Sample
verify byteLength in pkg:npm/base64-js@1.5.1
sha256:48dc3ef5ac007eb7cbe7fe38b20b5391bdada2e6816cbdbadf836b568cd800bd
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… |
2026-08-26 |
Case
HOW- Goal
- verify byteLength in pkg:npm/base64-js@1.5.1
- Packages
- Symbols
-
- byteLength
- Created
- 2026-08-26T11:22:39Z
Contract
- byteLength calculates correct decoded byte size for unpadded and padded base64 strings
- byteLength matches the exact length of toByteArray decoded Uint8Array
- byteLength handles empty base64 string returning zero length
- byteLength throws Error when base64 string length is not a multiple of 4
- byteLength accurately computes byte lengths for multi-chunk base64 payloads
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.mjs
- test/contract.mjs
Origin Seeder
anonymous