Block details.
Epoch: 30 Number of transactions in block: 2 slot_no: 668899 epoch_slot_no: 20899 block_no: 668822 slot_leader_id: 6 size: 6816 time: 2018-02-25 17:51:11 proto_major: 0 proto_minor: 1 hash: \x3366e91729720ae0a6debcf0a090f42d6ea761d69414066153d771070542de7aBlock Operator
vrf_key: op_cert: op_cert_counter: