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CONTRIBUTING.md

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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

Run rzup install to install the latest Rust and C++ toolchains.

cargo run --bin rzup install rust
cargo run --bin rzup install cpp

The versions of r0vm and cargo-risczero must match the source code. Compile and install these from source when using a development branch. The cargo-risczero package includes both the r0vm and cargo-risczero binaries.

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

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: 
    RISC0_SKIP_BUILD=1 cargo clippy
$(cd examples && RISC0_SKIP_BUILD=1 cargo clippy)
$(cd benchmarks && RISC0_SKIP_BUILD=1 cargo clippy)
  4. Perform the license check with python3 license-check.py.
  5. Tests pass with: 
    cargo test -F prove -F docker
$(cd examples && cargo test)
$(cd benchmarks && cargo test)
  6. Commit any outdated Cargo.lock files.
  7. Open a PR against the main branch.