In addition to the Flashbots Goerli relay, now also the Flashbots Sepolia relay allows block submissions from external builders 🎉
Sepolia relay block submission endpoints:
getValidators: https://builder-relay-sepolia.flashbots.net/relay/v1/builder/validators (GET) - array of proposer preferences for registered validators with assigned duties in the current and next epochsubmitBlock: https://builder-relay-sepolia.flashbots.net/relay/v1/builder/blocks (POST)
See also:
- Relay API documentation - Block Builder API
- Block Builder Self-Help Group: https://collective.flashbots.net/c/builders/14
- Github issue about becoming block builder: https://github.com/flashbots/mev-boost/issues/145
- Instructions for submitting blocks to the Flashbots Goerli relay
- https://github.com/flashbots/boost-geth-builder - an example builder implementation
Note: Submissions are currently rate-limited to 60 / minute.
⚡ If you have additional questions, please ask on GitHub or Discord!