iOS Swift app calls the SquarePOS app on iPad -Square app's screen displays briefly then reverts to my screen's calling view controller-did nothing - square-connect

Question

This app is intentionally tiny - the UI is just a button to initiate the api call. The appDelegate simply shows a console log proving the callback was executed. I did this because I can not get the Square payment system to work even thought the code and url setup etc looks right to me. I am wondering if I misunderstand something in the documentation.
My app ID is: sq0idp-TbgQGqSrC84qkfcXSTntNg
bundleID is: com.craig.POSSDKTest2
My info.plist setup is a screenshot:info.plist and URLScheme setup
My code in the api calling VC:
// ViewController.swift
// POSSDKTest2
//
// Created by Dr Craig E Curphey on 2022-06-14.
//
import UIKit
import SquarePointOfSaleSDK
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}//------------------------------------
#IBAction func doPaymentTapped(_ sender: Any) {
//------ API to Square right here ******-----------------
let callbackURL = URL(string: "POSSDKTest2Scheme://")!
SCCAPIRequest.setApplicationID("sq0idp-TbgQGqSrC84qkfcXSTntNg")
var money: SCCMoney?
do {
// Specify the amount of money to charge - $1.00
let todaysFeePennies = 100
money = try SCCMoney(amountCents: todaysFeePennies, currencyCode: "CAD")
} catch {
print("money conversion failed.")
}
let LoginID = "TestPatient"
//log values used to console:
print("Initiating payment api request")
print("callback: \(callbackURL)")
print("money: \(money!)")
print("LoginID: TestPatient")
print("Creating payment api request")
do
{
let apiRequest =
try SCCAPIRequest(
callbackURL: callbackURL,
amount: money!,
userInfoString: LoginID,
locationID: "",
notes: "TestingSDK2",
customerID: "tester2",
supportedTenderTypes: .all,
clearsDefaultFees: false,
returnsAutomaticallyAfterPayment: false,
disablesKeyedInCardEntry: false,
skipsReceipt: false
)
print("api initiating!")
try SCCAPIConnection.perform(apiRequest)
} catch let error as NSError {
print("Error detected: \(error.localizedDescription)")
}//end API
print("End of payment api function.")
}//------------------------------------
}
Here is my appDelegate code - I just want to see if I get a callback - I'll add the code to process the response later ...
// AppDelegate.swift
// POSSDKTest2
//
// Created by Dr Craig E Curphey on 2022-06-14.
//
var squareTokenID = "not specified - let it fail - I just want a callback!"
import UIKit
import SquarePointOfSaleSDK
#main
class AppDelegate: UIResponder, UIApplicationDelegate {
//-------------------------------------------
func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
print("Callback was executed!")
guard SCCAPIResponse.isSquareResponse(url) else {
print("\(SCCAPIResponse.isSquareResponse(url))")
return true
}
do {
let response = try SCCAPIResponse(responseURL: url)
if let error = response.error {
// Handle a failed request.
print(error.localizedDescription)
} else {
// Handle a successful request.
}
} catch let error as NSError {
// Handle unexpected errors.
print(error.localizedDescription)
}
return true
}//-------------------------------------------------------
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
return true
}//-------------------------------------------------------
// MARK: UISceneSession Lifecycle
func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
// Called when a new scene session is being created.
// Use this method to select a configuration to create the new scene with.
return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
}//--------------------------------------------------------
func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
// Called when the user discards a scene session.
// If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
// Use this method to release any resources that were specific to the discarded scenes, as they will not return.
}//---------------------------------------------------------
}
Screenshot of console log from trying to do the api:
Console log
The work environment is Xcode 13.3, Swift, macOSMonterey 12.1 beta, iPad 10.2" (I think) mounted in a Square iPad kiosk with attached card reader, running iOS 15.5.
I would be very happy to send the whole project in a zip file to anyone who would be willing to take a look into why it is failing.