/// <summary>
        /// Gets shopping cart total
        /// </summary>
        /// <param name="cart">Cart</param>
        /// <param name="appliedGiftCards">Applied gift cards</param>
        /// <param name="discountAmount">Applied discount amount</param>
        /// <param name="appliedDiscount">Applied discount</param>
        /// <param name="redeemedRewardPoints">Reward points to redeem</param>
        /// <param name="redeemedRewardPointsAmount">Reward points amount in primary store currency to redeem</param>
        /// <param name="ignoreRewardPonts">A value indicating whether we should ignore reward points (if enabled and a customer is going to use them)</param>
        /// <param name="usePaymentMethodAdditionalFee">A value indicating whether we should use payment method additional fee when calculating order total</param>
        /// <returns>Shopping cart total;Null if shopping cart total couldn't be calculated now</returns>
        public virtual decimal?GetShoppingCartTotal(IList <ShoppingCartItem> cart,
                                                    out decimal discountAmount, out Discount appliedDiscount,
                                                    out List <AppliedGiftCard> appliedGiftCards,
                                                    out int redeemedRewardPoints, out decimal redeemedRewardPointsAmount,
                                                    bool ignoreRewardPonts = false, bool usePaymentMethodAdditionalFee = true)
        {
            redeemedRewardPoints       = 0;
            redeemedRewardPointsAmount = decimal.Zero;

            var    customer = cart.GetCustomer();
            string paymentMethodSystemName = "";

            if (customer != null)
            {
                paymentMethodSystemName = customer.GetAttribute <string>(
                    SystemCustomerAttributeNames.SelectedPaymentMethod,
                    _genericAttributeService,
                    _storeContext.CurrentStore.Id);
            }


            //subtotal without tax
            decimal  orderSubTotalDiscountAmount;
            Discount orderSubTotalAppliedDiscount;
            decimal  subTotalWithoutDiscountBase;
            decimal  subTotalWithDiscountBase;

            GetShoppingCartSubTotal(cart, false,
                                    out orderSubTotalDiscountAmount, out orderSubTotalAppliedDiscount,
                                    out subTotalWithoutDiscountBase, out subTotalWithDiscountBase);
            //subtotal with discount
            decimal subtotalBase = subTotalWithDiscountBase;



            //shipping without tax
            decimal?shoppingCartShipping = GetShoppingCartShippingTotal(cart, false);



            //payment method additional fee without tax
            decimal paymentMethodAdditionalFeeWithoutTax = decimal.Zero;

            if (usePaymentMethodAdditionalFee && !String.IsNullOrEmpty(paymentMethodSystemName))
            {
                decimal paymentMethodAdditionalFee = _paymentService.GetAdditionalHandlingFee(cart,
                                                                                              paymentMethodSystemName);
                paymentMethodAdditionalFeeWithoutTax =
                    _taxService.GetPaymentMethodAdditionalFee(paymentMethodAdditionalFee,
                                                              false, customer);
            }



            //tax
            decimal shoppingCartTax = GetTaxTotal(cart, usePaymentMethodAdditionalFee);



            //order total
            decimal resultTemp = decimal.Zero;

            resultTemp += subtotalBase;
            if (shoppingCartShipping.HasValue)
            {
                resultTemp += shoppingCartShipping.Value;
            }
            resultTemp += paymentMethodAdditionalFeeWithoutTax;
            resultTemp += shoppingCartTax;
            if (_shoppingCartSettings.RoundPricesDuringCalculation)
            {
                resultTemp = RoundingHelper.RoundPrice(resultTemp);
            }

            #region Order total discount

            discountAmount = GetOrderTotalDiscount(customer, resultTemp, out appliedDiscount);

            //sub totals with discount
            if (resultTemp < discountAmount)
            {
                discountAmount = resultTemp;
            }

            //reduce subtotal
            resultTemp -= discountAmount;

            if (resultTemp < decimal.Zero)
            {
                resultTemp = decimal.Zero;
            }
            if (_shoppingCartSettings.RoundPricesDuringCalculation)
            {
                resultTemp = RoundingHelper.RoundPrice(resultTemp);
            }

            #endregion

            #region Applied gift cards

            //let's apply gift cards now (gift cards that can be used)
            appliedGiftCards = new List <AppliedGiftCard>();
            if (!cart.IsRecurring())
            {
                //we don't apply gift cards for recurring products
                var giftCards = _giftCardService.GetActiveGiftCardsAppliedByCustomer(customer);
                if (giftCards != null)
                {
                    foreach (var gc in giftCards)
                    {
                        if (resultTemp > decimal.Zero)
                        {
                            decimal remainingAmount = gc.GetGiftCardRemainingAmount();
                            decimal amountCanBeUsed = decimal.Zero;
                            if (resultTemp > remainingAmount)
                            {
                                amountCanBeUsed = remainingAmount;
                            }
                            else
                            {
                                amountCanBeUsed = resultTemp;
                            }

                            //reduce subtotal
                            resultTemp -= amountCanBeUsed;

                            var appliedGiftCard = new AppliedGiftCard();
                            appliedGiftCard.GiftCard        = gc;
                            appliedGiftCard.AmountCanBeUsed = amountCanBeUsed;
                            appliedGiftCards.Add(appliedGiftCard);
                        }
                    }
                }
            }

            #endregion

            if (resultTemp < decimal.Zero)
            {
                resultTemp = decimal.Zero;
            }
            if (_shoppingCartSettings.RoundPricesDuringCalculation)
            {
                resultTemp = RoundingHelper.RoundPrice(resultTemp);
            }

            if (!shoppingCartShipping.HasValue)
            {
                //we have errors
                return(null);
            }

            decimal orderTotal = resultTemp;

            #region Reward points

            if (_rewardPointsSettings.Enabled &&
                !ignoreRewardPonts &&
                customer.GetAttribute <bool>(SystemCustomerAttributeNames.UseRewardPointsDuringCheckout,
                                             _genericAttributeService, _storeContext.CurrentStore.Id))
            {
                int rewardPointsBalance = customer.GetRewardPointsBalance();
                if (CheckMinimumRewardPointsToUseRequirement(rewardPointsBalance))
                {
                    decimal rewardPointsBalanceAmount = ConvertRewardPointsToAmount(rewardPointsBalance);
                    if (orderTotal > decimal.Zero)
                    {
                        if (orderTotal > rewardPointsBalanceAmount)
                        {
                            redeemedRewardPoints       = rewardPointsBalance;
                            redeemedRewardPointsAmount = rewardPointsBalanceAmount;
                        }
                        else
                        {
                            redeemedRewardPointsAmount = orderTotal;
                            redeemedRewardPoints       = ConvertAmountToRewardPoints(redeemedRewardPointsAmount);
                        }
                    }
                }
            }

            #endregion

            orderTotal = orderTotal - redeemedRewardPointsAmount;
            if (_shoppingCartSettings.RoundPricesDuringCalculation)
            {
                orderTotal = RoundingHelper.RoundPrice(orderTotal);
            }
            return(orderTotal);
        }
Example #2
0
        public SetExpressCheckoutResponseType SetExpressCheckout(PayPalProcessPaymentRequest processPaymentRequest, IList <OrganizedShoppingCartItem> cart)
        {
            var result         = new SetExpressCheckoutResponseType();
            var store          = Services.StoreService.GetStoreById(processPaymentRequest.StoreId);
            var customer       = Services.WorkContext.CurrentCustomer;
            var settings       = Services.Settings.LoadSetting <PayPalExpressPaymentSettings>(processPaymentRequest.StoreId);
            var payPalCurrency = GetApiCurrency(store.PrimaryStoreCurrency);
            var excludingTax   = (Services.WorkContext.GetTaxDisplayTypeFor(customer, store.Id) == TaxDisplayType.ExcludingTax);

            var req = new SetExpressCheckoutReq
            {
                SetExpressCheckoutRequest = new SetExpressCheckoutRequestType
                {
                    Version = ApiVersion,
                    SetExpressCheckoutRequestDetails = new SetExpressCheckoutRequestDetailsType()
                }
            };

            var details = new SetExpressCheckoutRequestDetailsType
            {
                PaymentAction          = GetPaymentAction(settings),
                PaymentActionSpecified = true,
                CancelURL = Services.WebHelper.GetStoreLocation(store.SslEnabled) + "cart",
                ReturnURL = Services.WebHelper.GetStoreLocation(store.SslEnabled) + "Plugins/SmartStore.PayPal/PayPalExpress/GetDetails",
                //CallbackURL = _webHelper.GetStoreLocation(currentStore.SslEnabled) + "Plugins/SmartStore.PayPal/PayPalExpress/ShippingOptions?CustomerID=" + _workContext.CurrentCustomer.Id.ToString(),
                //CallbackTimeout = _payPalExpressPaymentSettings.CallbackTimeout.ToString()
                ReqConfirmShipping = settings.ConfirmedShipment.ToString(),
                NoShipping         = settings.NoShipmentAddress.ToString()
            };

            // populate cart
            var taxRate          = decimal.Zero;
            var unitPriceTaxRate = decimal.Zero;
            var itemTotal        = decimal.Zero;
            var cartItems        = new List <PaymentDetailsItemType>();

            foreach (var item in cart)
            {
                var product   = item.Item.Product;
                var unitPrice = _priceCalculationService.GetUnitPrice(item, true);
                var shoppingCartUnitPriceWithDiscount = excludingTax
                    ? _taxService.GetProductPrice(product, unitPrice, false, customer, out taxRate)
                    : _taxService.GetProductPrice(product, unitPrice, true, customer, out unitPriceTaxRate);

                cartItems.Add(new PaymentDetailsItemType
                {
                    Name     = product.Name,
                    Number   = product.Sku,
                    Quantity = item.Item.Quantity.ToString(),
                    // this is the per item cost
                    Amount = new BasicAmountType
                    {
                        currencyID = payPalCurrency,
                        Value      = shoppingCartUnitPriceWithDiscount.FormatInvariant()
                    }
                });

                itemTotal += (item.Item.Quantity * shoppingCartUnitPriceWithDiscount);
            }
            ;

            // additional handling fee
            var additionalHandlingFee = GetAdditionalHandlingFee(cart);

            cartItems.Add(new PaymentDetailsItemType
            {
                Name     = T("Plugins.Payments.PayPal.PaymentMethodFee").Text,
                Quantity = "1",
                Amount   = new BasicAmountType()
                {
                    currencyID = payPalCurrency,
                    Value      = additionalHandlingFee.FormatInvariant()
                }
            });

            itemTotal += GetAdditionalHandlingFee(cart);

            //shipping
            var shippingTotal = decimal.Zero;

            if (cart.RequiresShipping())
            {
                decimal?shoppingCartShippingBase = OrderTotalCalculationService.GetShoppingCartShippingTotal(cart);
                if (shoppingCartShippingBase.HasValue && shoppingCartShippingBase > 0)
                {
                    shippingTotal = _currencyService.ConvertFromPrimaryStoreCurrency(shoppingCartShippingBase.Value, Services.WorkContext.WorkingCurrency);
                }
                else
                {
                    shippingTotal = settings.DefaultShippingPrice;
                }
            }

            //This is the default if the Shipping Callback fails
            //var shippingOptions = new List<ShippingOptionType>();
            //shippingOptions.Add(new ShippingOptionType()
            //{
            //    ShippingOptionIsDefault = "true",
            //    ShippingOptionName = "Standard Shipping",
            //    ShippingOptionAmount = new BasicAmountType()
            //    {
            //        Value = shippingTotal.ToString(), //This is the default value used for shipping if the Instant Update API returns an error or does not answer within the callback time
            //        currencyID = PaypalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId))
            //    }
            //});
            //details.FlatRateShippingOptions = shippingOptions.ToArray();
            //details.TotalType = TotalType.EstimatedTotal;

            // get total tax
            //SortedDictionary<decimal, decimal> taxRates = null;
            //decimal shoppingCartTaxBase = OrderTotalCalculationService.GetTaxTotal(cart, out taxRates);
            //decimal shoppingCartTax = _currencyService.ConvertFromPrimaryStoreCurrency(shoppingCartTaxBase, CommonServices.WorkContext.WorkingCurrency);

            // discount
            var discount = -processPaymentRequest.Discount;

            if (discount != 0)
            {
                cartItems.Add(new PaymentDetailsItemType
                {
                    Name     = T("Plugins.Payments.PayPal.ThreadrockDiscount").Text,
                    Quantity = "1",
                    Amount   = new BasicAmountType // this is the total discount
                    {
                        currencyID = payPalCurrency,
                        Value      = discount.FormatInvariant()
                    }
                });

                itemTotal += discount;
            }

            if (!cart.IsRecurring())
            {
                //we don't apply gift cards for recurring products
                var giftCards = _giftCardService.GetActiveGiftCardsAppliedByCustomer(customer, Services.StoreContext.CurrentStore.Id);
                if (giftCards != null)
                {
                    foreach (var gc in giftCards)
                    {
                        if (itemTotal > decimal.Zero)
                        {
                            decimal remainingAmount = gc.GetGiftCardRemainingAmount();
                            decimal amountCanBeUsed = decimal.Zero;
                            if (itemTotal > remainingAmount)
                            {
                                amountCanBeUsed = remainingAmount;
                            }
                            else
                            {
                                amountCanBeUsed = itemTotal - .01M;
                            }

                            decimal amountToSubtract = -amountCanBeUsed;

                            cartItems.Add(new PaymentDetailsItemType
                            {
                                Name     = T("Plugins.Payments.PayPal.GiftcardApplied").Text,
                                Quantity = "1",
                                Amount   = new BasicAmountType
                                {
                                    currencyID = payPalCurrency,
                                    Value      = amountToSubtract.FormatInvariant()
                                }
                            });

                            //reduce subtotal
                            itemTotal += amountToSubtract;
                        }
                    }
                }
            }

            // populate payment details
            var paymentDetails = new PaymentDetailsType
            {
                ItemTotal = new BasicAmountType
                {
                    Value      = Math.Round(itemTotal, 2).FormatInvariant(),
                    currencyID = payPalCurrency
                },
                ShippingTotal = new BasicAmountType
                {
                    Value      = Math.Round(shippingTotal, 2).FormatInvariant(),
                    currencyID = payPalCurrency
                },
                //TaxTotal = new BasicAmountType
                //{
                //    Value = Math.Round(shoppingCartTax, 2).ToString("N", new CultureInfo("en-us")),
                //    currencyID = PayPalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId))
                //},
                OrderTotal = new BasicAmountType
                {
                    Value      = Math.Round(itemTotal + shippingTotal, 2).FormatInvariant(),
                    currencyID = payPalCurrency
                },
                Custom             = processPaymentRequest.OrderGuid.ToString(),
                ButtonSource       = SmartStoreVersion.CurrentFullVersion,
                PaymentAction      = GetPaymentAction(settings),
                PaymentDetailsItem = cartItems.ToArray()
            };

            details.PaymentDetails = new[] { paymentDetails };

            details.ShippingMethodSpecified = true;

            req.SetExpressCheckoutRequest.SetExpressCheckoutRequestDetails.Custom = processPaymentRequest.OrderGuid.ToString();
            req.SetExpressCheckoutRequest.SetExpressCheckoutRequestDetails        = details;

            using (var service = GetApiAaService(settings))
            {
                result = service.SetExpressCheckout(req);
            }

            var checkoutState = _httpContext.GetCheckoutState();

            if (checkoutState.CustomProperties.ContainsKey("PayPalExpressButtonUsed"))
            {
                checkoutState.CustomProperties["PayPalExpressButtonUsed"] = true;
            }
            else
            {
                checkoutState.CustomProperties.Add("PayPalExpressButtonUsed", true);
            }

            return(result);
        }
        public SetExpressCheckoutResponseType SetExpressCheckout(PayPalProcessPaymentRequest processPaymentRequest,
                                                                 IList <Core.Domain.Orders.OrganizedShoppingCartItem> cart)
        {
            var result       = new SetExpressCheckoutResponseType();
            var currentStore = CommonServices.StoreContext.CurrentStore;

            var req = new SetExpressCheckoutReq
            {
                SetExpressCheckoutRequest = new SetExpressCheckoutRequestType
                {
                    Version = PayPalHelper.GetApiVersion(),
                    SetExpressCheckoutRequestDetails = new SetExpressCheckoutRequestDetailsType()
                }
            };

            var details = new SetExpressCheckoutRequestDetailsType
            {
                PaymentAction          = PayPalHelper.GetPaymentAction(Settings),
                PaymentActionSpecified = true,
                CancelURL = CommonServices.WebHelper.GetStoreLocation(currentStore.SslEnabled) + "cart",
                ReturnURL = CommonServices.WebHelper.GetStoreLocation(currentStore.SslEnabled) + "Plugins/SmartStore.PayPal/PayPalExpress/GetDetails",
                //CallbackURL = _webHelper.GetStoreLocation(currentStore.SslEnabled) + "Plugins/SmartStore.PayPal/PayPalExpress/ShippingOptions?CustomerID=" + _workContext.CurrentCustomer.Id.ToString(),
                //CallbackTimeout = _payPalExpressPaymentSettings.CallbackTimeout.ToString()
                ReqConfirmShipping = Settings.ConfirmedShipment.ToString(),
                NoShipping         = Settings.NoShipmentAddress.ToString()
            };

            // populate cart
            decimal itemTotal = decimal.Zero;
            var     cartItems = new List <PaymentDetailsItemType>();

            foreach (OrganizedShoppingCartItem item in cart)
            {
                decimal shoppingCartUnitPriceWithDiscountBase = _priceCalculationService.GetUnitPrice(item, true);
                decimal shoppingCartUnitPriceWithDiscount     = _currencyService.ConvertFromPrimaryStoreCurrency(shoppingCartUnitPriceWithDiscountBase, CommonServices.WorkContext.WorkingCurrency);
                decimal priceIncludingTier = shoppingCartUnitPriceWithDiscount;
                cartItems.Add(new PaymentDetailsItemType()
                {
                    Name     = item.Item.Product.Name,
                    Number   = item.Item.Product.Sku,
                    Quantity = item.Item.Quantity.ToString(),
                    Amount   = new BasicAmountType() // this is the per item cost
                    {
                        currencyID = PayPalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId)),
                        Value      = (priceIncludingTier).ToString("N", new CultureInfo("en-us"))
                    }
                });
                itemTotal += (item.Item.Quantity * priceIncludingTier);
            }
            ;

            decimal shippingTotal = decimal.Zero;

            if (cart.RequiresShipping())
            {
                decimal?shoppingCartShippingBase = OrderTotalCalculationService.GetShoppingCartShippingTotal(cart);
                if (shoppingCartShippingBase.HasValue && shoppingCartShippingBase > 0)
                {
                    shippingTotal = _currencyService.ConvertFromPrimaryStoreCurrency(shoppingCartShippingBase.Value, CommonServices.WorkContext.WorkingCurrency);
                }
                else
                {
                    shippingTotal = Settings.DefaultShippingPrice;
                }
            }

            //This is the default if the Shipping Callback fails
            //var shippingOptions = new List<ShippingOptionType>();
            //shippingOptions.Add(new ShippingOptionType()
            //{
            //    ShippingOptionIsDefault = "true",
            //    ShippingOptionName = "Standard Shipping",
            //    ShippingOptionAmount = new BasicAmountType()
            //    {
            //        Value = shippingTotal.ToString(), //This is the default value used for shipping if the Instant Update API returns an error or does not answer within the callback time
            //        currencyID = PaypalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId))
            //    }
            //});
            //details.FlatRateShippingOptions = shippingOptions.ToArray();
            //details.TotalType = TotalType.EstimatedTotal;

            // get total tax
            SortedDictionary <decimal, decimal> taxRates = null;
            decimal shoppingCartTaxBase = OrderTotalCalculationService.GetTaxTotal(cart, out taxRates);
            decimal shoppingCartTax     = _currencyService.ConvertFromPrimaryStoreCurrency(shoppingCartTaxBase, CommonServices.WorkContext.WorkingCurrency);
            decimal discount            = -processPaymentRequest.Discount;


            // Add discounts to PayPal order
            if (discount != 0)
            {
                cartItems.Add(new PaymentDetailsItemType()
                {
                    Name     = "Threadrock Discount",
                    Quantity = "1",
                    Amount   = new BasicAmountType() // this is the total discount
                    {
                        currencyID = PayPalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId)),
                        Value      = discount.ToString("N", new CultureInfo("en-us"))
                    }
                });

                itemTotal += discount;
            }

            // get customer
            int customerId = Convert.ToInt32(CommonServices.WorkContext.CurrentCustomer.Id.ToString());
            var customer   = _customerService.GetCustomerById(customerId);

            if (!cart.IsRecurring())
            {
                //we don't apply gift cards for recurring products
                var giftCards = _giftCardService.GetActiveGiftCardsAppliedByCustomer(customer);
                if (giftCards != null)
                {
                    foreach (var gc in giftCards)
                    {
                        if (itemTotal > decimal.Zero)
                        {
                            decimal remainingAmount = gc.GetGiftCardRemainingAmount();
                            decimal amountCanBeUsed = decimal.Zero;
                            if (itemTotal > remainingAmount)
                            {
                                amountCanBeUsed = remainingAmount;
                            }
                            else
                            {
                                amountCanBeUsed = itemTotal - .01M;
                            }

                            decimal amountToSubtract = -amountCanBeUsed;

                            cartItems.Add(new PaymentDetailsItemType()
                            {
                                Name     = "Giftcard Applied",
                                Quantity = "1",
                                Amount   = new BasicAmountType()
                                {
                                    currencyID = PayPalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId)),
                                    Value      = amountToSubtract.ToString("N", new CultureInfo("en-us"))
                                }
                            });

                            //reduce subtotal
                            itemTotal += amountToSubtract;
                        }
                    }
                }
            }

            // populate payment details
            var paymentDetails = new PaymentDetailsType
            {
                ItemTotal = new BasicAmountType
                {
                    Value      = Math.Round(itemTotal, 2).ToString("N", new CultureInfo("en-us")),
                    currencyID = PayPalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId))
                },
                ShippingTotal = new BasicAmountType
                {
                    Value      = Math.Round(shippingTotal, 2).ToString("N", new CultureInfo("en-us")),
                    currencyID = PayPalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId))
                },
                TaxTotal = new BasicAmountType
                {
                    Value      = Math.Round(shoppingCartTax, 2).ToString("N", new CultureInfo("en-us")),
                    currencyID = PayPalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId))
                },
                OrderTotal = new BasicAmountType
                {
                    Value      = Math.Round(itemTotal + shoppingCartTax + shippingTotal, 2).ToString("N", new CultureInfo("en-us")),
                    currencyID = PayPalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId))
                },
                Custom             = processPaymentRequest.OrderGuid.ToString(),
                ButtonSource       = SmartStoreVersion.CurrentFullVersion,
                PaymentAction      = PayPalHelper.GetPaymentAction(Settings),
                PaymentDetailsItem = cartItems.ToArray()
            };

            details.PaymentDetails = new[] { paymentDetails };
            //details.MaxAmount = new BasicAmountType()  // this is the per item cost
            //{
            //    currencyID = PaypalHelper.GetPaypalCurrency(_currencyService.GetCurrencyById(_currencySettings.PrimaryStoreCurrencyId)),
            //    Value = (decimal.Parse(paymentDetails.OrderTotal.Value) + 30).ToString()
            //};

            details.ShippingMethodSpecified = true;

            req.SetExpressCheckoutRequest.SetExpressCheckoutRequestDetails.Custom = processPaymentRequest.OrderGuid.ToString();
            req.SetExpressCheckoutRequest.SetExpressCheckoutRequestDetails        = details;

            using (var service = new PayPalAPIAASoapBinding())
            {
                service.Url = PayPalHelper.GetPaypalServiceUrl(Settings);
                service.RequesterCredentials = PayPalHelper.GetPaypalApiCredentials(Settings);
                result = service.SetExpressCheckout(req);
            }

            _httpContext.GetCheckoutState().CustomProperties.Add("PayPalExpressButtonUsed", true);

            return(result);
        }