def _validate_key_order(cls, keys: Sequence[bytes],
serialized_enr: Sequence[bytes]) -> None:
if keys != tuple(sorted(keys)):
raise DeserializationError(
f"ENR keys are not sorted: {b', '.join(keys).decode()}",
serialized_enr,
)
def deserialize(self, serial: bytes) -> str:
if (len(serial) > self.byte_length):
raise DeserializationError(
"Bytes too long, only need {}".format(self.byte_length),
serial
)
if len(serial) == 0 or serial[0] == 0:
raise DeserializationError(
"No leading zeros. And byte sequence length should be > 0",
serial
)
missing = self.byte_length - len(serial)
b_list = [0] * missing + [x for x in serial]
return super().deserialize(bytes(b_list))
def deserialize(self, serial: bytes) -> str:
if len(serial) != self.byte_length:
raise DeserializationError(
"Bytes should be {} long.".format(self.byte_length),
serial
)
return super().deserialize(serial)
def _validate_serialized_length(cls,
serialized_enr: Sequence[bytes]) -> None:
if len(serialized_enr) < 2:
raise DeserializationError(
"ENR must contain at least a signature and a sequence number",
serialized_enr,
)
num_keys_and_values = len(serialized_enr) - 2
if num_keys_and_values % 2 != 0:
raise DeserializationError(
"ENR must have exactly one value for each key", serialized_enr)
byte_size = sum(len(element) for element in serialized_enr)
if byte_size > MAX_ENR_SIZE:
raise DeserializationError(
f"ENRs must not be larger than {MAX_ENR_SIZE} bytes",
serialized_enr)
def deserialize(self, serial):
if serial == b'\x00':
return False
elif serial == b'\x01':
return True
else:
raise DeserializationError(
'Invalid serialized boolean. Must be either 0x01 or 0x00',
serial)
def _validate_key_uniqueness(cls, keys: Sequence[bytes],
serialized_enr: Sequence[bytes]) -> None:
duplicates = {
key
for key, num in collections.Counter(keys).items() if num > 1
}
if duplicates:
raise DeserializationError(
f"ENR contains the following duplicate keys: {b', '.join(duplicates).decode()}",
serialized_enr,
)
def deserialize(cls, encoded: bytes) -> SignedTransactionAPI:
if len(encoded) == 0:
raise DeserializationError(
"Encoded transaction was empty, which makes it invalid",
encoded,
)
if isinstance(encoded, bytes):
transaction_type = to_int(encoded[0])
if transaction_type == 1:
raise UnrecognizedTransactionType(transaction_type,
"TODO: Implement EIP-2930")
elif transaction_type in range(0, 0x80):
raise UnrecognizedTransactionType(transaction_type,
"Unknown transaction type")
else:
raise DeserializationError(
f"Typed Transaction must start with 0-0x7f, but got {hex(transaction_type)}",
encoded,
)
else:
return cls.legacy_signed.deserialize(encoded)
def deserialize(self, serial: bytes) -> bytes:
'''
De-serialize a RLP "item" back to bytes.
Parameters
----------
serial : bytes
The input.
Returns
-------
bytes
Original bytes.
Raises
------
DeserializationError
raise if input is not bytes.
'''
if not self.is_valid_type(serial):
raise DeserializationError(
'type of "serial" param is not right, bytes required.', serial)
return serial
def deserialize(self, serial) -> int:
'''
Deserialize bytes to int.
Parameters
----------
serial : [type]
bytes
Returns
-------
int
integer
Raises
------
DeserializationError
If bytes contain leading 0.
'''
if len(serial) > 0 and serial[0] == 0:
raise DeserializationError(
"Leading 0 should be removed from bytes",
serial
)
# add leading 0 to bytes sequence if width is set.
if self.max_bytes:
byte_list = [x for x in serial]
length = len(byte_list)
missed = self.max_bytes - length
if missed:
byte_list = [0] * missed + byte_list
serial2 = bytes(byte_list)
else:
serial2 = serial
return super().deserialize(serial2)
def deserialize(obj):
raise DeserializationError("not yet implemented", obj)
