def get_pubkey_at_path(self, path):
if not check_keypath(path):
raise BadArgumentError("Invalid keypath")
path = path[2:]
path = path.replace("h", "'")
path = path.replace("H", "'")
# This call returns raw uncompressed pubkey, chaincode
pubkey = self.app.getWalletPublicKey(path)
if path != "":
parent_path = ""
for ind in path.split("/")[:-1]:
parent_path += ind + "/"
parent_path = parent_path[:-1]
# Get parent key fingerprint
parent = self.app.getWalletPublicKey(parent_path)
fpr = hash160(compress_public_key(parent["publicKey"]))[:4]
# Compute child info
childstr = path.split("/")[-1]
hard = 0
if childstr[-1] == "'" or childstr[-1] == "h" or childstr[
-1] == "H":
childstr = childstr[:-1]
hard = 0x80000000
child = struct.pack(">I", int(childstr) + hard)
# Special case for m
else:
child = bytearray.fromhex("00000000")
fpr = child
chainCode = pubkey["chainCode"]
publicKey = compress_public_key(pubkey["publicKey"])
depth = len(path.split("/")) if len(path) > 0 else 0
depth = struct.pack("B", depth)
if self.is_testnet:
version = bytearray.fromhex("043587CF")
else:
version = bytearray.fromhex("0488B21E")
extkey = version + depth + fpr + child + chainCode + publicKey
checksum = hash256(extkey)[:4]
xpub = base58.encode(extkey + checksum)
result = {"xpub": xpub}
if self.expert:
xpub_obj = ExtendedKey()
xpub_obj.deserialize(xpub)
result.update(xpub_obj.get_printable_dict())
return result
def get_pubkey_at_path(self, path):
self._check_unlocked()
try:
expanded_path = tools.parse_path(path)
except ValueError as e:
raise BadArgumentError(str(e))
output = btc.get_public_node(self.client, expanded_path, coin_name=self.coin_name)
if self.is_testnet:
result = {'xpub': xpub_main_2_test(output.xpub)}
else:
result = {'xpub': output.xpub}
if self.expert:
xpub_obj = ExtendedKey()
xpub_obj.deserialize(output.xpub)
result.update(xpub_obj.get_printable_dict())
return result