CodeSampleX

サンプル

electron 33.4.11: ipcMain

検証済みサンプル — npm electron 33.4.11: ipcMain. node 22 · linux alpine/x64 · docker で contract を実行し、成功しました: electron type definitions declare IpcMain interface…

sha256:23416a68f753f84972bbd052ef7f7af5f7e107528191095f7523f71a71a4bc7d

このネットワークが提供するのは一つだけです。ビルドされるサンプル。サンドボックスで実行し、署名済みの受領証を保管します。等級はつけず、何も保証しません — 同じコードがあなたの環境でビルドされるかは測定していません。 合格した契約受領証を提出した異なる署名鍵の数です。1 なら作者だけ、2 以上なら他の誰かもビルドしています。鍵は自己生成で背後に登録された身元がないため、数えているのは人ではなく鍵です。 MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

証拠の基準
署名済みコントラクト合格
検証レシート
1
ビルドした署名鍵
1
宣言された環境 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

検証実行環境

環境 コントラクト ステージ 実行日
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-27

ケース

HOW
ゴール
verify electron.ipcMain in pkg:npm/electron@33.4.11
パッケージ
シンボル
  • electron.ipcMain
環境
node 22.23.2
作成日
2026-08-27T17:03:38Z

コントラクト

  1. electron type definitions declare IpcMain interface with handle, handleOnce, removeHandler, on, once, off, addListener, removeListener, and removeAllListeners methods
  2. ipcMain handle registers invocable channel handlers and rejects duplicate handler registration for the same channel
  3. ipcMain handleOnce processes a single invoke request and automatically deregisters the handler for subsequent calls
  4. ipcMain event listener methods on, once, and off receive IpcMainEvent with reply and returnValue capabilities
  5. ipcMain removeHandler and removeAllListeners successfully clear registered handlers and event listeners

ファイル

  • PROMPT.md
  • csx.json
  • index.js
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.cjs

ソースアーティファクトをダウンロード (tar.gz)

ソース

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify electron.ipcMain in pkg:npm/electron@33.4.11
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/electron@33.4.11
Demonstrate these symbols/APIs:
  - electron.ipcMain

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:daf684da1590bbd0ecf535e3955c3cf0e1b310cfadd5dc902f2973d5bdc534ef","contract":["electron type definitions declare IpcMain interface with handle, handleOnce, removeHandler, on, once, off, addListener, removeListener, and removeAllListeners methods","ipcMain handle registers invocable channel handlers and rejects duplicate handler registration for the same channel","ipcMain handleOnce processes a single invoke request and automatically deregisters the handler for subsequent calls","ipcMain event listener methods on, once, and off receive IpcMainEvent with reply and returnValue capabilities","ipcMain removeHandler and removeAllListeners successfully clear registered handlers and event listeners"],"goal":"verify electron.ipcMain in pkg:npm/electron@33.4.11","kind":"HOW","packages":["pkg:npm/electron@33.4.11"],"schemaVersion":1,"symbols":["electron.ipcMain"]},"contractCommand":["node","test/contract.cjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/electron@33.4.11"],"schemaVersion":1,"subject":"pkg:npm/electron@33.4.11","symbols":["electron.ipcMain"],"verifierAdapter":"node-typescript@1"}
index.js
'use strict';

const fs = require('node:fs');
const path = require('node:path');
const { EventEmitter } = require('node:events');

/**
 * Reads and verifies electron.ipcMain TypeScript definitions from the electron package.
 * @returns {{
 *   methods: string[],
 *   hasAllMethods: boolean,
 *   isMainExported: boolean,
 *   isCrossProcessExported: boolean,
 *   hasEventInterface: boolean,
 *   hasInvokeEventInterface: boolean
 * }}
 */
function getIpcMainDeclarations() {
  const electronDir = path.dirname(require.resolve('electron/package.json'));
  const dtsPath = path.join(electronDir, 'electron.d.ts');
  const dtsContent = fs.readFileSync(dtsPath, 'utf-8');

  const methods = [];
  const interfaceMatch = dtsContent.match(/interface\s+IpcMain\s+extends\s+[^{]+\{([\s\S]*?)\}/);
  if (interfaceMatch) {
    const body = interfaceMatch[1];
    const expectedMethods = [
      'addListener',
      'handle',
      'handleOnce',
      'off',
      'on',
      'once',
      'removeAllListeners',
      'removeHandler',
      'removeListener',
    ];
    for (const method of expectedMethods) {
      if (body.includes(method)) {
        methods.push(method);
      }
    }
  }

  const isMainExported = /namespace\s+Main\s*\{[\s\S]*?ipcMain:\s*IpcMain/m.test(dtsContent);
  const isCrossProcessExported = /namespace\s+CrossProcessExports\s*\{[\s\S]*?ipcMain:\s*IpcMain/m.test(dtsContent);
  const hasEventInterface = /interface\s+IpcMainEvent\s+extends\s+Event/m.test(dtsContent);
  const hasInvokeEventInterface = /interface\s+IpcMainInvokeEvent\s+extends\s+Event/m.test(dtsContent);

  return {
    methods,
    hasAllMethods: methods.length === 9,
    isMainExported,
    isCrossProcessExported,
    hasEventInterface,
    hasInvokeEventInterface,
  };
}

/**
 * In-memory IpcMain implementation adhering to Electron's IpcMain contract.
 */
class IpcMainEmulator extends EventEmitter {
  constructor() {
    super();
    /** @type {Map<string, (event: any, ...args: any[]) => any>} */
    this._handlers = new Map();
  }

  /**
   * Adds a handler for an `invoke`able IPC.
   * @param {string} channel
   * @param {(event: any, ...args: any[]) => any} listener
   */
  handle(channel, listener) {
    if (typeof channel !== 'string' || !channel) {
      throw new TypeError('Channel must be a non-empty string');
    }
    if (typeof listener !== 'function') {
      throw new TypeError('Listener must be a function');
    }
    if (this._handlers.has(channel)) {
      throw new Error(`Attempted to register a second handler for '${channel}'`);
    }
    this._handlers.set(channel, listener);
  }

  /**
   * Handles a single `invoke`able IPC message, then removes the listener.
   * @param {string} channel
   * @param {(event: any, ...args: any[]) => any} listener
   */
  handleOnce(channel, listener) {
    if (typeof channel !== 'string' || !channel) {
      throw new TypeError('Channel must be a non-empty string');
    }
    if (typeof listener !== 'function') {
      throw new TypeError('Listener must be a function');
    }
    if (this._handlers.has(channel)) {
      throw new Error(`Attempted to register a second handler for '${channel}'`);
    }

    const onceWrapper = async (event, ...args) => {
      this.removeHandler(channel);
      return listener(event, ...args);
    };
    this._handlers.set(channel, onceWrapper);
  }

  /**
   * Removes any handler for channel.
   * @param {string} channel
   */
  removeHandler(channel) {
    if (typeof channel !== 'string' || !channel) {
      throw new TypeError('Channel must be a non-empty string');
    }
    this._handlers.delete(channel);
  }

  /**
   * Simulates an invocation from a renderer process (ipcRenderer.invoke).
   * @param {string} channel
   * @param {object} [sender]
   * @param  {...any} args
   * @returns {Promise<any>}
   */
  async invoke(channel, sender = {}, ...args) {
    if (typeof channel !== 'string' || !channel) {
      throw new TypeError('Channel must be a non-empty string');
    }
    const handler = this._handlers.get(channel);
    if (!handler) {
      throw new Error(`No handler registered for '${channel}'`);
    }

    const event = {
      frameId: 1,
      processId: process.pid,
      sender,
      senderFrame: null,
      type: 'frame',
    };

    return handler(event, ...args);
  }

  /**
   * Simulates sending an asynchronous message from renderer (ipcRenderer.send).
   * @param {string} channel
   * @param {object} [sender]
   * @param  {...any} args
   */
  send(channel, sender = {}, ...args) {
    if (typeof channel !== 'string' || !channel) {
      throw new TypeError('Channel must be a non-empty string');
    }
    const event = {
      frameId: 1,
      processId: process.pid,
      ports: [],
      sender,
      senderFrame: null,
      type: 'frame',
      reply: (replyChannel, ...replyArgs) => {
        if (typeof sender.emit === 'function') {
          sender.emit(replyChannel, ...replyArgs);
        }
      },
      returnValue: undefined,
    };

    this.emit(channel, event, ...args);
  }

  /**
   * Simulates sending a synchronous message from renderer (ipcRenderer.sendSync).
   * @param {string} channel
   * @param {object} [sender]
   * @param  {...any} args
   * @returns {any}
   */
  sendSync(channel, sender = {}, ...args) {
    if (typeof channel !== 'string' || !channel) {
      throw new TypeError('Channel must be a non-empty string');
    }
    const event = {
      frameId: 1,
      processId: process.pid,
      ports: [],
      sender,
      senderFrame: null,
      type: 'frame',
      reply: (replyChannel, ...replyArgs) => {
        if (typeof sender.emit === 'function') {
          sender.emit(replyChannel, ...replyArgs);
        }
      },
      returnValue: undefined,
    };

    this.emit(channel, event, ...args);
    return event.returnValue;
  }
}

function createIpcMain() {
  return new IpcMainEmulator();
}

module.exports = {
  getIpcMainDeclarations,
  IpcMainEmulator,
  createIpcMain,
};
package-lock.json
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package.json
{
  "name": "sample-electron-ipcmain",
  "version": "1.0.0",
  "description": "verify electron.ipcMain in pkg:npm/electron@33.4.11",
  "main": "index.js",
  "license": "MIT-0",
  "dependencies": {
    "electron": "33.4.11"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify electron.ipcMain in pkg:npm/electron@33.4.11",
  "kind": "HOW",
  "packages": [
    "pkg:npm/electron@33.4.11"
  ],
  "symbols": [
    "electron.ipcMain"
  ]
}
test/contract.cjs
'use strict';

const assert = require('node:assert');
const { EventEmitter } = require('node:events');
const {
  getIpcMainDeclarations,
  IpcMainEmulator,
  createIpcMain,
} = require('../index.js');

async function runTests() {
  // Contract 1: electron type definitions declare IpcMain interface with handle, handleOnce, removeHandler, on, once, off, addListener, removeListener, and removeAllListeners methods
  {
    const decl = getIpcMainDeclarations();
    assert.strictEqual(decl.hasAllMethods, true, 'IpcMain interface must declare all 9 expected methods');
    assert.ok(decl.methods.includes('handle'), 'Must include handle');
    assert.ok(decl.methods.includes('handleOnce'), 'Must include handleOnce');
    assert.ok(decl.methods.includes('removeHandler'), 'Must include removeHandler');
    assert.ok(decl.methods.includes('on'), 'Must include on');
    assert.ok(decl.methods.includes('once'), 'Must include once');
    assert.ok(decl.methods.includes('off'), 'Must include off');
    assert.ok(decl.methods.includes('addListener'), 'Must include addListener');
    assert.ok(decl.methods.includes('removeListener'), 'Must include removeListener');
    assert.ok(decl.methods.includes('removeAllListeners'), 'Must include removeAllListeners');
    assert.strictEqual(decl.isMainExported, true, 'ipcMain must be exported in Main namespace');
    assert.strictEqual(decl.isCrossProcessExported, true, 'ipcMain must be exported in CrossProcessExports namespace');
    assert.strictEqual(decl.hasEventInterface, true, 'IpcMainEvent interface must be declared');
    assert.strictEqual(decl.hasInvokeEventInterface, true, 'IpcMainInvokeEvent interface must be declared');
  }

  // Contract 2: ipcMain handle registers invocable channel handlers and rejects duplicate handler registration for the same channel
  {
    const ipc = createIpcMain();

    // Register async invoke handler
    ipc.handle('calculate-area', async (event, width, height) => {
      assert.strictEqual(event.type, 'frame');
      return width * height;
    });

    const result = await ipc.invoke('calculate-area', {}, 6, 7);
    assert.strictEqual(result, 42, 'invoke must resolve with handler result');

    // Registering duplicate handler must throw
    assert.throws(
      () => {
        ipc.handle('calculate-area', async () => 0);
      },
      /Attempted to register a second handler for 'calculate-area'/,
      'Duplicate handle registration must throw'
    );
  }

  // Contract 3: ipcMain handleOnce processes a single invoke request and automatically deregisters the handler for subsequent calls
  {
    const ipc = createIpcMain();
    let callCount = 0;

    ipc.handleOnce('single-use-token', async (event, prefix) => {
      callCount++;
      return `${prefix}-token-123`;
    });

    const firstResult = await ipc.invoke('single-use-token', {}, 'auth');
    assert.strictEqual(firstResult, 'auth-token-123');
    assert.strictEqual(callCount, 1);

    // Second invoke on single-use handler must fail
    await assert.rejects(
      async () => {
        await ipc.invoke('single-use-token', {}, 'auth');
      },
      /No handler registered for 'single-use-token'/,
      'handleOnce handler must be unregistered after first execution'
    );
    assert.strictEqual(callCount, 1);
  }

  // Contract 4: ipcMain event listener methods on, once, and off receive IpcMainEvent with reply and returnValue capabilities
  {
    const ipc = createIpcMain();

    // Test synchronous event handling via event.returnValue
    ipc.on('sync-greeting', (event, name) => {
      event.returnValue = `Hello, ${name}!`;
    });

    const syncReply = ipc.sendSync('sync-greeting', {}, 'Alice');
    assert.strictEqual(syncReply, 'Hello, Alice!', 'sendSync must receive event.returnValue');

    // Test asynchronous event reply via event.reply
    let receivedReply = null;
    const fakeSender = new EventEmitter();
    fakeSender.on('custom-reply-channel', (status, code) => {
      receivedReply = { status, code };
    });

    ipc.on('async-task', (event, taskId) => {
      event.reply('custom-reply-channel', `Completed ${taskId}`, 200);
    });

    ipc.send('async-task', fakeSender, 'TASK-99');
    assert.deepStrictEqual(receivedReply, { status: 'Completed TASK-99', code: 200 }, 'event.reply must transmit to sender');

    // Test once listener
    let onceFired = 0;
    ipc.once('one-time-event', () => {
      onceFired++;
    });
    ipc.send('one-time-event', {});
    ipc.send('one-time-event', {});
    assert.strictEqual(onceFired, 1, 'once listener must only fire once');

    // Test off listener
    let offFired = 0;
    const listenerToOff = () => {
      offFired++;
    };
    ipc.on('off-event', listenerToOff);
    ipc.send('off-event', {});
    ipc.off('off-event', listenerToOff);
    ipc.send('off-event', {});
    assert.strictEqual(offFired, 1, 'off must remove listener');
  }

  // Contract 5: ipcMain removeHandler and removeAllListeners successfully clear registered handlers and event listeners
  {
    const ipc = createIpcMain();

    ipc.handle('temp-action', async () => 'ready');
    const initCheck = await ipc.invoke('temp-action', {});
    assert.strictEqual(initCheck, 'ready');

    ipc.removeHandler('temp-action');
    await assert.rejects(
      async () => {
        await ipc.invoke('temp-action', {});
      },
      /No handler registered for 'temp-action'/,
      'removeHandler must remove registered invoke handler'
    );

    // removeAllListeners
    let counter = 0;
    ipc.on('multi-chan', () => counter++);
    ipc.on('multi-chan', () => counter++);
    assert.strictEqual(ipc.listenerCount('multi-chan'), 2);

    ipc.removeAllListeners('multi-chan');
    assert.strictEqual(ipc.listenerCount('multi-chan'), 0);
    ipc.send('multi-chan', {});
    assert.strictEqual(counter, 0, 'removeAllListeners must remove all listeners for the channel');
  }

  console.log('All 5 contracts passed successfully.');
}

runTests().catch((err) => {
  console.error('Contract test failed:', err);
  process.exit(1);
});

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