how to get photo file data ([]byte)

[hdbjlizhe]

code as follows，how can I get the photo file data here. I want to store the photo to path named xxx.jpg，thanks a lot

dispatcher.OnNewMessage(func(ctx context.Context, e tg.Entities, update *tg.UpdateNewMessage) error {
   if msg,ok:=update.Message.(*tg.Message);ok{
      switch media := update.Message.(*tg.Message).Media.(type) {
      case *tg.MessageMediaPhoto: 
      //how can I get the photo file data here. I want to store the photo to path named xxx.jpg
      }
   }
}