Transmits a group of transactions from a block to a peer.
blocktxn message is sent in response to a
getblocktxn message, and must include exactly the set of transactions requested, in the order requested (i.e. in the order they appear in the block).
|block hash||32 bytes||bytes||The hash of the block that contains the transactions to follow.|
|transaction count||variable||variable length integer||The number of transactions being provided.|
||The transactions, in order, serialized as though in a