def _handle_cft(self, ml_trade_msg: MlTradeMessage,
ml_trade_dialogue: MlTradeDialogue) -> None:
"""
Handle call for terms.
:param ml_trade_msg: the ml trade message
:param ml_trade_dialogue: the dialogue object
:return: None
"""
query = ml_trade_msg.query
self.context.logger.info("got a Call for Terms from {}.".format(
ml_trade_msg.counterparty[-5:]))
strategy = cast(Strategy, self.context.strategy)
if not strategy.is_matching_supply(query):
self.context.logger.info("query does not match supply.")
return
terms = strategy.generate_terms()
self.context.logger.info(
"sending to the address={} a Terms message: {}".format(
ml_trade_msg.counterparty[-5:], terms.values))
terms_msg = MlTradeMessage(
performative=MlTradeMessage.Performative.TERMS,
dialogue_reference=ml_trade_dialogue.dialogue_label.
dialogue_reference,
message_id=ml_trade_msg.message_id + 1,
target=ml_trade_msg.message_id,
terms=terms,
)
terms_msg.counterparty = ml_trade_msg.counterparty
ml_trade_dialogue.update(terms_msg)
self.context.outbox.put_message(message=terms_msg)
def _handle_accept(self, ml_trade_msg: MlTradeMessage,
ml_trade_dialogue: MlTradeDialogue) -> None:
"""
Handle accept.
:param ml_trade_msg: the ml trade message
:param ml_trade_dialogue: the dialogue object
:return: None
"""
terms = ml_trade_msg.terms
self.context.logger.info("got an Accept from {}: {}".format(
ml_trade_msg.counterparty[-5:], terms.values))
strategy = cast(Strategy, self.context.strategy)
if not strategy.is_valid_terms(terms):
self.context.logger.info("terms are not valid.")
return
data = strategy.sample_data(terms.values["batch_size"])
self.context.logger.info(
"sending to address={} a Data message: shape={}".format(
ml_trade_msg.counterparty[-5:], data[0].shape))
payload = pickle.dumps(data) # nosec
data_msg = MlTradeMessage(
performative=MlTradeMessage.Performative.DATA,
dialogue_reference=ml_trade_dialogue.dialogue_label.
dialogue_reference,
message_id=ml_trade_msg.message_id + 1,
target=ml_trade_msg.message_id,
terms=terms,
payload=payload,
)
data_msg.counterparty = ml_trade_msg.counterparty
ml_trade_dialogue.update(data_msg)
self.context.outbox.put_message(message=data_msg)
def test_terms_serialization():
"""Test the serialization for 'terms' speech-act works."""
msg = MlTradeMessage(
message_id=2,
target=1,
performative=MlTradeMessage.Performative.TERMS,
terms=Description({
"foo1": 1,
"bar1": 2
}),
)
msg.to = "receiver"
envelope = Envelope(
to=msg.to,
sender="sender",
message=msg,
)
envelope_bytes = envelope.encode()
actual_envelope = Envelope.decode(envelope_bytes)
expected_envelope = envelope
assert expected_envelope.to == actual_envelope.to
assert expected_envelope.sender == actual_envelope.sender
assert (expected_envelope.protocol_specification_id ==
actual_envelope.protocol_specification_id)
assert expected_envelope.message != actual_envelope.message
actual_msg = MlTradeMessage.serializer.decode(actual_envelope.message)
actual_msg.to = actual_envelope.to
actual_msg.sender = actual_envelope.sender
expected_msg = msg
assert expected_msg == actual_msg
def test_data_serialization():
"""Test the serialization for 'data' speech-act works."""
msg = MlTradeMessage(
performative=MlTradeMessage.Performative.DATA,
terms=Description({
"foo1": 1,
"bar1": 2
}),
payload=b"some_payload",
)
msg.to = "receiver"
envelope = Envelope(
to=msg.to,
sender="sender",
protocol_id=MlTradeMessage.protocol_id,
message=msg,
)
envelope_bytes = envelope.encode()
actual_envelope = Envelope.decode(envelope_bytes)
expected_envelope = envelope
assert expected_envelope.to == actual_envelope.to
assert expected_envelope.sender == actual_envelope.sender
assert expected_envelope.protocol_id == actual_envelope.protocol_id
assert expected_envelope.message != actual_envelope.message
actual_msg = MlTradeMessage.serializer.decode(actual_envelope.message)
actual_msg.to = actual_envelope.to
actual_msg.sender = actual_envelope.sender
expected_msg = msg
assert expected_msg == actual_msg
def test_accept_serialization():
"""Test the serialization for 'accept' speech-act works."""
msg = MlTradeMessage(
performative=MlTradeMessage.Performative.ACCEPT,
terms=Description({
"foo1": 1,
"bar1": 2
}),
tx_digest="some_tx_digest",
)
msg.to = "receiver"
envelope = Envelope(
to=msg.to,
sender="sender",
message=msg,
)
envelope_bytes = envelope.encode()
actual_envelope = Envelope.decode(envelope_bytes)
expected_envelope = envelope
assert expected_envelope.to == actual_envelope.to
assert expected_envelope.sender == actual_envelope.sender
assert (expected_envelope.protocol_specification_id ==
actual_envelope.protocol_specification_id)
assert expected_envelope.message != actual_envelope.message
actual_msg = MlTradeMessage.serializer.decode(actual_envelope.message)
actual_msg.to = actual_envelope.to
actual_msg.sender = actual_envelope.sender
expected_msg = msg
assert expected_msg == actual_msg
def test_ml_messge_consistency():
"""Test the consistency of the message."""
dm = DataModel("ml_datamodel", [Attribute("dataset_id", str, True)])
query = Query([Constraint("dataset_id", ConstraintType("==", "fmnist"))], model=dm)
msg = MlTradeMessage(performative=MlTradeMessage.Performative.CFP, query=query)
with mock.patch.object(MlTradeMessage.Performative, "__eq__", return_value=False):
assert not msg._is_consistent()
def _handle_transaction_digest(
self, ledger_api_msg: LedgerApiMessage,
ledger_api_dialogue: LedgerApiDialogue) -> None:
"""
Handle a message of transaction_digest performative.
:param ledger_api_message: the ledger api message
:param ledger_api_dialogue: the ledger api dialogue
"""
ml_trade_dialogue = ledger_api_dialogue.associated_ml_trade_dialogue
self.context.logger.info(
"transaction was successfully submitted. Transaction digest={}".
format(ledger_api_msg.transaction_digest))
ml_trade_msg = cast(Optional[MlTradeMessage],
ml_trade_dialogue.last_incoming_message)
assert ml_trade_msg is not None, "Could not retrieve ml_trade message"
ml_accept = MlTradeMessage(
performative=MlTradeMessage.Performative.ACCEPT,
message_id=ml_trade_msg.message_id + 1,
dialogue_reference=ml_trade_dialogue.dialogue_label.
dialogue_reference,
target=ml_trade_msg.message_id,
tx_digest=ledger_api_msg.transaction_digest.body,
terms=ml_trade_msg.terms,
)
ml_accept.counterparty = ml_trade_msg.counterparty
ml_trade_dialogue.update(ml_accept)
self.context.outbox.put_message(message=ml_accept)
self.context.logger.info(
"informing counterparty={} of transaction digest={}.".format(
ml_trade_msg.counterparty[-5:],
ledger_api_msg.transaction_digest,
))
def _handle_search(self, oef_search_msg: OefSearchMessage,
oef_search_dialogue: OefSearchDialogue) -> None:
"""
Handle the search response.
:param agents: the agents returned by the search
:return: None
"""
if len(oef_search_msg.agents) == 0:
self.context.logger.info("found no agents, continue searching.")
return
self.context.logger.info("found agents={}, stopping search.".format(
list(map(lambda x: x[-5:], oef_search_msg.agents)), ))
strategy = cast(Strategy, self.context.strategy)
strategy.is_searching = False
query = strategy.get_service_query()
ml_trade_dialogues = cast(MlTradeDialogues,
self.context.ml_trade_dialogues)
for idx, opponent_address in enumerate(oef_search_msg.agents):
if idx >= strategy.max_negotiations:
continue
self.context.logger.info("sending CFT to agent={}".format(
opponent_address[-5:]))
cft_msg = MlTradeMessage(
performative=MlTradeMessage.Performative.CFP,
dialogue_reference=ml_trade_dialogues.
new_self_initiated_dialogue_reference(),
query=query,
)
cft_msg.counterparty = opponent_address
ml_trade_dialogues.update(cft_msg)
self.context.outbox.put_message(message=cft_msg)
def test_cfp_serialization():
"""Test the serialization for 'cfp' speech-act works."""
msg = MlTradeMessage(
performative=MlTradeMessage.Performative.CFP,
query=Query([Constraint("something", ConstraintType(">", 1))]),
)
msg.to = "receiver"
envelope = Envelope(
to=msg.to,
sender="sender",
message=msg,
)
envelope_bytes = envelope.encode()
actual_envelope = Envelope.decode(envelope_bytes)
expected_envelope = envelope
assert expected_envelope.to == actual_envelope.to
assert expected_envelope.sender == actual_envelope.sender
assert (expected_envelope.protocol_specification_id ==
actual_envelope.protocol_specification_id)
assert expected_envelope.message != actual_envelope.message
actual_msg = MlTradeMessage.serializer.decode(actual_envelope.message)
actual_msg.to = actual_envelope.to
actual_msg.sender = actual_envelope.sender
expected_msg = msg
assert expected_msg == actual_msg
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)
def _handle_accept(self, ml_trade_msg: MlTradeMessage) -> None:
"""
Handle accept.
:param ml_trade_msg: the ml trade message
:return: None
"""
terms = ml_trade_msg.terms
self.context.logger.info("Got an Accept from {}: {}".format(
ml_trade_msg.counterparty[-5:], terms.values))
strategy = cast(Strategy, self.context.strategy)
if not strategy.is_valid_terms(terms):
return
batch_size = terms.values["batch_size"]
data = strategy.sample_data(batch_size)
self.context.logger.info(
"[{}]: sending to address={} a Data message: shape={}".format(
self.context.agent_name, ml_trade_msg.counterparty[-5:],
data[0].shape))
payload = pickle.dumps(data) # nosec
data_msg = MlTradeMessage(
performative=MlTradeMessage.Performative.DATA,
terms=terms,
payload=payload)
self.context.outbox.put_message(
to=ml_trade_msg.counterparty,
sender=self.context.agent_address,
protocol_id=MlTradeMessage.protocol_id,
message=MlTradeSerializer().encode(data_msg),
)
def _handle_cft(self, ml_trade_msg: MlTradeMessage) -> None:
"""
Handle call for terms.
:param ml_trade_msg: the ml trade message
:return: None
"""
query = ml_trade_msg.query
self.context.logger.info(
"Got a Call for Terms from {}: query={}".format(
ml_trade_msg.counterparty[-5:], query))
strategy = cast(Strategy, self.context.strategy)
if not strategy.is_matching_supply(query):
return
terms = strategy.generate_terms()
self.context.logger.info(
"[{}]: sending to the address={} a Terms message: {}".format(
self.context.agent_name, ml_trade_msg.counterparty[-5:],
terms.values))
terms_msg = MlTradeMessage(
performative=MlTradeMessage.Performative.TERMS, terms=terms)
self.context.outbox.put_message(
to=ml_trade_msg.counterparty,
sender=self.context.agent_address,
protocol_id=MlTradeMessage.protocol_id,
message=MlTradeSerializer().encode(terms_msg),
)
def _handle_search(self, agents: Tuple[str, ...]) -> None:
"""
Handle the search response.
:param agents: the agents returned by the search
:return: None
"""
if len(agents) == 0:
self.context.logger.info(
"[{}]: found no agents, continue searching.".format(
self.context.agent_name))
return
self.context.logger.info(
"[{}]: found agents={}, stopping search.".format(
self.context.agent_name, list(map(lambda x: x[-5:], agents))))
strategy = cast(Strategy, self.context.strategy)
strategy.is_searching = False
query = strategy.get_service_query()
for opponent_address in agents:
self.context.logger.info("[{}]: sending CFT to agent={}".format(
self.context.agent_name, opponent_address[-5:]))
cft_msg = MlTradeMessage(
performative=MlTradeMessage.Performative.CFP, query=query)
self.context.outbox.put_message(
to=opponent_address,
sender=self.context.agent_address,
protocol_id=MlTradeMessage.protocol_id,
message=MlTradeSerializer().encode(cft_msg),
)
def test_ml_message_creation():
"""Test the creation of a ml message."""
dm = DataModel("ml_datamodel", [Attribute("dataset_id", str, True)])
query = Query([Constraint("dataset_id", ConstraintType("==", "fmnist"))],
model=dm)
msg = MlTradeMessage(performative=MlTradeMessage.Performative.CFP,
query=query)
msg_bytes = MlTradeSerializer().encode(msg)
recovered_msg = MlTradeSerializer().decode(msg_bytes)
assert recovered_msg == msg
terms = Description({
"batch_size": 5,
"price": 10,
"seller_tx_fee": 5,
"buyer_tx_fee": 2,
"currency_id": "FET",
"ledger_id": "fetch",
"address": "agent1",
})
msg = MlTradeMessage(performative=MlTradeMessage.Performative.TERMS,
terms=terms)
msg_bytes = MlTradeSerializer().encode(msg)
recovered_msg = MlTradeSerializer().decode(msg_bytes)
assert recovered_msg == msg
tx_digest = "This is the transaction digest."
msg = MlTradeMessage(
performative=MlTradeMessage.Performative.ACCEPT,
terms=terms,
tx_digest=tx_digest,
)
msg_bytes = MlTradeSerializer().encode(msg)
recovered_msg = MlTradeSerializer().decode(msg_bytes)
assert recovered_msg == msg
data = np.zeros((5, 2)), np.zeros((5, 2))
payload = pickle.dumps(data) # nosec
msg = MlTradeMessage(performative=MlTradeMessage.Performative.DATA,
terms=terms,
payload=payload)
msg_bytes = MlTradeSerializer().encode(msg)
recovered_msg = MlTradeSerializer().decode(msg_bytes)
assert recovered_msg == msg
recovered_data = pickle.loads(recovered_msg.payload) # nosec
assert np.array_equal(recovered_data, data)
def test_fipa_incorrect_message(mocked_enforce):
"""Test that we raise an exception when the fipa message is incorrect."""
with mock.patch.object(ml_trade_message_logger, "error") as mock_logger:
MlTradeMessage(
performative=MlTradeMessage.Performative.CFP,
query=Query([Constraint("something", ConstraintType(">", 1))]),
)
mock_logger.assert_any_call("some error")
def test_encoding_unknown_performative():
"""Test that we raise an exception when the performative is unknown during encoding."""
msg = MlTradeMessage(
performative=MlTradeMessage.Performative.CFP,
query=Query([Constraint("something", ConstraintType(">", 1))]),
)
with pytest.raises(ValueError, match="Performative not valid:"):
with mock.patch.object(MlTradeMessage.Performative,
"__eq__",
return_value=False):
MlTradeMessage.serializer.encode(msg)
def _handle_unidentified_dialogue(self,
ml_trade_msg: MlTradeMessage) -> None:
"""
Handle an unidentified dialogue.
:param fipa_msg: the message
"""
self.context.logger.info(
"received invalid ml_trade message={}, unidentified dialogue.".
format(ml_trade_msg))
default_dialogues = cast(DefaultDialogues,
self.context.default_dialogues)
default_msg, _ = default_dialogues.create(
counterparty=ml_trade_msg.sender,
performative=DefaultMessage.Performative.ERROR,
error_code=DefaultMessage.ErrorCode.INVALID_DIALOGUE,
error_msg="Invalid dialogue.",
error_data={"ml_trade_message": ml_trade_msg.encode()},
)
self.context.outbox.put_message(message=default_msg)
def handle(self, message: Message) -> None:
"""
Implement the reaction to a message.
:param message: the message
:return: None
"""
tx_msg_response = cast(TransactionMessage, message)
if (
tx_msg_response.performative
== TransactionMessage.Performative.SUCCESSFUL_SETTLEMENT
):
self.context.logger.info(
"[{}]: transaction was successful.".format(self.context.agent_name)
)
info = tx_msg_response.info
terms = cast(Description, info.get("terms"))
ml_accept = MlTradeMessage(
performative=MlTradeMessage.Performative.ACCEPT,
tx_digest=tx_msg_response.tx_digest,
terms=terms,
)
self.context.outbox.put_message(
to=tx_msg_response.tx_counterparty_addr,
sender=self.context.agent_address,
protocol_id=MlTradeMessage.protocol_id,
message=MlTradeSerializer().encode(ml_accept),
)
self.context.logger.info(
"[{}]: Sending accept to counterparty={} with transaction digest={} and terms={}.".format(
self.context.agent_name,
tx_msg_response.tx_counterparty_addr[-5:],
tx_msg_response.tx_digest,
terms.values,
)
)
else:
self.context.logger.info(
"[{}]: transaction was not successful.".format(self.context.agent_name)
)
def _handle_unidentified_dialogue(self,
ml_trade_msg: MlTradeMessage) -> None:
"""
Handle an unidentified dialogue.
:param fipa_msg: the message
"""
self.context.logger.info(
"[{}]: received invalid ml_trade message={}, unidentified dialogue."
.format(self.context.agent_name, ml_trade_msg))
default_dialogues = cast(DefaultDialogues,
self.context.default_dialogues)
default_msg = DefaultMessage(
performative=DefaultMessage.Performative.ERROR,
dialogue_reference=default_dialogues.
new_self_initiated_dialogue_reference(),
error_code=DefaultMessage.ErrorCode.INVALID_DIALOGUE,
error_msg="Invalid dialogue.",
error_data={"ml_trade_message": ml_trade_msg.encode()},
)
default_msg.counterparty = ml_trade_msg.counterparty
default_dialogues.update(default_msg)
self.context.outbox.put_message(message=default_msg)
def test_ml_wrong_message_creation():
"""Test the creation of a ml message."""
msg = MlTradeMessage(performative=MlTradeMessage.Performative.CFP, query="")
assert not msg._is_consistent()
def _handle_terms(self, ml_trade_msg: MlTradeMessage) -> None:
"""
Handle the terms of the request.
:param ml_trade_msg: the ml trade message
:return: None
"""
terms = ml_trade_msg.terms
self.context.logger.info(
"Received terms message from {}: terms={}".format(
ml_trade_msg.counterparty[-5:], terms.values
)
)
strategy = cast(Strategy, self.context.strategy)
acceptable = strategy.is_acceptable_terms(terms)
affordable = strategy.is_affordable_terms(terms)
if not acceptable and affordable:
self.context.logger.info(
"[{}]: rejecting, terms are not acceptable and/or affordable".format(
self.context.agent_name
)
)
return
if strategy.is_ledger_tx:
# propose the transaction to the decision maker for settlement on the ledger
tx_msg = TransactionMessage(
performative=TransactionMessage.Performative.PROPOSE_FOR_SETTLEMENT,
skill_callback_ids=[PublicId("fetchai", "ml_train", "0.1.0")],
tx_id=strategy.get_next_transition_id(),
tx_sender_addr=self.context.agent_addresses[terms.values["ledger_id"]],
tx_counterparty_addr=terms.values["address"],
tx_amount_by_currency_id={
terms.values["currency_id"]: -terms.values["price"]
},
tx_sender_fee=terms.values["buyer_tx_fee"],
tx_counterparty_fee=terms.values["seller_tx_fee"],
tx_quantities_by_good_id={},
ledger_id=terms.values["ledger_id"],
info={"terms": terms, "counterparty_addr": ml_trade_msg.counterparty},
) # this is used to send the terms later - because the seller is stateless and must know what terms have been accepted
self.context.decision_maker_message_queue.put_nowait(tx_msg)
self.context.logger.info(
"[{}]: proposing the transaction to the decision maker. Waiting for confirmation ...".format(
self.context.agent_name
)
)
else:
# accept directly with a dummy transaction digest, no settlement
ml_accept = MlTradeMessage(
performative=MlTradeMessage.Performative.ACCEPT,
tx_digest=DUMMY_DIGEST,
terms=terms,
)
self.context.outbox.put_message(
to=ml_trade_msg.counterparty,
sender=self.context.agent_address,
protocol_id=MlTradeMessage.protocol_id,
message=MlTradeSerializer().encode(ml_accept),
)
self.context.logger.info(
"[{}]: sending dummy transaction digest ...".format(
self.context.agent_name
)
)
def _handle_terms(self, ml_trade_msg: MlTradeMessage,
ml_trade_dialogue: MlTradeDialogue) -> None:
"""
Handle the terms of the request.
:param ml_trade_msg: the ml trade message
:param ml_trade_dialogue: the dialogue object
:return: None
"""
terms = ml_trade_msg.terms
self.context.logger.info(
"received terms message from {}: terms={}".format(
ml_trade_msg.counterparty[-5:], terms.values))
strategy = cast(Strategy, self.context.strategy)
acceptable = strategy.is_acceptable_terms(terms)
affordable = strategy.is_affordable_terms(terms)
if not acceptable and affordable:
self.context.logger.info(
"rejecting, terms are not acceptable and/or affordable")
return
if strategy.is_ledger_tx:
# construct a tx for settlement on the ledger
ledger_api_dialogues = cast(LedgerApiDialogues,
self.context.ledger_api_dialogues)
ledger_api_msg = LedgerApiMessage(
performative=LedgerApiMessage.Performative.GET_RAW_TRANSACTION,
dialogue_reference=ledger_api_dialogues.
new_self_initiated_dialogue_reference(),
terms=Terms(
ledger_id=terms.values["ledger_id"],
sender_address=self.context.agent_addresses[
terms.values["ledger_id"]],
counterparty_address=terms.values["address"],
amount_by_currency_id={
terms.values["currency_id"]: -terms.values["price"]
},
is_sender_payable_tx_fee=True,
quantities_by_good_id={"ml_training_data": 1},
nonce=uuid.uuid4().hex,
fee_by_currency_id={terms.values["currency_id"]: 1},
),
)
ledger_api_msg.counterparty = LEDGER_API_ADDRESS
ledger_api_dialogue = cast(
Optional[LedgerApiDialogue],
ledger_api_dialogues.update(ledger_api_msg))
assert (ledger_api_dialogue
is not None), "Error when creating ledger api dialogue."
ledger_api_dialogue.associated_ml_trade_dialogue = ml_trade_dialogue
self.context.outbox.put_message(message=ledger_api_msg)
self.context.logger.info(
"requesting transfer transaction from ledger api...")
else:
# accept directly with a dummy transaction digest, no settlement
ml_accept = MlTradeMessage(
performative=MlTradeMessage.Performative.ACCEPT,
dialogue_reference=ml_trade_dialogue.dialogue_label.
dialogue_reference,
message_id=ml_trade_msg.message_id + 1,
target=ml_trade_msg.message_id,
tx_digest=DUMMY_DIGEST,
terms=terms,
)
ml_accept.counterparty = ml_trade_msg.counterparty
ml_trade_dialogue.update(ml_accept)
self.context.outbox.put_message(message=ml_accept)
self.context.logger.info("sending dummy transaction digest ...")