'Return network representation of a counter trade'

def to_network(self):

    return (self._recipient_order_id.trader_id, (self._order_id.trader_id, self._message_id.message_number, self._order_id.order_number, self._recipient_order_id.trader_id, self._recipient_order_id.order_number, self._proposal_id, self._price, self._quantity, self._timestamp))
