types of chest
Obsidian Chest
Copper Chest
Crystal Chests
Diamond Chest
Gold Chest
Silver Chest
and Steel Chest
This chests are protected and have a "members" thing like the protection blocks
Here are some more images of the chests
Dowload link: https://github.com/ManElevation/iron_chest now its craft able
Github code: https://github.com/ManElevation/iron_chest/blob/master/iron_chests/diamond.lua
and here is a mod created by DonBatman (my doors), this mod includes copper, steel, gold, diamond and mese doors: https://github.com/minetest-mods/mydoors/tree/master/my_default_doors