def deserialize_unsigned(self, reader: serialization.BinaryReader) -> None:
self.version = reader.read_uint32()
self.prev_hash = reader.read_serializable(types.UInt256)
self.merkle_root = reader.read_serializable(types.UInt256)
self.timestamp = reader.read_uint64()
self.index = reader.read_uint32()
self.next_consensus = reader.read_serializable(types.UInt160)
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(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream.
Args:
reader: instance.
"""
self.hash_start = reader.read_serializable(types.UInt256)
self.count = reader.read_int16()
def deserialize_unsigned(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream excluding the validation byte + witness.
Args:
reader: instance.
"""
self.version = reader.read_uint32()
self.prev_hash = reader.read_serializable(types.UInt256)
self.block_index = reader.read_uint32()
self.validator_index = reader.read_uint16()
self.data = reader.read_var_bytes()
def deserialize(self, reader: serialization.BinaryReader) -> None:
self.magic = reader.read_uint32()
self.compiler = reader.read_bytes(32).decode('utf-8')
self.version = Version.deserialize_from_bytes(reader.read_bytes(16))
self.script_hash = reader.read_serializable(types.UInt160)
self.checksum = reader.read_bytes(4)
if self.checksum != self.compute_checksum():
raise ValueError("Deserialization error - invalid checksum")
self.script = reader.read_var_bytes()
if self.script_hash != self.compute_script_hash():
raise ValueError("Deserialization error - invalid script_hash")
def deserialize(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream.
Args:
reader: instance.
Raises:
ValueError: if the validation byte is not 1
"""
self.deserialize_unsigned(reader)
if reader.read_uint8() != 1:
raise ValueError("Deserialization error - validation byte not 1")
self.witness = reader.read_serializable(payloads.Witness)
def deserialize(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream.
Args:
reader: instance.
"""
self.account = reader.read_serializable(types.UInt160)
self.scope = payloads.WitnessScope(reader.read_uint8())
if payloads.WitnessScope.CUSTOM_CONTRACTS in self.scope:
self.allowed_contracts = reader.read_serializable_list(
types.UInt160)
if payloads.WitnessScope.CUSTOM_GROUPS in self.scope:
self.allowed_groups = reader.read_serializable_list(
cryptography.EllipticCurve.ECPoint)
def deserialize(self, reader: serialization.BinaryReader) -> None:
"""
Deserialize the object from a binary stream.
Args:
reader: instance.
Raises:
ValueError: if no witnesses are found.
"""
self.deserialize_unsigned(reader)
witness_obj_count = reader.read_uint8()
if witness_obj_count != 1:
raise ValueError(
f"Deserialization error - Witness object count is {witness_obj_count} must be 1"
)
self.witness = reader.read_serializable(payloads.Witness)
def deserialize_unsigned(self, reader: serialization.BinaryReader) -> None:
self.version = reader.read_uint8()
if self.version > 0:
raise ValueError("Deserialization error - invalid version")
self.nonce = reader.read_uint32()
self.sender = reader.read_serializable(types.UInt160)
self.system_fee = reader.read_int64()
if self.system_fee < 0:
raise ValueError("Deserialization error - negative system fee")
self.network_fee = reader.read_int64()
if self.network_fee < 0:
raise ValueError("Deserialization error - negative network fee")
# Impossible overflow, only applicable to the C# implementation where they use longs
# if (self.system_fee + self.network_fee < self.system_fee):
# raise ValueError("Deserialization error - overflow")
self.valid_until_block = reader.read_uint32()
self.attributes = reader.read_serializable_list(TransactionAttribute)
self.cosigners = reader.read_serializable_list(payloads.Cosigner)
self.script = reader.read_var_bytes(max=65535)
if len(self.script) == 0:
raise ValueError("Deserialization error - invalid script length 0")
def deserialize(self, reader: serialization.BinaryReader) -> None:
super(TrimmedBlock, self).deserialize(reader)
self.hashes = reader.read_serializable_list(types.UInt256)
if len(self.hashes) > 0:
self.consensus_data = reader.read_serializable(
payloads.ConsensusData)
def deserialize(self, reader: serialization.BinaryReader) -> None:
self.contract = reader.read_serializable(types.UInt160)
self.key = reader.read_bytes_with_grouping(group_size=16)
def deserialize(self, reader: BinaryReader) -> None:
self.script = reader.read_var_bytes()
self.manifest = reader.read_serializable(manifest.ContractManifest)