function _setFeeStructure(uint _absMinFee, uint _feePercent, uint _absMaxFee) internal returns (bool) {
        if(_absMinFee < 0 || _feePercent < 0 || _feePercent > 10000 || _absMaxFee < 0 || _absMaxFee < _absMinFee) {
            Error(1, tx.origin, msg.sender);
            return false;
        }
        absMinFee = _absMinFee;
        feePercent = _feePercent;
        absMaxFee = _absMaxFee;
        return true;
    }