def decode_chaincode_action_payload(payload_bytes):
"""Decodes chaincode action payload from ChaincodeAction
:param payload_bytes: Bytes buffer of the payload
:type payload_bytes: str
:return: deserialized payload information and action.
"""
payload = {}
proto_chaincode_action_payload = transaction_pb2.ChaincodeActionPayload()
proto_chaincode_action_payload.ParseFromString(payload_bytes)
payload['chaincode_proposal_payload'] = \
decode_chaincode_proposal_payload(
proto_chaincode_action_payload.chaincode_proposal_payload)
payload['action'] = \
decode_chaincode_endorsed_action(proto_chaincode_action_payload.action)
return payload
def create_tx_payload(endorsements, tran_req):
cc_action_payload = transaction_pb2.ChaincodeActionPayload()
response, _ = tran_req.responses[0]
cc_action_payload.action.proposal_response_payload = \
response.payload
cc_action_payload.action.endorsements.extend(endorsements)
cc_action_payload.chaincode_proposal_payload = tran_req.proposal.payload
tran = transaction_pb2.Transaction()
cc_tran_action = tran.actions.add()
cc_tran_action.header = tran_req.header.signature_header
cc_tran_action.payload = cc_action_payload.SerializeToString()
tran_payload = common_pb2.Payload()
tran_payload.header.channel_header = tran_req.header.channel_header
tran_payload.header.signature_header = tran_req.header.signature_header
tran_payload.data = tran.SerializeToString()
tran_payload_bytes = tran_payload.SerializeToString()
return tran_payload_bytes
def send_transaction(orderers, tran_req, signing_identity, scheduler=None):
"""Send a transaction to the chain's orderer service (one or more
orderer endpoints) for consensus and committing to the ledger.
This call is asynchronous and the successful transaction commit is
notified via a BLOCK or CHAINCODE event. This method must provide a
mechanism for applications to attach event listeners to handle
'transaction submitted', 'transaction complete' and 'error' events.
Args:
scheduler: scheduler
signing_identity: signing identity
orderers: orderers
tran_req (TransactionRequest): The transaction object
Returns:
result (EventEmitter): an handle to allow the application to
attach event handlers on 'submitted', 'complete', and 'error'.
"""
if not tran_req:
return rx.Observable.just(ValueError(
"Missing input request object on the transaction request"
))
if not tran_req.responses or len(tran_req.responses) < 1:
return rx.Observable.just(ValueError(
"Missing 'proposalResponses' parameter in transaction request"
))
if not tran_req.proposal:
return rx.Observable.just(ValueError(
"Missing 'proposalResponses' parameter in transaction request"
))
if len(orderers) < 1:
return rx.Observable.just(ValueError(
"Missing orderer objects on this chain"
))
endorsements = map(lambda res: res[0].endorsement, tran_req.responses)
cc_action_payload = transaction_pb2.ChaincodeActionPayload()
response, _ = tran_req.responses[0]
cc_action_payload.action.proposal_response_payload = \
response.payload
cc_action_payload.action.endorsements.extend(endorsements)
cc_action_payload.chaincode_proposal_payload = tran_req.proposal.payload
tran = transaction_pb2.Transaction()
cc_tran_action = tran.actions.add()
cc_tran_action.header = tran_req.header.signature_header
cc_tran_action.payload = cc_action_payload.SerializeToString()
tran_payload = common_pb2.Payload()
tran_payload.header.channel_header = tran_req.header.channel_header
tran_payload.header.signature_header = tran_req.header.signature_header
tran_payload.data = tran.SerializeToString()
envelope = sign_tran_payload(signing_identity, tran_payload)
if sys.version_info < (3, 0):
orderer = random.choice(orderers.values())
else:
orderer = random.choice(list(orderers.values()))
return orderer.broadcast(envelope, scheduler)