Workaround for iOS 18+ users

Author: mineek

MuffinStoreJailed/ContentView.swift

@@ -72,7 +72,13 @@ struct ContentView: View {
                 .textFieldStyle(RoundedBorderTextFieldStyle())
                 .padding()
                 Button("Authenticate") {
-                    if appleId.isEmpty || password.isEmpty || code.isEmpty {
+                    if appleId.isEmpty || password.isEmpty {
+                        return
+                    }
+                    if code.isEmpty {
+                        // we can just try to log in and it'll request a code, very scuffed tho.
+                        ipaTool = IPATool(appleId: appleId, password: password)
+                        ipaTool?.authenticate(requestCode: true)
                         return
                     }
                     let finalPassword = password + code

MuffinStoreJailed/IPATool.swift

@@ -110,7 +110,7 @@ class StoreClient {
         return false
     }
 
-    func authenticate() -> Bool {
+    func authenticate(requestCode: Bool = false) -> Bool {
         if self.guid == nil {
             self.guid = generateGuid(appleId: appleId)
         }
@@ -186,6 +186,10 @@ class StoreClient {
             if ret {
                 break
             }
+            if requestCode {
+                ret = false
+                break
+            }
         }
         return ret
     }
@@ -284,11 +288,10 @@ class IPATool {
         storeClient = StoreClient(appleId: appleId, password: password)
     }
 
-    func authenticate() -> Bool {
+    func authenticate(requestCode: Bool = false) -> Bool {
         print("Authenticating to iTunes Store...")
         if !storeClient.tryLoadAuthInfo() {
-            // storeClient.authenticate()
-            return storeClient.authenticate()
+            return storeClient.authenticate(requestCode: requestCode)
         } else {
             return true
         }

README.md

@@ -9,3 +9,5 @@ The UI is a bit scuffed, there's no progress bar during downgrading so just wait
 I am not responsible for any issues caused by the usage of this tool, it's experimental and I will not be held accountable if anything happens. Use at your own risk. Although nothing should happen, just putting this here just in case.
 
 The app you want to downgrade will need to be uninstalled, however, you can preserve app data by offloading the app first, and then downgrading it.
+
+You should request a 2fa code BEFORE logging in, via the Settings app, however, if the settings app doesn't show the option ( iOS 18+ ), you can leave the code field empty, and then you should get a popup, accept it, and copy the code from there. If it doesn't log you in fully close and re-open the app and try again.