    function set_participant(
        address db,
        address _a,
        uint256 _ta,
        uint256 _arbits,
        uint256 _prta,
        bool _v3,
        uint8 _nou
    ) internal {
        database(db).set_participant(_a, _ta, _arbits, _prta, _v3, _nou);
        emit e_set_participant(_a, _ta, _arbits, _prta, _v3, _nou);
    }