message: [Cross Sells] Add missing post purchase attributes
diff: @@ -55,6 +55,9 @@ interface Storage {
  interface Purchase {
  /** Initial purchase's unique identifier */
  referenceId: string;
  + customerId?: string;
  + destinationCountryCode?: string;
  + totalPriceSet: MoneyBag;
  /** Items being purchased */
  lineItems: LineItem[];
  }
  @@ -72,6 +75,7 @@ interface LineItem {
  /** Product being purchased */
  product: Product;
  quantity: number;
  + totalPriceSet: MoneyBag;
  }
  interface Product {
  