menu

type Menu struct {
	Title       string
	Items       []*MenuItem
	CurrentItem int
	Parent      *Menu
	ExitAction  func()
}

type MenuItem struct {
	ID          string
	Title       string
	Description string
	Action      func() error
	SubMenu     *Menu
}

type MenuSystem struct {
	CurrentMenu       *Menu
	RootMenu          *Menu
	IsActive          bool
	ProgressIndicator interface {
		Pause()
		Resume()
		IsPaused() bool
		Stop()
		Start()
	}
	Blockchain interface {
		SetMenuActive(bool)
	}
}