How to catch the completion of unloading the directory from 1s to the site?

Question

1C-Bitrix

I unload a user directory from 1s and want to track the completion of this event.
Previously, to track the unloading of goods, I used the OnSuccessCatalogImport1C event in the following way:

AddEventHandler("catalog", "OnSuccessCatalogImport1C", "DSOnSuccessCatalogImport1C");
function DSOnSuccessCatalogImport1C(){
        AddMessage2Log("WORK!");
}

But when exchanging a directory (it is written in highloadblock), this construction does not work. I've tried changing the id of the module that will fire the event from catalog to highloadblock , but it still doesn't work. I understand this event only works with the catalog and products.
Can you please tell me how to track the end of the exchange in highloadblock?

Answer 1

Understood. Source .

use Bitrix\Main;
use Bitrix\Main\Entity;
 
$eventManager = Main\EventManager::getInstance();
$eventManager->addEventHandler("", "TransactionOnBeforeUpdate", "TransactionBeforeUpdate");
 
function TransactionBeforeUpdate(Entity\Event $event)
{ 
    echo "<pre>";
    $arParameters = $event->getParameters();
    var_dump($arParameters);
    return 1;
}

Where Transaction is the name of the IB