addAffiliateTracking example

#[Route(path: '/store-api/checkout/order', name: 'store-api.checkout.cart.order', methods: ['POST'], defaults: ['_loginRequired' => true, '_loginRequiredAllowGuest' => true])]     public function order(Cart $cart, SalesChannelContext $context, RequestDataBag $data): CartOrderRouteResponse
    {
        // we use this state in stock updater class, to prevent duplicate available stock updates         $context->addState('checkout-order-route');

        $calculatedCart = $this->cartCalculator->calculate($cart, $context);
        $this->taxProviderProcessor->process($calculatedCart, $context);

        $this->addCustomerComment($calculatedCart, $data);
        $this->addAffiliateTracking($calculatedCart, $data);

        $preOrderPayment = Profiler::trace('checkout-order::pre-payment', fn () => $this->preparedPaymentService->handlePreOrderPayment($calculatedCart, $data, $context));

        $orderId = Profiler::trace('checkout-order::order-persist', fn () => $this->orderPersister->persist($calculatedCart, $context));

        $criteria = new Criteria([$orderId]);
        $criteria->setTitle('order-route::order-loading');
        $criteria
            ->addAssociation('orderCustomer.customer')
            ->addAssociation('orderCustomer.salutation')
            ->addAssociation('deliveries.shippingMethod')
            

return $this->renderStorefront('@Storefront/storefront/page/checkout/finish/index.html.twig', ['page' => $page]);
    }

    #[Route(path: '/checkout/order', name: 'frontend.checkout.finish.order', options: ['seo' => false], methods: ['POST'])]     public function order(RequestDataBag $data, SalesChannelContext $context, Request $request): Response
    {
        if (!$context->getCustomer()) {
            return $this->redirectToRoute('frontend.checkout.register.page');
        }

        try {
            $this->addAffiliateTracking($data, $request->getSession());

            $orderId = Profiler::trace('checkout-order', fn () => $this->orderService->createOrder($data, $context));
        } catch (ConstraintViolationException $formViolations) {
            return $this->forwardToRoute('frontend.checkout.confirm.page', ['formViolations' => $formViolations]);
        } catch (InvalidCartException|Error|EmptyCartException) {
            $this->addCartErrors(
                $this->cartService->getCart($context->getToken(), $context)
            );

            return $this->forwardToRoute('frontend.checkout.confirm.page');
        } catch (UnknownPaymentMethodException|CartException $e) {