Integrating UPI into a Laravel application

Laravel makes a tidy UPI integration easy.

1. Configuration

Store UPI_SECRET_KEY, UPI_SIGNING_SECRET and UPI_BASE_URL in .env and read them from config/services.php.

2. Creating an order

$res = Http::withToken(config('services.upi.key'))
    ->post(config('services.upi.url').'/api/v1/orders', [
        'amount' => $order->total, 'order_id' => $order->number,
        'redirect_url' => route('orders.thanks', $order),
    ])->json('data');
return redirect()->away($res['payment_url']);

3. The webhook route

Add the route to the CSRF exceptions, verify the signature, then dispatch a job. Make the job idempotent: if the order is already paid, return.

4. The thank-you page

Show the status from your database; if it is still pending, poll your own endpoint for a few seconds.