Sample
fastify 5.12.0: Validate a request body with fastify's built-in JSON schema
Verified sample for npm fastify 5.12.0: Validate a request body with fastify's built-in JSON schema. The contract ran on node 22 · linux alpine/x64 · docker…
sha256:cf8c009bbe11e77e2f092a89345c9181edf2fdea1e1375bd62f43c34d711e48b
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
- 2
- Signing keys that built it
- 2
Declared environment
node 22 linux x64 node 22 javascript npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:a2ec939a4c60e243 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-13 |
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-17 |
Case
HOW- Goal
- Validate a request body with fastify's built-in JSON schema
- Packages
- Symbols
-
- fastify
- route schema
- app.inject
- Environment
- node 22
- Created
- 2026-08-13T18:14:38Z
Contract
- declare a route with a JSON schema for its body
- assert a valid body reaches the handler
- assert an invalid body is rejected with 400 before the handler runs
- assert inject tests the app without opening a socket
Files
- csx.json
- package-lock.json
- package.json
- src/index.mjs
- test/contract.mjs