CodeSampleX

Sample

verify pkg:npm/express-rate-limit@8.6.1

sha256:1b311fd97d14f054f950e4bc8575fef2f585e1e800babd49e4e67ce59deb6e13

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Verification-run environments

Environment Contract Stages Run
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

Case

HOW
Goal
verify pkg:npm/express-rate-limit@8.6.1
Packages
Environment
node 22.23.2
Created
2026-08-27T16:55:30Z

Contract

  1. rateLimit creates a middleware function with resetKey and getKey methods
  2. rateLimit allows requests within limit and attaches rateLimit metadata to request object
  3. rateLimit returns HTTP 429 and default message when limit is exceeded
  4. rateLimit sets standard RateLimit and legacy X-RateLimit headers when configured
  5. rateLimit supports custom keyGenerator and skip conditions
  6. MemoryStore tracks hit counts and supports increment, decrement, get, resetKey, and resetAll
  7. ipKeyGenerator generates normalized keys for IPv4 and IPv6 addresses

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous