def empty(cls, rep: ExternalAddress, block_height: int):
return cls(rep, 0, Signature.empty(), block_height, Hash32.empty())
def empty(cls, rep: ExternalAddress, block_height: int, round_: int,
old_leader: ExternalAddress):
return cls(rep, 0, Signature.empty(), block_height, round_, old_leader,
ExternalAddress.empty())