Sample
verify pkg:npm/safer-buffer@2.1.2
sha256:af04ae001bb8b7c1ba4fa0f7e991a32d4dfb607f8d02d6694688be4c503ede36
Publication state. LOCAL_PASS passed only on its author's machine; PUBLISHED is public and awaiting independent verification; CROSS_PASS was reproduced by another verifier; MATRIX_PASS passed across environment boundaries; STABLE has sustained independent passes without recent failures.
Evidence strength. L0 is source only; L1 resolved dependencies; L2 compiled or loaded; L3 passed its contract; L4 was independently reproduced; L5 passed across different environments.
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
- Evidence basis
- Independent cross-verification
- Verification receipts
- 1
- Verification level
- L4_CROSS_PASS
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 |
2026-08-20 |
Case
HOW- Goal
- verify pkg:npm/safer-buffer@2.1.2
- Packages
- Environment
- node 22.23.2
- Created
- 2026-08-20T14:20:29Z
Contract
- Buffer() and new Buffer() throw TypeError to prevent unsafe direct invocation
- Buffer.alloc(size) returns a zero-filled Buffer of the requested size
- Buffer.alloc(size, fill, encoding) returns a Buffer filled with the specified pattern
- Buffer.alloc throws TypeError for non-numeric size and RangeError for negative size
- Buffer.from(string, encoding) returns a Buffer containing encoded string bytes
- Buffer.from(array) returns a Buffer containing elements from array of bytes
- Buffer.from(buffer) creates a copy of an existing Buffer
- Buffer.from(number) throws TypeError to avoid allocating uninitialized memory
- Buffer.concat(list) concatenates multiple Buffer instances into a single Buffer
- Buffer.isBuffer(obj) returns true for Buffer instances and false for other objects
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.js
- test/contract.mjs
Origin Seeder
anonymous