def deserialize(self, reader: serialization.BinaryReader) -> None:
self.magic = reader.read_uint32()
compiler_with_version = reader.read_bytes(64).decode('utf-8')
self.compiler, version = compiler_with_version.rsplit('-', maxsplit=1)
self.version = Version.deserialize_from_bytes(
version[:32].encode('utf-8'))
assert reader.read_uint16() == 0 # 2 reserved bytes
reader.read_var_int(128) # TODO: method tokens
assert reader.read_uint16() == 0 # 2 reserved bytes
self.script = reader.read_var_bytes()
self.checksum = reader.read_bytes(4)
if self.checksum != self.compute_checksum():
raise ValueError("Deserialization error - invalid checksum")
def deserialize(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream.
Args:
reader: instance.
Raises:
ValueError: if the content count of the block is zero, or if there is a duplicate transaction in the list,
or if the merkle root does not included the calculated root.
"""
super(Block, self).deserialize(reader)
content_count = reader.read_var_int(max=self.MAX_CONTENTS_PER_BLOCK)
if content_count == 0:
raise ValueError("Deserialization error - no contents")
self.consensus_data = reader.read_serializable(payloads.ConsensusData)
tx_count = content_count - 1
for _ in range(tx_count):
self.transactions.append(
reader.read_serializable(payloads.Transaction))
if len(set(self.transactions)) != tx_count:
raise ValueError(
"Deserialization error - block contains duplicate transaction")
hashes = [t.hash() for t in self.transactions]
if Block.calculate_merkle_root(self.consensus_data.hash(),
hashes) != self.merkle_root:
raise ValueError("Deserialization error - merkle root mismatch")
def deserialize_binary(reader: BinaryReader) -> Any:
deserialized_items = []
underserialized = 1
while underserialized > 0:
stack_type = reader.read_byte()
if stack_type == StackItemType.Any:
deserialized_items.append(None)
elif stack_type == StackItemType.Boolean:
deserialized_items.append(reader.read_bool())
elif stack_type == StackItemType.Integer:
value_in_bytes = reader.read_var_bytes()
deserialized_items.append(Integer.from_bytes(value_in_bytes))
elif stack_type in (StackItemType.ByteString, StackItemType.Buffer):
deserialized_items.append(reader.read_var_bytes())
elif stack_type in (StackItemType.Array, StackItemType.Struct):
count = reader.read_var_int()
deserialized_items.append(list(range(count)))
underserialized += count
elif stack_type == StackItemType.Map:
count = reader.read_var_int()
deserialized_items.append({key: None for key in range(count)})
underserialized += count * 2
else:
raise ValueError
underserialized -= 1
stack_temp = []
while len(deserialized_items) > 0:
item = deserialized_items.pop()
if isinstance(item, list):
new_item = []
for _ in range(len(item)):
new_item.append(stack_temp.pop())
item = new_item
elif isinstance(item, dict):
new_item = {}
for _ in range(0, len(item), 2):
key = stack_temp.pop()
value = stack_temp.pop()
new_item[key] = value
item = new_item
stack_temp.append(item)
return stack_temp.pop()
def deserialize(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream.
Args:
reader: instance.
"""
self.primary_index = reader.read_var_int(max=1024) # comes from C#'s Clockchain.MaxValidators
self.nonce = reader.read_uint64()
def deserialize(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream.
Args:
reader: instance.
"""
super(MerkleBlockPayload, self).deserialize(reader)
self.content_count = reader.read_var_int()
self.hashes = reader.read_serializable_list(types.UInt256)
self.flags = reader.read_var_bytes()
def deserialize(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream.
Args:
reader: instance.
"""
addr_list_len = reader.read_var_int()
for i in range(0, addr_list_len):
nawt = NetworkAddress()
nawt.deserialize(reader)
self.addresses.append(nawt)
def deserialize(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream.
Args:
reader: instance.
"""
self.magic = reader.read_uint32()
self.version = reader.read_uint32()
self.timestamp = reader.read_uint32()
self.nonce = reader.read_uint32()
self.user_agent = reader.read_var_string(max=1024)
capabilities_cnt = reader.read_var_int(self.MAX_CAPABILITIES)
capabilities_list = []
for _ in range(capabilities_cnt):
capabilities_list.append(capabilities.NodeCapability.deserialize_from(reader))
self.capabilities = capabilities_list
def deserialize(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream.
Args:
reader: instance.
"""
self.timestamp = reader.read_uint32()
full_address_bytes = bytearray(reader.read_bytes(16))
ip_bytes = full_address_bytes[-4:]
host = '.'.join(map(lambda b: str(b), ip_bytes))
port = 0
capabilities_cnt = reader.read_var_int(VersionPayload.MAX_CAPABILITIES)
capabilities_list = []
for _ in range(capabilities_cnt):
capa = capabilities.NodeCapability.deserialize_from(reader)
if isinstance(capa, capabilities.ServerCapability):
port = capa.port
capabilities_list.append(capa)
self.capabilities = capabilities_list
self.address = f"{host}:{port}"