        if (
            isActive(id) &&
            offers[id].pay_amt < _dust[address(offers[id].pay_gem)]
        ) {
            dustId = id; //enable current msg.sender to call cancel(id)
            cancel(id);
        }
        _offer.owner == address(0) && msg.sender == _offer.recipient
            ? require(_offer.pay_gem.transfer(_offer.recipient, _offer.pay_amt))
            : require(_offer.pay_gem.transfer(_offer.owner, _offer.pay_amt));
