def encode(msg: Message) -> bytes:
"""
Encode a 'MlTrade' message into bytes.
:param msg: the message object.
:return: the bytes.
"""
msg = cast(MlTradeMessage, msg)
message_pb = ProtobufMessage()
dialogue_message_pb = DialogueMessage()
ml_trade_msg = ml_trade_pb2.MlTradeMessage()
dialogue_message_pb.message_id = msg.message_id
dialogue_reference = msg.dialogue_reference
dialogue_message_pb.dialogue_starter_reference = dialogue_reference[0]
dialogue_message_pb.dialogue_responder_reference = dialogue_reference[
1]
dialogue_message_pb.target = msg.target
performative_id = msg.performative
if performative_id == MlTradeMessage.Performative.CFP:
performative = ml_trade_pb2.MlTradeMessage.Cfp_Performative(
) # type: ignore
query = msg.query
Query.encode(performative.query, query)
ml_trade_msg.cfp.CopyFrom(performative)
elif performative_id == MlTradeMessage.Performative.TERMS:
performative = ml_trade_pb2.MlTradeMessage.Terms_Performative(
) # type: ignore
terms = msg.terms
Description.encode(performative.terms, terms)
ml_trade_msg.terms.CopyFrom(performative)
elif performative_id == MlTradeMessage.Performative.ACCEPT:
performative = ml_trade_pb2.MlTradeMessage.Accept_Performative(
) # type: ignore
terms = msg.terms
Description.encode(performative.terms, terms)
tx_digest = msg.tx_digest
performative.tx_digest = tx_digest
ml_trade_msg.accept.CopyFrom(performative)
elif performative_id == MlTradeMessage.Performative.DATA:
performative = ml_trade_pb2.MlTradeMessage.Data_Performative(
) # type: ignore
terms = msg.terms
Description.encode(performative.terms, terms)
payload = msg.payload
performative.payload = payload
ml_trade_msg.data.CopyFrom(performative)
else:
raise ValueError(
"Performative not valid: {}".format(performative_id))
dialogue_message_pb.content = ml_trade_msg.SerializeToString()
message_pb.dialogue_message.CopyFrom(dialogue_message_pb)
message_bytes = message_pb.SerializeToString()
return message_bytes
def decode(obj: bytes) -> Message:
"""
Decode bytes into a 'MlTrade' message.
:param obj: the bytes object.
:return: the 'MlTrade' message.
"""
message_pb = ProtobufMessage()
ml_trade_pb = ml_trade_pb2.MlTradeMessage()
message_pb.ParseFromString(obj)
message_id = message_pb.dialogue_message.message_id
dialogue_reference = (
message_pb.dialogue_message.dialogue_starter_reference,
message_pb.dialogue_message.dialogue_responder_reference,
)
target = message_pb.dialogue_message.target
ml_trade_pb.ParseFromString(message_pb.dialogue_message.content)
performative = ml_trade_pb.WhichOneof("performative")
performative_id = MlTradeMessage.Performative(str(performative))
performative_content = dict() # type: Dict[str, Any]
if performative_id == MlTradeMessage.Performative.CFP:
pb2_query = ml_trade_pb.cfp.query
query = Query.decode(pb2_query)
performative_content["query"] = query
elif performative_id == MlTradeMessage.Performative.TERMS:
pb2_terms = ml_trade_pb.terms.terms
terms = Description.decode(pb2_terms)
performative_content["terms"] = terms
elif performative_id == MlTradeMessage.Performative.ACCEPT:
pb2_terms = ml_trade_pb.accept.terms
terms = Description.decode(pb2_terms)
performative_content["terms"] = terms
tx_digest = ml_trade_pb.accept.tx_digest
performative_content["tx_digest"] = tx_digest
elif performative_id == MlTradeMessage.Performative.DATA:
pb2_terms = ml_trade_pb.data.terms
terms = Description.decode(pb2_terms)
performative_content["terms"] = terms
payload = ml_trade_pb.data.payload
performative_content["payload"] = payload
else:
raise ValueError(
"Performative not valid: {}.".format(performative_id))
return MlTradeMessage(message_id=message_id,
dialogue_reference=dialogue_reference,
target=target,
performative=performative,
**performative_content)