AggregatedAttReceived is sent after an aggregated attestation object has been received from the outside world.

ExitReceived is sent after an voluntary exit object has been received from the outside world (eg in RPC or sync).

UnaggregatedAttReceived is sent after an unaggregated attestation object has been received from the outside world.

AggregatedAttReceivedData is the data sent with AggregatedAttReceived events.

ExitReceivedData is the data sent with ExitReceived events.

UnAggregatedAttReceivedData is the data sent with UnaggregatedAttReceived events.

Notifier interface defines the methods of the service that provides beacon block operation updates to consumers.