Checkout.hubuppayments.com Work -

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));

// 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. checkout.hubuppayments.com

Authorization: Bearer secret_key Content-Type: application/json const crypto = require('crypto')

"plan_id": "plan_monthly_10", "customer_email": "user@example.com", "trial_days": 14, "success_url": "https://yoursite.com/subscribe/success", "cancel_url": "https://yoursite.com/subscribe/cancel" secret) const expected = crypto .createHmac('sha256'