function doBurn(uint256 _xaurAmount) public onlyOwner returns (bool) {
        uint actualBalance = FreeXaurum();
        uint totalSupply = XaurumInterface(XaurumAddress).totalSupply();
        require(totalSupply >= _xaurAmount);
        require(actualBalance >= _xaurAmount);
        XaurumInterface(XaurumAddress).doMelt(_xaurAmount, 0);
        xaurumBurned += _xaurAmount;
        xaurumDestroyed += _xaurAmount;
        emit BurnDone(_xaurAmount);
    }