anchor.diff:  %% Retrieve certificate. 
   %% Certificate will be passed to exo_json:encode() in order
   %% to be translated to JSON.
  -get_certificate_body(_CallingService, _ServiceName) ->
  +get_certificate_body(_ServiceName) ->
       {struct, 
        [
         %% Topic tree patterns that this node is authorized to
  
positive.code: %% CAlled by local exo http server
  handle_rpc("authorize_local_message", Args) ->
      {ok, ServiceName} = rvi_common:get_json_element(["service_name"], Args),
      {ok, CallingService} = rvi_common:get_json_element(["calling_service"], Args),
      authorize_local_message(ServiceName, CallingService);
  
  handle_rpc("authorize_remote_message", Args) ->
      {ok, ServiceName} = rvi_common:get_json_element(["service_name"], Args),
  
negative.code: %%
  handle_call({rvi_call, authorize_local_message, Args}, _From, State) ->
      {_, ServiceName} = lists:keyfind(service_name, 1, Args),
      ?info("authorize_rpc:authorize_local_message(gen_server):  args:            ~p", [ Args]),
      ?info("authorize_rpc:authorize_local_message(gen_server):  service name:    ~p", [ ServiceName]),
      {reply, authorize_local_message(ServiceName), State};
  
  handle_call({rvi_call, authorize_remote_message, Args}, _From, State) ->
      {_, ServiceName} = lists:keyfind(service_name, 1, Args),
  