technic/technic_chests/gold_chest.lua

local chest_mark_colors = {
    '_black',
    '_blue', 
    '_brown',
    '_cyan',
    '_dark_green',
    '_dark_grey',
    '_green',
    '_grey',
    '_magenta',
    '_orange',
    '_pink',
    '_red',
    '_violet',
    '_white',
    '_yellow',
}

minetest.register_craft({
	output = 'technic:gold_chest 1',
	recipe = {
		{'default:gold_ingot', 'default:gold_ingot',   'default:gold_ingot'},
		{'default:gold_ingot', 'technic:silver_chest', 'default:gold_ingot'},
		{'default:gold_ingot', 'default:gold_ingot',   'default:gold_ingot'},
	}
})

minetest.register_craft({
	output = 'technic:gold_locked_chest 1',
	recipe = {
		{'default:gold_ingot', 'default:gold_ingot',          'default:gold_ingot'},
		{'default:gold_ingot', 'technic:silver_locked_chest', 'default:gold_ingot'},
		{'default:gold_ingot', 'default:gold_ingot',          'default:gold_ingot'},
	}
})

minetest.register_craft({
	output = 'technic:gold_locked_chest 1',
	recipe = {
		{'default:steel_ingot'},
		{'technic:gold_chest'},
	}
})

minetest.register_craftitem(":technic:gold_chest", {
	description = "Gold Chest",
	stack_max = 99,
})
minetest.register_craftitem(":technic:gold_locked_chest", {
	description = "Gold Locked Chest",
	stack_max = 99,
})

gold_chest_formspec	=	"invsize[12,9;]"..
						"list[current_name;main;0,0;12,4;]"..
						"list[current_player;main;0,5;8,4;]"

gold_chest_inv_size = 12*4

minetest.register_node(":technic:gold_chest", {
	description = "Gold Chest",
	tiles = {"technic_gold_chest_top.png", "technic_gold_chest_top.png", "technic_gold_chest_side.png",
		"technic_gold_chest_side.png", "technic_gold_chest_side.png", "technic_gold_chest_front.png"},
	paramtype2 = "facedir",
	groups = chest_groups1,
	tube = tubes_properties,
	legacy_facedir_simple = true,
	sounds = default.node_sound_wood_defaults(),

	on_construct = function(pos)
		local meta = minetest.env:get_meta(pos)
		meta:set_string("formspec",gold_chest_formspec)
		meta:set_string("infotext", "Gold Chest")
		local inv = meta:get_inventory()
		inv:set_size("main", gold_chest_inv_size)
	end,

	can_dig = chest_can_dig,

	on_punch = function (pos, node, puncher)
	chest_punched (pos,node,puncher);
	end,

	on_receive_fields = function(pos, formname, fields, sender)
	local meta = minetest.env:get_meta(pos);
	fields.text = fields.text or ""
	meta:set_string("text", fields.text)
	meta:set_string("infotext", '"'..fields.text..'"')
	meta:set_string("formspec",gold_chest_formspec)
	end,

	on_metadata_inventory_move = def_on_metadata_inventory_move,
	on_metadata_inventory_put = def_on_metadata_inventory_put,
	on_metadata_inventory_take = def_on_metadata_inventory_take 
})

for i, state in ipairs(chest_mark_colors) do
minetest.register_node(":technic:gold_chest".. state, {
	description = "Gold Chest",
	tiles = {"technic_gold_chest_top.png", "technic_gold_chest_top.png", "technic_gold_chest_side.png",
		"technic_gold_chest_side.png", "technic_gold_chest_side.png", "technic_gold_chest_front"..state..".png"},
	paramtype2 = "facedir",
	groups = chest_groups2,
	tube = tubes_properties,
	legacy_facedir_simple = true,
	sounds = default.node_sound_wood_defaults(),
	drop = "technic:gold_chest",
	on_construct = function(pos)
		local meta = minetest.env:get_meta(pos)
		meta:set_string("formspec",gold_chest_formspec)
		meta:set_string("infotext", "Gold Chest")
		local inv = meta:get_inventory()
		inv:set_size("main", gold_chest_inv_size)
	end,

	can_dig =chest_can_dig,

	on_punch = function (pos, node, puncher)
	chest_punched (pos,node,puncher);
	end,
	
	on_receive_fields = function(pos, formname, fields, sender)
        local meta = minetest.env:get_meta(pos);
      		fields.text = fields.text or ""
		meta:set_string("text", fields.text)
		meta:set_string("infotext", '"'..fields.text..'"')
		meta:set_string("formspec",gold_chest_formspec)
	end,

	on_metadata_inventory_move = def_on_metadata_inventory_move,
	on_metadata_inventory_put = def_on_metadata_inventory_put,
	on_metadata_inventory_take = def_on_metadata_inventory_take 
})
end

minetest.register_node(":technic:gold_locked_chest", {
	description = "Gold Locked Chest",
	tiles = {"technic_gold_chest_top.png", "technic_gold_chest_top.png", "technic_gold_chest_side.png",
		"technic_gold_chest_side.png", "technic_gold_chest_side.png", "technic_gold_chest_locked.png"},
	paramtype2 = "facedir",
	drop = "technic:gold_locked_chest",
	groups = chest_groups1,
	tube = tubes_properties,
	legacy_facedir_simple = true,
	sounds = default.node_sound_wood_defaults(),
	after_place_node = function(pos, placer)
		local meta = minetest.env:get_meta(pos)
		meta:set_string("owner", placer:get_player_name() or "")
		meta:set_string("infotext", "Gold Locked Chest (owned by "..
				meta:get_string("owner")..")")
	end,
	on_construct = function(pos)
		local meta = minetest.env:get_meta(pos)
		meta:set_string("formspec",gold_chest_formspec)
		meta:set_string("infotext", "Gold Locked Chest")
		meta:set_string("owner", "")
		local inv = meta:get_inventory()
		inv:set_size("main", gold_chest_inv_size)
	end,

	can_dig =chest_can_dig,

	on_punch = function (pos, node, puncher)
		local meta = minetest.env:get_meta(pos);
		if (has_locked_chest_privilege(meta, puncher)) then
			locked_chest_punched (pos,node,puncher);
		end
	end,
	
	on_receive_fields = function(pos, formname, fields, sender)
		local meta = minetest.env:get_meta(pos);
		fields.text = fields.text or ""
		meta:set_string("text", fields.text)
		meta:set_string("infotext", '"'..fields.text..'"')
		meta:set_string("formspec",gold_chest_formspec)
	end,

	allow_metadata_inventory_move = def_allow_metadata_inventory_move,
	allow_metadata_inventory_put = def_allow_metadata_inventory_put,
	allow_metadata_inventory_take = def_allow_metadata_inventory_take,
	on_metadata_inventory_move = def_on_metadata_inventory_move,
	on_metadata_inventory_put = def_on_metadata_inventory_put,
	on_metadata_inventory_take = def_on_metadata_inventory_take 
})

for i, state in ipairs(chest_mark_colors) do
minetest.register_node(":technic:gold_locked_chest".. state, {
	description = "Gold Locked Chest",
	tiles = {"technic_gold_chest_top.png", "technic_gold_chest_top.png", "technic_gold_chest_side.png",
		"technic_gold_chest_side.png", "technic_gold_chest_side.png", "technic_gold_chest_locked"..state..".png"},
	paramtype2 = "facedir",
	drop = "technic:gold_locked_chest",
	groups = chest_groups2,
	tube = tubes_properties,
	legacy_facedir_simple = true,
	sounds = default.node_sound_wood_defaults(),
	after_place_node = function(pos, placer)
		local meta = minetest.env:get_meta(pos)
		meta:set_string("owner", placer:get_player_name() or "")
		meta:set_string("infotext", "Gold Locked Chest (owned by "..
				meta:get_string("owner")..")")
	end,
	on_construct = function(pos)
		local meta = minetest.env:get_meta(pos)
		meta:set_string("formspec",gold_chest_formspec)
		meta:set_string("infotext", "Gold Locked Chest")
		meta:set_string("owner", "")
		local inv = meta:get_inventory()
		inv:set_size("main", gold_chest_inv_size)
	end,

	can_dig = chest_can_dig,

	on_punch = function (pos, node, puncher)
	        local meta = minetest.env:get_meta(pos);
		if (has_locked_chest_privilege(meta, puncher)) then
		locked_chest_punched (pos,node,puncher);
		end
	end,

	on_receive_fields = function(pos, formname, fields, sender)
		local meta = minetest.env:get_meta(pos);
		fields.text = fields.text or ""
		meta:set_string("text", fields.text)
		meta:set_string("infotext", '"'..fields.text..'"')
		meta:set_string("formspec",gold_chest_formspec)
	end,

	allow_metadata_inventory_move = def_allow_metadata_inventory_move,
	allow_metadata_inventory_put = def_allow_metadata_inventory_put,
	allow_metadata_inventory_take = def_allow_metadata_inventory_take,
	on_metadata_inventory_move = def_on_metadata_inventory_move,
	on_metadata_inventory_put = def_on_metadata_inventory_put,
	on_metadata_inventory_take = def_on_metadata_inventory_take 
})
end

function chest_punched (pos,node,puncher)
	
	local player_tool = puncher:get_wielded_item();
	local item=player_tool:get_name();
	if item == "dye:black" then
		if (hacky_swap_node(pos,"technic:gold_chest_black")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:blue" then
		if (hacky_swap_node(pos,"technic:gold_chest_blue")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:brown" then
		if (hacky_swap_node(pos,"technic:gold_chest_brown")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:cyan" then
		if (hacky_swap_node(pos,"technic:gold_chest_cyan")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:dark_green" then
		if (hacky_swap_node(pos,"technic:gold_chest_dark_green")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:dark_grey" then
		if (hacky_swap_node(pos,"technic:gold_chest_dark_grey")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:green" then
		if (hacky_swap_node(pos,"technic:gold_chest_green")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:grey" then
		if (hacky_swap_node(pos,"technic:gold_chest_grey")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:magenta" then
		if (hacky_swap_node(pos,"technic:gold_chest_magenta")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:orange" then
		if (hacky_swap_node(pos,"technic:gold_chest_orange")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:pink" then
		if (hacky_swap_node(pos,"technic:gold_chest_pink")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:red" then
		if (hacky_swap_node(pos,"technic:gold_chest_red")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:violet" then
		if (hacky_swap_node(pos,"technic:gold_chest_violet")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:white" then
		if (hacky_swap_node(pos,"technic:gold_chest_white")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:yellow" then
		if (hacky_swap_node(pos,"technic:gold_chest_yellow")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end

		local meta = minetest.env:get_meta(pos);
                meta:set_string("formspec", "hack:sign_text_input")
	end


function locked_chest_punched (pos,node,puncher)
	
	local player_tool = puncher:get_wielded_item();
	local item=player_tool:get_name();
	if item == "dye:black" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_black")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:blue" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_blue")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:brown" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_brown")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:cyan" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_cyan")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:dark_green" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_dark_green")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:dark_grey" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_dark_grey")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:green" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_green")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:grey" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_grey")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:magenta" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_magenta")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:orange" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_orange")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:pink" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_pink")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:red" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_red")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:violet" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_violet")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:white" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_white")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end
	if item == "dye:yellow" then
		if (hacky_swap_node(pos,"technic:gold_locked_chest_yellow")) then
			player_tool:take_item(1);
			puncher:set_wielded_item(player_tool);
			return
		   end
		end

		local meta = minetest.env:get_meta(pos);
                meta:set_string("formspec", "hack:sign_text_input")
	end