CodeSampleX

Exemple

cacache 19.0.1: get, put

Échantillon vérifié pour npm cacache 19.0.1: get, put. Le contrat s'est exécuté sur node 22 · linux debian/x64 · docker et a réussi.

sha256:7e848167d887c45336c81e9b5b478979d972d54304733d48448bc1716a5c4eea

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
1
Clés de signature qui l’ont compilé
1
Environnement déclaré linux 24 · ubuntu · glibc 2.39 x64 npm

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
node 22 · linux debian/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2…		 2026-10-17

Cas

HOW
Objectif
verify cacache.get in pkg:npm/cacache@19.0.1
Paquets
Symboles
  • cacache.get
  • cacache.put
Créé
2026-10-17T12:58:16Z

Contrat

  1. cacache.get(cache, key) resolves with { data, metadata, size, integrity } for an existing entry and rejects with ENOENT for a missing key
  2. cacache.get.byDigest(cache, integrity) returns the raw Buffer content matching the stored integrity digest
  3. cacache.get.info(cache, key) and cacache.get.hasContent(cache, integrity) inspect entry metadata and content presence without reading data
  4. cacache.get.stream(cache, key) and cacache.get.stream.byDigest(cache, integrity) stream the cached payload

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code source

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 cacache.get in pkg:npm/cacache@19.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/cacache@19.0.1
Demonstrate these symbols/APIs:
  - cacache.get

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:sha256:64cb70160a7c7b2c71b2ac82ce52f1621a96c070480f6733b2a0e7a15a6f753c","contract":["cacache.get(cache, key) resolves with { data, metadata, size, integrity } for an existing entry and rejects with ENOENT for a missing key","cacache.get.byDigest(cache, integrity) returns the raw Buffer content matching the stored integrity digest","cacache.get.info(cache, key) and cacache.get.hasContent(cache, integrity) inspect entry metadata and content presence without reading data","cacache.get.stream(cache, key) and cacache.get.stream.byDigest(cache, integrity) stream the cached payload"],"goal":"verify cacache.get in pkg:npm/cacache@19.0.1","kind":"HOW","packages":["pkg:npm/cacache@19.0.1"],"schemaVersion":1,"symbols":["cacache.get","cacache.put"]},"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/cacache@19.0.1"],"schemaVersion":1,"subject":"pkg:npm/cacache@19.0.1","symbols":["cacache.get","cacache.put"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "cacache-get-sample",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "cacache": "19.0.1"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify cacache.get in pkg:npm/cacache@19.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/cacache@19.0.1"
  ],
  "symbols": [
    "cacache.get"
  ]
}
src/index.mjs
import cacache from 'cacache';

export async function runGetVerification(cacheDir) {
  const key = 'sample-entry-key';
  const payload = Buffer.from('verified cache payload content', 'utf8');
  const metadata = { category: 'test', version: 2 };

  const integrity = await cacache.put(cacheDir, key, payload, { metadata });

  const entry = await cacache.get(cacheDir, key);
  const byDigestData = await cacache.get.byDigest(cacheDir, integrity);
  const info = await cacache.get.info(cacheDir, key);
  const hasContent = await cacache.get.hasContent(cacheDir, integrity);

  const streamChunks = [];
  await new Promise((resolve, reject) => {
    const stream = cacache.get.stream(cacheDir, key);
    stream.on('data', (chunk) => streamChunks.push(chunk));
    stream.on('end', resolve);
    stream.on('error', reject);
  });
  const streamedData = Buffer.concat(streamChunks);

  const digestStreamChunks = [];
  await new Promise((resolve, reject) => {
    const stream = cacache.get.stream.byDigest(cacheDir, integrity);
    stream.on('data', (chunk) => digestStreamChunks.push(chunk));
    stream.on('end', resolve);
    stream.on('error', reject);
  });
  const digestStreamedData = Buffer.concat(digestStreamChunks);

  return {
    integrity: String(integrity),
    entryData: entry.data.toString('utf8'),
    entrySize: entry.size,
    entryMetadata: entry.metadata,
    entryIntegrity: String(entry.integrity),
    byDigestText: byDigestData.toString('utf8'),
    infoKey: info.key,
    infoSize: info.size,
    infoMetadata: info.metadata,
    hasContentSize: hasContent.size,
    streamedText: streamedData.toString('utf8'),
    digestStreamedText: digestStreamedData.toString('utf8')
  };
}
test/contract.mjs
import assert from 'node:assert/strict';
import { rm } from 'node:fs/promises';
import cacache from 'cacache';
import { runGetVerification } from '../src/index.mjs';

const cacheDir = './.cache-get-test';

await rm(cacheDir, { recursive: true, force: true });
try {
  const result = await runGetVerification(cacheDir);

  assert.equal(result.integrity.startsWith('sha512-'), true);
  assert.equal(result.entryData, 'verified cache payload content');
  assert.equal(result.entrySize, 30);
  assert.deepEqual(result.entryMetadata, { category: 'test', version: 2 });
  assert.equal(result.entryIntegrity, result.integrity);
  assert.equal(result.byDigestText, 'verified cache payload content');
  assert.equal(result.infoKey, 'sample-entry-key');
  assert.equal(result.infoSize, 30);
  assert.deepEqual(result.infoMetadata, { category: 'test', version: 2 });
  assert.equal(result.hasContentSize, 30);
  assert.equal(result.streamedText, 'verified cache payload content');
  assert.equal(result.digestStreamedText, 'verified cache payload content');

  await assert.rejects(
    () => cacache.get(cacheDir, 'missing-key'),
    (err) => err && err.code === 'ENOENT'
  );
} finally {
  await rm(cacheDir, { recursive: true, force: true });
}

Seeder d'origine

anonyme