ios: react to change in connectivity.

Use NwPathMonitor to monitor change in connectivity, and trigger the
offline banner when going offline, and a manual reconnection when going
back online.

Author: bznein

backend/backend.go

@@ -279,9 +279,6 @@ func NewBackend(arguments *arguments.Arguments, environment Environment) (*Backe
 		log: log,
 
 		testing: backendConfig.AppConfig().Backend.StartInTestnet || arguments.Testing(),
-
-		// TODO: remove when connectivity check is present on all platforms
-		isOnline: true,
 	}
 	// TODO: remove when connectivity check is present on all platforms
 	backend.isOnline.Store(true)

backend/mobileserver/mobileserver.go

@@ -157,6 +157,11 @@ func UsingMobileDataChanged() {
 	bridgecommon.UsingMobileDataChanged()
 }
 
+// SetOnline exposes `bridgecommon.SetOnline` to Java/Kotlin.
+func SetOnline(online bool) {
+	bridgecommon.SetOnline(online)
+}
+
 // UsbUpdate exposes `bridgecommon.UsbUpdate` to Java/Kotlin.
 func UsbUpdate() {
 	bridgecommon.UsbUpdate()

frontends/ios/BitBoxApp/BitBoxApp.xcodeproj/project.pbxproj

@@ -7,6 +7,8 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		8E1846EB2E0AFF6000802D8B /* NetworkMonitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8E1846EA2E0AFF5B00802D8B /* NetworkMonitor.swift */; };
+		8E1846EC2E0AFF6000802D8B /* NetworkMonitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8E1846EA2E0AFF5B00802D8B /* NetworkMonitor.swift */; };
 		D700B5F62C884C34000496D4 /* Mobileserver.xcframework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = D76518BB2B1F8F7400DC03A9 /* Mobileserver.xcframework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		D700B5FD2CA2FFAF000496D4 /* WebView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D76516322B1F3D1A00DC03A9 /* WebView.swift */; };
 		D700B5FE2CA2FFAF000496D4 /* BitBoxAppApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = D76516082B1F3B1300DC03A9 /* BitBoxAppApp.swift */; };
@@ -71,6 +73,7 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		8E1846EA2E0AFF5B00802D8B /* NetworkMonitor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NetworkMonitor.swift; sourceTree = "<group>"; };
 		D700B5F82C888CB9000496D4 /* Config.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Config.xcconfig; sourceTree = "<group>"; };
 		D700B5F92C986A3C000496D4 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist; path = Info.plist; sourceTree = "<group>"; };
 		D700B60A2CA2FFAF000496D4 /* BitBoxApp Testnet.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "BitBoxApp Testnet.app"; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -151,6 +154,7 @@
 		D76516072B1F3B1300DC03A9 /* BitBoxApp */ = {
 			isa = PBXGroup;
 			children = (
+				8E1846EA2E0AFF5B00802D8B /* NetworkMonitor.swift */,
 				D700B5F92C986A3C000496D4 /* Info.plist */,
 				D76518B52B1F45B300DC03A9 /* assets */,
 				D76516082B1F3B1300DC03A9 /* BitBoxAppApp.swift */,
@@ -400,6 +404,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				D700B5FD2CA2FFAF000496D4 /* WebView.swift in Sources */,
+				8E1846EC2E0AFF6000802D8B /* NetworkMonitor.swift in Sources */,
 				D721B20E2D36A00000767080 /* Bluetooth.swift in Sources */,
 				D700B5FE2CA2FFAF000496D4 /* BitBoxAppApp.swift in Sources */,
 			);
@@ -410,6 +415,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				D76516332B1F3D1B00DC03A9 /* WebView.swift in Sources */,
+				8E1846EB2E0AFF6000802D8B /* NetworkMonitor.swift in Sources */,
 				D721B20D2D369EC100767080 /* Bluetooth.swift in Sources */,
 				D76516092B1F3B1300DC03A9 /* BitBoxAppApp.swift in Sources */,
 			);
@@ -464,7 +470,7 @@
 				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
 				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = UIInterfaceOrientationPortrait;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
@@ -496,7 +502,7 @@
 				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
 				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = UIInterfaceOrientationPortrait;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
@@ -644,7 +650,7 @@
 				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
 				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = UIInterfaceOrientationPortrait;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
@@ -675,7 +681,7 @@
 				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
 				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = UIInterfaceOrientationPortrait;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",

frontends/ios/BitBoxApp/BitBoxApp/BitBoxAppApp.swift

@@ -8,6 +8,7 @@
 import SwiftUI
 import Mobileserver
 import LocalAuthentication
+import Network
 
 protocol MessageHandlersProtocol {
     func callResponseHandler(queryID: Int, response: String)
@@ -184,6 +185,10 @@ struct BitBoxAppApp: App {
                     .edgesIgnoringSafeArea(.all)
                     .onAppear {
                         setupGoAPI(goAPI: goAPI)
+                        _ = NetworkMonitor.shared
+                        // Manual trigger at startup
+                        let isOnline = NWPathMonitor().currentPath.status == .satisfied
+                        MobileserverSetOnline(isOnline)
                     }
                     .onReceive(NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification)) { _ in
                         MobileserverManualReconnect()

frontends/ios/BitBoxApp/BitBoxApp/NetworkMonitor.swift

@@ -0,0 +1,24 @@
+//
+//  NetworkMonitor.swift
+//  BitBoxApp
+//
+//  Created by Nikolas De Giorgis on 24/06/2025.
+//
+
+import Network
+import Mobileserver
+
+class NetworkMonitor {
+	static let shared = NetworkMonitor()
+	private let monitor = NWPathMonitor()
+	private let queue = DispatchQueue(label: "NetworkMonitor")
+	
+	private init() {
+		monitor.pathUpdateHandler = { path in
+			let isOnline = path.status == .satisfied
+			print("Network status changed: \(isOnline)")
+			MobileServerSetOnline(isOnline)
+		}
+		monitor.start(queue: queue)
+	}
+}

frontends/qt/network.cpp

@@ -1,41 +1,29 @@
 #include <QNetworkInformation>
 #include "libserver.h"
-<<<<<<< HEAD
 #include "network.h"
-=======
->>>>>>> b8afb2139 (frontend/qt: react to change in connectivity status.)
 
 void setupReachabilityNotifier() {
     auto loaded = QNetworkInformation::loadBackendByFeatures(QNetworkInformation::Feature::Reachability);
     if (!loaded) {
-<<<<<<< HEAD
         goLog("can't load QNetworkInformation backend");
         // If we can't load the backend, we can't determine whether or not to show the banner.
         setOnline(true);
-=======
->>>>>>> b8afb2139 (frontend/qt: react to change in connectivity status.)
         return;
     }
     QNetworkInformation* info = QNetworkInformation::instance();
     if (info) {
       QObject::connect(info, &QNetworkInformation::reachabilityChanged, [](QNetworkInformation::Reachability reachability){
-<<<<<<< HEAD
           // We include Reachability::Unknown here as we prefer not include false positives. If QT can't determine whether
           // we are online, we do not show the banner.
           bool isReachable = (reachability == QNetworkInformation::Reachability::Online || reachability == QNetworkInformation::Reachability::Unknown);
           setOnline(isReachable);
-=======
-        bool isReachable = (reachability == QNetworkInformation::Reachability::Online);
-        onlineStatusChanged(isReachable);
->>>>>>> b8afb2139 (frontend/qt: react to change in connectivity status.)
       });
     }
 }
 
 bool isReachable() {
     auto loaded = QNetworkInformation::loadBackendByFeatures(QNetworkInformation::Feature::Reachability);
     if (!loaded) {
-<<<<<<< HEAD
         goLog("can't load QNetworkInformation backend");
         return true;
     }
@@ -45,14 +33,4 @@ bool isReachable() {
     }
     // Same as above, if we can't obtain information, we don't show any banner at all.
     return true;
-=======
-        return false;
-    }
-    QNetworkInformation* info = QNetworkInformation::instance();
-    if (info) {
-        return info->reachability() == QNetworkInformation::Reachability::Online;
-    } else {
-        return false;
-    }
->>>>>>> b8afb2139 (frontend/qt: react to change in connectivity status.)
 }