def from_extended_key_string(ekey_str):
'''Given an extended key string, such as
xpub6BsnM1W2Y7qLMiuhi7f7dbAwQZ5Cz5gYJCRzTNainXzQXYjFwtuQXHd
3qfi3t3KJtHxshXezfjft93w4UE7BGMtKwhqEHae3ZA7d823DVrL
return a (key, coin) pair. key is either a PubKey or PrivKey.
'''
return _from_extended_key(Base58.decode_check(ekey_str))
def test_from_extended_key():
# Tests the failure modes of from_extended_key.
with pytest.raises(TypeError):
bip32._from_extended_key('')
with pytest.raises(ValueError):
bip32._from_extended_key(b'')
with pytest.raises(CoinError):
bip32._from_extended_key(bytes(78))
# Invalid prefix byte
raw = Base58.decode_check(MXPRV)
with pytest.raises(ValueError):
bip32._from_extended_key(raw[:45] + b'\1' + raw[46:])
def pay_to_address_script(cls, address):
'''Return a pubkey script that pays to a pubkey hash.
Pass the address (either P2PKH or P2SH) in base58 form.
'''
raw = Base58.decode_check(address)
# Require version byte(s) plus hash160.
verbyte = -1
verlen = len(raw) - 20
if verlen > 0:
verbyte, hash160 = raw[:verlen], raw[verlen:]
if verbyte == cls.P2PKH_VERBYTE:
return cls.hash160_to_P2PKH_script(hash160)
if verbyte in cls.P2SH_VERBYTES:
return ScriptPubKey.P2SH_script(hash160)
raise CoinError('invalid address: {}'.format(address))
def extended_key_string(self, coin):
'''Return an extended key as a base58 string.'''
return Base58.encode_check(self.extended_key(coin))