Sample
verify 64-bit integer arithmetic and string parsing with Long.fromString in pkg:npm/%40xtuc/long@4.2.2
sha256:0cbce30e7675d25fafd5d9c669718b78dd9d3cb378655de0de4c1664d0e08cdd
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
- verify 64-bit integer arithmetic and string parsing with Long.fromString in pkg:npm/%40xtuc/long@4.2.2
- Packages
- Symbols
-
- @xtuc/long.fromString
- Environment
- node 22.23.2
- Created
- 2026-08-27T23:37:44Z
Contract
- Long and utility functions are exported correctly
- Long.fromString parses signed 64-bit integer strings including boundary values
- Long.fromString parses unsigned 64-bit integer strings with custom radix support
- add64 and multiply64 perform precise 64-bit arithmetic beyond Number.MAX_SAFE_INTEGER
- divide64 computes 64-bit division and compare64 evaluates relational ordering
- bitwiseAnd64 and shiftLeft64 perform exact 64-bit bitwise logic and shifting
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.js
- test/contract.mjs
Origin Seeder
anonymous