def _unpack_transaction(transaction):
'''Return the transaction signing key, the SCPayload timestamp, the
appropriate SCPayload action attribute, and the appropriate
handler function (with the latter two determined by the constant
TYPE_TO_ACTION_HANDLER table.
'''
header = TransactionHeader()
header.ParseFromString(transaction.header)
signer = header.signer_pubkey
payload = SCPayload()
payload.ParseFromString(transaction.payload)
action = payload.action
timestamp = payload.timestamp
try:
attribute, handler = TYPE_TO_ACTION_HANDLER[action]
except KeyError:
raise Exception('Specified action is invalid')
payload = getattr(payload, attribute)
return signer, timestamp, payload, handler
def make_empty_payload(self, public_key):
address = addressing.make_agent_address(public_key)
return self._create_transaction(
payload=SCPayload().SerializeToString(),
inputs=[address],
outputs=[address])
def _make_sc_payload(**kwargs):
return SCPayload(timestamp=round(time.time()),
**kwargs).SerializeToString()