anchor.diff:  %%% Internal functions
   %%%===================================================================
   
  -%% @doc Generate advertisements and advertisement contracts.
  +%% @private
   create_ads_and_contracts(Ads, Contracts) ->
       AdIds = lists:map(fun(_) ->
                                 {ok, Unique} = lasp_unique:unique(),
  
positive.code: 
                  end, AdIds).
  
  
negative.code:     %% Generate actor identifier.
      Actor = self(),
  
      %% Build DAG.
      {ok, Ads, AdList} = build_dag(),
      lager:info("AdList: ~p", [hd(AdList)]),
  
      %% Initialize triggers.
      launch_triggers(AdList, Ads, Actor),
  
      {ok, #state{actor=Actor, ads=Ads}}.
  
  %% @private
  -spec handle_call(term(), {pid(), term()}, #state{}) ->
  