Add "currency" mod.

mods/currency/Money_Info.txt

@@ -0,0 +1,33 @@
+Mine-Geld
+---------
+
+They have no recipe.
+A good starting amount is about 250Mg on a server
+
+You currently get a basic income of 1 Minegeld per day, 
+so long as you dig at least one node in that day 
+and have an empty inventory slot for the money to go in.
+
+Lump Conversion
+
+Coal Lump ~1Mg
+Iron Lump ~4Mg
+Copper Lump ~4Mg
+Gold Lump ~5Mg
+Mese Crystal ~40Mg
+Diamond ~50Mg
+
+Ingot Conversion
+
+Steel Ingot ~5Mg
+Copper Ingot ~5Mg
+Gold Ingot ~6Mg
+
+Block Conversion
+
+Coal Block ~9Mg
+Steel Block ~45Mg
+Copper Block ~45Mg
+Gold Block ~54Mg
+Mese Block ~360Mg
+Diamond Block ~450Mg

mods/currency/README.md

@@ -0,0 +1,4 @@
+currency
+========
+
+Repo for Currency Mod

mods/currency/barter.lua

@@ -0,0 +1,165 @@
+barter = {}
+
+barter.chest = {}
+barter.chest.formspec = {
+	main = "size[8,9]"..
+		"list[current_name;pl1;0,0;3,4;]"..
+		"list[current_name;pl2;5,0;3,4;]"..
+		"list[current_player;main;0,5;8,4;]",
+	pl1 = {
+		start = "button[3,1;1,1;pl1_start;Start]",
+		player = function(name) return "label[3,0;"..name.."]" end,
+		accept1 = "button[3,1;1,1;pl1_accept1;Confirm]"..
+				"button[3,2;1,1;pl1_cancel;Cancel]",
+		accept2 = "button[3,1;1,1;pl1_accept2;Exchange]"..
+				"button[3,2;1,1;pl1_cancel;Cancel]",
+	},
+	pl2 = {
+		start = "button[4,1;1,1;pl2_start;Start]",
+		player = function(name) return "label[4,0;"..name.."]" end,
+		accept1 = "button[4,1;1,1;pl2_accept1;Confirm]"..
+				"button[4,2;1,1;pl2_cancel;Cancel]",
+		accept2 = "button[4,1;1,1;pl2_accept2;Exchange]"..
+				"button[4,2;1,1;pl2_cancel;Cancel]",
+	},
+}
+
+barter.chest.check_privilege = function(listname,playername,meta)
+	if listname == "pl1" then
+		if playername ~= meta:get_string("pl1") then
+			return false
+		elseif meta:get_int("pl1step") ~= 1 then
+			return false
+		end
+	end
+	if listname == "pl2" then
+		if playername ~= meta:get_string("pl2") then
+			return false
+		elseif meta:get_int("pl2step") ~= 1 then
+			return false
+		end
+	end
+	return true
+end
+
+barter.chest.update_formspec = function(meta)
+	formspec = barter.chest.formspec.main
+	pl_formspec = function (n)
+		if meta:get_int(n.."step")==0 then
+			formspec = formspec .. barter.chest.formspec[n].start
+		else
+			formspec = formspec .. barter.chest.formspec[n].player(meta:get_string(n))
+			if meta:get_int(n.."step") == 1 then
+				formspec = formspec .. barter.chest.formspec[n].accept1
+			elseif meta:get_int(n.."step") == 2 then
+				formspec = formspec .. barter.chest.formspec[n].accept2
+			end
+		end
+	end
+	pl_formspec("pl1") pl_formspec("pl2")
+	meta:set_string("formspec",formspec)
+end
+
+barter.chest.give_inventory = function(inv,list,playername)
+	player = minetest.get_player_by_name(playername)
+	if player then
+		for k,v in ipairs(inv:get_list(list)) do
+			player:get_inventory():add_item("main",v)
+			inv:remove_item(list,v)
+		end
+	end
+end
+
+barter.chest.cancel = function(meta)
+	barter.chest.give_inventory(meta:get_inventory(),"pl1",meta:get_string("pl1"))
+	barter.chest.give_inventory(meta:get_inventory(),"pl2",meta:get_string("pl2"))
+	meta:set_string("pl1","")
+	meta:set_string("pl2","")
+	meta:set_int("pl1step",0)
+	meta:set_int("pl2step",0)
+end
+
+barter.chest.exchange = function(meta)
+	barter.chest.give_inventory(meta:get_inventory(),"pl1",meta:get_string("pl2"))
+	barter.chest.give_inventory(meta:get_inventory(),"pl2",meta:get_string("pl1"))
+	meta:set_string("pl1","")
+	meta:set_string("pl2","")
+	meta:set_int("pl1step",0)
+	meta:set_int("pl2step",0)
+end
+
+minetest.register_node("currency:barter", {
+        drawtype = "nodebox",
+	description = "Barter Table",
+	paramtype = "light",
+	paramtype2 = "facedir",
+	tiles = {"barter_top.png",
+	                "barter_base.png",
+	                "barter_side.png"},
+	inventory_image = "barter_top.png",
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{-0.500000,0.312500,-0.500000,0.500000,0.500000,0.500000},
+			{-0.437500,-0.500000,-0.437500,-0.250000,0.500000,-0.250000}, 
+			{-0.437500,-0.500000,0.250000,-0.250000,0.500000,0.437500},
+			{0.250000,-0.500000,-0.437500,0.437500,0.500000,-0.250000},
+			{0.250000,-0.500000,0.250000,0.437500,0.500000,0.447500}, 
+		},
+	},
+	groups = {choppy=2,oddly_breakable_by_hand=2},
+	sounds = default.node_sound_wood_defaults(),
+	on_construct = function(pos)
+		local meta = minetest.get_meta(pos)
+		meta:set_string("infotext", "Barter Table")
+		meta:set_string("pl1","")
+		meta:set_string("pl2","")
+		barter.chest.update_formspec(meta)
+		local inv = meta:get_inventory()
+		inv:set_size("pl1", 3*4)
+		inv:set_size("pl2", 3*4)
+	end,
+	on_receive_fields = function(pos, formname, fields, sender)
+		local meta = minetest.get_meta(pos)
+		pl_receive_fields = function(n)
+			if fields[n.."_start"] and meta:get_string(n) == "" then
+				meta:set_string(n,sender:get_player_name())
+			end
+			if meta:get_string(n) == "" then
+				meta:set_int(n.."step",0)
+			elseif meta:get_int(n.."step")==0 then
+				meta:set_int(n.."step",1)
+			end
+			if sender:get_player_name() == meta:get_string(n) then
+				if meta:get_int(n.."step")==1 and fields[n.."_accept1"] then
+					meta:set_int(n.."step",2)
+				end
+				if meta:get_int(n.."step")==2 and fields[n.."_accept2"] then
+					meta:set_int(n.."step",3)
+					if n == "pl1" and meta:get_int("pl2step") == 3 then barter.chest.exchange(meta) end
+					if n == "pl2" and meta:get_int("pl1step") == 3 then barter.chest.exchange(meta) end
+				end
+				if fields[n.."_cancel"] then barter.chest.cancel(meta) end
+			end
+		end
+		pl_receive_fields("pl1") pl_receive_fields("pl2")
+		-- End
+		barter.chest.update_formspec(meta)
+	end,
+	allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
+		local meta = minetest.get_meta(pos)
+		if not barter.chest.check_privilege(from_list,player:get_player_name(),meta) then return 0 end
+		if not barter.chest.check_privilege(to_list,player:get_player_name(),meta) then return 0 end
+		return count
+	end,
+	allow_metadata_inventory_put = function(pos, listname, index, stack, player)
+		local meta = minetest.get_meta(pos)
+		if not barter.chest.check_privilege(listname,player:get_player_name(),meta) then return 0 end
+		return stack:get_count()
+	end,
+	allow_metadata_inventory_take = function(pos, listname, index, stack, player)
+		local meta = minetest.get_meta(pos)
+		if not barter.chest.check_privilege(listname,player:get_player_name(),meta) then return 0 end
+		return stack:get_count()
+	end,
+})

mods/currency/crafting.lua

@@ -0,0 +1,71 @@
+minetest.register_craft({
+	output = 'currency:safe',
+	recipe = {
+		{'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot'},
+		{'default:steel_ingot', '', 'default:steel_ingot'},
+		{'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot'},
+	}
+})
+
+minetest.register_craft({
+	output = 'currency:shop',
+	recipe = {
+		{'default:sign_wall'},
+		{'default:chest_locked'},
+	}
+})
+
+minetest.register_craft({
+	output = 'currency:barter',
+	recipe = {
+		{'default:sign_wall'},
+		{'default:chest'},
+	}
+})
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "currency:minegeld_5",
+	recipe = {"currency:minegeld", "currency:minegeld", "currency:minegeld", "currency:minegeld", "currency:minegeld"},
+})
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "currency:minegeld_10",
+	recipe = {"currency:minegeld_5", "currency:minegeld_5"},
+})
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "currency:minegeld_5 2",
+	recipe = {"currency:minegeld_10"},
+})
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "currency:minegeld 5",
+	recipe = {"currency:minegeld_5"},
+})
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "currency:minegeld_bundle",
+	recipe = {
+		"group:minegeld",
+		"group:minegeld",
+		"group:minegeld",
+		"group:minegeld",
+		"group:minegeld",
+		"group:minegeld",
+		"group:minegeld",
+		"group:minegeld",
+		"group:minegeld"
+	},
+})
+
+minetest.register_craft({
+	type = "fuel",
+	recipe = "currency:minegeld_bundle",
+	burntime = 1,
+})
+

mods/currency/craftitems.lua

@@ -0,0 +1,26 @@
+minetest.register_craftitem("currency:minegeld", {
+    description = "1 MineGeld Note",
+    inventory_image = "minegeld.png",
+        stack_max = 30000,
+		groups = {minegeld = 1}
+})
+
+minetest.register_craftitem("currency:minegeld_5", {
+    description = "5 MineGeld Note",
+    inventory_image = "minegeld_5.png",
+        stack_max = 30000,
+		groups = {minegeld = 1}
+})
+
+minetest.register_craftitem("currency:minegeld_10", {
+    description = "10 MineGeld Note",
+    inventory_image = "minegeld_10.png",
+        stack_max = 30000,
+		groups = {minegeld = 1}
+})
+
+minetest.register_craftitem("currency:minegeld_bundle", {
+    description = "Bundle of random Minegeld notes",
+    inventory_image = "minegeld_bundle.png",
+        stack_max = 30000,
+})

mods/currency/depends.txt

@@ -0,0 +1 @@
+default

mods/currency/description.txt

@@ -0,0 +1 @@
+Provides shops, barter tables, safes, and three denominations of currency, called "Minegeld".

mods/currency/income.lua

@@ -0,0 +1,40 @@
+players_income = {}
+
+local timer = 0
+minetest.register_globalstep(function(dtime)
+    timer = timer + dtime;
+    if timer >= 720 then --720 for one day
+        timer = 0
+        for _,player in ipairs(minetest.get_connected_players()) do
+                local name = player:get_player_name()
+                if players_income[name] == nil then
+                    players_income[name] = 0
+                end
+                players_income[name] = 1
+                print("[Currency] basic income for "..name.."")
+        end
+    end
+end)
+
+earn_income = function(player)
+    if not player or player.is_fake_player then return end
+    local name = player:get_player_name()
+    if players_income[name] == nil then
+        players_income[name] = 0
+    end
+    if players_income[name] > 0 then
+        count = players_income[name]
+        local inv = player:get_inventory()
+        inv:add_item("main", {name="currency:minegeld_5", count=count})
+        players_income[name] = 0
+        print("[Currency] added basic income for "..name.." to inventory")
+    end
+end
+
+minetest.register_on_dignode(function(pos, oldnode, digger)
+	earn_income(digger)
+end)
+
+minetest.register_on_placenode(function(pos, node, placer)
+	earn_income(placer)
+end)

mods/currency/init.lua

@@ -0,0 +1,20 @@
+print(" Currency mod loading... ")
+local modpath = minetest.get_modpath("currency")
+
+dofile(modpath.."/craftitems.lua")
+print("[Currency] Craft_items Loaded!")
+dofile(modpath.."/shop.lua")
+print("[Currency] Shop Loaded!")
+dofile(modpath.."/barter.lua")
+print("[Currency]  Barter Loaded!")
+dofile(modpath.."/safe.lua")
+print("[Currency] Safe Loaded!")
+dofile(modpath.."/crafting.lua")
+print("[Currency] Crafting Loaded!")
+
+if minetest.setting_getbool("creative_mode") then
+	print("[Currency] Creative mode in use, skipping basic income.")
+else
+	dofile(modpath.."/income.lua")
+	print("[Currency] Income Loaded!")
+end

mods/currency/mod.conf

@@ -0,0 +1 @@
+name = currency

mods/currency/safe.lua

@@ -0,0 +1,103 @@
+function default.get_safe_formspec(pos)
+	local spos = pos.x .. "," .. pos.y .. "," ..pos.z
+	local formspec =
+		"size[8,9]"..
+		"list[nodemeta:".. spos .. ";main;1,1;6,2;]"..
+		"list[current_player;main;0,5;8,4;]"
+	return formspec
+end
+
+local function has_safe_privilege(meta, player)
+	if not player or player:get_player_name() ~= meta:get_string("owner") then
+		return false
+	end
+	return true
+end
+
+minetest.register_node("currency:safe", {
+        description = "Safe",
+	inventory_image = "safe_front.png",
+	paramtype = "light",
+	paramtype2 = "facedir",
+	tiles = {"safe_side.png",
+	                "safe_side.png",
+			"safe_side.png",
+			"safe_side.png",
+			"safe_side.png",
+			"safe_front.png",},
+	is_ground_content = false,
+	groups = {cracky=1},
+	after_place_node = function(pos, placer)
+		local meta = minetest.get_meta(pos)
+		meta:set_string("owner", placer:get_player_name() or "")
+		meta:set_string("infotext", "Safe (owned by "..
+				meta:get_string("owner")..")")
+	end,
+	on_construct = function(pos)
+		local meta = minetest.get_meta(pos)
+		meta:set_string("infotext", "Safe")
+		meta:set_string("owner", "")
+		local inv = meta:get_inventory()
+		inv:set_size("main", 6*2)
+	end,
+	can_dig = function(pos,player)
+		local meta = minetest.get_meta(pos);
+		local inv = meta:get_inventory()
+		return inv:is_empty("main") and has_safe_privilege(meta, player)
+	end,
+	allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
+		local meta = minetest.get_meta(pos)
+		if not has_safe_privilege(meta, player) then
+			minetest.log("action", player:get_player_name()..
+					" tried to access a safe belonging to "..
+					meta:get_string("owner").." at "..
+					minetest.pos_to_string(pos))
+			return 0
+		end
+		return count
+	end,
+    allow_metadata_inventory_put = function(pos, listname, index, stack, player)
+		local meta = minetest.get_meta(pos)
+		if not has_safe_privilege(meta, player) then
+			minetest.log("action", player:get_player_name()..
+					" tried to access a safe belonging to "..
+					meta:get_string("owner").." at "..
+					minetest.pos_to_string(pos))
+			return 0
+		end
+		return stack:get_count()
+	end,
+    allow_metadata_inventory_take = function(pos, listname, index, stack, player)
+		local meta = minetest.get_meta(pos)
+		if not has_safe_privilege(meta, player) then
+			minetest.log("action", player:get_player_name()..
+					" tried to access a safe belonging to "..
+					meta:get_string("owner").." at "..
+					minetest.pos_to_string(pos))
+			return 0
+		end
+		return stack:get_count()
+	end,
+	on_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
+		minetest.log("action", player:get_player_name()..
+				" moves stuff in safe at "..minetest.pos_to_string(pos))
+	end,
+    on_metadata_inventory_put = function(pos, listname, index, stack, player)
+		minetest.log("action", player:get_player_name()..
+				" moves stuff to safe at "..minetest.pos_to_string(pos))
+	end,
+    on_metadata_inventory_take = function(pos, listname, index, stack, player)
+		minetest.log("action", player:get_player_name()..
+				" takes stuff from safe at "..minetest.pos_to_string(pos))
+	end,
+	on_rightclick = function(pos, node, clicker)
+		local meta = minetest.get_meta(pos)
+		if has_safe_privilege(meta, clicker) then
+			minetest.show_formspec(
+				clicker:get_player_name(),
+				"currency:safe",
+				default.get_safe_formspec(pos)
+			)
+		end
+	end,
+})

mods/currency/shop.lua

@@ -0,0 +1,195 @@
+default.shop = {}
+default.shop.current_shop = {}
+default.shop.formspec = {
+	customer = function(pos)
+		local list_name = "nodemeta:"..pos.x..','..pos.y..','..pos.z
+		local formspec = "size[8,9.5]"..
+		"label[0,0;Customer gives (pay here !)]"..
+		"list[current_player;customer_gives;0,0.5;3,2;]"..
+		"label[0,2.5;Customer gets]"..
+		"list[current_player;customer_gets;0,3;3,2;]"..
+		"label[5,0;Owner wants]"..
+		"list["..list_name..";owner_wants;5,0.5;3,2;]"..
+		"label[5,2.5;Owner gives]"..
+		"list["..list_name..";owner_gives;5,3;3,2;]"..
+		"list[current_player;main;0,5.5;8,4;]"..
+		"button[3,2;2,1;exchange;Exchange]"
+		return formspec
+	end,
+	owner = function(pos)
+		local list_name = "nodemeta:"..pos.x..','..pos.y..','..pos.z
+		local formspec = "size[8,9.5]"..
+		"label[0,0;Customers gave:]"..
+		"list["..list_name..";customers_gave;0,0.5;3,2;]"..
+		"label[0,2.5;Your stock:]"..
+		"list["..list_name..";stock;0,3;3,2;]"..
+		"label[5,0;You want:]"..
+		"list["..list_name..";owner_wants;5,0.5;3,2;]"..
+		"label[5,2.5;In exchange, you give:]"..
+		"list["..list_name..";owner_gives;5,3;3,2;]"..
+		"label[0,5;Owner, Use(E)+Place(RMB) for customer interface]"..
+		"list[current_player;main;0,5.5;8,4;]"
+		return formspec
+	end,
+}
+
+default.shop.check_privilege = function(listname,playername,meta)
+	--[[if listname == "pl1" then
+		if playername ~= meta:get_string("pl1") then
+			return false
+		elseif meta:get_int("pl1step") ~= 1 then
+			return false
+		end
+	end
+	if listname == "pl2" then
+		if playername ~= meta:get_string("pl2") then
+			return false
+		elseif meta:get_int("pl2step") ~= 1 then
+			return false
+		end
+	end]]
+	return true
+end
+
+
+default.shop.give_inventory = function(inv,list,playername)
+	player = minetest.get_player_by_name(playername)
+	if player then
+		for k,v in ipairs(inv:get_list(list)) do
+			player:get_inventory():add_item("main",v)
+			inv:remove_item(list,v)
+		end
+	end
+end
+
+default.shop.cancel = function(meta)
+	--[[default.shop.give_inventory(meta:get_inventory(),"pl1",meta:get_string("pl1"))
+	default.shop.give_inventory(meta:get_inventory(),"pl2",meta:get_string("pl2"))
+	meta:set_string("pl1","")
+	meta:set_string("pl2","")
+	meta:set_int("pl1step",0)
+	meta:set_int("pl2step",0)]]
+end
+
+default.shop.exchange = function(meta)
+	--[[default.shop.give_inventory(meta:get_inventory(),"pl1",meta:get_string("pl2"))
+	default.shop.give_inventory(meta:get_inventory(),"pl2",meta:get_string("pl1"))
+	meta:set_string("pl1","")
+	meta:set_string("pl2","")
+	meta:set_int("pl1step",0)
+	meta:set_int("pl2step",0)]]
+end
+
+minetest.register_node("currency:shop", {
+	description = "Shop",
+	paramtype2 = "facedir",
+	tiles = {"shop_top.png",
+	                "shop_top.png",
+			"shop_side.png",
+			"shop_side.png",
+			"shop_side.png",
+			"shop_front.png"},
+	inventory_image = "shop_front.png",
+	groups = {choppy=2,oddly_breakable_by_hand=2},
+	sounds = default.node_sound_wood_defaults(),
+	after_place_node = function(pos, placer, itemstack)
+		local owner = placer:get_player_name()
+		local meta = minetest.get_meta(pos)
+		meta:set_string("infotext", "Exchange shop (owned by "..owner..")")
+		meta:set_string("owner",owner)
+		--[[meta:set_string("pl1","")
+		meta:set_string("pl2","")]]
+		local inv = meta:get_inventory()
+		inv:set_size("customers_gave", 3*2)
+		inv:set_size("stock", 3*2)
+		inv:set_size("owner_wants", 3*2)
+		inv:set_size("owner_gives", 3*2)
+	end,
+	on_rightclick = function(pos, node, clicker, itemstack)
+		clicker:get_inventory():set_size("customer_gives", 3*2)
+		clicker:get_inventory():set_size("customer_gets", 3*2)
+		default.shop.current_shop[clicker:get_player_name()] = pos
+		local meta = minetest.get_meta(pos)
+		if clicker:get_player_name() == meta:get_string("owner") and not clicker:get_player_control().aux1 then
+			minetest.show_formspec(clicker:get_player_name(),"currency:shop_formspec",default.shop.formspec.owner(pos))
+		else
+			minetest.show_formspec(clicker:get_player_name(),"currency:shop_formspec",default.shop.formspec.customer(pos))
+		end
+	end,
+	allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
+		local meta = minetest.get_meta(pos)
+		if player:get_player_name() ~= meta:get_string("owner") then return 0 end
+		return count
+	end,
+	allow_metadata_inventory_put = function(pos, listname, index, stack, player)
+		local meta = minetest.get_meta(pos)
+		if player:get_player_name() ~= meta:get_string("owner") then return 0 end
+		return stack:get_count()
+	end,
+	allow_metadata_inventory_take = function(pos, listname, index, stack, player)
+		local meta = minetest.get_meta(pos)
+		if player:get_player_name() ~= meta:get_string("owner") then return 0 end
+		return stack:get_count()
+	end,
+	can_dig = function(pos, player)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		return inv:is_empty("stock") and inv:is_empty("customers_gave") and inv:is_empty("owner_wants") and inv:is_empty("owner_gives")
+	end
+})
+
+minetest.register_on_player_receive_fields(function(sender, formname, fields)
+	if formname == "currency:shop_formspec" and fields.exchange ~= nil and fields.exchange ~= "" then
+		local name = sender:get_player_name()
+		local pos = default.shop.current_shop[name]
+		local meta = minetest.get_meta(pos)
+		if meta:get_string("owner") == name then
+			minetest.chat_send_player(name,"This is your own shop, you can't exchange to yourself !")
+		else
+			local minv = meta:get_inventory()
+			local pinv = sender:get_inventory()
+			local invlist_tostring = function(invlist)
+				local out = {}
+				for i, item in pairs(invlist) do
+					out[i] = item:to_string()
+				end
+				return out
+			end
+			local wants = minv:get_list("owner_wants")
+			local gives = minv:get_list("owner_gives")
+			if wants == nil or gives == nil then return end -- do not crash the server
+			-- Check if we can exchange
+			local can_exchange = true
+			local owners_fault = false
+			for i, item in pairs(wants) do
+				if not pinv:contains_item("customer_gives",item) then
+					can_exchange = false
+				end
+			end
+			for i, item in pairs(gives) do
+				if not minv:contains_item("stock",item) then
+					can_exchange = false
+					owners_fault = true
+				end
+			end
+			if can_exchange then
+				for i, item in pairs(wants) do
+					pinv:remove_item("customer_gives",item)
+					minv:add_item("customers_gave",item)
+				end
+				for i, item in pairs(gives) do
+					minv:remove_item("stock",item)
+					pinv:add_item("customer_gets",item)
+				end
+				minetest.chat_send_player(name,"Exchanged!")
+			else
+				if owners_fault then
+					minetest.chat_send_player(name,"Exchange can not be done, contact the shop owner.")
+				else
+					minetest.chat_send_player(name,"Exchange can not be done, check if you put all items !")
+				end
+			end
+		end
+	end
+end)
+