CodeSampleX

Sample

encode and decode unsigned and signed leb128 integers with @webassemblyjs/leb128

sha256:ebb02c65d559064be5ef36039fc408a5a19247e4266c2d960f503293794c1d43

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
encode and decode unsigned and signed leb128 integers with @webassemblyjs/leb128
Packages
Symbols
  • decodeInt32
  • decodeUInt32
  • encodeI32
  • encodeU32
Environment
node 22.23.2
Created
2026-08-27T23:26:08Z

Contract

  1. encodeU32 encodes an unsigned 32-bit integer into a Uint8Array using LEB128 encoding
  2. decodeUInt32 decodes LEB128 encoded bytes into an unsigned 32-bit integer value and returns nextIndex
  3. encodeI32 encodes a signed 32-bit integer into a Uint8Array using LEB128 encoding
  4. decodeInt32 decodes LEB128 encoded bytes into a signed 32-bit integer value and returns nextIndex

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous