def next_by_price(self):
keys = struct.pack('16s16s', bytes(16), self.price())
values = struct.pack('QI', self.quantity, self.expiration)
if eoslib.next(exchange, exchange, table_asks, keys, 1, 0, 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 next_by_order_id(self):
keys = struct.pack('16s16s', self.buyer(), bytes(16))
values = struct.pack('QI', self.quantity, self.expiration)
if eoslib.next(exchange, exchange, table_bids, keys, 1, 0, values) > 0:
bid = Ask()
bid.seller = 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