tradebinding.php

См. документацию.

<?php
namespace Bitrix\Sale\Services\PaySystem\Restrictions;
 
use Bitrix\Main\Localization\Loc;
use Bitrix\Sale;
use Bitrix\Sale\Services\Base;
 
Loc::loadMessages(__FILE__);

class TradeBinding extends Base\TradeBindingRestriction
{
    protected static function getOrder(Sale\Internals\Entity $entity)
    {
        if ($entity instanceof Sale\Payment)
        {
            $collection = $entity->getCollection();

            return $collection->getOrder();
        }
        elseif ($entity instanceof Sale\Order)
        {
            return $entity;
        }
 
        return null;
    }
}