def accept_offer(txn_key, batch_key, identifier, offerer, receiver, count):
"""Create an AcceptOffer txn and wrap it in a Batch and list.
Args:
txn_key (sawtooth_signing.Signer): The Txn signer key pair.
batch_key (sawtooth_signing.Signer): The Batch signer key pair.
identifier (str): The identifier of the Offer.
offerer (OfferParticipant): The participant who made the offer.
receiver (OfferParticipant): The participant who is accepting
the offer.
count (int): The number of units of exchange.
Returns:
tuple: List of Batch, signature tuple
"""
inputs = [
addresser.make_asset_address(receiver.target),
addresser.make_asset_address(offerer.source),
addresser.make_resource_address(receiver.target_resource),
addresser.make_resource_address(offerer.source_resource),
addresser.make_offer_history_address(offer_id=identifier),
addresser.make_offer_account_address(
offer_id=identifier, account=txn_key.get_public_key().as_hex()),
addresser.make_offer_address(identifier)
]
outputs = [
addresser.make_asset_address(receiver.target),
addresser.make_asset_address(offerer.source),
addresser.make_offer_history_address(offer_id=identifier),
addresser.make_offer_account_address(
offer_id=identifier, account=txn_key.get_public_key().as_hex())
]
if receiver.source is not None:
inputs.append(addresser.make_asset_address(receiver.source))
inputs.append(addresser.make_resource_address(
receiver.source_resource))
outputs.append(addresser.make_asset_address(receiver.source))
if offerer.target is not None:
inputs.append(addresser.make_asset_address(offerer.target))
inputs.append(addresser.make_resource_address(offerer.target_resource))
outputs.append(addresser.make_asset_address(offerer.target))
accept_txn = payload_pb2.AcceptOffer(id=identifier,
source=receiver.source,
target=receiver.target,
count=count)
payload = payload_pb2.TransactionPayload(
payload_type=payload_pb2.TransactionPayload.ACCEPT_OFFER,
accept_offer=accept_txn)
return make_header_and_batch(payload=payload,
inputs=inputs,
outputs=outputs,
txn_key=txn_key,
batch_key=batch_key)
def save_offer_receipt(self, offer_id):
address = addresser.make_offer_history_address(offer_id=offer_id)
container = _get_history_container(self._state_entries, address)
offer_history = container.entries.add()
offer_history.offer_id = offer_id
state_entries_send = {}
state_entries_send[address] = container.SerializeToString()
return self._context.set_state(state_entries_send, self._timeout)
def save_offer_receipt(self, offer_id):
address = addresser.make_offer_history_address(offer_id=offer_id)
container = _get_history_container(self._state_entries, address)
offer_history = container.entries.add()
offer_history.offer_id = offer_id
state_entries_send = {}
state_entries_send[address] = container.SerializeToString()
return self._context.set_state(
state_entries_send,
self._timeout)
def offer_has_receipt(self, offer_id):
address = addresser.make_offer_history_address(offer_id=offer_id)
self._state_entries.extend(
self._context.get_state(addresses=[address],
timeout=self._timeout))
container = _get_history_container(self._state_entries, address)
try:
_get_history_by_offer_id(container, offer_id=offer_id)
return True
except KeyError:
return False
def offer_has_receipt(self, offer_id):
address = addresser.make_offer_history_address(
offer_id=offer_id)
self._state_entries.extend(self._context.get_state(
addresses=[address],
timeout=self._timeout))
container = _get_history_container(self._state_entries, address)
try:
_get_history_by_offer_id(
container,
offer_id=offer_id)
return True
except KeyError:
return False
def accept_offer(txn_key,
batch_key,
identifier,
offerer,
receiver,
count):
"""Create an AcceptOffer txn and wrap it in a Batch and list.
Args:
txn_key (sawtooth_signing.Signer): The Txn signer key pair.
batch_key (sawtooth_signing.Signer): The Batch signer key pair.
identifier (str): The identifier of the Offer.
offerer (OfferParticipant): The participant who made the offer.
receiver (OfferParticipant): The participant who is accepting
the offer.
count (int): The number of units of exchange.
Returns:
tuple: List of Batch, signature tuple
"""
inputs = [addresser.make_holding_address(receiver.target),
addresser.make_holding_address(offerer.source),
addresser.make_asset_address(receiver.target_asset),
addresser.make_asset_address(offerer.source_asset),
addresser.make_offer_history_address(offer_id=identifier),
addresser.make_offer_account_address(
offer_id=identifier,
account=txn_key.get_public_key().as_hex()),
addresser.make_offer_address(identifier)]
outputs = [addresser.make_holding_address(receiver.target),
addresser.make_holding_address(offerer.source),
addresser.make_offer_history_address(offer_id=identifier),
addresser.make_offer_account_address(
offer_id=identifier,
account=txn_key.get_public_key().as_hex())]
if receiver.source is not None:
inputs.append(addresser.make_holding_address(receiver.source))
inputs.append(addresser.make_asset_address(receiver.source_asset))
outputs.append(addresser.make_holding_address(receiver.source))
if offerer.target is not None:
inputs.append(addresser.make_holding_address(offerer.target))
inputs.append(addresser.make_asset_address(offerer.target_asset))
outputs.append(addresser.make_holding_address(offerer.target))
accept_txn = payload_pb2.AcceptOffer(
id=identifier,
source=receiver.source,
target=receiver.target,
count=count)
payload = payload_pb2.TransactionPayload(
payload_type=payload_pb2.TransactionPayload.ACCEPT_OFFER,
accept_offer=accept_txn)
return make_header_and_batch(
payload=payload,
inputs=inputs,
outputs=outputs,
txn_key=txn_key,
batch_key=batch_key)