middleware? perhaps.. need to know a bit more on what you are trying to do

I would like to format my response with a transformer (like fractal), so, instead of putting the logic in each controller action, I thought of create a response listener to "catch" each response and handle it before return it.

I have tried to register this service provider:

use Illuminate\Support\Facades\Event;
use Illuminate\Support\ServiceProvider;

class ResponseListenerServiceProvider extends ServiceProvider
{

    public function register()
    {
        Event::listen(
            'laravel.done', function() {

            die('Goodbye');
        });
    }
}

as I read that "laravel.done" is the right event but doesn't seem to be working