public async Task CreatePayment()

in src/Modules/SimplCommerce.Module.PaymentPaypalExpress/Areas/PaymentPaypalExpress/Controllers/PaypalExpressController.cs [56:115]
56 lines of code
3 McCabe index (conditional complexity)

        public async Task<ActionResult> CreatePayment()
        {
            var hostingDomain = Request.Host.Value;
            var accessToken = await GetAccessToken();
            var currentUser = await _workContext.GetCurrentUser();
            var cart = await _cartService.GetActiveCartDetails(currentUser.Id);
            if(cart == null)
            {
                return NotFound();
            }

            var regionInfo = new RegionInfo(_currencyService.CurrencyCulture.LCID);
            var experienceProfileId = await CreateExperienceProfile(accessToken);

            var httpClient = _httpClientFactory.CreateClient();
            httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
            var paypalAcceptedNumericFormatCulture = CultureInfo.CreateSpecificCulture("en-US");
            var paymentCreateRequest = new PaymentCreateRequest
            {
                experience_profile_id = experienceProfileId,
                intent = "sale",
                payer = new Payer
                {
                    payment_method = "paypal"
                },
                transactions = new Transaction[]
                {
                    new Transaction {
                        amount = new Amount
                        {
                            total = (cart.OrderTotal + CalculatePaymentFee(cart.OrderTotal)).ToString("N2", paypalAcceptedNumericFormatCulture),
                            currency = regionInfo.ISOCurrencySymbol,
                            details = new Details
                            {
                                handling_fee = CalculatePaymentFee(cart.OrderTotal).ToString("N2", paypalAcceptedNumericFormatCulture),
                                subtotal = cart.SubTotalWithDiscountWithoutTax.ToString("N2", paypalAcceptedNumericFormatCulture),
                                tax = cart.TaxAmount?.ToString("N2", paypalAcceptedNumericFormatCulture) ?? "0",
                                shipping = cart.ShippingAmount?.ToString("N2", paypalAcceptedNumericFormatCulture) ?? "0"
                            }
                        }
                    }
                },
                redirect_urls = new Redirect_Urls
                {
                    cancel_url = $"http://{hostingDomain}/PaypalExpress/Cancel", //Haven't seen it being used anywhere
                    return_url = $"http://{hostingDomain}/PaypalExpress/Success", //Haven't seen it being used anywhere
                }
            };

            var response = await httpClient.PostJsonAsync($"https://api{_setting.Value.EnvironmentUrlPart}.paypal.com/v1/payments/payment", paymentCreateRequest);
            var responseBody = await response.Content.ReadAsStringAsync();
            dynamic payment = JObject.Parse(responseBody);
            if (response.IsSuccessStatusCode)
            {
                string paymentId = payment.id;
                return Ok(new { PaymentId = paymentId });
            }

            return BadRequest(responseBody);
        }