HandlePaymentMethodRouteRequestEvent example

$setPaymentOrderRouteRequestEvent = new SetPaymentOrderRouteRequestEvent($request, $setPaymentRequest, $context);
        $this->eventDispatcher->dispatch($setPaymentOrderRouteRequestEvent);

        $this->setPaymentOrderRoute->setPayment($setPaymentOrderRouteRequestEvent->getStoreApiRequest(), $context);

        $handlePaymentRequest = new Request();
        $handlePaymentRequest->request->set('orderId', $orderId);
        $handlePaymentRequest->request->set('finishUrl', $finishUrl);
        $handlePaymentRequest->request->set('errorUrl', $errorUrl);
        $handlePaymentRequest->request->add($request->request->all());

        $handlePaymentMethodRouteRequestEvent = new HandlePaymentMethodRouteRequestEvent($request, $handlePaymentRequest, $context);
        $this->eventDispatcher->dispatch($handlePaymentMethodRouteRequestEvent);

        try {
            $routeResponse = $this->handlePaymentMethodRoute->load(
                $handlePaymentMethodRouteRequestEvent->getStoreApiRequest(),
                $context
            );
            $response = $routeResponse->getRedirectResponse();
        } catch (PaymentProcessException) {
            return $this->forwardToRoute(
                'frontend.checkout.finish.page',
                [