def serialize(self, obj):
if not self.is_valid_type(obj):
raise SerializationError(
'Object is not a serializable ({})'.format(type(obj)), obj)
if not self.is_valid_length(len(obj)):
raise SerializationError('Object has invalid length', obj)
return obj.encode(self.encoding)
def serialize(self, obj: Union[str, int]) -> bytes:
'''
Serialize the object into a RLP encode-able "item".
Parameters
----------
obj : Union[str, int]
obj is either number in string or number int.
'''
if not (_is_pure_str(obj) or _is_pure_int(obj)):
raise SerializationError("The input is not str nor int.", obj)
number = None
if _is_pure_str(obj):
if _is_hex_string(obj):
number = int(obj, 16)
if _is_decimal_string(obj):
number = int(obj)
if _is_pure_int(obj):
number = obj
# remove leading 0 from bytes sequence.
result_bytes = super().serialize(number)
byte_list = [x for x in result_bytes if x != 0]
return bytes(byte_list)
def serialize(obj):
try:
cls = Transaction.exclude(['metadata']) if obj.metadata is None else Transaction
field_value = [getattr(obj, field) for field, _ in cls.fields]
ret = cls.get_sedes().serialize(field_value)
return ret
except Exception as e:
raise SerializationError(e.format_exc, obj)
def serialize(self, obj: str) -> bytes:
# 0x counts for 2 chars. 1 bytes = 2 hex char.
allowed_hex_length = self.byte_length * 2 + 2
if len(obj) != allowed_hex_length:
raise SerializationError(
"Max allowed string length {}".format(allowed_hex_length), obj)
return super().serialize(obj)
def serialize(self, obj):
if not isinstance(obj, bool):
raise SerializationError('Can only serialize bool', obj)
if obj is False:
return b'\x00'
elif obj is True:
return b'\x01'
else:
raise Exception("Invariant: no other options for boolean values")
def serialize(self, obj):
if isinstance(obj, bool) or not isinstance(obj, int):
raise SerializationError('Can only serialize integers', obj)
if self.l is not None and obj >= 256**self.l:
raise SerializationError(
'Integer too large (does not fit in {} '
'bytes)'.format(self.l), obj)
if obj < 0:
raise SerializationError('Cannot serialize negative integers', obj)
if obj == 0:
s = b''
else:
s = int_to_big_endian(obj)
if self.l is not None:
return b'\x00' * max(0, self.l - len(s)) + s
else:
return s
def serialize(self, obj: str) -> bytes:
'''
Serialize a '0x...' string to bytes.
Parameters
----------
obj : str
'0x...' style string.
Returns
-------
bytes
the "item" that can be rlp encodeded.
'''
if not _is_hex_string(obj):
raise SerializationError('expect 0x... style string', obj)
if len(obj) % 2 != 0:
raise SerializationError(
'expect 0x... style string of even length.', obj)
obj2 = obj[2:] # remove '0x'
return bytes.fromhex(obj2)
def serialize(self, obj: bytes) -> bytes:
'''
Serialize the object into a RLP encode-able "item".
Parameters
----------
obj : bytes
The input.
Returns
-------
bytes
The "item" in bytes.
Raises
------
SerializationError
raise if input is not bytes.
'''
if not self.is_valid_type(obj):
raise SerializationError(
'type of "obj" param is not right, bytes required.', obj)
return obj
def serialize(obj):
if not serializable(obj):
raise SerializationError('Can only serialize nested lists of strings',
obj)
return obj