replica-healthcheck is an express server to be run alongside a replica instance, to ensure that the replica is healthy. Currently, it exposes metrics on syncing stats and exits when the replica has a mismatched state root against the sequencer.
Clone, install, and build the Optimism monorepo:
git clone https://github.com/ethereum-optimism/optimism.git
yarn install
yarn build
Copy .env.example into a new file named .env, then set the environment variables listed there.
You can view a list of all environment variables and descriptions for each via:
yarn start --help
Once your environment variables have been set, run the relayer via:
yarn start