LukePOLO\LaraCart\LaraCartServiceProvider::register PHP Method

    public function register()
    {
        $this->app->singleton(LaraCart::SERVICE, function ($app) {
            return new LaraCart($app['session'], $app['events'], $app['auth']);
        });
        $this->app->bind(LaraCart::HASH, function ($app, $data) {
            return md5(json_encode($data));
        });
        $this->app->bind(LaraCart::RANHASH, function () {
            return str_random(40);
        });
    }