/**
* purchase key calculated from the cartitem
* @param Event $event
* @param Order $order
* @param CartItem $cartItem
*/
public function onCartPurchaseKey(Event $event, Order $order, CartItem $cartItem)
{
/** @var File $file */
$file = $cartItem->loadItemModel();
$orderValid = $this->validateOrder($order, $cartItem, $file);
$event->addParameters(['invalidPurchaseKey' => !empty($event['allowPurchaseKey']) ? $event['allowPurchaseKey'] : !$orderValid], true);
}
