Github action step for caching RPC forked state. NOTE: edit the paths under `key` according to your project structure.

foundry-rpc-cache-action.yml

      # Always try to load any available cache - saving it again after each run. Goal is to minimize RPC calls,
      # speeding up tests. See: https://github.com/actions/cache/blob/main/workarounds.md#update-a-cache
      - name: Cache Foundry forked state
        uses: actions/cache@v3
        with:
          path: ~/.foundry/cache/rpc
          key: ${{ runner.os }}-foundry-${{ hashFiles('./ethereum/kriptal/foundry.toml', './ethereum/kriptal/src/test/**/*.sol') }}
          restore-keys: ${{ runner.os }}-foundry