faparicior

final class Money
{
    private string $amount;
    private string $currency;

    public function __construct(private string $amount, private string $currency)
    {
        if (!is_numeric($amount)) {
            throw new InvalidAmountException::notNumeric($amount);
        }

faparicior

final class Money
{
    public function __construct(private string $amount, private Currency $currency)
    {}

    public function amount(): string
    {
        return $this->amount;
    }

faparicior

readonly class Money
{
    private function __construct(private string $amount, private Currency $currency)
    {}

    public static function eur(string $amount): self
    {
        return new static($amount, Currency::eur());
    }