Payments

const response = await fetch('https://api.shoppex.io/dev/v1/payments', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    title: 'Pro License',
    email: '[email protected]',
    value: 49.99,
    currency: 'USD',
    webhook: 'https://your-site.com/api/shoppex/payment-webhook'
  })
});

const { data } = await response.json();
console.log(data.url); // https://checkout.shoppex.io/invoice/4ea04c92-5cc3-4ea8-845c-cd3c7085796c
console.log(data.webhook_secret); // returned once when webhook is provided

{
  "data": {
    "uniqid": "4ea04c92-5cc3-4ea8-845c-cd3c7085796c",
    "crypto_gateway": "TRON",
    "url": "https://checkout.shoppex.io/invoice/4ea04c92-5cc3-4ea8-845c-cd3c7085796c?selected_gateway=TRON&auto_start_gateway=1&auto_start_crypto=1",
    "url_branded": "https://checkout.shoppex.io/invoice/4ea04c92-5cc3-4ea8-845c-cd3c7085796c?selected_gateway=TRON&auto_start_gateway=1&auto_start_crypto=1&shop=12345"
  }
}

{
  "data": {
    "features": {
      "nativeCryptoCheckout": {
        "available": true,
        "enabled": true,
        "gateways": ["BITCOIN", "LITECOIN", "USDT_TRC20", "SOLANA", "USDT_SOL"]
      }
    }
  }
}

{
  "data": {
    "uniqid": "4ea04c92-5cc3-4ea8-845c-cd3c7085796c",
    "gateway": "NATIVE",
    "crypto_gateway": "LITECOIN",
    "crypto_address": "ltc1qexampleaddress",
    "crypto_amount": 0.42133742,
    "crypto_received": 0,
    "crypto_uri": "litecoin:ltc1qexampleaddress?amount=0.42133742",
    "crypto_confirmations_needed": 2,
    "status": "PENDING",
    "url": "https://checkout.shoppex.io/invoice/4ea04c92-5cc3-4ea8-845c-cd3c7085796c"
  }
}

import crypto from 'crypto';

function verifyWebhook(
  payload: string,
  signatureHeader: string,
  deliveryId: string,
  timestampHeader: string,
  secret: string,
): boolean {
  const segments = signatureHeader.split(',').map((part) => part.trim());
  const hasV1Marker = segments.includes('v1');
  const parts = Object.fromEntries(segments.filter((part) => part.includes('=')).map((part) => {
    const [key, value] = part.trim().split('=');
    return [key, value ?? ''];
  }));
  if (!deliveryId || !hasV1Marker || parts.t !== timestampHeader) {
    return false;
  }
  const timestamp = Number(parts.t);
  if (!Number.isFinite(timestamp)) return false;
  if (Math.abs(Math.floor(Date.now() / 1000) - timestamp) > 300) {
    return false;
  }
  if (!/^[0-9a-f]{64}$/i.test(parts.h ?? '')) return false;

  const expected = crypto
    .createHmac('sha256', secret)
    .update(`${deliveryId}.${parts.t}.${payload}`)
    .digest('hex');
  if (parts.h.length !== expected.length) return false;

  return crypto.timingSafeEqual(
    Buffer.from(parts.h, 'hex'),
    Buffer.from(expected, 'hex'),
  );
}

app.post('/webhooks/shoppex', async (req, res) => {
  // Verify signature (important!)
  const signature = req.headers['x-shoppex-signature-v2'] as string;
  const deliveryId = req.headers['x-shoppex-delivery'] as string;
  const timestamp = req.headers['x-shoppex-timestamp'] as string;
  if (!verifyWebhook(req.rawBody, signature, deliveryId, timestamp, WEBHOOK_SECRET)) {
    return res.status(401).send('Invalid signature');
  }

  const { event, data } = req.body;

  switch (event) {
    case 'order:paid':
      // Payment successful - fulfill the order
      await fulfillOrder(data.uniqid, data.customer_email);
      break;

    case 'order:cancelled':
      // Payment failed or expired
      await handleFailedPayment(data.uniqid);
      break;
  }

  res.status(200).send('OK');
});