// common header
let header = TPOSRequestHeader(clientID: "Your client's Tillhub account ID",
                               actionPath: TPOSRequestActionPath.checkout,
                               payloadType: TPOSRequestPayloadType.cart,
                               callbackUrlScheme: "Your Url scheme",
                               autoReturn: true, // Tillhub will automatically return to your application
                               comment: "Testing a checkout with cart details")

// Minimal cart item example
let cartItem1 = try TPOSCartItem(productId: "A Tillhub product ID",
                                 currency: "EUR",
                                 pricePerUnit: 99.95,
                                 vatRate: 0.19)

// Extended cart item example
let discount = try TPOSCartItemDiscount(type: TPOSCartItemDiscountType.relative,
                                        value: 0.15,
                                        comment: "A 15% discount.") 
                                                
let cartItem2 = try TPOSCartItem(type: TPOSCartItemType.item,
                                 quantity: 2.0,
                                 productId: "A Tillhub product ID",
                                 currency: "EUR",
                                 pricePerUnit: 99.95,
                                 vatRate: 0.19,
                                 title: "Another test product",
                                 comment: "Yet another fancy product",
                                 salesPerson: TPOSStaff(name: "Hubert Cumberdale", customId: "0089"),
                                 discounts: [discount])
        
// set up the cart
let paymentIntent = TPOSPaymentIntent(allowedTypes: [TKPOSPaymentType.cash],
                                      automaticType: TKPOSPaymentAutomaticType.automaticCash)

let cart = try TPOSCart(taxType: TPOSTaxType.inclusive,
                        items: [cartItem1, cartItem2],
                        paymentIntent: paymentIntent,
                        customId: "My custom reference",
                        title: "My test cart's title",
                        comment: "My test cart's comment",
                        customer: TPOSCustomer(name: "Marjory Stewart Baxter", customId: "000432001"),
                        cashier: TPOSStaff(name: "Jeremy Fisher", customId: "c_sdj_234"))
                        
// create the request
let cartRequest = TPOSRequest(header: header, payload: cart)

// perform request
TPOS.perform(request: cartRequest) { (error) in
    if let error = error { 
    	print("An error occured: \(error.localizedDescription)") 
    }
	...
}

// common header
let header = TPOSRequestHeader(clientID: "Your client's Tillhub account ID",
                               actionPath: TPOSRequestActionPath.load,
                               payloadType: TPOSRequestPayloadType.cartReference,
                               callbackUrlScheme: "Your Url scheme",
                               autoReturn: true, // Tillhub will automatically return to your application
                               comment: "Testing a checkout with a cart reference")

        
// set up cart reference
let cartReference = try TPOSCartReference(cartId: "A Tillhub cart ID")
                        
// create the request
let cartReferenceRequest = TPOSRequest(header: header, payload: cartReference)

// perform request
TPOS.perform(request: cartReferenceRequest) { (error) in
    if let error = error { 
    	print("An error occured: \(error.localizedDescription)") 
    }
	...
}

func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
	let response = try TPOSResponse(url: url)
	switch response.header.status {
	case .success:
		print("success, response: \(response)")
	case .failure:
		print("failure, error: \(response.header.localizedErrorDescription ?? "- no reason given -")")
	}
}