CodeSampleX

Exemple

cacache 19.0.1: put, get

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

sha256:7b16d039c66bdcce5109d3a30b0abed63880d4e742c7e77cbf2b243e1de8ec4b

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.put in pkg:npm/cacache@19.0.1
Paquets
Symboles
  • cacache.put
  • cacache.get
Créé
2026-10-17T13:11:22Z

Contrat

  1. cacache.put(cache, key, data, opts) stores content and index metadata with custom algorithms and memoize options, returning the computed integrity digest
  2. cacache.put rejects with EBADSIZE when opts.size does not match data.length and with EINTEGRITY when opts.integrity fails verification
  3. cacache.put.stream(cache, key, opts) returns a writable pipeline that writes streamed content to the cache and emits integrity and size events

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.put 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.put

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:sha256:6f89c8d32428369b3f29a01b44c2b5379d9d52e8385f592b65143849d378a0e5","contract":["cacache.put(cache, key, data, opts) stores content and index metadata with custom algorithms and memoize options, returning the computed integrity digest","cacache.put rejects with EBADSIZE when opts.size does not match data.length and with EINTEGRITY when opts.integrity fails verification","cacache.put.stream(cache, key, opts) returns a writable pipeline that writes streamed content to the cache and emits integrity and size events"],"goal":"verify cacache.put in pkg:npm/cacache@19.0.1","kind":"HOW","packages":["pkg:npm/cacache@19.0.1"],"schemaVersion":1,"symbols":["cacache.put","cacache.get"]},"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.put","cacache.get"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "cacache-put-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.put in pkg:npm/cacache@19.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/cacache@19.0.1"
  ],
  "symbols": [
    "cacache.put"
  ]
}
src/index.mjs
import cacache from 'cacache';

export async function runPutVerification(cacheDir) {
  const key = 'put-buffer-entry';
  const payload = Buffer.from('content stored via cacache.put', 'utf8');
  const metadata = { origin: 'unit', revision: 1 };
  const memoStore = new Map();

  const integrity = await cacache.put(cacheDir, key, payload, {
    metadata,
    algorithms: ['sha256'],
    size: payload.length,
    memoize: memoStore
  });

  const stored = await cacache.get(cacheDir, key);

  const streamKey = 'put-stream-entry';
  const streamPayload = Buffer.from('streamed content via cacache.put.stream', 'utf8');
  const streamMeta = { mode: 'stream' };

  let emittedIntegrity;
  let emittedSize;

  await new Promise((resolve, reject) => {
    const writable = cacache.put.stream(cacheDir, streamKey, { metadata: streamMeta });
    writable.on('integrity', (int) => {
      emittedIntegrity = String(int);
    });
    writable.on('size', (s) => {
      emittedSize = s;
    });
    writable.on('error', reject);
    writable.on('finish', resolve);
    writable.end(streamPayload);
  });

  const streamStored = await cacache.get(cacheDir, streamKey);

  return {
    integrity: String(integrity),
    storedText: stored.data.toString('utf8'),
    storedSize: stored.size,
    storedMetadata: stored.metadata,
    memoHasKey: memoStore.has(`key:${cacheDir}:${key}`),
    memoHasDigest: memoStore.has(`digest:${cacheDir}:${integrity}`),
    emittedIntegrity,
    emittedSize,
    streamStoredText: streamStored.data.toString('utf8'),
    streamStoredMetadata: streamStored.metadata
  };
}
test/contract.mjs
import assert from 'node:assert/strict';
import { rm } from 'node:fs/promises';
import cacache from 'cacache';
import { runPutVerification } from '../src/index.mjs';

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

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

  assert.equal(result.integrity.startsWith('sha256-'), true);
  assert.equal(result.storedText, 'content stored via cacache.put');
  assert.equal(result.storedSize, 30);
  assert.deepEqual(result.storedMetadata, { origin: 'unit', revision: 1 });
  assert.equal(result.memoHasKey, true);
  assert.equal(result.memoHasDigest, true);

  assert.equal(result.emittedIntegrity.startsWith('sha512-'), true);
  assert.equal(result.emittedSize, 39);
  assert.equal(result.streamStoredText, 'streamed content via cacache.put.stream');
  assert.deepEqual(result.streamStoredMetadata, { mode: 'stream' });

  await assert.rejects(
    () => cacache.put(cacheDir, 'bad-size-key', Buffer.from('abc'), { size: 10 }),
    (err) => err && err.code === 'EBADSIZE'
  );

  await assert.rejects(
    () => cacache.put(cacheDir, 'bad-integrity-key', Buffer.from('abc'), {
      integrity: 'sha512-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=='
    }),
    (err) => err && err.code === 'EINTEGRITY'
  );
} finally {
  await rm(cacheDir, { recursive: true, force: true });
}

Seeder d'origine

anonyme