Fix building for Xcode 15 and 16

20 files changed, 162 insertions, 148 deletions

diff --git a/ios/MullvadVPN.xcodeproj/project.pbxproj b/ios/MullvadVPN.xcodeproj/project.pbxproj
index 7fe94e8467..99c369c428 100644
--- a/ios/MullvadVPN.xcodeproj/project.pbxproj
+++ b/ios/MullvadVPN.xcodeproj/project.pbxproj
@@ -846,7 +846,7 @@
 		A9D9A4D42C36E1EA004088DD /* mullvad_rust_runtime.h in Headers */ = {isa = PBXBuildFile; fileRef = A9D9A4D32C36E1EA004088DD /* mullvad_rust_runtime.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		A9DF789B2B7D1DF10094E4AD /* mullvad-api.h in Headers */ = {isa = PBXBuildFile; fileRef = 01EF6F2D2B6A51B100125696 /* mullvad-api.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		A9DF789D2B7D1E8B0094E4AD /* LoggedInWithTimeUITestCase.swift in Sources */ = {isa = PBXBuildFile; fileRef = 859089692B61763B003AF5F5 /* LoggedInWithTimeUITestCase.swift */; };
-		A9E031782ACB09930095D843 /* UIApplication+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = A9E031762ACB08950095D843 /* UIApplication+Extensions.swift */; };
+		A9E031782ACB09930095D843 /* BackgroundTaskProvider.swift in Sources */ = {isa = PBXBuildFile; fileRef = A9E031762ACB08950095D843 /* BackgroundTaskProvider.swift */; };
 		A9E0317A2ACB0AE70095D843 /* UIApplication+Stubs.swift in Sources */ = {isa = PBXBuildFile; fileRef = A9E031792ACB0AE70095D843 /* UIApplication+Stubs.swift */; };
 		A9E0317F2ACC331C0095D843 /* TunnelStatusBlockObserver.swift in Sources */ = {isa = PBXBuildFile; fileRef = A9E0317D2ACC32920095D843 /* TunnelStatusBlockObserver.swift */; };
 		A9E034642ABB302000E59A5A /* UIEdgeInsets+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = A9E034632ABB302000E59A5A /* UIEdgeInsets+Extensions.swift */; };
@@ -2070,7 +2070,7 @@
 		A9D96B192A8247C100A5C673 /* MigrationManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MigrationManager.swift; sourceTree = "<group>"; };
 		A9D9A4C02C36D53C004088DD /* MullvadRustRuntimeTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = MullvadRustRuntimeTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		A9D9A4D32C36E1EA004088DD /* mullvad_rust_runtime.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = mullvad_rust_runtime.h; path = include/mullvad_rust_runtime.h; sourceTree = "<group>"; };
-		A9E031762ACB08950095D843 /* UIApplication+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIApplication+Extensions.swift"; sourceTree = "<group>"; };
+		A9E031762ACB08950095D843 /* BackgroundTaskProvider.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BackgroundTaskProvider.swift; sourceTree = "<group>"; };
 		A9E031792ACB0AE70095D843 /* UIApplication+Stubs.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIApplication+Stubs.swift"; sourceTree = "<group>"; };
 		A9E0317D2ACC32920095D843 /* TunnelStatusBlockObserver.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TunnelStatusBlockObserver.swift; sourceTree = "<group>"; };
 		A9E034632ABB302000E59A5A /* UIEdgeInsets+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIEdgeInsets+Extensions.swift"; sourceTree = "<group>"; };
@@ -2686,7 +2686,7 @@
 				44BB5F962BE527F4002520EB /* TunnelState+UI.swift */,
 				A9E0317D2ACC32920095D843 /* TunnelStatusBlockObserver.swift */,
 				5803B4B12940A48700C23744 /* TunnelStore.swift */,
-				A9E031762ACB08950095D843 /* UIApplication+Extensions.swift */,
+				A9E031762ACB08950095D843 /* BackgroundTaskProvider.swift */,
 				5842102F282D8A3C00F24E46 /* UpdateAccountDataOperation.swift */,
 				58421031282E42B000F24E46 /* UpdateDeviceDataOperation.swift */,
 				A9F360332AAB626300F53531 /* VPNConnectionProtocol.swift */,
@@ -6041,7 +6041,7 @@
 				58D2240A294C90210029F5F8 /* IPAddress+Codable.swift in Sources */,
 				58E45A5729F12C5100281ECF /* Result+Extensions.swift in Sources */,
 				A90C48672C36BC2600DCB94C /* EphemeralPeerReceiver.swift in Sources */,
-				A9E031782ACB09930095D843 /* UIApplication+Extensions.swift in Sources */,
+				A9E031782ACB09930095D843 /* BackgroundTaskProvider.swift in Sources */,
 				58D2240B294C90210029F5F8 /* Cancellable.swift in Sources */,
 				58D2240C294C90210029F5F8 /* WrappingError.swift in Sources */,
 				A9A8A8EB2A262AB30086D569 /* FileCache.swift in Sources */,
diff --git a/ios/MullvadVPN/AddressCacheTracker/AddressCacheTracker.swift b/ios/MullvadVPN/AddressCacheTracker/AddressCacheTracker.swift
index 048d63d0b0..00d8b2fe13 100644
--- a/ios/MullvadVPN/AddressCacheTracker/AddressCacheTracker.swift
+++ b/ios/MullvadVPN/AddressCacheTracker/AddressCacheTracker.swift
@@ -21,7 +21,7 @@ final class AddressCacheTracker {
 
     /// Logger.
     private let logger = Logger(label: "AddressCache.Tracker")
-    private let application: UIApplication
+    private let backgroundTaskProvider: BackgroundTaskProviding
 
     /// REST API proxy.
     private let apiProxy: APIQuerying
@@ -45,8 +45,8 @@ final class AddressCacheTracker {
     private let nslock = NSLock()
 
     /// Designated initializer
-    init(application: UIApplication, apiProxy: APIQuerying, store: REST.AddressCache) {
-        self.application = application
+    init(backgroundTaskProvider: BackgroundTaskProviding, apiProxy: APIQuerying, store: REST.AddressCache) {
+        self.backgroundTaskProvider = backgroundTaskProvider
         self.apiProxy = apiProxy
         self.store = store
     }
@@ -103,7 +103,7 @@ final class AddressCacheTracker {
 
         operation.addObserver(
             BackgroundObserver(
-                backgroundTaskProvider: application,
+                backgroundTaskProvider: backgroundTaskProvider,
                 name: "Update endpoints",
                 cancelUponExpiration: true
             )
diff --git a/ios/MullvadVPN/AppDelegate.swift b/ios/MullvadVPN/AppDelegate.swift
index 6314dc62ac..2f78e90476 100644
--- a/ios/MullvadVPN/AppDelegate.swift
+++ b/ios/MullvadVPN/AppDelegate.swift
@@ -83,20 +83,32 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD
         let tunnelSettingsListener = TunnelSettingsListener()
         let tunnelSettingsUpdater = SettingsUpdater(listener: tunnelSettingsListener)
 
+        let backgroundTaskProvider = BackgroundTaskProvider(
+            backgroundTimeRemaining: application.backgroundTimeRemaining,
+            application: application
+        )
+
         relayCacheTracker = RelayCacheTracker(
             relayCache: ipOverrideWrapper,
-            application: application,
+            backgroundTaskProvider: backgroundTaskProvider,
             apiProxy: apiProxy
         )
 
-        addressCacheTracker = AddressCacheTracker(application: application, apiProxy: apiProxy, store: addressCache)
+        addressCacheTracker = AddressCacheTracker(
+            backgroundTaskProvider: backgroundTaskProvider,
+            apiProxy: apiProxy,
+            store: addressCache
+        )
 
-        tunnelStore = TunnelStore(application: application)
+        tunnelStore = TunnelStore(application: backgroundTaskProvider)
 
         let relaySelector = RelaySelectorWrapper(
             relayCache: ipOverrideWrapper
         )
-        tunnelManager = createTunnelManager(application: application, relaySelector: relaySelector)
+        tunnelManager = createTunnelManager(
+            backgroundTaskProvider: backgroundTaskProvider,
+            relaySelector: relaySelector
+        )
 
         settingsObserver = TunnelBlockObserver(didUpdateTunnelSettings: { _, settings in
             tunnelSettingsListener.onNewSettings?(settings)
@@ -104,7 +116,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD
         tunnelManager.addObserver(settingsObserver)
 
         storePaymentManager = StorePaymentManager(
-            backgroundTaskProvider: application,
+            backgroundTaskProvider: backgroundTaskProvider,
             queue: .default(),
             apiProxy: apiProxy,
             accountsProxy: accountsProxy,
@@ -155,11 +167,11 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD
     }
 
     private func createTunnelManager(
-        application: UIApplication,
+        backgroundTaskProvider: BackgroundTaskProviding,
         relaySelector: RelaySelectorProtocol
     ) -> TunnelManager {
         return TunnelManager(
-            application: application,
+            backgroundTaskProvider: backgroundTaskProvider,
             tunnelStore: tunnelStore,
             relayCacheTracker: relayCacheTracker,
             accountsProxy: accountsProxy,
diff --git a/ios/MullvadVPN/RelayCacheTracker/RelayCacheTracker.swift b/ios/MullvadVPN/RelayCacheTracker/RelayCacheTracker.swift
index e8731b5268..8b00f9f26a 100644
--- a/ios/MullvadVPN/RelayCacheTracker/RelayCacheTracker.swift
+++ b/ios/MullvadVPN/RelayCacheTracker/RelayCacheTracker.swift
@@ -34,7 +34,7 @@ final class RelayCacheTracker: RelayCacheTrackerProtocol {
     /// Relay cache.
     private let cache: RelayCacheProtocol
 
-    private let application: UIApplication
+    private let backgroundTaskProvider: BackgroundTaskProviding
 
     /// Lock used for synchronization.
     private let relayCacheLock = NSLock()
@@ -57,8 +57,8 @@ final class RelayCacheTracker: RelayCacheTrackerProtocol {
     /// Memory cache.
     private var cachedRelays: CachedRelays?
 
-    init(relayCache: RelayCacheProtocol, application: UIApplication, apiProxy: APIQuerying) {
-        self.application = application
+    init(relayCache: RelayCacheProtocol, backgroundTaskProvider: BackgroundTaskProviding, apiProxy: APIQuerying) {
+        self.backgroundTaskProvider = backgroundTaskProvider
         self.apiProxy = apiProxy
         cache = relayCache
 
@@ -181,7 +181,7 @@ final class RelayCacheTracker: RelayCacheTrackerProtocol {
 
         operation.addObserver(
             BackgroundObserver(
-                backgroundTaskProvider: application,
+                backgroundTaskProvider: backgroundTaskProvider,
                 name: "Update relays",
                 cancelUponExpiration: true
             )
diff --git a/ios/MullvadVPN/StorePaymentManager/StorePaymentManager.swift b/ios/MullvadVPN/StorePaymentManager/StorePaymentManager.swift
index dc2025df1e..8086e42161 100644
--- a/ios/MullvadVPN/StorePaymentManager/StorePaymentManager.swift
+++ b/ios/MullvadVPN/StorePaymentManager/StorePaymentManager.swift
@@ -30,7 +30,7 @@ final class StorePaymentManager: NSObject, SKPaymentTransactionObserver {
         return queue
     }()
 
-    private let backgroundTaskProvider: BackgroundTaskProvider
+    private let backgroundTaskProvider: BackgroundTaskProviding
     private let paymentQueue: SKPaymentQueue
     private let apiProxy: APIQuerying
     private let accountsProxy: RESTAccountHandling
@@ -57,7 +57,7 @@ final class StorePaymentManager: NSObject, SKPaymentTransactionObserver {
     ///   - accountsProxy: the object implementing `RESTAccountHandling`.
     ///   - transactionLog: an instance of transaction log. Typically ``StoreTransactionLog/default``.
     init(
-        backgroundTaskProvider: BackgroundTaskProvider,
+        backgroundTaskProvider: BackgroundTaskProviding,
         queue: SKPaymentQueue,
         apiProxy: APIQuerying,
         accountsProxy: RESTAccountHandling,
diff --git a/ios/MullvadVPN/TunnelManager/BackgroundTaskProvider.swift b/ios/MullvadVPN/TunnelManager/BackgroundTaskProvider.swift
new file mode 100644
index 0000000000..de826634e8
--- /dev/null
+++ b/ios/MullvadVPN/TunnelManager/BackgroundTaskProvider.swift
@@ -0,0 +1,64 @@
+//
+//  BackgroundTaskProvider.swift
+//  MullvadVPN
+//
+//  Created by Marco Nikic on 2023-10-02.
+//  Copyright © 2023 Mullvad VPN AB. All rights reserved.
+//
+
+#if canImport(UIKit)
+
+import Foundation
+import UIKit
+
+@available(iOSApplicationExtension, unavailable)
+public protocol BackgroundTaskProviding {
+    var backgroundTimeRemaining: TimeInterval { get }
+    #if compiler(>=6)
+    nonisolated
+    func beginBackgroundTask(
+        withName taskName: String?,
+        expirationHandler handler: (@MainActor @Sendable () -> Void)?
+    ) -> UIBackgroundTaskIdentifier
+    #else
+    func beginBackgroundTask(
+        withName taskName: String?,
+        expirationHandler handler: (() -> Void)?
+    ) -> UIBackgroundTaskIdentifier
+    #endif
+
+    func endBackgroundTask(_ identifier: UIBackgroundTaskIdentifier)
+}
+
+@available(iOSApplicationExtension, unavailable)
+public class BackgroundTaskProvider: BackgroundTaskProviding {
+    public var backgroundTimeRemaining: TimeInterval
+    weak var application: UIApplication!
+
+    public init(backgroundTimeRemaining: TimeInterval, application: UIApplication) {
+        self.backgroundTimeRemaining = backgroundTimeRemaining
+        self.application = application
+    }
+
+    #if compiler(>=6)
+    nonisolated
+    public func beginBackgroundTask(
+        withName taskName: String?,
+        expirationHandler handler: (@MainActor @Sendable () -> Void)?
+    ) -> UIBackgroundTaskIdentifier {
+        application.beginBackgroundTask(withName: taskName, expirationHandler: handler)
+    }
+    #else
+    public func beginBackgroundTask(
+        withName taskName: String?,
+        expirationHandler handler: (() -> Void)?
+    ) -> UIBackgroundTaskIdentifier {
+        application.beginBackgroundTask(withName: taskName, expirationHandler: handler)
+    }
+    #endif
+
+    public func endBackgroundTask(_ identifier: UIBackgroundTaskIdentifier) {
+        application.endBackgroundTask(identifier)
+    }
+}
+#endif
diff --git a/ios/MullvadVPN/TunnelManager/SendTunnelProviderMessageOperation.swift b/ios/MullvadVPN/TunnelManager/SendTunnelProviderMessageOperation.swift
index 04c574640c..47b8562f7f 100644
--- a/ios/MullvadVPN/TunnelManager/SendTunnelProviderMessageOperation.swift
+++ b/ios/MullvadVPN/TunnelManager/SendTunnelProviderMessageOperation.swift
@@ -23,7 +23,7 @@ private let defaultTimeout: Duration = .seconds(5)
 final class SendTunnelProviderMessageOperation<Output>: ResultOperation<Output> {
     typealias DecoderHandler = (Data?) throws -> Output
 
-    private let backgroundTaskProvider: BackgroundTaskProvider
+    private let backgroundTaskProvider: BackgroundTaskProviding
     private let tunnel: any TunnelProtocol
     private let message: TunnelProviderMessage
     private let timeout: Duration
@@ -38,7 +38,7 @@ final class SendTunnelProviderMessageOperation<Output>: ResultOperation<Output>
 
     init(
         dispatchQueue: DispatchQueue,
-        backgroundTaskProvider: BackgroundTaskProvider,
+        backgroundTaskProvider: BackgroundTaskProviding,
         tunnel: any TunnelProtocol,
         message: TunnelProviderMessage,
         timeout: Duration? = nil,
@@ -215,54 +215,6 @@ final class SendTunnelProviderMessageOperation<Output>: ResultOperation<Output>
     }
 }
 
-extension SendTunnelProviderMessageOperation where Output: Codable {
-    convenience init(
-        dispatchQueue: DispatchQueue,
-        backgroundTaskProvider: BackgroundTaskProvider,
-        tunnel: any TunnelProtocol,
-        message: TunnelProviderMessage,
-        timeout: Duration? = nil,
-        completionHandler: @escaping CompletionHandler
-    ) {
-        self.init(
-            dispatchQueue: dispatchQueue,
-            backgroundTaskProvider: backgroundTaskProvider,
-            tunnel: tunnel,
-            message: message,
-            timeout: timeout,
-            decoderHandler: { data in
-                if let data {
-                    return try TunnelProviderReply(messageData: data).value
-                } else {
-                    throw EmptyTunnelProviderResponseError()
-                }
-            },
-            completionHandler: completionHandler
-        )
-    }
-}
-
-extension SendTunnelProviderMessageOperation where Output == Void {
-    convenience init(
-        dispatchQueue: DispatchQueue,
-        backgroundTaskProvider: BackgroundTaskProvider,
-        tunnel: any TunnelProtocol,
-        message: TunnelProviderMessage,
-        timeout: Duration? = nil,
-        completionHandler: CompletionHandler?
-    ) {
-        self.init(
-            dispatchQueue: dispatchQueue,
-            backgroundTaskProvider: backgroundTaskProvider,
-            tunnel: tunnel,
-            message: message,
-            timeout: timeout,
-            decoderHandler: { _ in () },
-            completionHandler: completionHandler
-        )
-    }
-}
-
 enum SendTunnelProviderMessageError: LocalizedError, WrappingError {
     /// Tunnel process is either down or about to go down.
     case tunnelDown(NEVPNStatus)
diff --git a/ios/MullvadVPN/TunnelManager/Tunnel+Messaging.swift b/ios/MullvadVPN/TunnelManager/Tunnel+Messaging.swift
index 5f1d731d89..280420d086 100644
--- a/ios/MullvadVPN/TunnelManager/Tunnel+Messaging.swift
+++ b/ios/MullvadVPN/TunnelManager/Tunnel+Messaging.swift
@@ -32,6 +32,7 @@ extension TunnelProtocol {
             backgroundTaskProvider: backgroundTaskProvider,
             tunnel: self,
             message: .reconnectTunnel(nextRelays),
+            decoderHandler: { _ in () },
             completionHandler: completionHandler
         )
 
@@ -44,16 +45,24 @@ extension TunnelProtocol {
     func getTunnelStatus(
         completionHandler: @escaping (Result<ObservedState, Error>) -> Void
     ) -> Cancellable {
+        let decoderHandler: (Data?) throws -> ObservedState = { data in
+            if let data {
+                return try TunnelProviderReply<ObservedState>(messageData: data).value
+            } else {
+                throw EmptyTunnelProviderResponseError()
+            }
+        }
+
         let operation = SendTunnelProviderMessageOperation(
             dispatchQueue: dispatchQueue,
             backgroundTaskProvider: backgroundTaskProvider,
             tunnel: self,
             message: .getTunnelStatus,
+            decoderHandler: decoderHandler,
             completionHandler: completionHandler
         )
 
         operationQueue.addOperation(operation)
-
         return operation
     }
 
@@ -62,12 +71,21 @@ extension TunnelProtocol {
         _ proxyRequest: ProxyURLRequest,
         completionHandler: @escaping (Result<ProxyURLResponse, Error>) -> Void
     ) -> Cancellable {
+        let decoderHandler: (Data?) throws -> ProxyURLResponse = { data in
+            if let data {
+                return try TunnelProviderReply<ProxyURLResponse>(messageData: data).value
+            } else {
+                throw EmptyTunnelProviderResponseError()
+            }
+        }
+
         let operation = SendTunnelProviderMessageOperation(
             dispatchQueue: dispatchQueue,
             backgroundTaskProvider: backgroundTaskProvider,
             tunnel: self,
             message: .sendURLRequest(proxyRequest),
             timeout: proxyRequestTimeout,
+            decoderHandler: decoderHandler,
             completionHandler: completionHandler
         )
 
@@ -79,6 +97,7 @@ extension TunnelProtocol {
                 backgroundTaskProvider: backgroundTaskProvider,
                 tunnel: self,
                 message: .cancelURLRequest(proxyRequest.id),
+                decoderHandler: decoderHandler,
                 completionHandler: nil
             )
 
@@ -99,6 +118,7 @@ extension TunnelProtocol {
             backgroundTaskProvider: backgroundTaskProvider,
             tunnel: self,
             message: .privateKeyRotation,
+            decoderHandler: { _ in () },
             completionHandler: completionHandler
         )
 
diff --git a/ios/MullvadVPN/TunnelManager/Tunnel.swift b/ios/MullvadVPN/TunnelManager/Tunnel.swift
index 0b767e80d3..9489998ef6 100644
--- a/ios/MullvadVPN/TunnelManager/Tunnel.swift
+++ b/ios/MullvadVPN/TunnelManager/Tunnel.swift
@@ -26,9 +26,9 @@ protocol TunnelProtocol: AnyObject {
     var status: NEVPNStatus { get }
     var isOnDemandEnabled: Bool { get set }
     var startDate: Date? { get }
-    var backgroundTaskProvider: BackgroundTaskProvider { get }
+    var backgroundTaskProvider: BackgroundTaskProviding { get }
 
-    init(tunnelProvider: TunnelManagerProtocol, backgroundTaskProvider: BackgroundTaskProvider)
+    init(tunnelProvider: TunnelManagerProtocol, backgroundTaskProvider: BackgroundTaskProviding)
 
     func addObserver(_ observer: any TunnelStatusObserver)
     func removeObserver(_ observer: any TunnelStatusObserver)
@@ -53,7 +53,7 @@ final class Tunnel: TunnelProtocol, Equatable {
     /// Unique identifier assigned to instance at the time of creation.
     let identifier = UUID()
 
-    var backgroundTaskProvider: any BackgroundTaskProvider
+    var backgroundTaskProvider: BackgroundTaskProviding
 
     #if DEBUG
     /// System VPN configuration identifier.
@@ -117,7 +117,7 @@ final class Tunnel: TunnelProtocol, Equatable {
     private var _startDate: Date?
     internal let tunnelProvider: TunnelProviderManagerType
 
-    init(tunnelProvider: TunnelProviderManagerType, backgroundTaskProvider: BackgroundTaskProvider) {
+    init(tunnelProvider: TunnelProviderManagerType, backgroundTaskProvider: BackgroundTaskProviding) {
         self.tunnelProvider = tunnelProvider
         self.backgroundTaskProvider = backgroundTaskProvider
 
diff --git a/ios/MullvadVPN/TunnelManager/TunnelInteractor.swift b/ios/MullvadVPN/TunnelManager/TunnelInteractor.swift
index 39587cb688..cb268ef330 100644
--- a/ios/MullvadVPN/TunnelManager/TunnelInteractor.swift
+++ b/ios/MullvadVPN/TunnelManager/TunnelInteractor.swift
@@ -16,7 +16,7 @@ protocol TunnelInteractor {
     // MARK: - Tunnel manipulation
 
     var tunnel: (any TunnelProtocol)? { get }
-    var backgroundTaskProvider: any BackgroundTaskProvider { get }
+    var backgroundTaskProvider: BackgroundTaskProviding { get }
 
     func getPersistentTunnels() -> [any TunnelProtocol]
     func createNewTunnel() -> any TunnelProtocol
diff --git a/ios/MullvadVPN/TunnelManager/TunnelManager.swift b/ios/MullvadVPN/TunnelManager/TunnelManager.swift
index 758be0bcb6..4703fe3cda 100644
--- a/ios/MullvadVPN/TunnelManager/TunnelManager.swift
+++ b/ios/MullvadVPN/TunnelManager/TunnelManager.swift
@@ -42,7 +42,7 @@ final class TunnelManager: StorePaymentObserver {
 
     // MARK: - Internal variables
 
-    let application: BackgroundTaskProvider
+    let backgroundTaskProvider: BackgroundTaskProviding
     fileprivate let tunnelStore: any TunnelStoreProtocol
     private let relayCacheTracker: RelayCacheTrackerProtocol
     private let accountsProxy: RESTAccountHandling
@@ -81,7 +81,7 @@ final class TunnelManager: StorePaymentObserver {
     // MARK: - Initialization
 
     init(
-        application: BackgroundTaskProvider,
+        backgroundTaskProvider: BackgroundTaskProviding,
         tunnelStore: any TunnelStoreProtocol,
         relayCacheTracker: RelayCacheTrackerProtocol,
         accountsProxy: RESTAccountHandling,
@@ -90,7 +90,7 @@ final class TunnelManager: StorePaymentObserver {
         accessTokenManager: RESTAccessTokenManagement,
         relaySelector: RelaySelectorProtocol
     ) {
-        self.application = application
+        self.backgroundTaskProvider = backgroundTaskProvider
         self.tunnelStore = tunnelStore
         self.relayCacheTracker = relayCacheTracker
         self.accountsProxy = accountsProxy
@@ -103,9 +103,9 @@ final class TunnelManager: StorePaymentObserver {
 
         NotificationCenter.default.addObserver(
             self,
-            selector: #selector(applicationDidBecomeActive(_:)),
+            selector: #selector(applicationDidBecomeActive),
             name: UIApplication.didBecomeActiveNotification,
-            object: application
+            object: nil
         )
     }
 
@@ -204,7 +204,7 @@ final class TunnelManager: StorePaymentObserver {
 
         loadTunnelOperation.addObserver(
             BackgroundObserver(
-                backgroundTaskProvider: application,
+                backgroundTaskProvider: backgroundTaskProvider,
                 name: "Load tunnel configuration",
                 cancelUponExpiration: false
             )
@@ -244,7 +244,7 @@ final class TunnelManager: StorePaymentObserver {
         )
 
         operation.addObserver(BackgroundObserver(
-            backgroundTaskProvider: application,
+            backgroundTaskProvider: backgroundTaskProvider,
             name: "Start tunnel",
             cancelUponExpiration: true
         ))
@@ -279,7 +279,7 @@ final class TunnelManager: StorePaymentObserver {
         }
 
         operation.addObserver(BackgroundObserver(
-            backgroundTaskProvider: application,
+            backgroundTaskProvider: backgroundTaskProvider,
             name: "Stop tunnel",
             cancelUponExpiration: true
         ))
@@ -315,7 +315,7 @@ final class TunnelManager: StorePaymentObserver {
 
         operation.addObserver(
             BackgroundObserver(
-                backgroundTaskProvider: application,
+                backgroundTaskProvider: backgroundTaskProvider,
                 name: "Reconnect tunnel",
                 cancelUponExpiration: true
             )
@@ -355,7 +355,7 @@ final class TunnelManager: StorePaymentObserver {
         }
 
         operation.addObserver(BackgroundObserver(
-            backgroundTaskProvider: application,
+            backgroundTaskProvider: backgroundTaskProvider,
             name: action.taskName,
             cancelUponExpiration: true
         ))
@@ -408,7 +408,7 @@ final class TunnelManager: StorePaymentObserver {
 
         operation.addObserver(
             BackgroundObserver(
-                backgroundTaskProvider: application,
+                backgroundTaskProvider: backgroundTaskProvider,
                 name: "Update account data",
                 cancelUponExpiration: true
             )
@@ -437,7 +437,7 @@ final class TunnelManager: StorePaymentObserver {
 
         operation.addObserver(
             BackgroundObserver(
-                backgroundTaskProvider: application,
+                backgroundTaskProvider: backgroundTaskProvider,
                 name: "Redeem voucher",
                 cancelUponExpiration: true
             )
@@ -467,7 +467,7 @@ final class TunnelManager: StorePaymentObserver {
 
         operation.addObserver(
             BackgroundObserver(
-                backgroundTaskProvider: application,
+                backgroundTaskProvider: backgroundTaskProvider,
                 name: "Update device data",
                 cancelUponExpiration: true
             )
@@ -503,7 +503,7 @@ final class TunnelManager: StorePaymentObserver {
 
         operation.addObserver(
             BackgroundObserver(
-                backgroundTaskProvider: application,
+                backgroundTaskProvider: backgroundTaskProvider,
                 name: "Rotate private key",
                 cancelUponExpiration: true
             )
@@ -779,7 +779,7 @@ final class TunnelManager: StorePaymentObserver {
 
     // MARK: - Private methods
 
-    @objc private func applicationDidBecomeActive(_ notification: Notification) {
+    @objc private func applicationDidBecomeActive() {
         #if DEBUG
         logger.debug("Refresh device state and tunnel status due to application becoming active.")
         #endif
@@ -898,7 +898,7 @@ final class TunnelManager: StorePaymentObserver {
 
         operation.addCondition(MutuallyExclusive(category: OperationCategory.deviceStateUpdate.category))
         operation.addObserver(BackgroundObserver(
-            backgroundTaskProvider: application,
+            backgroundTaskProvider: backgroundTaskProvider,
             name: "Refresh device state",
             cancelUponExpiration: true
         ))
@@ -958,7 +958,7 @@ final class TunnelManager: StorePaymentObserver {
         }
 
         operation.addObserver(BackgroundObserver(
-            backgroundTaskProvider: application,
+            backgroundTaskProvider: backgroundTaskProvider,
             name: taskName,
             cancelUponExpiration: false
         ))
@@ -994,7 +994,7 @@ final class TunnelManager: StorePaymentObserver {
         }
 
         operation.addObserver(BackgroundObserver(
-            backgroundTaskProvider: application,
+            backgroundTaskProvider: backgroundTaskProvider,
             name: taskName,
             cancelUponExpiration: false
         ))
@@ -1204,8 +1204,8 @@ private struct TunnelInteractorProxy: TunnelInteractor {
         tunnelManager.tunnel
     }
 
-    var backgroundTaskProvider: any BackgroundTaskProvider {
-        tunnelManager.application
+    var backgroundTaskProvider: BackgroundTaskProviding {
+        tunnelManager.backgroundTaskProvider
     }
 
     func getPersistentTunnels() -> [any TunnelProtocol] {
diff --git a/ios/MullvadVPN/TunnelManager/TunnelStore.swift b/ios/MullvadVPN/TunnelManager/TunnelStore.swift
index 705a1f0ab2..fa1fb0f3d7 100644
--- a/ios/MullvadVPN/TunnelManager/TunnelStore.swift
+++ b/ios/MullvadVPN/TunnelManager/TunnelStore.swift
@@ -23,7 +23,7 @@ final class TunnelStore: TunnelStoreProtocol, TunnelStatusObserver {
     typealias TunnelType = Tunnel
     private let logger = Logger(label: "TunnelStore")
     private let lock = NSLock()
-    private let application: BackgroundTaskProvider
+    private let application: BackgroundTaskProviding
 
     /// Persistent tunnels registered with the system.
     private var persistentTunnels: [TunnelType] = []
@@ -31,7 +31,7 @@ final class TunnelStore: TunnelStoreProtocol, TunnelStatusObserver {
     /// Newly created tunnels, stored as collection of weak boxes.
     private var newTunnels: [WeakBox<TunnelType>] = []
 
-    init(application: BackgroundTaskProvider) {
+    init(application: BackgroundTaskProviding) {
         self.application = application
         NotificationCenter.default.addObserver(
             self,
diff --git a/ios/MullvadVPN/TunnelManager/UIApplication+Extensions.swift b/ios/MullvadVPN/TunnelManager/UIApplication+Extensions.swift
deleted file mode 100644
index ed06c325aa..0000000000
--- a/ios/MullvadVPN/TunnelManager/UIApplication+Extensions.swift
+++ /dev/null
@@ -1,34 +0,0 @@
-//
-//  UIApplication+Extensions.swift
-//  MullvadVPN
-//
-//  Created by Marco Nikic on 2023-10-02.
-//  Copyright © 2023 Mullvad VPN AB. All rights reserved.
-//
-
-#if canImport(UIKit)
-
-import Foundation
-import UIKit
-
-public protocol BackgroundTaskProvider {
-    var backgroundTimeRemaining: TimeInterval { get }
-    func endBackgroundTask(_ identifier: UIBackgroundTaskIdentifier)
-
-    #if compiler(>=6)
-    nonisolated
-    func beginBackgroundTask(
-        withName taskName: String?,
-        expirationHandler handler: (@MainActor @Sendable () -> Void)?
-    ) -> UIBackgroundTaskIdentifier
-    #else
-    func beginBackgroundTask(
-        withName taskName: String?,
-        expirationHandler handler: (() -> Void)?
-    ) -> UIBackgroundTaskIdentifier
-    #endif
-}
-
-extension UIApplication: BackgroundTaskProvider {}
-
-#endif
diff --git a/ios/MullvadVPNTests/MullvadVPN/TunnelManager/MockTunnel.swift b/ios/MullvadVPNTests/MullvadVPN/TunnelManager/MockTunnel.swift
index 302e4ca2f7..6edd2059cc 100644
--- a/ios/MullvadVPNTests/MullvadVPN/TunnelManager/MockTunnel.swift
+++ b/ios/MullvadVPNTests/MullvadVPN/TunnelManager/MockTunnel.swift
@@ -19,9 +19,9 @@ class MockTunnel: TunnelProtocol {
 
     var startDate: Date?
 
-    var backgroundTaskProvider: any BackgroundTaskProvider
+    var backgroundTaskProvider: BackgroundTaskProviding
 
-    required init(tunnelProvider: TunnelManagerProtocol, backgroundTaskProvider: BackgroundTaskProvider) {
+    required init(tunnelProvider: TunnelManagerProtocol, backgroundTaskProvider: BackgroundTaskProviding) {
         status = .disconnected
         isOnDemandEnabled = false
         startDate = nil
diff --git a/ios/MullvadVPNTests/MullvadVPN/TunnelManager/MockTunnelInteractor.swift b/ios/MullvadVPNTests/MullvadVPN/TunnelManager/MockTunnelInteractor.swift
index 6f8999b19c..552607a279 100644
--- a/ios/MullvadVPNTests/MullvadVPN/TunnelManager/MockTunnelInteractor.swift
+++ b/ios/MullvadVPNTests/MullvadVPN/TunnelManager/MockTunnelInteractor.swift
@@ -23,7 +23,7 @@ class MockTunnelInteractor: TunnelInteractor {
 
     var tunnel: (any TunnelProtocol)?
 
-    var backgroundTaskProvider: any BackgroundTaskProvider {
+    var backgroundTaskProvider: BackgroundTaskProviding {
         UIApplicationStub()
     }
 
diff --git a/ios/MullvadVPNTests/MullvadVPN/TunnelManager/TunnelManagerTests.swift b/ios/MullvadVPNTests/MullvadVPN/TunnelManager/TunnelManagerTests.swift
index d4bf276f15..19c59a3f05 100644
--- a/ios/MullvadVPNTests/MullvadVPN/TunnelManager/TunnelManagerTests.swift
+++ b/ios/MullvadVPNTests/MullvadVPN/TunnelManager/TunnelManagerTests.swift
@@ -18,7 +18,7 @@ class TunnelManagerTests: XCTestCase {
     static let store = InMemorySettingsStore<SettingNotFound>()
     private var tunnelObserver: TunnelObserver!
 
-    var application: UIApplicationStub!
+    var application: BackgroundTaskProviding!
     var relayCacheTracker: RelayCacheTrackerStub!
     var accountProxy: AccountsProxyStub!
     var accessTokenManager: AccessTokenManagerStub!
@@ -87,7 +87,7 @@ class TunnelManagerTests: XCTestCase {
         accountProxy.createAccountResult = .success(REST.NewAccountData.mockValue())
 
         let tunnelManager = TunnelManager(
-            application: application,
+            backgroundTaskProvider: application,
             tunnelStore: TunnelStoreStub(backgroundTaskProvider: application),
             relayCacheTracker: relayCacheTracker,
             accountsProxy: accountProxy,
@@ -105,7 +105,7 @@ class TunnelManagerTests: XCTestCase {
         accountProxy.createAccountResult = .success(REST.NewAccountData.mockValue())
 
         let tunnelManager = TunnelManager(
-            application: application,
+            backgroundTaskProvider: application,
             tunnelStore: TunnelStoreStub(backgroundTaskProvider: application),
             relayCacheTracker: relayCacheTracker,
             accountsProxy: accountProxy,
@@ -135,7 +135,7 @@ class TunnelManagerTests: XCTestCase {
         }
 
         let tunnelManager = TunnelManager(
-            application: application,
+            backgroundTaskProvider: application,
             tunnelStore: TunnelStore(application: application),
             relayCacheTracker: relayCacheTracker,
             accountsProxy: accountProxy,
diff --git a/ios/MullvadVPNTests/MullvadVPN/TunnelManager/TunnelStore+Stubs.swift b/ios/MullvadVPNTests/MullvadVPN/TunnelManager/TunnelStore+Stubs.swift
index cc89fd776b..f894627151 100644
--- a/ios/MullvadVPNTests/MullvadVPN/TunnelManager/TunnelStore+Stubs.swift
+++ b/ios/MullvadVPNTests/MullvadVPN/TunnelManager/TunnelStore+Stubs.swift
@@ -12,7 +12,7 @@ import NetworkExtension
 
 struct TunnelStoreStub: TunnelStoreProtocol {
     typealias TunnelType = TunnelStub
-    let backgroundTaskProvider: any BackgroundTaskProvider
+    let backgroundTaskProvider: any BackgroundTaskProviding
     func getPersistentTunnels() -> [TunnelType] {
         []
     }
@@ -35,13 +35,13 @@ final class TunnelStub: TunnelProtocol, Equatable {
 
     convenience init(
         tunnelProvider: SimulatorTunnelProviderManager,
-        backgroundTaskProvider: any BackgroundTaskProvider
+        backgroundTaskProvider: any BackgroundTaskProviding
     ) {
         self.init(backgroundTaskProvider: backgroundTaskProvider, status: .invalid, isOnDemandEnabled: false)
     }
 
     init(
-        backgroundTaskProvider: any BackgroundTaskProvider,
+        backgroundTaskProvider: any BackgroundTaskProviding,
         status: NEVPNStatus,
         isOnDemandEnabled: Bool,
         startDate: Date? = nil
@@ -56,7 +56,7 @@ final class TunnelStub: TunnelProtocol, Equatable {
 
     func removeObserver(_ observer: TunnelStatusObserver) {}
 
-    var backgroundTaskProvider: any BackgroundTaskProvider
+    var backgroundTaskProvider: any BackgroundTaskProviding
 
     var status: NEVPNStatus
 
diff --git a/ios/MullvadVPNTests/MullvadVPN/TunnelManager/UIApplication+Stubs.swift b/ios/MullvadVPNTests/MullvadVPN/TunnelManager/UIApplication+Stubs.swift
index a220578bb6..5724086438 100644
--- a/ios/MullvadVPNTests/MullvadVPN/TunnelManager/UIApplication+Stubs.swift
+++ b/ios/MullvadVPNTests/MullvadVPN/TunnelManager/UIApplication+Stubs.swift
@@ -11,7 +11,7 @@ import UIKit
 
 @testable import MullvadTypes
 
-struct UIApplicationStub: BackgroundTaskProvider {
+struct UIApplicationStub: BackgroundTaskProviding {
     var backgroundTimeRemaining: TimeInterval { .infinity }
 
     func endBackgroundTask(_ identifier: UIBackgroundTaskIdentifier) {}
diff --git a/ios/Operations/BackgroundObserver.swift b/ios/Operations/BackgroundObserver.swift
index 2b9181a073..5165780a15 100644
--- a/ios/Operations/BackgroundObserver.swift
+++ b/ios/Operations/BackgroundObserver.swift
@@ -14,12 +14,12 @@ import UIKit
 @available(iOSApplicationExtension, unavailable)
 public final class BackgroundObserver: OperationObserver {
     public let name: String
-    public let backgroundTaskProvider: BackgroundTaskProvider
+    public let backgroundTaskProvider: BackgroundTaskProviding
     public let cancelUponExpiration: Bool
 
     private var taskIdentifier: UIBackgroundTaskIdentifier?
 
-    public init(backgroundTaskProvider: BackgroundTaskProvider, name: String, cancelUponExpiration: Bool) {
+    public init(backgroundTaskProvider: BackgroundTaskProviding, name: String, cancelUponExpiration: Bool) {
         self.backgroundTaskProvider = backgroundTaskProvider
         self.name = name
         self.cancelUponExpiration = cancelUponExpiration
diff --git a/ios/Operations/ResultOperation.swift b/ios/Operations/ResultOperation.swift
index d555b4a9bc..e377ecf9f5 100644
--- a/ios/Operations/ResultOperation.swift
+++ b/ios/Operations/ResultOperation.swift
@@ -9,7 +9,7 @@
 import Foundation
 
 /// Base class for operations producing result.
-open class ResultOperation<Success>: AsyncOperation, OutputOperation {
+open class ResultOperation<Success>: AsyncOperation, OutputOperation, @unchecked Sendable {
     public typealias CompletionHandler = (Result<Success, Error>) -> Void
 
     private let nslock = NSLock()