def _validate_outputs(self) -> None:
if 'outputs' not in self.request:
raise InvalidSignatureRequest("no outputs")
self.outputs = self.request['outputs']
if not isinstance(self.outputs, list):
raise InvalidSignatureRequest("outputs is not an array")
if len(self.outputs) == 0:
raise InvalidSignatureRequest("at least one output is required")
for output in self.outputs:
self._validate_output(output)
def _validate_output(self, output: Dict) -> None:
if 'address' not in output:
raise InvalidSignatureRequest("no address in output")
if not isinstance(output['address'], (str, )):
err_msg = "output addresses must be base58-encoded strings"
raise InvalidSignatureRequest(err_msg)
if output['address'][:2] in ('bc', 'tb'):
err_msg = "bech32 addresses are unsupported (output)"
raise InvalidSignatureRequest(err_msg)
try:
base58.CBase58Data(output['address'])
except base58.InvalidBase58Error:
err_msg = "output addresses must be base58-encoded strings"
raise InvalidSignatureRequest(err_msg)
except base58.Base58ChecksumError:
err_msg = "invalid output address checksum"
raise InvalidSignatureRequest(err_msg)
try:
CBitcoinAddress(output['address'])
except CBitcoinAddressError:
err_msg = "invalid output address (check mainnet vs. testnet)"
raise InvalidSignatureRequest(err_msg)
if 'amount' not in output:
raise InvalidSignatureRequest("no amount in output")
if type(output['amount']) != int:
err_msg = "output amount must be an integer (satoshis)"
raise InvalidSignatureRequest(err_msg)
if output['amount'] <= 0:
raise InvalidSignatureRequest("invalid output amount")
def _validate_input(self, input: Dict) -> None:
if 'amount' not in input:
raise InvalidSignatureRequest("no amount in input")
if type(input['amount']) != int:
err_msg = "input amount must be an integer (satoshis)"
raise InvalidSignatureRequest(err_msg)
if input['amount'] <= 0:
raise InvalidSignatureRequest("invalid input amount")
if 'txid' not in input:
raise InvalidSignatureRequest("no txid in input")
if len(input['txid']) != 64:
raise InvalidSignatureRequest("txid must be 64 characters")
try:
binascii.unhexlify(input['txid'].encode('utf8'))
except ValueError:
err_msg = "input TXIDs must be hexadecimal strings"
raise InvalidSignatureRequest(err_msg)
if 'index' not in input:
raise InvalidSignatureRequest("no index in input")
if type(input['index']) != int:
err_msg = "input index must be an integer"
raise InvalidSignatureRequest(err_msg)
if input['index'] < 0:
raise InvalidSignatureRequest("invalid input index")
def _validate_input_groups(self) -> None:
if 'inputs' not in self.request:
raise InvalidSignatureRequest("no input groups")
input_groups = self.request['inputs']
if not isinstance(input_groups, list):
raise InvalidSignatureRequest("input groups is not an array")
if len(input_groups) == 0:
raise InvalidSignatureRequest(
"at least one input group is required")
self.inputs = []
for input_group in input_groups:
self._validate_input_group(input_group)
def decode_qr_code_data(encoded: bytes) -> str:
try:
compressed_bytes = b32decode(encoded)
try:
decompressed_bytes = decompress(compressed_bytes)
try:
data = decompressed_bytes.decode('utf-8')
return data
except UnicodeError:
raise InvalidSignatureRequest("Not valid UTF-8")
except LZMAError:
raise InvalidSignatureRequest("Not LZMA compressed")
except (TypeError, Base32DecodeError):
raise InvalidSignatureRequest("Not Base32")
def encode_qr_code_data(decoded: str) -> bytes:
try:
uncompressed_bytes = decoded.encode('utf-8')
try:
compressed_bytes = compress(uncompressed_bytes,
format=FORMAT_ALONE)
try:
data = b32encode(compressed_bytes)
return data
except TypeError:
raise InvalidSignatureRequest("Failed to Base32-encode")
except LZMAError:
raise InvalidSignatureRequest("Failed to LZMA-compress")
except UnicodeError:
raise InvalidSignatureRequest("Failed to encode as UTF-8")
def decode_qr_code_data(encoded: bytes) -> str:
if not isinstance(encoded, (bytes,)):
raise InvalidSignatureRequest("Can only decode bytes")
if encoded == b'':
raise InvalidSignatureRequest("Cannot decode empty bytes")
try:
compressed_bytes = b32decode(encoded)
try:
decompressed_bytes = decompress(compressed_bytes)
try:
data = decompressed_bytes.decode('utf-8')
return data
except UnicodeError:
raise InvalidSignatureRequest("Not valid UTF-8")
except OSError:
raise InvalidSignatureRequest("Not gzipped")
except (TypeError, Base32DecodeError):
raise InvalidSignatureRequest("Not Base32")
def encode_qr_code_data(decoded: str) -> bytes:
if not isinstance(decoded, (str,)):
raise InvalidSignatureRequest("Can only encode strings")
if decoded.strip() == '':
raise InvalidSignatureRequest("Cannot encode empty string")
try:
uncompressed_bytes = decoded.encode('utf-8')
try:
compressed_bytes = compress(uncompressed_bytes)
try:
data = b32encode(compressed_bytes)
return data
except TypeError:
raise InvalidSignatureRequest("Failed to Base32-encode")
except OSError:
raise InvalidSignatureRequest("Failed to gzip")
except UnicodeError:
raise InvalidSignatureRequest("Failed to encode as UTF-8")
def _validate_input_group(self, input_group: list) -> None:
if len(input_group) < 3:
raise InvalidSignatureRequest(
"input group must include redeem script, BIP32 path, and at least one input"
)
redeem_script = input_group[0]
self._validate_redeem_script(redeem_script)
bip32_path = input_group[1]
self.validate_bip32_path(bip32_path)
address = generate_multisig_address(redeem_script, self.testnet)
for input in input_group[2:]:
self._validate_input(input)
input['redeem_script'] = redeem_script
input['bip32_path'] = bip32_path
input['address'] = address
self.inputs.append(input)
def _validate_fee(self) -> None:
sum_inputs = sum([input['amount'] for input in self.inputs])
sum_outputs = sum([output['amount'] for output in self.outputs])
self.fee = sum_inputs - sum_outputs
if self.fee < 0:
raise InvalidSignatureRequest("fee cannot be negative")
def _validate_redeem_script(self, redeem_script: bytes) -> None:
try:
binascii.unhexlify(redeem_script.encode('utf8'))
except (ValueError, AttributeError):
raise InvalidSignatureRequest("redeem script is not valid hex")
def test_InvalidSignatureRequest_raisable_with_message(self):
with pytest.raises(InvalidSignatureRequest) as e_info:
raise InvalidSignatureRequest("test")
assert str(e_info.value) == "Invalid signature request: test."