def.on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
                        if not default.can_interact_with_node(clicker, pos) then
                                return itemstack
                        end

if def.protected then
if minetest.is_protected(pos,clicker:get_player_name()) then
minetest.chat_send_player(clicker:get_player_name(),"This chest is locked and in another's player protection.")
return itemstack
end
end

                        minetest.sound_play(def.sound_open, {gain = 0.3,
                                        pos = pos, max_hear_distance = 10})