Enroll card

Use this demo to save a new card before testing it in the saved-card payment demo:

1. Paste a secure_token minted by your backend for the current customer.
2. Click Prepare card fields so the SDK initializes with that customer and token.
3. Enter a test card in the secure card fields rendered by the SDK.
4. Click Save card to call enrollCard().
5. Copy the returned card_id or open Saved cards and fetch the customer’s cards.

When Card-on-File is enabled for the business, enrollCard() also creates the subscription and returns subscription_id. When it is not enabled, the SDK stores the card without a subscription.