anchor.diff:          {player_won, {player, _, _, Bet}, _} -> 
               credits_server:deposit(Who, Bet);
           {house_won, {player, _, _, Bet}, _} ->
  -            credits_server:withdraw(Who, Bet)
  +            credits_server:withdraw(Who, Bet);
  +        _ -> ok
       end,
       format_result(Res).
    
  
positive.code:             nani_bot:say(To, [From, ": ", Msg])
      end.
  
  handle_bet_command(Arg) ->
      case try_parse_int(Arg) of
          {ok, Amount} -> 
              Res = blackjack:bet(frotz, Amount),
              format_result(Res);
          Err -> Err
      end.
  
  handle_deal_command() ->
      Res = blackjack:deal(frotz),
      format_result(Res).
  
  handle_hit_command() ->
      Res = blackjack:hit(frotz),
      format_result(Res).
  
  handle_status_command() ->
  
negative.code:          terminate/2, code_change/3]).
  
  %% handlers
  -export([handle_deal_command/1,
           handle_bet_command/2,
           handle_hit_command/1,
           handle_status_command/0,
           handle_credits_command/1,
           handle_stand_command/1]).
  