meta = minetest.get_meta(pos)

if meta == nil then
minetest.chat_send_player(player:get_player_name(),"FATAL SHOP MOD ERROR!")
return
end
local type=meta:get_int("type")
local inv = meta:get_inventory()
local pinv=player:get_inventory()
local pname=player:get_player_name()
if meta ~= nil and pressed["buy" .. n] then
        local name=inv:get_stack("give" .. n,1):get_name()
        local stack=name .." ".. inv:get_stack("give" .. n,1):get_count()
        local pay=inv:get_stack("pay" .. n,1):get_name() .." ".. inv:get_stack("pay" .. n,1):get_count()
        if name~="" then

        if string.find(name,"ingot")~= nil then
        minetest.chat_send_player("YOU CANNOT BUY THIS ITEM.")
        return
        end