class Store implements UpdatableStore {

  @Override
  public SafeFuture<Optional<BeaconState>> retrieveCheckpointState(Checkpoint checkpoint) {
    return checkpointStates.perform(new CheckpointStateTask(checkpoint, this::retrieveBlockState));
  }

  private  Store(
      final MetricsSystem metricsSystem,
      int hotStatePersistenceFrequencyInEpochs,
      final BlockProvider blockProvider,
      final StateAndBlockProvider stateAndBlockProvider,
      final CachingTaskQueue<Bytes32, SignedBlockAndState> states,
      final UInt64 time,
      final UInt64 genesis_time,
      final Checkpoint justified_checkpoint,
      final Checkpoint finalized_checkpoint,
      final Checkpoint best_justified_checkpoint,
      final BlockTree blockTree,
      final SignedBlockAndState finalizedBlockAndState,
      final Map<UInt64, VoteTracker> votes,
      final Map<Bytes32, SignedBeaconBlock> blocks,
      final CachingTaskQueue<Checkpoint, BeaconState> checkpointStates);

}