Checkout.hubuppayments.com

// Client-side check – not for security const urlParams = new URLSearchParams(window.location.search); const paymentIntent = urlParams.get('payment_intent'); if(paymentIntent) showConfirmation(); HubUp sends payment_intent.succeeded , payment_intent.failed , subscription.created , etc.

const crypto = require('crypto'); function verifyWebhookSignature(payload, signature, secret) const expected = crypto .createHmac('sha256', secret) .update(JSON.stringify(payload)) .digest('hex'); return crypto.timingSafeEqual(Buffer.from(signature), Buffer.from(expected)); checkout.hubuppayments.com

includes checkout_url for collecting payment method. // Client-side check – not for security const