extends RefCounted

## Structure of item and amount of it. Basic object that more complex exchange

class_name Stack

func _init(item: Item = null, amount: int = 0) -> void:
	held_item = item
	self.amount = amount

## Item in stack
@export_storage var held_item : Item

## Amount of items in stack
@export_storage var amount : int

func invalidate() -> void:
	held_item = null
	amount = 0

func is_valid() -> bool:
	return held_item != null or amount > 0