def PrivateKeyFromWIF(wif):
"""
Get the private key from a WIF key
Args:
wif (str): The wif key
Returns:
bytes: The private key
"""
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 create_offer_hash(neo_address, offer_asset_hash, offer_asset_amt, want_asset_hash, want_asset_amt, txn_uuid):
reverse_user_hash = reverse_hex(neo_get_scripthash_from_address(neo_address))
reverse_offer_asset_hash = reverse_hex(offer_asset_hash)
reverse_offer_amount = num2hexstring(number=offer_asset_amt, size=8, little_endian=True)
reverse_want_asset_hash = reverse_hex(want_asset_hash)
reverse_want_amount = num2hexstring(number=want_asset_amt, size=8, little_endian=True)
nonce_hex = txn_uuid.encode('utf-8').hex()
offer_key_bytes = reverse_user_hash + reverse_offer_asset_hash + reverse_want_asset_hash + reverse_offer_amount +\
reverse_want_amount + nonce_hex
offer_hash = reverse_hex(Crypto.Hash256(binascii.a2b_hex(offer_key_bytes)).hex())
return offer_hash
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
def createTxid(txData):
ba = binascii.unhexlify(txData)
hash = Crypto.Hash256(ba)
return UInt256(data=hash).ToString()
