3. Handle Expiration

Payments expire after 30 minutes by default. Handle this gracefully:

async function checkPaymentStatus(reference) {
  const result = await client.getPayment(reference);

  if (result.payment.status === 'expired') {
    // Offer to create a new payment
    return { expired: true, message: 'Payment expired. Please try again.' };
  }

  return result.payment;
}