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[](https://travis-ci.org/rust-bitcoin/rust-secp256k1)
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[Full documentation ](https://docs.rs/secp256k1/ )
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### rust-secp256k1
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`rust-secp256k1` is a wrapper around ,
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a C library by Pieter Wuille for producing ECDSA signatures using the SECG curve
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`secp256k1` . This library
* exposes type-safe Rust bindings for all `libsecp256k1` functions
* implements key generation
* implements deterministic nonce generation via RFC6979
* implements many unit tests, adding to those already present in `libsecp256k1`
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* makes no allocations (except in unit tests) for efficiency and use in freestanding implementations
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### Contributing
Contributions to this library are welcome. A few guidelines:
* Any breaking changes must have an accompanied entry in CHANGELOG.md
* No new dependencies, please.
* No crypto should be implemented in Rust, with the possible exception of hash functions. Cryptographic contributions should be directed upstream to libsecp256k1.
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* This library should always compile with any combination of features on **Rust 1.22** .
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## A note on Rust 1.22 support
The build dependency `cc` might require a more recent version of the Rust compiler.
To ensure compilation with Rust 1.22.0, pin its version in your `Cargo.lock`
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with `cargo update -p cc --precise 1.0.41` . If you're using `secp256k1` in a library,
to make sure it compiles in CI, you'll need to generate a lockfile first.
Example for Travis CI:
```yml
before_script:
- if [ "$TRAVIS_RUST_VERSION" == "1.22.0" ]; then
cargo generate-lockfile --verbose & & cargo update -p cc --precise "1.0.41" --verbose;
fi
```
