sparktech = {}
function sparktech.register_wrench(name, dictionary)
  local dig_stlye_alt = minetest.setting_getbool("spark_dig_stlye_alt")
  local on_use = nil
  if dig_stlye_alt then
    on_use = function() return nil end
  end
  on_place = function(itemstack, placer, pointed_thing)
    if pointed_thing["type"] == "node" then
      local node = minetest.get_node(pointed_thing["under"])
      if minetest.get_item_group(node["name"], "sparktech_techy") > 0 then
        local nodemeta = minetest.get_meta(pointed_thing["under"])
        local item = ItemStack(node["name"])
        if minetest.get_item_group(item:get_name(), "sparktech_energy_storeonbreak") > 0 then
          item:set_metadata(nodemeta:get_int("energy"))
        end
        local check = minetest.dig_node(pointed_thing["under"])
        if check then
          local inv = placer:get_inventory()
          if inv:room_for_item("main", item) then
            inv:add_item("main", item)
          else
            minetest.item_drop(item, placer, pointed_thing["under"])
          end
        end
      end
    end
    return itemstack
  end
  if dictionary["on_use"] == nil then
    dictionary["on_use"] = on_use
  end
  if dictionary["on_place"] == nil then
    dictionary["on_place"] = on_place
  end

  minetest.register_tool(name, dictionary)
end