Building an Events Ticketing Platform with Splits

// Sell a ticket with organizer split
app.post('/api/events/:id/tickets', async (req, res) => {
  var { ticketType, email, quantity } = req.body;
  var event = await db.events.findById(req.params.id);
  var organizer = await db.organizers.findById(event.organizer_id);

  var ticketPrice = event.ticket_prices[ticketType]; // e.g., 5000 NGN
  var totalAmount = ticketPrice * quantity;
  var platformFee = 500; // NGN 500 per order flat booking fee
  var organizerShare = totalAmount - platformFee;

  var reference = 'tkt_' + event.id + '_' + Date.now();

  var response = await fetch('https://api.paystack.co/transaction/initialize', {
    method: 'POST',
    headers: { Authorization: 'Bearer ' + process.env.PAYSTACK_SECRET_KEY, 'Content-Type': 'application/json' },
    body: JSON.stringify({
      email,
      amount: totalAmount * 100,
      subaccount: organizer.subaccount_code,
      transaction_charge: platformFee * 100, // Platform booking fee in kobo
      bearer: 'account',
      reference,
      metadata: {
        event_id: event.id,
        ticket_type: ticketType,
        quantity,
      },
    }),
  });

  var data = await response.json();
  res.json({ authorization_url: data.data.authorization_url });
});

// Webhook: generate and send tickets on payment
if (event.event === 'charge.success') {
  var meta = event.data.metadata;
  if (meta?.event_id) {
    var tickets = await generateTickets(meta.event_id, meta.ticket_type, meta.quantity);
    await sendTicketEmail(event.data.customer.email, tickets);
    await db.sales.create({
      reference: event.data.reference,
      event_id: meta.event_id,
      email: event.data.customer.email,
      ticket_type: meta.ticket_type,
      quantity: meta.quantity,
      status: 'paid',
    });
  }
}

This guide is part of the Paystack split payments guide.

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