Смена статуса заказа при отмене заказа

use \Bitrix\Main;

   $event->addResult(
      new Main\EventResult(
         Main\EventResult::SUCCESS, $order
      )
   );

/** @var \Bitrix\Sale\Order $order */
$order = $params->getParameter("ENTITY");
$order->setField( 'STATUS_ID', <код статуса>);
$order->save();

AddEventHandler("sale", "OnSaleBeforeOrderCanceled", "OnSaleBeforeOrderCanceledHandlers");

function OnSaleBeforeOrderCanceledHandlers(\Bitrix\Main\Event $event){
   $order = $event->getParameter("ENTITY");
   $order->setField("STATUS_ID", "C");
   $order->save();
}

use Bitrix\Main\Event;
use Bitrix\Main\EventManager;
use Bitrix\Sale\Order;

$eventManager = EventManager::getInstance();
$eventManager->addEventHandler( 'sale', 'OnSaleOrderCanceled', static function (Event $event) {
    /** @var Order $order */
    $order = $event->getParameter( 'ENTITY' );
    if ( $order->isCanceled() ) {
        $order->setField('STATUS_ID', 'C');
    }
} );

return new Main\EventResult( Main\EventResult::SUCCESS, null, 'sale');

use Bitrix\Main\Event;
use Bitrix\Main\EventManager;
use Bitrix\Sale\Order;

$eventManager = EventManager::getInstance();
$eventManager->addEventHandler( 'sale', 'OnSaleOrderCanceled', static function (Event $event) {
    /** @var Order $order */
    $order = $event->getParameter( 'ENTITY' );
    $order->setField('STATUS_ID', 'C');
    return new Main\EventResult( Main\EventResult::SUCCESS, null, 'sale');
} );