composer require artme/laravel-paysera
paysera.php to config
app provider
Artme\Paysera\PayseraServiceProvider::class
cart.php to cofig

SINGLE order
web route
Route::post('orderStore/{any}/{any3}', 'Frontend\ProductController@orderStore');

frontend view
@if(\Session::has('orderMessage'))
    <div class="alert alert-success">Ačiū.</div>
    @elseif(\Session::has('orderError'))
        <div class="alert alert-danger">Klaida.</div>
@else
{!! Form::open(array('action' => ['Frontend\OrderController@orderStore', $pageItem->id, 1], 'files' => true)) !!}
    @include('frontend/order/form')
    {!! Form::submit(__('Submit'), ['class'=>'btn btn-primary btn-pink btn-lg']) !!}
    {!! Form::close() !!}
@endif