Sample
tower-service 0.3.3: Allow generic Service dispatch and request pipelining via &mut S blanket impl without tying the returned Future to the reference lifetime
Verified sample for cargo tower-service 0.3.3: Allow generic Service dispatch and request pipelining via &mut S blanket impl without tying the returned…
sha256:78b5761fe34700285b0b8908344c8a23d8055a321ae72d6d0c76f55e6d77e78a
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
rust linux x64 rust rust cargo
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-16 |
| rust 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-18 |
Case
HOW- Goal
- Allow generic Service dispatch and request pipelining via &mut S blanket impl without tying the returned Future to the reference lifetime
- Packages
- Symbols
-
- tower_service::Service
- tower_service::Service::poll_ready
- tower_service::Service::call
- Environment
- rust
- Created
- 2026-08-16T11:21:18Z
Contract
- Passing a mutable reference &mut S into a generic Service consumer yields S::Future without tying the future to the &mut borrow lifetime, allowing immediate re-borrowing to poll and dispatch subsequent requests while earlier futures remain in flight
- Box<dyn Service<Request, Response = Res, Error = Err, Future = Fut>> implements Service directly via blanket impl, requiring the Future associated type to be explicitly defined for trait object safety
- Each poll_ready readiness permit is single-use and consumed by the subsequent call, delegating transparently through &mut S and Box<S> blanket implementations
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs
- tests/contract.rs