# halo2_proofs [![Crates.io](https://img.shields.io/crates/v/halo2_proofs.svg)](https://crates.io/crates/halo2_proofs) # **IMPORTANT**: This library is in beta, and should not be used in production software. ## [Documentation](https://docs.rs/halo2_proofs) ## Minimum Supported Rust Version Requires Rust **1.51** or higher. Minimum supported Rust version can be changed in the future, but it will be done with a minor version bump. ## Controlling parallelism `halo2_proofs` currently uses [rayon](https://github.com/rayon-rs/rayon) for parallel computation. The `RAYON_NUM_THREADS` environment variable can be used to set the number of threads. ## License Licensed under either of * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) at your option. ### Contribution Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.