def from_string(cls, string, net=Net):
'''Construct from an address string.'''
if len(string) > 35:
try:
return cls.from_cashaddr_string(string)
except ValueError as e:
raise AddressError(str(e))
try:
raw = base58_decode_check(string)
except ValueError as e:
raise AddressError(str(e))
# Require version byte(s) plus hash160.
if len(raw) != 21:
raise AddressError('invalid address: {}'.format(string))
verbyte, hash160_ = raw[0], raw[1:]
if verbyte == net.ADDRTYPE_P2PKH:
kind = cls.ADDR_P2PKH
elif verbyte == net.ADDRTYPE_P2SH:
kind = cls.ADDR_P2SH
else:
raise AddressError('unknown version byte: {}'.format(verbyte))
return cls(hash160_, kind)
def __init__(self, value):
if isinstance(value, str):
if len(value) == 40:
value = bytes.fromhex(value)
else:
value = base58_decode_check(value)[1:]
assert isinstance(value, bytes)
assert len(value) == 20
super().__init__(value)
def test_bip32_key_from_string_bad():
# Tests the failure modes of from_extended_key.
with pytest.raises(Base58Error):
bip32_key_from_string('')
with pytest.raises(ValueError):
bip32_key_from_string('1Po1oWkD2LmodfkBYiAktwh76vkF93LKnh')
with pytest.raises(TypeError):
bip32_key_from_string(b'')
with pytest.raises(Base58Error):
bip32_key_from_string(bytes(78).decode())
# Invalid prefix byte
raw = base58_decode_check(MXPRV)
bad_string = base58_encode_check(raw[:45] + b'\1' + raw[46:])
with pytest.raises(ValueError):
bip32_key_from_string(bad_string)
def get_xpubkey(self, c, i):
s = ''.join(int_to_hex(x,2) for x in (c, i))
return XPublicKey('ff' + base58_decode_check(self.xpub).hex() + s)