async def record_cancel(contract, event_name, event):
order = event["args"]
order_maker = order["user"]
signature = make_order_hash(order)
date = datetime.fromtimestamp(block_timestamp(App().web3, event["blockNumber"]), tz=None)
if "r" in order and order["r"] is not None:
source = OrderSource.OFFCHAIN
else:
source = OrderSource.ONCHAIN
upsert_args = (
source.name,
Web3.toBytes(hexstr=signature),
Web3.toBytes(hexstr=order["tokenGive"]),
order["amountGive"],
Web3.toBytes(hexstr=order["tokenGet"]),
order["amountGet"],
order["expires"],
order["nonce"],
Web3.toBytes(hexstr=order["user"]),
OrderState.CANCELED.name,
date,
order["amountGet"], # Contract updates orderFills to amountGet when trade is cancelled
date,
0 # Cancelled = 0 volume available
)
async with App().db.acquire_connection() as connection:
upsert_retval = await connection.execute(UPSERT_CANCELED_ORDER_STMT, *upsert_args)
_, _, did_upsert = parse_insert_status(upsert_retval)
if did_upsert:
logger.debug("recorded order cancel signature=%s", signature)
return bool(did_upsert)
async def process_order(contract, event_name, event):
"""
On Order event, record the order, then schedule a job to update the newly inserted order.
"""
order = event["args"]
signature = make_order_hash(order)
logger.debug("received order sig=%s", signature)
did_insert = await record_order(order, event["blockNumber"])
if did_insert:
logger.info("recorded order sig=%s", signature)
update_order_by_signature(signature)
else:
logger.debug("duplicate order sig=%s", signature)