site.php

<?php
namespace Bitrix\Sale\Services\PaySystem\Restrictions;
 
use Bitrix\Main\Localization\Loc;
use Bitrix\Sale;
use Bitrix\Sale\Services\Base;
 
Loc::loadMessages(__FILE__);
 
class Site extends Base\SiteRestriction
{
    protected static function getOrder(Sale\Internals\Entity $entity)
    {
        if (!($entity instanceof Sale\Payment))
        {
            return null;
        }
 
        $collection = $entity->getCollection();
 
        return $collection->getOrder();
    }
}