Keys and Locked Doors/Chests

Keys could be crafted with two iron ingots. They would work similarly to lodestone compasses, where you use the key on any door or chest to pair that key to it. if the key is ever destroyed, the door/chest would revert back to normal and can be opened without a key. if a key is assigned to a door, the door could not be paired to another key until the first is destroyed, however there could be a way to duplicate keys using the original. Keys could be named using the anvil.