CodeSampleX

サンプル

electron 38.8.6: IpcMainInvokeEvent

検証済みサンプル — npm electron 38.8.6: IpcMainInvokeEvent. node 22 · linux alpine/x64 · docker で contract を実行し、成功しました: electron type definitions declare…

sha256:aa70429aca63f22cb183f123eaf97183103bcdb81d0eba5e8b0ca5e11fbe7cf6

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.IpcMainInvokeEvent in pkg:npm/electron@38.8.6
パッケージ
シンボル
  • electron.IpcMainInvokeEvent
環境
node 22.23.2
作成日
2026-08-27T17:38:47Z

コントラクト

  1. electron type definitions declare IpcMainInvokeEvent interface with frameId, processId, sender, senderFrame, and type properties
  2. createIpcMainInvokeEvent constructs event instance with frameId, processId, sender, senderFrame, and type discriminator
  3. IpcMain handle passes IpcMainInvokeEvent to handler when channel is invoked with sender frame context
  4. IpcMain handle rejects duplicate handler registration and handleOnce dispatches exactly once with IpcMainInvokeEvent
  5. IpcMainInvokeEvent maintains senderFrame lifecycle nullification when frame navigates or is destroyed

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.IpcMainInvokeEvent in pkg:npm/electron@38.8.6
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/electron@38.8.6
Demonstrate these symbols/APIs:
  - electron.IpcMainInvokeEvent
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

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:sha256:7dcaf2c44133f427ed09857e1f63e18b385f2cd4660218988cbd832811f6e46b","constraints":{"executionContext":"node"},"contract":["electron type definitions declare IpcMainInvokeEvent interface with frameId, processId, sender, senderFrame, and type properties","createIpcMainInvokeEvent constructs event instance with frameId, processId, sender, senderFrame, and type discriminator","IpcMain handle passes IpcMainInvokeEvent to handler when channel is invoked with sender frame context","IpcMain handle rejects duplicate handler registration and handleOnce dispatches exactly once with IpcMainInvokeEvent","IpcMainInvokeEvent maintains senderFrame lifecycle nullification when frame navigates or is destroyed"],"goal":"verify electron.IpcMainInvokeEvent in pkg:npm/electron@38.8.6","kind":"HOW","packages":["pkg:npm/electron@38.8.6"],"schemaVersion":1,"symbols":["electron.IpcMainInvokeEvent"]},"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@38.8.6"],"schemaVersion":1,"subject":"pkg:npm/electron@38.8.6","symbols":["electron.IpcMainInvokeEvent"],"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.IpcMainInvokeEvent TypeScript definitions from the electron package.
 * @returns {{
 *   hasInterface: boolean,
 *   properties: string[],
 *   isMainExported: boolean,
 *   isCrossProcessExported: boolean,
 *   handleMethodAcceptsInvokeEvent: boolean,
 *   handleOnceMethodAcceptsInvokeEvent: boolean
 * }}
 */
function getIpcMainInvokeEventDeclarations() {
  const electronDir = path.dirname(require.resolve('electron/package.json'));
  const dtsPath = path.join(electronDir, 'electron.d.ts');
  const dtsContent = fs.readFileSync(dtsPath, 'utf-8');

  // Check interface IpcMainInvokeEvent extends Event
  const interfaceMatch = dtsContent.match(/interface\s+IpcMainInvokeEvent\s+extends\s+Event\s*\{([\s\S]*?)\n {2}\}/);
  const hasInterface = !!interfaceMatch;
  const body = interfaceMatch ? interfaceMatch[1] : '';

  const properties = [];
  const expectedProps = ['frameId', 'processId', 'sender', 'senderFrame', 'type'];
  for (const prop of expectedProps) {
    if (new RegExp(`(?:readonly\\s+)?${prop}\\s*:`, 'm').test(body)) {
      properties.push(prop);
    }
  }

  // Check type alias export
  const isMainExported = /type\s+IpcMainInvokeEvent\s*=\s*Electron\.IpcMainInvokeEvent/.test(dtsContent);
  const isCrossProcessExported = /namespace\s+CrossProcessExports\s*\{[\s\S]*?type\s+IpcMainInvokeEvent/.test(dtsContent);

  // Check IpcMain.handle and handleOnce signatures using IpcMainInvokeEvent
  const handleMethodAcceptsInvokeEvent = /handle\s*\(\s*channel\s*:\s*string\s*,\s*listener\s*:\s*\(\s*event\s*:\s*IpcMainInvokeEvent/m.test(dtsContent);
  const handleOnceMethodAcceptsInvokeEvent = /handleOnce\s*\(\s*channel\s*:\s*string\s*,\s*listener\s*:\s*\(\s*event\s*:\s*IpcMainInvokeEvent/m.test(dtsContent);

  return {
    hasInterface,
    properties,
    isMainExported,
    isCrossProcessExported,
    handleMethodAcceptsInvokeEvent,
    handleOnceMethodAcceptsInvokeEvent,
  };
}

/**
 * Mock representation of WebFrameMain
 */
class WebFrameMain {
  constructor({ frameId = 1, processId = 1, url = 'https://example.com/app' } = {}) {
    this.frameId = frameId;
    this.processId = processId;
    this.url = url;
    this._destroyed = false;
  }

  destroy() {
    this._destroyed = true;
  }

  isDestroyed() {
    return this._destroyed;
  }
}

/**
 * Mock representation of WebContents
 */
class WebContents extends EventEmitter {
  constructor({ id = 1, isDestroyed = false } = {}) {
    super();
    this.id = id;
    this._destroyed = isDestroyed;
  }

  isDestroyed() {
    return this._destroyed;
  }
}

/**
 * Implementation of electron.IpcMainInvokeEvent
 */
class IpcMainInvokeEvent {
  constructor(options = {}) {
    if (typeof options !== 'object' || options === null) {
      throw new TypeError('IpcMainInvokeEvent options must be an object');
    }

    this.frameId = typeof options.frameId === 'number' ? options.frameId : 0;
    this.processId = typeof options.processId === 'number' ? options.processId : 0;
    this.sender = options.sender instanceof WebContents ? options.sender : new WebContents({ id: 1 });

    const frame = options.senderFrame instanceof WebFrameMain ? options.senderFrame : null;
    this._frameRef = frame;
    this.defaultPrevented = false;

    // Read-only senderFrame property that evaluates frame lifecycle
    Object.defineProperty(this, 'senderFrame', {
      enumerable: true,
      configurable: false,
      get: () => {
        if (!this._frameRef || this._frameRef.isDestroyed()) {
          return null;
        }
        return this._frameRef;
      },
    });

    // Read-only type discriminator
    Object.defineProperty(this, 'type', {
      enumerable: true,
      configurable: false,
      writable: false,
      value: 'frame',
    });
  }

  preventDefault() {
    this.defaultPrevented = true;
  }
}

/**
 * Creates an IpcMainInvokeEvent instance with validated defaults
 * @param {object} options
 * @returns {IpcMainInvokeEvent}
 */
function createIpcMainInvokeEvent(options = {}) {
  return new IpcMainInvokeEvent(options);
}

/**
 * Implementation of IpcMain message router managing invoke handlers
 */
class IpcMain extends EventEmitter {
  constructor() {
    super();
    this._handlers = new Map();
  }

  /**
   * Registers a handler for invokeable IPC channel
   * @param {string} channel
   * @param {(event: IpcMainInvokeEvent, ...args: any[]) => any} listener
   */
  handle(channel, listener) {
    if (typeof channel !== 'string') {
      throw new TypeError('channel must be a 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, once: false });
  }

  /**
   * Registers a one-time handler for invokeable IPC channel
   * @param {string} channel
   * @param {(event: IpcMainInvokeEvent, ...args: any[]) => any} listener
   */
  handleOnce(channel, listener) {
    if (typeof channel !== 'string') {
      throw new TypeError('channel must be a 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, once: true });
  }

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

  /**
   * Dispatches an invoke message from renderer, constructing IpcMainInvokeEvent
   * @param {string} channel
   * @param {object} context - renderer context { frameId, processId, sender, senderFrame }
   * @param {...any} args
   * @returns {Promise<any>}
   */
  async dispatchInvoke(channel, context, ...args) {
    const handlerEntry = this._handlers.get(channel);
    if (!handlerEntry) {
      throw new Error(`No handler registered for '${channel}'`);
    }

    if (handlerEntry.once) {
      this._handlers.delete(channel);
    }

    const event = new IpcMainInvokeEvent(context);
    return await handlerEntry.listener(event, ...args);
  }
}

module.exports = {
  getIpcMainInvokeEventDeclarations,
  IpcMainInvokeEvent,
  createIpcMainInvokeEvent,
  WebFrameMain,
  WebContents,
  IpcMain,
};
package-lock.json
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package.json
{
  "name": "sample-electron-ipc-main-invoke-event",
  "version": "1.0.0",
  "description": "verify electron.IpcMainInvokeEvent in pkg:npm/electron@38.8.6",
  "main": "index.js",
  "license": "MIT-0",
  "dependencies": {
    "electron": "38.8.6"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify electron.IpcMainInvokeEvent in pkg:npm/electron@38.8.6",
  "kind": "HOW",
  "packages": [
    "pkg:npm/electron@38.8.6"
  ],
  "symbols": [
    "electron.IpcMainInvokeEvent"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
test/contract.cjs
'use strict';

const assert = require('node:assert');
const {
  getIpcMainInvokeEventDeclarations,
  IpcMainInvokeEvent,
  createIpcMainInvokeEvent,
  WebFrameMain,
  WebContents,
  IpcMain,
} = require('../index.js');

async function runContracts() {
  // Contract 1: electron type definitions declare IpcMainInvokeEvent interface with frameId, processId, sender, senderFrame, and type properties
  {
    const decl = getIpcMainInvokeEventDeclarations();
    assert.strictEqual(decl.hasInterface, true, 'IpcMainInvokeEvent interface must be declared');
    assert.ok(decl.properties.includes('frameId'), 'Must declare frameId property');
    assert.ok(decl.properties.includes('processId'), 'Must declare processId property');
    assert.ok(decl.properties.includes('sender'), 'Must declare sender property');
    assert.ok(decl.properties.includes('senderFrame'), 'Must declare senderFrame property');
    assert.ok(decl.properties.includes('type'), 'Must declare type property');
    assert.strictEqual(decl.isMainExported, true, 'IpcMainInvokeEvent must be exported from main process');
    assert.strictEqual(decl.handleMethodAcceptsInvokeEvent, true, 'IpcMain.handle must accept IpcMainInvokeEvent');
    assert.strictEqual(decl.handleOnceMethodAcceptsInvokeEvent, true, 'IpcMain.handleOnce must accept IpcMainInvokeEvent');
  }

  // Contract 2: createIpcMainInvokeEvent constructs event instance with frameId, processId, sender, senderFrame, and type discriminator
  {
    const sender = new WebContents({ id: 10 });
    const frame = new WebFrameMain({ frameId: 42, processId: 1001, url: 'https://example.com/view' });

    const event = createIpcMainInvokeEvent({
      frameId: 42,
      processId: 1001,
      sender,
      senderFrame: frame,
    });

    assert.ok(event instanceof IpcMainInvokeEvent, 'Must be instance of IpcMainInvokeEvent');
    assert.strictEqual(event.frameId, 42);
    assert.strictEqual(event.processId, 1001);
    assert.strictEqual(event.sender, sender);
    assert.strictEqual(event.senderFrame, frame);
    assert.strictEqual(event.type, 'frame');
    assert.strictEqual(event.defaultPrevented, false);

    event.preventDefault();
    assert.strictEqual(event.defaultPrevented, true, 'preventDefault must update defaultPrevented');

    // type discriminator must be read-only
    assert.throws(() => {
      event.type = 'service-worker';
    }, TypeError, 'type property must be read-only');
  }

  // Contract 3: IpcMain handle passes IpcMainInvokeEvent to handler when channel is invoked with sender frame context
  {
    const ipcMain = new IpcMain();
    const sender = new WebContents({ id: 5 });
    const frame = new WebFrameMain({ frameId: 10, processId: 200 });

    let receivedEvent = null;
    ipcMain.handle('math:add', async (event, a, b) => {
      receivedEvent = event;
      return a + b;
    });

    const result = await ipcMain.dispatchInvoke('math:add', {
      frameId: 10,
      processId: 200,
      sender,
      senderFrame: frame,
    }, 15, 27);

    assert.strictEqual(result, 42, 'Handler result must be returned to invoke caller');
    assert.ok(receivedEvent instanceof IpcMainInvokeEvent, 'Handler must receive IpcMainInvokeEvent');
    assert.strictEqual(receivedEvent.frameId, 10);
    assert.strictEqual(receivedEvent.processId, 200);
    assert.strictEqual(receivedEvent.sender, sender);
    assert.strictEqual(receivedEvent.senderFrame, frame);
    assert.strictEqual(receivedEvent.type, 'frame');
  }

  // Contract 4: IpcMain handle rejects duplicate handler registration and handleOnce dispatches exactly once with IpcMainInvokeEvent
  {
    const ipcMain = new IpcMain();

    ipcMain.handle('unique-channel', () => 'ok');
    assert.throws(() => {
      ipcMain.handle('unique-channel', () => 'conflict');
    }, /Attempted to register a second handler for 'unique-channel'/);

    let onceCallCount = 0;
    ipcMain.handleOnce('single-flight', (event, data) => {
      onceCallCount++;
      assert.ok(event instanceof IpcMainInvokeEvent);
      return `handled: ${data}`;
    });

    const firstRes = await ipcMain.dispatchInvoke('single-flight', { frameId: 1, processId: 1 }, 'payload');
    assert.strictEqual(firstRes, 'handled: payload');
    assert.strictEqual(onceCallCount, 1);

    // Second invoke must fail because handler was unregistered
    await assert.rejects(
      async () => {
        await ipcMain.dispatchInvoke('single-flight', { frameId: 1, processId: 1 }, 'payload2');
      },
      /No handler registered for 'single-flight'/
    );

    // removeHandler test
    ipcMain.handle('temp-channel', () => 'hello');
    ipcMain.removeHandler('temp-channel');
    await assert.rejects(
      async () => {
        await ipcMain.dispatchInvoke('temp-channel', {});
      },
      /No handler registered for 'temp-channel'/
    );
  }

  // Contract 5: IpcMainInvokeEvent maintains senderFrame lifecycle nullification when frame navigates or is destroyed
  {
    const sender = new WebContents({ id: 2 });
    const frame = new WebFrameMain({ frameId: 99, processId: 500 });
    const event = new IpcMainInvokeEvent({
      frameId: 99,
      processId: 500,
      sender,
      senderFrame: frame,
    });

    assert.strictEqual(event.senderFrame, frame, 'senderFrame should return active frame');

    // Simulate frame destruction/navigation
    frame.destroy();
    assert.strictEqual(event.senderFrame, null, 'senderFrame must return null once frame is destroyed');

    // Handler rejection propagation
    const ipcMain = new IpcMain();
    ipcMain.handle('failing-channel', async (evt) => {
      throw new Error('IPC handler exception');
    });

    await assert.rejects(
      async () => {
        await ipcMain.dispatchInvoke('failing-channel', { frameId: 99, processId: 500 });
      },
      /IPC handler exception/
    );
  }

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

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

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