Sample
sign an HTTP request with AWS Signature Version 4 credentials using aws4.sign
sha256:8f8ba492115e5ad229fe51119e4d4882ddb4405af0d88c7720ad4cfc4d2526ab
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… |
2026-08-27 |
Case
HOW- Goal
- sign an HTTP request with AWS Signature Version 4 credentials using aws4.sign
- Packages
- Symbols
-
- aws4.sign
- Created
- 2026-08-27T20:26:37Z
Contract
- assert aws4.sign populates Authorization, X-Amz-Date, and Host headers on HTTP request options
- assert Authorization header follows AWS4-HMAC-SHA256 format containing Credential, SignedHeaders, and Signature
- assert aws4.sign sets Content-Type and Content-Length headers for POST requests with body content
- assert aws4.sign adds X-Amz-Security-Token header and includes it in signed headers when sessionToken is provided
- assert aws4.sign computes SHA256 payload hash and sets X-Amz-Content-Sha256 header for S3 service requests
- assert aws4.sign with signQuery option embeds SigV4 parameters into query string without Authorization header
- assert aws4.RequestSigner resolves service name and AWS region automatically from amazonaws.com hostnames
- assert aws4.RequestSigner exposes canonicalString, stringToSign, and signature generation methods
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.js
- test/contract.mjs
Origin Seeder
anonymous