I would like to know if it is possible to lock slots in an Enderchest (like in Hypixel Skyblock at the Minion Storages), so that only 3 or 5 are available. I play in 1.12.2
Do you play online or offline?
In the former case you need a plugin, e.g.
https://dev.bukkit.org/...enderchest
And in offline mode you need a mod. I don't know any myself, but I just found this on the Internet, maybe it helps:
https://www.curseforge.com/...ible-chest
However, Forge is required for this.