IndexerTendermintBlock contains all the events for the block along with
metadata for the block height, timestamp of the block and a list of all the
hashes of the transactions within the block. The transaction hashes follow
the ordering of the transactions as they appear within the block.
IndexerTendermintEvent contains the base64 encoded event proto emitted from
the dYdX application as well as additional metadata to determine the ordering
of the event within the block and the subtype of the event.