformanceMark;
new(markName: string, markOptions?: PerformanceMarkOptions): PerformanceMark;
};
interface PerformanceMeasure extends PerformanceEntry {
readonly detail: any;
readonly entryType: "measure";
}
var PerformanceMeasure: {
prototype: PerformanceMeasure;
new(): PerformanceMeasure;
};
interface PerformanceObserver {
disconnect(): void;
observe(options: PerformanceObserverInit): void;
takeRecords(): PerformanceEntryList;
}
var PerformanceObserver: {
prototype: PerformanceObserver;
new(callback: PerformanceObserverCallback): PerformanceObserver;
readonly supportedEntryTypes: readonly EntryType[];
};
interface PerformanceObserverEntryList {
getEntries(): PerformanceEntryList;
getEntriesByName(name: string, type?: EntryType): PerformanceEntryList;
getEntriesByType(type: EntryType): PerformanceEntryList;
}
var PerformanceObserverEntryList: {
prototype: PerformanceObserverEntryList;
new(): PerformanceObserverEntryList;
};
interface PerformanceResourceTiming extends PerformanceEntry {
readonly connectEnd: number;
readonly connectStart: number;
readonly decodedBodySize: number;
readonly domainLookupEnd: number;
readonly domainLookupStart: number;
readonly encodedBodySize: number;
readonly entryType: "resource";
readonly fetchStart: number;
readonly initiatorType: string;
readonly nextHopProtocol: string;
readonly redirectEnd: number;
readonly redirectStart: number;
readonly requestStart: number;
readonly responseEnd: number;
readonly responseStart: number;
readonly responseStatus: number;
readonly secureConnectionStart: number;
readonly transferSize: number;
readonly workerStart: number;
toJSON(): any;
}
var PerformanceResourceTiming: {
prototype: PerformanceResourceTiming;
new(): PerformanceResourceTiming;
};
var performance: Performance;
// #endregion
/**
* _This class is an extension by Node.js. It is not available in Web browsers._
*
* Provides detailed Node.js timing data.
*
* The constructor of this class is not exposed to users directly.
* @since v19.0.0
*/
class PerformanceNodeEntry extends PerformanceEntry {
/**
* Additional detail specific to the `entryType`.
* @since v16.0.0
*/
readonly detail: any;
readonly entryType: "dns" | "function" | "gc" | "http2" | "http" | "net" | "node";
}
interface UVMetrics {
/**
* Number of event loop iterations.
*/
readonly loopCount: number;
/**
* Number of events that have been processed by the event handler.
*/
readonly events: number;
/**
* Number of events that were waiting to be processed when the event provider was called.
*/
readonly eventsWaiting: number;
}
/**
* _This property is an extension by Node.js. It is not available in Web browsers._
*
* Provides timing details for Node.js itself. The constructor of this class
* is not exposed to users.
* @since v8.5.0
*/
interface PerformanceNodeTiming extends PerformanceEntry {
/**
* The high resolution millisecond timestamp at which the Node.js process
* completed bootstrapping. If bootstrapping has not yet finished, the property
* has the value of -1.
* @since v8.5.0
*/
readonly bootstrapComplete: number;
readonly entryType: "node";
/**
* The high resolution millisecond timestamp at which the Node.js environment was
* initialized.
* @since v8.5.0
*/
readonly environment: number;
/**
* The high resolution millisecond timestamp of the amount of time the event loop
* has been idle within the event loop's event provider (e.g. `epoll_wait`). This
* does not take CPU usage into consideration. If the event loop has not yet
* started (e.g., in the first tick of the main script), the property has the
* value of 0.
* @since v14.10.0, v12.19.0
*/
readonly idleTime: number;
/**
* The high resolution millisecond timestamp at which the Node.js event loop
* exited. If the event loop has not yet exited, the property has the value of -1\.
* It can only have a value of not -1 in a handler of the `'exit'` event.
* @since v8.5.0
*/
readonly loopExit: number;
/**
* The high resolution millisecond timestamp at which the Node.js event loop
* started. If the event loop has not yet started (e.g., in the first tick of the
* main script), the property has the value of -1.
* @since v8.5.0
*/
readonly loopStart: number;
/**
* The high resolution millisecond timestamp at which the Node.js process was initialized.
* @since v8.5.0
*/
readonly nodeStart: number;
/**
* This is a wrapper to the `uv_metrics_info` function.
* It returns the current set of event loop metrics.
*
* It is recommended to use this property inside a function whose execution was
* scheduled using `setImmediate` to avoid collecting metrics before finishing all
* operations scheduled during the current loop iteration.
* @since v22.8.0, v20.18.0
*/
readonly uvMetricsInfo: UVMetrics;
/**
* The high resolution millisecond timestamp at which the V8 platform was
* initialized.
* @since v8.5.0
*/
readonly v8Start: number;
}
namespace constants {
const NODE_PERFORMANCE_GC_MAJOR: number;
const NODE_PERFORMANCE_GC_MINOR: number;
const NODE_PERFORMANCE_GC_INCREMENTAL: number;
const NODE_PERFORMANCE_GC_WEAKCB: number;
const NODE_PERFORMANCE_GC_FLAGS_NO: number;
const NODE_PERFORMANCE_GC_FLAGS_CONSTRUCT_RETAINED: number;
const NODE_PERFORMANCE_GC_FLAGS_FORCED: number;
const NODE_PERFORMANCE_GC_FLAGS_SYNCHRONOUS_PHANTOM_PROCESSING: number;
const NODE_PERFORMANCE_GC_FLAGS_ALL_AVAILABLE_GARBAGE: number;
const NODE_PERFORMANCE_GC_FLAGS_ALL_EXTERNAL_MEMORY: number;
const NODE_PERFORMANCE_GC_FLAGS_SCHEDULE_IDLE: number;
}
interface EventLoopMonitorOptions {
/**
* The sampling rate in milliseconds.
* Must be greater than zero.
* @default 10
*/
resolution?: number | undefined;
}
interface Histogram {
/**
* The number of samples recorded by the histogram.
* @since v17.4.0, v16.14.0
*/
readonly count: number;
/**
* The number of samples recorded by the histogram.
* v17.4.0, v16.14.0
*/
readonly countBigInt: bigint;
/**
* The number of times the event loop delay exceeded the maximum 1 hour event
* loop delay threshold.
* @since v11.10.0
*/
readonly exceeds: number;
/**
* The number of times the event loop delay exceeded the maximum 1 hour event loop delay threshold.
* @since v17.4.0, v16.14.0
*/
readonly exceedsBigInt: bigint;
/**
* The maximum recorded event loop delay.
* @since v11.10.0
*/
readonly max: number;
/**
* The maximum recorded event loop delay.
* v17.4.0, v16.14.0
*/
readonly maxBigInt: number;
/**
* The mean of the recorded event loop delays.
* @since v11.10.0
*/
readonly mean: number;
/**
* The minimum recorded event loop delay.
* @since v11.10.0
*/
readonly min: number;
/**
* The minimum recorded event loop delay.
* v17.4.0, v16.14.0
*/
readonly minBigInt: bigint;
/**
* Returns the value at the given percentile.
* @since v11.10.0
* @param percentile A percentile value in the range (0, 100].
*/
percentile(percentile: number): number;
/**
* Returns the value at the given percentile.
* @since v17.4.0, v16.14.0
* @param percentile A percentile value in the range (0, 100].
*/
percentileBigInt(percentile: number): bigint;
/**
* Returns a `Map` object detailing the accumulated percentile distribution.
* @since v11.10.0
*/
readonly percentiles: Map<number, number>;
/**
* Returns a `Map` object detailing the accumulated percentile distribution.
* @since v17.4.0, v16.14.0
*/
readonly percentilesBigInt: Map<bigint, bigint>;
/**
* Resets the collected histogram data.
* @since v11.10.0
*/
reset(): void;
/**
* The standard deviation of the recorded event loop delays.
* @since v11.10.0
*/
readonly stddev: number;
}
interface IntervalHistogram extends Histogram {
/**
* Enables the update interval timer. Returns `true` if the timer was
* started, `false` if it was already started.
* @since v11.10.0
*/
enable(): boolean;
/**
* Disables the update interval timer. Returns `true` if the timer was
* stopped, `false` if it was already stopped.
* @since v11.10.0
*/
disable(): boolean;
/**
* Disables the update interval timer when the histogram is disposed.
*
* ```js
* const { monitorEventLoopDelay } = require('node:perf_hooks');
* {
* using hist = monitorEventLoopDelay({ resolution: 20 });
* hist.enable();
* // The histogram will be disabled when the block is exited.
* }
* ```
* @since v24.2.0
*/
[Symbol.dispose](): void;
}
interface RecordableHistogram extends Histogram {
/**
* @since v15.9.0, v14.18.0
* @param val The amount to record in the histogram.
*/
record(val: number | bigint): void;
/**
* Calculates the amount of time (in nanoseconds) that has passed since the
* previous call to `recordDelta()` and records that amount in the histogram.
* @since v15.9.0, v14.18.0
*/
recordDelta(): void;
/**
* Adds the values from `other` to this histogram.
* @since v17.4.0, v16.14.0
*/
add(other: RecordableHistogram): void;
}
interface EventLoopUtilization {
idle: number;
active: number;
utilization: number;
}
/**
* The `eventLoopUtilization()` function returns an object that contains the
* cumulative duration of time the event loop has been both idle and active as a
* high resolution milliseconds timer. The `utilization` value is the calculated
* Event Loop Utilization (ELU).
*
* If bootstrapping has not yet finished on the main thread the properties have
* the value of `0`. The ELU is immediately available on [Worker threads](https://nodejs.org/docs/latest-v25.x/api/worker_threads.html#worker-threads) since
* bootstrap happens within the event loop.
*
* Both `utilization1` and `utilization2` are optional parameters.
*
* If `utilization1` is passed, then the delta between the current call's `active`
* and `idle` times, as well as the corresponding `utilization` value are
* calculated and returned (similar to `process.hrtime()`).
*
* If `utilization1` and `utilization2` are both passed, then the delta is
* calculated between the two arguments. This is a convenience option because,
* unlike `process.hrtime()`, calculating the ELU is more complex than a
* single subtraction.
*
* ELU is similar to CPU utilization, except that it only measures event loop
* statistics and not CPU usage. It represents the percentage of time the event
* loop has spent outside the event loop's event provider (e.g. `epoll_wait`).
* No other CPU idle time is taken into consideration. The following is an example
* of how a mostly idle process will have a high ELU.
*
* ```js
* import { eventLoopUtilization } from 'node:perf_hooks';
* import { spawnSync } from 'node:child_process';
*
* setImmediate(() => {
* const elu = eventLoopUtilization();
* spawnSync('sleep', ['5']);
* console.log(eventLoopUtilization(elu).utilization);
* });
* ```
*
* Although the CPU is mostly idle while running this script, the value of
* `utilization` is `1`. This is because the call to
* `child_process.spawnSync()` blocks the event loop from proceeding.
*
* Passing in a user-defined object instead of the result of a previous call to
* `eventLoopUtilization()` will lead to undefined behavior. The return values
* are not guaranteed to reflect any correct state of the event loop.
* @since v25.2.0
* @param utilization1 The result of a previous call to
* `eventLoopUtilization()`.
* @param utilization2 The result of a previous call to
* `eventLoopUtilization()` prior to `utilization1`.
*/
function eventLoopUtilization(
utilization1?: EventLoopUtilization,
utilization2?: EventLoopUtilization,
): EventLoopUtilization;
/**
* _This property is an extension by Node.js. It is not available in Web browsers._
*
* Creates an `IntervalHistogram` object that samples and reports the event loop
* delay over time. The delays will be reported in nanoseconds.
*
* Using a timer to detect approximate event loop delay works because the
* execution of timers is tied specifically to the lifecycle of the libuv
* event loop. That is, a delay in the loop will cause a delay in the execution
* of the timer, and those delays are specifically what this API is intended to
* detect.
*
* ```js
* import { monitorEventLoopDelay } from 'node:perf_hooks';
* const h = monitorEventLoopDelay({ resolution: 20 });
* h.enable();
* // Do something.
* h.disable();
* console.log(h.min);
* console.log(h.max);
* console.log(h.mean);
* console.log(h.stddev);
* console.log(h.percentiles);
* console.log(h.percentile(50));
* console.log(h.percentile(99));
* ```
* @since v11.10.0
*/
function monitorEventLoopDelay(options?: EventLoopMonitorOptions): IntervalHistogram;
interface TimerifyOptions {
/**
* A histogram object created using
* `perf_hooks.createHistogram()` that will record runtime durations in
* nanoseconds.
*/
histogram?: RecordableHistogram | undefined;
}
/**
* _This property is an extension by Node.js. It is not available in Web browsers._
*
* Wraps a function within a new function that measures the running time of the
* wrapped function. A `PerformanceObserver` must be subscribed to the `'function'`
* event type in order for the timing details to be accessed.
*
* ```js
* import { timerify, performance, PerformanceObserver } from 'node:perf_hooks';
*
* function someFunction() {
* console.log('hello world');
* }
*
* const wrapped = timerify(someFunction);
*
* const obs = new PerformanceObserver((list) => {
* console.log(list.getEntries()[0].duration);
*
* performance.clearMarks();
* performance.clearMeasures();
* obs.disconnect();
* });
* obs.observe({ entryTypes: ['function'] });
*
* // A performance timeline entry will be created
* wrapped();
* ```
*
* If the wrapped function returns a promise, a finally handler will be attached
* to the promise and the duration will be reported once the finally handler is
* invoked.
* @since v25.2.0
*/
function timerify<T extends (...args: any[]) => any>(fn: T, options?: TimerifyOptions): T;
interface CreateHistogramOptions {
/**
* The minimum recordable value. Must be an integer value greater than 0.
* @default 1
*/
lowest?: number | bigint | undefined;
/**
* The maximum recordable value. Must be an integer value greater than min.
* @default Number.MAX_SAFE_INTEGER
*/
highest?: number | bigint | undefined;
/**
* The number of accuracy digits. Must be a number between 1 and 5.
* @default 3
*/
figures?: number | undefined;
}
/**
* Returns a `RecordableHistogram`.
* @since v15.9.0, v14.18.0
*/
function createHistogram(options?: CreateHistogramOptions): RecordableHistogram;
// TODO: remove these in a future major
/** @deprecated Use the canonical `PerformanceMarkOptions` instead. */
interface MarkOptions extends PerformanceMarkOptions {}
/** @deprecated Use the canonical `PerformanceMeasureOptions` instead. */
interface MeasureOptions extends PerformanceMeasureOptions {}
}
declare module "perf_hooks" {
export * from "node:perf_hooks";
}

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/**
* **The version of the punycode module bundled in Node.js is being deprecated. **In a future major version of Node.js this module will be removed. Users
* currently depending on the `punycode` module should switch to using the
* userland-provided [Punycode.js](https://github.com/bestiejs/punycode.js) module instead. For punycode-based URL
* encoding, see `url.domainToASCII` or, more generally, the `WHATWG URL API`.
*
* The `punycode` module is a bundled version of the [Punycode.js](https://github.com/bestiejs/punycode.js) module. It
* can be accessed using:
*
* ```js
* import punycode from 'node:punycode';
* ```
*
* [Punycode](https://tools.ietf.org/html/rfc3492) is a character encoding scheme defined by RFC 3492 that is
* primarily intended for use in Internationalized Domain Names. Because host
* names in URLs are limited to ASCII characters only, Domain Names that contain
* non-ASCII characters must be converted into ASCII using the Punycode scheme.
* For instance, the Japanese character that translates into the English word, `'example'` is `'例'`. The Internationalized Domain Name, `'例.com'` (equivalent
* to `'example.com'`) is represented by Punycode as the ASCII string `'xn--fsq.com'`.
*
* The `punycode` module provides a simple implementation of the Punycode standard.
*
* The `punycode` module is a third-party dependency used by Node.js and
* made available to developers as a convenience. Fixes or other modifications to
* the module must be directed to the [Punycode.js](https://github.com/bestiejs/punycode.js) project.
* @deprecated
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/punycode.js)
*/
declare module "node:punycode" {
/**
* The `punycode.decode()` method converts a [Punycode](https://tools.ietf.org/html/rfc3492) string of ASCII-only
* characters to the equivalent string of Unicode codepoints.
*
* ```js
* punycode.decode('maana-pta'); // 'mañana'
* punycode.decode('--dqo34k'); // '☃-⌘'
* ```
* @since v0.5.1
*/
function decode(string: string): string;
/**
* The `punycode.encode()` method converts a string of Unicode codepoints to a [Punycode](https://tools.ietf.org/html/rfc3492) string of ASCII-only characters.
*
* ```js
* punycode.encode('mañana'); // 'maana-pta'
* punycode.encode('☃-⌘'); // '--dqo34k'
* ```
* @since v0.5.1
*/
function encode(string: string): string;
/**
* The `punycode.toUnicode()` method converts a string representing a domain name
* containing [Punycode](https://tools.ietf.org/html/rfc3492) encoded characters into Unicode. Only the [Punycode](https://tools.ietf.org/html/rfc3492) encoded parts of the domain name are be
* converted.
*
* ```js
* // decode domain names
* punycode.toUnicode('xn--maana-pta.com'); // 'mañana.com'
* punycode.toUnicode('xn----dqo34k.com'); // '☃-⌘.com'
* punycode.toUnicode('example.com'); // 'example.com'
* ```
* @since v0.6.1
*/
function toUnicode(domain: string): string;
/**
* The `punycode.toASCII()` method converts a Unicode string representing an
* Internationalized Domain Name to [Punycode](https://tools.ietf.org/html/rfc3492). Only the non-ASCII parts of the
* domain name will be converted. Calling `punycode.toASCII()` on a string that
* already only contains ASCII characters will have no effect.
*
* ```js
* // encode domain names
* punycode.toASCII('mañana.com'); // 'xn--maana-pta.com'
* punycode.toASCII('☃-⌘.com'); // 'xn----dqo34k.com'
* punycode.toASCII('example.com'); // 'example.com'
* ```
* @since v0.6.1
*/
function toASCII(domain: string): string;
/**
* @deprecated since v7.0.0
* The version of the punycode module bundled in Node.js is being deprecated.
* In a future major version of Node.js this module will be removed.
* Users currently depending on the punycode module should switch to using
* the userland-provided Punycode.js module instead.
*/
const ucs2: ucs2;
interface ucs2 {
/**
* @deprecated since v7.0.0
* The version of the punycode module bundled in Node.js is being deprecated.
* In a future major version of Node.js this module will be removed.
* Users currently depending on the punycode module should switch to using
* the userland-provided Punycode.js module instead.
*/
decode(string: string): number[];
/**
* @deprecated since v7.0.0
* The version of the punycode module bundled in Node.js is being deprecated.
* In a future major version of Node.js this module will be removed.
* Users currently depending on the punycode module should switch to using
* the userland-provided Punycode.js module instead.
*/
encode(codePoints: readonly number[]): string;
}
/**
* @deprecated since v7.0.0
* The version of the punycode module bundled in Node.js is being deprecated.
* In a future major version of Node.js this module will be removed.
* Users currently depending on the punycode module should switch to using
* the userland-provided Punycode.js module instead.
*/
const version: string;
}
declare module "punycode" {
export * from "node:punycode";
}

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/**
* The `node:querystring` module provides utilities for parsing and formatting URL
* query strings. It can be accessed using:
*
* ```js
* import querystring from 'node:querystring';
* ```
*
* `querystring` is more performant than `URLSearchParams` but is not a
* standardized API. Use `URLSearchParams` when performance is not critical or
* when compatibility with browser code is desirable.
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/querystring.js)
*/
declare module "node:querystring" {
interface StringifyOptions {
/**
* The function to use when converting URL-unsafe characters to percent-encoding in the query string.
* @default `querystring.escape()`
*/
encodeURIComponent?: ((str: string) => string) | undefined;
}
interface ParseOptions {
/**
* Specifies the maximum number of keys to parse. Specify `0` to remove key counting limitations.
* @default 1000
*/
maxKeys?: number | undefined;
/**
* The function to use when decoding percent-encoded characters in the query string.
* @default `querystring.unescape()`
*/
decodeURIComponent?: ((str: string) => string) | undefined;
}
interface ParsedUrlQuery extends NodeJS.Dict<string | string[]> {}
interface ParsedUrlQueryInput extends
NodeJS.Dict<
| string
| number
| boolean
| bigint
| ReadonlyArray<string | number | boolean | bigint>
| null
>
{}
/**
* The `querystring.stringify()` method produces a URL query string from a
* given `obj` by iterating through the object's "own properties".
*
* It serializes the following types of values passed in `obj`: [string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type) |
* [number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type) |
* [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt) |
* [boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type) |
* [string\[\]](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type) |
* [number\[\]](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type) |
* [bigint\[\]](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt) |
* [boolean\[\]](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type) The numeric values must be finite. Any other input values will be coerced to
* empty strings.
*
* ```js
* querystring.stringify({ foo: 'bar', baz: ['qux', 'quux'], corge: '' });
* // Returns 'foo=bar&#x26;baz=qux&#x26;baz=quux&#x26;corge='
*
* querystring.stringify({ foo: 'bar', baz: 'qux' }, ';', ':');
* // Returns 'foo:bar;baz:qux'
* ```
*
* By default, characters requiring percent-encoding within the query string will
* be encoded as UTF-8\. If an alternative encoding is required, then an alternative `encodeURIComponent` option will need to be specified:
*
* ```js
* // Assuming gbkEncodeURIComponent function already exists,
*
* querystring.stringify({ w: '中文', foo: 'bar' }, null, null,
* { encodeURIComponent: gbkEncodeURIComponent });
* ```
* @since v0.1.25
* @param obj The object to serialize into a URL query string
* @param [sep='&'] The substring used to delimit key and value pairs in the query string.
* @param [eq='='] . The substring used to delimit keys and values in the query string.
*/
function stringify(obj?: ParsedUrlQueryInput, sep?: string, eq?: string, options?: StringifyOptions): string;
/**
* The `querystring.parse()` method parses a URL query string (`str`) into a
* collection of key and value pairs.
*
* For example, the query string `'foo=bar&#x26;abc=xyz&#x26;abc=123'` is parsed into:
*
* ```json
* {
* "foo": "bar",
* "abc": ["xyz", "123"]
* }
* ```
*
* The object returned by the `querystring.parse()` method _does not_ prototypically inherit from the JavaScript `Object`. This means that typical `Object` methods such as `obj.toString()`,
* `obj.hasOwnProperty()`, and others
* are not defined and _will not work_.
*
* By default, percent-encoded characters within the query string will be assumed
* to use UTF-8 encoding. If an alternative character encoding is used, then an
* alternative `decodeURIComponent` option will need to be specified:
*
* ```js
* // Assuming gbkDecodeURIComponent function already exists...
*
* querystring.parse('w=%D6%D0%CE%C4&#x26;foo=bar', null, null,
* { decodeURIComponent: gbkDecodeURIComponent });
* ```
* @since v0.1.25
* @param str The URL query string to parse
* @param [sep='&'] The substring used to delimit key and value pairs in the query string.
* @param [eq='='] The substring used to delimit keys and values in the query string.
*/
function parse(str: string, sep?: string, eq?: string, options?: ParseOptions): ParsedUrlQuery;
/**
* The querystring.encode() function is an alias for querystring.stringify().
*/
const encode: typeof stringify;
/**
* The querystring.decode() function is an alias for querystring.parse().
*/
const decode: typeof parse;
/**
* The `querystring.escape()` method performs URL percent-encoding on the given `str` in a manner that is optimized for the specific requirements of URL
* query strings.
*
* The `querystring.escape()` method is used by `querystring.stringify()` and is
* generally not expected to be used directly. It is exported primarily to allow
* application code to provide a replacement percent-encoding implementation if
* necessary by assigning `querystring.escape` to an alternative function.
* @since v0.1.25
*/
function escape(str: string): string;
/**
* The `querystring.unescape()` method performs decoding of URL percent-encoded
* characters on the given `str`.
*
* The `querystring.unescape()` method is used by `querystring.parse()` and is
* generally not expected to be used directly. It is exported primarily to allow
* application code to provide a replacement decoding implementation if
* necessary by assigning `querystring.unescape` to an alternative function.
*
* By default, the `querystring.unescape()` method will attempt to use the
* JavaScript built-in `decodeURIComponent()` method to decode. If that fails,
* a safer equivalent that does not throw on malformed URLs will be used.
* @since v0.1.25
*/
function unescape(str: string): string;
}
declare module "querystring" {
export * from "node:querystring";
}

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/**
* The 'node:quic' module provides an implementation of the QUIC protocol.
* To access it, start Node.js with the `--experimental-quic` option and:
*
* ```js
* import quic from 'node:quic';
* ```
*
* The module is only available under the `node:` scheme.
* @since v23.8.0
* @experimental
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/quic.js)
*/
declare module "node:quic" {
import { KeyObject, webcrypto } from "node:crypto";
import { SocketAddress } from "node:net";
import { ReadableStream } from "node:stream/web";
/**
* @since v23.8.0
*/
type OnSessionCallback = (this: QuicEndpoint, session: QuicSession) => void;
/**
* @since v23.8.0
*/
type OnStreamCallback = (this: QuicSession, stream: QuicStream) => void;
/**
* @since v23.8.0
*/
type OnDatagramCallback = (this: QuicSession, datagram: Uint8Array, early: boolean) => void;
/**
* @since v23.8.0
*/
type OnDatagramStatusCallback = (this: QuicSession, id: bigint, status: "lost" | "acknowledged") => void;
/**
* @since v23.8.0
*/
type OnPathValidationCallback = (
this: QuicSession,
result: "success" | "failure" | "aborted",
newLocalAddress: SocketAddress,
newRemoteAddress: SocketAddress,
oldLocalAddress: SocketAddress,
oldRemoteAddress: SocketAddress,
preferredAddress: boolean,
) => void;
/**
* @since v23.8.0
*/
type OnSessionTicketCallback = (this: QuicSession, ticket: object) => void;
/**
* @since v23.8.0
*/
type OnVersionNegotiationCallback = (
this: QuicSession,
version: number,
requestedVersions: number[],
supportedVersions: number[],
) => void;
/**
* @since v23.8.0
*/
type OnHandshakeCallback = (
this: QuicSession,
sni: string,
alpn: string,
cipher: string,
cipherVersion: string,
validationErrorReason: string,
validationErrorCode: number,
earlyDataAccepted: boolean,
) => void;
/**
* @since v23.8.0
*/
type OnBlockedCallback = (this: QuicStream) => void;
/**
* @since v23.8.0
*/
type OnStreamErrorCallback = (this: QuicStream, error: any) => void;
/**
* @since v23.8.0
*/
interface TransportParams {
/**
* The preferred IPv4 address to advertise.
* @since v23.8.0
*/
preferredAddressIpv4?: SocketAddress | undefined;
/**
* The preferred IPv6 address to advertise.
* @since v23.8.0
*/
preferredAddressIpv6?: SocketAddress | undefined;
/**
* @since v23.8.0
*/
initialMaxStreamDataBidiLocal?: bigint | number | undefined;
/**
* @since v23.8.0
*/
initialMaxStreamDataBidiRemote?: bigint | number | undefined;
/**
* @since v23.8.0
*/
initialMaxStreamDataUni?: bigint | number | undefined;
/**
* @since v23.8.0
*/
initialMaxData?: bigint | number | undefined;
/**
* @since v23.8.0
*/
initialMaxStreamsBidi?: bigint | number | undefined;
/**
* @since v23.8.0
*/
initialMaxStreamsUni?: bigint | number | undefined;
/**
* @since v23.8.0
*/
maxIdleTimeout?: bigint | number | undefined;
/**
* @since v23.8.0
*/
activeConnectionIDLimit?: bigint | number | undefined;
/**
* @since v23.8.0
*/
ackDelayExponent?: bigint | number | undefined;
/**
* @since v23.8.0
*/
maxAckDelay?: bigint | number | undefined;
/**
* @since v23.8.0
*/
maxDatagramFrameSize?: bigint | number | undefined;
}
/**
* @since v23.8.0
*/
interface SessionOptions {
/**
* An endpoint to use.
* @since v23.8.0
*/
endpoint?: EndpointOptions | QuicEndpoint | undefined;
/**
* The ALPN protocol identifier.
* @since v23.8.0
*/
alpn?: string | undefined;
/**
* The CA certificates to use for sessions.
* @since v23.8.0
*/
ca?: ArrayBuffer | NodeJS.ArrayBufferView | ReadonlyArray<ArrayBuffer | NodeJS.ArrayBufferView> | undefined;
/**
* Specifies the congestion control algorithm that will be used.
* Must be set to one of either `'reno'`, `'cubic'`, or `'bbr'`.
*
* This is an advanced option that users typically won't have need to specify.
* @since v23.8.0
*/
cc?: `${constants.cc}` | undefined;
/**
* The TLS certificates to use for sessions.
* @since v23.8.0
*/
certs?: ArrayBuffer | NodeJS.ArrayBufferView | ReadonlyArray<ArrayBuffer | NodeJS.ArrayBufferView> | undefined;
/**
* The list of supported TLS 1.3 cipher algorithms.
* @since v23.8.0
*/
ciphers?: string | undefined;
/**
* The CRL to use for sessions.
* @since v23.8.0
*/
crl?: ArrayBuffer | NodeJS.ArrayBufferView | ReadonlyArray<ArrayBuffer | NodeJS.ArrayBufferView> | undefined;
/**
* The list of support TLS 1.3 cipher groups.
* @since v23.8.0
*/
groups?: string | undefined;
/**
* True to enable TLS keylogging output.
* @since v23.8.0
*/
keylog?: boolean | undefined;
/**
* The TLS crypto keys to use for sessions.
* @since v23.8.0
*/
keys?: KeyObject | webcrypto.CryptoKey | ReadonlyArray<KeyObject | webcrypto.CryptoKey> | undefined;
/**
* Specifies the maximum UDP packet payload size.
* @since v23.8.0
*/
maxPayloadSize?: bigint | number | undefined;
/**
* Specifies the maximum stream flow-control window size.
* @since v23.8.0
*/
maxStreamWindow?: bigint | number | undefined;
/**
* Specifies the maximum session flow-control window size.
* @since v23.8.0
*/
maxWindow?: bigint | number | undefined;
/**
* The minimum QUIC version number to allow. This is an advanced option that users
* typically won't have need to specify.
* @since v23.8.0
*/
minVersion?: number | undefined;
/**
* When the remote peer advertises a preferred address, this option specifies whether
* to use it or ignore it.
* @since v23.8.0
*/
preferredAddressPolicy?: "use" | "ignore" | "default" | undefined;
/**
* True if qlog output should be enabled.
* @since v23.8.0
*/
qlog?: boolean | undefined;
/**
* A session ticket to use for 0RTT session resumption.
* @since v23.8.0
*/
sessionTicket?: NodeJS.ArrayBufferView | undefined;
/**
* Specifies the maximum number of milliseconds a TLS handshake is permitted to take
* to complete before timing out.
* @since v23.8.0
*/
handshakeTimeout?: bigint | number | undefined;
/**
* The peer server name to target.
* @since v23.8.0
*/
sni?: string | undefined;
/**
* True to enable TLS tracing output.
* @since v23.8.0
*/
tlsTrace?: boolean | undefined;
/**
* The QUIC transport parameters to use for the session.
* @since v23.8.0
*/
transportParams?: TransportParams | undefined;
/**
* Specifies the maximum number of unacknowledged packets a session should allow.
* @since v23.8.0
*/
unacknowledgedPacketThreshold?: bigint | number | undefined;
/**
* True to require verification of TLS client certificate.
* @since v23.8.0
*/
verifyClient?: boolean | undefined;
/**
* True to require private key verification.
* @since v23.8.0
*/
verifyPrivateKey?: boolean | undefined;
/**
* The QUIC version number to use. This is an advanced option that users typically
* won't have need to specify.
* @since v23.8.0
*/
version?: number | undefined;
}
/**
* Initiate a new client-side session.
*
* ```js
* import { connect } from 'node:quic';
* import { Buffer } from 'node:buffer';
*
* const enc = new TextEncoder();
* const alpn = 'foo';
* const client = await connect('123.123.123.123:8888', { alpn });
* await client.createUnidirectionalStream({
* body: enc.encode('hello world'),
* });
* ```
*
* By default, every call to `connect(...)` will create a new local
* `QuicEndpoint` instance bound to a new random local IP port. To
* specify the exact local address to use, or to multiplex multiple
* QUIC sessions over a single local port, pass the `endpoint` option
* with either a `QuicEndpoint` or `EndpointOptions` as the argument.
*
* ```js
* import { QuicEndpoint, connect } from 'node:quic';
*
* const endpoint = new QuicEndpoint({
* address: '127.0.0.1:1234',
* });
*
* const client = await connect('123.123.123.123:8888', { endpoint });
* ```
* @since v23.8.0
*/
function connect(address: string | SocketAddress, options?: SessionOptions): Promise<QuicSession>;
/**
* Configures the endpoint to listen as a server. When a new session is initiated by
* a remote peer, the given `onsession` callback will be invoked with the created
* session.
*
* ```js
* import { listen } from 'node:quic';
*
* const endpoint = await listen((session) => {
* // ... handle the session
* });
*
* // Closing the endpoint allows any sessions open when close is called
* // to complete naturally while preventing new sessions from being
* // initiated. Once all existing sessions have finished, the endpoint
* // will be destroyed. The call returns a promise that is resolved once
* // the endpoint is destroyed.
* await endpoint.close();
* ```
*
* By default, every call to `listen(...)` will create a new local
* `QuicEndpoint` instance bound to a new random local IP port. To
* specify the exact local address to use, or to multiplex multiple
* QUIC sessions over a single local port, pass the `endpoint` option
* with either a `QuicEndpoint` or `EndpointOptions` as the argument.
*
* At most, any single `QuicEndpoint` can only be configured to listen as
* a server once.
* @since v23.8.0
*/
function listen(onsession: OnSessionCallback, options?: SessionOptions): Promise<QuicEndpoint>;
/**
* The endpoint configuration options passed when constructing a new `QuicEndpoint` instance.
* @since v23.8.0
*/
interface EndpointOptions {
/**
* If not specified the endpoint will bind to IPv4 `localhost` on a random port.
* @since v23.8.0
*/
address?: SocketAddress | string | undefined;
/**
* The endpoint maintains an internal cache of validated socket addresses as a
* performance optimization. This option sets the maximum number of addresses
* that are cache. This is an advanced option that users typically won't have
* need to specify.
* @since v23.8.0
*/
addressLRUSize?: bigint | number | undefined;
/**
* When `true`, indicates that the endpoint should bind only to IPv6 addresses.
* @since v23.8.0
*/
ipv6Only?: boolean | undefined;
/**
* Specifies the maximum number of concurrent sessions allowed per remote peer address.
* @since v23.8.0
*/
maxConnectionsPerHost?: bigint | number | undefined;
/**
* Specifies the maximum total number of concurrent sessions.
* @since v23.8.0
*/
maxConnectionsTotal?: bigint | number | undefined;
/**
* Specifies the maximum number of QUIC retry attempts allowed per remote peer address.
* @since v23.8.0
*/
maxRetries?: bigint | number | undefined;
/**
* Specifies the maximum number of stateless resets that are allowed per remote peer address.
* @since v23.8.0
*/
maxStatelessResetsPerHost?: bigint | number | undefined;
/**
* Specifies the length of time a QUIC retry token is considered valid.
* @since v23.8.0
*/
retryTokenExpiration?: bigint | number | undefined;
/**
* Specifies the 16-byte secret used to generate QUIC retry tokens.
* @since v23.8.0
*/
resetTokenSecret?: NodeJS.ArrayBufferView | undefined;
/**
* Specifies the length of time a QUIC token is considered valid.
* @since v23.8.0
*/
tokenExpiration?: bigint | number | undefined;
/**
* Specifies the 16-byte secret used to generate QUIC tokens.
* @since v23.8.0
*/
tokenSecret?: NodeJS.ArrayBufferView | undefined;
/**
* @since v23.8.0
*/
udpReceiveBufferSize?: number | undefined;
/**
* @since v23.8.0
*/
udpSendBufferSize?: number | undefined;
/**
* @since v23.8.0
*/
udpTTL?: number | undefined;
/**
* When `true`, requires that the endpoint validate peer addresses using retry packets
* while establishing a new connection.
* @since v23.8.0
*/
validateAddress?: boolean | undefined;
}
/**
* A `QuicEndpoint` encapsulates the local UDP-port binding for QUIC. It can be
* used as both a client and a server.
* @since v23.8.0
*/
class QuicEndpoint implements AsyncDisposable {
constructor(options?: EndpointOptions);
/**
* The local UDP socket address to which the endpoint is bound, if any.
*
* If the endpoint is not currently bound then the value will be `undefined`. Read only.
* @since v23.8.0
*/
readonly address: SocketAddress | undefined;
/**
* When `endpoint.busy` is set to true, the endpoint will temporarily reject
* new sessions from being created. Read/write.
*
* ```js
* // Mark the endpoint busy. New sessions will be prevented.
* endpoint.busy = true;
*
* // Mark the endpoint free. New session will be allowed.
* endpoint.busy = false;
* ```
*
* The `busy` property is useful when the endpoint is under heavy load and needs to
* temporarily reject new sessions while it catches up.
* @since v23.8.0
*/
busy: boolean;
/**
* Gracefully close the endpoint. The endpoint will close and destroy itself when
* all currently open sessions close. Once called, new sessions will be rejected.
*
* Returns a promise that is fulfilled when the endpoint is destroyed.
* @since v23.8.0
*/
close(): Promise<void>;
/**
* A promise that is fulfilled when the endpoint is destroyed. This will be the same promise that is
* returned by the `endpoint.close()` function. Read only.
* @since v23.8.0
*/
readonly closed: Promise<void>;
/**
* True if `endpoint.close()` has been called and closing the endpoint has not yet completed.
* Read only.
* @since v23.8.0
*/
readonly closing: boolean;
/**
* Forcefully closes the endpoint by forcing all open sessions to be immediately
* closed.
* @since v23.8.0
*/
destroy(error?: any): void;
/**
* True if `endpoint.destroy()` has been called. Read only.
* @since v23.8.0
*/
readonly destroyed: boolean;
/**
* The statistics collected for an active session. Read only.
* @since v23.8.0
*/
readonly stats: QuicEndpoint.Stats;
/**
* Calls `endpoint.close()` and returns a promise that fulfills when the
* endpoint has closed.
* @since v23.8.0
*/
[Symbol.asyncDispose](): Promise<void>;
}
namespace QuicEndpoint {
/**
* A view of the collected statistics for an endpoint.
* @since v23.8.0
*/
class Stats {
private constructor();
/**
* A timestamp indicating the moment the endpoint was created. Read only.
* @since v23.8.0
*/
readonly createdAt: bigint;
/**
* A timestamp indicating the moment the endpoint was destroyed. Read only.
* @since v23.8.0
*/
readonly destroyedAt: bigint;
/**
* The total number of bytes received by this endpoint. Read only.
* @since v23.8.0
*/
readonly bytesReceived: bigint;
/**
* The total number of bytes sent by this endpoint. Read only.
* @since v23.8.0
*/
readonly bytesSent: bigint;
/**
* The total number of QUIC packets successfully received by this endpoint. Read only.
* @since v23.8.0
*/
readonly packetsReceived: bigint;
/**
* The total number of QUIC packets successfully sent by this endpoint. Read only.
* @since v23.8.0
*/
readonly packetsSent: bigint;
/**
* The total number of peer-initiated sessions received by this endpoint. Read only.
* @since v23.8.0
*/
readonly serverSessions: bigint;
/**
* The total number of sessions initiated by this endpoint. Read only.
* @since v23.8.0
*/
readonly clientSessions: bigint;
/**
* The total number of times an initial packet was rejected due to the
* endpoint being marked busy. Read only.
* @since v23.8.0
*/
readonly serverBusyCount: bigint;
/**
* The total number of QUIC retry attempts on this endpoint. Read only.
* @since v23.8.0
*/
readonly retryCount: bigint;
/**
* The total number sessions rejected due to QUIC version mismatch. Read only.
* @since v23.8.0
*/
readonly versionNegotiationCount: bigint;
/**
* The total number of stateless resets handled by this endpoint. Read only.
* @since v23.8.0
*/
readonly statelessResetCount: bigint;
/**
* The total number of sessions that were closed before handshake completed. Read only.
* @since v23.8.0
*/
readonly immediateCloseCount: bigint;
}
}
interface CreateStreamOptions {
body?: ArrayBuffer | NodeJS.ArrayBufferView | Blob | undefined;
sendOrder?: number | undefined;
}
interface SessionPath {
local: SocketAddress;
remote: SocketAddress;
}
/**
* A `QuicSession` represents the local side of a QUIC connection.
* @since v23.8.0
*/
class QuicSession implements AsyncDisposable {
private constructor();
/**
* Initiate a graceful close of the session. Existing streams will be allowed
* to complete but no new streams will be opened. Once all streams have closed,
* the session will be destroyed. The returned promise will be fulfilled once
* the session has been destroyed.
* @since v23.8.0
*/
close(): Promise<void>;
/**
* A promise that is fulfilled once the session is destroyed.
* @since v23.8.0
*/
readonly closed: Promise<void>;
/**
* Immediately destroy the session. All streams will be destroys and the
* session will be closed.
* @since v23.8.0
*/
destroy(error?: any): void;
/**
* True if `session.destroy()` has been called. Read only.
* @since v23.8.0
*/
readonly destroyed: boolean;
/**
* The endpoint that created this session. Read only.
* @since v23.8.0
*/
readonly endpoint: QuicEndpoint;
/**
* The callback to invoke when a new stream is initiated by a remote peer. Read/write.
* @since v23.8.0
*/
onstream: OnStreamCallback | undefined;
/**
* The callback to invoke when a new datagram is received from a remote peer. Read/write.
* @since v23.8.0
*/
ondatagram: OnDatagramCallback | undefined;
/**
* The callback to invoke when the status of a datagram is updated. Read/write.
* @since v23.8.0
*/
ondatagramstatus: OnDatagramStatusCallback | undefined;
/**
* The callback to invoke when the path validation is updated. Read/write.
* @since v23.8.0
*/
onpathvalidation: OnPathValidationCallback | undefined;
/**
* The callback to invoke when a new session ticket is received. Read/write.
* @since v23.8.0
*/
onsessionticket: OnSessionTicketCallback | undefined;
/**
* The callback to invoke when a version negotiation is initiated. Read/write.
* @since v23.8.0
*/
onversionnegotiation: OnVersionNegotiationCallback | undefined;
/**
* The callback to invoke when the TLS handshake is completed. Read/write.
* @since v23.8.0
*/
onhandshake: OnHandshakeCallback | undefined;
/**
* Open a new bidirectional stream. If the `body` option is not specified,
* the outgoing stream will be half-closed.
* @since v23.8.0
*/
createBidirectionalStream(options?: CreateStreamOptions): Promise<QuicStream>;
/**
* Open a new unidirectional stream. If the `body` option is not specified,
* the outgoing stream will be closed.
* @since v23.8.0
*/
createUnidirectionalStream(options?: CreateStreamOptions): Promise<QuicStream>;
/**
* The local and remote socket addresses associated with the session. Read only.
* @since v23.8.0
*/
path: SessionPath | undefined;
/**
* Sends an unreliable datagram to the remote peer, returning the datagram ID.
* If the datagram payload is specified as an `ArrayBufferView`, then ownership of
* that view will be transfered to the underlying stream.
* @since v23.8.0
*/
sendDatagram(datagram: string | NodeJS.ArrayBufferView): bigint;
/**
* Return the current statistics for the session. Read only.
* @since v23.8.0
*/
readonly stats: QuicSession.Stats;
/**
* Initiate a key update for the session.
* @since v23.8.0
*/
updateKey(): void;
/**
* Calls `session.close()` and returns a promise that fulfills when the
* session has closed.
* @since v23.8.0
*/
[Symbol.asyncDispose](): Promise<void>;
}
namespace QuicSession {
/**
* @since v23.8.0
*/
class Stats {
private constructor();
/**
* @since v23.8.0
*/
readonly createdAt: bigint;
/**
* @since v23.8.0
*/
readonly closingAt: bigint;
/**
* @since v23.8.0
*/
readonly handshakeCompletedAt: bigint;
/**
* @since v23.8.0
*/
readonly handshakeConfirmedAt: bigint;
/**
* @since v23.8.0
*/
readonly bytesReceived: bigint;
/**
* @since v23.8.0
*/
readonly bytesSent: bigint;
/**
* @since v23.8.0
*/
readonly bidiInStreamCount: bigint;
/**
* @since v23.8.0
*/
readonly bidiOutStreamCount: bigint;
/**
* @since v23.8.0
*/
readonly uniInStreamCount: bigint;
/**
* @since v23.8.0
*/
readonly uniOutStreamCount: bigint;
/**
* @since v23.8.0
*/
readonly maxBytesInFlights: bigint;
/**
* @since v23.8.0
*/
readonly bytesInFlight: bigint;
/**
* @since v23.8.0
*/
readonly blockCount: bigint;
/**
* @since v23.8.0
*/
readonly cwnd: bigint;
/**
* @since v23.8.0
*/
readonly latestRtt: bigint;
/**
* @since v23.8.0
*/
readonly minRtt: bigint;
/**
* @since v23.8.0
*/
readonly rttVar: bigint;
/**
* @since v23.8.0
*/
readonly smoothedRtt: bigint;
/**
* @since v23.8.0
*/
readonly ssthresh: bigint;
/**
* @since v23.8.0
*/
readonly datagramsReceived: bigint;
/**
* @since v23.8.0
*/
readonly datagramsSent: bigint;
/**
* @since v23.8.0
*/
readonly datagramsAcknowledged: bigint;
/**
* @since v23.8.0
*/
readonly datagramsLost: bigint;
}
}
/**
* @since v23.8.0
*/
class QuicStream {
private constructor();
/**
* A promise that is fulfilled when the stream is fully closed.
* @since v23.8.0
*/
readonly closed: Promise<void>;
/**
* Immediately and abruptly destroys the stream.
* @since v23.8.0
*/
destroy(error?: any): void;
/**
* True if `stream.destroy()` has been called.
* @since v23.8.0
*/
readonly destroyed: boolean;
/**
* The directionality of the stream. Read only.
* @since v23.8.0
*/
readonly direction: "bidi" | "uni";
/**
* The stream ID. Read only.
* @since v23.8.0
*/
readonly id: bigint;
/**
* The callback to invoke when the stream is blocked. Read/write.
* @since v23.8.0
*/
onblocked: OnBlockedCallback | undefined;
/**
* The callback to invoke when the stream is reset. Read/write.
* @since v23.8.0
*/
onreset: OnStreamErrorCallback | undefined;
/**
* @since v23.8.0
*/
readonly readable: ReadableStream<Uint8Array>;
/**
* The session that created this stream. Read only.
* @since v23.8.0
*/
readonly session: QuicSession;
/**
* The current statistics for the stream. Read only.
* @since v23.8.0
*/
readonly stats: QuicStream.Stats;
}
namespace QuicStream {
/**
* @since v23.8.0
*/
class Stats {
private constructor();
/**
* @since v23.8.0
*/
readonly ackedAt: bigint;
/**
* @since v23.8.0
*/
readonly bytesReceived: bigint;
/**
* @since v23.8.0
*/
readonly bytesSent: bigint;
/**
* @since v23.8.0
*/
readonly createdAt: bigint;
/**
* @since v23.8.0
*/
readonly destroyedAt: bigint;
/**
* @since v23.8.0
*/
readonly finalSize: bigint;
/**
* @since v23.8.0
*/
readonly isConnected: bigint;
/**
* @since v23.8.0
*/
readonly maxOffset: bigint;
/**
* @since v23.8.0
*/
readonly maxOffsetAcknowledged: bigint;
/**
* @since v23.8.0
*/
readonly maxOffsetReceived: bigint;
/**
* @since v23.8.0
*/
readonly openedAt: bigint;
/**
* @since v23.8.0
*/
readonly receivedAt: bigint;
}
}
namespace constants {
enum cc {
RENO = "reno",
CUBIC = "cubic",
BBR = "bbr",
}
const DEFAULT_CIPHERS: string;
const DEFAULT_GROUPS: string;
}
}

542
back/node_modules/@types/node/readline.d.ts generated vendored Normal file
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@ -0,0 +1,542 @@
/**
* The `node:readline` module provides an interface for reading data from a [Readable](https://nodejs.org/docs/latest-v25.x/api/stream.html#readable-streams) stream
* (such as [`process.stdin`](https://nodejs.org/docs/latest-v25.x/api/process.html#processstdin)) one line at a time.
*
* To use the promise-based APIs:
*
* ```js
* import * as readline from 'node:readline/promises';
* ```
*
* To use the callback and sync APIs:
*
* ```js
* import * as readline from 'node:readline';
* ```
*
* The following simple example illustrates the basic use of the `node:readline` module.
*
* ```js
* import * as readline from 'node:readline/promises';
* import { stdin as input, stdout as output } from 'node:process';
*
* const rl = readline.createInterface({ input, output });
*
* const answer = await rl.question('What do you think of Node.js? ');
*
* console.log(`Thank you for your valuable feedback: ${answer}`);
*
* rl.close();
* ```
*
* Once this code is invoked, the Node.js application will not terminate until the `readline.Interface` is closed because the interface waits for data to be
* received on the `input` stream.
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/readline.js)
*/
declare module "node:readline" {
import { Abortable, EventEmitter, InternalEventEmitter } from "node:events";
interface Key {
sequence?: string | undefined;
name?: string | undefined;
ctrl?: boolean | undefined;
meta?: boolean | undefined;
shift?: boolean | undefined;
}
interface InterfaceEventMap {
"close": [];
"error": [error: Error];
"history": [history: string[]];
"line": [input: string];
"pause": [];
"resume": [];
"SIGCONT": [];
"SIGINT": [];
"SIGTSTP": [];
}
/**
* Instances of the `readline.Interface` class are constructed using the `readline.createInterface()` method. Every instance is associated with a
* single `input` [Readable](https://nodejs.org/docs/latest-v25.x/api/stream.html#readable-streams) stream and a single `output` [Writable](https://nodejs.org/docs/latest-v25.x/api/stream.html#writable-streams) stream.
* The `output` stream is used to print prompts for user input that arrives on,
* and is read from, the `input` stream.
* @since v0.1.104
*/
class Interface implements EventEmitter, Disposable {
/**
* NOTE: According to the documentation:
*
* > Instances of the `readline.Interface` class are constructed using the
* > `readline.createInterface()` method.
*
* @see https://nodejs.org/dist/latest-v25.x/docs/api/readline.html#class-interfaceconstructor
*/
protected constructor(
input: NodeJS.ReadableStream,
output?: NodeJS.WritableStream,
completer?: Completer | AsyncCompleter,
terminal?: boolean,
);
/**
* NOTE: According to the documentation:
*
* > Instances of the `readline.Interface` class are constructed using the
* > `readline.createInterface()` method.
*
* @see https://nodejs.org/dist/latest-v25.x/docs/api/readline.html#class-interfaceconstructor
*/
protected constructor(options: ReadLineOptions);
readonly terminal: boolean;
/**
* The current input data being processed by node.
*
* This can be used when collecting input from a TTY stream to retrieve the
* current value that has been processed thus far, prior to the `line` event
* being emitted. Once the `line` event has been emitted, this property will
* be an empty string.
*
* Be aware that modifying the value during the instance runtime may have
* unintended consequences if `rl.cursor` is not also controlled.
*
* **If not using a TTY stream for input, use the `'line'` event.**
*
* One possible use case would be as follows:
*
* ```js
* const values = ['lorem ipsum', 'dolor sit amet'];
* const rl = readline.createInterface(process.stdin);
* const showResults = debounce(() => {
* console.log(
* '\n',
* values.filter((val) => val.startsWith(rl.line)).join(' '),
* );
* }, 300);
* process.stdin.on('keypress', (c, k) => {
* showResults();
* });
* ```
* @since v0.1.98
*/
readonly line: string;
/**
* The cursor position relative to `rl.line`.
*
* This will track where the current cursor lands in the input string, when
* reading input from a TTY stream. The position of cursor determines the
* portion of the input string that will be modified as input is processed,
* as well as the column where the terminal caret will be rendered.
* @since v0.1.98
*/
readonly cursor: number;
/**
* The `rl.getPrompt()` method returns the current prompt used by `rl.prompt()`.
* @since v15.3.0, v14.17.0
* @return the current prompt string
*/
getPrompt(): string;
/**
* The `rl.setPrompt()` method sets the prompt that will be written to `output` whenever `rl.prompt()` is called.
* @since v0.1.98
*/
setPrompt(prompt: string): void;
/**
* The `rl.prompt()` method writes the `Interface` instances configured`prompt` to a new line in `output` in order to provide a user with a new
* location at which to provide input.
*
* When called, `rl.prompt()` will resume the `input` stream if it has been
* paused.
*
* If the `Interface` was created with `output` set to `null` or `undefined` the prompt is not written.
* @since v0.1.98
* @param preserveCursor If `true`, prevents the cursor placement from being reset to `0`.
*/
prompt(preserveCursor?: boolean): void;
/**
* The `rl.question()` method displays the `query` by writing it to the `output`,
* waits for user input to be provided on `input`, then invokes the `callback` function passing the provided input as the first argument.
*
* When called, `rl.question()` will resume the `input` stream if it has been
* paused.
*
* If the `Interface` was created with `output` set to `null` or `undefined` the `query` is not written.
*
* The `callback` function passed to `rl.question()` does not follow the typical
* pattern of accepting an `Error` object or `null` as the first argument.
* The `callback` is called with the provided answer as the only argument.
*
* An error will be thrown if calling `rl.question()` after `rl.close()`.
*
* Example usage:
*
* ```js
* rl.question('What is your favorite food? ', (answer) => {
* console.log(`Oh, so your favorite food is ${answer}`);
* });
* ```
*
* Using an `AbortController` to cancel a question.
*
* ```js
* const ac = new AbortController();
* const signal = ac.signal;
*
* rl.question('What is your favorite food? ', { signal }, (answer) => {
* console.log(`Oh, so your favorite food is ${answer}`);
* });
*
* signal.addEventListener('abort', () => {
* console.log('The food question timed out');
* }, { once: true });
*
* setTimeout(() => ac.abort(), 10000);
* ```
* @since v0.3.3
* @param query A statement or query to write to `output`, prepended to the prompt.
* @param callback A callback function that is invoked with the user's input in response to the `query`.
*/
question(query: string, callback: (answer: string) => void): void;
question(query: string, options: Abortable, callback: (answer: string) => void): void;
/**
* The `rl.pause()` method pauses the `input` stream, allowing it to be resumed
* later if necessary.
*
* Calling `rl.pause()` does not immediately pause other events (including `'line'`) from being emitted by the `Interface` instance.
* @since v0.3.4
*/
pause(): this;
/**
* The `rl.resume()` method resumes the `input` stream if it has been paused.
* @since v0.3.4
*/
resume(): this;
/**
* The `rl.close()` method closes the `Interface` instance and
* relinquishes control over the `input` and `output` streams. When called,
* the `'close'` event will be emitted.
*
* Calling `rl.close()` does not immediately stop other events (including `'line'`)
* from being emitted by the `Interface` instance.
* @since v0.1.98
*/
close(): void;
/**
* Alias for `rl.close()`.
* @since v22.15.0
*/
[Symbol.dispose](): void;
/**
* The `rl.write()` method will write either `data` or a key sequence identified
* by `key` to the `output`. The `key` argument is supported only if `output` is
* a `TTY` text terminal. See `TTY keybindings` for a list of key
* combinations.
*
* If `key` is specified, `data` is ignored.
*
* When called, `rl.write()` will resume the `input` stream if it has been
* paused.
*
* If the `Interface` was created with `output` set to `null` or `undefined` the `data` and `key` are not written.
*
* ```js
* rl.write('Delete this!');
* // Simulate Ctrl+U to delete the line written previously
* rl.write(null, { ctrl: true, name: 'u' });
* ```
*
* The `rl.write()` method will write the data to the `readline` `Interface`'s `input` _as if it were provided by the user_.
* @since v0.1.98
*/
write(data: string | Buffer, key?: Key): void;
write(data: undefined | null | string | Buffer, key: Key): void;
/**
* Returns the real position of the cursor in relation to the input
* prompt + string. Long input (wrapping) strings, as well as multiple
* line prompts are included in the calculations.
* @since v13.5.0, v12.16.0
*/
getCursorPos(): CursorPos;
[Symbol.asyncIterator](): NodeJS.AsyncIterator<string>;
}
interface Interface extends InternalEventEmitter<InterfaceEventMap> {}
type ReadLine = Interface; // type forwarded for backwards compatibility
type Completer = (line: string) => CompleterResult;
type AsyncCompleter = (
line: string,
callback: (err?: null | Error, result?: CompleterResult) => void,
) => void;
type CompleterResult = [string[], string];
interface ReadLineOptions {
/**
* The [`Readable`](https://nodejs.org/docs/latest-v25.x/api/stream.html#readable-streams) stream to listen to
*/
input: NodeJS.ReadableStream;
/**
* The [`Writable`](https://nodejs.org/docs/latest-v25.x/api/stream.html#writable-streams) stream to write readline data to.
*/
output?: NodeJS.WritableStream | undefined;
/**
* An optional function used for Tab autocompletion.
*/
completer?: Completer | AsyncCompleter | undefined;
/**
* `true` if the `input` and `output` streams should be treated like a TTY,
* and have ANSI/VT100 escape codes written to it.
* Default: checking `isTTY` on the `output` stream upon instantiation.
*/
terminal?: boolean | undefined;
/**
* Initial list of history lines.
* This option makes sense only if `terminal` is set to `true` by the user or by an internal `output` check,
* otherwise the history caching mechanism is not initialized at all.
* @default []
*/
history?: string[] | undefined;
/**
* Maximum number of history lines retained.
* To disable the history set this value to `0`.
* This option makes sense only if `terminal` is set to `true` by the user or by an internal `output` check,
* otherwise the history caching mechanism is not initialized at all.
* @default 30
*/
historySize?: number | undefined;
/**
* If `true`, when a new input line added to the history list duplicates an older one,
* this removes the older line from the list.
* @default false
*/
removeHistoryDuplicates?: boolean | undefined;
/**
* The prompt string to use.
* @default "> "
*/
prompt?: string | undefined;
/**
* If the delay between `\r` and `\n` exceeds `crlfDelay` milliseconds,
* both `\r` and `\n` will be treated as separate end-of-line input.
* `crlfDelay` will be coerced to a number no less than `100`.
* It can be set to `Infinity`, in which case
* `\r` followed by `\n` will always be considered a single newline
* (which may be reasonable for [reading files](https://nodejs.org/docs/latest-v25.x/api/readline.html#example-read-file-stream-line-by-line) with `\r\n` line delimiter).
* @default 100
*/
crlfDelay?: number | undefined;
/**
* The duration `readline` will wait for a character
* (when reading an ambiguous key sequence in milliseconds
* one that can both form a complete key sequence using the input read so far
* and can take additional input to complete a longer key sequence).
* @default 500
*/
escapeCodeTimeout?: number | undefined;
/**
* The number of spaces a tab is equal to (minimum 1).
* @default 8
*/
tabSize?: number | undefined;
/**
* Allows closing the interface using an AbortSignal.
* Aborting the signal will internally call `close` on the interface.
*/
signal?: AbortSignal | undefined;
}
/**
* The `readline.createInterface()` method creates a new `readline.Interface` instance.
*
* ```js
* import readline from 'node:readline';
* const rl = readline.createInterface({
* input: process.stdin,
* output: process.stdout,
* });
* ```
*
* Once the `readline.Interface` instance is created, the most common case is to
* listen for the `'line'` event:
*
* ```js
* rl.on('line', (line) => {
* console.log(`Received: ${line}`);
* });
* ```
*
* If `terminal` is `true` for this instance then the `output` stream will get
* the best compatibility if it defines an `output.columns` property and emits
* a `'resize'` event on the `output` if or when the columns ever change
* (`process.stdout` does this automatically when it is a TTY).
*
* When creating a `readline.Interface` using `stdin` as input, the program
* will not terminate until it receives an [EOF character](https://en.wikipedia.org/wiki/End-of-file#EOF_character). To exit without
* waiting for user input, call `process.stdin.unref()`.
* @since v0.1.98
*/
function createInterface(
input: NodeJS.ReadableStream,
output?: NodeJS.WritableStream,
completer?: Completer | AsyncCompleter,
terminal?: boolean,
): Interface;
function createInterface(options: ReadLineOptions): Interface;
/**
* The `readline.emitKeypressEvents()` method causes the given `Readable` stream to begin emitting `'keypress'` events corresponding to received input.
*
* Optionally, `interface` specifies a `readline.Interface` instance for which
* autocompletion is disabled when copy-pasted input is detected.
*
* If the `stream` is a `TTY`, then it must be in raw mode.
*
* This is automatically called by any readline instance on its `input` if the `input` is a terminal. Closing the `readline` instance does not stop
* the `input` from emitting `'keypress'` events.
*
* ```js
* readline.emitKeypressEvents(process.stdin);
* if (process.stdin.isTTY)
* process.stdin.setRawMode(true);
* ```
*
* ## Example: Tiny CLI
*
* The following example illustrates the use of `readline.Interface` class to
* implement a small command-line interface:
*
* ```js
* import readline from 'node:readline';
* const rl = readline.createInterface({
* input: process.stdin,
* output: process.stdout,
* prompt: 'OHAI> ',
* });
*
* rl.prompt();
*
* rl.on('line', (line) => {
* switch (line.trim()) {
* case 'hello':
* console.log('world!');
* break;
* default:
* console.log(`Say what? I might have heard '${line.trim()}'`);
* break;
* }
* rl.prompt();
* }).on('close', () => {
* console.log('Have a great day!');
* process.exit(0);
* });
* ```
*
* ## Example: Read file stream line-by-Line
*
* A common use case for `readline` is to consume an input file one line at a
* time. The easiest way to do so is leveraging the `fs.ReadStream` API as
* well as a `for await...of` loop:
*
* ```js
* import fs from 'node:fs';
* import readline from 'node:readline';
*
* async function processLineByLine() {
* const fileStream = fs.createReadStream('input.txt');
*
* const rl = readline.createInterface({
* input: fileStream,
* crlfDelay: Infinity,
* });
* // Note: we use the crlfDelay option to recognize all instances of CR LF
* // ('\r\n') in input.txt as a single line break.
*
* for await (const line of rl) {
* // Each line in input.txt will be successively available here as `line`.
* console.log(`Line from file: ${line}`);
* }
* }
*
* processLineByLine();
* ```
*
* Alternatively, one could use the `'line'` event:
*
* ```js
* import fs from 'node:fs';
* import readline from 'node:readline';
*
* const rl = readline.createInterface({
* input: fs.createReadStream('sample.txt'),
* crlfDelay: Infinity,
* });
*
* rl.on('line', (line) => {
* console.log(`Line from file: ${line}`);
* });
* ```
*
* Currently, `for await...of` loop can be a bit slower. If `async` / `await` flow and speed are both essential, a mixed approach can be applied:
*
* ```js
* import { once } from 'node:events';
* import { createReadStream } from 'node:fs';
* import { createInterface } from 'node:readline';
*
* (async function processLineByLine() {
* try {
* const rl = createInterface({
* input: createReadStream('big-file.txt'),
* crlfDelay: Infinity,
* });
*
* rl.on('line', (line) => {
* // Process the line.
* });
*
* await once(rl, 'close');
*
* console.log('File processed.');
* } catch (err) {
* console.error(err);
* }
* })();
* ```
* @since v0.7.7
*/
function emitKeypressEvents(stream: NodeJS.ReadableStream, readlineInterface?: Interface): void;
type Direction = -1 | 0 | 1;
interface CursorPos {
rows: number;
cols: number;
}
/**
* The `readline.clearLine()` method clears current line of given [TTY](https://nodejs.org/docs/latest-v25.x/api/tty.html) stream
* in a specified direction identified by `dir`.
* @since v0.7.7
* @param callback Invoked once the operation completes.
* @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
*/
function clearLine(stream: NodeJS.WritableStream, dir: Direction, callback?: () => void): boolean;
/**
* The `readline.clearScreenDown()` method clears the given [TTY](https://nodejs.org/docs/latest-v25.x/api/tty.html) stream from
* the current position of the cursor down.
* @since v0.7.7
* @param callback Invoked once the operation completes.
* @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
*/
function clearScreenDown(stream: NodeJS.WritableStream, callback?: () => void): boolean;
/**
* The `readline.cursorTo()` method moves cursor to the specified position in a
* given [TTY](https://nodejs.org/docs/latest-v25.x/api/tty.html) `stream`.
* @since v0.7.7
* @param callback Invoked once the operation completes.
* @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
*/
function cursorTo(stream: NodeJS.WritableStream, x: number, y?: number, callback?: () => void): boolean;
/**
* The `readline.moveCursor()` method moves the cursor _relative_ to its current
* position in a given [TTY](https://nodejs.org/docs/latest-v25.x/api/tty.html) `stream`.
* @since v0.7.7
* @param callback Invoked once the operation completes.
* @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
*/
function moveCursor(stream: NodeJS.WritableStream, dx: number, dy: number, callback?: () => void): boolean;
}
declare module "node:readline" {
export * as promises from "node:readline/promises";
}
declare module "readline" {
export * from "node:readline";
}

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/**
* @since v17.0.0
*/
declare module "node:readline/promises" {
import { Abortable } from "node:events";
import {
CompleterResult,
Direction,
Interface as _Interface,
ReadLineOptions as _ReadLineOptions,
} from "node:readline";
/**
* Instances of the `readlinePromises.Interface` class are constructed using the `readlinePromises.createInterface()` method. Every instance is associated with a
* single `input` `Readable` stream and a single `output` `Writable` stream.
* The `output` stream is used to print prompts for user input that arrives on,
* and is read from, the `input` stream.
* @since v17.0.0
*/
class Interface extends _Interface {
/**
* The `rl.question()` method displays the `query` by writing it to the `output`,
* waits for user input to be provided on `input`, then invokes the `callback` function passing the provided input as the first argument.
*
* When called, `rl.question()` will resume the `input` stream if it has been
* paused.
*
* If the `Interface` was created with `output` set to `null` or `undefined` the `query` is not written.
*
* If the question is called after `rl.close()`, it returns a rejected promise.
*
* Example usage:
*
* ```js
* const answer = await rl.question('What is your favorite food? ');
* console.log(`Oh, so your favorite food is ${answer}`);
* ```
*
* Using an `AbortSignal` to cancel a question.
*
* ```js
* const signal = AbortSignal.timeout(10_000);
*
* signal.addEventListener('abort', () => {
* console.log('The food question timed out');
* }, { once: true });
*
* const answer = await rl.question('What is your favorite food? ', { signal });
* console.log(`Oh, so your favorite food is ${answer}`);
* ```
* @since v17.0.0
* @param query A statement or query to write to `output`, prepended to the prompt.
* @return A promise that is fulfilled with the user's input in response to the `query`.
*/
question(query: string): Promise<string>;
question(query: string, options: Abortable): Promise<string>;
}
/**
* @since v17.0.0
*/
class Readline {
/**
* @param stream A TTY stream.
*/
constructor(
stream: NodeJS.WritableStream,
options?: {
autoCommit?: boolean | undefined;
},
);
/**
* The `rl.clearLine()` method adds to the internal list of pending action an
* action that clears current line of the associated `stream` in a specified
* direction identified by `dir`.
* Call `rl.commit()` to see the effect of this method, unless `autoCommit: true` was passed to the constructor.
* @since v17.0.0
* @return this
*/
clearLine(dir: Direction): this;
/**
* The `rl.clearScreenDown()` method adds to the internal list of pending action an
* action that clears the associated stream from the current position of the
* cursor down.
* Call `rl.commit()` to see the effect of this method, unless `autoCommit: true` was passed to the constructor.
* @since v17.0.0
* @return this
*/
clearScreenDown(): this;
/**
* The `rl.commit()` method sends all the pending actions to the associated `stream` and clears the internal list of pending actions.
* @since v17.0.0
*/
commit(): Promise<void>;
/**
* The `rl.cursorTo()` method adds to the internal list of pending action an action
* that moves cursor to the specified position in the associated `stream`.
* Call `rl.commit()` to see the effect of this method, unless `autoCommit: true` was passed to the constructor.
* @since v17.0.0
* @return this
*/
cursorTo(x: number, y?: number): this;
/**
* The `rl.moveCursor()` method adds to the internal list of pending action an
* action that moves the cursor _relative_ to its current position in the
* associated `stream`.
* Call `rl.commit()` to see the effect of this method, unless `autoCommit: true` was passed to the constructor.
* @since v17.0.0
* @return this
*/
moveCursor(dx: number, dy: number): this;
/**
* The `rl.rollback` methods clears the internal list of pending actions without
* sending it to the associated `stream`.
* @since v17.0.0
* @return this
*/
rollback(): this;
}
type Completer = (line: string) => CompleterResult | Promise<CompleterResult>;
interface ReadLineOptions extends Omit<_ReadLineOptions, "completer"> {
/**
* An optional function used for Tab autocompletion.
*/
completer?: Completer | undefined;
}
/**
* The `readlinePromises.createInterface()` method creates a new `readlinePromises.Interface` instance.
*
* ```js
* import readlinePromises from 'node:readline/promises';
* const rl = readlinePromises.createInterface({
* input: process.stdin,
* output: process.stdout,
* });
* ```
*
* Once the `readlinePromises.Interface` instance is created, the most common case
* is to listen for the `'line'` event:
*
* ```js
* rl.on('line', (line) => {
* console.log(`Received: ${line}`);
* });
* ```
*
* If `terminal` is `true` for this instance then the `output` stream will get
* the best compatibility if it defines an `output.columns` property and emits
* a `'resize'` event on the `output` if or when the columns ever change
* (`process.stdout` does this automatically when it is a TTY).
* @since v17.0.0
*/
function createInterface(
input: NodeJS.ReadableStream,
output?: NodeJS.WritableStream,
completer?: Completer,
terminal?: boolean,
): Interface;
function createInterface(options: ReadLineOptions): Interface;
}
declare module "readline/promises" {
export * from "node:readline/promises";
}

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/**
* The `node:repl` module provides a Read-Eval-Print-Loop (REPL) implementation
* that is available both as a standalone program or includible in other
* applications. It can be accessed using:
*
* ```js
* import repl from 'node:repl';
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/repl.js)
*/
declare module "node:repl" {
import { AsyncCompleter, Completer, Interface, InterfaceEventMap } from "node:readline";
import { InspectOptions } from "node:util";
import { Context } from "node:vm";
interface ReplOptions {
/**
* The input prompt to display.
* @default "> "
*/
prompt?: string | undefined;
/**
* The `Readable` stream from which REPL input will be read.
* @default process.stdin
*/
input?: NodeJS.ReadableStream | undefined;
/**
* The `Writable` stream to which REPL output will be written.
* @default process.stdout
*/
output?: NodeJS.WritableStream | undefined;
/**
* If `true`, specifies that the output should be treated as a TTY terminal, and have
* ANSI/VT100 escape codes written to it.
* Default: checking the value of the `isTTY` property on the output stream upon
* instantiation.
*/
terminal?: boolean | undefined;
/**
* The function to be used when evaluating each given line of input.
* **Default:** an async wrapper for the JavaScript `eval()` function. An `eval` function can
* error with `repl.Recoverable` to indicate the input was incomplete and prompt for
* additional lines. See the [custom evaluation functions](https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#custom-evaluation-functions)
* section for more details.
*/
eval?: REPLEval | undefined;
/**
* Defines if the repl prints output previews or not.
* @default `true` Always `false` in case `terminal` is falsy.
*/
preview?: boolean | undefined;
/**
* If `true`, specifies that the default `writer` function should include ANSI color
* styling to REPL output. If a custom `writer` function is provided then this has no
* effect.
* @default the REPL instance's `terminal` value
*/
useColors?: boolean | undefined;
/**
* If `true`, specifies that the default evaluation function will use the JavaScript
* `global` as the context as opposed to creating a new separate context for the REPL
* instance. The node CLI REPL sets this value to `true`.
* @default false
*/
useGlobal?: boolean | undefined;
/**
* If `true`, specifies that the default writer will not output the return value of a
* command if it evaluates to `undefined`.
* @default false
*/
ignoreUndefined?: boolean | undefined;
/**
* The function to invoke to format the output of each command before writing to `output`.
* @default a wrapper for `util.inspect`
*
* @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_customizing_repl_output
*/
writer?: REPLWriter | undefined;
/**
* An optional function used for custom Tab auto completion.
*
* @see https://nodejs.org/dist/latest-v25.x/docs/api/readline.html#readline_use_of_the_completer_function
*/
completer?: Completer | AsyncCompleter | undefined;
/**
* A flag that specifies whether the default evaluator executes all JavaScript commands in
* strict mode or default (sloppy) mode.
* Accepted values are:
* - `repl.REPL_MODE_SLOPPY` - evaluates expressions in sloppy mode.
* - `repl.REPL_MODE_STRICT` - evaluates expressions in strict mode. This is equivalent to
* prefacing every repl statement with `'use strict'`.
*/
replMode?: typeof REPL_MODE_SLOPPY | typeof REPL_MODE_STRICT | undefined;
/**
* Stop evaluating the current piece of code when `SIGINT` is received, i.e. `Ctrl+C` is
* pressed. This cannot be used together with a custom `eval` function.
* @default false
*/
breakEvalOnSigint?: boolean | undefined;
}
type REPLEval = (
this: REPLServer,
evalCmd: string,
context: Context,
file: string,
cb: (err: Error | null, result: any) => void,
) => void;
type REPLWriter = (this: REPLServer, obj: any) => string;
/**
* This is the default "writer" value, if none is passed in the REPL options,
* and it can be overridden by custom print functions.
*/
const writer: REPLWriter & {
options: InspectOptions;
};
type REPLCommandAction = (this: REPLServer, text: string) => void;
interface REPLCommand {
/**
* Help text to be displayed when `.help` is entered.
*/
help?: string | undefined;
/**
* The function to execute, optionally accepting a single string argument.
*/
action: REPLCommandAction;
}
interface REPLServerSetupHistoryOptions {
filePath?: string | undefined;
size?: number | undefined;
removeHistoryDuplicates?: boolean | undefined;
onHistoryFileLoaded?: ((err: Error | null, repl: REPLServer) => void) | undefined;
}
interface REPLServerEventMap extends InterfaceEventMap {
"exit": [];
"reset": [context: Context];
}
/**
* Instances of `repl.REPLServer` are created using the {@link start} method
* or directly using the JavaScript `new` keyword.
*
* ```js
* import repl from 'node:repl';
*
* const options = { useColors: true };
*
* const firstInstance = repl.start(options);
* const secondInstance = new repl.REPLServer(options);
* ```
* @since v0.1.91
*/
class REPLServer extends Interface {
/**
* NOTE: According to the documentation:
*
* > Instances of `repl.REPLServer` are created using the `repl.start()` method and
* > _should not_ be created directly using the JavaScript `new` keyword.
*
* `REPLServer` cannot be subclassed due to implementation specifics in NodeJS.
*
* @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_class_replserver
*/
private constructor();
/**
* The `vm.Context` provided to the `eval` function to be used for JavaScript
* evaluation.
*/
readonly context: Context;
/**
* @deprecated since v14.3.0 - Use `input` instead.
*/
readonly inputStream: NodeJS.ReadableStream;
/**
* @deprecated since v14.3.0 - Use `output` instead.
*/
readonly outputStream: NodeJS.WritableStream;
/**
* The `Readable` stream from which REPL input will be read.
*/
readonly input: NodeJS.ReadableStream;
/**
* The `Writable` stream to which REPL output will be written.
*/
readonly output: NodeJS.WritableStream;
/**
* The commands registered via `replServer.defineCommand()`.
*/
readonly commands: NodeJS.ReadOnlyDict<REPLCommand>;
/**
* A value indicating whether the REPL is currently in "editor mode".
*
* @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_commands_and_special_keys
*/
readonly editorMode: boolean;
/**
* A value indicating whether the `_` variable has been assigned.
*
* @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
*/
readonly underscoreAssigned: boolean;
/**
* The last evaluation result from the REPL (assigned to the `_` variable inside of the REPL).
*
* @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
*/
readonly last: any;
/**
* A value indicating whether the `_error` variable has been assigned.
*
* @since v9.8.0
* @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
*/
readonly underscoreErrAssigned: boolean;
/**
* The last error raised inside the REPL (assigned to the `_error` variable inside of the REPL).
*
* @since v9.8.0
* @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
*/
readonly lastError: any;
/**
* Specified in the REPL options, this is the function to be used when evaluating each
* given line of input. If not specified in the REPL options, this is an async wrapper
* for the JavaScript `eval()` function.
*/
readonly eval: REPLEval;
/**
* Specified in the REPL options, this is a value indicating whether the default
* `writer` function should include ANSI color styling to REPL output.
*/
readonly useColors: boolean;
/**
* Specified in the REPL options, this is a value indicating whether the default `eval`
* function will use the JavaScript `global` as the context as opposed to creating a new
* separate context for the REPL instance.
*/
readonly useGlobal: boolean;
/**
* Specified in the REPL options, this is a value indicating whether the default `writer`
* function should output the result of a command if it evaluates to `undefined`.
*/
readonly ignoreUndefined: boolean;
/**
* Specified in the REPL options, this is the function to invoke to format the output of
* each command before writing to `outputStream`. If not specified in the REPL options,
* this will be a wrapper for `util.inspect`.
*/
readonly writer: REPLWriter;
/**
* Specified in the REPL options, this is the function to use for custom Tab auto-completion.
*/
readonly completer: Completer | AsyncCompleter;
/**
* Specified in the REPL options, this is a flag that specifies whether the default `eval`
* function should execute all JavaScript commands in strict mode or default (sloppy) mode.
* Possible values are:
* - `repl.REPL_MODE_SLOPPY` - evaluates expressions in sloppy mode.
* - `repl.REPL_MODE_STRICT` - evaluates expressions in strict mode. This is equivalent to
* prefacing every repl statement with `'use strict'`.
*/
readonly replMode: typeof REPL_MODE_SLOPPY | typeof REPL_MODE_STRICT;
/**
* The `replServer.defineCommand()` method is used to add new `.`\-prefixed commands
* to the REPL instance. Such commands are invoked by typing a `.` followed by the `keyword`. The `cmd` is either a `Function` or an `Object` with the following
* properties:
*
* The following example shows two new commands added to the REPL instance:
*
* ```js
* import repl from 'node:repl';
*
* const replServer = repl.start({ prompt: '> ' });
* replServer.defineCommand('sayhello', {
* help: 'Say hello',
* action(name) {
* this.clearBufferedCommand();
* console.log(`Hello, ${name}!`);
* this.displayPrompt();
* },
* });
* replServer.defineCommand('saybye', function saybye() {
* console.log('Goodbye!');
* this.close();
* });
* ```
*
* The new commands can then be used from within the REPL instance:
*
* ```console
* > .sayhello Node.js User
* Hello, Node.js User!
* > .saybye
* Goodbye!
* ```
* @since v0.3.0
* @param keyword The command keyword (_without_ a leading `.` character).
* @param cmd The function to invoke when the command is processed.
*/
defineCommand(keyword: string, cmd: REPLCommandAction | REPLCommand): void;
/**
* The `replServer.displayPrompt()` method readies the REPL instance for input
* from the user, printing the configured `prompt` to a new line in the `output` and resuming the `input` to accept new input.
*
* When multi-line input is being entered, a pipe `'|'` is printed rather than the
* 'prompt'.
*
* When `preserveCursor` is `true`, the cursor placement will not be reset to `0`.
*
* The `replServer.displayPrompt` method is primarily intended to be called from
* within the action function for commands registered using the `replServer.defineCommand()` method.
* @since v0.1.91
*/
displayPrompt(preserveCursor?: boolean): void;
/**
* The `replServer.clearBufferedCommand()` method clears any command that has been
* buffered but not yet executed. This method is primarily intended to be
* called from within the action function for commands registered using the `replServer.defineCommand()` method.
* @since v9.0.0
*/
clearBufferedCommand(): void;
/**
* Initializes a history log file for the REPL instance. When executing the
* Node.js binary and using the command-line REPL, a history file is initialized
* by default. However, this is not the case when creating a REPL
* programmatically. Use this method to initialize a history log file when working
* with REPL instances programmatically.
* @since v11.10.0
* @param historyPath the path to the history file
* @param callback called when history writes are ready or upon error
*/
setupHistory(historyPath: string, callback: (err: Error | null, repl: this) => void): void;
setupHistory(
historyConfig?: REPLServerSetupHistoryOptions,
callback?: (err: Error | null, repl: this) => void,
): void;
// #region InternalEventEmitter
addListener<E extends keyof REPLServerEventMap>(
eventName: E,
listener: (...args: REPLServerEventMap[E]) => void,
): this;
addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
emit<E extends keyof REPLServerEventMap>(eventName: E, ...args: REPLServerEventMap[E]): boolean;
emit(eventName: string | symbol, ...args: any[]): boolean;
listenerCount<E extends keyof REPLServerEventMap>(
eventName: E,
listener?: (...args: REPLServerEventMap[E]) => void,
): number;
listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
listeners<E extends keyof REPLServerEventMap>(eventName: E): ((...args: REPLServerEventMap[E]) => void)[];
listeners(eventName: string | symbol): ((...args: any[]) => void)[];
off<E extends keyof REPLServerEventMap>(eventName: E, listener: (...args: REPLServerEventMap[E]) => void): this;
off(eventName: string | symbol, listener: (...args: any[]) => void): this;
on<E extends keyof REPLServerEventMap>(eventName: E, listener: (...args: REPLServerEventMap[E]) => void): this;
on(eventName: string | symbol, listener: (...args: any[]) => void): this;
once<E extends keyof REPLServerEventMap>(
eventName: E,
listener: (...args: REPLServerEventMap[E]) => void,
): this;
once(eventName: string | symbol, listener: (...args: any[]) => void): this;
prependListener<E extends keyof REPLServerEventMap>(
eventName: E,
listener: (...args: REPLServerEventMap[E]) => void,
): this;
prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
prependOnceListener<E extends keyof REPLServerEventMap>(
eventName: E,
listener: (...args: REPLServerEventMap[E]) => void,
): this;
prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
rawListeners<E extends keyof REPLServerEventMap>(eventName: E): ((...args: REPLServerEventMap[E]) => void)[];
rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
// eslint-disable-next-line @definitelytyped/no-unnecessary-generics
removeAllListeners<E extends keyof REPLServerEventMap>(eventName?: E): this;
removeAllListeners(eventName?: string | symbol): this;
removeListener<E extends keyof REPLServerEventMap>(
eventName: E,
listener: (...args: REPLServerEventMap[E]) => void,
): this;
removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
// #endregion
}
/**
* A flag passed in the REPL options. Evaluates expressions in sloppy mode.
*/
const REPL_MODE_SLOPPY: unique symbol;
/**
* A flag passed in the REPL options. Evaluates expressions in strict mode.
* This is equivalent to prefacing every repl statement with `'use strict'`.
*/
const REPL_MODE_STRICT: unique symbol;
/**
* The `repl.start()` method creates and starts a {@link REPLServer} instance.
*
* If `options` is a string, then it specifies the input prompt:
*
* ```js
* import repl from 'node:repl';
*
* // a Unix style prompt
* repl.start('$ ');
* ```
* @since v0.1.91
*/
function start(options?: string | ReplOptions): REPLServer;
/**
* Indicates a recoverable error that a `REPLServer` can use to support multi-line input.
*
* @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_recoverable_errors
*/
class Recoverable extends SyntaxError {
err: Error;
constructor(err: Error);
}
}
declare module "repl" {
export * from "node:repl";
}

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/**
* This feature allows the distribution of a Node.js application conveniently to a
* system that does not have Node.js installed.
*
* Node.js supports the creation of [single executable applications](https://github.com/nodejs/single-executable) by allowing
* the injection of a blob prepared by Node.js, which can contain a bundled script,
* into the `node` binary. During start up, the program checks if anything has been
* injected. If the blob is found, it executes the script in the blob. Otherwise
* Node.js operates as it normally does.
*
* The single executable application feature currently only supports running a
* single embedded script using the `CommonJS` module system.
*
* Users can create a single executable application from their bundled script
* with the `node` binary itself and any tool which can inject resources into the
* binary.
*
* Here are the steps for creating a single executable application using one such
* tool, [postject](https://github.com/nodejs/postject):
*
* 1. Create a JavaScript file:
* ```bash
* echo 'console.log(`Hello, ${process.argv[2]}!`);' > hello.js
* ```
* 2. Create a configuration file building a blob that can be injected into the
* single executable application (see `Generating single executable preparation blobs` for details):
* ```bash
* echo '{ "main": "hello.js", "output": "sea-prep.blob" }' > sea-config.json
* ```
* 3. Generate the blob to be injected:
* ```bash
* node --experimental-sea-config sea-config.json
* ```
* 4. Create a copy of the `node` executable and name it according to your needs:
* * On systems other than Windows:
* ```bash
* cp $(command -v node) hello
* ```
* * On Windows:
* ```text
* node -e "require('fs').copyFileSync(process.execPath, 'hello.exe')"
* ```
* The `.exe` extension is necessary.
* 5. Remove the signature of the binary (macOS and Windows only):
* * On macOS:
* ```bash
* codesign --remove-signature hello
* ```
* * On Windows (optional):
* [signtool](https://learn.microsoft.com/en-us/windows/win32/seccrypto/signtool) can be used from the installed [Windows SDK](https://developer.microsoft.com/en-us/windows/downloads/windows-sdk/).
* If this step is
* skipped, ignore any signature-related warning from postject.
* ```powershell
* signtool remove /s hello.exe
* ```
* 6. Inject the blob into the copied binary by running `postject` with
* the following options:
* * `hello` / `hello.exe` \- The name of the copy of the `node` executable
* created in step 4.
* * `NODE_SEA_BLOB` \- The name of the resource / note / section in the binary
* where the contents of the blob will be stored.
* * `sea-prep.blob` \- The name of the blob created in step 1.
* * `--sentinel-fuse NODE_SEA_FUSE_fce680ab2cc467b6e072b8b5df1996b2` \- The [fuse](https://www.electronjs.org/docs/latest/tutorial/fuses) used by the Node.js project to detect if a file has been
* injected.
* * `--macho-segment-name NODE_SEA` (only needed on macOS) - The name of the
* segment in the binary where the contents of the blob will be
* stored.
* To summarize, here is the required command for each platform:
* * On Linux:
* ```bash
* npx postject hello NODE_SEA_BLOB sea-prep.blob \
* --sentinel-fuse NODE_SEA_FUSE_fce680ab2cc467b6e072b8b5df1996b2
* ```
* * On Windows - PowerShell:
* ```powershell
* npx postject hello.exe NODE_SEA_BLOB sea-prep.blob `
* --sentinel-fuse NODE_SEA_FUSE_fce680ab2cc467b6e072b8b5df1996b2
* ```
* * On Windows - Command Prompt:
* ```text
* npx postject hello.exe NODE_SEA_BLOB sea-prep.blob ^
* --sentinel-fuse NODE_SEA_FUSE_fce680ab2cc467b6e072b8b5df1996b2
* ```
* * On macOS:
* ```bash
* npx postject hello NODE_SEA_BLOB sea-prep.blob \
* --sentinel-fuse NODE_SEA_FUSE_fce680ab2cc467b6e072b8b5df1996b2 \
* --macho-segment-name NODE_SEA
* ```
* 7. Sign the binary (macOS and Windows only):
* * On macOS:
* ```bash
* codesign --sign - hello
* ```
* * On Windows (optional):
* A certificate needs to be present for this to work. However, the unsigned
* binary would still be runnable.
* ```powershell
* signtool sign /fd SHA256 hello.exe
* ```
* 8. Run the binary:
* * On systems other than Windows
* ```console
* $ ./hello world
* Hello, world!
* ```
* * On Windows
* ```console
* $ .\hello.exe world
* Hello, world!
* ```
* @since v19.7.0, v18.16.0
* @experimental
* @see [source](https://github.com/nodejs/node/blob/v25.x/src/node_sea.cc)
*/
declare module "node:sea" {
type AssetKey = string;
/**
* @since v20.12.0
* @return Whether this script is running inside a single-executable application.
*/
function isSea(): boolean;
/**
* This method can be used to retrieve the assets configured to be bundled into the
* single-executable application at build time.
* An error is thrown when no matching asset can be found.
* @since v20.12.0
*/
function getAsset(key: AssetKey): ArrayBuffer;
function getAsset(key: AssetKey, encoding: string): string;
/**
* Similar to `sea.getAsset()`, but returns the result in a [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob).
* An error is thrown when no matching asset can be found.
* @since v20.12.0
*/
function getAssetAsBlob(key: AssetKey, options?: {
type: string;
}): Blob;
/**
* This method can be used to retrieve the assets configured to be bundled into the
* single-executable application at build time.
* An error is thrown when no matching asset can be found.
*
* Unlike `sea.getRawAsset()` or `sea.getAssetAsBlob()`, this method does not
* return a copy. Instead, it returns the raw asset bundled inside the executable.
*
* For now, users should avoid writing to the returned array buffer. If the
* injected section is not marked as writable or not aligned properly,
* writes to the returned array buffer is likely to result in a crash.
* @since v20.12.0
*/
function getRawAsset(key: AssetKey): ArrayBuffer;
/**
* This method can be used to retrieve an array of all the keys of assets
* embedded into the single-executable application.
* An error is thrown when not running inside a single-executable application.
* @since v24.8.0
* @returns An array containing all the keys of the assets
* embedded in the executable. If no assets are embedded, returns an empty array.
*/
function getAssetKeys(): string[];
}

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/**
* The utility consumer functions provide common options for consuming
* streams.
* @since v16.7.0
*/
declare module "node:stream/consumers" {
import { Blob, NonSharedBuffer } from "node:buffer";
import { ReadableStream } from "node:stream/web";
/**
* @since v16.7.0
* @returns Fulfills with an `ArrayBuffer` containing the full contents of the stream.
*/
function arrayBuffer(stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>): Promise<ArrayBuffer>;
/**
* @since v16.7.0
* @returns Fulfills with a `Blob` containing the full contents of the stream.
*/
function blob(stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>): Promise<Blob>;
/**
* @since v16.7.0
* @returns Fulfills with a `Buffer` containing the full contents of the stream.
*/
function buffer(stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>): Promise<NonSharedBuffer>;
/**
* @since v16.7.0
* @returns Fulfills with the contents of the stream parsed as a
* UTF-8 encoded string that is then passed through `JSON.parse()`.
*/
function json(stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>): Promise<unknown>;
/**
* @since v16.7.0
* @returns Fulfills with the contents of the stream parsed as a UTF-8 encoded string.
*/
function text(stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>): Promise<string>;
}
declare module "stream/consumers" {
export * from "node:stream/consumers";
}

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declare module "node:stream/promises" {
import { Abortable } from "node:events";
import {
FinishedOptions as _FinishedOptions,
PipelineDestination,
PipelineSource,
PipelineTransform,
} from "node:stream";
import { ReadableStream, WritableStream } from "node:stream/web";
interface FinishedOptions extends _FinishedOptions {
/**
* If true, removes the listeners registered by this function before the promise is fulfilled.
* @default false
*/
cleanup?: boolean | undefined;
}
/**
* ```js
* import { finished } from 'node:stream/promises';
* import { createReadStream } from 'node:fs';
*
* const rs = createReadStream('archive.tar');
*
* async function run() {
* await finished(rs);
* console.log('Stream is done reading.');
* }
*
* run().catch(console.error);
* rs.resume(); // Drain the stream.
* ```
*
* The `finished` API also provides a [callback version](https://nodejs.org/docs/latest-v25.x/api/stream.html#streamfinishedstream-options-callback).
*
* `stream.finished()` leaves dangling event listeners (in particular
* `'error'`, `'end'`, `'finish'` and `'close'`) after the returned promise is
* resolved or rejected. The reason for this is so that unexpected `'error'`
* events (due to incorrect stream implementations) do not cause unexpected
* crashes. If this is unwanted behavior then `options.cleanup` should be set to
* `true`:
*
* ```js
* await finished(rs, { cleanup: true });
* ```
* @since v15.0.0
* @returns Fulfills when the stream is no longer readable or writable.
*/
function finished(
stream: NodeJS.ReadableStream | NodeJS.WritableStream | ReadableStream | WritableStream,
options?: FinishedOptions,
): Promise<void>;
interface PipelineOptions extends Abortable {
end?: boolean | undefined;
}
type PipelineResult<S extends PipelineDestination<any, any>> = S extends (...args: any[]) => PromiseLike<infer R>
? Promise<R>
: Promise<void>;
/**
* ```js
* import { pipeline } from 'node:stream/promises';
* import { createReadStream, createWriteStream } from 'node:fs';
* import { createGzip } from 'node:zlib';
*
* await pipeline(
* createReadStream('archive.tar'),
* createGzip(),
* createWriteStream('archive.tar.gz'),
* );
* console.log('Pipeline succeeded.');
* ```
*
* To use an `AbortSignal`, pass it inside an options object, as the last argument.
* When the signal is aborted, `destroy` will be called on the underlying pipeline,
* with an `AbortError`.
*
* ```js
* import { pipeline } from 'node:stream/promises';
* import { createReadStream, createWriteStream } from 'node:fs';
* import { createGzip } from 'node:zlib';
*
* const ac = new AbortController();
* const { signal } = ac;
* setImmediate(() => ac.abort());
* try {
* await pipeline(
* createReadStream('archive.tar'),
* createGzip(),
* createWriteStream('archive.tar.gz'),
* { signal },
* );
* } catch (err) {
* console.error(err); // AbortError
* }
* ```
*
* The `pipeline` API also supports async generators:
*
* ```js
* import { pipeline } from 'node:stream/promises';
* import { createReadStream, createWriteStream } from 'node:fs';
*
* await pipeline(
* createReadStream('lowercase.txt'),
* async function* (source, { signal }) {
* source.setEncoding('utf8'); // Work with strings rather than `Buffer`s.
* for await (const chunk of source) {
* yield await processChunk(chunk, { signal });
* }
* },
* createWriteStream('uppercase.txt'),
* );
* console.log('Pipeline succeeded.');
* ```
*
* Remember to handle the `signal` argument passed into the async generator.
* Especially in the case where the async generator is the source for the
* pipeline (i.e. first argument) or the pipeline will never complete.
*
* ```js
* import { pipeline } from 'node:stream/promises';
* import fs from 'node:fs';
* await pipeline(
* async function* ({ signal }) {
* await someLongRunningfn({ signal });
* yield 'asd';
* },
* fs.createWriteStream('uppercase.txt'),
* );
* console.log('Pipeline succeeded.');
* ```
*
* The `pipeline` API provides [callback version](https://nodejs.org/docs/latest-v25.x/api/stream.html#streampipelinesource-transforms-destination-callback):
* @since v15.0.0
* @returns Fulfills when the pipeline is complete.
*/
function pipeline<A extends PipelineSource<any>, B extends PipelineDestination<A, any>>(
source: A,
destination: B,
options?: PipelineOptions,
): PipelineResult<B>;
function pipeline<
A extends PipelineSource<any>,
T1 extends PipelineTransform<A, any>,
B extends PipelineDestination<T1, any>,
>(
source: A,
transform1: T1,
destination: B,
options?: PipelineOptions,
): PipelineResult<B>;
function pipeline<
A extends PipelineSource<any>,
T1 extends PipelineTransform<A, any>,
T2 extends PipelineTransform<T1, any>,
B extends PipelineDestination<T2, any>,
>(
source: A,
transform1: T1,
transform2: T2,
destination: B,
options?: PipelineOptions,
): PipelineResult<B>;
function pipeline<
A extends PipelineSource<any>,
T1 extends PipelineTransform<A, any>,
T2 extends PipelineTransform<T1, any>,
T3 extends PipelineTransform<T2, any>,
B extends PipelineDestination<T3, any>,
>(
source: A,
transform1: T1,
transform2: T2,
transform3: T3,
destination: B,
options?: PipelineOptions,
): PipelineResult<B>;
function pipeline<
A extends PipelineSource<any>,
T1 extends PipelineTransform<A, any>,
T2 extends PipelineTransform<T1, any>,
T3 extends PipelineTransform<T2, any>,
T4 extends PipelineTransform<T3, any>,
B extends PipelineDestination<T4, any>,
>(
source: A,
transform1: T1,
transform2: T2,
transform3: T3,
transform4: T4,
destination: B,
options?: PipelineOptions,
): PipelineResult<B>;
function pipeline(
streams: readonly [PipelineSource<any>, ...PipelineTransform<any, any>[], PipelineDestination<any, any>],
options?: PipelineOptions,
): Promise<void>;
function pipeline(
...streams: [PipelineSource<any>, ...PipelineTransform<any, any>[], PipelineDestination<any, any>]
): Promise<void>;
function pipeline(
...streams: [
PipelineSource<any>,
...PipelineTransform<any, any>[],
PipelineDestination<any, any>,
options: PipelineOptions,
]
): Promise<void>;
}
declare module "stream/promises" {
export * from "node:stream/promises";
}

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declare module "node:stream/web" {
import { TextDecoderCommon, TextDecoderOptions, TextEncoderCommon } from "node:util";
type CompressionFormat = "brotli" | "deflate" | "deflate-raw" | "gzip";
type ReadableStreamController<T> = ReadableStreamDefaultController<T> | ReadableByteStreamController;
type ReadableStreamReader<T> = ReadableStreamDefaultReader<T> | ReadableStreamBYOBReader;
type ReadableStreamReaderMode = "byob";
type ReadableStreamReadResult<T> = ReadableStreamReadValueResult<T> | ReadableStreamReadDoneResult<T>;
type ReadableStreamType = "bytes";
interface GenericTransformStream {
readonly readable: ReadableStream;
readonly writable: WritableStream;
}
interface QueuingStrategy<T = any> {
highWaterMark?: number;
size?: QueuingStrategySize<T>;
}
interface QueuingStrategyInit {
highWaterMark: number;
}
interface QueuingStrategySize<T = any> {
(chunk: T): number;
}
interface ReadableStreamBYOBReaderReadOptions {
min?: number;
}
interface ReadableStreamGenericReader {
readonly closed: Promise<void>;
cancel(reason?: any): Promise<void>;
}
interface ReadableStreamGetReaderOptions {
mode?: ReadableStreamReaderMode;
}
interface ReadableStreamIteratorOptions {
preventCancel?: boolean;
}
interface ReadableStreamReadDoneResult<T> {
done: true;
value: T | undefined;
}
interface ReadableStreamReadValueResult<T> {
done: false;
value: T;
}
interface ReadableWritablePair<R = any, W = any> {
readable: ReadableStream<R>;
writable: WritableStream<W>;
}
interface StreamPipeOptions {
preventAbort?: boolean;
preventCancel?: boolean;
preventClose?: boolean;
signal?: AbortSignal;
}
interface Transformer<I = any, O = any> {
flush?: TransformerFlushCallback<O>;
readableType?: undefined;
start?: TransformerStartCallback<O>;
transform?: TransformerTransformCallback<I, O>;
writableType?: undefined;
}
interface TransformerFlushCallback<O> {
(controller: TransformStreamDefaultController<O>): void | PromiseLike<void>;
}
interface TransformerStartCallback<O> {
(controller: TransformStreamDefaultController<O>): any;
}
interface TransformerTransformCallback<I, O> {
(chunk: I, controller: TransformStreamDefaultController<O>): void | PromiseLike<void>;
}
interface UnderlyingByteSource {
autoAllocateChunkSize?: number;
cancel?: UnderlyingSourceCancelCallback;
pull?: (controller: ReadableByteStreamController) => void | PromiseLike<void>;
start?: (controller: ReadableByteStreamController) => any;
type: "bytes";
}
interface UnderlyingDefaultSource<R = any> {
cancel?: UnderlyingSourceCancelCallback;
pull?: (controller: ReadableStreamDefaultController<R>) => void | PromiseLike<void>;
start?: (controller: ReadableStreamDefaultController<R>) => any;
type?: undefined;
}
interface UnderlyingSink<W = any> {
abort?: UnderlyingSinkAbortCallback;
close?: UnderlyingSinkCloseCallback;
start?: UnderlyingSinkStartCallback;
type?: undefined;
write?: UnderlyingSinkWriteCallback<W>;
}
interface UnderlyingSinkAbortCallback {
(reason?: any): void | PromiseLike<void>;
}
interface UnderlyingSinkCloseCallback {
(): void | PromiseLike<void>;
}
interface UnderlyingSinkStartCallback {
(controller: WritableStreamDefaultController): any;
}
interface UnderlyingSinkWriteCallback<W> {
(chunk: W, controller: WritableStreamDefaultController): void | PromiseLike<void>;
}
interface UnderlyingSource<R = any> {
autoAllocateChunkSize?: number;
cancel?: UnderlyingSourceCancelCallback;
pull?: UnderlyingSourcePullCallback<R>;
start?: UnderlyingSourceStartCallback<R>;
type?: ReadableStreamType;
}
interface UnderlyingSourceCancelCallback {
(reason?: any): void | PromiseLike<void>;
}
interface UnderlyingSourcePullCallback<R> {
(controller: ReadableStreamController<R>): void | PromiseLike<void>;
}
interface UnderlyingSourceStartCallback<R> {
(controller: ReadableStreamController<R>): any;
}
interface ByteLengthQueuingStrategy extends QueuingStrategy<NodeJS.ArrayBufferView> {
readonly highWaterMark: number;
readonly size: QueuingStrategySize<NodeJS.ArrayBufferView>;
}
var ByteLengthQueuingStrategy: {
prototype: ByteLengthQueuingStrategy;
new(init: QueuingStrategyInit): ByteLengthQueuingStrategy;
};
interface CompressionStream extends GenericTransformStream {
readonly readable: ReadableStream<NodeJS.NonSharedUint8Array>;
readonly writable: WritableStream<NodeJS.BufferSource>;
}
var CompressionStream: {
prototype: CompressionStream;
new(format: CompressionFormat): CompressionStream;
};
interface CountQueuingStrategy extends QueuingStrategy {
readonly highWaterMark: number;
readonly size: QueuingStrategySize;
}
var CountQueuingStrategy: {
prototype: CountQueuingStrategy;
new(init: QueuingStrategyInit): CountQueuingStrategy;
};
interface DecompressionStream extends GenericTransformStream {
readonly readable: ReadableStream<NodeJS.NonSharedUint8Array>;
readonly writable: WritableStream<NodeJS.BufferSource>;
}
var DecompressionStream: {
prototype: DecompressionStream;
new(format: CompressionFormat): DecompressionStream;
};
interface ReadableByteStreamController {
readonly byobRequest: ReadableStreamBYOBRequest | null;
readonly desiredSize: number | null;
close(): void;
enqueue(chunk: NodeJS.NonSharedArrayBufferView): void;
error(e?: any): void;
}
var ReadableByteStreamController: {
prototype: ReadableByteStreamController;
new(): ReadableByteStreamController;
};
interface ReadableStream<R = any> {
readonly locked: boolean;
cancel(reason?: any): Promise<void>;
getReader(options: { mode: "byob" }): ReadableStreamBYOBReader;
getReader(): ReadableStreamDefaultReader<R>;
getReader(options?: ReadableStreamGetReaderOptions): ReadableStreamReader<R>;
pipeThrough<T>(transform: ReadableWritablePair<T, R>, options?: StreamPipeOptions): ReadableStream<T>;
pipeTo(destination: WritableStream<R>, options?: StreamPipeOptions): Promise<void>;
tee(): [ReadableStream<R>, ReadableStream<R>];
[Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator<R>;
values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator<R>;
}
var ReadableStream: {
prototype: ReadableStream;
new(
underlyingSource: UnderlyingByteSource,
strategy?: { highWaterMark?: number },
): ReadableStream<NodeJS.NonSharedUint8Array>;
new<R = any>(underlyingSource: UnderlyingDefaultSource<R>, strategy?: QueuingStrategy<R>): ReadableStream<R>;
new<R = any>(underlyingSource?: UnderlyingSource<R>, strategy?: QueuingStrategy<R>): ReadableStream<R>;
from<R = any>(iterable: Iterable<R> | AsyncIterable<R>): ReadableStream<R>;
};
interface ReadableStreamAsyncIterator<T> extends NodeJS.AsyncIterator<T, NodeJS.BuiltinIteratorReturn, unknown> {
[Symbol.asyncIterator](): ReadableStreamAsyncIterator<T>;
}
interface ReadableStreamBYOBReader extends ReadableStreamGenericReader {
read<T extends NodeJS.NonSharedArrayBufferView>(
view: T,
options?: ReadableStreamBYOBReaderReadOptions,
): Promise<ReadableStreamReadResult<T>>;
releaseLock(): void;
}
var ReadableStreamBYOBReader: {
prototype: ReadableStreamBYOBReader;
new(stream: ReadableStream<NodeJS.NonSharedUint8Array>): ReadableStreamBYOBReader;
};
interface ReadableStreamBYOBRequest {
readonly view: NodeJS.NonSharedArrayBufferView | null;
respond(bytesWritten: number): void;
respondWithNewView(view: NodeJS.NonSharedArrayBufferView): void;
}
var ReadableStreamBYOBRequest: {
prototype: ReadableStreamBYOBRequest;
new(): ReadableStreamBYOBRequest;
};
interface ReadableStreamDefaultController<R = any> {
readonly desiredSize: number | null;
close(): void;
enqueue(chunk?: R): void;
error(e?: any): void;
}
var ReadableStreamDefaultController: {
prototype: ReadableStreamDefaultController;
new(): ReadableStreamDefaultController;
};
interface ReadableStreamDefaultReader<R = any> extends ReadableStreamGenericReader {
read(): Promise<ReadableStreamReadResult<R>>;
releaseLock(): void;
}
var ReadableStreamDefaultReader: {
prototype: ReadableStreamDefaultReader;
new<R = any>(stream: ReadableStream<R>): ReadableStreamDefaultReader<R>;
};
interface TextDecoderStream extends GenericTransformStream, TextDecoderCommon {
readonly readable: ReadableStream<string>;
readonly writable: WritableStream<NodeJS.BufferSource>;
}
var TextDecoderStream: {
prototype: TextDecoderStream;
new(label?: string, options?: TextDecoderOptions): TextDecoderStream;
};
interface TextEncoderStream extends GenericTransformStream, TextEncoderCommon {
readonly readable: ReadableStream<NodeJS.NonSharedUint8Array>;
readonly writable: WritableStream<string>;
}
var TextEncoderStream: {
prototype: TextEncoderStream;
new(): TextEncoderStream;
};
interface TransformStream<I = any, O = any> {
readonly readable: ReadableStream<O>;
readonly writable: WritableStream<I>;
}
var TransformStream: {
prototype: TransformStream;
new<I = any, O = any>(
transformer?: Transformer<I, O>,
writableStrategy?: QueuingStrategy<I>,
readableStrategy?: QueuingStrategy<O>,
): TransformStream<I, O>;
};
interface TransformStreamDefaultController<O = any> {
readonly desiredSize: number | null;
enqueue(chunk?: O): void;
error(reason?: any): void;
terminate(): void;
}
var TransformStreamDefaultController: {
prototype: TransformStreamDefaultController;
new(): TransformStreamDefaultController;
};
interface WritableStream<W = any> {
readonly locked: boolean;
abort(reason?: any): Promise<void>;
close(): Promise<void>;
getWriter(): WritableStreamDefaultWriter<W>;
}
var WritableStream: {
prototype: WritableStream;
new<W = any>(underlyingSink?: UnderlyingSink<W>, strategy?: QueuingStrategy<W>): WritableStream<W>;
};
interface WritableStreamDefaultController {
readonly signal: AbortSignal;
error(e?: any): void;
}
var WritableStreamDefaultController: {
prototype: WritableStreamDefaultController;
new(): WritableStreamDefaultController;
};
interface WritableStreamDefaultWriter<W = any> {
readonly closed: Promise<void>;
readonly desiredSize: number | null;
readonly ready: Promise<void>;
abort(reason?: any): Promise<void>;
close(): Promise<void>;
releaseLock(): void;
write(chunk?: W): Promise<void>;
}
var WritableStreamDefaultWriter: {
prototype: WritableStreamDefaultWriter;
new<W = any>(stream: WritableStream<W>): WritableStreamDefaultWriter<W>;
};
}
declare module "stream/web" {
export * from "node:stream/web";
}

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/**
* The `node:string_decoder` module provides an API for decoding `Buffer` objects
* into strings in a manner that preserves encoded multi-byte UTF-8 and UTF-16
* characters. It can be accessed using:
*
* ```js
* import { StringDecoder } from 'node:string_decoder';
* ```
*
* The following example shows the basic use of the `StringDecoder` class.
*
* ```js
* import { StringDecoder } from 'node:string_decoder';
* const decoder = new StringDecoder('utf8');
*
* const cent = Buffer.from([0xC2, 0xA2]);
* console.log(decoder.write(cent)); // Prints: ¢
*
* const euro = Buffer.from([0xE2, 0x82, 0xAC]);
* console.log(decoder.write(euro)); // Prints: €
* ```
*
* When a `Buffer` instance is written to the `StringDecoder` instance, an
* internal buffer is used to ensure that the decoded string does not contain
* any incomplete multibyte characters. These are held in the buffer until the
* next call to `stringDecoder.write()` or until `stringDecoder.end()` is called.
*
* In the following example, the three UTF-8 encoded bytes of the European Euro
* symbol (`€`) are written over three separate operations:
*
* ```js
* import { StringDecoder } from 'node:string_decoder';
* const decoder = new StringDecoder('utf8');
*
* decoder.write(Buffer.from([0xE2]));
* decoder.write(Buffer.from([0x82]));
* console.log(decoder.end(Buffer.from([0xAC]))); // Prints: €
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/string_decoder.js)
*/
declare module "node:string_decoder" {
class StringDecoder {
constructor(encoding?: BufferEncoding);
/**
* Returns a decoded string, ensuring that any incomplete multibyte characters at
* the end of the `Buffer`, or `TypedArray`, or `DataView` are omitted from the
* returned string and stored in an internal buffer for the next call to `stringDecoder.write()` or `stringDecoder.end()`.
* @since v0.1.99
* @param buffer The bytes to decode.
*/
write(buffer: string | NodeJS.ArrayBufferView): string;
/**
* Returns any remaining input stored in the internal buffer as a string. Bytes
* representing incomplete UTF-8 and UTF-16 characters will be replaced with
* substitution characters appropriate for the character encoding.
*
* If the `buffer` argument is provided, one final call to `stringDecoder.write()` is performed before returning the remaining input.
* After `end()` is called, the `stringDecoder` object can be reused for new input.
* @since v0.9.3
* @param buffer The bytes to decode.
*/
end(buffer?: string | NodeJS.ArrayBufferView): string;
}
}
declare module "string_decoder" {
export * from "node:string_decoder";
}

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/**
* The `node:test` module supports passing `--test-reporter`
* flags for the test runner to use a specific reporter.
*
* The following built-reporters are supported:
*
* * `spec`
* The `spec` reporter outputs the test results in a human-readable format. This
* is the default reporter.
*
* * `tap`
* The `tap` reporter outputs the test results in the [TAP](https://testanything.org/) format.
*
* * `dot`
* The `dot` reporter outputs the test results in a compact format,
* where each passing test is represented by a `.`,
* and each failing test is represented by a `X`.
*
* * `junit`
* The junit reporter outputs test results in a jUnit XML format
*
* * `lcov`
* The `lcov` reporter outputs test coverage when used with the
* `--experimental-test-coverage` flag.
*
* The exact output of these reporters is subject to change between versions of
* Node.js, and should not be relied on programmatically. If programmatic access
* to the test runner's output is required, use the events emitted by the
* `TestsStream`.
*
* The reporters are available via the `node:test/reporters` module:
*
* ```js
* import { tap, spec, dot, junit, lcov } from 'node:test/reporters';
* ```
* @since v19.9.0, v18.17.0
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/test/reporters.js)
*/
declare module "node:test/reporters" {
import { Transform, TransformOptions } from "node:stream";
import { EventData } from "node:test";
type TestEvent =
| { type: "test:coverage"; data: EventData.TestCoverage }
| { type: "test:complete"; data: EventData.TestComplete }
| { type: "test:dequeue"; data: EventData.TestDequeue }
| { type: "test:diagnostic"; data: EventData.TestDiagnostic }
| { type: "test:enqueue"; data: EventData.TestEnqueue }
| { type: "test:fail"; data: EventData.TestFail }
| { type: "test:pass"; data: EventData.TestPass }
| { type: "test:plan"; data: EventData.TestPlan }
| { type: "test:start"; data: EventData.TestStart }
| { type: "test:stderr"; data: EventData.TestStderr }
| { type: "test:stdout"; data: EventData.TestStdout }
| { type: "test:summary"; data: EventData.TestSummary }
| { type: "test:watch:drained"; data: undefined }
| { type: "test:watch:restarted"; data: undefined };
interface ReporterConstructorWrapper<T extends new(...args: any[]) => Transform> {
new(...args: ConstructorParameters<T>): InstanceType<T>;
(...args: ConstructorParameters<T>): InstanceType<T>;
}
/**
* The `dot` reporter outputs the test results in a compact format,
* where each passing test is represented by a `.`,
* and each failing test is represented by a `X`.
* @since v20.0.0
*/
function dot(source: AsyncIterable<TestEvent>): NodeJS.AsyncIterator<string>;
/**
* The `tap` reporter outputs the test results in the [TAP](https://testanything.org/) format.
* @since v20.0.0
*/
function tap(source: AsyncIterable<TestEvent>): NodeJS.AsyncIterator<string>;
class SpecReporter extends Transform {
constructor();
}
/**
* The `spec` reporter outputs the test results in a human-readable format.
* @since v20.0.0
*/
const spec: ReporterConstructorWrapper<typeof SpecReporter>;
/**
* The `junit` reporter outputs test results in a jUnit XML format.
* @since v21.0.0
*/
function junit(source: AsyncIterable<TestEvent>): NodeJS.AsyncIterator<string>;
class LcovReporter extends Transform {
constructor(options?: Omit<TransformOptions, "writableObjectMode">);
}
/**
* The `lcov` reporter outputs test coverage when used with the
* [`--experimental-test-coverage`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--experimental-test-coverage) flag.
* @since v22.0.0
*/
const lcov: ReporterConstructorWrapper<typeof LcovReporter>;
export { dot, junit, lcov, spec, tap, TestEvent };
}

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/**
* The `timer` module exposes a global API for scheduling functions to
* be called at some future period of time. Because the timer functions are
* globals, there is no need to import `node:timers` to use the API.
*
* The timer functions within Node.js implement a similar API as the timers API
* provided by Web Browsers but use a different internal implementation that is
* built around the Node.js [Event Loop](https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/#setimmediate-vs-settimeout).
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/timers.js)
*/
declare module "node:timers" {
import { Abortable } from "node:events";
import * as promises from "node:timers/promises";
export interface TimerOptions extends Abortable {
/**
* Set to `false` to indicate that the scheduled `Timeout`
* should not require the Node.js event loop to remain active.
* @default true
*/
ref?: boolean | undefined;
}
global {
namespace NodeJS {
/**
* This object is created internally and is returned from `setImmediate()`. It
* can be passed to `clearImmediate()` in order to cancel the scheduled
* actions.
*
* By default, when an immediate is scheduled, the Node.js event loop will continue
* running as long as the immediate is active. The `Immediate` object returned by
* `setImmediate()` exports both `immediate.ref()` and `immediate.unref()`
* functions that can be used to control this default behavior.
*/
interface Immediate extends RefCounted, Disposable {
/**
* If true, the `Immediate` object will keep the Node.js event loop active.
* @since v11.0.0
*/
hasRef(): boolean;
/**
* When called, requests that the Node.js event loop _not_ exit so long as the
* `Immediate` is active. Calling `immediate.ref()` multiple times will have no
* effect.
*
* By default, all `Immediate` objects are "ref'ed", making it normally unnecessary
* to call `immediate.ref()` unless `immediate.unref()` had been called previously.
* @since v9.7.0
* @returns a reference to `immediate`
*/
ref(): this;
/**
* When called, the active `Immediate` object will not require the Node.js event
* loop to remain active. If there is no other activity keeping the event loop
* running, the process may exit before the `Immediate` object's callback is
* invoked. Calling `immediate.unref()` multiple times will have no effect.
* @since v9.7.0
* @returns a reference to `immediate`
*/
unref(): this;
/**
* Cancels the immediate. This is similar to calling `clearImmediate()`.
* @since v20.5.0, v18.18.0
*/
[Symbol.dispose](): void;
_onImmediate(...args: any[]): void;
}
// Legacy interface used in Node.js v9 and prior
// TODO: remove in a future major version bump
/** @deprecated Use `NodeJS.Timeout` instead. */
interface Timer extends RefCounted {
hasRef(): boolean;
refresh(): this;
[Symbol.toPrimitive](): number;
}
/**
* This object is created internally and is returned from `setTimeout()` and
* `setInterval()`. It can be passed to either `clearTimeout()` or
* `clearInterval()` in order to cancel the scheduled actions.
*
* By default, when a timer is scheduled using either `setTimeout()` or
* `setInterval()`, the Node.js event loop will continue running as long as the
* timer is active. Each of the `Timeout` objects returned by these functions
* export both `timeout.ref()` and `timeout.unref()` functions that can be used to
* control this default behavior.
*/
interface Timeout extends RefCounted, Disposable, Timer {
/**
* Cancels the timeout.
* @since v0.9.1
* @legacy Use `clearTimeout()` instead.
* @returns a reference to `timeout`
*/
close(): this;
/**
* If true, the `Timeout` object will keep the Node.js event loop active.
* @since v11.0.0
*/
hasRef(): boolean;
/**
* When called, requests that the Node.js event loop _not_ exit so long as the
* `Timeout` is active. Calling `timeout.ref()` multiple times will have no effect.
*
* By default, all `Timeout` objects are "ref'ed", making it normally unnecessary
* to call `timeout.ref()` unless `timeout.unref()` had been called previously.
* @since v0.9.1
* @returns a reference to `timeout`
*/
ref(): this;
/**
* Sets the timer's start time to the current time, and reschedules the timer to
* call its callback at the previously specified duration adjusted to the current
* time. This is useful for refreshing a timer without allocating a new
* JavaScript object.
*
* Using this on a timer that has already called its callback will reactivate the
* timer.
* @since v10.2.0
* @returns a reference to `timeout`
*/
refresh(): this;
/**
* When called, the active `Timeout` object will not require the Node.js event loop
* to remain active. If there is no other activity keeping the event loop running,
* the process may exit before the `Timeout` object's callback is invoked. Calling
* `timeout.unref()` multiple times will have no effect.
* @since v0.9.1
* @returns a reference to `timeout`
*/
unref(): this;
/**
* Coerce a `Timeout` to a primitive. The primitive can be used to
* clear the `Timeout`. The primitive can only be used in the
* same thread where the timeout was created. Therefore, to use it
* across `worker_threads` it must first be passed to the correct
* thread. This allows enhanced compatibility with browser
* `setTimeout()` and `setInterval()` implementations.
* @since v14.9.0, v12.19.0
*/
[Symbol.toPrimitive](): number;
/**
* Cancels the timeout.
* @since v20.5.0, v18.18.0
*/
[Symbol.dispose](): void;
_onTimeout(...args: any[]): void;
}
}
}
import clearImmediate = globalThis.clearImmediate;
import clearInterval = globalThis.clearInterval;
import clearTimeout = globalThis.clearTimeout;
import setImmediate = globalThis.setImmediate;
import setInterval = globalThis.setInterval;
import setTimeout = globalThis.setTimeout;
export { clearImmediate, clearInterval, clearTimeout, promises, setImmediate, setInterval, setTimeout };
}
declare module "timers" {
export * from "node:timers";
}

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/**
* The `timers/promises` API provides an alternative set of timer functions
* that return `Promise` objects. The API is accessible via
* `require('node:timers/promises')`.
*
* ```js
* import {
* setTimeout,
* setImmediate,
* setInterval,
* } from 'node:timers/promises';
* ```
* @since v15.0.0
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/timers/promises.js)
*/
declare module "node:timers/promises" {
import { TimerOptions } from "node:timers";
/**
* ```js
* import {
* setTimeout,
* } from 'node:timers/promises';
*
* const res = await setTimeout(100, 'result');
*
* console.log(res); // Prints 'result'
* ```
* @since v15.0.0
* @param delay The number of milliseconds to wait before fulfilling the
* promise. **Default:** `1`.
* @param value A value with which the promise is fulfilled.
*/
function setTimeout<T = void>(delay?: number, value?: T, options?: TimerOptions): Promise<T>;
/**
* ```js
* import {
* setImmediate,
* } from 'node:timers/promises';
*
* const res = await setImmediate('result');
*
* console.log(res); // Prints 'result'
* ```
* @since v15.0.0
* @param value A value with which the promise is fulfilled.
*/
function setImmediate<T = void>(value?: T, options?: TimerOptions): Promise<T>;
/**
* Returns an async iterator that generates values in an interval of `delay` ms.
* If `ref` is `true`, you need to call `next()` of async iterator explicitly
* or implicitly to keep the event loop alive.
*
* ```js
* import {
* setInterval,
* } from 'node:timers/promises';
*
* const interval = 100;
* for await (const startTime of setInterval(interval, Date.now())) {
* const now = Date.now();
* console.log(now);
* if ((now - startTime) > 1000)
* break;
* }
* console.log(Date.now());
* ```
* @since v15.9.0
* @param delay The number of milliseconds to wait between iterations.
* **Default:** `1`.
* @param value A value with which the iterator returns.
*/
function setInterval<T = void>(delay?: number, value?: T, options?: TimerOptions): NodeJS.AsyncIterator<T>;
interface Scheduler {
/**
* An experimental API defined by the [Scheduling APIs](https://github.com/WICG/scheduling-apis) draft specification
* being developed as a standard Web Platform API.
*
* Calling `timersPromises.scheduler.wait(delay, options)` is roughly equivalent
* to calling `timersPromises.setTimeout(delay, undefined, options)` except that
* the `ref` option is not supported.
*
* ```js
* import { scheduler } from 'node:timers/promises';
*
* await scheduler.wait(1000); // Wait one second before continuing
* ```
* @since v17.3.0, v16.14.0
* @experimental
* @param delay The number of milliseconds to wait before resolving the
* promise.
*/
wait(delay: number, options?: { signal?: AbortSignal }): Promise<void>;
/**
* An experimental API defined by the [Scheduling APIs](https://github.com/WICG/scheduling-apis) draft specification
* being developed as a standard Web Platform API.
*
* Calling `timersPromises.scheduler.yield()` is equivalent to calling
* `timersPromises.setImmediate()` with no arguments.
* @since v17.3.0, v16.14.0
* @experimental
*/
yield(): Promise<void>;
}
const scheduler: Scheduler;
}
declare module "timers/promises" {
export * from "node:timers/promises";
}

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/**
* The `node:trace_events` module provides a mechanism to centralize tracing information
* generated by V8, Node.js core, and userspace code.
*
* Tracing can be enabled with the `--trace-event-categories` command-line flag
* or by using the `trace_events` module. The `--trace-event-categories` flag
* accepts a list of comma-separated category names.
*
* The available categories are:
*
* * `node`: An empty placeholder.
* * `node.async_hooks`: Enables capture of detailed [`async_hooks`](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html) trace data.
* The [`async_hooks`](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html) events have a unique `asyncId` and a special `triggerId` `triggerAsyncId` property.
* * `node.bootstrap`: Enables capture of Node.js bootstrap milestones.
* * `node.console`: Enables capture of `console.time()` and `console.count()` output.
* * `node.threadpoolwork.sync`: Enables capture of trace data for threadpool synchronous operations, such as `blob`, `zlib`, `crypto` and `node_api`.
* * `node.threadpoolwork.async`: Enables capture of trace data for threadpool asynchronous operations, such as `blob`, `zlib`, `crypto` and `node_api`.
* * `node.dns.native`: Enables capture of trace data for DNS queries.
* * `node.net.native`: Enables capture of trace data for network.
* * `node.environment`: Enables capture of Node.js Environment milestones.
* * `node.fs.sync`: Enables capture of trace data for file system sync methods.
* * `node.fs_dir.sync`: Enables capture of trace data for file system sync directory methods.
* * `node.fs.async`: Enables capture of trace data for file system async methods.
* * `node.fs_dir.async`: Enables capture of trace data for file system async directory methods.
* * `node.perf`: Enables capture of [Performance API](https://nodejs.org/docs/latest-v25.x/api/perf_hooks.html) measurements.
* * `node.perf.usertiming`: Enables capture of only Performance API User Timing
* measures and marks.
* * `node.perf.timerify`: Enables capture of only Performance API timerify
* measurements.
* * `node.promises.rejections`: Enables capture of trace data tracking the number
* of unhandled Promise rejections and handled-after-rejections.
* * `node.vm.script`: Enables capture of trace data for the `node:vm` module's `runInNewContext()`, `runInContext()`, and `runInThisContext()` methods.
* * `v8`: The [V8](https://nodejs.org/docs/latest-v25.x/api/v8.html) events are GC, compiling, and execution related.
* * `node.http`: Enables capture of trace data for http request / response.
*
* By default the `node`, `node.async_hooks`, and `v8` categories are enabled.
*
* ```bash
* node --trace-event-categories v8,node,node.async_hooks server.js
* ```
*
* Prior versions of Node.js required the use of the `--trace-events-enabled` flag to enable trace events. This requirement has been removed. However, the `--trace-events-enabled` flag _may_ still be
* used and will enable the `node`, `node.async_hooks`, and `v8` trace event categories by default.
*
* ```bash
* node --trace-events-enabled
*
* # is equivalent to
*
* node --trace-event-categories v8,node,node.async_hooks
* ```
*
* Alternatively, trace events may be enabled using the `node:trace_events` module:
*
* ```js
* import trace_events from 'node:trace_events';
* const tracing = trace_events.createTracing({ categories: ['node.perf'] });
* tracing.enable(); // Enable trace event capture for the 'node.perf' category
*
* // do work
*
* tracing.disable(); // Disable trace event capture for the 'node.perf' category
* ```
*
* Running Node.js with tracing enabled will produce log files that can be opened
* in the [`chrome://tracing`](https://www.chromium.org/developers/how-tos/trace-event-profiling-tool) tab of Chrome.
*
* The logging file is by default called `node_trace.${rotation}.log`, where `${rotation}` is an incrementing log-rotation id. The filepath pattern can
* be specified with `--trace-event-file-pattern` that accepts a template
* string that supports `${rotation}` and `${pid}`:
*
* ```bash
* node --trace-event-categories v8 --trace-event-file-pattern '${pid}-${rotation}.log' server.js
* ```
*
* To guarantee that the log file is properly generated after signal events like `SIGINT`, `SIGTERM`, or `SIGBREAK`, make sure to have the appropriate handlers
* in your code, such as:
*
* ```js
* process.on('SIGINT', function onSigint() {
* console.info('Received SIGINT.');
* process.exit(130); // Or applicable exit code depending on OS and signal
* });
* ```
*
* The tracing system uses the same time source
* as the one used by `process.hrtime()`.
* However the trace-event timestamps are expressed in microseconds,
* unlike `process.hrtime()` which returns nanoseconds.
*
* The features from this module are not available in [`Worker`](https://nodejs.org/docs/latest-v25.x/api/worker_threads.html#class-worker) threads.
* @experimental
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/trace_events.js)
*/
declare module "node:trace_events" {
/**
* The `Tracing` object is used to enable or disable tracing for sets of
* categories. Instances are created using the
* `trace_events.createTracing()` method.
*
* When created, the `Tracing` object is disabled. Calling the
* `tracing.enable()` method adds the categories to the set of enabled trace
* event categories. Calling `tracing.disable()` will remove the categories
* from the set of enabled trace event categories.
*/
interface Tracing {
/**
* A comma-separated list of the trace event categories covered by this
* `Tracing` object.
* @since v10.0.0
*/
readonly categories: string;
/**
* Disables this `Tracing` object.
*
* Only trace event categories _not_ covered by other enabled `Tracing`
* objects and _not_ specified by the `--trace-event-categories` flag
* will be disabled.
*
* ```js
* import trace_events from 'node:trace_events';
* const t1 = trace_events.createTracing({ categories: ['node', 'v8'] });
* const t2 = trace_events.createTracing({ categories: ['node.perf', 'node'] });
* t1.enable();
* t2.enable();
*
* // Prints 'node,node.perf,v8'
* console.log(trace_events.getEnabledCategories());
*
* t2.disable(); // Will only disable emission of the 'node.perf' category
*
* // Prints 'node,v8'
* console.log(trace_events.getEnabledCategories());
* ```
* @since v10.0.0
*/
disable(): void;
/**
* Enables this `Tracing` object for the set of categories covered by
* the `Tracing` object.
* @since v10.0.0
*/
enable(): void;
/**
* `true` only if the `Tracing` object has been enabled.
* @since v10.0.0
*/
readonly enabled: boolean;
}
interface CreateTracingOptions {
/**
* An array of trace category names. Values included in the array are
* coerced to a string when possible. An error will be thrown if the
* value cannot be coerced.
*/
categories: string[];
}
/**
* Creates and returns a `Tracing` object for the given set of `categories`.
*
* ```js
* import trace_events from 'node:trace_events';
* const categories = ['node.perf', 'node.async_hooks'];
* const tracing = trace_events.createTracing({ categories });
* tracing.enable();
* // do stuff
* tracing.disable();
* ```
* @since v10.0.0
*/
function createTracing(options: CreateTracingOptions): Tracing;
/**
* Returns a comma-separated list of all currently-enabled trace event
* categories. The current set of enabled trace event categories is determined
* by the _union_ of all currently-enabled `Tracing` objects and any categories
* enabled using the `--trace-event-categories` flag.
*
* Given the file `test.js` below, the command `node --trace-event-categories node.perf test.js` will print `'node.async_hooks,node.perf'` to the console.
*
* ```js
* import trace_events from 'node:trace_events';
* const t1 = trace_events.createTracing({ categories: ['node.async_hooks'] });
* const t2 = trace_events.createTracing({ categories: ['node.perf'] });
* const t3 = trace_events.createTracing({ categories: ['v8'] });
*
* t1.enable();
* t2.enable();
*
* console.log(trace_events.getEnabledCategories());
* ```
* @since v10.0.0
*/
function getEnabledCategories(): string | undefined;
}
declare module "trace_events" {
export * from "node:trace_events";
}

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declare module "node:buffer" {
global {
interface BufferConstructor {
// see ../buffer.d.ts for implementation shared with all TypeScript versions
/**
* Allocates a new buffer containing the given {str}.
*
* @param str String to store in buffer.
* @param encoding encoding to use, optional. Default is 'utf8'
* @deprecated since v10.0.0 - Use `Buffer.from(string[, encoding])` instead.
*/
new(str: string, encoding?: BufferEncoding): Buffer;
/**
* Allocates a new buffer of {size} octets.
*
* @param size count of octets to allocate.
* @deprecated since v10.0.0 - Use `Buffer.alloc()` instead (also see `Buffer.allocUnsafe()`).
*/
new(size: number): Buffer;
/**
* Allocates a new buffer containing the given {array} of octets.
*
* @param array The octets to store.
* @deprecated since v10.0.0 - Use `Buffer.from(array)` instead.
*/
new(array: ArrayLike<number>): Buffer;
/**
* Produces a Buffer backed by the same allocated memory as
* the given {ArrayBuffer}/{SharedArrayBuffer}.
*
* @param arrayBuffer The ArrayBuffer with which to share memory.
* @deprecated since v10.0.0 - Use `Buffer.from(arrayBuffer[, byteOffset[, length]])` instead.
*/
new(arrayBuffer: ArrayBufferLike): Buffer;
/**
* Allocates a new `Buffer` using an `array` of bytes in the range `0` – `255`.
* Array entries outside that range will be truncated to fit into it.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* // Creates a new Buffer containing the UTF-8 bytes of the string 'buffer'.
* const buf = Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]);
* ```
*
* If `array` is an `Array`-like object (that is, one with a `length` property of
* type `number`), it is treated as if it is an array, unless it is a `Buffer` or
* a `Uint8Array`. This means all other `TypedArray` variants get treated as an
* `Array`. To create a `Buffer` from the bytes backing a `TypedArray`, use
* `Buffer.copyBytesFrom()`.
*
* A `TypeError` will be thrown if `array` is not an `Array` or another type
* appropriate for `Buffer.from()` variants.
*
* `Buffer.from(array)` and `Buffer.from(string)` may also use the internal
* `Buffer` pool like `Buffer.allocUnsafe()` does.
* @since v5.10.0
*/
from(array: WithImplicitCoercion<ArrayLike<number>>): Buffer;
/**
* This creates a view of the `ArrayBuffer` without copying the underlying
* memory. For example, when passed a reference to the `.buffer` property of a
* `TypedArray` instance, the newly created `Buffer` will share the same
* allocated memory as the `TypedArray`'s underlying `ArrayBuffer`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const arr = new Uint16Array(2);
*
* arr[0] = 5000;
* arr[1] = 4000;
*
* // Shares memory with `arr`.
* const buf = Buffer.from(arr.buffer);
*
* console.log(buf);
* // Prints: <Buffer 88 13 a0 0f>
*
* // Changing the original Uint16Array changes the Buffer also.
* arr[1] = 6000;
*
* console.log(buf);
* // Prints: <Buffer 88 13 70 17>
* ```
*
* The optional `byteOffset` and `length` arguments specify a memory range within
* the `arrayBuffer` that will be shared by the `Buffer`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const ab = new ArrayBuffer(10);
* const buf = Buffer.from(ab, 0, 2);
*
* console.log(buf.length);
* // Prints: 2
* ```
*
* A `TypeError` will be thrown if `arrayBuffer` is not an `ArrayBuffer` or a
* `SharedArrayBuffer` or another type appropriate for `Buffer.from()`
* variants.
*
* It is important to remember that a backing `ArrayBuffer` can cover a range
* of memory that extends beyond the bounds of a `TypedArray` view. A new
* `Buffer` created using the `buffer` property of a `TypedArray` may extend
* beyond the range of the `TypedArray`:
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const arrA = Uint8Array.from([0x63, 0x64, 0x65, 0x66]); // 4 elements
* const arrB = new Uint8Array(arrA.buffer, 1, 2); // 2 elements
* console.log(arrA.buffer === arrB.buffer); // true
*
* const buf = Buffer.from(arrB.buffer);
* console.log(buf);
* // Prints: <Buffer 63 64 65 66>
* ```
* @since v5.10.0
* @param arrayBuffer An `ArrayBuffer`, `SharedArrayBuffer`, for example the
* `.buffer` property of a `TypedArray`.
* @param byteOffset Index of first byte to expose. **Default:** `0`.
* @param length Number of bytes to expose. **Default:**
* `arrayBuffer.byteLength - byteOffset`.
*/
from(
arrayBuffer: WithImplicitCoercion<ArrayBufferLike>,
byteOffset?: number,
length?: number,
): Buffer;
/**
* Creates a new `Buffer` containing `string`. The `encoding` parameter identifies
* the character encoding to be used when converting `string` into bytes.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf1 = Buffer.from('this is a tést');
* const buf2 = Buffer.from('7468697320697320612074c3a97374', 'hex');
*
* console.log(buf1.toString());
* // Prints: this is a tést
* console.log(buf2.toString());
* // Prints: this is a tést
* console.log(buf1.toString('latin1'));
* // Prints: this is a tést
* ```
*
* A `TypeError` will be thrown if `string` is not a string or another type
* appropriate for `Buffer.from()` variants.
*
* `Buffer.from(string)` may also use the internal `Buffer` pool like
* `Buffer.allocUnsafe()` does.
* @since v5.10.0
* @param string A string to encode.
* @param encoding The encoding of `string`. **Default:** `'utf8'`.
*/
from(string: WithImplicitCoercion<string>, encoding?: BufferEncoding): Buffer;
from(arrayOrString: WithImplicitCoercion<ArrayLike<number> | string>): Buffer;
/**
* Creates a new Buffer using the passed {data}
* @param values to create a new Buffer
*/
of(...items: number[]): Buffer;
/**
* Returns a new `Buffer` which is the result of concatenating all the `Buffer` instances in the `list` together.
*
* If the list has no items, or if the `totalLength` is 0, then a new zero-length `Buffer` is returned.
*
* If `totalLength` is not provided, it is calculated from the `Buffer` instances
* in `list` by adding their lengths.
*
* If `totalLength` is provided, it is coerced to an unsigned integer. If the
* combined length of the `Buffer`s in `list` exceeds `totalLength`, the result is
* truncated to `totalLength`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* // Create a single `Buffer` from a list of three `Buffer` instances.
*
* const buf1 = Buffer.alloc(10);
* const buf2 = Buffer.alloc(14);
* const buf3 = Buffer.alloc(18);
* const totalLength = buf1.length + buf2.length + buf3.length;
*
* console.log(totalLength);
* // Prints: 42
*
* const bufA = Buffer.concat([buf1, buf2, buf3], totalLength);
*
* console.log(bufA);
* // Prints: <Buffer 00 00 00 00 ...>
* console.log(bufA.length);
* // Prints: 42
* ```
*
* `Buffer.concat()` may also use the internal `Buffer` pool like `Buffer.allocUnsafe()` does.
* @since v0.7.11
* @param list List of `Buffer` or {@link Uint8Array} instances to concatenate.
* @param totalLength Total length of the `Buffer` instances in `list` when concatenated.
*/
concat(list: readonly Uint8Array[], totalLength?: number): Buffer;
/**
* Copies the underlying memory of `view` into a new `Buffer`.
*
* ```js
* const u16 = new Uint16Array([0, 0xffff]);
* const buf = Buffer.copyBytesFrom(u16, 1, 1);
* u16[1] = 0;
* console.log(buf.length); // 2
* console.log(buf[0]); // 255
* console.log(buf[1]); // 255
* ```
* @since v19.8.0
* @param view The {TypedArray} to copy.
* @param [offset=0] The starting offset within `view`.
* @param [length=view.length - offset] The number of elements from `view` to copy.
*/
copyBytesFrom(view: NodeJS.TypedArray, offset?: number, length?: number): Buffer;
/**
* Allocates a new `Buffer` of `size` bytes. If `fill` is `undefined`, the`Buffer` will be zero-filled.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.alloc(5);
*
* console.log(buf);
* // Prints: <Buffer 00 00 00 00 00>
* ```
*
* If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown.
*
* If `fill` is specified, the allocated `Buffer` will be initialized by calling `buf.fill(fill)`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.alloc(5, 'a');
*
* console.log(buf);
* // Prints: <Buffer 61 61 61 61 61>
* ```
*
* If both `fill` and `encoding` are specified, the allocated `Buffer` will be
* initialized by calling `buf.fill(fill, encoding)`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.alloc(11, 'aGVsbG8gd29ybGQ=', 'base64');
*
* console.log(buf);
* // Prints: <Buffer 68 65 6c 6c 6f 20 77 6f 72 6c 64>
* ```
*
* Calling `Buffer.alloc()` can be measurably slower than the alternative `Buffer.allocUnsafe()` but ensures that the newly created `Buffer` instance
* contents will never contain sensitive data from previous allocations, including
* data that might not have been allocated for `Buffer`s.
*
* A `TypeError` will be thrown if `size` is not a number.
* @since v5.10.0
* @param size The desired length of the new `Buffer`.
* @param [fill=0] A value to pre-fill the new `Buffer` with.
* @param [encoding='utf8'] If `fill` is a string, this is its encoding.
*/
alloc(size: number, fill?: string | Uint8Array | number, encoding?: BufferEncoding): Buffer;
/**
* Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown.
*
* The underlying memory for `Buffer` instances created in this way is _not_
* _initialized_. The contents of the newly created `Buffer` are unknown and _may contain sensitive data_. Use `Buffer.alloc()` instead to initialize`Buffer` instances with zeroes.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.allocUnsafe(10);
*
* console.log(buf);
* // Prints (contents may vary): <Buffer a0 8b 28 3f 01 00 00 00 50 32>
*
* buf.fill(0);
*
* console.log(buf);
* // Prints: <Buffer 00 00 00 00 00 00 00 00 00 00>
* ```
*
* A `TypeError` will be thrown if `size` is not a number.
*
* The `Buffer` module pre-allocates an internal `Buffer` instance of
* size `Buffer.poolSize` that is used as a pool for the fast allocation of new `Buffer` instances created using `Buffer.allocUnsafe()`, `Buffer.from(array)`,
* and `Buffer.concat()` only when `size` is less than `Buffer.poolSize >>> 1` (floor of `Buffer.poolSize` divided by two).
*
* Use of this pre-allocated internal memory pool is a key difference between
* calling `Buffer.alloc(size, fill)` vs. `Buffer.allocUnsafe(size).fill(fill)`.
* Specifically, `Buffer.alloc(size, fill)` will _never_ use the internal `Buffer`pool, while `Buffer.allocUnsafe(size).fill(fill)`_will_ use the internal`Buffer` pool if `size` is less
* than or equal to half `Buffer.poolSize`. The
* difference is subtle but can be important when an application requires the
* additional performance that `Buffer.allocUnsafe()` provides.
* @since v5.10.0
* @param size The desired length of the new `Buffer`.
*/
allocUnsafe(size: number): Buffer;
/**
* Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown. A zero-length `Buffer` is created if
* `size` is 0.
*
* The underlying memory for `Buffer` instances created in this way is _not_
* _initialized_. The contents of the newly created `Buffer` are unknown and _may contain sensitive data_. Use `buf.fill(0)` to initialize
* such `Buffer` instances with zeroes.
*
* When using `Buffer.allocUnsafe()` to allocate new `Buffer` instances,
* allocations under 4 KiB are sliced from a single pre-allocated `Buffer`. This
* allows applications to avoid the garbage collection overhead of creating many
* individually allocated `Buffer` instances. This approach improves both
* performance and memory usage by eliminating the need to track and clean up as
* many individual `ArrayBuffer` objects.
*
* However, in the case where a developer may need to retain a small chunk of
* memory from a pool for an indeterminate amount of time, it may be appropriate
* to create an un-pooled `Buffer` instance using `Buffer.allocUnsafeSlow()` and
* then copying out the relevant bits.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* // Need to keep around a few small chunks of memory.
* const store = [];
*
* socket.on('readable', () => {
* let data;
* while (null !== (data = readable.read())) {
* // Allocate for retained data.
* const sb = Buffer.allocUnsafeSlow(10);
*
* // Copy the data into the new allocation.
* data.copy(sb, 0, 0, 10);
*
* store.push(sb);
* }
* });
* ```
*
* A `TypeError` will be thrown if `size` is not a number.
* @since v5.12.0
* @param size The desired length of the new `Buffer`.
*/
allocUnsafeSlow(size: number): Buffer;
}
interface Buffer extends Uint8Array {
// see ../buffer.d.ts for implementation shared with all TypeScript versions
/**
* Returns a new `Buffer` that references the same memory as the original, but
* offset and cropped by the `start` and `end` indices.
*
* This method is not compatible with the `Uint8Array.prototype.slice()`,
* which is a superclass of `Buffer`. To copy the slice, use`Uint8Array.prototype.slice()`.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.from('buffer');
*
* const copiedBuf = Uint8Array.prototype.slice.call(buf);
* copiedBuf[0]++;
* console.log(copiedBuf.toString());
* // Prints: cuffer
*
* console.log(buf.toString());
* // Prints: buffer
*
* // With buf.slice(), the original buffer is modified.
* const notReallyCopiedBuf = buf.slice();
* notReallyCopiedBuf[0]++;
* console.log(notReallyCopiedBuf.toString());
* // Prints: cuffer
* console.log(buf.toString());
* // Also prints: cuffer (!)
* ```
* @since v0.3.0
* @deprecated Use `subarray` instead.
* @param [start=0] Where the new `Buffer` will start.
* @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
*/
slice(start?: number, end?: number): Buffer;
/**
* Returns a new `Buffer` that references the same memory as the original, but
* offset and cropped by the `start` and `end` indices.
*
* Specifying `end` greater than `buf.length` will return the same result as
* that of `end` equal to `buf.length`.
*
* This method is inherited from [`TypedArray.prototype.subarray()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/subarray).
*
* Modifying the new `Buffer` slice will modify the memory in the original `Buffer`because the allocated memory of the two objects overlap.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* // Create a `Buffer` with the ASCII alphabet, take a slice, and modify one byte
* // from the original `Buffer`.
*
* const buf1 = Buffer.allocUnsafe(26);
*
* for (let i = 0; i < 26; i++) {
* // 97 is the decimal ASCII value for 'a'.
* buf1[i] = i + 97;
* }
*
* const buf2 = buf1.subarray(0, 3);
*
* console.log(buf2.toString('ascii', 0, buf2.length));
* // Prints: abc
*
* buf1[0] = 33;
*
* console.log(buf2.toString('ascii', 0, buf2.length));
* // Prints: !bc
* ```
*
* Specifying negative indexes causes the slice to be generated relative to the
* end of `buf` rather than the beginning.
*
* ```js
* import { Buffer } from 'node:buffer';
*
* const buf = Buffer.from('buffer');
*
* console.log(buf.subarray(-6, -1).toString());
* // Prints: buffe
* // (Equivalent to buf.subarray(0, 5).)
*
* console.log(buf.subarray(-6, -2).toString());
* // Prints: buff
* // (Equivalent to buf.subarray(0, 4).)
*
* console.log(buf.subarray(-5, -2).toString());
* // Prints: uff
* // (Equivalent to buf.subarray(1, 4).)
* ```
* @since v3.0.0
* @param [start=0] Where the new `Buffer` will start.
* @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
*/
subarray(start?: number, end?: number): Buffer;
}
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type NonSharedBuffer = Buffer;
/**
* @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
* TypeScript versions earlier than 5.7.
*/
type AllowSharedBuffer = Buffer;
}
}

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// Interface declaration for Float16Array, required in @types/node v24+.
// These definitions are specific to TS <=5.6.
// This needs all of the "common" properties/methods of the TypedArrays,
// otherwise the type unions `TypedArray` and `ArrayBufferView` will be
// empty objects.
interface Float16Array extends Pick<Float32Array, typeof Symbol.iterator | "entries" | "keys" | "values"> {
readonly BYTES_PER_ELEMENT: number;
readonly buffer: ArrayBufferLike;
readonly byteLength: number;
readonly byteOffset: number;
readonly length: number;
readonly [Symbol.toStringTag]: "Float16Array";
at(index: number): number | undefined;
copyWithin(target: number, start: number, end?: number): this;
every(predicate: (value: number, index: number, array: Float16Array) => unknown, thisArg?: any): boolean;
fill(value: number, start?: number, end?: number): this;
filter(predicate: (value: number, index: number, array: Float16Array) => any, thisArg?: any): Float16Array;
find(predicate: (value: number, index: number, obj: Float16Array) => boolean, thisArg?: any): number | undefined;
findIndex(predicate: (value: number, index: number, obj: Float16Array) => boolean, thisArg?: any): number;
findLast<S extends number>(
predicate: (value: number, index: number, array: Float16Array) => value is S,
thisArg?: any,
): S | undefined;
findLast(
predicate: (value: number, index: number, array: Float16Array) => unknown,
thisArg?: any,
): number | undefined;
findLastIndex(predicate: (value: number, index: number, array: Float16Array) => unknown, thisArg?: any): number;
forEach(callbackfn: (value: number, index: number, array: Float16Array) => void, thisArg?: any): void;
includes(searchElement: number, fromIndex?: number): boolean;
indexOf(searchElement: number, fromIndex?: number): number;
join(separator?: string): string;
lastIndexOf(searchElement: number, fromIndex?: number): number;
map(callbackfn: (value: number, index: number, array: Float16Array) => number, thisArg?: any): Float16Array;
reduce(
callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float16Array) => number,
): number;
reduce(
callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float16Array) => number,
initialValue: number,
): number;
reduce<U>(
callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float16Array) => U,
initialValue: U,
): U;
reduceRight(
callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float16Array) => number,
): number;
reduceRight(
callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float16Array) => number,
initialValue: number,
): number;
reduceRight<U>(
callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float16Array) => U,
initialValue: U,
): U;
reverse(): Float16Array;
set(array: ArrayLike<number>, offset?: number): void;
slice(start?: number, end?: number): Float16Array;
some(predicate: (value: number, index: number, array: Float16Array) => unknown, thisArg?: any): boolean;
sort(compareFn?: (a: number, b: number) => number): this;
subarray(begin?: number, end?: number): Float16Array;
toLocaleString(locales: string | string[], options?: Intl.NumberFormatOptions): string;
toReversed(): Float16Array;
toSorted(compareFn?: (a: number, b: number) => number): Float16Array;
toString(): string;
valueOf(): Float16Array;
with(index: number, value: number): Float16Array;
[index: number]: number;
}

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export {}; // Make this a module
declare global {
namespace NodeJS {
type TypedArray =
| Uint8Array
| Uint8ClampedArray
| Uint16Array
| Uint32Array
| Int8Array
| Int16Array
| Int32Array
| BigUint64Array
| BigInt64Array
| Float16Array
| Float32Array
| Float64Array;
type ArrayBufferView = TypedArray | DataView;
type NonSharedUint8Array = Uint8Array;
type NonSharedUint8ClampedArray = Uint8ClampedArray;
type NonSharedUint16Array = Uint16Array;
type NonSharedUint32Array = Uint32Array;
type NonSharedInt8Array = Int8Array;
type NonSharedInt16Array = Int16Array;
type NonSharedInt32Array = Int32Array;
type NonSharedBigUint64Array = BigUint64Array;
type NonSharedBigInt64Array = BigInt64Array;
type NonSharedFloat16Array = Float16Array;
type NonSharedFloat32Array = Float32Array;
type NonSharedFloat64Array = Float64Array;
type NonSharedDataView = DataView;
type NonSharedTypedArray = TypedArray;
type NonSharedArrayBufferView = ArrayBufferView;
}
}

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/**
* License for programmatically and manually incorporated
* documentation aka. `JSDoc` from https://github.com/nodejs/node/tree/master/doc
*
* Copyright Node.js contributors. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
// NOTE: These definitions support Node.js and TypeScript 5.2 through 5.6.
// Reference required TypeScript libraries:
/// <reference lib="es2020" />
/// <reference lib="esnext.disposable" />
// TypeScript library polyfills required for TypeScript <=5.6:
/// <reference path="./compatibility/float16array.d.ts" />
// Iterator definitions required for compatibility with TypeScript <5.6:
/// <reference path="../compatibility/iterators.d.ts" />
// Definitions for Node.js modules specific to TypeScript <=5.6:
/// <reference path="./globals.typedarray.d.ts" />
/// <reference path="./buffer.buffer.d.ts" />
// Definitions for Node.js modules that are not specific to any version of TypeScript:
/// <reference path="../globals.d.ts" />
/// <reference path="../web-globals/abortcontroller.d.ts" />
/// <reference path="../web-globals/blob.d.ts" />
/// <reference path="../web-globals/console.d.ts" />
/// <reference path="../web-globals/crypto.d.ts" />
/// <reference path="../web-globals/domexception.d.ts" />
/// <reference path="../web-globals/encoding.d.ts" />
/// <reference path="../web-globals/events.d.ts" />
/// <reference path="../web-globals/fetch.d.ts" />
/// <reference path="../web-globals/importmeta.d.ts" />
/// <reference path="../web-globals/messaging.d.ts" />
/// <reference path="../web-globals/navigator.d.ts" />
/// <reference path="../web-globals/performance.d.ts" />
/// <reference path="../web-globals/storage.d.ts" />
/// <reference path="../web-globals/streams.d.ts" />
/// <reference path="../web-globals/timers.d.ts" />
/// <reference path="../web-globals/url.d.ts" />
/// <reference path="../assert.d.ts" />
/// <reference path="../assert/strict.d.ts" />
/// <reference path="../async_hooks.d.ts" />
/// <reference path="../buffer.d.ts" />
/// <reference path="../child_process.d.ts" />
/// <reference path="../cluster.d.ts" />
/// <reference path="../console.d.ts" />
/// <reference path="../constants.d.ts" />
/// <reference path="../crypto.d.ts" />
/// <reference path="../dgram.d.ts" />
/// <reference path="../diagnostics_channel.d.ts" />
/// <reference path="../dns.d.ts" />
/// <reference path="../dns/promises.d.ts" />
/// <reference path="../domain.d.ts" />
/// <reference path="../events.d.ts" />
/// <reference path="../fs.d.ts" />
/// <reference path="../fs/promises.d.ts" />
/// <reference path="../http.d.ts" />
/// <reference path="../http2.d.ts" />
/// <reference path="../https.d.ts" />
/// <reference path="../inspector.d.ts" />
/// <reference path="../inspector.generated.d.ts" />
/// <reference path="../inspector/promises.d.ts" />
/// <reference path="../module.d.ts" />
/// <reference path="../net.d.ts" />
/// <reference path="../os.d.ts" />
/// <reference path="../path.d.ts" />
/// <reference path="../path/posix.d.ts" />
/// <reference path="../path/win32.d.ts" />
/// <reference path="../perf_hooks.d.ts" />
/// <reference path="../process.d.ts" />
/// <reference path="../punycode.d.ts" />
/// <reference path="../querystring.d.ts" />
/// <reference path="../quic.d.ts" />
/// <reference path="../readline.d.ts" />
/// <reference path="../readline/promises.d.ts" />
/// <reference path="../repl.d.ts" />
/// <reference path="../sea.d.ts" />
/// <reference path="../sqlite.d.ts" />
/// <reference path="../stream.d.ts" />
/// <reference path="../stream/consumers.d.ts" />
/// <reference path="../stream/promises.d.ts" />
/// <reference path="../stream/web.d.ts" />
/// <reference path="../string_decoder.d.ts" />
/// <reference path="../test.d.ts" />
/// <reference path="../test/reporters.d.ts" />
/// <reference path="../timers.d.ts" />
/// <reference path="../timers/promises.d.ts" />
/// <reference path="../tls.d.ts" />
/// <reference path="../trace_events.d.ts" />
/// <reference path="../tty.d.ts" />
/// <reference path="../url.d.ts" />
/// <reference path="../util.d.ts" />
/// <reference path="../util/types.d.ts" />
/// <reference path="../v8.d.ts" />
/// <reference path="../vm.d.ts" />
/// <reference path="../wasi.d.ts" />
/// <reference path="../worker_threads.d.ts" />
/// <reference path="../zlib.d.ts" />

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// Interface declaration for Float16Array, required in @types/node v24+.
// These definitions are specific to TS 5.7.
// This needs all of the "common" properties/methods of the TypedArrays,
// otherwise the type unions `TypedArray` and `ArrayBufferView` will be
// empty objects.
interface Float16Array<TArrayBuffer extends ArrayBufferLike = ArrayBufferLike> {
readonly BYTES_PER_ELEMENT: number;
readonly buffer: TArrayBuffer;
readonly byteLength: number;
readonly byteOffset: number;
readonly length: number;
readonly [Symbol.toStringTag]: "Float16Array";
at(index: number): number | undefined;
copyWithin(target: number, start: number, end?: number): this;
entries(): ArrayIterator<[number, number]>;
every(predicate: (value: number, index: number, array: this) => unknown, thisArg?: any): boolean;
fill(value: number, start?: number, end?: number): this;
filter(predicate: (value: number, index: number, array: this) => any, thisArg?: any): Float16Array<ArrayBuffer>;
find(predicate: (value: number, index: number, obj: this) => boolean, thisArg?: any): number | undefined;
findIndex(predicate: (value: number, index: number, obj: this) => boolean, thisArg?: any): number;
findLast<S extends number>(
predicate: (value: number, index: number, array: this) => value is S,
thisArg?: any,
): S | undefined;
findLast(predicate: (value: number, index: number, array: this) => unknown, thisArg?: any): number | undefined;
findLastIndex(predicate: (value: number, index: number, array: this) => unknown, thisArg?: any): number;
forEach(callbackfn: (value: number, index: number, array: this) => void, thisArg?: any): void;
includes(searchElement: number, fromIndex?: number): boolean;
indexOf(searchElement: number, fromIndex?: number): number;
join(separator?: string): string;
keys(): ArrayIterator<number>;
lastIndexOf(searchElement: number, fromIndex?: number): number;
map(callbackfn: (value: number, index: number, array: this) => number, thisArg?: any): Float16Array<ArrayBuffer>;
reduce(
callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: this) => number,
): number;
reduce(
callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: this) => number,
initialValue: number,
): number;
reduce<U>(
callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: this) => U,
initialValue: U,
): U;
reduceRight(
callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: this) => number,
): number;
reduceRight(
callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: this) => number,
initialValue: number,
): number;
reduceRight<U>(
callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: this) => U,
initialValue: U,
): U;
reverse(): this;
set(array: ArrayLike<number>, offset?: number): void;
slice(start?: number, end?: number): Float16Array<ArrayBuffer>;
some(predicate: (value: number, index: number, array: this) => unknown, thisArg?: any): boolean;
sort(compareFn?: (a: number, b: number) => number): this;
subarray(begin?: number, end?: number): Float16Array<TArrayBuffer>;
toLocaleString(locales: string | string[], options?: Intl.NumberFormatOptions): string;
toReversed(): Float16Array<ArrayBuffer>;
toSorted(compareFn?: (a: number, b: number) => number): Float16Array<ArrayBuffer>;
toString(): string;
valueOf(): this;
values(): ArrayIterator<number>;
with(index: number, value: number): Float16Array<ArrayBuffer>;
[Symbol.iterator](): ArrayIterator<number>;
[index: number]: number;
}

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/**
* License for programmatically and manually incorporated
* documentation aka. `JSDoc` from https://github.com/nodejs/node/tree/master/doc
*
* Copyright Node.js contributors. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
// NOTE: These definitions support Node.js and TypeScript 5.7.
// Reference required TypeScript libraries:
/// <reference lib="es2020" />
/// <reference lib="esnext.disposable" />
// TypeScript library polyfills required for TypeScript 5.7:
/// <reference path="./compatibility/float16array.d.ts" />
// Iterator definitions required for compatibility with TypeScript <5.6:
/// <reference path="../compatibility/iterators.d.ts" />
// Definitions for Node.js modules specific to TypeScript 5.7+:
/// <reference path="../globals.typedarray.d.ts" />
/// <reference path="../buffer.buffer.d.ts" />
// Definitions for Node.js modules that are not specific to any version of TypeScript:
/// <reference path="../globals.d.ts" />
/// <reference path="../web-globals/abortcontroller.d.ts" />
/// <reference path="../web-globals/blob.d.ts" />
/// <reference path="../web-globals/console.d.ts" />
/// <reference path="../web-globals/crypto.d.ts" />
/// <reference path="../web-globals/domexception.d.ts" />
/// <reference path="../web-globals/encoding.d.ts" />
/// <reference path="../web-globals/events.d.ts" />
/// <reference path="../web-globals/fetch.d.ts" />
/// <reference path="../web-globals/importmeta.d.ts" />
/// <reference path="../web-globals/messaging.d.ts" />
/// <reference path="../web-globals/navigator.d.ts" />
/// <reference path="../web-globals/performance.d.ts" />
/// <reference path="../web-globals/storage.d.ts" />
/// <reference path="../web-globals/streams.d.ts" />
/// <reference path="../web-globals/timers.d.ts" />
/// <reference path="../web-globals/url.d.ts" />
/// <reference path="../assert.d.ts" />
/// <reference path="../assert/strict.d.ts" />
/// <reference path="../async_hooks.d.ts" />
/// <reference path="../buffer.d.ts" />
/// <reference path="../child_process.d.ts" />
/// <reference path="../cluster.d.ts" />
/// <reference path="../console.d.ts" />
/// <reference path="../constants.d.ts" />
/// <reference path="../crypto.d.ts" />
/// <reference path="../dgram.d.ts" />
/// <reference path="../diagnostics_channel.d.ts" />
/// <reference path="../dns.d.ts" />
/// <reference path="../dns/promises.d.ts" />
/// <reference path="../domain.d.ts" />
/// <reference path="../events.d.ts" />
/// <reference path="../fs.d.ts" />
/// <reference path="../fs/promises.d.ts" />
/// <reference path="../http.d.ts" />
/// <reference path="../http2.d.ts" />
/// <reference path="../https.d.ts" />
/// <reference path="../inspector.d.ts" />
/// <reference path="../inspector.generated.d.ts" />
/// <reference path="../inspector/promises.d.ts" />
/// <reference path="../module.d.ts" />
/// <reference path="../net.d.ts" />
/// <reference path="../os.d.ts" />
/// <reference path="../path.d.ts" />
/// <reference path="../path/posix.d.ts" />
/// <reference path="../path/win32.d.ts" />
/// <reference path="../perf_hooks.d.ts" />
/// <reference path="../process.d.ts" />
/// <reference path="../punycode.d.ts" />
/// <reference path="../querystring.d.ts" />
/// <reference path="../quic.d.ts" />
/// <reference path="../readline.d.ts" />
/// <reference path="../readline/promises.d.ts" />
/// <reference path="../repl.d.ts" />
/// <reference path="../sea.d.ts" />
/// <reference path="../sqlite.d.ts" />
/// <reference path="../stream.d.ts" />
/// <reference path="../stream/consumers.d.ts" />
/// <reference path="../stream/promises.d.ts" />
/// <reference path="../stream/web.d.ts" />
/// <reference path="../string_decoder.d.ts" />
/// <reference path="../test.d.ts" />
/// <reference path="../test/reporters.d.ts" />
/// <reference path="../timers.d.ts" />
/// <reference path="../timers/promises.d.ts" />
/// <reference path="../tls.d.ts" />
/// <reference path="../trace_events.d.ts" />
/// <reference path="../tty.d.ts" />
/// <reference path="../url.d.ts" />
/// <reference path="../util.d.ts" />
/// <reference path="../util/types.d.ts" />
/// <reference path="../v8.d.ts" />
/// <reference path="../vm.d.ts" />
/// <reference path="../wasi.d.ts" />
/// <reference path="../worker_threads.d.ts" />
/// <reference path="../zlib.d.ts" />

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/**
* The `node:tty` module provides the `tty.ReadStream` and `tty.WriteStream` classes. In most cases, it will not be necessary or possible to use this module
* directly. However, it can be accessed using:
*
* ```js
* import tty from 'node:tty';
* ```
*
* When Node.js detects that it is being run with a text terminal ("TTY")
* attached, `process.stdin` will, by default, be initialized as an instance of `tty.ReadStream` and both `process.stdout` and `process.stderr` will, by
* default, be instances of `tty.WriteStream`. The preferred method of determining
* whether Node.js is being run within a TTY context is to check that the value of
* the `process.stdout.isTTY` property is `true`:
*
* ```console
* $ node -p -e "Boolean(process.stdout.isTTY)"
* true
* $ node -p -e "Boolean(process.stdout.isTTY)" | cat
* false
* ```
*
* In most cases, there should be little to no reason for an application to
* manually create instances of the `tty.ReadStream` and `tty.WriteStream` classes.
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/tty.js)
*/
declare module "node:tty" {
import * as net from "node:net";
/**
* The `tty.isatty()` method returns `true` if the given `fd` is associated with
* a TTY and `false` if it is not, including whenever `fd` is not a non-negative
* integer.
* @since v0.5.8
* @param fd A numeric file descriptor
*/
function isatty(fd: number): boolean;
/**
* Represents the readable side of a TTY. In normal circumstances `process.stdin` will be the only `tty.ReadStream` instance in a Node.js
* process and there should be no reason to create additional instances.
* @since v0.5.8
*/
class ReadStream extends net.Socket {
constructor(fd: number, options?: net.SocketConstructorOpts);
/**
* A `boolean` that is `true` if the TTY is currently configured to operate as a
* raw device.
*
* This flag is always `false` when a process starts, even if the terminal is
* operating in raw mode. Its value will change with subsequent calls to `setRawMode`.
* @since v0.7.7
*/
isRaw: boolean;
/**
* Allows configuration of `tty.ReadStream` so that it operates as a raw device.
*
* When in raw mode, input is always available character-by-character, not
* including modifiers. Additionally, all special processing of characters by the
* terminal is disabled, including echoing input
* characters. Ctrl+C will no longer cause a `SIGINT` when
* in this mode.
* @since v0.7.7
* @param mode If `true`, configures the `tty.ReadStream` to operate as a raw device. If `false`, configures the `tty.ReadStream` to operate in its default mode. The `readStream.isRaw`
* property will be set to the resulting mode.
* @return The read stream instance.
*/
setRawMode(mode: boolean): this;
/**
* A `boolean` that is always `true` for `tty.ReadStream` instances.
* @since v0.5.8
*/
isTTY: boolean;
}
/**
* -1 - to the left from cursor
* 0 - the entire line
* 1 - to the right from cursor
*/
type Direction = -1 | 0 | 1;
interface WriteStreamEventMap extends net.SocketEventMap {
"resize": [];
}
/**
* Represents the writable side of a TTY. In normal circumstances, `process.stdout` and `process.stderr` will be the only`tty.WriteStream` instances created for a Node.js process and there
* should be no reason to create additional instances.
* @since v0.5.8
*/
class WriteStream extends net.Socket {
constructor(fd: number);
/**
* `writeStream.clearLine()` clears the current line of this `WriteStream` in a
* direction identified by `dir`.
* @since v0.7.7
* @param callback Invoked once the operation completes.
* @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
*/
clearLine(dir: Direction, callback?: () => void): boolean;
/**
* `writeStream.clearScreenDown()` clears this `WriteStream` from the current
* cursor down.
* @since v0.7.7
* @param callback Invoked once the operation completes.
* @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
*/
clearScreenDown(callback?: () => void): boolean;
/**
* `writeStream.cursorTo()` moves this `WriteStream`'s cursor to the specified
* position.
* @since v0.7.7
* @param callback Invoked once the operation completes.
* @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
*/
cursorTo(x: number, y?: number, callback?: () => void): boolean;
cursorTo(x: number, callback: () => void): boolean;
/**
* `writeStream.moveCursor()` moves this `WriteStream`'s cursor _relative_ to its
* current position.
* @since v0.7.7
* @param callback Invoked once the operation completes.
* @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
*/
moveCursor(dx: number, dy: number, callback?: () => void): boolean;
/**
* Returns:
*
* * `1` for 2,
* * `4` for 16,
* * `8` for 256,
* * `24` for 16,777,216 colors supported.
*
* Use this to determine what colors the terminal supports. Due to the nature of
* colors in terminals it is possible to either have false positives or false
* negatives. It depends on process information and the environment variables that
* may lie about what terminal is used.
* It is possible to pass in an `env` object to simulate the usage of a specific
* terminal. This can be useful to check how specific environment settings behave.
*
* To enforce a specific color support, use one of the below environment settings.
*
* * 2 colors: `FORCE_COLOR = 0` (Disables colors)
* * 16 colors: `FORCE_COLOR = 1`
* * 256 colors: `FORCE_COLOR = 2`
* * 16,777,216 colors: `FORCE_COLOR = 3`
*
* Disabling color support is also possible by using the `NO_COLOR` and `NODE_DISABLE_COLORS` environment variables.
* @since v9.9.0
* @param [env=process.env] An object containing the environment variables to check. This enables simulating the usage of a specific terminal.
*/
getColorDepth(env?: object): number;
/**
* Returns `true` if the `writeStream` supports at least as many colors as provided
* in `count`. Minimum support is 2 (black and white).
*
* This has the same false positives and negatives as described in `writeStream.getColorDepth()`.
*
* ```js
* process.stdout.hasColors();
* // Returns true or false depending on if `stdout` supports at least 16 colors.
* process.stdout.hasColors(256);
* // Returns true or false depending on if `stdout` supports at least 256 colors.
* process.stdout.hasColors({ TMUX: '1' });
* // Returns true.
* process.stdout.hasColors(2 ** 24, { TMUX: '1' });
* // Returns false (the environment setting pretends to support 2 ** 8 colors).
* ```
* @since v11.13.0, v10.16.0
* @param [count=16] The number of colors that are requested (minimum 2).
* @param [env=process.env] An object containing the environment variables to check. This enables simulating the usage of a specific terminal.
*/
hasColors(count?: number): boolean;
hasColors(env?: object): boolean;
hasColors(count: number, env?: object): boolean;
/**
* `writeStream.getWindowSize()` returns the size of the TTY
* corresponding to this `WriteStream`. The array is of the type `[numColumns, numRows]` where `numColumns` and `numRows` represent the number
* of columns and rows in the corresponding TTY.
* @since v0.7.7
*/
getWindowSize(): [number, number];
/**
* A `number` specifying the number of columns the TTY currently has. This property
* is updated whenever the `'resize'` event is emitted.
* @since v0.7.7
*/
columns: number;
/**
* A `number` specifying the number of rows the TTY currently has. This property
* is updated whenever the `'resize'` event is emitted.
* @since v0.7.7
*/
rows: number;
/**
* A `boolean` that is always `true`.
* @since v0.5.8
*/
isTTY: boolean;
// #region InternalEventEmitter
addListener<E extends keyof WriteStreamEventMap>(
eventName: E,
listener: (...args: WriteStreamEventMap[E]) => void,
): this;
addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
emit<E extends keyof WriteStreamEventMap>(eventName: E, ...args: WriteStreamEventMap[E]): boolean;
emit(eventName: string | symbol, ...args: any[]): boolean;
listenerCount<E extends keyof WriteStreamEventMap>(
eventName: E,
listener?: (...args: WriteStreamEventMap[E]) => void,
): number;
listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
listeners<E extends keyof WriteStreamEventMap>(eventName: E): ((...args: WriteStreamEventMap[E]) => void)[];
listeners(eventName: string | symbol): ((...args: any[]) => void)[];
off<E extends keyof WriteStreamEventMap>(
eventName: E,
listener: (...args: WriteStreamEventMap[E]) => void,
): this;
off(eventName: string | symbol, listener: (...args: any[]) => void): this;
on<E extends keyof WriteStreamEventMap>(
eventName: E,
listener: (...args: WriteStreamEventMap[E]) => void,
): this;
on(eventName: string | symbol, listener: (...args: any[]) => void): this;
once<E extends keyof WriteStreamEventMap>(
eventName: E,
listener: (...args: WriteStreamEventMap[E]) => void,
): this;
once(eventName: string | symbol, listener: (...args: any[]) => void): this;
prependListener<E extends keyof WriteStreamEventMap>(
eventName: E,
listener: (...args: WriteStreamEventMap[E]) => void,
): this;
prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
prependOnceListener<E extends keyof WriteStreamEventMap>(
eventName: E,
listener: (...args: WriteStreamEventMap[E]) => void,
): this;
prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
rawListeners<E extends keyof WriteStreamEventMap>(eventName: E): ((...args: WriteStreamEventMap[E]) => void)[];
rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
// eslint-disable-next-line @definitelytyped/no-unnecessary-generics
removeAllListeners<E extends keyof WriteStreamEventMap>(eventName?: E): this;
removeAllListeners(eventName?: string | symbol): this;
removeListener<E extends keyof WriteStreamEventMap>(
eventName: E,
listener: (...args: WriteStreamEventMap[E]) => void,
): this;
removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
// #endregion
}
}
declare module "tty" {
export * from "node:tty";
}

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/**
* The `node:url` module provides utilities for URL resolution and parsing. It can
* be accessed using:
*
* ```js
* import url from 'node:url';
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/url.js)
*/
declare module "node:url" {
import { Blob, NonSharedBuffer } from "node:buffer";
import { ClientRequestArgs } from "node:http";
import { ParsedUrlQuery, ParsedUrlQueryInput } from "node:querystring";
// Input to `url.format`
interface UrlObject {
auth?: string | null | undefined;
hash?: string | null | undefined;
host?: string | null | undefined;
hostname?: string | null | undefined;
href?: string | null | undefined;
pathname?: string | null | undefined;
protocol?: string | null | undefined;
search?: string | null | undefined;
slashes?: boolean | null | undefined;
port?: string | number | null | undefined;
query?: string | null | ParsedUrlQueryInput | undefined;
}
// Output of `url.parse`
interface Url {
auth: string | null;
hash: string | null;
host: string | null;
hostname: string | null;
href: string;
path: string | null;
pathname: string | null;
protocol: string | null;
search: string | null;
slashes: boolean | null;
port: string | null;
query: string | null | ParsedUrlQuery;
}
interface UrlWithParsedQuery extends Url {
query: ParsedUrlQuery;
}
interface UrlWithStringQuery extends Url {
query: string | null;
}
interface FileUrlToPathOptions {
/**
* `true` if the `path` should be return as a windows filepath, `false` for posix, and `undefined` for the system default.
* @default undefined
* @since v22.1.0
*/
windows?: boolean | undefined;
}
interface PathToFileUrlOptions {
/**
* `true` if the `path` should be return as a windows filepath, `false` for posix, and `undefined` for the system default.
* @default undefined
* @since v22.1.0
*/
windows?: boolean | undefined;
}
/**
* The `url.parse()` method takes a URL string, parses it, and returns a URL
* object.
*
* A `TypeError` is thrown if `urlString` is not a string.
*
* A `URIError` is thrown if the `auth` property is present but cannot be decoded.
*
* `url.parse()` uses a lenient, non-standard algorithm for parsing URL
* strings. It is prone to security issues such as [host name spoofing](https://hackerone.com/reports/678487)
* and incorrect handling of usernames and passwords. Do not use with untrusted
* input. CVEs are not issued for `url.parse()` vulnerabilities. Use the
* [WHATWG URL](https://nodejs.org/docs/latest-v25.x/api/url.html#the-whatwg-url-api) API instead, for example:
*
* ```js
* function getURL(req) {
* const proto = req.headers['x-forwarded-proto'] || 'https';
* const host = req.headers['x-forwarded-host'] || req.headers.host || 'example.com';
* return new URL(req.url || '/', `${proto}://${host}`);
* }
* ```
*
* The example above assumes well-formed headers are forwarded from a reverse
* proxy to your Node.js server. If you are not using a reverse proxy, you should
* use the example below:
*
* ```js
* function getURL(req) {
* return new URL(req.url || '/', 'https://example.com');
* }
* ```
* @since v0.1.25
* @deprecated Use the WHATWG URL API instead.
* @param urlString The URL string to parse.
* @param parseQueryString If `true`, the `query` property will always
* be set to an object returned by the [`querystring`](https://nodejs.org/docs/latest-v25.x/api/querystring.html) module's `parse()`
* method. If `false`, the `query` property on the returned URL object will be an
* unparsed, undecoded string. **Default:** `false`.
* @param slashesDenoteHost If `true`, the first token after the literal
* string `//` and preceding the next `/` will be interpreted as the `host`.
* For instance, given `//foo/bar`, the result would be
* `{host: 'foo', pathname: '/bar'}` rather than `{pathname: '//foo/bar'}`.
* **Default:** `false`.
*/
function parse(
urlString: string,
parseQueryString?: false,
slashesDenoteHost?: boolean,
): UrlWithStringQuery;
function parse(urlString: string, parseQueryString: true, slashesDenoteHost?: boolean): UrlWithParsedQuery;
function parse(urlString: string, parseQueryString: boolean, slashesDenoteHost?: boolean): Url;
/**
* The `url.format()` method returns a formatted URL string derived from `urlObject`.
*
* ```js
* import url from 'node:url';
* url.format({
* protocol: 'https',
* hostname: 'example.com',
* pathname: '/some/path',
* query: {
* page: 1,
* format: 'json',
* },
* });
*
* // => 'https://example.com/some/path?page=1&#x26;format=json'
* ```
*
* If `urlObject` is not an object or a string, `url.format()` will throw a `TypeError`.
*
* The formatting process operates as follows:
*
* * A new empty string `result` is created.
* * If `urlObject.protocol` is a string, it is appended as-is to `result`.
* * Otherwise, if `urlObject.protocol` is not `undefined` and is not a string, an `Error` is thrown.
* * For all string values of `urlObject.protocol` that _do not end_ with an ASCII
* colon (`:`) character, the literal string `:` will be appended to `result`.
* * If either of the following conditions is true, then the literal string `//` will be appended to `result`:
* * `urlObject.slashes` property is true;
* * `urlObject.protocol` begins with `http`, `https`, `ftp`, `gopher`, or `file`;
* * If the value of the `urlObject.auth` property is truthy, and either `urlObject.host` or `urlObject.hostname` are not `undefined`, the value of `urlObject.auth` will be coerced into a string
* and appended to `result` followed by the literal string `@`.
* * If the `urlObject.host` property is `undefined` then:
* * If the `urlObject.hostname` is a string, it is appended to `result`.
* * Otherwise, if `urlObject.hostname` is not `undefined` and is not a string,
* an `Error` is thrown.
* * If the `urlObject.port` property value is truthy, and `urlObject.hostname` is not `undefined`:
* * The literal string `:` is appended to `result`, and
* * The value of `urlObject.port` is coerced to a string and appended to `result`.
* * Otherwise, if the `urlObject.host` property value is truthy, the value of `urlObject.host` is coerced to a string and appended to `result`.
* * If the `urlObject.pathname` property is a string that is not an empty string:
* * If the `urlObject.pathname` _does not start_ with an ASCII forward slash
* (`/`), then the literal string `'/'` is appended to `result`.
* * The value of `urlObject.pathname` is appended to `result`.
* * Otherwise, if `urlObject.pathname` is not `undefined` and is not a string, an `Error` is thrown.
* * If the `urlObject.search` property is `undefined` and if the `urlObject.query`property is an `Object`, the literal string `?` is appended to `result` followed by the output of calling the
* `querystring` module's `stringify()` method passing the value of `urlObject.query`.
* * Otherwise, if `urlObject.search` is a string:
* * If the value of `urlObject.search` _does not start_ with the ASCII question
* mark (`?`) character, the literal string `?` is appended to `result`.
* * The value of `urlObject.search` is appended to `result`.
* * Otherwise, if `urlObject.search` is not `undefined` and is not a string, an `Error` is thrown.
* * If the `urlObject.hash` property is a string:
* * If the value of `urlObject.hash` _does not start_ with the ASCII hash (`#`)
* character, the literal string `#` is appended to `result`.
* * The value of `urlObject.hash` is appended to `result`.
* * Otherwise, if the `urlObject.hash` property is not `undefined` and is not a
* string, an `Error` is thrown.
* * `result` is returned.
* @since v0.1.25
* @legacy Use the WHATWG URL API instead.
* @param urlObject A URL object (as returned by `url.parse()` or constructed otherwise). If a string, it is converted to an object by passing it to `url.parse()`.
*/
function format(urlObject: URL, options?: URLFormatOptions): string;
/**
* The `url.format()` method returns a formatted URL string derived from `urlObject`.
*
* ```js
* import url from 'node:url';
* url.format({
* protocol: 'https',
* hostname: 'example.com',
* pathname: '/some/path',
* query: {
* page: 1,
* format: 'json',
* },
* });
*
* // => 'https://example.com/some/path?page=1&#x26;format=json'
* ```
*
* If `urlObject` is not an object or a string, `url.format()` will throw a `TypeError`.
*
* The formatting process operates as follows:
*
* * A new empty string `result` is created.
* * If `urlObject.protocol` is a string, it is appended as-is to `result`.
* * Otherwise, if `urlObject.protocol` is not `undefined` and is not a string, an `Error` is thrown.
* * For all string values of `urlObject.protocol` that _do not end_ with an ASCII
* colon (`:`) character, the literal string `:` will be appended to `result`.
* * If either of the following conditions is true, then the literal string `//` will be appended to `result`:
* * `urlObject.slashes` property is true;
* * `urlObject.protocol` begins with `http`, `https`, `ftp`, `gopher`, or `file`;
* * If the value of the `urlObject.auth` property is truthy, and either `urlObject.host` or `urlObject.hostname` are not `undefined`, the value of `urlObject.auth` will be coerced into a string
* and appended to `result` followed by the literal string `@`.
* * If the `urlObject.host` property is `undefined` then:
* * If the `urlObject.hostname` is a string, it is appended to `result`.
* * Otherwise, if `urlObject.hostname` is not `undefined` and is not a string,
* an `Error` is thrown.
* * If the `urlObject.port` property value is truthy, and `urlObject.hostname` is not `undefined`:
* * The literal string `:` is appended to `result`, and
* * The value of `urlObject.port` is coerced to a string and appended to `result`.
* * Otherwise, if the `urlObject.host` property value is truthy, the value of `urlObject.host` is coerced to a string and appended to `result`.
* * If the `urlObject.pathname` property is a string that is not an empty string:
* * If the `urlObject.pathname` _does not start_ with an ASCII forward slash
* (`/`), then the literal string `'/'` is appended to `result`.
* * The value of `urlObject.pathname` is appended to `result`.
* * Otherwise, if `urlObject.pathname` is not `undefined` and is not a string, an `Error` is thrown.
* * If the `urlObject.search` property is `undefined` and if the `urlObject.query`property is an `Object`, the literal string `?` is appended to `result` followed by the output of calling the
* `querystring` module's `stringify()` method passing the value of `urlObject.query`.
* * Otherwise, if `urlObject.search` is a string:
* * If the value of `urlObject.search` _does not start_ with the ASCII question
* mark (`?`) character, the literal string `?` is appended to `result`.
* * The value of `urlObject.search` is appended to `result`.
* * Otherwise, if `urlObject.search` is not `undefined` and is not a string, an `Error` is thrown.
* * If the `urlObject.hash` property is a string:
* * If the value of `urlObject.hash` _does not start_ with the ASCII hash (`#`)
* character, the literal string `#` is appended to `result`.
* * The value of `urlObject.hash` is appended to `result`.
* * Otherwise, if the `urlObject.hash` property is not `undefined` and is not a
* string, an `Error` is thrown.
* * `result` is returned.
* @since v0.1.25
* @legacy Use the WHATWG URL API instead.
* @param urlObject A URL object (as returned by `url.parse()` or constructed otherwise). If a string, it is converted to an object by passing it to `url.parse()`.
*/
function format(urlObject: UrlObject | string): string;
/**
* The `url.resolve()` method resolves a target URL relative to a base URL in a
* manner similar to that of a web browser resolving an anchor tag.
*
* ```js
* import url from 'node:url';
* url.resolve('/one/two/three', 'four'); // '/one/two/four'
* url.resolve('http://example.com/', '/one'); // 'http://example.com/one'
* url.resolve('http://example.com/one', '/two'); // 'http://example.com/two'
* ```
*
* To achieve the same result using the WHATWG URL API:
*
* ```js
* function resolve(from, to) {
* const resolvedUrl = new URL(to, new URL(from, 'resolve://'));
* if (resolvedUrl.protocol === 'resolve:') {
* // `from` is a relative URL.
* const { pathname, search, hash } = resolvedUrl;
* return pathname + search + hash;
* }
* return resolvedUrl.toString();
* }
*
* resolve('/one/two/three', 'four'); // '/one/two/four'
* resolve('http://example.com/', '/one'); // 'http://example.com/one'
* resolve('http://example.com/one', '/two'); // 'http://example.com/two'
* ```
* @since v0.1.25
* @legacy Use the WHATWG URL API instead.
* @param from The base URL to use if `to` is a relative URL.
* @param to The target URL to resolve.
*/
function resolve(from: string, to: string): string;
/**
* Returns the [Punycode](https://tools.ietf.org/html/rfc5891#section-4.4) ASCII serialization of the `domain`. If `domain` is an
* invalid domain, the empty string is returned.
*
* It performs the inverse operation to {@link domainToUnicode}.
*
* ```js
* import url from 'node:url';
*
* console.log(url.domainToASCII('español.com'));
* // Prints xn--espaol-zwa.com
* console.log(url.domainToASCII('中文.com'));
* // Prints xn--fiq228c.com
* console.log(url.domainToASCII('xn--iñvalid.com'));
* // Prints an empty string
* ```
* @since v7.4.0, v6.13.0
*/
function domainToASCII(domain: string): string;
/**
* Returns the Unicode serialization of the `domain`. If `domain` is an invalid
* domain, the empty string is returned.
*
* It performs the inverse operation to {@link domainToASCII}.
*
* ```js
* import url from 'node:url';
*
* console.log(url.domainToUnicode('xn--espaol-zwa.com'));
* // Prints español.com
* console.log(url.domainToUnicode('xn--fiq228c.com'));
* // Prints 中文.com
* console.log(url.domainToUnicode('xn--iñvalid.com'));
* // Prints an empty string
* ```
* @since v7.4.0, v6.13.0
*/
function domainToUnicode(domain: string): string;
/**
* This function ensures the correct decodings of percent-encoded characters as
* well as ensuring a cross-platform valid absolute path string.
*
* ```js
* import { fileURLToPath } from 'node:url';
*
* const __filename = fileURLToPath(import.meta.url);
*
* new URL('file:///C:/path/').pathname; // Incorrect: /C:/path/
* fileURLToPath('file:///C:/path/'); // Correct: C:\path\ (Windows)
*
* new URL('file://nas/foo.txt').pathname; // Incorrect: /foo.txt
* fileURLToPath('file://nas/foo.txt'); // Correct: \\nas\foo.txt (Windows)
*
* new URL('file:///你好.txt').pathname; // Incorrect: /%E4%BD%A0%E5%A5%BD.txt
* fileURLToPath('file:///你好.txt'); // Correct: /你好.txt (POSIX)
*
* new URL('file:///hello world').pathname; // Incorrect: /hello%20world
* fileURLToPath('file:///hello world'); // Correct: /hello world (POSIX)
* ```
*
* **Security Considerations:**
*
* This function decodes percent-encoded characters, including encoded dot-segments
* (`%2e` as `.` and `%2e%2e` as `..`), and then normalizes the resulting path.
* This means that encoded directory traversal sequences (such as `%2e%2e`) are
* decoded and processed as actual path traversal, even though encoded slashes
* (`%2F`, `%5C`) are correctly rejected.
*
* **Applications must not rely on `fileURLToPath()` alone to prevent directory
* traversal attacks.** Always perform explicit path validation and security checks
* on the returned path value to ensure it remains within expected boundaries
* before using it for file system operations.
* @since v10.12.0
* @param url The file URL string or URL object to convert to a path.
* @return The fully-resolved platform-specific Node.js file path.
*/
function fileURLToPath(url: string | URL, options?: FileUrlToPathOptions): string;
/**
* Like `url.fileURLToPath(...)` except that instead of returning a string
* representation of the path, a `Buffer` is returned. This conversion is
* helpful when the input URL contains percent-encoded segments that are
* not valid UTF-8 / Unicode sequences.
*
* **Security Considerations:**
*
* This function has the same security considerations as `url.fileURLToPath()`.
* It decodes percent-encoded characters, including encoded dot-segments
* (`%2e` as `.` and `%2e%2e` as `..`), and normalizes the path. **Applications
* must not rely on this function alone to prevent directory traversal attacks.**
* Always perform explicit path validation on the returned buffer value before
* using it for file system operations.
* @since v24.3.0
* @param url The file URL string or URL object to convert to a path.
* @returns The fully-resolved platform-specific Node.js file path
* as a `Buffer`.
*/
function fileURLToPathBuffer(url: string | URL, options?: FileUrlToPathOptions): NonSharedBuffer;
/**
* This function ensures that `path` is resolved absolutely, and that the URL
* control characters are correctly encoded when converting into a File URL.
*
* ```js
* import { pathToFileURL } from 'node:url';
*
* new URL('/foo#1', 'file:'); // Incorrect: file:///foo#1
* pathToFileURL('/foo#1'); // Correct: file:///foo%231 (POSIX)
*
* new URL('/some/path%.c', 'file:'); // Incorrect: file:///some/path%.c
* pathToFileURL('/some/path%.c'); // Correct: file:///some/path%25.c (POSIX)
* ```
* @since v10.12.0
* @param path The path to convert to a File URL.
* @return The file URL object.
*/
function pathToFileURL(path: string, options?: PathToFileUrlOptions): URL;
/**
* This utility function converts a URL object into an ordinary options object as
* expected by the `http.request()` and `https.request()` APIs.
*
* ```js
* import { urlToHttpOptions } from 'node:url';
* const myURL = new URL('https://a:b@測試?abc#foo');
*
* console.log(urlToHttpOptions(myURL));
* /*
* {
* protocol: 'https:',
* hostname: 'xn--g6w251d',
* hash: '#foo',
* search: '?abc',
* pathname: '/',
* path: '/?abc',
* href: 'https://a:b@xn--g6w251d/?abc#foo',
* auth: 'a:b'
* }
*
* ```
* @since v15.7.0, v14.18.0
* @param url The `WHATWG URL` object to convert to an options object.
* @return Options object
*/
function urlToHttpOptions(url: URL): ClientRequestArgs;
interface URLFormatOptions {
/**
* `true` if the serialized URL string should include the username and password, `false` otherwise.
* @default true
*/
auth?: boolean | undefined;
/**
* `true` if the serialized URL string should include the fragment, `false` otherwise.
* @default true
*/
fragment?: boolean | undefined;
/**
* `true` if the serialized URL string should include the search query, `false` otherwise.
* @default true
*/
search?: boolean | undefined;
/**
* `true` if Unicode characters appearing in the host component of the URL string should be encoded directly as opposed to
* being Punycode encoded.
* @default false
*/
unicode?: boolean | undefined;
}
// #region web types
type URLPatternInput = string | URLPatternInit;
interface URLPatternComponentResult {
input: string;
groups: Record<string, string | undefined>;
}
interface URLPatternInit {
protocol?: string;
username?: string;
password?: string;
hostname?: string;
port?: string;
pathname?: string;
search?: string;
hash?: string;
baseURL?: string;
}
interface URLPatternOptions {
ignoreCase?: boolean;
}
interface URLPatternResult {
inputs: URLPatternInput[];
protocol: URLPatternComponentResult;
username: URLPatternComponentResult;
password: URLPatternComponentResult;
hostname: URLPatternComponentResult;
port: URLPatternComponentResult;
pathname: URLPatternComponentResult;
search: URLPatternComponentResult;
hash: URLPatternComponentResult;
}
interface URL {
hash: string;
host: string;
hostname: string;
href: string;
readonly origin: string;
password: string;
pathname: string;
port: string;
protocol: string;
search: string;
readonly searchParams: URLSearchParams;
username: string;
toJSON(): string;
}
var URL: {
prototype: URL;
new(url: string | URL, base?: string | URL): URL;
canParse(input: string | URL, base?: string | URL): boolean;
createObjectURL(blob: Blob): string;
parse(input: string | URL, base?: string | URL): URL | null;
revokeObjectURL(id: string): void;
};
interface URLPattern {
readonly hasRegExpGroups: boolean;
readonly hash: string;
readonly hostname: string;
readonly password: string;
readonly pathname: string;
readonly port: string;
readonly protocol: string;
readonly search: string;
readonly username: string;
exec(input?: URLPatternInput, baseURL?: string | URL): URLPatternResult | null;
test(input?: URLPatternInput, baseURL?: string | URL): boolean;
}
var URLPattern: {
prototype: URLPattern;
new(input: URLPatternInput, baseURL: string | URL, options?: URLPatternOptions): URLPattern;
new(input?: URLPatternInput, options?: URLPatternOptions): URLPattern;
};
interface URLSearchParams {
readonly size: number;
append(name: string, value: string): void;
delete(name: string, value?: string): void;
get(name: string): string | null;
getAll(name: string): string[];
has(name: string, value?: string): boolean;
set(name: string, value: string): void;
sort(): void;
forEach(callbackfn: (value: string, key: string, parent: URLSearchParams) => void, thisArg?: any): void;
[Symbol.iterator](): URLSearchParamsIterator<[string, string]>;
entries(): URLSearchParamsIterator<[string, string]>;
keys(): URLSearchParamsIterator<string>;
values(): URLSearchParamsIterator<string>;
}
var URLSearchParams: {
prototype: URLSearchParams;
new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
};
interface URLSearchParamsIterator<T> extends NodeJS.Iterator<T, NodeJS.BuiltinIteratorReturn, unknown> {
[Symbol.iterator](): URLSearchParamsIterator<T>;
}
// #endregion
}
declare module "url" {
export * from "node:url";
}

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declare module "node:util/types" {
import { KeyObject, webcrypto } from "node:crypto";
/**
* Returns `true` if the value is a built-in [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) or
* [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instance.
*
* See also `util.types.isArrayBuffer()` and `util.types.isSharedArrayBuffer()`.
*
* ```js
* util.types.isAnyArrayBuffer(new ArrayBuffer()); // Returns true
* util.types.isAnyArrayBuffer(new SharedArrayBuffer()); // Returns true
* ```
* @since v10.0.0
*/
function isAnyArrayBuffer(object: unknown): object is ArrayBufferLike;
/**
* Returns `true` if the value is an `arguments` object.
*
* ```js
* function foo() {
* util.types.isArgumentsObject(arguments); // Returns true
* }
* ```
* @since v10.0.0
*/
function isArgumentsObject(object: unknown): object is IArguments;
/**
* Returns `true` if the value is a built-in [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) instance.
* This does _not_ include [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instances. Usually, it is
* desirable to test for both; See `util.types.isAnyArrayBuffer()` for that.
*
* ```js
* util.types.isArrayBuffer(new ArrayBuffer()); // Returns true
* util.types.isArrayBuffer(new SharedArrayBuffer()); // Returns false
* ```
* @since v10.0.0
*/
function isArrayBuffer(object: unknown): object is ArrayBuffer;
/**
* Returns `true` if the value is an instance of one of the [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) views, such as typed
* array objects or [`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView). Equivalent to
* [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView).
*
* ```js
* util.types.isArrayBufferView(new Int8Array()); // true
* util.types.isArrayBufferView(Buffer.from('hello world')); // true
* util.types.isArrayBufferView(new DataView(new ArrayBuffer(16))); // true
* util.types.isArrayBufferView(new ArrayBuffer()); // false
* ```
* @since v10.0.0
*/
function isArrayBufferView(object: unknown): object is NodeJS.ArrayBufferView;
/**
* Returns `true` if the value is an [async function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function).
* This only reports back what the JavaScript engine is seeing;
* in particular, the return value may not match the original source code if
* a transpilation tool was used.
*
* ```js
* util.types.isAsyncFunction(function foo() {}); // Returns false
* util.types.isAsyncFunction(async function foo() {}); // Returns true
* ```
* @since v10.0.0
*/
function isAsyncFunction(object: unknown): boolean;
/**
* Returns `true` if the value is a `BigInt64Array` instance.
*
* ```js
* util.types.isBigInt64Array(new BigInt64Array()); // Returns true
* util.types.isBigInt64Array(new BigUint64Array()); // Returns false
* ```
* @since v10.0.0
*/
function isBigInt64Array(value: unknown): value is BigInt64Array;
/**
* Returns `true` if the value is a BigInt object, e.g. created
* by `Object(BigInt(123))`.
*
* ```js
* util.types.isBigIntObject(Object(BigInt(123))); // Returns true
* util.types.isBigIntObject(BigInt(123)); // Returns false
* util.types.isBigIntObject(123); // Returns false
* ```
* @since v10.4.0
*/
function isBigIntObject(object: unknown): object is BigInt;
/**
* Returns `true` if the value is a `BigUint64Array` instance.
*
* ```js
* util.types.isBigUint64Array(new BigInt64Array()); // Returns false
* util.types.isBigUint64Array(new BigUint64Array()); // Returns true
* ```
* @since v10.0.0
*/
function isBigUint64Array(value: unknown): value is BigUint64Array;
/**
* Returns `true` if the value is a boolean object, e.g. created
* by `new Boolean()`.
*
* ```js
* util.types.isBooleanObject(false); // Returns false
* util.types.isBooleanObject(true); // Returns false
* util.types.isBooleanObject(new Boolean(false)); // Returns true
* util.types.isBooleanObject(new Boolean(true)); // Returns true
* util.types.isBooleanObject(Boolean(false)); // Returns false
* util.types.isBooleanObject(Boolean(true)); // Returns false
* ```
* @since v10.0.0
*/
function isBooleanObject(object: unknown): object is Boolean;
/**
* Returns `true` if the value is any boxed primitive object, e.g. created
* by `new Boolean()`, `new String()` or `Object(Symbol())`.
*
* For example:
*
* ```js
* util.types.isBoxedPrimitive(false); // Returns false
* util.types.isBoxedPrimitive(new Boolean(false)); // Returns true
* util.types.isBoxedPrimitive(Symbol('foo')); // Returns false
* util.types.isBoxedPrimitive(Object(Symbol('foo'))); // Returns true
* util.types.isBoxedPrimitive(Object(BigInt(5))); // Returns true
* ```
* @since v10.11.0
*/
function isBoxedPrimitive(object: unknown): object is String | Number | BigInt | Boolean | Symbol;
/**
* Returns `true` if the value is a built-in [`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView) instance.
*
* ```js
* const ab = new ArrayBuffer(20);
* util.types.isDataView(new DataView(ab)); // Returns true
* util.types.isDataView(new Float64Array()); // Returns false
* ```
*
* See also [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView).
* @since v10.0.0
*/
function isDataView(object: unknown): object is DataView;
/**
* Returns `true` if the value is a built-in [`Date`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date) instance.
*
* ```js
* util.types.isDate(new Date()); // Returns true
* ```
* @since v10.0.0
*/
function isDate(object: unknown): object is Date;
/**
* Returns `true` if the value is a native `External` value.
*
* A native `External` value is a special type of object that contains a
* raw C++ pointer (`void*`) for access from native code, and has no other
* properties. Such objects are created either by Node.js internals or native
* addons. In JavaScript, they are
* [frozen](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze) objects with a
* `null` prototype.
*
* ```c
* #include <js_native_api.h>
* #include <stdlib.h>
* napi_value result;
* static napi_value MyNapi(napi_env env, napi_callback_info info) {
* int* raw = (int*) malloc(1024);
* napi_status status = napi_create_external(env, (void*) raw, NULL, NULL, &result);
* if (status != napi_ok) {
* napi_throw_error(env, NULL, "napi_create_external failed");
* return NULL;
* }
* return result;
* }
* ...
* DECLARE_NAPI_PROPERTY("myNapi", MyNapi)
* ...
* ```
*
* ```js
* import native from 'napi_addon.node';
* import { types } from 'node:util';
*
* const data = native.myNapi();
* types.isExternal(data); // returns true
* types.isExternal(0); // returns false
* types.isExternal(new String('foo')); // returns false
* ```
*
* For further information on `napi_create_external`, refer to
* [`napi_create_external()`](https://nodejs.org/docs/latest-v25.x/api/n-api.html#napi_create_external).
* @since v10.0.0
*/
function isExternal(object: unknown): boolean;
/**
* Returns `true` if the value is a built-in [`Float16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float16Array) instance.
*
* ```js
* util.types.isFloat16Array(new ArrayBuffer()); // Returns false
* util.types.isFloat16Array(new Float16Array()); // Returns true
* util.types.isFloat16Array(new Float32Array()); // Returns false
* ```
* @since v24.0.0
*/
function isFloat16Array(object: unknown): object is Float16Array;
/**
* Returns `true` if the value is a built-in [`Float32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float32Array) instance.
*
* ```js
* util.types.isFloat32Array(new ArrayBuffer()); // Returns false
* util.types.isFloat32Array(new Float32Array()); // Returns true
* util.types.isFloat32Array(new Float64Array()); // Returns false
* ```
* @since v10.0.0
*/
function isFloat32Array(object: unknown): object is Float32Array;
/**
* Returns `true` if the value is a built-in [`Float64Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array) instance.
*
* ```js
* util.types.isFloat64Array(new ArrayBuffer()); // Returns false
* util.types.isFloat64Array(new Uint8Array()); // Returns false
* util.types.isFloat64Array(new Float64Array()); // Returns true
* ```
* @since v10.0.0
*/
function isFloat64Array(object: unknown): object is Float64Array;
/**
* Returns `true` if the value is a generator function.
* This only reports back what the JavaScript engine is seeing;
* in particular, the return value may not match the original source code if
* a transpilation tool was used.
*
* ```js
* util.types.isGeneratorFunction(function foo() {}); // Returns false
* util.types.isGeneratorFunction(function* foo() {}); // Returns true
* ```
* @since v10.0.0
*/
function isGeneratorFunction(object: unknown): object is GeneratorFunction;
/**
* Returns `true` if the value is a generator object as returned from a
* built-in generator function.
* This only reports back what the JavaScript engine is seeing;
* in particular, the return value may not match the original source code if
* a transpilation tool was used.
*
* ```js
* function* foo() {}
* const generator = foo();
* util.types.isGeneratorObject(generator); // Returns true
* ```
* @since v10.0.0
*/
function isGeneratorObject(object: unknown): object is Generator;
/**
* Returns `true` if the value is a built-in [`Int8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int8Array) instance.
*
* ```js
* util.types.isInt8Array(new ArrayBuffer()); // Returns false
* util.types.isInt8Array(new Int8Array()); // Returns true
* util.types.isInt8Array(new Float64Array()); // Returns false
* ```
* @since v10.0.0
*/
function isInt8Array(object: unknown): object is Int8Array;
/**
* Returns `true` if the value is a built-in [`Int16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int16Array) instance.
*
* ```js
* util.types.isInt16Array(new ArrayBuffer()); // Returns false
* util.types.isInt16Array(new Int16Array()); // Returns true
* util.types.isInt16Array(new Float64Array()); // Returns false
* ```
* @since v10.0.0
*/
function isInt16Array(object: unknown): object is Int16Array;
/**
* Returns `true` if the value is a built-in [`Int32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int32Array) instance.
*
* ```js
* util.types.isInt32Array(new ArrayBuffer()); // Returns false
* util.types.isInt32Array(new Int32Array()); // Returns true
* util.types.isInt32Array(new Float64Array()); // Returns false
* ```
* @since v10.0.0
*/
function isInt32Array(object: unknown): object is Int32Array;
/**
* Returns `true` if the value is a built-in [`Map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) instance.
*
* ```js
* util.types.isMap(new Map()); // Returns true
* ```
* @since v10.0.0
*/
function isMap<T>(
object: T | {},
): object is T extends ReadonlyMap<any, any> ? (unknown extends T ? never : ReadonlyMap<any, any>)
: Map<unknown, unknown>;
/**
* Returns `true` if the value is an iterator returned for a built-in [`Map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) instance.
*
* ```js
* const map = new Map();
* util.types.isMapIterator(map.keys()); // Returns true
* util.types.isMapIterator(map.values()); // Returns true
* util.types.isMapIterator(map.entries()); // Returns true
* util.types.isMapIterator(map[Symbol.iterator]()); // Returns true
* ```
* @since v10.0.0
*/
function isMapIterator(object: unknown): boolean;
/**
* Returns `true` if the value is an instance of a [Module Namespace Object](https://tc39.github.io/ecma262/#sec-module-namespace-exotic-objects).
*
* ```js
* import * as ns from './a.js';
*
* util.types.isModuleNamespaceObject(ns); // Returns true
* ```
* @since v10.0.0
*/
function isModuleNamespaceObject(value: unknown): boolean;
/**
* Returns `true` if the value was returned by the constructor of a
* [built-in `Error` type](https://tc39.es/ecma262/#sec-error-objects).
*
* ```js
* console.log(util.types.isNativeError(new Error())); // true
* console.log(util.types.isNativeError(new TypeError())); // true
* console.log(util.types.isNativeError(new RangeError())); // true
* ```
*
* Subclasses of the native error types are also native errors:
*
* ```js
* class MyError extends Error {}
* console.log(util.types.isNativeError(new MyError())); // true
* ```
*
* A value being `instanceof` a native error class is not equivalent to `isNativeError()`
* returning `true` for that value. `isNativeError()` returns `true` for errors
* which come from a different [realm](https://tc39.es/ecma262/#realm) while `instanceof Error` returns `false`
* for these errors:
*
* ```js
* import { createContext, runInContext } from 'node:vm';
* import { types } from 'node:util';
*
* const context = createContext({});
* const myError = runInContext('new Error()', context);
* console.log(types.isNativeError(myError)); // true
* console.log(myError instanceof Error); // false
* ```
*
* Conversely, `isNativeError()` returns `false` for all objects which were not
* returned by the constructor of a native error. That includes values
* which are `instanceof` native errors:
*
* ```js
* const myError = { __proto__: Error.prototype };
* console.log(util.types.isNativeError(myError)); // false
* console.log(myError instanceof Error); // true
* ```
* @since v10.0.0
* @deprecated The `util.types.isNativeError` API is deprecated. Please use `Error.isError` instead.
*/
function isNativeError(object: unknown): object is Error;
/**
* Returns `true` if the value is a number object, e.g. created
* by `new Number()`.
*
* ```js
* util.types.isNumberObject(0); // Returns false
* util.types.isNumberObject(new Number(0)); // Returns true
* ```
* @since v10.0.0
*/
function isNumberObject(object: unknown): object is Number;
/**
* Returns `true` if the value is a built-in [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise).
*
* ```js
* util.types.isPromise(Promise.resolve(42)); // Returns true
* ```
* @since v10.0.0
*/
function isPromise(object: unknown): object is Promise<unknown>;
/**
* Returns `true` if the value is a [`Proxy`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy) instance.
*
* ```js
* const target = {};
* const proxy = new Proxy(target, {});
* util.types.isProxy(target); // Returns false
* util.types.isProxy(proxy); // Returns true
* ```
* @since v10.0.0
*/
function isProxy(object: unknown): boolean;
/**
* Returns `true` if the value is a regular expression object.
*
* ```js
* util.types.isRegExp(/abc/); // Returns true
* util.types.isRegExp(new RegExp('abc')); // Returns true
* ```
* @since v10.0.0
*/
function isRegExp(object: unknown): object is RegExp;
/**
* Returns `true` if the value is a built-in [`Set`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) instance.
*
* ```js
* util.types.isSet(new Set()); // Returns true
* ```
* @since v10.0.0
*/
function isSet<T>(
object: T | {},
): object is T extends ReadonlySet<any> ? (unknown extends T ? never : ReadonlySet<any>) : Set<unknown>;
/**
* Returns `true` if the value is an iterator returned for a built-in [`Set`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) instance.
*
* ```js
* const set = new Set();
* util.types.isSetIterator(set.keys()); // Returns true
* util.types.isSetIterator(set.values()); // Returns true
* util.types.isSetIterator(set.entries()); // Returns true
* util.types.isSetIterator(set[Symbol.iterator]()); // Returns true
* ```
* @since v10.0.0
*/
function isSetIterator(object: unknown): boolean;
/**
* Returns `true` if the value is a built-in [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instance.
* This does _not_ include [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) instances. Usually, it is
* desirable to test for both; See `util.types.isAnyArrayBuffer()` for that.
*
* ```js
* util.types.isSharedArrayBuffer(new ArrayBuffer()); // Returns false
* util.types.isSharedArrayBuffer(new SharedArrayBuffer()); // Returns true
* ```
* @since v10.0.0
*/
function isSharedArrayBuffer(object: unknown): object is SharedArrayBuffer;
/**
* Returns `true` if the value is a string object, e.g. created
* by `new String()`.
*
* ```js
* util.types.isStringObject('foo'); // Returns false
* util.types.isStringObject(new String('foo')); // Returns true
* ```
* @since v10.0.0
*/
function isStringObject(object: unknown): object is String;
/**
* Returns `true` if the value is a symbol object, created
* by calling `Object()` on a `Symbol` primitive.
*
* ```js
* const symbol = Symbol('foo');
* util.types.isSymbolObject(symbol); // Returns false
* util.types.isSymbolObject(Object(symbol)); // Returns true
* ```
* @since v10.0.0
*/
function isSymbolObject(object: unknown): object is Symbol;
/**
* Returns `true` if the value is a built-in [`TypedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray) instance.
*
* ```js
* util.types.isTypedArray(new ArrayBuffer()); // Returns false
* util.types.isTypedArray(new Uint8Array()); // Returns true
* util.types.isTypedArray(new Float64Array()); // Returns true
* ```
*
* See also [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView).
* @since v10.0.0
*/
function isTypedArray(object: unknown): object is NodeJS.TypedArray;
/**
* Returns `true` if the value is a built-in [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) instance.
*
* ```js
* util.types.isUint8Array(new ArrayBuffer()); // Returns false
* util.types.isUint8Array(new Uint8Array()); // Returns true
* util.types.isUint8Array(new Float64Array()); // Returns false
* ```
* @since v10.0.0
*/
function isUint8Array(object: unknown): object is Uint8Array;
/**
* Returns `true` if the value is a built-in [`Uint8ClampedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray) instance.
*
* ```js
* util.types.isUint8ClampedArray(new ArrayBuffer()); // Returns false
* util.types.isUint8ClampedArray(new Uint8ClampedArray()); // Returns true
* util.types.isUint8ClampedArray(new Float64Array()); // Returns false
* ```
* @since v10.0.0
*/
function isUint8ClampedArray(object: unknown): object is Uint8ClampedArray;
/**
* Returns `true` if the value is a built-in [`Uint16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint16Array) instance.
*
* ```js
* util.types.isUint16Array(new ArrayBuffer()); // Returns false
* util.types.isUint16Array(new Uint16Array()); // Returns true
* util.types.isUint16Array(new Float64Array()); // Returns false
* ```
* @since v10.0.0
*/
function isUint16Array(object: unknown): object is Uint16Array;
/**
* Returns `true` if the value is a built-in [`Uint32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint32Array) instance.
*
* ```js
* util.types.isUint32Array(new ArrayBuffer()); // Returns false
* util.types.isUint32Array(new Uint32Array()); // Returns true
* util.types.isUint32Array(new Float64Array()); // Returns false
* ```
* @since v10.0.0
*/
function isUint32Array(object: unknown): object is Uint32Array;
/**
* Returns `true` if the value is a built-in [`WeakMap`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap) instance.
*
* ```js
* util.types.isWeakMap(new WeakMap()); // Returns true
* ```
* @since v10.0.0
*/
function isWeakMap(object: unknown): object is WeakMap<object, unknown>;
/**
* Returns `true` if the value is a built-in [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) instance.
*
* ```js
* util.types.isWeakSet(new WeakSet()); // Returns true
* ```
* @since v10.0.0
*/
function isWeakSet(object: unknown): object is WeakSet<object>;
/**
* Returns `true` if `value` is a `KeyObject`, `false` otherwise.
* @since v16.2.0
*/
function isKeyObject(object: unknown): object is KeyObject;
/**
* Returns `true` if `value` is a `CryptoKey`, `false` otherwise.
* @since v16.2.0
*/
function isCryptoKey(object: unknown): object is webcrypto.CryptoKey;
}
declare module "util/types" {
export * from "node:util/types";
}

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/**
* The `node:v8` module exposes APIs that are specific to the version of [V8](https://developers.google.com/v8/) built into the Node.js binary. It can be accessed using:
*
* ```js
* import v8 from 'node:v8';
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/v8.js)
*/
declare module "node:v8" {
import { NonSharedBuffer } from "node:buffer";
import { Readable } from "node:stream";
interface HeapSpaceInfo {
space_name: string;
space_size: number;
space_used_size: number;
space_available_size: number;
physical_space_size: number;
}
// ** Signifies if the --zap_code_space option is enabled or not. 1 == enabled, 0 == disabled. */
type DoesZapCodeSpaceFlag = 0 | 1;
interface HeapInfo {
total_heap_size: number;
total_heap_size_executable: number;
total_physical_size: number;
total_available_size: number;
used_heap_size: number;
heap_size_limit: number;
malloced_memory: number;
peak_malloced_memory: number;
does_zap_garbage: DoesZapCodeSpaceFlag;
number_of_native_contexts: number;
number_of_detached_contexts: number;
total_global_handles_size: number;
used_global_handles_size: number;
external_memory: number;
total_allocated_bytes: number;
}
interface HeapCodeStatistics {
code_and_metadata_size: number;
bytecode_and_metadata_size: number;
external_script_source_size: number;
}
interface HeapSnapshotOptions {
/**
* If true, expose internals in the heap snapshot.
* @default false
*/
exposeInternals?: boolean | undefined;
/**
* If true, expose numeric values in artificial fields.
* @default false
*/
exposeNumericValues?: boolean | undefined;
}
/**
* Returns an integer representing a version tag derived from the V8 version,
* command-line flags, and detected CPU features. This is useful for determining
* whether a `vm.Script` `cachedData` buffer is compatible with this instance
* of V8.
*
* ```js
* console.log(v8.cachedDataVersionTag()); // 3947234607
* // The value returned by v8.cachedDataVersionTag() is derived from the V8
* // version, command-line flags, and detected CPU features. Test that the value
* // does indeed update when flags are toggled.
* v8.setFlagsFromString('--allow_natives_syntax');
* console.log(v8.cachedDataVersionTag()); // 183726201
* ```
* @since v8.0.0
*/
function cachedDataVersionTag(): number;
/**
* Returns an object with the following properties:
*
* `does_zap_garbage` is a 0/1 boolean, which signifies whether the `--zap_code_space` option is enabled or not. This makes V8 overwrite heap
* garbage with a bit pattern. The RSS footprint (resident set size) gets bigger
* because it continuously touches all heap pages and that makes them less likely
* to get swapped out by the operating system.
*
* `number_of_native_contexts` The value of native\_context is the number of the
* top-level contexts currently active. Increase of this number over time indicates
* a memory leak.
*
* `number_of_detached_contexts` The value of detached\_context is the number
* of contexts that were detached and not yet garbage collected. This number
* being non-zero indicates a potential memory leak.
*
* `total_global_handles_size` The value of total\_global\_handles\_size is the
* total memory size of V8 global handles.
*
* `used_global_handles_size` The value of used\_global\_handles\_size is the
* used memory size of V8 global handles.
*
* `external_memory` The value of external\_memory is the memory size of array
* buffers and external strings.
*
* `total_allocated_bytes` The value of total allocated bytes since the Isolate
* creation.
*
* ```js
* {
* total_heap_size: 7326976,
* total_heap_size_executable: 4194304,
* total_physical_size: 7326976,
* total_available_size: 1152656,
* used_heap_size: 3476208,
* heap_size_limit: 1535115264,
* malloced_memory: 16384,
* peak_malloced_memory: 1127496,
* does_zap_garbage: 0,
* number_of_native_contexts: 1,
* number_of_detached_contexts: 0,
* total_global_handles_size: 8192,
* used_global_handles_size: 3296,
* external_memory: 318824,
* total_allocated_bytes: 45224088
* }
* ```
* @since v1.0.0
*/
function getHeapStatistics(): HeapInfo;
/**
* It returns an object with a structure similar to the
* [`cppgc::HeapStatistics`](https://v8docs.nodesource.com/node-22.4/d7/d51/heap-statistics_8h_source.html)
* object. See the [V8 documentation](https://v8docs.nodesource.com/node-22.4/df/d2f/structcppgc_1_1_heap_statistics.html)
* for more information about the properties of the object.
*
* ```js
* // Detailed
* ({
* committed_size_bytes: 131072,
* resident_size_bytes: 131072,
* used_size_bytes: 152,
* space_statistics: [
* {
* name: 'NormalPageSpace0',
* committed_size_bytes: 0,
* resident_size_bytes: 0,
* used_size_bytes: 0,
* page_stats: [{}],
* free_list_stats: {},
* },
* {
* name: 'NormalPageSpace1',
* committed_size_bytes: 131072,
* resident_size_bytes: 131072,
* used_size_bytes: 152,
* page_stats: [{}],
* free_list_stats: {},
* },
* {
* name: 'NormalPageSpace2',
* committed_size_bytes: 0,
* resident_size_bytes: 0,
* used_size_bytes: 0,
* page_stats: [{}],
* free_list_stats: {},
* },
* {
* name: 'NormalPageSpace3',
* committed_size_bytes: 0,
* resident_size_bytes: 0,
* used_size_bytes: 0,
* page_stats: [{}],
* free_list_stats: {},
* },
* {
* name: 'LargePageSpace',
* committed_size_bytes: 0,
* resident_size_bytes: 0,
* used_size_bytes: 0,
* page_stats: [{}],
* free_list_stats: {},
* },
* ],
* type_names: [],
* detail_level: 'detailed',
* });
* ```
*
* ```js
* // Brief
* ({
* committed_size_bytes: 131072,
* resident_size_bytes: 131072,
* used_size_bytes: 128864,
* space_statistics: [],
* type_names: [],
* detail_level: 'brief',
* });
* ```
* @since v22.15.0
* @param detailLevel **Default:** `'detailed'`. Specifies the level of detail in the returned statistics.
* Accepted values are:
* * `'brief'`: Brief statistics contain only the top-level
* allocated and used
* memory statistics for the entire heap.
* * `'detailed'`: Detailed statistics also contain a break
* down per space and page, as well as freelist statistics
* and object type histograms.
*/
function getCppHeapStatistics(detailLevel?: "brief" | "detailed"): object;
/**
* Returns statistics about the V8 heap spaces, i.e. the segments which make up
* the V8 heap. Neither the ordering of heap spaces, nor the availability of a
* heap space can be guaranteed as the statistics are provided via the
* V8 [`GetHeapSpaceStatistics`](https://v8docs.nodesource.com/node-13.2/d5/dda/classv8_1_1_isolate.html#ac673576f24fdc7a33378f8f57e1d13a4) function and may change from one V8 version to the
* next.
*
* The value returned is an array of objects containing the following properties:
*
* ```json
* [
* {
* "space_name": "new_space",
* "space_size": 2063872,
* "space_used_size": 951112,
* "space_available_size": 80824,
* "physical_space_size": 2063872
* },
* {
* "space_name": "old_space",
* "space_size": 3090560,
* "space_used_size": 2493792,
* "space_available_size": 0,
* "physical_space_size": 3090560
* },
* {
* "space_name": "code_space",
* "space_size": 1260160,
* "space_used_size": 644256,
* "space_available_size": 960,
* "physical_space_size": 1260160
* },
* {
* "space_name": "map_space",
* "space_size": 1094160,
* "space_used_size": 201608,
* "space_available_size": 0,
* "physical_space_size": 1094160
* },
* {
* "space_name": "large_object_space",
* "space_size": 0,
* "space_used_size": 0,
* "space_available_size": 1490980608,
* "physical_space_size": 0
* }
* ]
* ```
* @since v6.0.0
*/
function getHeapSpaceStatistics(): HeapSpaceInfo[];
/**
* The `v8.setFlagsFromString()` method can be used to programmatically set
* V8 command-line flags. This method should be used with care. Changing settings
* after the VM has started may result in unpredictable behavior, including
* crashes and data loss; or it may simply do nothing.
*
* The V8 options available for a version of Node.js may be determined by running `node --v8-options`.
*
* Usage:
*
* ```js
* // Print GC events to stdout for one minute.
* import v8 from 'node:v8';
* v8.setFlagsFromString('--trace_gc');
* setTimeout(() => { v8.setFlagsFromString('--notrace_gc'); }, 60e3);
* ```
* @since v1.0.0
*/
function setFlagsFromString(flags: string): void;
/**
* This is similar to the [`queryObjects()` console API](https://developer.chrome.com/docs/devtools/console/utilities#queryObjects-function)
* provided by the Chromium DevTools console. It can be used to search for objects that have the matching constructor on its prototype chain
* in the heap after a full garbage collection, which can be useful for memory leak regression tests. To avoid surprising results, users should
* avoid using this API on constructors whose implementation they don't control, or on constructors that can be invoked by other parties in the
* application.
*
* To avoid accidental leaks, this API does not return raw references to the objects found. By default, it returns the count of the objects
* found. If `options.format` is `'summary'`, it returns an array containing brief string representations for each object. The visibility provided
* in this API is similar to what the heap snapshot provides, while users can save the cost of serialization and parsing and directly filter the
* target objects during the search.
*
* Only objects created in the current execution context are included in the results.
*
* ```js
* import { queryObjects } from 'node:v8';
* class A { foo = 'bar'; }
* console.log(queryObjects(A)); // 0
* const a = new A();
* console.log(queryObjects(A)); // 1
* // [ "A { foo: 'bar' }" ]
* console.log(queryObjects(A, { format: 'summary' }));
*
* class B extends A { bar = 'qux'; }
* const b = new B();
* console.log(queryObjects(B)); // 1
* // [ "B { foo: 'bar', bar: 'qux' }" ]
* console.log(queryObjects(B, { format: 'summary' }));
*
* // Note that, when there are child classes inheriting from a constructor,
* // the constructor also shows up in the prototype chain of the child
* // classes's prototoype, so the child classes's prototoype would also be
* // included in the result.
* console.log(queryObjects(A)); // 3
* // [ "B { foo: 'bar', bar: 'qux' }", 'A {}', "A { foo: 'bar' }" ]
* console.log(queryObjects(A, { format: 'summary' }));
* ```
* @param ctor The constructor that can be used to search on the prototype chain in order to filter target objects in the heap.
* @since v20.13.0
*/
function queryObjects(ctor: Function): number | string[];
function queryObjects(ctor: Function, options: { format: "count" }): number;
function queryObjects(ctor: Function, options: { format: "summary" }): string[];
/**
* Generates a snapshot of the current V8 heap and returns a Readable
* Stream that may be used to read the JSON serialized representation.
* This JSON stream format is intended to be used with tools such as
* Chrome DevTools. The JSON schema is undocumented and specific to the
* V8 engine. Therefore, the schema may change from one version of V8 to the next.
*
* Creating a heap snapshot requires memory about twice the size of the heap at
* the time the snapshot is created. This results in the risk of OOM killers
* terminating the process.
*
* Generating a snapshot is a synchronous operation which blocks the event loop
* for a duration depending on the heap size.
*
* ```js
* // Print heap snapshot to the console
* import v8 from 'node:v8';
* const stream = v8.getHeapSnapshot();
* stream.pipe(process.stdout);
* ```
* @since v11.13.0
* @return A Readable containing the V8 heap snapshot.
*/
function getHeapSnapshot(options?: HeapSnapshotOptions): Readable;
/**
* Generates a snapshot of the current V8 heap and writes it to a JSON
* file. This file is intended to be used with tools such as Chrome
* DevTools. The JSON schema is undocumented and specific to the V8
* engine, and may change from one version of V8 to the next.
*
* A heap snapshot is specific to a single V8 isolate. When using `worker threads`, a heap snapshot generated from the main thread will
* not contain any information about the workers, and vice versa.
*
* Creating a heap snapshot requires memory about twice the size of the heap at
* the time the snapshot is created. This results in the risk of OOM killers
* terminating the process.
*
* Generating a snapshot is a synchronous operation which blocks the event loop
* for a duration depending on the heap size.
*
* ```js
* import { writeHeapSnapshot } from 'node:v8';
* import {
* Worker,
* isMainThread,
* parentPort,
* } from 'node:worker_threads';
*
* if (isMainThread) {
* const worker = new Worker(__filename);
*
* worker.once('message', (filename) => {
* console.log(`worker heapdump: ${filename}`);
* // Now get a heapdump for the main thread.
* console.log(`main thread heapdump: ${writeHeapSnapshot()}`);
* });
*
* // Tell the worker to create a heapdump.
* worker.postMessage('heapdump');
* } else {
* parentPort.once('message', (message) => {
* if (message === 'heapdump') {
* // Generate a heapdump for the worker
* // and return the filename to the parent.
* parentPort.postMessage(writeHeapSnapshot());
* }
* });
* }
* ```
* @since v11.13.0
* @param filename The file path where the V8 heap snapshot is to be saved. If not specified, a file name with the pattern `'Heap-${yyyymmdd}-${hhmmss}-${pid}-${thread_id}.heapsnapshot'` will be
* generated, where `{pid}` will be the PID of the Node.js process, `{thread_id}` will be `0` when `writeHeapSnapshot()` is called from the main Node.js thread or the id of a
* worker thread.
* @return The filename where the snapshot was saved.
*/
function writeHeapSnapshot(filename?: string, options?: HeapSnapshotOptions): string;
/**
* Get statistics about code and its metadata in the heap, see
* V8 [`GetHeapCodeAndMetadataStatistics`](https://v8docs.nodesource.com/node-13.2/d5/dda/classv8_1_1_isolate.html#a6079122af17612ef54ef3348ce170866) API. Returns an object with the
* following properties:
*
* ```js
* {
* code_and_metadata_size: 212208,
* bytecode_and_metadata_size: 161368,
* external_script_source_size: 1410794,
* cpu_profiler_metadata_size: 0,
* }
* ```
* @since v12.8.0
*/
function getHeapCodeStatistics(): HeapCodeStatistics;
/**
* @since v25.0.0
*/
interface SyncCPUProfileHandle {
/**
* Stopping collecting the profile and return the profile data.
* @since v25.0.0
*/
stop(): string;
/**
* Stopping collecting the profile and the profile will be discarded.
* @since v25.0.0
*/
[Symbol.dispose](): void;
}
/**
* @since v24.8.0
*/
interface CPUProfileHandle {
/**
* Stopping collecting the profile, then return a Promise that fulfills with an error or the
* profile data.
* @since v24.8.0
*/
stop(): Promise<string>;
/**
* Stopping collecting the profile and the profile will be discarded.
* @since v24.8.0
*/
[Symbol.asyncDispose](): Promise<void>;
}
/**
* @since v24.9.0
*/
interface HeapProfileHandle {
/**
* Stopping collecting the profile, then return a Promise that fulfills with an error or the
* profile data.
* @since v24.9.0
*/
stop(): Promise<string>;
/**
* Stopping collecting the profile and the profile will be discarded.
* @since v24.9.0
*/
[Symbol.asyncDispose](): Promise<void>;
}
/**
* Starting a CPU profile then return a `SyncCPUProfileHandle` object.
* This API supports `using` syntax.
*
* ```js
* const handle = v8.startCpuProfile();
* const profile = handle.stop();
* console.log(profile);
* ```
* @since v25.0.0
*/
function startCpuProfile(): SyncCPUProfileHandle;
/**
* V8 only supports `Latin-1/ISO-8859-1` and `UTF16` as the underlying representation of a string.
* If the `content` uses `Latin-1/ISO-8859-1` as the underlying representation, this function will return true;
* otherwise, it returns false.
*
* If this method returns false, that does not mean that the string contains some characters not in `Latin-1/ISO-8859-1`.
* Sometimes a `Latin-1` string may also be represented as `UTF16`.
*
* ```js
* const { isStringOneByteRepresentation } = require('node:v8');
*
* const Encoding = {
* latin1: 1,
* utf16le: 2,
* };
* const buffer = Buffer.alloc(100);
* function writeString(input) {
* if (isStringOneByteRepresentation(input)) {
* buffer.writeUint8(Encoding.latin1);
* buffer.writeUint32LE(input.length, 1);
* buffer.write(input, 5, 'latin1');
* } else {
* buffer.writeUint8(Encoding.utf16le);
* buffer.writeUint32LE(input.length * 2, 1);
* buffer.write(input, 5, 'utf16le');
* }
* }
* writeString('hello');
* writeString('你好');
* ```
* @since v23.10.0, v22.15.0
*/
function isStringOneByteRepresentation(content: string): boolean;
/**
* @since v8.0.0
*/
class Serializer {
/**
* Writes out a header, which includes the serialization format version.
*/
writeHeader(): void;
/**
* Serializes a JavaScript value and adds the serialized representation to the
* internal buffer.
*
* This throws an error if `value` cannot be serialized.
*/
writeValue(val: any): boolean;
/**
* Returns the stored internal buffer. This serializer should not be used once
* the buffer is released. Calling this method results in undefined behavior
* if a previous write has failed.
*/
releaseBuffer(): NonSharedBuffer;
/**
* Marks an `ArrayBuffer` as having its contents transferred out of band.
* Pass the corresponding `ArrayBuffer` in the deserializing context to `deserializer.transferArrayBuffer()`.
* @param id A 32-bit unsigned integer.
* @param arrayBuffer An `ArrayBuffer` instance.
*/
transferArrayBuffer(id: number, arrayBuffer: ArrayBuffer): void;
/**
* Write a raw 32-bit unsigned integer.
* For use inside of a custom `serializer._writeHostObject()`.
*/
writeUint32(value: number): void;
/**
* Write a raw 64-bit unsigned integer, split into high and low 32-bit parts.
* For use inside of a custom `serializer._writeHostObject()`.
*/
writeUint64(hi: number, lo: number): void;
/**
* Write a JS `number` value.
* For use inside of a custom `serializer._writeHostObject()`.
*/
writeDouble(value: number): void;
/**
* Write raw bytes into the serializer's internal buffer. The deserializer
* will require a way to compute the length of the buffer.
* For use inside of a custom `serializer._writeHostObject()`.
*/
writeRawBytes(buffer: NodeJS.ArrayBufferView): void;
}
/**
* A subclass of `Serializer` that serializes `TypedArray`(in particular `Buffer`) and `DataView` objects as host objects, and only
* stores the part of their underlying `ArrayBuffer`s that they are referring to.
* @since v8.0.0
*/
class DefaultSerializer extends Serializer {}
/**
* @since v8.0.0
*/
class Deserializer {
constructor(data: NodeJS.TypedArray);
/**
* Reads and validates a header (including the format version).
* May, for example, reject an invalid or unsupported wire format. In that case,
* an `Error` is thrown.
*/
readHeader(): boolean;
/**
* Deserializes a JavaScript value from the buffer and returns it.
*/
readValue(): any;
/**
* Marks an `ArrayBuffer` as having its contents transferred out of band.
* Pass the corresponding `ArrayBuffer` in the serializing context to `serializer.transferArrayBuffer()` (or return the `id` from `serializer._getSharedArrayBufferId()` in the case of
* `SharedArrayBuffer`s).
* @param id A 32-bit unsigned integer.
* @param arrayBuffer An `ArrayBuffer` instance.
*/
transferArrayBuffer(id: number, arrayBuffer: ArrayBuffer): void;
/**
* Reads the underlying wire format version. Likely mostly to be useful to
* legacy code reading old wire format versions. May not be called before `.readHeader()`.
*/
getWireFormatVersion(): number;
/**
* Read a raw 32-bit unsigned integer and return it.
* For use inside of a custom `deserializer._readHostObject()`.
*/
readUint32(): number;
/**
* Read a raw 64-bit unsigned integer and return it as an array `[hi, lo]` with two 32-bit unsigned integer entries.
* For use inside of a custom `deserializer._readHostObject()`.
*/
readUint64(): [number, number];
/**
* Read a JS `number` value.
* For use inside of a custom `deserializer._readHostObject()`.
*/
readDouble(): number;
/**
* Read raw bytes from the deserializer's internal buffer. The `length` parameter
* must correspond to the length of the buffer that was passed to `serializer.writeRawBytes()`.
* For use inside of a custom `deserializer._readHostObject()`.
*/
readRawBytes(length: number): Buffer;
}
/**
* A subclass of `Deserializer` corresponding to the format written by `DefaultSerializer`.
* @since v8.0.0
*/
class DefaultDeserializer extends Deserializer {}
/**
* Uses a `DefaultSerializer` to serialize `value` into a buffer.
*
* `ERR_BUFFER_TOO_LARGE` will be thrown when trying to
* serialize a huge object which requires buffer
* larger than `buffer.constants.MAX_LENGTH`.
* @since v8.0.0
*/
function serialize(value: any): NonSharedBuffer;
/**
* Uses a `DefaultDeserializer` with default options to read a JS value
* from a buffer.
* @since v8.0.0
* @param buffer A buffer returned by {@link serialize}.
*/
function deserialize(buffer: NodeJS.ArrayBufferView): any;
/**
* The `v8.takeCoverage()` method allows the user to write the coverage started by `NODE_V8_COVERAGE` to disk on demand. This method can be invoked multiple
* times during the lifetime of the process. Each time the execution counter will
* be reset and a new coverage report will be written to the directory specified
* by `NODE_V8_COVERAGE`.
*
* When the process is about to exit, one last coverage will still be written to
* disk unless {@link stopCoverage} is invoked before the process exits.
* @since v15.1.0, v14.18.0, v12.22.0
*/
function takeCoverage(): void;
/**
* The `v8.stopCoverage()` method allows the user to stop the coverage collection
* started by `NODE_V8_COVERAGE`, so that V8 can release the execution count
* records and optimize code. This can be used in conjunction with {@link takeCoverage} if the user wants to collect the coverage on demand.
* @since v15.1.0, v14.18.0, v12.22.0
*/
function stopCoverage(): void;
/**
* The API is a no-op if `--heapsnapshot-near-heap-limit` is already set from the command line or the API is called more than once.
* `limit` must be a positive integer. See [`--heapsnapshot-near-heap-limit`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--heapsnapshot-near-heap-limitmax_count) for more information.
* @since v18.10.0, v16.18.0
*/
function setHeapSnapshotNearHeapLimit(limit: number): void;
/**
* This API collects GC data in current thread.
* @since v19.6.0, v18.15.0
*/
class GCProfiler {
/**
* Start collecting GC data.
* @since v19.6.0, v18.15.0
*/
start(): void;
/**
* Stop collecting GC data and return an object. The content of object
* is as follows.
*
* ```json
* {
* "version": 1,
* "startTime": 1674059033862,
* "statistics": [
* {
* "gcType": "Scavenge",
* "beforeGC": {
* "heapStatistics": {
* "totalHeapSize": 5005312,
* "totalHeapSizeExecutable": 524288,
* "totalPhysicalSize": 5226496,
* "totalAvailableSize": 4341325216,
* "totalGlobalHandlesSize": 8192,
* "usedGlobalHandlesSize": 2112,
* "usedHeapSize": 4883840,
* "heapSizeLimit": 4345298944,
* "mallocedMemory": 254128,
* "externalMemory": 225138,
* "peakMallocedMemory": 181760
* },
* "heapSpaceStatistics": [
* {
* "spaceName": "read_only_space",
* "spaceSize": 0,
* "spaceUsedSize": 0,
* "spaceAvailableSize": 0,
* "physicalSpaceSize": 0
* }
* ]
* },
* "cost": 1574.14,
* "afterGC": {
* "heapStatistics": {
* "totalHeapSize": 6053888,
* "totalHeapSizeExecutable": 524288,
* "totalPhysicalSize": 5500928,
* "totalAvailableSize": 4341101384,
* "totalGlobalHandlesSize": 8192,
* "usedGlobalHandlesSize": 2112,
* "usedHeapSize": 4059096,
* "heapSizeLimit": 4345298944,
* "mallocedMemory": 254128,
* "externalMemory": 225138,
* "peakMallocedMemory": 181760
* },
* "heapSpaceStatistics": [
* {
* "spaceName": "read_only_space",
* "spaceSize": 0,
* "spaceUsedSize": 0,
* "spaceAvailableSize": 0,
* "physicalSpaceSize": 0
* }
* ]
* }
* }
* ],
* "endTime": 1674059036865
* }
* ```
*
* Here's an example.
*
* ```js
* import { GCProfiler } from 'node:v8';
* const profiler = new GCProfiler();
* profiler.start();
* setTimeout(() => {
* console.log(profiler.stop());
* }, 1000);
* ```
* @since v19.6.0, v18.15.0
*/
stop(): GCProfilerResult;
/**
* Stop collecting GC data, and discard the profile.
* @since v25.5.0
*/
[Symbol.dispose](): void;
}
interface GCProfilerResult {
version: number;
startTime: number;
endTime: number;
statistics: Array<{
gcType: string;
cost: number;
beforeGC: {
heapStatistics: HeapStatistics;
heapSpaceStatistics: HeapSpaceStatistics[];
};
afterGC: {
heapStatistics: HeapStatistics;
heapSpaceStatistics: HeapSpaceStatistics[];
};
}>;
}
interface HeapStatistics {
totalHeapSize: number;
totalHeapSizeExecutable: number;
totalPhysicalSize: number;
totalAvailableSize: number;
totalGlobalHandlesSize: number;
usedGlobalHandlesSize: number;
usedHeapSize: number;
heapSizeLimit: number;
mallocedMemory: number;
externalMemory: number;
peakMallocedMemory: number;
}
interface HeapSpaceStatistics {
spaceName: string;
spaceSize: number;
spaceUsedSize: number;
spaceAvailableSize: number;
physicalSpaceSize: number;
}
/**
* Called when a promise is constructed. This does not mean that corresponding before/after events will occur, only that the possibility exists. This will
* happen if a promise is created without ever getting a continuation.
* @since v17.1.0, v16.14.0
* @param promise The promise being created.
* @param parent The promise continued from, if applicable.
*/
interface Init {
(promise: Promise<unknown>, parent: Promise<unknown>): void;
}
/**
* Called before a promise continuation executes. This can be in the form of `then()`, `catch()`, or `finally()` handlers or an await resuming.
*
* The before callback will be called 0 to N times. The before callback will typically be called 0 times if no continuation was ever made for the promise.
* The before callback may be called many times in the case where many continuations have been made from the same promise.
* @since v17.1.0, v16.14.0
*/
interface Before {
(promise: Promise<unknown>): void;
}
/**
* Called immediately after a promise continuation executes. This may be after a `then()`, `catch()`, or `finally()` handler or before an await after another await.
* @since v17.1.0, v16.14.0
*/
interface After {
(promise: Promise<unknown>): void;
}
/**
* Called when the promise receives a resolution or rejection value. This may occur synchronously in the case of {@link Promise.resolve()} or
* {@link Promise.reject()}.
* @since v17.1.0, v16.14.0
*/
interface Settled {
(promise: Promise<unknown>): void;
}
/**
* Key events in the lifetime of a promise have been categorized into four areas: creation of a promise, before/after a continuation handler is called or
* around an await, and when the promise resolves or rejects.
*
* Because promises are asynchronous resources whose lifecycle is tracked via the promise hooks mechanism, the `init()`, `before()`, `after()`, and
* `settled()` callbacks must not be async functions as they create more promises which would produce an infinite loop.
* @since v17.1.0, v16.14.0
*/
interface HookCallbacks {
init?: Init;
before?: Before;
after?: After;
settled?: Settled;
}
interface PromiseHooks {
/**
* The `init` hook must be a plain function. Providing an async function will throw as it would produce an infinite microtask loop.
* @since v17.1.0, v16.14.0
* @param init The {@link Init | `init` callback} to call when a promise is created.
* @return Call to stop the hook.
*/
onInit: (init: Init) => Function;
/**
* The `settled` hook must be a plain function. Providing an async function will throw as it would produce an infinite microtask loop.
* @since v17.1.0, v16.14.0
* @param settled The {@link Settled | `settled` callback} to call when a promise is created.
* @return Call to stop the hook.
*/
onSettled: (settled: Settled) => Function;
/**
* The `before` hook must be a plain function. Providing an async function will throw as it would produce an infinite microtask loop.
* @since v17.1.0, v16.14.0
* @param before The {@link Before | `before` callback} to call before a promise continuation executes.
* @return Call to stop the hook.
*/
onBefore: (before: Before) => Function;
/**
* The `after` hook must be a plain function. Providing an async function will throw as it would produce an infinite microtask loop.
* @since v17.1.0, v16.14.0
* @param after The {@link After | `after` callback} to call after a promise continuation executes.
* @return Call to stop the hook.
*/
onAfter: (after: After) => Function;
/**
* Registers functions to be called for different lifetime events of each promise.
* The callbacks `init()`/`before()`/`after()`/`settled()` are called for the respective events during a promise's lifetime.
* All callbacks are optional. For example, if only promise creation needs to be tracked, then only the init callback needs to be passed.
* The hook callbacks must be plain functions. Providing async functions will throw as it would produce an infinite microtask loop.
* @since v17.1.0, v16.14.0
* @param callbacks The {@link HookCallbacks | Hook Callbacks} to register
* @return Used for disabling hooks
*/
createHook: (callbacks: HookCallbacks) => Function;
}
/**
* The `promiseHooks` interface can be used to track promise lifecycle events.
* @since v17.1.0, v16.14.0
*/
const promiseHooks: PromiseHooks;
type StartupSnapshotCallbackFn = (args: any) => any;
/**
* The `v8.startupSnapshot` interface can be used to add serialization and deserialization hooks for custom startup snapshots.
*
* ```bash
* $ node --snapshot-blob snapshot.blob --build-snapshot entry.js
* # This launches a process with the snapshot
* $ node --snapshot-blob snapshot.blob
* ```
*
* In the example above, `entry.js` can use methods from the `v8.startupSnapshot` interface to specify how to save information for custom objects
* in the snapshot during serialization and how the information can be used to synchronize these objects during deserialization of the snapshot.
* For example, if the `entry.js` contains the following script:
*
* ```js
* 'use strict';
*
* import fs from 'node:fs';
* import zlib from 'node:zlib';
* import path from 'node:path';
* import assert from 'node:assert';
*
* import v8 from 'node:v8';
*
* class BookShelf {
* storage = new Map();
*
* // Reading a series of files from directory and store them into storage.
* constructor(directory, books) {
* for (const book of books) {
* this.storage.set(book, fs.readFileSync(path.join(directory, book)));
* }
* }
*
* static compressAll(shelf) {
* for (const [ book, content ] of shelf.storage) {
* shelf.storage.set(book, zlib.gzipSync(content));
* }
* }
*
* static decompressAll(shelf) {
* for (const [ book, content ] of shelf.storage) {
* shelf.storage.set(book, zlib.gunzipSync(content));
* }
* }
* }
*
* // __dirname here is where the snapshot script is placed
* // during snapshot building time.
* const shelf = new BookShelf(__dirname, [
* 'book1.en_US.txt',
* 'book1.es_ES.txt',
* 'book2.zh_CN.txt',
* ]);
*
* assert(v8.startupSnapshot.isBuildingSnapshot());
* // On snapshot serialization, compress the books to reduce size.
* v8.startupSnapshot.addSerializeCallback(BookShelf.compressAll, shelf);
* // On snapshot deserialization, decompress the books.
* v8.startupSnapshot.addDeserializeCallback(BookShelf.decompressAll, shelf);
* v8.startupSnapshot.setDeserializeMainFunction((shelf) => {
* // process.env and process.argv are refreshed during snapshot
* // deserialization.
* const lang = process.env.BOOK_LANG || 'en_US';
* const book = process.argv[1];
* const name = `${book}.${lang}.txt`;
* console.log(shelf.storage.get(name));
* }, shelf);
* ```
*
* The resulted binary will get print the data deserialized from the snapshot during start up, using the refreshed `process.env` and `process.argv` of the launched process:
*
* ```bash
* $ BOOK_LANG=es_ES node --snapshot-blob snapshot.blob book1
* # Prints content of book1.es_ES.txt deserialized from the snapshot.
* ```
*
* Currently the application deserialized from a user-land snapshot cannot be snapshotted again, so these APIs are only available to applications that are not deserialized from a user-land snapshot.
*
* @since v18.6.0, v16.17.0
*/
namespace startupSnapshot {
/**
* Add a callback that will be called when the Node.js instance is about to get serialized into a snapshot and exit.
* This can be used to release resources that should not or cannot be serialized or to convert user data into a form more suitable for serialization.
* @since v18.6.0, v16.17.0
*/
function addSerializeCallback(callback: StartupSnapshotCallbackFn, data?: any): void;
/**
* Add a callback that will be called when the Node.js instance is deserialized from a snapshot.
* The `callback` and the `data` (if provided) will be serialized into the snapshot, they can be used to re-initialize the state of the application or
* to re-acquire resources that the application needs when the application is restarted from the snapshot.
* @since v18.6.0, v16.17.0
*/
function addDeserializeCallback(callback: StartupSnapshotCallbackFn, data?: any): void;
/**
* This sets the entry point of the Node.js application when it is deserialized from a snapshot. This can be called only once in the snapshot building script.
* If called, the deserialized application no longer needs an additional entry point script to start up and will simply invoke the callback along with the deserialized
* data (if provided), otherwise an entry point script still needs to be provided to the deserialized application.
* @since v18.6.0, v16.17.0
*/
function setDeserializeMainFunction(callback: StartupSnapshotCallbackFn, data?: any): void;
/**
* Returns true if the Node.js instance is run to build a snapshot.
* @since v18.6.0, v16.17.0
*/
function isBuildingSnapshot(): boolean;
}
}
declare module "v8" {
export * from "node:v8";
}

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/**
* **The `node:wasi` module does not currently provide the**
* **comprehensive file system security properties provided by some WASI runtimes.**
* **Full support for secure file system sandboxing may or may not be implemented in**
* **future. In the mean time, do not rely on it to run untrusted code.**
*
* The WASI API provides an implementation of the [WebAssembly System Interface](https://wasi.dev/) specification. WASI gives WebAssembly applications access to the underlying
* operating system via a collection of POSIX-like functions.
*
* ```js
* import { readFile } from 'node:fs/promises';
* import { WASI } from 'node:wasi';
* import { argv, env } from 'node:process';
*
* const wasi = new WASI({
* version: 'preview1',
* args: argv,
* env,
* preopens: {
* '/local': '/some/real/path/that/wasm/can/access',
* },
* });
*
* const wasm = await WebAssembly.compile(
* await readFile(new URL('./demo.wasm', import.meta.url)),
* );
* const instance = await WebAssembly.instantiate(wasm, wasi.getImportObject());
*
* wasi.start(instance);
* ```
*
* To run the above example, create a new WebAssembly text format file named `demo.wat`:
*
* ```text
* (module
* ;; Import the required fd_write WASI function which will write the given io vectors to stdout
* ;; The function signature for fd_write is:
* ;; (File Descriptor, *iovs, iovs_len, nwritten) -> Returns number of bytes written
* (import "wasi_snapshot_preview1" "fd_write" (func $fd_write (param i32 i32 i32 i32) (result i32)))
*
* (memory 1)
* (export "memory" (memory 0))
*
* ;; Write 'hello world\n' to memory at an offset of 8 bytes
* ;; Note the trailing newline which is required for the text to appear
* (data (i32.const 8) "hello world\n")
*
* (func $main (export "_start")
* ;; Creating a new io vector within linear memory
* (i32.store (i32.const 0) (i32.const 8)) ;; iov.iov_base - This is a pointer to the start of the 'hello world\n' string
* (i32.store (i32.const 4) (i32.const 12)) ;; iov.iov_len - The length of the 'hello world\n' string
*
* (call $fd_write
* (i32.const 1) ;; file_descriptor - 1 for stdout
* (i32.const 0) ;; *iovs - The pointer to the iov array, which is stored at memory location 0
* (i32.const 1) ;; iovs_len - We're printing 1 string stored in an iov - so one.
* (i32.const 20) ;; nwritten - A place in memory to store the number of bytes written
* )
* drop ;; Discard the number of bytes written from the top of the stack
* )
* )
* ```
*
* Use [wabt](https://github.com/WebAssembly/wabt) to compile `.wat` to `.wasm`
*
* ```bash
* wat2wasm demo.wat
* ```
* @experimental
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/wasi.js)
*/
declare module "node:wasi" {
interface WASIOptions {
/**
* An array of strings that the WebAssembly application will
* see as command line arguments. The first argument is the virtual path to the
* WASI command itself.
* @default []
*/
args?: readonly string[] | undefined;
/**
* An object similar to `process.env` that the WebAssembly
* application will see as its environment.
* @default {}
*/
env?: object | undefined;
/**
* This object represents the WebAssembly application's
* sandbox directory structure. The string keys of `preopens` are treated as
* directories within the sandbox. The corresponding values in `preopens` are
* the real paths to those directories on the host machine.
*/
preopens?: NodeJS.Dict<string> | undefined;
/**
* By default, when WASI applications call `__wasi_proc_exit()`
* `wasi.start()` will return with the exit code specified rather than terminatng the process.
* Setting this option to `false` will cause the Node.js process to exit with
* the specified exit code instead.
* @default true
*/
returnOnExit?: boolean | undefined;
/**
* The file descriptor used as standard input in the WebAssembly application.
* @default 0
*/
stdin?: number | undefined;
/**
* The file descriptor used as standard output in the WebAssembly application.
* @default 1
*/
stdout?: number | undefined;
/**
* The file descriptor used as standard error in the WebAssembly application.
* @default 2
*/
stderr?: number | undefined;
/**
* The version of WASI requested.
* Currently the only supported versions are `'unstable'` and `'preview1'`. This option is mandatory.
* @since v19.8.0
*/
version: "unstable" | "preview1";
}
interface FinalizeBindingsOptions {
/**
* @default instance.exports.memory
*/
memory?: object | undefined;
}
/**
* The `WASI` class provides the WASI system call API and additional convenience
* methods for working with WASI-based applications. Each `WASI` instance
* represents a distinct environment.
* @since v13.3.0, v12.16.0
*/
class WASI {
constructor(options?: WASIOptions);
/**
* Return an import object that can be passed to `WebAssembly.instantiate()` if no other WASM imports are needed beyond those provided by WASI.
*
* If version `unstable` was passed into the constructor it will return:
*
* ```js
* { wasi_unstable: wasi.wasiImport }
* ```
*
* If version `preview1` was passed into the constructor or no version was specified it will return:
*
* ```js
* { wasi_snapshot_preview1: wasi.wasiImport }
* ```
* @since v19.8.0
*/
getImportObject(): object;
/**
* Attempt to begin execution of `instance` as a WASI command by invoking its `_start()` export. If `instance` does not contain a `_start()` export, or if `instance` contains an `_initialize()`
* export, then an exception is thrown.
*
* `start()` requires that `instance` exports a [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) named `memory`. If
* `instance` does not have a `memory` export an exception is thrown.
*
* If `start()` is called more than once, an exception is thrown.
* @since v13.3.0, v12.16.0
*/
start(instance: object): number; // TODO: avoid DOM dependency until WASM moved to own lib.
/**
* Attempt to initialize `instance` as a WASI reactor by invoking its `_initialize()` export, if it is present. If `instance` contains a `_start()` export, then an exception is thrown.
*
* `initialize()` requires that `instance` exports a [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) named `memory`.
* If `instance` does not have a `memory` export an exception is thrown.
*
* If `initialize()` is called more than once, an exception is thrown.
* @since v14.6.0, v12.19.0
*/
initialize(instance: object): void; // TODO: avoid DOM dependency until WASM moved to own lib.
/**
* Set up WASI host bindings to `instance` without calling `initialize()`
* or `start()`. This method is useful when the WASI module is instantiated in
* child threads for sharing the memory across threads.
*
* `finalizeBindings()` requires that either `instance` exports a
* [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) named `memory` or user specify a
* [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) object in `options.memory`. If the `memory` is invalid
* an exception is thrown.
*
* `start()` and `initialize()` will call `finalizeBindings()` internally.
* If `finalizeBindings()` is called more than once, an exception is thrown.
* @since v24.4.0
*/
finalizeBindings(instance: object, options?: FinalizeBindingsOptions): void;
/**
* `wasiImport` is an object that implements the WASI system call API. This object
* should be passed as the `wasi_snapshot_preview1` import during the instantiation
* of a [`WebAssembly.Instance`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Instance).
* @since v13.3.0, v12.16.0
*/
readonly wasiImport: NodeJS.Dict<any>; // TODO: Narrow to DOM types
}
}
declare module "wasi" {
export * from "node:wasi";
}

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export {};
import { InternalEventTargetEventProperties } from "node:events";
type _AbortController = typeof globalThis extends { onmessage: any } ? {} : AbortController;
interface AbortController {
readonly signal: AbortSignal;
abort(reason?: any): void;
}
interface AbortSignalEventMap {
"abort": Event;
}
type _AbortSignal = typeof globalThis extends { onmessage: any } ? {} : AbortSignal;
interface AbortSignal extends EventTarget, InternalEventTargetEventProperties<AbortSignalEventMap> {
readonly aborted: boolean;
readonly reason: any;
throwIfAborted(): void;
addEventListener<K extends keyof AbortSignalEventMap>(
type: K,
listener: (ev: AbortSignalEventMap[K]) => void,
options?: AddEventListenerOptions | boolean,
): void;
addEventListener(
type: string,
listener: EventListener | EventListenerObject,
options?: AddEventListenerOptions | boolean,
): void;
removeEventListener<K extends keyof AbortSignalEventMap>(
type: K,
listener: (ev: AbortSignalEventMap[K]) => void,
options?: EventListenerOptions | boolean,
): void;
removeEventListener(
type: string,
listener: EventListener | EventListenerObject,
options?: EventListenerOptions | boolean,
): void;
}
declare global {
interface AbortController extends _AbortController {}
var AbortController: typeof globalThis extends { onmessage: any; AbortController: infer T } ? T
: {
prototype: AbortController;
new(): AbortController;
};
interface AbortSignal extends _AbortSignal {}
var AbortSignal: typeof globalThis extends { onmessage: any; AbortSignal: infer T } ? T
: {
prototype: AbortSignal;
new(): AbortSignal;
abort(reason?: any): AbortSignal;
any(signals: AbortSignal[]): AbortSignal;
timeout(milliseconds: number): AbortSignal;
};
}

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export {};
import * as buffer from "node:buffer";
type _Blob = typeof globalThis extends { onmessage: any } ? {} : buffer.Blob;
type _BlobPropertyBag = typeof globalThis extends { onmessage: any } ? {} : buffer.BlobPropertyBag;
type _File = typeof globalThis extends { onmessage: any } ? {} : buffer.File;
type _FilePropertyBag = typeof globalThis extends { onmessage: any } ? {} : buffer.FilePropertyBag;
declare global {
interface Blob extends _Blob {}
var Blob: typeof globalThis extends { onmessage: any; Blob: infer T } ? T : typeof buffer.Blob;
interface BlobPropertyBag extends _BlobPropertyBag {}
interface File extends _File {}
var File: typeof globalThis extends { onmessage: any; File: infer T } ? T : typeof buffer.File;
interface FilePropertyBag extends _FilePropertyBag {}
function atob(data: string): string;
function btoa(data: string): string;
}

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export {};
import * as console from "node:console";
declare global {
interface Console extends console.Console {}
var console: Console;
}

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export {};
import { webcrypto } from "crypto";
type _Crypto = typeof globalThis extends { onmessage: any } ? {} : webcrypto.Crypto;
type _CryptoKey = typeof globalThis extends { onmessage: any } ? {} : webcrypto.CryptoKey;
type _SubtleCrypto = typeof globalThis extends { onmessage: any } ? {} : webcrypto.SubtleCrypto;
declare global {
interface Crypto extends _Crypto {}
var Crypto: typeof globalThis extends { onmessage: any; Crypto: infer T } ? T : {
prototype: webcrypto.Crypto;
new(): webcrypto.Crypto;
};
interface CryptoKey extends _CryptoKey {}
var CryptoKey: typeof globalThis extends { onmessage: any; CryptoKey: infer T } ? T : {
prototype: webcrypto.CryptoKey;
new(): webcrypto.CryptoKey;
};
interface SubtleCrypto extends _SubtleCrypto {}
var SubtleCrypto: typeof globalThis extends { onmessage: any; SubtleCrypto: infer T } ? T : {
prototype: webcrypto.SubtleCrypto;
new(): webcrypto.SubtleCrypto;
supports(
operation: string,
algorithm: webcrypto.AlgorithmIdentifier,
length?: number,
): boolean;
supports(
operation: string,
algorithm: webcrypto.AlgorithmIdentifier,
additionalAlgorithm: webcrypto.AlgorithmIdentifier,
): boolean;
};
var crypto: typeof globalThis extends { onmessage: any; crypto: infer T } ? T : webcrypto.Crypto;
}

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export {};
type _DOMException = typeof globalThis extends { onmessage: any } ? {} : DOMException;
interface DOMException extends Error {
readonly code: number;
readonly message: string;
readonly name: string;
readonly INDEX_SIZE_ERR: 1;
readonly DOMSTRING_SIZE_ERR: 2;
readonly HIERARCHY_REQUEST_ERR: 3;
readonly WRONG_DOCUMENT_ERR: 4;
readonly INVALID_CHARACTER_ERR: 5;
readonly NO_DATA_ALLOWED_ERR: 6;
readonly NO_MODIFICATION_ALLOWED_ERR: 7;
readonly NOT_FOUND_ERR: 8;
readonly NOT_SUPPORTED_ERR: 9;
readonly INUSE_ATTRIBUTE_ERR: 10;
readonly INVALID_STATE_ERR: 11;
readonly SYNTAX_ERR: 12;
readonly INVALID_MODIFICATION_ERR: 13;
readonly NAMESPACE_ERR: 14;
readonly INVALID_ACCESS_ERR: 15;
readonly VALIDATION_ERR: 16;
readonly TYPE_MISMATCH_ERR: 17;
readonly SECURITY_ERR: 18;
readonly NETWORK_ERR: 19;
readonly ABORT_ERR: 20;
readonly URL_MISMATCH_ERR: 21;
readonly QUOTA_EXCEEDED_ERR: 22;
readonly TIMEOUT_ERR: 23;
readonly INVALID_NODE_TYPE_ERR: 24;
readonly DATA_CLONE_ERR: 25;
}
declare global {
interface DOMException extends _DOMException {}
var DOMException: typeof globalThis extends { onmessage: any; DOMException: infer T } ? T
: {
prototype: DOMException;
new(message?: string, name?: string): DOMException;
new(message?: string, options?: { name?: string; cause?: unknown }): DOMException;
readonly INDEX_SIZE_ERR: 1;
readonly DOMSTRING_SIZE_ERR: 2;
readonly HIERARCHY_REQUEST_ERR: 3;
readonly WRONG_DOCUMENT_ERR: 4;
readonly INVALID_CHARACTER_ERR: 5;
readonly NO_DATA_ALLOWED_ERR: 6;
readonly NO_MODIFICATION_ALLOWED_ERR: 7;
readonly NOT_FOUND_ERR: 8;
readonly NOT_SUPPORTED_ERR: 9;
readonly INUSE_ATTRIBUTE_ERR: 10;
readonly INVALID_STATE_ERR: 11;
readonly SYNTAX_ERR: 12;
readonly INVALID_MODIFICATION_ERR: 13;
readonly NAMESPACE_ERR: 14;
readonly INVALID_ACCESS_ERR: 15;
readonly VALIDATION_ERR: 16;
readonly TYPE_MISMATCH_ERR: 17;
readonly SECURITY_ERR: 18;
readonly NETWORK_ERR: 19;
readonly ABORT_ERR: 20;
readonly URL_MISMATCH_ERR: 21;
readonly QUOTA_EXCEEDED_ERR: 22;
readonly TIMEOUT_ERR: 23;
readonly INVALID_NODE_TYPE_ERR: 24;
readonly DATA_CLONE_ERR: 25;
};
}

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export {};
import * as util from "node:util";
declare global {
interface TextDecoder extends util.TextDecoder {}
var TextDecoder: typeof globalThis extends { onmessage: any; TextDecoder: infer T } ? T : typeof util.TextDecoder;
interface TextEncoder extends util.TextEncoder {}
var TextEncoder: typeof globalThis extends { onmessage: any; TextEncoder: infer T } ? T : typeof util.TextEncoder;
}

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export {};
type _AddEventListenerOptions = typeof globalThis extends { onmessage: any } ? {} : AddEventListenerOptions;
interface AddEventListenerOptions extends EventListenerOptions {
once?: boolean;
passive?: boolean;
signal?: AbortSignal;
}
type _CustomEvent<T = any> = typeof globalThis extends { onmessage: any } ? {} : CustomEvent<T>;
interface CustomEvent<T = any> extends Event {
readonly detail: T;
}
interface CustomEventInit<T = any> extends EventInit {
detail?: T;
}
type _Event = typeof globalThis extends { onmessage: any } ? {} : Event;
interface Event {
readonly bubbles: boolean;
cancelBubble: boolean;
readonly cancelable: boolean;
readonly composed: boolean;
readonly currentTarget: EventTarget | null;
readonly defaultPrevented: boolean;
readonly eventPhase: 0 | 2;
readonly isTrusted: boolean;
returnValue: boolean;
readonly srcElement: EventTarget | null;
readonly target: EventTarget | null;
readonly timeStamp: number;
readonly type: string;
composedPath(): [EventTarget?];
initEvent(type: string, bubbles?: boolean, cancelable?: boolean): void;
preventDefault(): void;
stopImmediatePropagation(): void;
stopPropagation(): void;
}
interface EventInit {
bubbles?: boolean;
cancelable?: boolean;
composed?: boolean;
}
type _EventListener = typeof globalThis extends { onmessage: any } ? {} : EventListener;
interface EventListener {
(evt: Event): void;
}
type _EventListenerObject = typeof globalThis extends { onmessage: any } ? {} : EventListenerObject;
interface EventListenerObject {
handleEvent(object: Event): void;
}
type _EventListenerOptions = typeof globalThis extends { onmessage: any } ? {} : EventListenerOptions;
interface EventListenerOptions {
capture?: boolean;
}
type _EventTarget = typeof globalThis extends { onmessage: any } ? {} : EventTarget;
interface EventTarget {
addEventListener(
type: string,
listener: EventListener | EventListenerObject,
options?: AddEventListenerOptions | boolean,
): void;
dispatchEvent(event: Event): boolean;
removeEventListener(
type: string,
listener: EventListener | EventListenerObject,
options?: EventListenerOptions | boolean,
): void;
}
declare global {
interface AddEventListenerOptions extends _AddEventListenerOptions {}
interface CustomEvent<T = any> extends _CustomEvent<T> {}
var CustomEvent: typeof globalThis extends { onmessage: any; CustomEvent: infer T } ? T
: {
prototype: CustomEvent;
new<T>(type: string, eventInitDict?: CustomEventInit<T>): CustomEvent<T>;
};
interface Event extends _Event {}
var Event: typeof globalThis extends { onmessage: any; Event: infer T } ? T
: {
prototype: Event;
new(type: string, eventInitDict?: EventInit): Event;
};
interface EventListener extends _EventListener {}
interface EventListenerObject extends _EventListenerObject {}
interface EventListenerOptions extends _EventListenerOptions {}
interface EventTarget extends _EventTarget {}
var EventTarget: typeof globalThis extends { onmessage: any; EventTarget: infer T } ? T
: {
prototype: EventTarget;
new(): EventTarget;
};
}

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export {};
import * as undici from "undici-types";
type _CloseEvent = typeof globalThis extends { onmessage: any } ? {} : undici.CloseEvent;
type _CloseEventInit = typeof globalThis extends { onmessage: any } ? {} : undici.CloseEventInit;
type _ErrorEvent = typeof globalThis extends { onmessage: any } ? {} : undici.ErrorEvent;
type _ErrorEventInit = typeof globalThis extends { onmessage: any } ? {} : undici.ErrorEventInit;
type _EventSource = typeof globalThis extends { onmessage: any } ? {} : undici.EventSource;
type _EventSourceInit = typeof globalThis extends { onmessage: any } ? {} : undici.EventSourceInit;
type _FormData = typeof globalThis extends { onmessage: any } ? {} : undici.FormData;
type _Headers = typeof globalThis extends { onmessage: any } ? {} : undici.Headers;
type _MessageEvent = typeof globalThis extends { onmessage: any } ? {} : undici.MessageEvent;
type _MessageEventInit = typeof globalThis extends { onmessage: any } ? {} : undici.MessageEventInit;
type _Request = typeof globalThis extends { onmessage: any } ? {} : undici.Request;
type _RequestInit = typeof globalThis extends { onmessage: any } ? {} : undici.RequestInit;
type _Response = typeof globalThis extends { onmessage: any } ? {} : undici.Response;
type _ResponseInit = typeof globalThis extends { onmessage: any } ? {} : undici.ResponseInit;
type _WebSocket = typeof globalThis extends { onmessage: any } ? {} : undici.WebSocket;
type _WebSocketInit = typeof globalThis extends { onmessage: any } ? {} : undici.WebSocketInit;
declare global {
function fetch(
input: string | URL | Request,
init?: RequestInit,
): Promise<Response>;
interface CloseEvent extends _CloseEvent {}
var CloseEvent: typeof globalThis extends { onmessage: any; CloseEvent: infer T } ? T : typeof undici.CloseEvent;
interface CloseEventInit extends _CloseEventInit {}
interface ErrorEvent extends _ErrorEvent {}
var ErrorEvent: typeof globalThis extends { onmessage: any; ErrorEvent: infer T } ? T : typeof undici.ErrorEvent;
interface ErrorEventInit extends _ErrorEventInit {}
interface EventSource extends _EventSource {}
var EventSource: typeof globalThis extends { onmessage: any; EventSource: infer T } ? T : typeof undici.EventSource;
interface EventSourceInit extends _EventSourceInit {}
interface FormData extends _FormData {}
var FormData: typeof globalThis extends { onmessage: any; FormData: infer T } ? T : typeof undici.FormData;
interface Headers extends _Headers {}
var Headers: typeof globalThis extends { onmessage: any; Headers: infer T } ? T : typeof undici.Headers;
interface MessageEvent extends _MessageEvent {}
var MessageEvent: typeof globalThis extends { onmessage: any; MessageEvent: infer T } ? T
: typeof undici.MessageEvent;
interface MessageEventInit extends _MessageEventInit {}
interface Request extends _Request {}
var Request: typeof globalThis extends { onmessage: any; Request: infer T } ? T : typeof undici.Request;
interface RequestInit extends _RequestInit {}
interface Response extends _Response {}
var Response: typeof globalThis extends { onmessage: any; Response: infer T } ? T : typeof undici.Response;
interface ResponseInit extends _ResponseInit {}
interface WebSocket extends _WebSocket {}
var WebSocket: typeof globalThis extends { onmessage: any; WebSocket: infer T } ? T : typeof undici.WebSocket;
interface WebSocketInit extends _WebSocketInit {}
}

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export {};
import { URL } from "node:url";
declare global {
interface ImportMeta {
dirname: string;
filename: string;
main: boolean;
url: string;
resolve(specifier: string, parent?: string | URL): string;
}
}

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export {};
import * as worker_threads from "node:worker_threads";
type _BroadcastChannel = typeof globalThis extends { onmessage: any } ? {} : worker_threads.BroadcastChannel;
type _MessageChannel = typeof globalThis extends { onmessage: any } ? {} : worker_threads.MessageChannel;
type _MessagePort = typeof globalThis extends { onmessage: any } ? {} : worker_threads.MessagePort;
declare global {
function structuredClone<T = any>(value: T, options?: worker_threads.StructuredSerializeOptions): T;
interface BroadcastChannel extends _BroadcastChannel {}
var BroadcastChannel: typeof globalThis extends { onmessage: any; BroadcastChannel: infer T } ? T
: typeof worker_threads.BroadcastChannel;
interface MessageChannel extends _MessageChannel {}
var MessageChannel: typeof globalThis extends { onmessage: any; MessageChannel: infer T } ? T
: typeof worker_threads.MessageChannel;
interface MessagePort extends _MessagePort {}
var MessagePort: typeof globalThis extends { onmessage: any; MessagePort: infer T } ? T
: typeof worker_threads.MessagePort;
}

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export {};
import { LockManager } from "worker_threads";
// lib.webworker has `WorkerNavigator` rather than `Navigator`, so conditionals use `onabort` instead of `onmessage`
type _Navigator = typeof globalThis extends { onabort: any } ? {} : Navigator;
interface Navigator {
readonly hardwareConcurrency: number;
readonly language: string;
readonly languages: readonly string[];
readonly locks: LockManager;
readonly platform: string;
readonly userAgent: string;
}
declare global {
interface Navigator extends _Navigator {}
var Navigator: typeof globalThis extends { onabort: any; Navigator: infer T } ? T : {
prototype: Navigator;
new(): Navigator;
};
// Needs conditional inference for lib.dom and lib.webworker compatibility
var navigator: typeof globalThis extends { onmessage: any; navigator: infer T } ? T : Navigator;
}

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export {};
import * as perf_hooks from "node:perf_hooks";
type _Performance = typeof globalThis extends { onmessage: any } ? {} : perf_hooks.Performance;
type _PerformanceEntry = typeof globalThis extends { onmessage: any } ? {} : perf_hooks.PerformanceEntry;
type _PerformanceMark = typeof globalThis extends { onmessage: any } ? {} : perf_hooks.PerformanceMark;
type _PerformanceMeasure = typeof globalThis extends { onmessage: any } ? {} : perf_hooks.PerformanceMeasure;
type _PerformanceObserver = typeof globalThis extends { onmessage: any } ? {} : perf_hooks.PerformanceObserver;
type _PerformanceObserverEntryList = typeof globalThis extends { onmessage: any } ? {}
: perf_hooks.PerformanceObserverEntryList;
type _PerformanceResourceTiming = typeof globalThis extends { onmessage: any } ? {}
: perf_hooks.PerformanceResourceTiming;
declare global {
interface Performance extends _Performance {}
var Performance: typeof globalThis extends { onmessage: any; Performance: infer T } ? T
: typeof perf_hooks.Performance;
interface PerformanceEntry extends _PerformanceEntry {}
var PerformanceEntry: typeof globalThis extends { onmessage: any; PerformanceEntry: infer T } ? T
: typeof perf_hooks.PerformanceEntry;
interface PerformanceMark extends _PerformanceMark {}
var PerformanceMark: typeof globalThis extends { onmessage: any; PerformanceMark: infer T } ? T
: typeof perf_hooks.PerformanceMark;
interface PerformanceMeasure extends _PerformanceMeasure {}
var PerformanceMeasure: typeof globalThis extends { onmessage: any; PerformanceMeasure: infer T } ? T
: typeof perf_hooks.PerformanceMeasure;
interface PerformanceObserver extends _PerformanceObserver {}
var PerformanceObserver: typeof globalThis extends { onmessage: any; PerformanceObserver: infer T } ? T
: typeof perf_hooks.PerformanceObserver;
interface PerformanceObserverEntryList extends _PerformanceObserverEntryList {}
var PerformanceObserverEntryList: typeof globalThis extends
{ onmessage: any; PerformanceObserverEntryList: infer T } ? T : typeof perf_hooks.PerformanceObserverEntryList;
interface PerformanceResourceTiming extends _PerformanceResourceTiming {}
var PerformanceResourceTiming: typeof globalThis extends { onmessage: any; PerformanceResourceTiming: infer T } ? T
: typeof perf_hooks.PerformanceResourceTiming;
var performance: typeof globalThis extends { onmessage: any; performance: infer T } ? T : perf_hooks.Performance;
}

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export {};
// These interfaces are absent from lib.webworker, so the conditionals use `onabort` rather than `onmessage`
type _Storage = typeof globalThis extends { onabort: any } ? {} : Storage;
interface Storage {
readonly length: number;
clear(): void;
getItem(key: string): string | null;
key(index: number): string | null;
removeItem(key: string): void;
setItem(key: string, value: string): void;
[key: string]: any;
}
declare global {
interface Storage extends _Storage {}
var Storage: typeof globalThis extends { onabort: any; Storage: infer T } ? T : {
prototype: Storage;
new(): Storage;
};
var localStorage: Storage;
var sessionStorage: Storage;
}

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export {};
import * as webstreams from "stream/web";
type _ByteLengthQueuingStrategy = typeof globalThis extends { onmessage: any } ? {}
: webstreams.ByteLengthQueuingStrategy;
type _CompressionStream = typeof globalThis extends { onmessage: any } ? {} : webstreams.CompressionStream;
type _CountQueuingStrategy = typeof globalThis extends { onmessage: any } ? {} : webstreams.CountQueuingStrategy;
type _DecompressionStream = typeof globalThis extends { onmessage: any } ? {} : webstreams.DecompressionStream;
type _QueuingStrategy<T = any> = typeof globalThis extends { onmessage: any } ? {} : webstreams.QueuingStrategy<T>;
type _ReadableByteStreamController = typeof globalThis extends { onmessage: any } ? {}
: webstreams.ReadableByteStreamController;
type _ReadableStream<R = any> = typeof globalThis extends { onmessage: any } ? {} : webstreams.ReadableStream<R>;
type _ReadableStreamBYOBReader = typeof globalThis extends { onmessage: any } ? {}
: webstreams.ReadableStreamBYOBReader;
type _ReadableStreamBYOBRequest = typeof globalThis extends { onmessage: any } ? {}
: webstreams.ReadableStreamBYOBRequest;
type _ReadableStreamDefaultController<R = any> = typeof globalThis extends { onmessage: any } ? {}
: webstreams.ReadableStreamDefaultController<R>;
type _ReadableStreamDefaultReader<R = any> = typeof globalThis extends { onmessage: any } ? {}
: webstreams.ReadableStreamDefaultReader<R>;
type _TextDecoderStream = typeof globalThis extends { onmessage: any } ? {} : webstreams.TextDecoderStream;
type _TextEncoderStream = typeof globalThis extends { onmessage: any } ? {} : webstreams.TextEncoderStream;
type _TransformStream<I = any, O = any> = typeof globalThis extends { onmessage: any } ? {}
: webstreams.TransformStream<I, O>;
type _TransformStreamDefaultController<O = any> = typeof globalThis extends { onmessage: any } ? {}
: webstreams.TransformStreamDefaultController<O>;
type _WritableStream<W = any> = typeof globalThis extends { onmessage: any } ? {} : webstreams.WritableStream<W>;
type _WritableStreamDefaultController = typeof globalThis extends { onmessage: any } ? {}
: webstreams.WritableStreamDefaultController;
type _WritableStreamDefaultWriter<W = any> = typeof globalThis extends { onmessage: any } ? {}
: webstreams.WritableStreamDefaultWriter<W>;
declare global {
interface ByteLengthQueuingStrategy extends _ByteLengthQueuingStrategy {}
var ByteLengthQueuingStrategy: typeof globalThis extends { onmessage: any; ByteLengthQueuingStrategy: infer T } ? T
: typeof webstreams.ByteLengthQueuingStrategy;
interface CompressionStream extends _CompressionStream {}
var CompressionStream: typeof globalThis extends {
onmessage: any;
CompressionStream: infer T;
} ? T
: typeof webstreams.CompressionStream;
interface CountQueuingStrategy extends _CountQueuingStrategy {}
var CountQueuingStrategy: typeof globalThis extends { onmessage: any; CountQueuingStrategy: infer T } ? T
: typeof webstreams.CountQueuingStrategy;
interface DecompressionStream extends _DecompressionStream {}
var DecompressionStream: typeof globalThis extends {
onmessage: any;
DecompressionStream: infer T;
} ? T
: typeof webstreams.DecompressionStream;
interface QueuingStrategy<T = any> extends _QueuingStrategy<T> {}
interface ReadableByteStreamController extends _ReadableByteStreamController {}
var ReadableByteStreamController: typeof globalThis extends
{ onmessage: any; ReadableByteStreamController: infer T } ? T : typeof webstreams.ReadableByteStreamController;
interface ReadableStream<R = any> extends _ReadableStream<R> {}
var ReadableStream: typeof globalThis extends { onmessage: any; ReadableStream: infer T } ? T
: typeof webstreams.ReadableStream;
interface ReadableStreamBYOBReader extends _ReadableStreamBYOBReader {}
var ReadableStreamBYOBReader: typeof globalThis extends { onmessage: any; ReadableStreamBYOBReader: infer T } ? T
: typeof webstreams.ReadableStreamBYOBReader;
interface ReadableStreamBYOBRequest extends _ReadableStreamBYOBRequest {}
var ReadableStreamBYOBRequest: typeof globalThis extends { onmessage: any; ReadableStreamBYOBRequest: infer T } ? T
: typeof webstreams.ReadableStreamBYOBRequest;
interface ReadableStreamDefaultController<R = any> extends _ReadableStreamDefaultController<R> {}
var ReadableStreamDefaultController: typeof globalThis extends
{ onmessage: any; ReadableStreamDefaultController: infer T } ? T
: typeof webstreams.ReadableStreamDefaultController;
interface ReadableStreamDefaultReader<R = any> extends _ReadableStreamDefaultReader<R> {}
var ReadableStreamDefaultReader: typeof globalThis extends { onmessage: any; ReadableStreamDefaultReader: infer T }
? T
: typeof webstreams.ReadableStreamDefaultReader;
interface TextDecoderStream extends _TextDecoderStream {}
var TextDecoderStream: typeof globalThis extends { onmessage: any; TextDecoderStream: infer T } ? T
: typeof webstreams.TextDecoderStream;
interface TextEncoderStream extends _TextEncoderStream {}
var TextEncoderStream: typeof globalThis extends { onmessage: any; TextEncoderStream: infer T } ? T
: typeof webstreams.TextEncoderStream;
interface TransformStream<I = any, O = any> extends _TransformStream<I, O> {}
var TransformStream: typeof globalThis extends { onmessage: any; TransformStream: infer T } ? T
: typeof webstreams.TransformStream;
interface TransformStreamDefaultController<O = any> extends _TransformStreamDefaultController<O> {}
var TransformStreamDefaultController: typeof globalThis extends
{ onmessage: any; TransformStreamDefaultController: infer T } ? T
: typeof webstreams.TransformStreamDefaultController;
interface WritableStream<W = any> extends _WritableStream<W> {}
var WritableStream: typeof globalThis extends { onmessage: any; WritableStream: infer T } ? T
: typeof webstreams.WritableStream;
interface WritableStreamDefaultController extends _WritableStreamDefaultController {}
var WritableStreamDefaultController: typeof globalThis extends
{ onmessage: any; WritableStreamDefaultController: infer T } ? T
: typeof webstreams.WritableStreamDefaultController;
interface WritableStreamDefaultWriter<W = any> extends _WritableStreamDefaultWriter<W> {}
var WritableStreamDefaultWriter: typeof globalThis extends { onmessage: any; WritableStreamDefaultWriter: infer T }
? T
: typeof webstreams.WritableStreamDefaultWriter;
}

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export {};
import * as promises from "node:timers/promises";
// Note: The timer function definitions allow a single void-accepting argument
// to be optional in arguments lists. This allows usage such as
// `new Promise(resolve => setTimeout(resolve, ms))` (#54258)
// eslint-disable-next-line @typescript-eslint/no-invalid-void-type
type MakeVoidParameterOptional<TArgs extends any[]> = [void] extends TArgs ? Partial<TArgs> : TArgs;
declare global {
function setImmediate<TArgs extends any[]>(
callback: (...args: TArgs) => void,
...args: MakeVoidParameterOptional<TArgs>
): NodeJS.Immediate;
namespace setImmediate {
import __promisify__ = promises.setImmediate;
export { __promisify__ };
}
function setInterval<TArgs extends any[]>(
callback: (...args: TArgs) => void,
delay?: number,
...args: MakeVoidParameterOptional<TArgs>
): NodeJS.Timeout;
function setTimeout<TArgs extends any[]>(
callback: (...args: TArgs) => void,
delay?: number,
...args: MakeVoidParameterOptional<TArgs>
): NodeJS.Timeout;
namespace setTimeout {
import __promisify__ = promises.setTimeout;
export { __promisify__ };
}
function clearImmediate(immediate: NodeJS.Immediate | undefined): void;
function clearInterval(timeout: NodeJS.Timeout | string | number | undefined): void;
function clearTimeout(timeout: NodeJS.Timeout | string | number | undefined): void;
function queueMicrotask(callback: () => void): void;
}

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export {};
import * as url from "node:url";
declare global {
interface URL extends url.URL {}
var URL: typeof globalThis extends { onmessage: any; URL: infer T } ? T : typeof url.URL;
interface URLPattern extends url.URLPattern {}
var URLPattern: typeof globalThis extends {
onmessage: any;
scheduler: any; // Must be a var introduced at the same time as URLPattern.
URLPattern: infer T;
} ? T
: typeof url.URLPattern;
interface URLPatternInit extends url.URLPatternInit {}
interface URLPatternResult extends url.URLPatternResult {}
interface URLSearchParams extends url.URLSearchParams {}
var URLSearchParams: typeof globalThis extends { onmessage: any; URLSearchParams: infer T } ? T
: typeof url.URLSearchParams;
}

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/**
* The `node:worker_threads` module enables the use of threads that execute
* JavaScript in parallel. To access it:
*
* ```js
* import worker from 'node:worker_threads';
* ```
*
* Workers (threads) are useful for performing CPU-intensive JavaScript operations.
* They do not help much with I/O-intensive work. The Node.js built-in
* asynchronous I/O operations are more efficient than Workers can be.
*
* Unlike `child_process` or `cluster`, `worker_threads` can share memory. They do
* so by transferring `ArrayBuffer` instances or sharing `SharedArrayBuffer` instances.
*
* ```js
* import {
* Worker,
* isMainThread,
* parentPort,
* workerData,
* } from 'node:worker_threads';
*
* if (!isMainThread) {
* const { parse } = await import('some-js-parsing-library');
* const script = workerData;
* parentPort.postMessage(parse(script));
* }
*
* export default function parseJSAsync(script) {
* return new Promise((resolve, reject) => {
* const worker = new Worker(new URL(import.meta.url), {
* workerData: script,
* });
* worker.on('message', resolve);
* worker.once('error', reject);
* worker.once('exit', (code) => {
* if (code !== 0)
* reject(new Error(`Worker stopped with exit code ${code}`));
* });
* });
* };
* ```
*
* The above example spawns a Worker thread for each `parseJSAsync()` call. In
* practice, use a pool of Workers for these kinds of tasks. Otherwise, the
* overhead of creating Workers would likely exceed their benefit.
*
* When implementing a worker pool, use the `AsyncResource` API to inform
* diagnostic tools (e.g. to provide asynchronous stack traces) about the
* correlation between tasks and their outcomes. See `"Using AsyncResource for a Worker thread pool"` in the `async_hooks` documentation for an example implementation.
*
* Worker threads inherit non-process-specific options by default. Refer to `Worker constructor options` to know how to customize worker thread options,
* specifically `argv` and `execArgv` options.
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/worker_threads.js)
*/
declare module "node:worker_threads" {
import {
EventEmitter,
InternalEventEmitter,
InternalEventTargetEventProperties,
NodeEventTarget,
} from "node:events";
import { FileHandle } from "node:fs/promises";
import { Performance } from "node:perf_hooks";
import { Readable, Writable } from "node:stream";
import { ReadableStream, TransformStream, WritableStream } from "node:stream/web";
import { URL } from "node:url";
import { CPUProfileHandle, HeapInfo, HeapProfileHandle } from "node:v8";
import { Context } from "node:vm";
import { MessageEvent } from "undici-types";
const isInternalThread: boolean;
const isMainThread: boolean;
const parentPort: null | MessagePort;
const resourceLimits: ResourceLimits;
const SHARE_ENV: unique symbol;
const threadId: number;
const threadName: string | null;
const workerData: any;
interface WorkerPerformance extends Pick<Performance, "eventLoopUtilization"> {}
/** @deprecated Use `import { Transferable } from "node:worker_threads"` instead. */
// TODO: remove in a future major @types/node version.
type TransferListItem = Transferable;
interface WorkerOptions {
/**
* List of arguments which would be stringified and appended to
* `process.argv` in the worker. This is mostly similar to the `workerData`
* but the values will be available on the global `process.argv` as if they
* were passed as CLI options to the script.
*/
argv?: any[] | undefined;
env?: NodeJS.Dict<string> | typeof SHARE_ENV | undefined;
eval?: boolean | undefined;
workerData?: any;
stdin?: boolean | undefined;
stdout?: boolean | undefined;
stderr?: boolean | undefined;
execArgv?: string[] | undefined;
resourceLimits?: ResourceLimits | undefined;
/**
* Additional data to send in the first worker message.
*/
transferList?: Transferable[] | undefined;
/**
* @default true
*/
trackUnmanagedFds?: boolean | undefined;
/**
* An optional `name` to be appended to the worker title
* for debugging/identification purposes, making the final title as
* `[worker ${id}] ${name}`.
*/
name?: string | undefined;
}
interface ResourceLimits {
/**
* The maximum size of a heap space for recently created objects.
*/
maxYoungGenerationSizeMb?: number | undefined;
/**
* The maximum size of the main heap in MB.
*/
maxOldGenerationSizeMb?: number | undefined;
/**
* The size of a pre-allocated memory range used for generated code.
*/
codeRangeSizeMb?: number | undefined;
/**
* The default maximum stack size for the thread. Small values may lead to unusable Worker instances.
* @default 4
*/
stackSizeMb?: number | undefined;
}
interface WorkerEventMap {
"error": [err: unknown];
"exit": [exitCode: number];
"message": [value: any];
"messageerror": [error: Error];
"online": [];
}
/**
* The `Worker` class represents an independent JavaScript execution thread.
* Most Node.js APIs are available inside of it.
*
* Notable differences inside a Worker environment are:
*
* * The `process.stdin`, `process.stdout`, and `process.stderr` streams may be redirected by the parent thread.
* * The `import { isMainThread } from 'node:worker_threads'` variable is set to `false`.
* * The `import { parentPort } from 'node:worker_threads'` message port is available.
* * `process.exit()` does not stop the whole program, just the single thread,
* and `process.abort()` is not available.
* * `process.chdir()` and `process` methods that set group or user ids
* are not available.
* * `process.env` is a copy of the parent thread's environment variables,
* unless otherwise specified. Changes to one copy are not visible in other
* threads, and are not visible to native add-ons (unless `worker.SHARE_ENV` is passed as the `env` option to the `Worker` constructor). On Windows, unlike the main thread, a copy of the
* environment variables operates in a case-sensitive manner.
* * `process.title` cannot be modified.
* * Signals are not delivered through `process.on('...')`.
* * Execution may stop at any point as a result of `worker.terminate()` being invoked.
* * IPC channels from parent processes are not accessible.
* * The `trace_events` module is not supported.
* * Native add-ons can only be loaded from multiple threads if they fulfill `certain conditions`.
*
* Creating `Worker` instances inside of other `Worker`s is possible.
*
* Like [Web Workers](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API) and the `node:cluster module`, two-way communication
* can be achieved through inter-thread message passing. Internally, a `Worker` has
* a built-in pair of `MessagePort` s that are already associated with each
* other when the `Worker` is created. While the `MessagePort` object on the parent
* side is not directly exposed, its functionalities are exposed through `worker.postMessage()` and the `worker.on('message')` event
* on the `Worker` object for the parent thread.
*
* To create custom messaging channels (which is encouraged over using the default
* global channel because it facilitates separation of concerns), users can create
* a `MessageChannel` object on either thread and pass one of the`MessagePort`s on that `MessageChannel` to the other thread through a
* pre-existing channel, such as the global one.
*
* See `port.postMessage()` for more information on how messages are passed,
* and what kind of JavaScript values can be successfully transported through
* the thread barrier.
*
* ```js
* import assert from 'node:assert';
* import {
* Worker, MessageChannel, MessagePort, isMainThread, parentPort,
* } from 'node:worker_threads';
* if (isMainThread) {
* const worker = new Worker(__filename);
* const subChannel = new MessageChannel();
* worker.postMessage({ hereIsYourPort: subChannel.port1 }, [subChannel.port1]);
* subChannel.port2.on('message', (value) => {
* console.log('received:', value);
* });
* } else {
* parentPort.once('message', (value) => {
* assert(value.hereIsYourPort instanceof MessagePort);
* value.hereIsYourPort.postMessage('the worker is sending this');
* value.hereIsYourPort.close();
* });
* }
* ```
* @since v10.5.0
*/
class Worker implements EventEmitter {
/**
* If `stdin: true` was passed to the `Worker` constructor, this is a
* writable stream. The data written to this stream will be made available in
* the worker thread as `process.stdin`.
* @since v10.5.0
*/
readonly stdin: Writable | null;
/**
* This is a readable stream which contains data written to `process.stdout` inside the worker thread. If `stdout: true` was not passed to the `Worker` constructor, then data is piped to the
* parent thread's `process.stdout` stream.
* @since v10.5.0
*/
readonly stdout: Readable;
/**
* This is a readable stream which contains data written to `process.stderr` inside the worker thread. If `stderr: true` was not passed to the `Worker` constructor, then data is piped to the
* parent thread's `process.stderr` stream.
* @since v10.5.0
*/
readonly stderr: Readable;
/**
* An integer identifier for the referenced thread. Inside the worker thread,
* it is available as `import { threadId } from 'node:worker_threads'`.
* This value is unique for each `Worker` instance inside a single process.
* @since v10.5.0
*/
readonly threadId: number;
/**
* A string identifier for the referenced thread or null if the thread is not running.
* Inside the worker thread, it is available as `require('node:worker_threads').threadName`.
* @since v24.6.0
*/
readonly threadName: string | null;
/**
* Provides the set of JS engine resource constraints for this Worker thread.
* If the `resourceLimits` option was passed to the `Worker` constructor,
* this matches its values.
*
* If the worker has stopped, the return value is an empty object.
* @since v13.2.0, v12.16.0
*/
readonly resourceLimits?: ResourceLimits | undefined;
/**
* An object that can be used to query performance information from a worker
* instance. Similar to `perf_hooks.performance`.
* @since v15.1.0, v14.17.0, v12.22.0
*/
readonly performance: WorkerPerformance;
/**
* @param filename The path to the Worker’s main script or module.
* Must be either an absolute path or a relative path (i.e. relative to the current working directory) starting with ./ or ../,
* or a WHATWG URL object using file: protocol. If options.eval is true, this is a string containing JavaScript code rather than a path.
*/
constructor(filename: string | URL, options?: WorkerOptions);
/**
* Send a message to the worker that is received via `require('node:worker_threads').parentPort.on('message')`.
* See `port.postMessage()` for more details.
* @since v10.5.0
*/
postMessage(value: any, transferList?: readonly Transferable[]): void;
/**
* Opposite of `unref()`, calling `ref()` on a previously `unref()`ed worker does _not_ let the program exit if it's the only active handle left (the default
* behavior). If the worker is `ref()`ed, calling `ref()` again has
* no effect.
* @since v10.5.0
*/
ref(): void;
/**
* Calling `unref()` on a worker allows the thread to exit if this is the only
* active handle in the event system. If the worker is already `unref()`ed calling `unref()` again has no effect.
* @since v10.5.0
*/
unref(): void;
/**
* Stop all JavaScript execution in the worker thread as soon as possible.
* Returns a Promise for the exit code that is fulfilled when the `'exit' event` is emitted.
* @since v10.5.0
*/
terminate(): Promise<number>;
/**
* This method returns a `Promise` that will resolve to an object identical to `process.threadCpuUsage()`,
* or reject with an `ERR_WORKER_NOT_RUNNING` error if the worker is no longer running.
* This methods allows the statistics to be observed from outside the actual thread.
* @since v24.6.0
*/
cpuUsage(prev?: NodeJS.CpuUsage): Promise<NodeJS.CpuUsage>;
/**
* Returns a readable stream for a V8 snapshot of the current state of the Worker.
* See `v8.getHeapSnapshot()` for more details.
*
* If the Worker thread is no longer running, which may occur before the `'exit' event` is emitted, the returned `Promise` is rejected
* immediately with an `ERR_WORKER_NOT_RUNNING` error.
* @since v13.9.0, v12.17.0
* @return A promise for a Readable Stream containing a V8 heap snapshot
*/
getHeapSnapshot(): Promise<Readable>;
/**
* This method returns a `Promise` that will resolve to an object identical to `v8.getHeapStatistics()`,
* or reject with an `ERR_WORKER_NOT_RUNNING` error if the worker is no longer running.
* This methods allows the statistics to be observed from outside the actual thread.
* @since v24.0.0
*/
getHeapStatistics(): Promise<HeapInfo>;
/**
* Starting a CPU profile then return a Promise that fulfills with an error
* or an `CPUProfileHandle` object. This API supports `await using` syntax.
*
* ```js
* const { Worker } = require('node:worker_threads');
*
* const worker = new Worker(`
* const { parentPort } = require('worker_threads');
* parentPort.on('message', () => {});
* `, { eval: true });
*
* worker.on('online', async () => {
* const handle = await worker.startCpuProfile();
* const profile = await handle.stop();
* console.log(profile);
* worker.terminate();
* });
* ```
*
* `await using` example.
*
* ```js
* const { Worker } = require('node:worker_threads');
*
* const w = new Worker(`
* const { parentPort } = require('node:worker_threads');
* parentPort.on('message', () => {});
* `, { eval: true });
*
* w.on('online', async () => {
* // Stop profile automatically when return and profile will be discarded
* await using handle = await w.startCpuProfile();
* });
* ```
* @since v24.8.0
*/
startCpuProfile(): Promise<CPUProfileHandle>;
/**
* Starting a Heap profile then return a Promise that fulfills with an error
* or an `HeapProfileHandle` object. This API supports `await using` syntax.
*
* ```js
* const { Worker } = require('node:worker_threads');
*
* const worker = new Worker(`
* const { parentPort } = require('worker_threads');
* parentPort.on('message', () => {});
* `, { eval: true });
*
* worker.on('online', async () => {
* const handle = await worker.startHeapProfile();
* const profile = await handle.stop();
* console.log(profile);
* worker.terminate();
* });
* ```
*
* `await using` example.
*
* ```js
* const { Worker } = require('node:worker_threads');
*
* const w = new Worker(`
* const { parentPort } = require('node:worker_threads');
* parentPort.on('message', () => {});
* `, { eval: true });
*
* w.on('online', async () => {
* // Stop profile automatically when return and profile will be discarded
* await using handle = await w.startHeapProfile();
* });
* ```
*/
startHeapProfile(): Promise<HeapProfileHandle>;
/**
* Calls `worker.terminate()` when the dispose scope is exited.
*
* ```js
* async function example() {
* await using worker = new Worker('for (;;) {}', { eval: true });
* // Worker is automatically terminate when the scope is exited.
* }
* ```
* @since v24.2.0
*/
[Symbol.asyncDispose](): Promise<void>;
}
interface Worker extends InternalEventEmitter<WorkerEventMap> {}
/**
* Mark an object as not transferable. If `object` occurs in the transfer list of
* a `port.postMessage()` call, it is ignored.
*
* In particular, this makes sense for objects that can be cloned, rather than
* transferred, and which are used by other objects on the sending side.
* For example, Node.js marks the `ArrayBuffer`s it uses for its `Buffer pool` with this.
*
* This operation cannot be undone.
*
* ```js
* import { MessageChannel, markAsUntransferable } from 'node:worker_threads';
*
* const pooledBuffer = new ArrayBuffer(8);
* const typedArray1 = new Uint8Array(pooledBuffer);
* const typedArray2 = new Float64Array(pooledBuffer);
*
* markAsUntransferable(pooledBuffer);
*
* const { port1 } = new MessageChannel();
* port1.postMessage(typedArray1, [ typedArray1.buffer ]);
*
* // The following line prints the contents of typedArray1 -- it still owns
* // its memory and has been cloned, not transferred. Without
* // `markAsUntransferable()`, this would print an empty Uint8Array.
* // typedArray2 is intact as well.
* console.log(typedArray1);
* console.log(typedArray2);
* ```
*
* There is no equivalent to this API in browsers.
* @since v14.5.0, v12.19.0
*/
function markAsUntransferable(object: object): void;
/**
* Check if an object is marked as not transferable with
* {@link markAsUntransferable}.
* @since v21.0.0
*/
function isMarkedAsUntransferable(object: object): boolean;
/**
* Mark an object as not cloneable. If `object` is used as `message` in
* a `port.postMessage()` call, an error is thrown. This is a no-op if `object` is a
* primitive value.
*
* This has no effect on `ArrayBuffer`, or any `Buffer` like objects.
*
* This operation cannot be undone.
*
* ```js
* const { markAsUncloneable } = require('node:worker_threads');
*
* const anyObject = { foo: 'bar' };
* markAsUncloneable(anyObject);
* const { port1 } = new MessageChannel();
* try {
* // This will throw an error, because anyObject is not cloneable.
* port1.postMessage(anyObject)
* } catch (error) {
* // error.name === 'DataCloneError'
* }
* ```
*
* There is no equivalent to this API in browsers.
* @since v22.10.0
*/
function markAsUncloneable(object: object): void;
/**
* Transfer a `MessagePort` to a different `vm` Context. The original `port` object is rendered unusable, and the returned `MessagePort` instance
* takes its place.
*
* The returned `MessagePort` is an object in the target context and
* inherits from its global `Object` class. Objects passed to the [`port.onmessage()`](https://developer.mozilla.org/en-US/docs/Web/API/MessagePort/onmessage) listener are also created in the
* target context
* and inherit from its global `Object` class.
*
* However, the created `MessagePort` no longer inherits from [`EventTarget`](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget), and only
* [`port.onmessage()`](https://developer.mozilla.org/en-US/docs/Web/API/MessagePort/onmessage) can be used to receive
* events using it.
* @since v11.13.0
* @param port The message port to transfer.
* @param contextifiedSandbox A `contextified` object as returned by the `vm.createContext()` method.
*/
function moveMessagePortToContext(port: MessagePort, contextifiedSandbox: Context): MessagePort;
/**
* Receive a single message from a given `MessagePort`. If no message is available,`undefined` is returned, otherwise an object with a single `message` property
* that contains the message payload, corresponding to the oldest message in the `MessagePort`'s queue.
*
* ```js
* import { MessageChannel, receiveMessageOnPort } from 'node:worker_threads';
* const { port1, port2 } = new MessageChannel();
* port1.postMessage({ hello: 'world' });
*
* console.log(receiveMessageOnPort(port2));
* // Prints: { message: { hello: 'world' } }
* console.log(receiveMessageOnPort(port2));
* // Prints: undefined
* ```
*
* When this function is used, no `'message'` event is emitted and the `onmessage` listener is not invoked.
* @since v12.3.0
*/
function receiveMessageOnPort(port: MessagePort):
| {
message: any;
}
| undefined;
type Serializable = string | object | number | boolean | bigint;
/**
* Within a worker thread, `worker.getEnvironmentData()` returns a clone
* of data passed to the spawning thread's `worker.setEnvironmentData()`.
* Every new `Worker` receives its own copy of the environment data
* automatically.
*
* ```js
* import {
* Worker,
* isMainThread,
* setEnvironmentData,
* getEnvironmentData,
* } from 'node:worker_threads';
*
* if (isMainThread) {
* setEnvironmentData('Hello', 'World!');
* const worker = new Worker(__filename);
* } else {
* console.log(getEnvironmentData('Hello')); // Prints 'World!'.
* }
* ```
* @since v15.12.0, v14.18.0
* @param key Any arbitrary, cloneable JavaScript value that can be used as a {Map} key.
*/
function getEnvironmentData(key: Serializable): Serializable;
/**
* The `worker.setEnvironmentData()` API sets the content of `worker.getEnvironmentData()` in the current thread and all new `Worker` instances spawned from the current context.
* @since v15.12.0, v14.18.0
* @param key Any arbitrary, cloneable JavaScript value that can be used as a {Map} key.
* @param value Any arbitrary, cloneable JavaScript value that will be cloned and passed automatically to all new `Worker` instances. If `value` is passed as `undefined`, any previously set value
* for the `key` will be deleted.
*/
function setEnvironmentData(key: Serializable, value?: Serializable): void;
/**
* Sends a value to another worker, identified by its thread ID.
* @param threadId The target thread ID. If the thread ID is invalid, a `ERR_WORKER_MESSAGING_FAILED` error will be thrown.
* If the target thread ID is the current thread ID, a `ERR_WORKER_MESSAGING_SAME_THREAD` error will be thrown.
* @param value The value to send.
* @param transferList If one or more `MessagePort`-like objects are passed in value, a `transferList` is required for those items
* or `ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST` is thrown. See `port.postMessage()` for more information.
* @param timeout Time to wait for the message to be delivered in milliseconds. By default it's `undefined`, which means wait forever.
* If the operation times out, a `ERR_WORKER_MESSAGING_TIMEOUT` error is thrown.
* @since v22.5.0
*/
function postMessageToThread(threadId: number, value: any, timeout?: number): Promise<void>;
function postMessageToThread(
threadId: number,
value: any,
transferList: readonly Transferable[],
timeout?: number,
): Promise<void>;
// #region web types
type LockMode = "exclusive" | "shared";
type Transferable =
| ArrayBuffer
| MessagePort
| AbortSignal
| FileHandle
| ReadableStream
| WritableStream
| TransformStream;
interface LockGrantedCallback<T> {
(lock: Lock | null): T;
}
interface LockInfo {
clientId: string;
mode: LockMode;
name: string;
}
interface LockManagerSnapshot {
held: LockInfo[];
pending: LockInfo[];
}
interface LockOptions {
ifAvailable?: boolean;
mode?: LockMode;
signal?: AbortSignal;
steal?: boolean;
}
interface StructuredSerializeOptions {
transfer?: Transferable[];
}
interface BroadcastChannelEventMap {
"message": MessageEvent;
"messageerror": MessageEvent;
}
interface BroadcastChannel
extends EventTarget, InternalEventTargetEventProperties<BroadcastChannelEventMap>, NodeJS.RefCounted
{
readonly name: string;
close(): void;
postMessage(message: any): void;
addEventListener<K extends keyof BroadcastChannelEventMap>(
type: K,
listener: (ev: BroadcastChannelEventMap[K]) => void,
options?: AddEventListenerOptions | boolean,
): void;
addEventListener(
type: string,
listener: EventListener | EventListenerObject,
options?: AddEventListenerOptions | boolean,
): void;
removeEventListener<K extends keyof BroadcastChannelEventMap>(
type: K,
listener: (ev: BroadcastChannelEventMap[K]) => void,
options?: EventListenerOptions | boolean,
): void;
removeEventListener(
type: string,
listener: EventListener | EventListenerObject,
options?: EventListenerOptions | boolean,
): void;
}
var BroadcastChannel: {
prototype: BroadcastChannel;
new(name: string): BroadcastChannel;
};
interface Lock {
readonly mode: LockMode;
readonly name: string;
}
// var Lock: {
// prototype: Lock;
// new(): Lock;
// };
interface LockManager {
query(): Promise<LockManagerSnapshot>;
request<T>(name: string, callback: LockGrantedCallback<T>): Promise<Awaited<T>>;
request<T>(name: string, options: LockOptions, callback: LockGrantedCallback<T>): Promise<Awaited<T>>;
}
// var LockManager: {
// prototype: LockManager;
// new(): LockManager;
// };
interface MessageChannel {
readonly port1: MessagePort;
readonly port2: MessagePort;
}
var MessageChannel: {
prototype: MessageChannel;
new(): MessageChannel;
};
interface MessagePortEventMap {
"close": Event;
"message": MessageEvent;
"messageerror": MessageEvent;
}
interface MessagePort extends NodeEventTarget, InternalEventTargetEventProperties<MessagePortEventMap> {
close(): void;
postMessage(message: any, transfer: Transferable[]): void;
postMessage(message: any, options?: StructuredSerializeOptions): void;
start(): void;
hasRef(): boolean;
ref(): void;
unref(): void;
addEventListener<K extends keyof MessagePortEventMap>(
type: K,
listener: (ev: MessagePortEventMap[K]) => void,
options?: AddEventListenerOptions | boolean,
): void;
addEventListener(
type: string,
listener: EventListener | EventListenerObject,
options?: AddEventListenerOptions | boolean,
): void;
removeEventListener<K extends keyof MessagePortEventMap>(
type: K,
listener: (ev: MessagePortEventMap[K]) => void,
options?: EventListenerOptions | boolean,
): void;
removeEventListener(
type: string,
listener: EventListener | EventListenerObject,
options?: EventListenerOptions | boolean,
): void;
// #region NodeEventTarget
addListener(event: "close", listener: (ev: Event) => void): this;
addListener(event: "message", listener: (value: any) => void): this;
addListener(event: "messageerror", listener: (error: Error) => void): this;
addListener(event: string, listener: (arg: any) => void): this;
emit(event: "close", ev: Event): boolean;
emit(event: "message", value: any): boolean;
emit(event: "messageerror", error: Error): boolean;
emit(event: string, arg: any): boolean;
off(event: "close", listener: (ev: Event) => void, options?: EventListenerOptions): this;
off(event: "message", listener: (value: any) => void, options?: EventListenerOptions): this;
off(event: "messageerror", listener: (error: Error) => void, options?: EventListenerOptions): this;
off(event: string, listener: (arg: any) => void, options?: EventListenerOptions): this;
on(event: "close", listener: (ev: Event) => void): this;
on(event: "message", listener: (value: any) => void): this;
on(event: "messageerror", listener: (error: Error) => void): this;
on(event: string, listener: (arg: any) => void): this;
once(event: "close", listener: (ev: Event) => void): this;
once(event: "message", listener: (value: any) => void): this;
once(event: "messageerror", listener: (error: Error) => void): this;
once(event: string, listener: (arg: any) => void): this;
removeListener(event: "close", listener: (ev: Event) => void, options?: EventListenerOptions): this;
removeListener(event: "message", listener: (value: any) => void, options?: EventListenerOptions): this;
removeListener(event: "messageerror", listener: (error: Error) => void, options?: EventListenerOptions): this;
removeListener(event: string, listener: (arg: any) => void, options?: EventListenerOptions): this;
// #endregion
}
var MessagePort: {
prototype: MessagePort;
new(): MessagePort;
};
var locks: LockManager;
export import structuredClone = globalThis.structuredClone;
// #endregion
}
declare module "worker_threads" {
export * from "node:worker_threads";
}

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back/node_modules/@types/node/zlib.d.ts generated vendored Normal file
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@ -0,0 +1,682 @@
/**
* The `node:zlib` module provides compression functionality implemented using
* Gzip, Deflate/Inflate, and Brotli.
*
* To access it:
*
* ```js
* import zlib from 'node:zlib';
* ```
*
* Compression and decompression are built around the Node.js
* [Streams API](https://nodejs.org/docs/latest-v25.x/api/stream.html).
*
* Compressing or decompressing a stream (such as a file) can be accomplished by
* piping the source stream through a `zlib` `Transform` stream into a destination
* stream:
*
* ```js
* import { createGzip } from 'node:zlib';
* import { pipeline } from 'node:stream';
* import {
* createReadStream,
* createWriteStream,
* } from 'node:fs';
*
* const gzip = createGzip();
* const source = createReadStream('input.txt');
* const destination = createWriteStream('input.txt.gz');
*
* pipeline(source, gzip, destination, (err) => {
* if (err) {
* console.error('An error occurred:', err);
* process.exitCode = 1;
* }
* });
*
* // Or, Promisified
*
* import { promisify } from 'node:util';
* const pipe = promisify(pipeline);
*
* async function do_gzip(input, output) {
* const gzip = createGzip();
* const source = createReadStream(input);
* const destination = createWriteStream(output);
* await pipe(source, gzip, destination);
* }
*
* do_gzip('input.txt', 'input.txt.gz')
* .catch((err) => {
* console.error('An error occurred:', err);
* process.exitCode = 1;
* });
* ```
*
* It is also possible to compress or decompress data in a single step:
*
* ```js
* import { deflate, unzip } from 'node:zlib';
*
* const input = '.................................';
* deflate(input, (err, buffer) => {
* if (err) {
* console.error('An error occurred:', err);
* process.exitCode = 1;
* }
* console.log(buffer.toString('base64'));
* });
*
* const buffer = Buffer.from('eJzT0yMAAGTvBe8=', 'base64');
* unzip(buffer, (err, buffer) => {
* if (err) {
* console.error('An error occurred:', err);
* process.exitCode = 1;
* }
* console.log(buffer.toString());
* });
*
* // Or, Promisified
*
* import { promisify } from 'node:util';
* const do_unzip = promisify(unzip);
*
* do_unzip(buffer)
* .then((buf) => console.log(buf.toString()))
* .catch((err) => {
* console.error('An error occurred:', err);
* process.exitCode = 1;
* });
* ```
* @since v0.5.8
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/zlib.js)
*/
declare module "node:zlib" {
import { NonSharedBuffer } from "node:buffer";
import * as stream from "node:stream";
interface ZlibOptions {
/**
* @default constants.Z_NO_FLUSH
*/
flush?: number | undefined;
/**
* @default constants.Z_FINISH
*/
finishFlush?: number | undefined;
/**
* @default 16*1024
*/
chunkSize?: number | undefined;
windowBits?: number | undefined;
/** compression only */
level?: number | undefined;
/** compression only */
memLevel?: number | undefined;
/** compression only */
strategy?: number | undefined;
/** deflate/inflate only, empty dictionary by default */
dictionary?: NodeJS.ArrayBufferView | ArrayBuffer | undefined;
/**
* If `true`, returns an object with `buffer` and `engine`.
*/
info?: boolean | undefined;
/**
* Limits output size when using convenience methods.
* @default buffer.kMaxLength
*/
maxOutputLength?: number | undefined;
}
interface BrotliOptions {
/**
* @default constants.BROTLI_OPERATION_PROCESS
*/
flush?: number | undefined;
/**
* @default constants.BROTLI_OPERATION_FINISH
*/
finishFlush?: number | undefined;
/**
* @default 16*1024
*/
chunkSize?: number | undefined;
params?:
| {
/**
* Each key is a `constants.BROTLI_*` constant.
*/
[key: number]: boolean | number;
}
| undefined;
/**
* Limits output size when using [convenience methods](https://nodejs.org/docs/latest-v25.x/api/zlib.html#convenience-methods).
* @default buffer.kMaxLength
*/
maxOutputLength?: number | undefined;
/**
* If `true`, returns an object with `buffer` and `engine`.
*/
info?: boolean | undefined;
}
interface ZstdOptions {
/**
* @default constants.ZSTD_e_continue
*/
flush?: number | undefined;
/**
* @default constants.ZSTD_e_end
*/
finishFlush?: number | undefined;
/**
* @default 16 * 1024
*/
chunkSize?: number | undefined;
/**
* Key-value object containing indexed
* [Zstd parameters](https://nodejs.org/docs/latest-v25.x/api/zlib.html#zstd-constants).
*/
params?: { [key: number]: number | boolean } | undefined;
/**
* Limits output size when using
* [convenience methods](https://nodejs.org/docs/latest-v25.x/api/zlib.html#convenience-methods).
* @default buffer.kMaxLength
*/
maxOutputLength?: number | undefined;
/**
* If `true`, returns an object with `buffer` and `engine`.
*/
info?: boolean | undefined;
/**
* Optional dictionary used to improve compression efficiency when compressing or decompressing data that
* shares common patterns with the dictionary.
* @since v24.6.0
*/
dictionary?: NodeJS.ArrayBufferView | undefined;
}
interface Zlib {
readonly bytesWritten: number;
shell?: boolean | string | undefined;
close(callback?: () => void): void;
flush(kind?: number, callback?: () => void): void;
flush(callback?: () => void): void;
}
interface ZlibParams {
params(level: number, strategy: number, callback: () => void): void;
}
interface ZlibReset {
reset(): void;
}
/**
* @since v10.16.0
*/
class BrotliCompress extends stream.Transform {
constructor(options?: BrotliOptions);
}
interface BrotliCompress extends stream.Transform, Zlib {}
/**
* @since v10.16.0
*/
class BrotliDecompress extends stream.Transform {
constructor(options?: BrotliOptions);
}
interface BrotliDecompress extends stream.Transform, Zlib {}
/**
* @since v0.5.8
*/
class Gzip extends stream.Transform {
constructor(options?: ZlibOptions);
}
interface Gzip extends stream.Transform, Zlib {}
/**
* @since v0.5.8
*/
class Gunzip extends stream.Transform {
constructor(options?: ZlibOptions);
}
interface Gunzip extends stream.Transform, Zlib {}
/**
* @since v0.5.8
*/
class Deflate extends stream.Transform {
constructor(options?: ZlibOptions);
}
interface Deflate extends stream.Transform, Zlib, ZlibReset, ZlibParams {}
/**
* @since v0.5.8
*/
class Inflate extends stream.Transform {
constructor(options?: ZlibOptions);
}
interface Inflate extends stream.Transform, Zlib, ZlibReset {}
/**
* @since v0.5.8
*/
class DeflateRaw extends stream.Transform {
constructor(options?: ZlibOptions);
}
interface DeflateRaw extends stream.Transform, Zlib, ZlibReset, ZlibParams {}
/**
* @since v0.5.8
*/
class InflateRaw extends stream.Transform {
constructor(options?: ZlibOptions);
}
interface InflateRaw extends stream.Transform, Zlib, ZlibReset {}
/**
* @since v0.5.8
*/
class Unzip extends stream.Transform {
constructor(options?: ZlibOptions);
}
interface Unzip extends stream.Transform, Zlib {}
/**
* @since v22.15.0
* @experimental
*/
class ZstdCompress extends stream.Transform {
constructor(options?: ZstdOptions);
}
interface ZstdCompress extends stream.Transform, Zlib {}
/**
* @since v22.15.0
* @experimental
*/
class ZstdDecompress extends stream.Transform {
constructor(options?: ZstdOptions);
}
interface ZstdDecompress extends stream.Transform, Zlib {}
/**
* Computes a 32-bit [Cyclic Redundancy Check](https://en.wikipedia.org/wiki/Cyclic_redundancy_check) checksum of `data`.
* If `value` is specified, it is used as the starting value of the checksum, otherwise, 0 is used as the starting value.
* @param data When `data` is a string, it will be encoded as UTF-8 before being used for computation.
* @param value An optional starting value. It must be a 32-bit unsigned integer. @default 0
* @returns A 32-bit unsigned integer containing the checksum.
* @since v22.2.0
*/
function crc32(data: string | NodeJS.ArrayBufferView, value?: number): number;
/**
* Creates and returns a new `BrotliCompress` object.
* @since v11.7.0, v10.16.0
*/
function createBrotliCompress(options?: BrotliOptions): BrotliCompress;
/**
* Creates and returns a new `BrotliDecompress` object.
* @since v11.7.0, v10.16.0
*/
function createBrotliDecompress(options?: BrotliOptions): BrotliDecompress;
/**
* Creates and returns a new `Gzip` object.
* See `example`.
* @since v0.5.8
*/
function createGzip(options?: ZlibOptions): Gzip;
/**
* Creates and returns a new `Gunzip` object.
* @since v0.5.8
*/
function createGunzip(options?: ZlibOptions): Gunzip;
/**
* Creates and returns a new `Deflate` object.
* @since v0.5.8
*/
function createDeflate(options?: ZlibOptions): Deflate;
/**
* Creates and returns a new `Inflate` object.
* @since v0.5.8
*/
function createInflate(options?: ZlibOptions): Inflate;
/**
* Creates and returns a new `DeflateRaw` object.
*
* An upgrade of zlib from 1.2.8 to 1.2.11 changed behavior when `windowBits` is set to 8 for raw deflate streams. zlib would automatically set `windowBits` to 9 if was initially set to 8. Newer
* versions of zlib will throw an exception,
* so Node.js restored the original behavior of upgrading a value of 8 to 9,
* since passing `windowBits = 9` to zlib actually results in a compressed stream
* that effectively uses an 8-bit window only.
* @since v0.5.8
*/
function createDeflateRaw(options?: ZlibOptions): DeflateRaw;
/**
* Creates and returns a new `InflateRaw` object.
* @since v0.5.8
*/
function createInflateRaw(options?: ZlibOptions): InflateRaw;
/**
* Creates and returns a new `Unzip` object.
* @since v0.5.8
*/
function createUnzip(options?: ZlibOptions): Unzip;
/**
* Creates and returns a new `ZstdCompress` object.
* @since v22.15.0
*/
function createZstdCompress(options?: ZstdOptions): ZstdCompress;
/**
* Creates and returns a new `ZstdDecompress` object.
* @since v22.15.0
*/
function createZstdDecompress(options?: ZstdOptions): ZstdDecompress;
type InputType = string | ArrayBuffer | NodeJS.ArrayBufferView;
type CompressCallback = (error: Error | null, result: NonSharedBuffer) => void;
/**
* @since v11.7.0, v10.16.0
*/
function brotliCompress(buf: InputType, options: BrotliOptions, callback: CompressCallback): void;
function brotliCompress(buf: InputType, callback: CompressCallback): void;
namespace brotliCompress {
function __promisify__(buffer: InputType, options?: BrotliOptions): Promise<NonSharedBuffer>;
}
/**
* Compress a chunk of data with `BrotliCompress`.
* @since v11.7.0, v10.16.0
*/
function brotliCompressSync(buf: InputType, options?: BrotliOptions): NonSharedBuffer;
/**
* @since v11.7.0, v10.16.0
*/
function brotliDecompress(buf: InputType, options: BrotliOptions, callback: CompressCallback): void;
function brotliDecompress(buf: InputType, callback: CompressCallback): void;
namespace brotliDecompress {
function __promisify__(buffer: InputType, options?: BrotliOptions): Promise<NonSharedBuffer>;
}
/**
* Decompress a chunk of data with `BrotliDecompress`.
* @since v11.7.0, v10.16.0
*/
function brotliDecompressSync(buf: InputType, options?: BrotliOptions): NonSharedBuffer;
/**
* @since v0.6.0
*/
function deflate(buf: InputType, callback: CompressCallback): void;
function deflate(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
namespace deflate {
function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
}
/**
* Compress a chunk of data with `Deflate`.
* @since v0.11.12
*/
function deflateSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
/**
* @since v0.6.0
*/
function deflateRaw(buf: InputType, callback: CompressCallback): void;
function deflateRaw(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
namespace deflateRaw {
function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
}
/**
* Compress a chunk of data with `DeflateRaw`.
* @since v0.11.12
*/
function deflateRawSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
/**
* @since v0.6.0
*/
function gzip(buf: InputType, callback: CompressCallback): void;
function gzip(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
namespace gzip {
function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
}
/**
* Compress a chunk of data with `Gzip`.
* @since v0.11.12
*/
function gzipSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
/**
* @since v0.6.0
*/
function gunzip(buf: InputType, callback: CompressCallback): void;
function gunzip(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
namespace gunzip {
function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
}
/**
* Decompress a chunk of data with `Gunzip`.
* @since v0.11.12
*/
function gunzipSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
/**
* @since v0.6.0
*/
function inflate(buf: InputType, callback: CompressCallback): void;
function inflate(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
namespace inflate {
function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
}
/**
* Decompress a chunk of data with `Inflate`.
* @since v0.11.12
*/
function inflateSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
/**
* @since v0.6.0
*/
function inflateRaw(buf: InputType, callback: CompressCallback): void;
function inflateRaw(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
namespace inflateRaw {
function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
}
/**
* Decompress a chunk of data with `InflateRaw`.
* @since v0.11.12
*/
function inflateRawSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
/**
* @since v0.6.0
*/
function unzip(buf: InputType, callback: CompressCallback): void;
function unzip(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
namespace unzip {
function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
}
/**
* Decompress a chunk of data with `Unzip`.
* @since v0.11.12
*/
function unzipSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
/**
* @since v22.15.0
* @experimental
*/
function zstdCompress(buf: InputType, callback: CompressCallback): void;
function zstdCompress(buf: InputType, options: ZstdOptions, callback: CompressCallback): void;
namespace zstdCompress {
function __promisify__(buffer: InputType, options?: ZstdOptions): Promise<NonSharedBuffer>;
}
/**
* Compress a chunk of data with `ZstdCompress`.
* @since v22.15.0
* @experimental
*/
function zstdCompressSync(buf: InputType, options?: ZstdOptions): NonSharedBuffer;
/**
* @since v22.15.0
* @experimental
*/
function zstdDecompress(buf: InputType, callback: CompressCallback): void;
function zstdDecompress(buf: InputType, options: ZstdOptions, callback: CompressCallback): void;
namespace zstdDecompress {
function __promisify__(buffer: InputType, options?: ZstdOptions): Promise<NonSharedBuffer>;
}
/**
* Decompress a chunk of data with `ZstdDecompress`.
* @since v22.15.0
* @experimental
*/
function zstdDecompressSync(buf: InputType, options?: ZstdOptions): NonSharedBuffer;
namespace constants {
const BROTLI_DECODE: number;
const BROTLI_DECODER_ERROR_ALLOC_BLOCK_TYPE_TREES: number;
const BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MAP: number;
const BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MODES: number;
const BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_1: number;
const BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2: number;
const BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS: number;
const BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET: number;
const BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_1: number;
const BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_2: number;
const BROTLI_DECODER_ERROR_FORMAT_CL_SPACE: number;
const BROTLI_DECODER_ERROR_FORMAT_CONTEXT_MAP_REPEAT: number;
const BROTLI_DECODER_ERROR_FORMAT_DICTIONARY: number;
const BROTLI_DECODER_ERROR_FORMAT_DISTANCE: number;
const BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE: number;
const BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE: number;
const BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE: number;
const BROTLI_DECODER_ERROR_FORMAT_PADDING_1: number;
const BROTLI_DECODER_ERROR_FORMAT_PADDING_2: number;
const BROTLI_DECODER_ERROR_FORMAT_RESERVED: number;
const BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET: number;
const BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME: number;
const BROTLI_DECODER_ERROR_FORMAT_TRANSFORM: number;
const BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS: number;
const BROTLI_DECODER_ERROR_INVALID_ARGUMENTS: number;
const BROTLI_DECODER_ERROR_UNREACHABLE: number;
const BROTLI_DECODER_NEEDS_MORE_INPUT: number;
const BROTLI_DECODER_NEEDS_MORE_OUTPUT: number;
const BROTLI_DECODER_NO_ERROR: number;
const BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION: number;
const BROTLI_DECODER_PARAM_LARGE_WINDOW: number;
const BROTLI_DECODER_RESULT_ERROR: number;
const BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT: number;
const BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT: number;
const BROTLI_DECODER_RESULT_SUCCESS: number;
const BROTLI_DECODER_SUCCESS: number;
const BROTLI_DEFAULT_MODE: number;
const BROTLI_DEFAULT_QUALITY: number;
const BROTLI_DEFAULT_WINDOW: number;
const BROTLI_ENCODE: number;
const BROTLI_LARGE_MAX_WINDOW_BITS: number;
const BROTLI_MAX_INPUT_BLOCK_BITS: number;
const BROTLI_MAX_QUALITY: number;
const BROTLI_MAX_WINDOW_BITS: number;
const BROTLI_MIN_INPUT_BLOCK_BITS: number;
const BROTLI_MIN_QUALITY: number;
const BROTLI_MIN_WINDOW_BITS: number;
const BROTLI_MODE_FONT: number;
const BROTLI_MODE_GENERIC: number;
const BROTLI_MODE_TEXT: number;
const BROTLI_OPERATION_EMIT_METADATA: number;
const BROTLI_OPERATION_FINISH: number;
const BROTLI_OPERATION_FLUSH: number;
const BROTLI_OPERATION_PROCESS: number;
const BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING: number;
const BROTLI_PARAM_LARGE_WINDOW: number;
const BROTLI_PARAM_LGBLOCK: number;
const BROTLI_PARAM_LGWIN: number;
const BROTLI_PARAM_MODE: number;
const BROTLI_PARAM_NDIRECT: number;
const BROTLI_PARAM_NPOSTFIX: number;
const BROTLI_PARAM_QUALITY: number;
const BROTLI_PARAM_SIZE_HINT: number;
const DEFLATE: number;
const DEFLATERAW: number;
const GUNZIP: number;
const GZIP: number;
const INFLATE: number;
const INFLATERAW: number;
const UNZIP: number;
const ZLIB_VERNUM: number;
const ZSTD_CLEVEL_DEFAULT: number;
const ZSTD_COMPRESS: number;
const ZSTD_DECOMPRESS: number;
const ZSTD_btlazy2: number;
const ZSTD_btopt: number;
const ZSTD_btultra: number;
const ZSTD_btultra2: number;
const ZSTD_c_chainLog: number;
const ZSTD_c_checksumFlag: number;
const ZSTD_c_compressionLevel: number;
const ZSTD_c_contentSizeFlag: number;
const ZSTD_c_dictIDFlag: number;
const ZSTD_c_enableLongDistanceMatching: number;
const ZSTD_c_hashLog: number;
const ZSTD_c_jobSize: number;
const ZSTD_c_ldmBucketSizeLog: number;
const ZSTD_c_ldmHashLog: number;
const ZSTD_c_ldmHashRateLog: number;
const ZSTD_c_ldmMinMatch: number;
const ZSTD_c_minMatch: number;
const ZSTD_c_nbWorkers: number;
const ZSTD_c_overlapLog: number;
const ZSTD_c_searchLog: number;
const ZSTD_c_strategy: number;
const ZSTD_c_targetLength: number;
const ZSTD_c_windowLog: number;
const ZSTD_d_windowLogMax: number;
const ZSTD_dfast: number;
const ZSTD_e_continue: number;
const ZSTD_e_end: number;
const ZSTD_e_flush: number;
const ZSTD_error_GENERIC: number;
const ZSTD_error_checksum_wrong: number;
const ZSTD_error_corruption_detected: number;
const ZSTD_error_dictionaryCreation_failed: number;
const ZSTD_error_dictionary_corrupted: number;
const ZSTD_error_dictionary_wrong: number;
const ZSTD_error_dstBuffer_null: number;
const ZSTD_error_dstSize_tooSmall: number;
const ZSTD_error_frameParameter_unsupported: number;
const ZSTD_error_frameParameter_windowTooLarge: number;
const ZSTD_error_init_missing: number;
const ZSTD_error_literals_headerWrong: number;
const ZSTD_error_maxSymbolValue_tooLarge: number;
const ZSTD_error_maxSymbolValue_tooSmall: number;
const ZSTD_error_memory_allocation: number;
const ZSTD_error_noForwardProgress_destFull: number;
const ZSTD_error_noForwardProgress_inputEmpty: number;
const ZSTD_error_no_error: number;
const ZSTD_error_parameter_combination_unsupported: number;
const ZSTD_error_parameter_outOfBound: number;
const ZSTD_error_parameter_unsupported: number;
const ZSTD_error_prefix_unknown: number;
const ZSTD_error_srcSize_wrong: number;
const ZSTD_error_stabilityCondition_notRespected: number;
const ZSTD_error_stage_wrong: number;
const ZSTD_error_tableLog_tooLarge: number;
const ZSTD_error_version_unsupported: number;
const ZSTD_error_workSpace_tooSmall: number;
const ZSTD_fast: number;
const ZSTD_greedy: number;
const ZSTD_lazy: number;
const ZSTD_lazy2: number;
const Z_BEST_COMPRESSION: number;
const Z_BEST_SPEED: number;
const Z_BLOCK: number;
const Z_BUF_ERROR: number;
const Z_DATA_ERROR: number;
const Z_DEFAULT_CHUNK: number;
const Z_DEFAULT_COMPRESSION: number;
const Z_DEFAULT_LEVEL: number;
const Z_DEFAULT_MEMLEVEL: number;
const Z_DEFAULT_STRATEGY: number;
const Z_DEFAULT_WINDOWBITS: number;
const Z_ERRNO: number;
const Z_FILTERED: number;
const Z_FINISH: number;
const Z_FIXED: number;
const Z_FULL_FLUSH: number;
const Z_HUFFMAN_ONLY: number;
const Z_MAX_CHUNK: number;
const Z_MAX_LEVEL: number;
const Z_MAX_MEMLEVEL: number;
const Z_MAX_WINDOWBITS: number;
const Z_MEM_ERROR: number;
const Z_MIN_CHUNK: number;
const Z_MIN_LEVEL: number;
const Z_MIN_MEMLEVEL: number;
const Z_MIN_WINDOWBITS: number;
const Z_NEED_DICT: number;
const Z_NO_COMPRESSION: number;
const Z_NO_FLUSH: number;
const Z_OK: number;
const Z_PARTIAL_FLUSH: number;
const Z_RLE: number;
const Z_STREAM_END: number;
const Z_STREAM_ERROR: number;
const Z_SYNC_FLUSH: number;
const Z_VERSION_ERROR: number;
}
}
declare module "zlib" {
export * from "node:zlib";
}

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Copyright (c) 2024 Andrey Sidorov, Douglas Wilson, Weslley Araújo and contributors.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# AWS SSL Profiles
[**AWS RDS**](https://aws.amazon.com/rds/) **SSL** Certificates Bundles.
**Table of Contents**
- [Installation](#installation)
- [Usage](#usage)
- [**mysqljs/mysql**](#mysqljsmysql)
- [**MySQL2**](#mysql2)
- [**node-postgres**](#node-postgres)
- [Custom `ssl` options](#custom-ssl-options)
- [License](#license)
- [Security](#security)
- [Contributing](#contributing)
- [Acknowledgements](#acknowledgements)
---
## Installation
```bash
npm install --save aws-ssl-profiles
```
---
## Usage
### [mysqljs/mysql](https://github.com/mysqljs/mysql)
```js
const mysql = require('mysql');
const awsCaBundle = require('aws-ssl-profiles');
// mysql connection
const connection = mysql.createConnection({
//...
ssl: awsCaBundle,
});
// mysql connection pool
const pool = mysql.createPool({
//...
ssl: awsCaBundle,
});
```
### [MySQL2](https://github.com/sidorares/node-mysql2)
```js
const mysql = require('mysql2');
const awsCaBundle = require('aws-ssl-profiles');
// mysql2 connection
const connection = mysql.createConnection({
//...
ssl: awsCaBundle,
});
// mysql2 connection pool
const pool = mysql.createPool({
//...
ssl: awsCaBundle,
});
```
### [node-postgres](https://github.com/brianc/node-postgres)
```js
const pg = require('pg');
const awsCaBundle = require('aws-ssl-profiles');
// pg connection
const client = new pg.Client({
// ...
ssl: awsCaBundle,
});
// pg connection pool
const pool = new pg.Pool({
// ...
ssl: awsCaBundle,
});
```
### Custom `ssl` options
Using **AWS SSL Profiles** with custom `ssl` options:
```js
{
// ...
ssl: {
...awsCaBundle,
rejectUnauthorized: true,
// ...
}
}
```
```js
{
// ...
ssl: {
ca: awsCaBundle.ca,
rejectUnauthorized: true,
// ...
}
}
```
### Custom bundles
```js
const { proxyBundle } = require('aws-ssl-profiles');
{
// ...
ssl: proxyBundle,
}
```
---
## License
**AWS SSL Profiles** is under the [**MIT License**](./LICENSE).
---
## Security
Please check the [**SECURITY.md**](./SECURITY.md).
---
## Contributing
Please check the [**CONTRIBUTING.md**](./CONTRIBUTING.md) for instructions.
---
## Acknowledgements
[**Contributors**](https://github.com/mysqljs/aws-ssl-profiles/graphs/contributors).

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export type CA = string[];
export type Profiles = {
ca: CA;
};

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });

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import type { Profiles } from "./@types/profiles.js";
export declare const proxyBundle: Profiles;
declare const profiles: Profiles;
declare module "aws-ssl-profiles" {
const profiles: Profiles & { proxyBundle: Profiles };
export = profiles;
}
export default profiles;

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const defaults_js_1 = require("./profiles/ca/defaults.js");
const proxies_js_1 = require("./profiles/ca/proxies.js");
const proxyBundle = {
ca: proxies_js_1.proxies,
};
const profiles = {
ca: [...defaults_js_1.defaults, ...proxies_js_1.proxies],
};
module.exports = profiles;
module.exports.proxyBundle = proxyBundle;
module.exports.default = profiles;

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import type { CA } from '../../@types/profiles.js';
/**
* CA Certificates for **Amazon RDS** (2024)
*
* - https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/UsingWithRDS.SSL.html
* - https://docs.amazonaws.cn/en_us/AmazonRDS/latest/AuroraUserGuide/UsingWithRDS.SSL.html
* - https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/aurora-serverless.html#aurora-serverless.tls
*/
export declare const defaults: CA;

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import type { CA } from '../../@types/profiles.js';
/**
* CA Certificates for **Amazon RDS Proxy** (2024)
*
* - https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/rds-proxy.howitworks.html#rds-proxy-security.tls
* - https://www.amazontrust.com/repository/
*/
export declare const proxies: CA;

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