# Payment Confirmation

Review screen before submitting a payment. Shows invoice details, selected payment method, and payment amount.

***

## Usage

```typescript
const confirmation = client.components.paymentConfirmation({
  containerId: 'confirmation',
  invoiceId: 'inv_xxx',
  paymentMethodId: 'pm_xxx',
  customerId: 'cus_xxx',
  onPaymentSuccess: (payment) => {
    console.log('Payment successful:', payment.id);
  },
  onPaymentError: (error) => {
    console.error('Payment failed:', error);
  },
  onBack: () => {
    console.log('Back clicked');
  },
});
```

***

## Configuration

### PaymentConfirmationConfig

| Property           | Type                         | Required | Description                      |
| ------------------ | ---------------------------- | -------- | -------------------------------- |
| `containerId`      | `string`                     | Yes      | ID of the container element      |
| `invoiceId`        | `string`                     | Yes      | Invoice being paid               |
| `paymentMethodId`  | `string`                     | Yes      | Selected payment method          |
| `customerId`       | `string`                     | Yes      | Customer making the payment      |
| `theme`            | `ThemeConfig`                | No       | Custom theme configuration       |
| `onConfirm`        | `() => void`                 | No       | Called when payment is initiated |
| `onBack`           | `() => void`                 | No       | Called when "Back" is clicked    |
| `onPaymentSuccess` | `(payment: Payment) => void` | No       | Called when payment succeeds     |
| `onPaymentError`   | `(error: Error) => void`     | No       | Called when payment fails        |
| `onError`          | `(error: Error) => void`     | No       | Called on other errors           |

***

## Payment Object

The `onPaymentSuccess` callback receives a `Payment` object:

```typescript
interface Payment {
  id: string;
  status: 'PENDING' | 'COMPLETED' | 'FAILED';
  amount: number;
  currency: string;
  invoice_id: string;
  payment_method_id: string;
  created_at: string;
  // ... additional fields
}
```

***

## Example

```html
<div id="confirmation"></div>

<script type="module">
  import { AlternativeClient } from '@getalternative/partner-sdk';

  const client = new AlternativeClient({
    clientId: 'your-client-id',
    clientSecret: 'your-client-secret',
  });

  // Get IDs from URL or state
  const params = new URLSearchParams(window.location.search);

  const confirm = client.components.paymentConfirmation({
    containerId: 'confirmation',
    invoiceId: params.get('invoice'),
    paymentMethodId: params.get('payment_method'),
    customerId: params.get('customer'),
    onPaymentSuccess: (payment) => {
      // Redirect to success page
      window.location.href = `/success?payment=${payment.id}`;
    },
    onPaymentError: (error) => {
      // Show error or retry
      alert('Payment failed: ' + error.message);
    },
    onBack: () => {
      window.history.back();
    },
  });
</script>
```

***

## Display

The confirmation screen shows:

* Invoice summary (number, amount, due date)
* Selected payment method details
* Total amount to be charged
* "Pay Now" button to submit payment
* "Back" button to return to previous screen


---

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