CodeSampleX

Sample

verify pkg:npm/%40webassemblyjs/helper-buffer@1.14.1

sha256:7b01f30bd733fa15233169801a39bf67cd23d3b4ae03578f644a3d7887752962

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 linux 24 · ubuntu · glibc 2.39 x64 npm

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/%40webassemblyjs/helper-buffer@1.14.1
Packages
Created
2026-08-27T23:21:05Z

Contract

  1. overrideBytesInBuffer replaces a slice of Uint8Array at specified start and end offsets with replacement bytes
  2. overrideBytesInBuffer supports inserting bytes without removing any when startLoc equals endLoc
  3. overrideBytesInBuffer supports deleting bytes when replacement byte array is empty
  4. overrideBytesInBuffer throws TypeError or Error if input buffer is not Uint8Array
  5. makeBuffer flattens nested byte arrays and returns an ArrayBuffer
  6. fromHexdump parses multi-line formatted hex dump strings omitting offset column into a Uint8Array

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous