# halo2

IMPORTANT: This library is in beta, and should not be used in production software.

## 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 currently uses rayon for parallel computation. The RAYON_NUM_THREADS environment variable can be used to set the number of threads.

You may use this package under the Bootstrap Open Source Licence, version 1.0, or at your option, any later version. See the file COPYING for more details, and LICENSE-BOSL for the terms of the Bootstrap Open Source Licence, version 1.0.