ActionUuidHandler.php

<?php
 
namespace Bitrix\Im\V2\Controller\Filter;
 
use Bitrix\Im\V2\ActionUuid;
use Bitrix\Main\Engine\ActionFilter\Base;
use Bitrix\Main\Event;
 
class ActionUuidHandler extends Base
{
    public function onBeforeAction(Event $event)
    {
        $actionUuid = $this->getAction()->getBinder()->getSourcesParametersToMap()[0]['actionUuid'] ?? null;
 
        if (isset($actionUuid))
        {
            ActionUuid::getInstance()->setValue($actionUuid);
        }
 
        return null;
    }
}