def __init__(self):
    self.header = CBlockHeader()
    self.nonce = 0
    self.shortids_length = 0
    self.shortids = []
    self.prefilled_txn_length = 0
    self.prefilled_txn = []
def __init__(self):
    self.header = CBlockHeader()
    self.nonce = 0
    self.shortids_length = 0
    self.shortids = []
    self.prefilled_txn_length = 0
    self.prefilled_txn = []