Embedded checkout (iframe SDK)

<script src="https://pay.puffinmoney.com/puffin.js"></script>

<button id="pay">Pay 25 USDC</button>
<script>
  document.getElementById('pay').onclick = () =>
    PuffinPay.open({
      intentId: 'INTENT_ID_FROM_YOUR_SERVER',
      onSuccess: (checkout) => (window.location = '/thanks'),
      onExpired: () => alert('Payment window expired — try again'),
      onClose:   () => console.log('Customer closed checkout'),
    });
</script>

PuffinPay.openLink({
  slug: 'consulting-invoice-x7k2m9',
  amount: '150.00',            // omit if the link has a fixed amount
  customerEmail: 'buyer@example.com',
  onSuccess: () => (window.location = '/thanks'),
});