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Contributing to risc0

Thank you for your interest in contributing to RISC Zero! We welcome contributions from everyone.

If you have any questions about contributing, or about the project in general, please ask in our Discord channel.

Quick Start

To run the test suite, the following dependencies are needed:

Git Large File Storage

Once installed, run:

git lfs install
git lfs pull

Rust

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

RISC Zero toolchain

The RISC Zero toolchain must match the version of crates you are compiling.

When testing and running examples within this library, you can install cargo-risczero from source:

cargo install --force --path risc0/cargo-risczero

Otherwise, if using a stable version branch, you can install cargo-risczero through the standard flow:

curl -L https://risczero.com/install | bash
rzup install

Optionally, you can specify which version of cargo-risczero to install with:

rzup install --version $VERSION

NOTE: It is only important that you install cargo-risczero with a matching version of the zkvm crate when interacting with the proof system as a separate, pre-built process (ExternalProver), which is currently the default. If you are using the prove feature on the risc0-zkvm crate for the host, this will compile the proving system into the host binary.

xtask wasm tools (if testing browser-verify)

cargo xtask install
cargo xtask gen-receipt

PR Checklist

Before submitting a PR, ensure the following:

  1. Fork the risc0 repository and create a new branch there to do your work.
  2. Format with cargo fmt --all.
  3. Lint with python3 clippy.py.
  4. Perform a license check with python3 license-check.py.
  5. Tests pass with cargo test -F prove.
  6. Open a PR against the main branch.