@eventlog
def Cancel(self, _market: String, _order: int): pass
@eventlog
def Trade(self, _market: String, _price: int, _size: int, _side: int, _taker: int, _maker: int, _taker_user: Address, _maker_user: Address): pass
@eventlog
def Order(self, _market: String, _price: int, _size: int, _side: int, _user: Address): pass