def PrivateKeyFromWIF(wif):
"""
Get the private key from a WIF key
Args:
wif (str): The wif key
Returns:
bytes: The private key
Raises:
ValueError:
if the input `wif` length != 52
if the input `wif` has an invalid format
if the input `wif` has an invalid checksum
"""
if wif is None or len(wif) is not 52:
raise ValueError(
'Please provide a wif with a length of 52 bytes (LEN: {0:d})'.
format(len(wif)))
data = base58.b58decode(wif)
length = len(data)
if length is not 38 or data[0] is not 0x80 or data[33] is not 0x01:
raise ValueError("Invalid format!")
checksum = Crypto.Hash256(data[0:34])[0:4]
if checksum != data[34:]:
raise ValueError("Invalid WIF Checksum!")
return data[1:33]
def Hash(self):
"""
Get the hash of the transaction.
Returns:
UInt256:
"""
if not self.__hash:
ba = bytearray(binascii.unhexlify(self.GetHashData()))
hash = Crypto.Hash256(ba)
self.__hash = UInt256(data=hash)
return self.__hash
