Traitor/mods/lobby/tool.lua

minetest.register_craftitem('lobby:shank', {
   description = 'Traitor\'s Shank',
   inventory_image = 'lobby_shank.png',
   groups = {not_in_creative_inventory=1},
   on_use = function(itemstack, player, pointed_thing)
      local physics_table = player:get_physics_override()
      if physics_table.speed ~= 0 then
         local traitor = player:get_player_name()
         local obj = pointed_thing.ref
         if obj and pointed_thing.type == "object" then
            local player_name = obj:get_player_name()
            if player_name ~= '' then
               local map_name = lobby.game[traitor]
               local victim = minetest.get_player_by_name(player_name)
               victim:set_hp(0)
               local count = lobby.map[map_name]
               if count == 1 then
                  lobby.traitor_win(traitor, map_name)
                  itemstack:take_item()
                  return itemstack
               end
            end
         end
      end
   end,
   on_drop = function(itemstack, dropper, pos)
      return
   end,
})