Redux Framwork Global Variable in plugin

Question

I am currently developing a plugin which uses filters from redux framework. This plugin will be used by themes that uses Redux Framework to extend the functionality.

Filter i need to use is redux/validate/{opt_name}/defaults. Since it will be used by different themes, i am not able to get {opt_name} variable used by the theme. How can i get opt_name variable which will work for redux framework based themes ?

    if (class_exists( 'Redux' ) ) { 
        global $opt_name;
        add_filter('redux/validate/'.$opt_name.'/defaults', 
        'my_function_here' ); 
    }