Kernel.php

<?php

namespace App\Http;

use Illuminate\Foundation\Http\Kernel as HttpKernel;
use Illuminate\Support\Facades\DB;

/**
 * Class Kernel
 * @package App\Http
 */
class Kernel extends HttpKernel
{
    /* ... */

    /**
     * Bootstrap the application for HTTP requests.
     *
     * @return void
     */
    public function bootstrap()
    {
        parent::bootstrap();

        DB::beginTransaction();
    }

    /**
     * Call the terminate method on any terminable middleware.
     *
     * @param  \Illuminate\Http\Request $request
     * @param  \Illuminate\Http\Response $response
     * @return void
     */
    public function terminate($request, $response)
    {
        parent::terminate($request, $response);

        if (!DB::transactionLevel()) {
            return;
        }
        if ($response->isClientError() || $response->isServerError()) {
            DB::rollBack();
            return;
        }
        DB::commit();
    }
}