fuzz.yml

name: Contract Fuzz Tests

# Runs nightly to surface fuzz panics without blocking every PR.
# Can also be triggered manually.
on:
  schedule:
    - cron: "0 2 * * *" # 02:00 UTC nightly
  workflow_dispatch:

jobs:
  fuzz:
    name: Run relay contract fuzz harness
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: contracts

    steps:
      - uses: actions/checkout@v4

      - name: Setup Rust
        uses: dtolnay/rust-toolchain@stable

      - name: Cache Cargo dependencies
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/bin/
            ~/.cargo/registry/index/
            ~/.cargo/registry/cache/
            ~/.cargo/git/db/
            contracts/target/
          key: ${{ runner.os }}-cargo-fuzz-${{ hashFiles('contracts/Cargo.lock') }}

      - name: Run relay fuzz harness (deterministic)
        run: cargo test --test relay_contract_fuzz --verbose
        # Any panic in the fuzz harness exits non-zero and fails this step.