anchor.diff:                                [_Node, IP, Port] ->
                                     {list_to_atom(_Node), IP, list_to_integer(Port)};
                                 [_Node, IP] ->
  -                                  {list_to_atom(_Node), IP, ?DEF_LISTEN_PORT};
  +                                  {list_to_atom(_Node), IP, leo_rpc:port()};
                                 [_Node] ->
  -                                  {list_to_atom(_Node), ?DEF_LISTEN_IP, ?DEF_LISTEN_PORT};
  +                                  {list_to_atom(_Node), ?DEF_LISTEN_IP, leo_rpc:port()};
                                 _ ->
                                     {[], 0}
                             end,
  
positive.code:     {ok, Nodes} = leo_rpc_client_manager:connected_nodes(),
      Nodes.
  
  
  %%--------------------------------------------------------------------
  %%  Internal Function
  
negative.code:          multicall/4, multicall/5,
           nb_yield/1, nb_yield/2,
           cast/4,
           ping/1, status/0, node/0, nodes/0, port/0
          ]).
  
  -export([loop_1/4, loop_2/4]).
  