Laravel Database transaction middleware

DbTransaction.php

<?php

namespace Core\Http\Middleware;

use Closure;
use Illuminate\Contracts\Auth\Guard;
use Illuminate\Contracts\Validation\UnauthorizedException;
use Illuminate\Support\Facades\DB;
use Symfony\Component\HttpFoundation\Response;

class DatabaseTransactions
{
    /**
     * The Guard implementation.
     *
     * @var Guard
     */
    protected $auth;

  
    public function handle($request, Closure $next)
    {
        return DB::transaction(function () use ($request, $next) {
            return $next($request);
        });
    }
}