Embedding SDK for the subscription payment widget

GET /Cards/Sbp/embed.js

The same file as on the payment domain: the mode follows the URL it was loaded from. In this flow mount() takes only token — there is no invoice here, the subscription session is addressed instead. methods narrows the server set of payment methods (the server order is kept; an empty intersection keeps the whole set and calls onError with code: 'method_unavailable'), webview marks the shop app WebView. The subscription SDK does not pass lang.

<div id="bind"></div>
<script src="https://subs-sandbox.digitalspb.com/Cards/Sbp/embed.js"></script>
<script>
  SbpWidget.mount('#bind', {
    token: '8c0c8870d6fb4ee8a995ae183a44b928',   // the AuthorizeUrl tail from CreateSubscription
    brand: { name: 'Warm Corner', primary: '#c2410c' },
    onSuccess: function () { location.href = '/subscribed'; },
    onExpired: function () {},
    onError:   function (e) {}
  });
</script>

⚠️ onSuccess means the initial step succeeded: the first-period payment with a binding for recurring charges or, when the first payment is deferred, an SBP binding without a charge. The browser event does not replace the server notifications; onExpired, onError and closing the widget do not prove that no money was taken.