Currently, item movements can only be globally disabled or enabled inside the config. In some situations, in which the chest can be explicitly guarded by some external region protection, it might be useful to allow the use of hoppers with shopkeeper chests. But enabling it globally would make all shop chests on the server vulnerable to exploits by other players.

Idea: Make this a per-shopkeeper setting, or a per-chest setting should we support multiple chests per shopkeeper at some point.

how about adding the ability to define an input (items to sell) and an output (items received as payment) chest for a shop so you could pull from the output chest and push into the input chest so the exploit "interface" is smaller