NewService initializes the backfill Service.

NewUpdater correctly initializes a StatusUpdater value with the required database value.

WithBatchSize configures the size of backfill batches, similar to the initial-sync block-batch-limit flag.

WithEnableBackfill toggles the entire backfill service on or off, intended to be used by a feature flag.

WithInitSyncWaiter sets a function on the service which will block until init-sync completes for the first time, or returns an error if context is canceled.

WithMinimumSlot allows the user to specify a different backfill minimum slot than the spec default of current - MIN_EPOCHS_FOR_BLOCK_REQUESTS.

WithVerifierWaiter sets the verification.InitializerWaiter for the backfill Service.

WithWorkerCount sets the number of goroutines in the batch processing pool that can concurrently make p2p requests to download data for batches.

ErrChainBroken indicates a backfill batch can't be imported to the db because it is not known to be the ancestor of the canonical chain.

Store provides a way to update and query the status of a backfill process that may be necessary to track when a node was initialized via checkpoint sync.

BeaconDB describes the set of DB methods that the StatusUpdater type needs to function.

InitializerWaiter is an interface that is satisfied by verification.InitializerWaiter.

PeerAssigner describes a type that provides an Assign method, which can assign the best peer to service an RPC blockRequest.

ServiceOption represents a functional option for the backfill service constructor.