Sample
verify pkg:npm/utf8-byte-length@1.0.5
sha256:ddd82985346606f111b4e743db8ac139292693152fdebe6746ac171376cf1cbc
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
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
- 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@1 |
2026-08-21 |
Case
HOW- Goal
- verify pkg:npm/utf8-byte-length@1.0.5
- Packages
- Environment
- node 22.23.2
- Created
- 2026-08-21T05:22:35Z
Contract
- utf8ByteLength returns 0 bytes for an empty string
- utf8ByteLength calculates 1 byte per ASCII character
- utf8ByteLength calculates 2 bytes per 2-byte UTF-8 character
- utf8ByteLength calculates 3 bytes per 3-byte UTF-8 character
- utf8ByteLength calculates 4 bytes per 4-byte UTF-8 character such as emojis
- utf8ByteLength calculates the exact total byte length for mixed multi-byte strings
- utf8ByteLength throws an Error when passed non-string inputs
Files
- PROMPT.md
- csx.json
- index.js
- package-lock.json
- package.json
- spec.json
- test/contract.mjs
Origin Seeder
anonymous