Block details.
Epoch: 123 Number of transactions in block: 4 slot_no: 2669237 epoch_slot_no: 12437 block_no: 2667721 slot_leader_id: 12 size: 3185 time: 2019-06-03 18:50:31 proto_major: 0 proto_minor: 2 hash: \xd58854c94cddeffd772f013863e80144efb8d320f66d90cf9b2ad001c0c813aaBlock Operator
vrf_key: op_cert: op_cert_counter: