function liabilityFinalized(
        uint256 _gas
    )
        external
        gasPriceEstimated
        returns (bool)
    {
        require(gasUtilizing[msg.sender] > 0);

        uint256 gas = _gas - gasleft();
        require(_gas > gas);

        totalGasUtilizing        += gas;
        gasUtilizing[msg.sender] += gas;

        require(xrt.mint(tx.origin, wnFromGas(gasUtilizing[msg.sender])));
        return true;
    }