def back_by_price():
keys = bytes(32)
values = bytes(8 + 4)
if eoslib.back(exchange, exchange, table_asks, keys, 1, 1, values) > 0:
ask = Ask()
ask.seller = OrderID(keys[:16])
ask.price = uint128(keys[16:])
result = struct.unpack('QI', values)
ask.quantity = result[0]
ask.expiration = result[1]
return ask
return None
def back_by_price():
keys = bytes(32)
values = bytes(8 + 4)
if eoslib.back(exchange, exchange, table_bids, keys, 1, 1, values) > 0:
bid = Bid()
bid.buyer = OrderID(keys[:16])
bid.price = uint128(keys[16:])
result = struct.unpack('QI', values)
bid.quantity = result[0]
bid.expiration = result[1]
return bid
return None