[<reference> exchange token confirmation]-> [<input> menu option] [menu option]-> [<choice> 1.Confirm] [1.Confirm]-> yes [Process exchange request *(celery tasks)] [Process exchange request *(celery tasks)]-> [<reference> complete] [1.Confirm]-> no [<choice> 2. Cancel] [2. Cancel]-> yes [<reference> start menu] [2. Cancel]-> no [<reference> exit invalid menu option]