Sample
Hex and base64 encoding decoding, searching, and byte length calculation with bare-buffer
sha256:705904c3612b5ab69611b5d0cddc3b3d08aa40113dd9b8a4f2efdfbf70011c5a
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… |
2026-08-26 |
Case
HOW- Goal
- Hex and base64 encoding decoding, searching, and byte length calculation with bare-buffer
- Packages
- Symbols
-
- Buffer.byteLength
- Buffer.isEncoding
- Buffer.prototype.fill
- Buffer.prototype.includes
- Buffer.prototype.indexOf
- Environment
- node 22.23.2
- Created
- 2026-08-26T14:11:39Z
Contract
- Buffer.isEncoding returns true for standard encodings and false for unsupported formats
- Buffer.byteLength calculates exact byte sizes for utf8, hex, and base64 encoded strings
- Buffer.from and toString convert accurately between binary buffers and hex strings
- Buffer.from and toString convert accurately between binary buffers and base64 strings
- fill populates buffer ranges with numeric byte values and repeated string patterns
- indexOf finds first occurrence offset of byte values, strings, and buffers
- includes checks whether a buffer contains a specific sequence or byte value
- indexOf returns -1 and includes returns false when target pattern is not present
Files
- PROMPT.md
- csx.json
- index.js
- package-lock.json
- package.json
- spec.json
- test/contract.mjs
Origin Seeder
anonymous