Installment Payments for
Games and Digital Goods

// 1. Authenticate
const auth = await fetch('https://api2.merso.io/auth', {
  method: 'POST',
  body: JSON.stringify({
    game_id: process.env.MERSO_GAME_ID,
    api_key: process.env.MERSO_API_KEY
  })
});
const { token } = (await auth.json()).authResult;

// 2. Initiate PNPL purchase
const purchase = await fetch(
  'https://api2.merso.io/merso-buy-item', {
  method: 'POST',
  headers: { 'Authorization': `Bearer ${token}` },
  body: JSON.stringify({
    itemPrice: 29.99,
    itemId: `GAME-${Date.now()}-${Math.random()}`,
    itemName: 'Premium Hero Pack',
    playerEmail: player.email,
    paymentMode: 'INSTALLMENTS'
  })
});
const { clientSecret } = await purchase.json();

// 3. Webhook: grant access on payment.succeeded
app.post('/webhook', (req, res) => {
  if (req.body.type === 'payment.succeeded')
    grantItem(req.body.paymentIntentId);
});