technic/technic_chests/gold_chest.lua

local material_list
if minetest.get_modpath("moreores") then
	material_list = { "silver" }
else
	-- Make the gold chest obtainable for mere mortals (the silver chest is not obtainable)
	material_list = { "copper", "silver" }
end

for _, material in ipairs(material_list) do
	minetest.register_craft({
		output = "technic:gold_chest",
		recipe = {
			{ "default:gold_ingot", "default:gold_ingot", "default:gold_ingot" },
			{ "default:gold_ingot", "technic:"..material.."_chest", "default:gold_ingot" },
			{ "default:gold_ingot", "default:gold_ingot", "default:gold_ingot" },
		}
	})

	minetest.register_craft({
		output = "technic:gold_locked_chest",
		recipe = {
			{ "default:gold_ingot", "default:gold_ingot", "default:gold_ingot" },
			{ "default:gold_ingot", "technic:"..material.."_locked_chest", "default:gold_ingot" },
			{ "default:gold_ingot", "default:gold_ingot", "default:gold_ingot" },
		}
	})
end

minetest.register_craft({
	output = "technic:gold_locked_chest",
	recipe = {
		{ "default:steel_ingot" },
		{ "technic:gold_chest" },
	}
})

technic.chests:register("Gold", {
	width = 15,
	height = 6,
	sort = true,
	autosort = true,
	infotext = true,
	color = true,
	locked = false,
})

technic.chests:register("Gold", {
	width = 15,
	height = 6,
	sort = true,
	autosort = true,
	infotext = true,
	color = true,
	locked = true,
})