function verifyParams() public auth {
        require(step == 4);

        require(tub.cap() == 0);
        require(tub.mat() == 1500000000000000000000000000);
        require(tub.axe() == 1130000000000000000000000000);
        require(tub.fee() == 1000000000158153903837946257);
        require(tub.tax() == 1000000000000000000000000000);
        require(tub.gap() == 1000000000000000000);

        require(tap.gap() == 970000000000000000);

        require(vox.par() == 1000000000000000000000000000);
        require(vox.how() == 0);

        step += 1;
    }