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release notes

Initial Release

  • Initial release on 10/6/2021


  • Upstreamed Protect API into a service that is more tightly coupled to the Flashbots Relay. As part of this migration cancellations are temporarily not supported.
  • Released status API that can be used to check the status of transactions.
  • Spun off Protect API, webSDK, and gas fees calculator into standalone services.


  • Refactored RPC and introduced persisent state, which is now stored in a database. This will improve UX when upgrading the RPC or during any potential downtime.
  • Introduced the ability to cancel the further submission of transactions sent via Flashbots Protect RPC.