     IO.puts("Block #{num} saved in pool")
   end
 
+  def add_block(nil) do
+
+  end
+
   #cross check block hash between different seeds
   def cross_check(height) do
     random1 = Enum.random(0..9)

      { :ok , block } ->
        block
      { :error, %{"code" => num}} when num < 0 ->
        Process.sleep(15000)
        start()
      { :error, _reason} ->
        get_block_by_height(random, height)
    end

    case Blockchain.get_current_height(random) do
      { :ok , height } ->
        { :ok , height }
      { :error, _reason} ->
        get_current_height(random)
    end
