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Block Engine

The following parties interacts with the block engine are:

Searchers

  • SubscribePendingTransactions: subscribe to pending transactions from the relayer by sending a list containing accounts of interest. The block engine will forward any transactions that write-lock the accounts mentioned. Transactions have a timeout attached at which point they may get confirmed on-chain.
  • SendBundle: send a list of transactions
  • GetNextScheduledLeader, GetConnectedLeaders, GetTipAccounts: access information about connected validators and tip accounts.

Validators

  • SubscribePackets: receive transactions received by our system
  • SubscribeBundles: receive high-value and simulated bundles that contain MEV payment

Relayers

  • SubscribeAccountsOfInterest: relayers receive a union of all of the accounts searchers are interested in.
  • StartExpiringPacketStream: relayers send packets that have