Форум

use Bitrix\Main;
use Yandex\Market;

$eventManager = Main\EventManager::getInstance();

$eventManager->addEventHandler('yandex.market', 'onExportOfferWriteData', function(Main\Event $event) {

   /** @var $tagResultList Market\Result\XmlNode[] */
   /** @var $elementList array */
   /** @var $context array */
   /** @var $parentList array */
   /** @var $tagElement \SimpleXMLElement */
   $tagResultList = $event->getParameter('TAG_RESULT_LIST');
   $elementList = $event->getParameter('ELEMENT_LIST');
   $context = $event->getParameter('CONTEXT');
   $parentList = $event->getParameter('PARENT_LIST');

   foreach ($tagResultList as $elementId => $tagResult)
   {
      if ($tagResult->isSuccess())
      {
         $tagNode = $tagResult->getXmlElement();
         $element = $elementList[$elementId];
         $parent = null;

         $tagNode->addChild('setup_id', $context['SETUP_ID']);
         $tagNode->addChild('offer_id', $element['ID']);

         if (isset($element['PARENT_ID']))
         {
            $parent = $parentList[$element['PARENT_ID']];

            $tagNode->addChild('offer_id', $parent['ID']);
         }

         $tagNode->addAttribute('custom', 'Y');

         $tagResult->invalidateXmlContents();
      }
   }

});