Remove one item on interact

Hi,
How can I remove the item on PlayerInteractEvent, so you can only use it one time?
But only one item, if the player has two, he should have one after this.

Which item?

Look at the sourcecode of economySell.

PHP:

/** @type Player $player */
$inv = $player->getInventory();
$item = $inv->getItemInHand();
$item->count--;
$inv->setItemInHand($item);

I needed the same thing like you, I just did: $item = new Item(id, damage, amount); then $player->getInventory()->remove($item); and then right after it $player->getInventory()->addItem($item)