def get_xpubkeys(self, for_change, n):
# unsorted
s = ''.join(map(lambda x: bitcoin.int_to_hex(x, 2), (for_change, n)))
xpubs = self.get_master_pubkeys()
return map(
lambda xpub: 'ff' + bitcoin.DecodeBase58Check(xpub).encode('hex') +
s, xpubs)
def from_xpub(cls, xpub):
decoded = bitcoin.DecodeBase58Check(xpub)
if decoded == None: raise Exception('BIP32.from_xpub: invalid xpub')
if decoded[:4] != '0488b21e'.decode('hex'):
raise Exception('BIP32.from_xpub: not proper xpub')
depth = int(decoded[4:5].encode('hex'), 16)
fingerprint = decoded[5:9]
child_num = int(decoded[9:13].encode('hex'), 16)
if child_num & 2**31:
is_hard = True
child_num = child_num & ((2**31) - 1)
else:
is_hard = False
chaincode = decoded[13:45]
privkey = None
pubkey = decoded[45:]
is_private = False
return cls(privkey, pubkey, chaincode, depth, fingerprint, child_num,
is_private, is_hard)
def DeserializeExtendedKey(s):
"""Decode 78-byte binary blob corresponding to this node."""
data = bitcoin.DecodeBase58Check(s)
(is_private, is_test) = VERSION__PRIVATE_TEST_LOOKUP[data[0:4]]
parent_fingerprint = data[5:9]
child_number, = struct.unpack(">L", data[9:13])
d = dict(is_private=is_private,
is_test=is_test,
chain_code=data[13:45],
depth=ord(data[4]),
parent_fingerprint=parent_fingerprint,
child_number=child_number)
if is_private:
if ord(data[45]) != 0:
raise Exception("incorrect private key encoding")
d['secret'] = data[46:]
else:
Q = bitcoin.ser_to_point(data[45:])
pubkey = ecdsa.VerifyingKey.from_public_point(Q, curve=SECP256k1)
d['K'] = pubkey.to_string()
d['cK'] = bitcoin.GetPubKey(pubkey.pubkey, True)
return d
def get_xpubkey(self, c, i):
s = ''.join(map(lambda x: bitcoin.int_to_hex(x, 2), (c, i)))
return 'ff' + bitcoin.DecodeBase58Check(self.xpub).encode('hex') + s
