Flashbots Sepolia relay now accepts external block submissions
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Flashbots Sepolia relay now accepts external block submissions

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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 epoch
  • submitBlock: 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.

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⚡ If you have additional questions, please ask on GitHub or Discord!