func scaledValue(unscaled *big.Int, scale, newScale int) int64 {
	dif := scale - newScale
	if dif == 0 {
		return unscaled.Int64()
	}

	// Handle scale up
	// This is an easy case, we do not need to care about rounding and overflow.
	// If any intermediate operation causes overflow, the result will overflow.
	if dif < 0 {
		return unscaled.Int64() * int64(math.Pow10(-dif))
	}

	// Handle scale down