async def record_trade(contract, event_name, event):
block_number = coerce_to_int(event["blockNumber"])
log_index = coerce_to_int(event["logIndex"])
date = datetime.fromtimestamp(block_timestamp(App().web3,
event["blockNumber"]),
tz=None)
insert_args = (block_number, Web3.toBytes(hexstr=event["transactionHash"]),
log_index, Web3.toBytes(hexstr=event["args"]["tokenGive"]),
event["args"]["amountGive"],
Web3.toBytes(hexstr=event["args"]["tokenGet"]),
event["args"]["amountGet"],
Web3.toBytes(hexstr=event["args"]["give"]),
Web3.toBytes(hexstr=event["args"]["get"]), date)
async with App().db.acquire_connection() as connection:
insert_retval = await connection.execute(INSERT_TRADE_STMT,
*insert_args)
_, _, did_insert = parse_insert_status(insert_retval)
if did_insert:
logger.debug("recorded trade txid=%s, logidx=%i",
event["transactionHash"], log_index)
return bool(did_insert)
async def process_trade(contract, event_name, event):
logger.debug("received trade txid=%s", event["transactionHash"])
did_insert = await record_trade(contract, event_name, event)
if did_insert:
logger.info("recorded trade txid=%s, logidx=%i",
event["transactionHash"], coerce_to_int(event["logIndex"]))
##
# Dispatch a background job to update potentially affected orders
#
# Potentially affected orders include orders by the maker and the taker,
# on both tokenGive and tokenGet sides of the trade.
block_number = coerce_to_int(event["blockNumber"])
trade_parties = set([
# Order maker side is recorded in `get`
event["args"]["get"],
# Taker side is recorded in `give`
event["args"]["give"],
])
traded_tokens = set([
event["args"]["tokenGet"],
event["args"]["tokenGive"],
])
for trade_party in trade_parties:
update_orders_by_maker_and_tokens(trade_party, traded_tokens,
block_number)
else:
logger.debug("duplicate trade txid=%s", event["transactionHash"])
async def record_deposit(contract, event_name, event):
did_insert = await record_transfer("DEPOSIT", event)
if did_insert:
enqueue_order_update_for_transfer(event)
logger.info("recorded deposit txid=%s, logidx=%i",
event["transactionHash"], coerce_to_int(event["logIndex"]))
return did_insert
async def record_withdraw(contract, event_name, event):
did_insert = await record_transfer("WITHDRAW", event)
if did_insert:
enqueue_order_update_for_transfer(event)
logger.info("recorded withdraw txid=%s, logidx=%i",
event["transactionHash"], coerce_to_int(event["logIndex"]))
return did_insert
async def record_transfer(transfer_direction, event):
block_number = coerce_to_int(event["blockNumber"])
log_index = coerce_to_int(event["logIndex"])
date = datetime.fromtimestamp(block_timestamp(App().web3, block_number),
tz=None)
insert_args = (block_number, Web3.toBytes(hexstr=event["transactionHash"]),
log_index, transfer_direction,
Web3.toBytes(hexstr=event["args"]["token"]),
Web3.toBytes(hexstr=event["args"]["user"]),
event["args"]["amount"], event["args"]["balance"], date)
async with App().db.acquire_connection() as connection:
insert_retval = await connection.execute(INSERT_TRANSFER_STMT,
*insert_args)
_, _, did_insert = parse_insert_status(insert_retval)
return bool(did_insert)
def enqueue_order_update_for_transfer(event):
"""
Enqueues a task to update orders' fill / available volume when a
Deposit/Withdraw event occurs.
"""
user_addr = event["args"]["user"]
token_addr = event["args"]["token"]
block_number = coerce_to_int(event["blockNumber"])
update_orders_by_maker_and_token(user_addr, token_addr, block_number)
async def process_trade(contract, event_name, event):
logger.debug("received trade txid=%s", event["transactionHash"])
did_insert = await record_trade(contract, event_name, event)
if did_insert:
logger.info("recorded trade txid=%s, logidx=%i",
event["transactionHash"], coerce_to_int(event["logIndex"]))
##
# Dispatch a background job to update potentially affected orders
block_number = coerce_to_int(event["blockNumber"])
# Order maker side is recorded in `get`
order_maker = event["args"]["get"]
if event["args"]["tokenGive"] != ZERO_ADDR:
coin_addr = event["args"]["tokenGive"]
else:
coin_addr = event["args"]["tokenGet"]
update_orders_by_maker_and_token(order_maker, coin_addr, block_number)
else:
logger.debug("duplicate trade txid=%s", event["transactionHash"])
