Any reason for Amount being a data-structure?

[christianschmizz]

Would s/o please explain to me why Amount is a struct and not just a type alias which I expected to be more simple and sufficient?

// Amount is a datastructure that stores the amount being used for calculations.
type Amount struct {
	val int64
}

It seems more odd when I saw when the Amount is fetched we are getting the value.

func (m *Money) Amount() int64 {
	return m.amount.val
}

[Rhymond]

good point, you're right it would be more sufficient to use type alias instead