CodeSampleX

Exemplo

@electron/get 3.1.0

Amostra verificada para npm @electron/get 3.1.0. O contrato rodou em node 22 · linux alpine/x64 · docker e passou: getHostArch returns the host architecture…

sha256:e0a8972ef0e390d6f555ca1fbdd653abf5146254d94f79c65b47dcbfcdc1170a

Esta rede oferece uma coisa: uma amostra que compila. Ela a executou em um sandbox e guardou o recibo assinado. Não classifica nem garante nada — se o mesmo código compila onde você está, ela não mediu. Quantas chaves de assinatura distintas enviaram um recibo de contrato aprovado. Uma é só o autor; mais de uma significa que outra pessoa também o compilou. Uma chave é gerada por conta própria e não tem identidade registrada por trás, então conta chaves, não pessoas. MIT-0

Evidência de execução

O ambiente declarado e as execuções assinadas ficam separados, para você ver exatamente o que esta amostra executou e onde.

Base da evidência
Contrato assinado aprovado
Recibos de verificação
1
Chaves de assinatura que o compilaram
1
Ambiente declarado linux 24 · ubuntu · glibc 2.39 x64 npm

Ambientes das execuções de verificação

Ambiente Contrato Etapas Execução
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…		 2026-08-23

Caso

HOW
Objetivo
verify pkg:npm/%40electron/get@3.1.0
Pacotes
Criado
2026-08-23T14:03:06Z

Contrato

  1. getHostArch returns the host architecture string corresponding to Node process architecture
  2. ElectronDownloadCacheMode enum provides standard cache mode values for ReadWrite, ReadOnly, WriteOnly, and Bypass
  3. downloadArtifact downloads and caches a platform artifact using a custom Downloader implementation
  4. downloadArtifact with custom checksums validates SHA256 integrity of the downloaded artifact
  5. downloadArtifact with mismatched checksums rejects with a checksum validation error
  6. downloadArtifact rejects with an Error when the version property is not provided as a string
  7. download fetches the default electron binary for the host platform and architecture using custom Downloader
  8. GotDownloader is exported as a class conforming to the Downloader interface

Arquivos

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.mjs

Baixar o artefato de código-fonte (tar.gz)

Código-fonte

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 pkg:npm/%40electron/get@3.1.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40electron/get@3.1.0

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:sha256:07d4fef639e93256e8a02b712c0ccfe01fa062d39210ad78f01623397e952faf","contract":["getHostArch returns the host architecture string corresponding to Node process architecture","ElectronDownloadCacheMode enum provides standard cache mode values for ReadWrite, ReadOnly, WriteOnly, and Bypass","downloadArtifact downloads and caches a platform artifact using a custom Downloader implementation","downloadArtifact with custom checksums validates SHA256 integrity of the downloaded artifact","downloadArtifact with mismatched checksums rejects with a checksum validation error","downloadArtifact rejects with an Error when the version property is not provided as a string","download fetches the default electron binary for the host platform and architecture using custom Downloader","GotDownloader is exported as a class conforming to the Downloader interface"],"goal":"verify pkg:npm/%40electron/get@3.1.0","kind":"HOW","packages":["pkg:npm/%40electron/get@3.1.0"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40electron/get@3.1.0"],"schemaVersion":1,"subject":"pkg:npm/%40electron/get@3.1.0","verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-electron-get",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "@electron/get": "3.1.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40electron/get@3.1.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40electron/get@3.1.0"
  ]
}
test/contract.mjs
import assert from 'node:assert/strict';
import crypto from 'node:crypto';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import process from 'node:process';
import {
  download,
  downloadArtifact,
  ElectronDownloadCacheMode,
  getHostArch,
  GotDownloader,
} from '@electron/get';

class MockDownloader {
  constructor(content = 'sample artifact payload') {
    this.content = content;
    this.downloadCount = 0;
  }

  async download(url, targetFilePath, _options) {
    this.downloadCount++;
    await fs.promises.mkdir(path.dirname(targetFilePath), { recursive: true });
    await fs.promises.writeFile(targetFilePath, this.content);
  }
}

// 1. getHostArch returns the host architecture string corresponding to Node process architecture
{
  const arch = getHostArch();
  assert.equal(typeof arch, 'string');
  assert.ok(arch.length > 0);
  if (process.arch === 'x64') {
    assert.equal(arch, 'x64');
  } else if (process.arch === 'arm64') {
    assert.equal(arch, 'arm64');
  }
}

// 2. ElectronDownloadCacheMode enum provides standard cache mode values for ReadWrite, ReadOnly, WriteOnly, and Bypass
{
  assert.equal(ElectronDownloadCacheMode.ReadWrite, 0);
  assert.equal(ElectronDownloadCacheMode.ReadOnly, 1);
  assert.equal(ElectronDownloadCacheMode.WriteOnly, 2);
  assert.equal(ElectronDownloadCacheMode.Bypass, 3);
  assert.equal(ElectronDownloadCacheMode[0], 'ReadWrite');
  assert.equal(ElectronDownloadCacheMode[1], 'ReadOnly');
  assert.equal(ElectronDownloadCacheMode[2], 'WriteOnly');
  assert.equal(ElectronDownloadCacheMode[3], 'Bypass');
}

// 3. downloadArtifact downloads and caches a platform artifact using a custom Downloader implementation
{
  const tmpDir = await fs.promises.mkdtemp(path.join(os.tmpdir(), 'csx-contract-'));
  const cacheDir = path.join(tmpDir, 'cache');
  const tempDir = path.join(tmpDir, 'temp');
  await fs.promises.mkdir(cacheDir, { recursive: true });
  await fs.promises.mkdir(tempDir, { recursive: true });

  const mockDownloader = new MockDownloader('sample-electron-binary');
  const downloadedPath = await downloadArtifact({
    version: '31.0.0',
    artifactName: 'electron',
    platform: 'linux',
    arch: 'x64',
    cacheRoot: cacheDir,
    tempDirectory: tempDir,
    downloader: mockDownloader,
    unsafelyDisableChecksums: true,
    cacheMode: ElectronDownloadCacheMode.ReadWrite,
  });

  assert.ok(typeof downloadedPath === 'string');
  assert.ok(fs.existsSync(downloadedPath));
  assert.equal(await fs.promises.readFile(downloadedPath, 'utf8'), 'sample-electron-binary');
  assert.equal(mockDownloader.downloadCount, 1);

  // Subsequent call should hit cache
  const cachedPath = await downloadArtifact({
    version: '31.0.0',
    artifactName: 'electron',
    platform: 'linux',
    arch: 'x64',
    cacheRoot: cacheDir,
    tempDirectory: tempDir,
    downloader: mockDownloader,
    unsafelyDisableChecksums: true,
    cacheMode: ElectronDownloadCacheMode.ReadWrite,
  });

  assert.equal(cachedPath, downloadedPath);
  assert.equal(mockDownloader.downloadCount, 1);

  await fs.promises.rm(tmpDir, { recursive: true, force: true });
}

// 4. downloadArtifact with custom checksums validates SHA256 integrity of the downloaded artifact
{
  const tmpDir = await fs.promises.mkdtemp(path.join(os.tmpdir(), 'csx-contract-'));
  const cacheDir = path.join(tmpDir, 'cache');
  const tempDir = path.join(tmpDir, 'temp');
  await fs.promises.mkdir(cacheDir, { recursive: true });
  await fs.promises.mkdir(tempDir, { recursive: true });

  const payload = 'validated-artifact-content';
  const sha256 = crypto.createHash('sha256').update(payload).digest('hex');
  const filename = 'electron-v31.0.0-linux-x64.zip';

  const downloadedPath = await downloadArtifact({
    version: '31.0.0',
    artifactName: 'electron',
    platform: 'linux',
    arch: 'x64',
    cacheRoot: cacheDir,
    tempDirectory: tempDir,
    downloader: new MockDownloader(payload),
    checksums: {
      [filename]: sha256,
    },
    cacheMode: ElectronDownloadCacheMode.ReadWrite,
  });

  assert.ok(fs.existsSync(downloadedPath));
  assert.equal(await fs.promises.readFile(downloadedPath, 'utf8'), payload);

  await fs.promises.rm(tmpDir, { recursive: true, force: true });
}

// 5. downloadArtifact with mismatched checksums rejects with a checksum validation error
{
  const tmpDir = await fs.promises.mkdtemp(path.join(os.tmpdir(), 'csx-contract-'));
  const cacheDir = path.join(tmpDir, 'cache');
  const tempDir = path.join(tmpDir, 'temp');
  await fs.promises.mkdir(cacheDir, { recursive: true });
  await fs.promises.mkdir(tempDir, { recursive: true });

  await assert.rejects(
    downloadArtifact({
      version: '31.0.0',
      artifactName: 'chromedriver',
      platform: 'linux',
      arch: 'x64',
      cacheRoot: cacheDir,
      tempDirectory: tempDir,
      downloader: new MockDownloader('corrupted payload'),
      checksums: {
        'chromedriver-v31.0.0-linux-x64.zip': '0000000000000000000000000000000000000000000000000000000000000000',
      },
      cacheMode: ElectronDownloadCacheMode.Bypass,
    }),
    (err) => {
      assert.ok(err instanceof Error);
      assert.match(err.message, /did not match expected checksum/i);
      return true;
    }
  );

  await fs.promises.rm(tmpDir, { recursive: true, force: true });
}

// 6. downloadArtifact rejects with an Error when the version property is not provided as a string
{
  await assert.rejects(
    downloadArtifact({}),
    (err) => {
      assert.ok(err instanceof Error);
      assert.match(err.message, /Expected property "version" to be provided as a string/i);
      return true;
    }
  );
}

// 7. download fetches the default electron binary for the host platform and architecture using custom Downloader
{
  const tmpDir = await fs.promises.mkdtemp(path.join(os.tmpdir(), 'csx-contract-'));
  const cacheDir = path.join(tmpDir, 'cache');
  const tempDir = path.join(tmpDir, 'temp');
  await fs.promises.mkdir(cacheDir, { recursive: true });
  await fs.promises.mkdir(tempDir, { recursive: true });

  const mockDownloader = new MockDownloader('default-electron-binary');
  const downloadedPath = await download('31.0.0', {
    cacheRoot: cacheDir,
    tempDirectory: tempDir,
    downloader: mockDownloader,
    unsafelyDisableChecksums: true,
    cacheMode: ElectronDownloadCacheMode.ReadWrite,
  });

  assert.ok(typeof downloadedPath === 'string');
  assert.ok(fs.existsSync(downloadedPath));
  assert.equal(await fs.promises.readFile(downloadedPath, 'utf8'), 'default-electron-binary');

  await fs.promises.rm(tmpDir, { recursive: true, force: true });
}

// 8. GotDownloader is exported as a class conforming to the Downloader interface
{
  assert.equal(typeof GotDownloader, 'function');
  const instance = new GotDownloader();
  assert.equal(typeof instance.download, 'function');
}

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