InventoryTransactionEvent

PHP:

public function Transaction(InventoryTransactionEvent $event){

$event->setCancelled(true):

}

Hello I want to cancel the event if the Player is gamemode 1. Can Someone help me?

 

PHP:

public function onInventoryTransaction(InventoryTransactionEvent $event){
  if ($event->getTransaction()->getSource()->getGamemode() === Player::CREATIVE) {
    $event->setCancelled(true);
  }
}