CodeSampleX

Sample

shrink padded LEB128 section sizes in WebAssembly binary using shrinkPaddedLEB128

sha256:cfa6933475aece3d2719faf05996ce8ff7092a5e19fc627dc37516ad6634bc96

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
shrink padded LEB128 section sizes in WebAssembly binary using shrinkPaddedLEB128
Packages
Symbols
  • shrinkPaddedLEB128
Created
2026-08-27T23:30:39Z

Contract

  1. shrinkPaddedLEB128 rewrites padded LEB128 section sizes in a WebAssembly binary to their minimal LEB128 encoding length
  2. shrinkPaddedLEB128 preserves already minimal WebAssembly binary without altering byte content
  3. shrinkPaddedLEB128 produces valid WebAssembly bytes that compile and instantiate in WebAssembly engine
  4. shrinkPaddedLEB128 throws an Error when decoding malformed WebAssembly binary buffer

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous