def _new_payment_command_transaction(command: offchain.PaymentCommand,
status: TransactionStatus) -> Transaction:
payment = command.payment
sender_address, source_subaddress = _account_address_and_subaddress(
payment.sender.address)
destination_address, destination_subaddress = _account_address_and_subaddress(
payment.receiver.address)
source_id = get_account_id_from_subaddr(source_subaddress)
destination_id = get_account_id_from_subaddr(destination_subaddress)
return Transaction(
type=TransactionType.OFFCHAIN,
status=status,
amount=payment.action.amount,
currency=payment.action.currency,
created_timestamp=datetime.utcnow(),
source_id=source_id,
source_address=sender_address,
source_subaddress=source_subaddress,
destination_id=destination_id,
destination_address=destination_address,
destination_subaddress=destination_subaddress,
reference_id=command.reference_id(),
command_json=offchain.to_json(command),
)
def _create_payment_command(self,
account_id: str,
cmd: offchain.PaymentCommand,
validate: bool = False) -> None:
self.app.store.create(
PaymentCommand,
before_create=lambda _: cmd.validate(None) if validate else None,
account_id=account_id,
is_sender=cmd.is_sender(),
reference_id=cmd.reference_id(),
is_inbound=cmd.is_inbound(),
cid=cmd.id(),
payment_object=asdict(cmd.payment),
)
def _lock_and_save_inbound_command(
command: offchain.PaymentCommand) -> Transaction:
def validate_and_save(txn: Optional[Transaction]) -> Transaction:
if txn:
prior = _txn_payment_command(txn)
if command == prior:
return
command.validate(prior)
txn.command_json = offchain.to_json(command)
txn.status = _command_transaction_status(
command, TransactionStatus.OFF_CHAIN_INBOUND)
else:
txn = _new_payment_command_transaction(
command, TransactionStatus.OFF_CHAIN_INBOUND)
return txn
return lock_for_update(command.reference_id(), validate_and_save)
def _enqueue_follow_up_action(self,
command: offchain.PaymentCommand) -> None:
if command.follow_up_action():
self.task_queue.append(lambda app: app._offchain_business_action(
command.reference_id()))