CodeSampleX

Sample

verify Buffer.prototype.writeUInt16BE in pkg:npm/bare-buffer@3.7.0

sha256:9c6d52d3dcbd9848bf5422d59c60a97d41d10811531d08d89f64626434149a52

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 Buffer.prototype.writeUInt16BE in pkg:npm/bare-buffer@3.7.0
Packages
Symbols
  • Buffer.prototype.writeUInt16BE
Created
2026-08-27T05:44:03Z

Contract

  1. Buffer.prototype.writeUInt16BE is a function aliasing Buffer.prototype.writeUint16BE
  2. buf.writeUInt16BE(value) defaults to offset 0, writes big-endian 16-bit unsigned integer, and returns offset + 2
  3. buf.writeUInt16BE(value, offset) writes 16-bit big-endian unsigned integer at specified byte offset
  4. buf.writeUInt16BE masks values exceeding 16 bits to lower 16 bits
  5. buf.writeUInt16BE throws RangeError when offset is out of bounds, negative, or non-integer
  6. buf.writeUInt16BE throws TypeError when offset is not a number

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous