function setRule(uint16 _role, uint _baseLockPercent, uint _startLockTime, uint _stopLockTime,uint _linearRelease) onlyOwner {
        assert(_startLockTime > block.timestamp);
        assert(_stopLockTime > _startLockTime);
        
        roleRule[_role] = LockRule({
            baseLockPercent: _baseLockPercent,
            startLockTime: _startLockTime,
            stopLockTime: _stopLockTime,
            linearRelease: _linearRelease
        });
    }