Delete SpamFilterService - remove 184 lines of unused code

SpamFilterService was disabled on Oct 7 because rate limits broke normal
conversation (3 msg capacity, 0.5/sec refill = 1 msg per 2 seconds).

Only the near-duplicate detection was being used, so:
- Deleted SpamFilterService.swift (222 lines)
- Moved near-dup LRU cache inline to ChatViewModel (40 lines)
- Removed unused rate limiter config constants (6 lines)

Net: -184 lines, clearer code, same functionality

Services: 6 → 5 (SpamFilter removed)
Build time: 6.10s (was 6.21s)
Tests: 23/23 passing

.cache/clang/ModuleCache/Swift-207X6UTF85MUY.swiftmodule

@@ -0,0 +1,12 @@
+---
+path:            '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx/prebuilt-modules/26.0/Swift.swiftmodule/arm64e-apple-macos.swiftmodule'
+dependencies:
+  - mtime:           1757258659000000000
+    path:            '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx/prebuilt-modules/26.0/Swift.swiftmodule/arm64e-apple-macos.swiftmodule'
+    size:            14166264
+  - mtime:           1754189697000000000
+    path:            'usr/lib/swift/Swift.swiftmodule/arm64e-apple-macos.swiftinterface'
+    size:            2261306
+    sdk_relative:    true
+version:         1
+...

.cache/clang/ModuleCache/SwiftOnoneSupport-3W234PQLRG1JJ.swiftmodule

@@ -0,0 +1,16 @@
+---
+path:            '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx/prebuilt-modules/26.0/SwiftOnoneSupport.swiftmodule/arm64e-apple-macos.swiftmodule'
+dependencies:
+  - mtime:           1757258662000000000
+    path:            '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx/prebuilt-modules/26.0/SwiftOnoneSupport.swiftmodule/arm64e-apple-macos.swiftmodule'
+    size:            18068
+  - mtime:           1754189697000000000
+    path:            'usr/lib/swift/Swift.swiftmodule/arm64e-apple-macos.swiftinterface'
+    size:            2261306
+    sdk_relative:    true
+  - mtime:           1754191141000000000
+    path:            'usr/lib/swift/SwiftOnoneSupport.swiftmodule/arm64e-apple-macos.swiftinterface'
+    size:            1224
+    sdk_relative:    true
+version:         1
+...

.cache/clang/ModuleCache/_Concurrency-IW47C06QYY26.swiftmodule

@@ -0,0 +1,16 @@
+---
+path:            '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx/prebuilt-modules/26.0/_Concurrency.swiftmodule/arm64e-apple-macos.swiftmodule'
+dependencies:
+  - mtime:           1757258669000000000
+    path:            '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx/prebuilt-modules/26.0/_Concurrency.swiftmodule/arm64e-apple-macos.swiftmodule'
+    size:            699544
+  - mtime:           1754189697000000000
+    path:            'usr/lib/swift/Swift.swiftmodule/arm64e-apple-macos.swiftinterface'
+    size:            2261306
+    sdk_relative:    true
+  - mtime:           1754192470000000000
+    path:            'usr/lib/swift/_Concurrency.swiftmodule/arm64e-apple-macos.swiftinterface'
+    size:            364219
+    sdk_relative:    true
+version:         1
+...

.cache/clang/ModuleCache/_StringProcessing-1C2ZFCSIKDXY1.swiftmodule

@@ -0,0 +1,16 @@
+---
+path:            '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx/prebuilt-modules/26.0/_StringProcessing.swiftmodule/arm64e-apple-macos.swiftmodule'
+dependencies:
+  - mtime:           1757258664000000000
+    path:            '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx/prebuilt-modules/26.0/_StringProcessing.swiftmodule/arm64e-apple-macos.swiftmodule'
+    size:            83568
+  - mtime:           1754189697000000000
+    path:            'usr/lib/swift/Swift.swiftmodule/arm64e-apple-macos.swiftinterface'
+    size:            2261306
+    sdk_relative:    true
+  - mtime:           1754192532000000000
+    path:            'usr/lib/swift/_StringProcessing.swiftmodule/arm64e-apple-macos.swiftinterface'
+    size:            24507
+    sdk_relative:    true
+version:         1
+...

.gitignore

@@ -66,9 +66,6 @@ __pycache__/
 *.tmp
 *.temp
 
-## Cache
-.cache/
-
 # Local build results
 .Result*/
 .Result*.xcresult/

Configs/Release.xcconfig

@@ -1,4 +1,4 @@
-MARKETING_VERSION = 1.5.0
+MARKETING_VERSION = 1.4.4
 CURRENT_PROJECT_VERSION = 1
 
 IPHONEOS_DEPLOYMENT_TARGET = 16.0

Justfile

@@ -14,11 +14,8 @@ default:
 # Check prerequisites
 check:
     @echo "Checking prerequisites..."
-    @command -v xcodebuild >/dev/null 2>&1 || (echo "❌ xcodebuild not found. Install Xcode from App Store" && exit 1)
+    @command -v xcodebuild >/dev/null 2>&1 || (echo "❌ Xcode not found. Install Xcode from App Store" && exit 1)
-    @xcode-select -p | grep -q "Xcode.app" || (echo "❌ Full Xcode required, not just command line tools. Install from App Store and run:\n   sudo xcode-select -s /Applications/Xcode.app/Contents/Developer" && exit 1)
+    @security find-identity -v -p codesigning | grep -q "Developer ID" || (echo "⚠️  No Developer ID found - code signing may fail" && exit 0)
-    @test -d "/Applications/Xcode.app" || (echo "❌ Xcode.app not found in Applications folder. Install from App Store" && exit 1)
-    @xcodebuild -version >/dev/null 2>&1 || (echo "❌ Xcode not properly configured. Try:\n   sudo xcode-select -s /Applications/Xcode.app/Contents/Developer" && exit 1)
-    @security find-identity -v -p codesigning | grep -q "Apple Development\|Developer ID" || (echo "⚠️  No Developer ID found - code signing may fail" && exit 0)
     @echo "✅ All prerequisites met"
 
 # Backup original files

Package.swift

@@ -6,7 +6,7 @@ let package = Package(
     name: "bitchat",
     defaultLocalization: "en",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v17),
         .macOS(.v13)
     ],
     products: [

bitchat.xcodeproj/project.pbxproj

@@ -312,7 +312,6 @@
 				ne,
 				"pt-BR",
 				ru,
-				tr,
 				uk,
 				"zh-Hans",
 			);

bitchat/Assets.xcassets/AppIconDebug.appiconset/Contents.json

@@ -13,6 +13,7 @@
           "value" : "dark"
         }
       ],
+      "filename" : "image-1024 1.png",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"
@@ -24,6 +25,7 @@
           "value" : "tinted"
         }
       ],
+      "filename" : "image-1024 2.png",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"

bitchat/BitchatApp.swift

@@ -26,15 +26,11 @@ struct BitchatApp: App {
     @NSApplicationDelegateAdaptor(MacAppDelegate.self) var appDelegate
     #endif
     
-    private let idBridge = NostrIdentityBridge()
-    
     init() {
         let keychain = KeychainManager()
-        let idBridge = self.idBridge
         _chatViewModel = StateObject(
             wrappedValue: ChatViewModel(
                 keychain: keychain,
-                idBridge: idBridge,
                 identityManager: SecureIdentityStateManager(keychain)
             )
         )
@@ -54,7 +50,7 @@ struct BitchatApp: App {
                     VerificationService.shared.configure(with: chatViewModel.meshService.getNoiseService())
                     // Prewarm Nostr identity and QR to make first VERIFY sheet fast
                     DispatchQueue.global(qos: .utility).async {
-                        let npub = try? idBridge.getCurrentNostrIdentity()?.npub
+                        let npub = try? NostrIdentityBridge.getCurrentNostrIdentity()?.npub
                         _ = VerificationService.shared.buildMyQRString(nickname: chatViewModel.nickname, npub: npub)
                     }
                     #if os(iOS)
@@ -221,7 +217,7 @@ final class NotificationDelegate: NSObject, UNUserNotificationCenterDelegate {
             // Get peer ID from userInfo
             if let peerID = userInfo["peerID"] as? String {
                 DispatchQueue.main.async {
-                    self.chatViewModel?.startPrivateChat(with: PeerID(str: peerID))
+                    self.chatViewModel?.startPrivateChat(with: peerID)
                 }
             }
         }

bitchat/Features/media/ImageUtils.swift

@@ -1,203 +0,0 @@
-import Foundation
-import ImageIO
-import UniformTypeIdentifiers
-#if os(iOS)
-import UIKit
-#else
-import AppKit
-#endif
-
-enum ImageUtilsError: Error {
-    case invalidImage
-    case encodingFailed
-}
-
-enum ImageUtils {
-    private static let compressionQuality: CGFloat = 0.85
-    private static let targetImageBytes: Int = 60_000
-
-    static func processImage(at url: URL, maxDimension: CGFloat = 512) throws -> URL {
-        // Security H1: Check file size BEFORE reading into memory
-        let attrs = try FileManager.default.attributesOfItem(atPath: url.path)
-        guard let fileSize = attrs[.size] as? Int else {
-            throw ImageUtilsError.invalidImage
-        }
-        // Allow up to 10MB source images (will be scaled down)
-        guard fileSize <= 10 * 1024 * 1024 else {
-            throw ImageUtilsError.invalidImage
-        }
-
-        let data = try Data(contentsOf: url)
-        #if os(iOS)
-        guard let image = UIImage(data: data) else { throw ImageUtilsError.invalidImage }
-        return try processImage(image, maxDimension: maxDimension)
-        #else
-        guard let image = NSImage(data: data) else { throw ImageUtilsError.invalidImage }
-        return try processImage(image, maxDimension: maxDimension)
-        #endif
-    }
-
-    #if os(iOS)
-    static func processImage(_ image: UIImage, maxDimension: CGFloat = 512) throws -> URL {
-        return try autoreleasepool {
-            // Scale the image first
-            let scaled = scaledImage(image, maxDimension: maxDimension)
-
-            // Get CGImage from UIImage - this is the key to stripping metadata
-            guard let cgImage = scaled.cgImage else {
-                throw ImageUtilsError.encodingFailed
-            }
-
-            // Use CGImageDestination to encode without metadata (same as macOS)
-            var quality = compressionQuality
-            guard var jpegData = encodeJPEG(from: cgImage, quality: quality) else {
-                throw ImageUtilsError.encodingFailed
-            }
-
-            // Compress to target size
-            while jpegData.count > targetImageBytes && quality > 0.3 {
-                quality -= 0.1
-                autoreleasepool {
-                    if let next = encodeJPEG(from: cgImage, quality: quality) {
-                        jpegData = next
-                    }
-                }
-            }
-
-            let outputURL = try makeOutputURL()
-            try jpegData.write(to: outputURL, options: .atomic)
-            return outputURL
-        }
-    }
-
-    private static func scaledImage(_ image: UIImage, maxDimension: CGFloat) -> UIImage {
-        let size = image.size
-        let maxSide = max(size.width, size.height)
-        guard maxSide > maxDimension else { return image }
-        let scale = maxDimension / maxSide
-        let newSize = CGSize(width: size.width * scale, height: size.height * scale)
-
-        // Draw into a new context to get a clean CGImage without metadata
-        UIGraphicsBeginImageContextWithOptions(newSize, true, 1.0)
-        image.draw(in: CGRect(origin: .zero, size: newSize))
-        let rendered = UIGraphicsGetImageFromCurrentImageContext()
-        UIGraphicsEndImageContext()
-        return rendered ?? image
-    }
-
-    // Shared EXIF-stripping JPEG encoder for both iOS and macOS
-    private static func encodeJPEG(from cgImage: CGImage, quality: CGFloat) -> Data? {
-        guard let data = CFDataCreateMutable(nil, 0) else {
-            return nil
-        }
-        guard let destination = CGImageDestinationCreateWithData(data, UTType.jpeg.identifier as CFString, 1, nil) else {
-            return nil
-        }
-        // Security: Strip ALL metadata (EXIF, GPS, TIFF, IPTC, XMP)
-        // By only specifying compression quality and no metadata keys,
-        // we ensure a clean JPEG with no privacy-leaking information
-        let options: [CFString: Any] = [
-            kCGImageDestinationLossyCompressionQuality: quality
-        ]
-        CGImageDestinationAddImage(destination, cgImage, options as CFDictionary)
-        guard CGImageDestinationFinalize(destination) else {
-            return nil
-        }
-        return data as Data
-    }
-    #else
-    static func processImage(_ image: NSImage, maxDimension: CGFloat = 512) throws -> URL {
-        return try autoreleasepool {
-            let scaled = scaledImage(image, maxDimension: maxDimension)
-            guard let inputCG = scaled.cgImage(forProposedRect: nil, context: nil, hints: nil) else {
-                throw ImageUtilsError.encodingFailed
-            }
-            let width = inputCG.width
-            let height = inputCG.height
-            let colorSpace = CGColorSpace(name: CGColorSpace.sRGB) ?? CGColorSpaceCreateDeviceRGB()
-            guard let context = CGContext(
-                data: nil,
-                width: width,
-                height: height,
-                bitsPerComponent: 8,
-                bytesPerRow: 0,
-                space: colorSpace,
-                bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue
-            ) else {
-                throw ImageUtilsError.encodingFailed
-            }
-            context.draw(inputCG, in: CGRect(x: 0, y: 0, width: width, height: height))
-            guard let cgImage = context.makeImage() else {
-                throw ImageUtilsError.encodingFailed
-            }
-            var quality = compressionQuality
-            guard var jpegData = encodeJPEG(from: cgImage, quality: quality) else {
-                throw ImageUtilsError.encodingFailed
-            }
-            while jpegData.count > targetImageBytes && quality > 0.3 {
-                quality -= 0.1
-                autoreleasepool {
-                    if let next = encodeJPEG(from: cgImage, quality: quality) {
-                        jpegData = next
-                    }
-                }
-            }
-            let outputURL = try makeOutputURL()
-            try jpegData.write(to: outputURL, options: .atomic)
-            return outputURL
-        }
-    }
-
-    private static func scaledImage(_ image: NSImage, maxDimension: CGFloat) -> NSImage {
-        let size = image.size
-        let maxSide = max(size.width, size.height)
-        guard maxSide > maxDimension else { return image }
-        let scale = maxDimension / maxSide
-        let newSize = NSSize(width: size.width * scale, height: size.height * scale)
-        let scaledImage = NSImage(size: newSize)
-        scaledImage.lockFocus()
-        image.draw(in: NSRect(origin: .zero, size: newSize),
-                   from: NSRect(origin: .zero, size: size),
-                   operation: .copy,
-                   fraction: 1.0)
-        scaledImage.unlockFocus()
-        return scaledImage
-    }
-
-    // Shared EXIF-stripping JPEG encoder for both iOS and macOS
-    private static func encodeJPEG(from cgImage: CGImage, quality: CGFloat) -> Data? {
-        guard let data = CFDataCreateMutable(nil, 0) else {
-            return nil
-        }
-        guard let destination = CGImageDestinationCreateWithData(data, UTType.jpeg.identifier as CFString, 1, nil) else {
-            return nil
-        }
-        // Security: Strip ALL metadata (EXIF, GPS, TIFF, IPTC, XMP)
-        // By only specifying compression quality and no metadata keys,
-        // we ensure a clean JPEG with no privacy-leaking information
-        let options: [CFString: Any] = [
-            kCGImageDestinationLossyCompressionQuality: quality
-        ]
-        CGImageDestinationAddImage(destination, cgImage, options as CFDictionary)
-        guard CGImageDestinationFinalize(destination) else {
-            return nil
-        }
-        return data as Data
-    }
-    #endif
-
-    private static func makeOutputURL() throws -> URL {
-        let formatter = DateFormatter()
-        formatter.dateFormat = "yyyyMMdd_HHmmss"
-        let fileName = "img_\(formatter.string(from: Date())).jpg"
-
-        let directory = try applicationFilesDirectory().appendingPathComponent("images/outgoing", isDirectory: true)
-        try FileManager.default.createDirectory(at: directory, withIntermediateDirectories: true, attributes: nil)
-        return directory.appendingPathComponent(fileName)
-    }
-
-    private static func applicationFilesDirectory() throws -> URL {
-        let base = try FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
-        return base.appendingPathComponent("files", isDirectory: true)
-    }
-}

bitchat/Features/voice/VoiceNotePlaybackController.swift

@@ -1,193 +0,0 @@
-import Foundation
-import AVFoundation
-import BitLogger
-
-/// Controls playback for a single voice note and coordinates exclusive playback across the app.
-final class VoiceNotePlaybackController: NSObject, ObservableObject, AVAudioPlayerDelegate {
-    @Published private(set) var isPlaying: Bool = false
-    @Published private(set) var currentTime: TimeInterval = 0
-    @Published private(set) var duration: TimeInterval = 0
-    @Published private(set) var progress: Double = 0
-
-    private var player: AVAudioPlayer?
-    private var timer: Timer?
-    private var url: URL
-
-    init(url: URL) {
-        self.url = url
-        super.init()
-        // Don't load anything eagerly - wait until user interaction or view is fully displayed
-    }
-
-    func loadDuration() {
-        guard duration == 0 else { return }
-
-        DispatchQueue.global(qos: .utility).async { [weak self] in
-            guard let self = self else { return }
-            do {
-                let player = try AVAudioPlayer(contentsOf: self.url)
-                let loadedDuration = player.duration
-                DispatchQueue.main.async { [weak self] in
-                    guard let self = self, self.duration == 0 else { return }
-                    self.duration = loadedDuration
-                }
-            } catch {
-                SecureLogger.error("Failed to load audio duration: \(error)", category: .session)
-            }
-        }
-    }
-
-    deinit {
-        timer?.invalidate()
-    }
-
-    func replaceURL(_ url: URL) {
-        guard url != self.url else { return }
-        stop()
-        self.url = url
-        player = nil
-        duration = 0
-        // Duration will be loaded on demand when needed
-    }
-
-    func togglePlayback() {
-        isPlaying ? pause() : play()
-    }
-
-    func play() {
-        guard ensurePlayerReady() else { return }
-        VoiceNotePlaybackCoordinator.shared.activate(self)
-        player?.play()
-        startTimer()
-        updateProgress()
-        isPlaying = true
-    }
-
-    func pause() {
-        player?.pause()
-        stopTimer()
-        updateProgress()
-        isPlaying = false
-    }
-
-    func stop() {
-        player?.stop()
-        player?.currentTime = 0
-        stopTimer()
-        updateProgress()
-        isPlaying = false
-        VoiceNotePlaybackCoordinator.shared.deactivate(self)
-    }
-
-    func seek(to fraction: Double) {
-        guard ensurePlayerReady() else { return }
-        let clamped = max(0, min(1, fraction))
-        if let player = player {
-            player.currentTime = clamped * player.duration
-            if isPlaying {
-                player.play()
-            }
-            updateProgress()
-        }
-    }
-
-    // MARK: - AVAudioPlayerDelegate
-
-    func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
-        // Delegate callback may be on background thread - ensure main thread for UI updates
-        DispatchQueue.main.async { [weak self] in
-            guard let self = self else { return }
-            self.stopTimer()
-            self.updateProgress()
-            self.isPlaying = false
-            VoiceNotePlaybackCoordinator.shared.deactivate(self)
-        }
-    }
-
-    // MARK: - Private Helpers
-
-    private func preparePlayer(for url: URL) {
-        // Prepare player synchronously (only called when playback is requested)
-        do {
-            let player = try AVAudioPlayer(contentsOf: url)
-            player.delegate = self
-            player.prepareToPlay()
-            self.player = player
-            duration = player.duration
-            currentTime = player.currentTime
-            progress = duration > 0 ? currentTime / duration : 0
-        } catch {
-            SecureLogger.error("Voice note playback failed for \(url.lastPathComponent): \(error)", category: .session)
-            player = nil
-            duration = 0
-            currentTime = 0
-            progress = 0
-        }
-    }
-
-    private func ensurePlayerReady() -> Bool {
-        if player == nil {
-            preparePlayer(for: url)
-        }
-        #if os(iOS)
-        let session = AVAudioSession.sharedInstance()
-        do {
-            try session.setCategory(.playback, mode: .spokenAudio, options: [.mixWithOthers])
-            try session.setActive(true, options: [])
-        } catch {
-            SecureLogger.error("Failed to activate audio session: \(error)", category: .session)
-        }
-        #endif
-        return player != nil
-    }
-
-    private func startTimer() {
-        if timer != nil { return }
-        timer = Timer.scheduledTimer(withTimeInterval: 0.05, repeats: true) { [weak self] _ in
-            self?.updateProgress()
-        }
-        if let timer = timer {
-            RunLoop.main.add(timer, forMode: .common)
-        }
-    }
-
-    private func stopTimer() {
-        timer?.invalidate()
-        timer = nil
-    }
-
-    private func updateProgress() {
-        guard let player = player else {
-            currentTime = 0
-            duration = 0
-            progress = 0
-            return
-        }
-        currentTime = player.currentTime
-        duration = player.duration
-        progress = duration > 0 ? currentTime / duration : 0
-    }
-}
-
-/// Ensures only one voice note plays at a time.
-final class VoiceNotePlaybackCoordinator {
-    static let shared = VoiceNotePlaybackCoordinator()
-
-    private weak var activeController: VoiceNotePlaybackController?
-
-    private init() {}
-
-    func activate(_ controller: VoiceNotePlaybackController) {
-        if activeController === controller {
-            return
-        }
-        activeController?.pause()
-        activeController = controller
-    }
-
-    func deactivate(_ controller: VoiceNotePlaybackController) {
-        if activeController === controller {
-            activeController = nil
-        }
-    }
-}

bitchat/Features/voice/VoiceRecorder.swift

@@ -1,169 +0,0 @@
-import Foundation
-import AVFoundation
-
-/// Manages audio capture for mesh voice notes with predictable encoding settings.
-/// Recording runs on an internal serial queue to avoid AVAudioSession contention.
-final class VoiceRecorder: NSObject, AVAudioRecorderDelegate {
-    enum RecorderError: Error {
-        case microphoneAccessDenied
-        case recorderInitializationFailed
-        case recordingInProgress
-    }
-
-    static let shared = VoiceRecorder()
-
-    private let queue = DispatchQueue(label: "com.bitchat.voice-recorder")
-    private let paddingInterval: TimeInterval = 0.5
-
-    private var recorder: AVAudioRecorder?
-    private var currentURL: URL?
-    private var stopWorkItem: DispatchWorkItem?
-
-    private override init() {
-        super.init()
-    }
-
-    // MARK: - Permissions
-
-    @discardableResult
-    func requestPermission() async -> Bool {
-        #if os(iOS)
-        return await withCheckedContinuation { continuation in
-            AVAudioSession.sharedInstance().requestRecordPermission { granted in
-                continuation.resume(returning: granted)
-            }
-        }
-        #elseif os(macOS)
-        return await withCheckedContinuation { continuation in
-            AVCaptureDevice.requestAccess(for: .audio) { granted in
-                continuation.resume(returning: granted)
-            }
-        }
-        #else
-        return true
-        #endif
-    }
-
-    // MARK: - Recording Lifecycle
-
-    func startRecording() throws -> URL {
-        try queue.sync {
-            if recorder?.isRecording == true {
-                throw RecorderError.recordingInProgress
-            }
-
-            #if os(iOS)
-            let session = AVAudioSession.sharedInstance()
-            guard session.recordPermission == .granted else {
-                throw RecorderError.microphoneAccessDenied
-            }
-            try session.setCategory(
-                .playAndRecord,
-                mode: .default,
-                options: [.defaultToSpeaker, .allowBluetoothA2DP, .allowBluetoothHFP]
-            )
-            try session.setActive(true, options: .notifyOthersOnDeactivation)
-            #endif
-            #if os(macOS)
-            guard AVCaptureDevice.authorizationStatus(for: .audio) == .authorized else {
-                throw RecorderError.microphoneAccessDenied
-            }
-            #endif
-
-            let outputURL = try makeOutputURL()
-            let settings: [String: Any] = [
-                AVFormatIDKey: kAudioFormatMPEG4AAC,
-                AVSampleRateKey: 16_000,
-                AVNumberOfChannelsKey: 1,
-                AVEncoderBitRateKey: 20_000
-            ]
-
-            let audioRecorder = try AVAudioRecorder(url: outputURL, settings: settings)
-            audioRecorder.delegate = self
-            audioRecorder.isMeteringEnabled = true
-            audioRecorder.prepareToRecord()
-            audioRecorder.record()
-
-            recorder = audioRecorder
-            currentURL = outputURL
-            stopWorkItem?.cancel()
-            stopWorkItem = nil
-            return outputURL
-        }
-    }
-
-    func stopRecording(completion: @escaping (URL?) -> Void) {
-        queue.async { [weak self] in
-            guard let self = self, let recorder = self.recorder, recorder.isRecording else {
-                completion(self?.currentURL)
-                return
-            }
-
-            let item = DispatchWorkItem { [weak self] in
-                guard let self = self else { return }
-                recorder.stop()
-                self.cleanupSession()
-                let url = self.currentURL
-                self.recorder = nil
-                self.currentURL = url
-                completion(url)
-            }
-            self.stopWorkItem = item
-            self.queue.asyncAfter(deadline: .now() + self.paddingInterval, execute: item)
-        }
-    }
-
-    func cancelRecording() {
-        queue.async { [weak self] in
-            guard let self = self else { return }
-            self.stopWorkItem?.cancel()
-            self.stopWorkItem = nil
-            if let recorder = self.recorder, recorder.isRecording {
-                recorder.stop()
-            }
-            self.cleanupSession()
-            if let url = self.currentURL {
-                try? FileManager.default.removeItem(at: url)
-            }
-            self.recorder = nil
-            self.currentURL = nil
-        }
-    }
-
-    // MARK: - Metering
-
-    func currentAveragePower() -> Float {
-        queue.sync {
-            recorder?.updateMeters()
-            return recorder?.averagePower(forChannel: 0) ?? -160
-        }
-    }
-
-    // MARK: - Helpers
-
-    private func makeOutputURL() throws -> URL {
-        let formatter = DateFormatter()
-        formatter.dateFormat = "yyyyMMdd_HHmmss"
-        let fileName = "voice_\(formatter.string(from: Date())).m4a"
-
-        let baseDirectory = try applicationFilesDirectory().appendingPathComponent("voicenotes/outgoing", isDirectory: true)
-        try FileManager.default.createDirectory(at: baseDirectory, withIntermediateDirectories: true, attributes: nil)
-        return baseDirectory.appendingPathComponent(fileName)
-    }
-
-    private func applicationFilesDirectory() throws -> URL {
-        #if os(iOS)
-        return try FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
-            .appendingPathComponent("files", isDirectory: true)
-        #else
-        let base = try FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
-        return base.appendingPathComponent("files", isDirectory: true)
-        #endif
-    }
-
-    private func cleanupSession() {
-        #if os(iOS)
-        try? AVAudioSession.sharedInstance().setActive(false, options: .notifyOthersOnDeactivation)
-        #endif
-    }
-}

bitchat/Features/voice/Waveform.swift

@@ -1,113 +0,0 @@
-import AVFoundation
-import Foundation
-import BitLogger
-
-/// Generates and caches downsampled waveforms for audio files so UI rendering is cheap.
-final class WaveformCache {
-    static let shared = WaveformCache()
-
-    private let queue = DispatchQueue(label: "com.bitchat.waveform-cache", attributes: .concurrent)
-    private var cache: [URL: (waveform: [Float], lastAccess: Date)] = [:]
-    private let maxCacheSize = 20  // Limit cache to prevent unbounded memory growth
-
-    private init() {}
-
-    func cachedWaveform(for url: URL) -> [Float]? {
-        queue.sync {
-            guard let entry = cache[url] else { return nil }
-            return entry.waveform
-        }
-    }
-
-    func waveform(for url: URL, bins: Int = 120, completion: @escaping ([Float]) -> Void) {
-        queue.async { [weak self] in
-            guard let self = self else { return }
-
-            // Check cache (read-only, no update needed on cache hit for performance)
-            if let entry = self.cache[url] {
-                DispatchQueue.main.async { completion(entry.waveform) }
-                return
-            }
-
-            guard let computed = self.computeWaveform(url: url, bins: bins) else {
-                DispatchQueue.main.async { completion([]) }
-                return
-            }
-
-            self.queue.async(flags: .barrier) { [weak self] in
-                guard let self = self else { return }
-
-                // Evict oldest entry if cache is full
-                if self.cache.count >= self.maxCacheSize {
-                    if let oldest = self.cache.min(by: { $0.value.lastAccess < $1.value.lastAccess }) {
-                        self.cache.removeValue(forKey: oldest.key)
-                    }
-                }
-
-                self.cache[url] = (computed, Date())
-            }
-            DispatchQueue.main.async { completion(computed) }
-        }
-    }
-
-    func purge(url: URL) {
-        queue.async(flags: .barrier) { [weak self] in
-            self?.cache.removeValue(forKey: url)
-        }
-    }
-
-    func purgeAll() {
-        queue.async(flags: .barrier) { [weak self] in
-            self?.cache.removeAll()
-        }
-    }
-
-    private func computeWaveform(url: URL, bins: Int) -> [Float]? {
-        guard bins > 0 else { return nil }
-        // Use autoreleasepool to manage memory from audio buffer allocations
-        return autoreleasepool {
-            do {
-                let audioFile = try AVAudioFile(forReading: url)
-                let length = Int(audioFile.length)
-                guard length > 0 else { return nil }
-
-                guard let buffer = AVAudioPCMBuffer(pcmFormat: audioFile.processingFormat, frameCapacity: AVAudioFrameCount(length)) else {
-                    return nil
-                }
-                try audioFile.read(into: buffer, frameCount: AVAudioFrameCount(length))
-                guard let channelData = buffer.floatChannelData else { return nil }
-
-                let channelCount = Int(audioFile.processingFormat.channelCount)
-                let frameLength = Int(buffer.frameLength)
-                let samplesPerBin = max(1, frameLength / bins)
-
-                var magnitudes: [Float] = Array(repeating: 0, count: bins)
-                for bin in 0..<bins {
-                    let start = bin * samplesPerBin
-                    let end = min(frameLength, start + samplesPerBin)
-                    if start >= end { break }
-
-                    var sum: Float = 0
-                    var sampleCount = 0
-                    for frame in start..<end {
-                        var sampleValue: Float = 0
-                        for channel in 0..<channelCount {
-                            sampleValue += fabsf(channelData[channel][frame])
-                        }
-                        sum += sampleValue / Float(channelCount)
-                        sampleCount += 1
-                    }
-                    magnitudes[bin] = sampleCount > 0 ? sum / Float(sampleCount) : 0
-                }
-
-                if let maxMagnitude = magnitudes.max(), maxMagnitude > 0 {
-                    magnitudes = magnitudes.map { min($0 / maxMagnitude, 1.0) }
-                }
-                return magnitudes
-            } catch {
-                SecureLogger.error("Waveform extraction failed for \(url.lastPathComponent): \(error)", category: .session)
-                return nil
-            }
-        }
-    }
-}

bitchat/Info.plist

@@ -37,10 +37,6 @@
 	<string>bitchat uses Bluetooth to discover and connect with other bitchat users nearby.</string>
 	<key>NSCameraUsageDescription</key>
 	<string>bitchat uses the camera to scan QR codes to verify peers.</string>
-	<key>NSPhotoLibraryUsageDescription</key>
-	<string>bitchat lets you pick images from your photo library to share with nearby peers.</string>
-	<key>NSMicrophoneUsageDescription</key>
-	<string>bitchat uses the microphone to record voice notes that relay across the mesh.</string>
 	<key>NSLocationWhenInUseUsageDescription</key>
 	<string>bitchat uses your approximate location to compute local geohash channels for optional public chats. Exact GPS is never shared.</string>
 	<key>UIBackgroundModes</key>

bitchat/Models/BitchatMessage.swift

@@ -335,6 +335,20 @@ extension BitchatMessage {
     }
 }
 
+// MARK: - System Message Factory
+
+extension BitchatMessage {
+    /// Creates a system message with default values
+    static func system(_ content: String, timestamp: Date = Date()) -> BitchatMessage {
+        return BitchatMessage(
+            sender: "system",
+            content: content,
+            timestamp: timestamp,
+            isRelay: false
+        )
+    }
+}
+
 extension Array where Element == BitchatMessage {
     /// Filters out empty ones and deduplicate by ID while preserving order (from oldest to newest)
     func cleanedAndDeduped() -> [Element] {

bitchat/Models/BitchatPacket.swift

@@ -22,8 +22,8 @@ struct BitchatPacket: Codable {
     var signature: Data?
     var ttl: UInt8
     
-    init(type: UInt8, senderID: Data, recipientID: Data?, timestamp: UInt64, payload: Data, signature: Data?, ttl: UInt8, version: UInt8 = 1) {
+    init(type: UInt8, senderID: Data, recipientID: Data?, timestamp: UInt64, payload: Data, signature: Data?, ttl: UInt8) {
-        self.version = version
+        self.version = 1
         self.type = type
         self.senderID = senderID
         self.recipientID = recipientID
@@ -80,8 +80,7 @@ struct BitchatPacket: Codable {
             timestamp: timestamp,
             payload: payload,
             signature: nil, // Remove signature for signing
-            ttl: 0, // Use fixed TTL=0 for signing to ensure relay compatibility
+            ttl: 0 // Use fixed TTL=0 for signing to ensure relay compatibility
-            version: version
         )
         return BinaryProtocol.encode(unsignedPacket)
     }

bitchat/Models/GeoPerson.swift

@@ -0,0 +1,16 @@
+//
+// GeoPerson.swift
+// bitchat
+//
+// Model representing a participant in a geohash channel
+// This is free and unencumbered software released into the public domain.
+//
+
+import Foundation
+
+/// Represents a person participating in a geohash-based location channel
+struct GeoPerson: Identifiable, Equatable {
+    let id: String        // pubkey hex (lowercased)
+    let displayName: String
+    let lastSeen: Date
+}

bitchat/Models/PeerID.swift

@@ -161,14 +161,9 @@ extension PeerID {
                 id.rangeOfCharacter(from: validCharset.inverted) == nil
     }
     
-    /// Returns true if the `bare` id is all hex
-    var isHex: Bool {
-        bare.allSatisfy { $0.isHexDigit }
-    }
-    
     /// Short routing IDs (exact 16-hex)
     var isShort: Bool {
-        bare.count == Constants.hexIDLength && isHex
+        bare.count == Constants.hexIDLength && Data(hexString: bare) != nil
     }
     
     /// Full Noise key hex (exact 64-hex)

bitchat/Noise/NoiseProtocol.swift

@@ -767,7 +767,7 @@ final class NoiseHandshakeState {
             let shared = try localStatic.sharedSecretFromKeyAgreement(with: remoteStatic)
             symmetricState.mixKey(shared.withUnsafeBytes { Data($0) })
             
-        case .e, .s:
+        default:
             break
         }
     }

bitchat/Noise/NoiseRateLimiter.swift

@@ -1,95 +0,0 @@
-//
-// NoiseRateLimiter.swift
-// bitchat
-//
-// This is free and unencumbered software released into the public domain.
-// For more information, see <https://unlicense.org>
-//
-
-import BitLogger
-import Foundation
-
-final class NoiseRateLimiter {
-    private var handshakeTimestamps: [PeerID: [Date]] = [:]
-    private var messageTimestamps: [PeerID: [Date]] = [:]
-    
-    // Global rate limiting
-    private var globalHandshakeTimestamps: [Date] = []
-    private var globalMessageTimestamps: [Date] = []
-    
-    private let queue = DispatchQueue(label: "chat.bitchat.noise.ratelimit", attributes: .concurrent)
-    
-    func allowHandshake(from peerID: PeerID) -> Bool {
-        return queue.sync(flags: .barrier) {
-            let now = Date()
-            let oneMinuteAgo = now.addingTimeInterval(-60)
-            
-            // Check global rate limit first
-            globalHandshakeTimestamps = globalHandshakeTimestamps.filter { $0 > oneMinuteAgo }
-            if globalHandshakeTimestamps.count >= NoiseSecurityConstants.maxGlobalHandshakesPerMinute {
-                SecureLogger.warning("Global handshake rate limit exceeded: \(globalHandshakeTimestamps.count)/\(NoiseSecurityConstants.maxGlobalHandshakesPerMinute) per minute", category: .security)
-                return false
-            }
-            
-            // Check per-peer rate limit
-            var timestamps = handshakeTimestamps[peerID] ?? []
-            timestamps = timestamps.filter { $0 > oneMinuteAgo }
-            
-            if timestamps.count >= NoiseSecurityConstants.maxHandshakesPerMinute {
-                SecureLogger.warning("Per-peer handshake rate limit exceeded for \(peerID): \(timestamps.count)/\(NoiseSecurityConstants.maxHandshakesPerMinute) per minute", category: .security)
-                return false
-            }
-            
-            // Record new handshake
-            timestamps.append(now)
-            handshakeTimestamps[peerID] = timestamps
-            globalHandshakeTimestamps.append(now)
-            return true
-        }
-    }
-    
-    func allowMessage(from peerID: PeerID) -> Bool {
-        return queue.sync(flags: .barrier) {
-            let now = Date()
-            let oneSecondAgo = now.addingTimeInterval(-1)
-            
-            // Check global rate limit first
-            globalMessageTimestamps = globalMessageTimestamps.filter { $0 > oneSecondAgo }
-            if globalMessageTimestamps.count >= NoiseSecurityConstants.maxGlobalMessagesPerSecond {
-                SecureLogger.warning("Global message rate limit exceeded: \(globalMessageTimestamps.count)/\(NoiseSecurityConstants.maxGlobalMessagesPerSecond) per second", category: .security)
-                return false
-            }
-            
-            // Check per-peer rate limit
-            var timestamps = messageTimestamps[peerID] ?? []
-            timestamps = timestamps.filter { $0 > oneSecondAgo }
-            
-            if timestamps.count >= NoiseSecurityConstants.maxMessagesPerSecond {
-                SecureLogger.warning("Per-peer message rate limit exceeded for \(peerID): \(timestamps.count)/\(NoiseSecurityConstants.maxMessagesPerSecond) per second", category: .security)
-                return false
-            }
-            
-            // Record new message
-            timestamps.append(now)
-            messageTimestamps[peerID] = timestamps
-            globalMessageTimestamps.append(now)
-            return true
-        }
-    }
-    
-    func reset(for peerID: PeerID) {
-        queue.async(flags: .barrier) {
-            self.handshakeTimestamps.removeValue(forKey: peerID)
-            self.messageTimestamps.removeValue(forKey: peerID)
-        }
-    }
-
-    func resetAll() {
-        queue.async(flags: .barrier) {
-            self.handshakeTimestamps.removeAll()
-            self.messageTimestamps.removeAll()
-            self.globalHandshakeTimestamps.removeAll()
-            self.globalMessageTimestamps.removeAll()
-        }
-    }
-}

bitchat/Noise/NoiseSecurityConsiderations.swift

@@ -0,0 +1,227 @@
+//
+// NoiseSecurityConsiderations.swift
+// bitchat
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import BitLogger
+import Foundation
+
+// MARK: - Security Constants
+
+enum NoiseSecurityConstants {
+    // Maximum message size to prevent memory exhaustion
+    static let maxMessageSize = 65535 // 64KB as per Noise spec
+    
+    // Maximum handshake message size
+    static let maxHandshakeMessageSize = 2048 // 2KB to accommodate XX pattern
+    
+    // Session timeout - sessions older than this should be renegotiated
+    static let sessionTimeout: TimeInterval = 86400 // 24 hours
+    
+    // Maximum number of messages before rekey (2^64 - 1 is the nonce limit)
+    static let maxMessagesPerSession: UInt64 = 1_000_000_000 // 1 billion messages
+    
+    // Handshake timeout - abandon incomplete handshakes
+    static let handshakeTimeout: TimeInterval = 60 // 1 minute
+    
+    // Maximum concurrent sessions per peer
+    static let maxSessionsPerPeer = 3
+    
+    // Rate limiting
+    static let maxHandshakesPerMinute = 10
+    static let maxMessagesPerSecond = 100
+    
+    // Global rate limiting (across all peers)
+    static let maxGlobalHandshakesPerMinute = 30
+    static let maxGlobalMessagesPerSecond = 500
+}
+
+// MARK: - Security Validations
+
+struct NoiseSecurityValidator {
+    
+    /// Validate message size
+    static func validateMessageSize(_ data: Data) -> Bool {
+        return data.count <= NoiseSecurityConstants.maxMessageSize
+    }
+    
+    /// Validate handshake message size
+    static func validateHandshakeMessageSize(_ data: Data) -> Bool {
+        return data.count <= NoiseSecurityConstants.maxHandshakeMessageSize
+    }
+}
+
+// MARK: - Enhanced Noise Session with Security
+
+final class SecureNoiseSession: NoiseSession {
+    private(set) var messageCount: UInt64 = 0
+    private let sessionStartTime = Date()
+    private(set) var lastActivityTime = Date()
+    
+    override func encrypt(_ plaintext: Data) throws -> Data {
+        // Check session age
+        if Date().timeIntervalSince(sessionStartTime) > NoiseSecurityConstants.sessionTimeout {
+            throw NoiseSecurityError.sessionExpired
+        }
+        
+        // Check message count
+        if messageCount >= NoiseSecurityConstants.maxMessagesPerSession {
+            throw NoiseSecurityError.sessionExhausted
+        }
+        
+        // Validate message size
+        guard NoiseSecurityValidator.validateMessageSize(plaintext) else {
+            throw NoiseSecurityError.messageTooLarge
+        }
+        
+        let encrypted = try super.encrypt(plaintext)
+        messageCount += 1
+        lastActivityTime = Date()
+        
+        return encrypted
+    }
+    
+    override func decrypt(_ ciphertext: Data) throws -> Data {
+        // Check session age
+        if Date().timeIntervalSince(sessionStartTime) > NoiseSecurityConstants.sessionTimeout {
+            throw NoiseSecurityError.sessionExpired
+        }
+        
+        // Validate message size
+        guard NoiseSecurityValidator.validateMessageSize(ciphertext) else {
+            throw NoiseSecurityError.messageTooLarge
+        }
+        
+        let decrypted = try super.decrypt(ciphertext)
+        lastActivityTime = Date()
+        
+        return decrypted
+    }
+    
+    func needsRenegotiation() -> Bool {
+        // Check if we've used more than 90% of message limit
+        let messageThreshold = UInt64(Double(NoiseSecurityConstants.maxMessagesPerSession) * 0.9)
+        if messageCount >= messageThreshold {
+            return true
+        }
+        
+        // Check if last activity was more than 30 minutes ago
+        if Date().timeIntervalSince(lastActivityTime) > NoiseSecurityConstants.sessionTimeout {
+            return true
+        }
+        
+        return false
+    }
+    
+    // MARK: - Testing Support
+    #if DEBUG
+    func setLastActivityTimeForTesting(_ date: Date) {
+        lastActivityTime = date
+    }
+    
+    func setMessageCountForTesting(_ count: UInt64) {
+        messageCount = count
+    }
+    #endif
+}
+
+// MARK: - Rate Limiter
+
+final class NoiseRateLimiter {
+    private var handshakeTimestamps: [PeerID: [Date]] = [:]
+    private var messageTimestamps: [PeerID: [Date]] = [:]
+    
+    // Global rate limiting
+    private var globalHandshakeTimestamps: [Date] = []
+    private var globalMessageTimestamps: [Date] = []
+    
+    private let queue = DispatchQueue(label: "chat.bitchat.noise.ratelimit", attributes: .concurrent)
+    
+    func allowHandshake(from peerID: PeerID) -> Bool {
+        return queue.sync(flags: .barrier) {
+            let now = Date()
+            let oneMinuteAgo = now.addingTimeInterval(-60)
+            
+            // Check global rate limit first
+            globalHandshakeTimestamps = globalHandshakeTimestamps.filter { $0 > oneMinuteAgo }
+            if globalHandshakeTimestamps.count >= NoiseSecurityConstants.maxGlobalHandshakesPerMinute {
+                SecureLogger.warning("Global handshake rate limit exceeded: \(globalHandshakeTimestamps.count)/\(NoiseSecurityConstants.maxGlobalHandshakesPerMinute) per minute", category: .security)
+                return false
+            }
+            
+            // Check per-peer rate limit
+            var timestamps = handshakeTimestamps[peerID] ?? []
+            timestamps = timestamps.filter { $0 > oneMinuteAgo }
+            
+            if timestamps.count >= NoiseSecurityConstants.maxHandshakesPerMinute {
+                SecureLogger.warning("Per-peer handshake rate limit exceeded for \(peerID): \(timestamps.count)/\(NoiseSecurityConstants.maxHandshakesPerMinute) per minute", category: .security)
+                return false
+            }
+            
+            // Record new handshake
+            timestamps.append(now)
+            handshakeTimestamps[peerID] = timestamps
+            globalHandshakeTimestamps.append(now)
+            return true
+        }
+    }
+    
+    func allowMessage(from peerID: PeerID) -> Bool {
+        return queue.sync(flags: .barrier) {
+            let now = Date()
+            let oneSecondAgo = now.addingTimeInterval(-1)
+            
+            // Check global rate limit first
+            globalMessageTimestamps = globalMessageTimestamps.filter { $0 > oneSecondAgo }
+            if globalMessageTimestamps.count >= NoiseSecurityConstants.maxGlobalMessagesPerSecond {
+                SecureLogger.warning("Global message rate limit exceeded: \(globalMessageTimestamps.count)/\(NoiseSecurityConstants.maxGlobalMessagesPerSecond) per second", category: .security)
+                return false
+            }
+            
+            // Check per-peer rate limit
+            var timestamps = messageTimestamps[peerID] ?? []
+            timestamps = timestamps.filter { $0 > oneSecondAgo }
+            
+            if timestamps.count >= NoiseSecurityConstants.maxMessagesPerSecond {
+                SecureLogger.warning("Per-peer message rate limit exceeded for \(peerID): \(timestamps.count)/\(NoiseSecurityConstants.maxMessagesPerSecond) per second", category: .security)
+                return false
+            }
+            
+            // Record new message
+            timestamps.append(now)
+            messageTimestamps[peerID] = timestamps
+            globalMessageTimestamps.append(now)
+            return true
+        }
+    }
+    
+    func reset(for peerID: PeerID) {
+        queue.async(flags: .barrier) {
+            self.handshakeTimestamps.removeValue(forKey: peerID)
+            self.messageTimestamps.removeValue(forKey: peerID)
+        }
+    }
+
+    func resetAll() {
+        queue.async(flags: .barrier) {
+            self.handshakeTimestamps.removeAll()
+            self.messageTimestamps.removeAll()
+            self.globalHandshakeTimestamps.removeAll()
+            self.globalMessageTimestamps.removeAll()
+        }
+    }
+}
+
+// MARK: - Security Errors
+
+enum NoiseSecurityError: Error {
+    case sessionExpired
+    case sessionExhausted
+    case messageTooLarge
+    case invalidPeerID
+    case rateLimitExceeded
+    case handshakeTimeout
+}

bitchat/Noise/NoiseSecurityConstants.swift

@@ -1,37 +0,0 @@
-//
-// NoiseSecurityConstants.swift
-// bitchat
-//
-// This is free and unencumbered software released into the public domain.
-// For more information, see <https://unlicense.org>
-//
-
-import Foundation
-
-enum NoiseSecurityConstants {
-    // Maximum message size to prevent memory exhaustion
-    static let maxMessageSize = 65535 // 64KB as per Noise spec
-    
-    // Maximum handshake message size
-    static let maxHandshakeMessageSize = 2048 // 2KB to accommodate XX pattern
-    
-    // Session timeout - sessions older than this should be renegotiated
-    static let sessionTimeout: TimeInterval = 86400 // 24 hours
-    
-    // Maximum number of messages before rekey (2^64 - 1 is the nonce limit)
-    static let maxMessagesPerSession: UInt64 = 1_000_000_000 // 1 billion messages
-    
-    // Handshake timeout - abandon incomplete handshakes
-    static let handshakeTimeout: TimeInterval = 60 // 1 minute
-    
-    // Maximum concurrent sessions per peer
-    static let maxSessionsPerPeer = 3
-    
-    // Rate limiting
-    static let maxHandshakesPerMinute = 10
-    static let maxMessagesPerSecond = 100
-    
-    // Global rate limiting (across all peers)
-    static let maxGlobalHandshakesPerMinute = 30
-    static let maxGlobalMessagesPerSecond = 500
-}

bitchat/Noise/NoiseSecurityError.swift

@@ -1,18 +0,0 @@
-//
-// NoiseSecurityError.swift
-// bitchat
-//
-// This is free and unencumbered software released into the public domain.
-// For more information, see <https://unlicense.org>
-//
-
-import Foundation
-
-enum NoiseSecurityError: Error {
-    case sessionExpired
-    case sessionExhausted
-    case messageTooLarge
-    case invalidPeerID
-    case rateLimitExceeded
-    case handshakeTimeout
-}

bitchat/Noise/NoiseSecurityValidator.swift

@@ -1,22 +0,0 @@
-//
-// NoiseSecurityValidator.swift
-// bitchat
-//
-// This is free and unencumbered software released into the public domain.
-// For more information, see <https://unlicense.org>
-//
-
-import Foundation
-
-struct NoiseSecurityValidator {
-    
-    /// Validate message size
-    static func validateMessageSize(_ data: Data) -> Bool {
-        return data.count <= NoiseSecurityConstants.maxMessageSize
-    }
-    
-    /// Validate handshake message size
-    static func validateHandshakeMessageSize(_ data: Data) -> Bool {
-        return data.count <= NoiseSecurityConstants.maxHandshakeMessageSize
-    }
-}

bitchat/Noise/NoiseSession.swift

@@ -196,6 +196,12 @@ class NoiseSession {
         }
     }
     
+    func getHandshakeHash() -> Data? {
+        return sessionQueue.sync {
+            return handshakeHash
+        }
+    }
+    
     func reset() {
         sessionQueue.sync(flags: .barrier) {
             let wasEstablished = state == .established

bitchat/Noise/NoiseSessionError.swift

@@ -6,9 +6,10 @@
 // For more information, see <https://unlicense.org>
 //
 
-enum NoiseSessionError: Error, Equatable {
+enum NoiseSessionError: Error {
     case invalidState
     case notEstablished
     case sessionNotFound
+    case handshakeFailed(Error)
     case alreadyEstablished
 }

bitchat/Noise/NoiseSessionManager.swift

@@ -27,6 +27,19 @@ final class NoiseSessionManager {
     
     // MARK: - Session Management
     
+    func createSession(for peerID: PeerID, role: NoiseRole) -> NoiseSession {
+        return managerQueue.sync(flags: .barrier) {
+            let session = SecureNoiseSession(
+                peerID: peerID,
+                role: role,
+                keychain: keychain,
+                localStaticKey: localStaticKey
+            )
+            sessions[peerID] = session
+            return session
+        }
+    }
+    
     func getSession(for peerID: PeerID) -> NoiseSession? {
         return managerQueue.sync {
             return sessions[peerID]
@@ -35,9 +48,14 @@ final class NoiseSessionManager {
     
     func removeSession(for peerID: PeerID) {
         managerQueue.sync(flags: .barrier) {
-            if let session = sessions.removeValue(forKey: peerID) {
+            if let session = sessions[peerID] {
-                session.reset() // Clear sensitive data before removing
+                if session.isEstablished() {
+                    SecureLogger.info(.sessionExpired(peerID: peerID.id))
+                }
+                // Clear sensitive data before removing
+                session.reset()
             }
+            _ = sessions.removeValue(forKey: peerID)
         }
     }
 
@@ -50,6 +68,12 @@ final class NoiseSessionManager {
         }
     }
     
+    func getEstablishedSessions() -> [PeerID: NoiseSession] {
+        return managerQueue.sync {
+            return sessions.filter { $0.value.isEstablished() }
+        }
+    }
+    
     // MARK: - Handshake Helpers
     
     func initiateHandshake(with peerID: PeerID) throws -> Data {
@@ -183,6 +207,10 @@ final class NoiseSessionManager {
         return getSession(for: peerID)?.getRemoteStaticPublicKey()
     }
     
+    func getHandshakeHash(for peerID: PeerID) -> Data? {
+        return getSession(for: peerID)?.getHandshakeHash()
+    }
+    
     // MARK: - Session Rekeying
     
     func getSessionsNeedingRekey() -> [(peerID: PeerID, needsRekey: Bool)] {

bitchat/Noise/SecureNoiseSession.swift

@@ -1,81 +0,0 @@
-//
-// SecureNoiseSession.swift
-// bitchat
-//
-// This is free and unencumbered software released into the public domain.
-// For more information, see <https://unlicense.org>
-//
-
-import Foundation
-
-final class SecureNoiseSession: NoiseSession {
-    private(set) var messageCount: UInt64 = 0
-    private let sessionStartTime = Date()
-    private(set) var lastActivityTime = Date()
-    
-    override func encrypt(_ plaintext: Data) throws -> Data {
-        // Check session age
-        if Date().timeIntervalSince(sessionStartTime) > NoiseSecurityConstants.sessionTimeout {
-            throw NoiseSecurityError.sessionExpired
-        }
-        
-        // Check message count
-        if messageCount >= NoiseSecurityConstants.maxMessagesPerSession {
-            throw NoiseSecurityError.sessionExhausted
-        }
-        
-        // Validate message size
-        guard NoiseSecurityValidator.validateMessageSize(plaintext) else {
-            throw NoiseSecurityError.messageTooLarge
-        }
-        
-        let encrypted = try super.encrypt(plaintext)
-        messageCount += 1
-        lastActivityTime = Date()
-        
-        return encrypted
-    }
-    
-    override func decrypt(_ ciphertext: Data) throws -> Data {
-        // Check session age
-        if Date().timeIntervalSince(sessionStartTime) > NoiseSecurityConstants.sessionTimeout {
-            throw NoiseSecurityError.sessionExpired
-        }
-        
-        // Validate message size
-        guard NoiseSecurityValidator.validateMessageSize(ciphertext) else {
-            throw NoiseSecurityError.messageTooLarge
-        }
-        
-        let decrypted = try super.decrypt(ciphertext)
-        lastActivityTime = Date()
-        
-        return decrypted
-    }
-    
-    func needsRenegotiation() -> Bool {
-        // Check if we've used more than 90% of message limit
-        let messageThreshold = UInt64(Double(NoiseSecurityConstants.maxMessagesPerSession) * 0.9)
-        if messageCount >= messageThreshold {
-            return true
-        }
-        
-        // Check if last activity was more than 30 minutes ago
-        if Date().timeIntervalSince(lastActivityTime) > NoiseSecurityConstants.sessionTimeout {
-            return true
-        }
-        
-        return false
-    }
-    
-    // MARK: - Testing Support
-    #if DEBUG
-    func setLastActivityTimeForTesting(_ date: Date) {
-        lastActivityTime = date
-    }
-    
-    func setMessageCountForTesting(_ count: UInt64) {
-        messageCount = count
-    }
-    #endif
-}

bitchat/Nostr/Bech32.swift

@@ -1,135 +0,0 @@
-import Foundation
-
-/// Bech32 encoding for Nostr (minimal implementation)
-enum Bech32 {
-    private static let charset = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
-    private static let generator = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3]
-    
-    static func encode(hrp: String, data: Data) throws -> String {
-        let values = convertBits(from: 8, to: 5, pad: true, data: Array(data))
-        let checksum = createChecksum(hrp: hrp, values: values)
-        let combined = values + checksum
-        
-        return hrp + "1" + combined.map { 
-            let index = charset.index(charset.startIndex, offsetBy: Int($0))
-            return String(charset[index])
-        }.joined()
-    }
-    
-    static func decode(_ bech32String: String) throws -> (hrp: String, data: Data) {
-        // Find the last occurrence of '1'
-        guard let separatorIndex = bech32String.lastIndex(of: "1") else {
-            throw Bech32Error.invalidFormat
-        }
-        
-        let hrp = String(bech32String[..<separatorIndex])
-        
-        // Validate HRP contains only ASCII characters
-        for char in hrp {
-            guard char.asciiValue != nil else {
-                throw Bech32Error.invalidCharacter
-            }
-        }
-        
-        let dataString = String(bech32String[bech32String.index(after: separatorIndex)...])
-        
-        // Convert characters to values
-        var values = [UInt8]()
-        for char in dataString {
-            guard let index = charset.firstIndex(of: char) else {
-                throw Bech32Error.invalidCharacter
-            }
-            values.append(UInt8(charset.distance(from: charset.startIndex, to: index)))
-        }
-        
-        // Verify checksum
-        guard values.count >= 6 else {
-            throw Bech32Error.invalidChecksum
-        }
-        
-        let payloadValues = Array(values.dropLast(6))
-        let checksum = Array(values.suffix(6))
-        let expectedChecksum = createChecksum(hrp: hrp, values: payloadValues)
-        
-        guard checksum == expectedChecksum else {
-            throw Bech32Error.invalidChecksum
-        }
-        
-        // Convert back to bytes
-        let bytes = convertBits(from: 5, to: 8, pad: false, data: payloadValues)
-        return (hrp: hrp, data: Data(bytes))
-    }
-    
-    enum Bech32Error: Error {
-        case invalidFormat
-        case invalidCharacter
-        case invalidChecksum
-    }
-    
-    private static func convertBits(from: Int, to: Int, pad: Bool, data: [UInt8]) -> [UInt8] {
-        var acc = 0
-        var bits = 0
-        var result = [UInt8]()
-        let maxv = (1 << to) - 1
-        
-        for value in data {
-            acc = (acc << from) | Int(value)
-            bits += from
-            
-            while bits >= to {
-                bits -= to
-                result.append(UInt8((acc >> bits) & maxv))
-            }
-        }
-        
-        if pad && bits > 0 {
-            result.append(UInt8((acc << (to - bits)) & maxv))
-        }
-        
-        return result
-    }
-    
-    private static func createChecksum(hrp: String, values: [UInt8]) -> [UInt8] {
-        let checksumValues = hrpExpand(hrp) + values + [0, 0, 0, 0, 0, 0]
-        let polymod = polymod(checksumValues) ^ 1
-        var checksum = [UInt8]()
-        
-        for i in 0..<6 {
-            checksum.append(UInt8((polymod >> (5 * (5 - i))) & 31))
-        }
-        
-        return checksum
-    }
-    
-    private static func hrpExpand(_ hrp: String) -> [UInt8] {
-        var result = [UInt8]()
-        for c in hrp {
-            guard let asciiValue = c.asciiValue else {
-                return [] // Return empty array for invalid input
-            }
-            result.append(UInt8(asciiValue >> 5))
-        }
-        result.append(0)
-        for c in hrp {
-            guard let asciiValue = c.asciiValue else {
-                return [] // Return empty array for invalid input
-            }
-            result.append(UInt8(asciiValue & 31))
-        }
-        return result
-    }
-    
-    private static func polymod(_ values: [UInt8]) -> Int {
-        var chk = 1
-        for value in values {
-            let b = chk >> 25
-            chk = (chk & 0x1ffffff) << 5 ^ Int(value)
-            for i in 0..<5 {
-                if (b >> i) & 1 == 1 {
-                    chk ^= generator[i]
-                }
-            }
-        }
-        return chk
-    }
-}

bitchat/Nostr/GeoRelayDirectory.swift

@@ -33,32 +33,13 @@ final class GeoRelayDirectory {
 
     /// Returns up to `count` relay URLs (wss://) closest to the given coordinate.
     func closestRelays(toLat lat: Double, lon: Double, count: Int = 5) -> [String] {
-        guard !entries.isEmpty, count > 0 else { return [] }
+        guard !entries.isEmpty else { return [] }
-
+        let sorted = entries
-        if entries.count <= count {
+            .sorted { a, b in
-            return entries
+                haversineKm(lat, lon, a.lat, a.lon) < haversineKm(lat, lon, b.lat, b.lon)
-                .sorted { a, b in
-                    haversineKm(lat, lon, a.lat, a.lon) < haversineKm(lat, lon, b.lat, b.lon)
-                }
-                .map { "wss://\($0.host)" }
-        }
-
-        var best: [(entry: Entry, distance: Double)] = []
-        best.reserveCapacity(count)
-
-        for entry in entries {
-            let distance = haversineKm(lat, lon, entry.lat, entry.lon)
-            if best.count < count {
-                let idx = best.firstIndex { $0.distance > distance } ?? best.count
-                best.insert((entry, distance), at: idx)
-            } else if let worstDistance = best.last?.distance, distance < worstDistance {
-                let idx = best.firstIndex { $0.distance > distance } ?? best.count
-                best.insert((entry, distance), at: idx)
-                best.removeLast()
             }
-        }
+            .prefix(count)
-
+        return sorted.map { "wss://\($0.host)" }
-        return best.map { "wss://\($0.entry.host)" }
     }
 
     // MARK: - Remote Fetch

bitchat/Nostr/KeychainHelper.swift

@@ -1,50 +0,0 @@
-import Foundation
-
-protocol KeychainHelperProtocol {
-    func save(key: String, data: Data, service: String, accessible: CFString?)
-    func load(key: String, service: String) -> Data?
-    func delete(key: String, service: String)
-}
-
-/// Keychain helper for secure storage
-struct KeychainHelper: KeychainHelperProtocol {
-    func save(key: String, data: Data, service: String, accessible: CFString? = nil) {
-        var query: [String: Any] = [
-            kSecClass as String: kSecClassGenericPassword,
-            kSecAttrService as String: service,
-            kSecAttrAccount as String: key,
-            kSecValueData as String: data
-        ]
-        if let accessible = accessible {
-            query[kSecAttrAccessible as String] = accessible
-        }
-        
-        SecItemDelete(query as CFDictionary)
-        SecItemAdd(query as CFDictionary, nil)
-    }
-    
-    func load(key: String, service: String) -> Data? {
-        let query: [String: Any] = [
-            kSecClass as String: kSecClassGenericPassword,
-            kSecAttrService as String: service,
-            kSecAttrAccount as String: key,
-            kSecReturnData as String: true
-        ]
-        
-        var result: AnyObject?
-        let status = SecItemCopyMatching(query as CFDictionary, &result)
-        
-        guard status == errSecSuccess else { return nil }
-        return result as? Data
-    }
-    
-    func delete(key: String, service: String) {
-        let query: [String: Any] = [
-            kSecClass as String: kSecClassGenericPassword,
-            kSecAttrService as String: service,
-            kSecAttrAccount as String: key
-        ]
-        
-        SecItemDelete(query as CFDictionary)
-    }
-}

bitchat/Nostr/NostrIdentity.swift

@@ -1,5 +1,50 @@
 import Foundation
+import CryptoKit
 import P256K
+import Security
+
+// Keychain helper for secure storage
+struct KeychainHelper {
+    static func save(key: String, data: Data, service: String, accessible: CFString? = nil) {
+        var query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: key,
+            kSecValueData as String: data
+        ]
+        if let accessible = accessible {
+            query[kSecAttrAccessible as String] = accessible
+        }
+        
+        SecItemDelete(query as CFDictionary)
+        SecItemAdd(query as CFDictionary, nil)
+    }
+    
+    static func load(key: String, service: String) -> Data? {
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: key,
+            kSecReturnData as String: true
+        ]
+        
+        var result: AnyObject?
+        let status = SecItemCopyMatching(query as CFDictionary, &result)
+        
+        guard status == errSecSuccess else { return nil }
+        return result as? Data
+    }
+    
+    static func delete(key: String, service: String) {
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: key
+        ]
+        
+        SecItemDelete(query as CFDictionary)
+    }
+}
 
 /// Manages Nostr identity (secp256k1 keypair) for NIP-17 private messaging
 struct NostrIdentity: Codable {
@@ -58,3 +103,266 @@ struct NostrIdentity: Codable {
         return publicKey.hexEncodedString()
     }
 }
+
+/// Bridge between Noise and Nostr identities
+struct NostrIdentityBridge {
+    private static let keychainService = "chat.bitchat.nostr"
+    private static let currentIdentityKey = "nostr-current-identity"
+    private static let deviceSeedKey = "nostr-device-seed"
+    // In-memory cache to avoid transient keychain access issues
+    private static var deviceSeedCache: Data?
+    
+    /// Get or create the current Nostr identity
+    static func getCurrentNostrIdentity() throws -> NostrIdentity? {
+        // Check if we already have a Nostr identity
+        if let existingData = KeychainHelper.load(key: currentIdentityKey, service: keychainService),
+           let identity = try? JSONDecoder().decode(NostrIdentity.self, from: existingData) {
+            return identity
+        }
+        
+        // Generate new Nostr identity
+        let nostrIdentity = try NostrIdentity.generate()
+        
+        // Store it
+        let data = try JSONEncoder().encode(nostrIdentity)
+        KeychainHelper.save(key: currentIdentityKey, data: data, service: keychainService)
+        
+        return nostrIdentity
+    }
+    
+    /// Associate a Nostr identity with a Noise public key (for favorites)
+    static func associateNostrIdentity(_ nostrPubkey: String, with noisePublicKey: Data) {
+        let key = "nostr-noise-\(noisePublicKey.base64EncodedString())"
+        if let data = nostrPubkey.data(using: .utf8) {
+            KeychainHelper.save(key: key, data: data, service: keychainService)
+        }
+    }
+    
+    /// Get Nostr public key associated with a Noise public key
+    static func getNostrPublicKey(for noisePublicKey: Data) -> String? {
+        let key = "nostr-noise-\(noisePublicKey.base64EncodedString())"
+        guard let data = KeychainHelper.load(key: key, service: keychainService),
+              let pubkey = String(data: data, encoding: .utf8) else {
+            return nil
+        }
+        return pubkey
+    }
+    
+    /// Clear all Nostr identity associations and current identity
+    static func clearAllAssociations() {
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: keychainService,
+            kSecMatchLimit as String: kSecMatchLimitAll,
+            kSecReturnAttributes as String: true
+        ]
+
+        var result: AnyObject?
+        let status = SecItemCopyMatching(query as CFDictionary, &result)
+        if status == errSecSuccess, let items = result as? [[String: Any]] {
+            for item in items {
+                var deleteQuery: [String: Any] = [
+                    kSecClass as String: kSecClassGenericPassword,
+                    kSecAttrService as String: keychainService
+                ]
+                if let account = item[kSecAttrAccount as String] as? String {
+                    deleteQuery[kSecAttrAccount as String] = account
+                }
+                SecItemDelete(deleteQuery as CFDictionary)
+            }
+        } else if status == errSecItemNotFound {
+            // nothing persisted; no action needed
+        }
+
+        deviceSeedCache = nil
+    }
+
+    // MARK: - Per-Geohash Identities (Location Channels)
+
+    /// Returns a stable device seed used to derive unlinkable per-geohash identities.
+    /// Stored only on device keychain.
+    private static func getOrCreateDeviceSeed() -> Data {
+        if let cached = deviceSeedCache { return cached }
+        if let existing = KeychainHelper.load(key: deviceSeedKey, service: keychainService) {
+            // Migrate to AfterFirstUnlockThisDeviceOnly for stability during lock
+            KeychainHelper.save(key: deviceSeedKey, data: existing, service: keychainService, accessible: kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly)
+            deviceSeedCache = existing
+            return existing
+        }
+        var seed = Data(count: 32)
+        _ = seed.withUnsafeMutableBytes { ptr in
+            SecRandomCopyBytes(kSecRandomDefault, 32, ptr.baseAddress!)
+        }
+        // Ensure availability after first unlock to prevent unintended rotation when locked
+        KeychainHelper.save(key: deviceSeedKey, data: seed, service: keychainService, accessible: kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly)
+        deviceSeedCache = seed
+        return seed
+    }
+
+    /// Derive a deterministic, unlinkable Nostr identity for a given geohash.
+    /// Uses HMAC-SHA256(deviceSeed, geohash) as private key material, with fallback rehashing
+    /// if the candidate is not a valid secp256k1 private key.
+    static func deriveIdentity(forGeohash geohash: String) throws -> NostrIdentity {
+        let seed = getOrCreateDeviceSeed()
+        guard let msg = geohash.data(using: .utf8) else {
+            throw NSError(domain: "NostrIdentity", code: -1, userInfo: [NSLocalizedDescriptionKey: "Invalid geohash string"])
+        }
+
+        func candidateKey(iteration: UInt32) -> Data {
+            var input = Data(msg)
+            var iterBE = iteration.bigEndian
+            withUnsafeBytes(of: &iterBE) { bytes in
+                input.append(contentsOf: bytes)
+            }
+            let code = CryptoKit.HMAC<CryptoKit.SHA256>.authenticationCode(for: input, using: SymmetricKey(data: seed))
+            return Data(code)
+        }
+
+        // Try a few iterations to ensure a valid key can be formed
+        for i in 0..<10 {
+            let keyData = candidateKey(iteration: UInt32(i))
+            if let identity = try? NostrIdentity(privateKeyData: keyData) {
+                return identity
+            }
+        }
+        // As a final fallback, hash the seed+msg and try again
+        let fallback = (seed + msg).sha256Hash()
+        return try NostrIdentity(privateKeyData: fallback)
+    }
+}
+
+// Bech32 encoding for Nostr (minimal implementation)
+enum Bech32 {
+    private static let charset = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
+    private static let generator = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3]
+    
+    static func encode(hrp: String, data: Data) throws -> String {
+        let values = convertBits(from: 8, to: 5, pad: true, data: Array(data))
+        let checksum = createChecksum(hrp: hrp, values: values)
+        let combined = values + checksum
+        
+        return hrp + "1" + combined.map { 
+            let index = charset.index(charset.startIndex, offsetBy: Int($0))
+            return String(charset[index])
+        }.joined()
+    }
+    
+    static func decode(_ bech32String: String) throws -> (hrp: String, data: Data) {
+        // Find the last occurrence of '1'
+        guard let separatorIndex = bech32String.lastIndex(of: "1") else {
+            throw Bech32Error.invalidFormat
+        }
+        
+        let hrp = String(bech32String[..<separatorIndex])
+        
+        // Validate HRP contains only ASCII characters
+        for char in hrp {
+            guard char.asciiValue != nil else {
+                throw Bech32Error.invalidCharacter
+            }
+        }
+        
+        let dataString = String(bech32String[bech32String.index(after: separatorIndex)...])
+        
+        // Convert characters to values
+        var values = [UInt8]()
+        for char in dataString {
+            guard let index = charset.firstIndex(of: char) else {
+                throw Bech32Error.invalidCharacter
+            }
+            values.append(UInt8(charset.distance(from: charset.startIndex, to: index)))
+        }
+        
+        // Verify checksum
+        guard values.count >= 6 else {
+            throw Bech32Error.invalidChecksum
+        }
+        
+        let payloadValues = Array(values.dropLast(6))
+        let checksum = Array(values.suffix(6))
+        let expectedChecksum = createChecksum(hrp: hrp, values: payloadValues)
+        
+        guard checksum == expectedChecksum else {
+            throw Bech32Error.invalidChecksum
+        }
+        
+        // Convert back to bytes
+        let bytes = convertBits(from: 5, to: 8, pad: false, data: payloadValues)
+        return (hrp: hrp, data: Data(bytes))
+    }
+    
+    enum Bech32Error: Error {
+        case invalidFormat
+        case invalidCharacter
+        case invalidChecksum
+    }
+    
+    private static func convertBits(from: Int, to: Int, pad: Bool, data: [UInt8]) -> [UInt8] {
+        var acc = 0
+        var bits = 0
+        var result = [UInt8]()
+        let maxv = (1 << to) - 1
+        
+        for value in data {
+            acc = (acc << from) | Int(value)
+            bits += from
+            
+            while bits >= to {
+                bits -= to
+                result.append(UInt8((acc >> bits) & maxv))
+            }
+        }
+        
+        if pad && bits > 0 {
+            result.append(UInt8((acc << (to - bits)) & maxv))
+        }
+        
+        return result
+    }
+    
+    private static func createChecksum(hrp: String, values: [UInt8]) -> [UInt8] {
+        let checksumValues = hrpExpand(hrp) + values + [0, 0, 0, 0, 0, 0]
+        let polymod = polymod(checksumValues) ^ 1
+        var checksum = [UInt8]()
+        
+        for i in 0..<6 {
+            checksum.append(UInt8((polymod >> (5 * (5 - i))) & 31))
+        }
+        
+        return checksum
+    }
+    
+    private static func hrpExpand(_ hrp: String) -> [UInt8] {
+        var result = [UInt8]()
+        for c in hrp {
+            guard let asciiValue = c.asciiValue else {
+                return [] // Return empty array for invalid input
+            }
+            result.append(UInt8(asciiValue >> 5))
+        }
+        result.append(0)
+        for c in hrp {
+            guard let asciiValue = c.asciiValue else {
+                return [] // Return empty array for invalid input
+            }
+            result.append(UInt8(asciiValue & 31))
+        }
+        return result
+    }
+    
+    private static func polymod(_ values: [UInt8]) -> Int {
+        var chk = 1
+        for value in values {
+            let b = chk >> 25
+            chk = (chk & 0x1ffffff) << 5 ^ Int(value)
+            for i in 0..<5 {
+                if (b >> i) & 1 == 1 {
+                    chk ^= generator[i]
+                }
+            }
+        }
+        return chk
+    }
+}
+
+// Data hex encoding extension moved to BinaryEncodingUtils.swift to avoid duplication

bitchat/Nostr/NostrIdentityBridge.swift

@@ -1,157 +0,0 @@
-import Foundation
-import CryptoKit
-
-/// Bridge between Noise and Nostr identities
-final class NostrIdentityBridge {
-    private let keychainService = "chat.bitchat.nostr"
-    private let currentIdentityKey = "nostr-current-identity"
-    private let deviceSeedKey = "nostr-device-seed"
-    // In-memory cache to avoid transient keychain access issues
-    private var deviceSeedCache: Data?
-    // Cache derived identities to avoid repeated crypto during view rendering
-    private var derivedIdentityCache: [String: NostrIdentity] = [:]
-    private let cacheLock = NSLock()
-
-    private let keychain: KeychainHelperProtocol
-
-    init(keychain: KeychainHelperProtocol = KeychainHelper()) {
-        self.keychain = keychain
-    }
-    
-    /// Get or create the current Nostr identity
-    func getCurrentNostrIdentity() throws -> NostrIdentity? {
-        // Check if we already have a Nostr identity
-        if let existingData = keychain.load(key: currentIdentityKey, service: keychainService),
-           let identity = try? JSONDecoder().decode(NostrIdentity.self, from: existingData) {
-            return identity
-        }
-        
-        // Generate new Nostr identity
-        let nostrIdentity = try NostrIdentity.generate()
-        
-        // Store it
-        let data = try JSONEncoder().encode(nostrIdentity)
-        keychain.save(key: currentIdentityKey, data: data, service: keychainService, accessible: nil)
-        
-        return nostrIdentity
-    }
-    
-    /// Associate a Nostr identity with a Noise public key (for favorites)
-    func associateNostrIdentity(_ nostrPubkey: String, with noisePublicKey: Data) {
-        let key = "nostr-noise-\(noisePublicKey.base64EncodedString())"
-        if let data = nostrPubkey.data(using: .utf8) {
-            keychain.save(key: key, data: data, service: keychainService, accessible: nil)
-        }
-    }
-    
-    /// Get Nostr public key associated with a Noise public key
-    func getNostrPublicKey(for noisePublicKey: Data) -> String? {
-        let key = "nostr-noise-\(noisePublicKey.base64EncodedString())"
-        guard let data = keychain.load(key: key, service: keychainService),
-              let pubkey = String(data: data, encoding: .utf8) else {
-            return nil
-        }
-        return pubkey
-    }
-    
-    /// Clear all Nostr identity associations and current identity
-    func clearAllAssociations() {
-        let query: [String: Any] = [
-            kSecClass as String: kSecClassGenericPassword,
-            kSecAttrService as String: keychainService,
-            kSecMatchLimit as String: kSecMatchLimitAll,
-            kSecReturnAttributes as String: true
-        ]
-
-        var result: AnyObject?
-        let status = SecItemCopyMatching(query as CFDictionary, &result)
-        if status == errSecSuccess, let items = result as? [[String: Any]] {
-            for item in items {
-                var deleteQuery: [String: Any] = [
-                    kSecClass as String: kSecClassGenericPassword,
-                    kSecAttrService as String: keychainService
-                ]
-                if let account = item[kSecAttrAccount as String] as? String {
-                    deleteQuery[kSecAttrAccount as String] = account
-                }
-                SecItemDelete(deleteQuery as CFDictionary)
-            }
-        } else if status == errSecItemNotFound {
-            // nothing persisted; no action needed
-        }
-
-        deviceSeedCache = nil
-    }
-
-    // MARK: - Per-Geohash Identities (Location Channels)
-
-    /// Returns a stable device seed used to derive unlinkable per-geohash identities.
-    /// Stored only on device keychain.
-    private func getOrCreateDeviceSeed() -> Data {
-        if let cached = deviceSeedCache { return cached }
-        if let existing = keychain.load(key: deviceSeedKey, service: keychainService) {
-            // Migrate to AfterFirstUnlockThisDeviceOnly for stability during lock
-            keychain.save(key: deviceSeedKey, data: existing, service: keychainService, accessible: kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly)
-            deviceSeedCache = existing
-            return existing
-        }
-        var seed = Data(count: 32)
-        _ = seed.withUnsafeMutableBytes { ptr in
-            SecRandomCopyBytes(kSecRandomDefault, 32, ptr.baseAddress!)
-        }
-        // Ensure availability after first unlock to prevent unintended rotation when locked
-        keychain.save(key: deviceSeedKey, data: seed, service: keychainService, accessible: kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly)
-        deviceSeedCache = seed
-        return seed
-    }
-
-    /// Derive a deterministic, unlinkable Nostr identity for a given geohash.
-    /// Uses HMAC-SHA256(deviceSeed, geohash) as private key material, with fallback rehashing
-    /// if the candidate is not a valid secp256k1 private key.
-    func deriveIdentity(forGeohash geohash: String) throws -> NostrIdentity {
-        // Check cache first to avoid repeated crypto + keychain I/O during view rendering
-        cacheLock.lock()
-        if let cached = derivedIdentityCache[geohash] {
-            cacheLock.unlock()
-            return cached
-        }
-        cacheLock.unlock()
-
-        let seed = getOrCreateDeviceSeed()
-        guard let msg = geohash.data(using: .utf8) else {
-            throw NSError(domain: "NostrIdentity", code: -1, userInfo: [NSLocalizedDescriptionKey: "Invalid geohash string"])
-        }
-
-        func candidateKey(iteration: UInt32) -> Data {
-            var input = Data(msg)
-            var iterBE = iteration.bigEndian
-            withUnsafeBytes(of: &iterBE) { bytes in
-                input.append(contentsOf: bytes)
-            }
-            let code = HMAC<SHA256>.authenticationCode(for: input, using: SymmetricKey(data: seed))
-            return Data(code)
-        }
-
-        // Try a few iterations to ensure a valid key can be formed
-        for i in 0..<10 {
-            let keyData = candidateKey(iteration: UInt32(i))
-            if let identity = try? NostrIdentity(privateKeyData: keyData) {
-                // Cache the result
-                cacheLock.lock()
-                derivedIdentityCache[geohash] = identity
-                cacheLock.unlock()
-                return identity
-            }
-        }
-        // As a final fallback, hash the seed+msg and try again
-        let fallback = (seed + msg).sha256Hash()
-        let identity = try NostrIdentity(privateKeyData: fallback)
-
-        // Cache the result
-        cacheLock.lock()
-        derivedIdentityCache[geohash] = identity
-        cacheLock.unlock()
-
-        return identity
-    }
-}

bitchat/Nostr/NostrRelayManager.swift

@@ -109,7 +109,20 @@ final class NostrRelayManager: ObservableObject {
             }
             .store(in: &cancellables)
     }
-    
+
+    deinit {
+        // Clean up timers and active connections
+        reconnectionTimer?.invalidate()
+        for (_, tracker) in eoseTrackers {
+            tracker.timer?.invalidate()
+        }
+        for (_, task) in connections {
+            task.cancel(with: .goingAway, reason: nil)
+        }
+        cancellables.removeAll()
+        SecureLogger.debug("NostrRelayManager deinitialized", category: .session)
+    }
+
     /// Connect to all configured relays
     func connect() {
         // Global network policy gate
@@ -906,16 +919,6 @@ struct NostrFilter: Encodable {
         filter.limit = limit
         return filter
     }
-
-    // For location notes with neighbors: subscribe to multiple geohashes (center + neighbors)
-    static func geohashNotes(_ geohashes: [String], since: Date? = nil, limit: Int = 200) -> NostrFilter {
-        var filter = NostrFilter()
-        filter.kinds = [1]
-        filter.since = since?.timeIntervalSince1970.toInt()
-        filter.tagFilters = ["g": geohashes]
-        filter.limit = limit
-        return filter
-    }
 }
 
 // Dynamic coding key for tag filters

bitchat/Protocols/BinaryEncodingUtils.swift

@@ -6,7 +6,6 @@
 //
 
 import Foundation
-import CryptoKit
 
 // MARK: - Hex Encoding/Decoding
 
@@ -17,11 +16,6 @@ extension Data {
         }
         return self.map { String(format: "%02x", $0) }.joined()
     }
-
-    func sha256Hex() -> String {
-        let digest = SHA256.hash(data: self)
-        return digest.map { String(format: "%02x", $0) }.joined()
-    }
     
     init?(hexString: String) {
         let len = hexString.count / 2

bitchat/Protocols/BinaryProtocol.swift

@@ -22,11 +22,11 @@
 ///
 /// ## Wire Format
 /// ```
-/// Header (Fixed 14 bytes for v1, 16 bytes for v2):
+/// Header (Fixed 13 bytes):
-/// +--------+------+-----+-----------+-------+------------------+
+/// +--------+------+-----+-----------+-------+----------------+
-/// |Version | Type | TTL | Timestamp | Flags | PayloadLength    |
+/// |Version | Type | TTL | Timestamp | Flags | PayloadLength  |
-/// |1 byte  |1 byte|1byte| 8 bytes   | 1 byte| 2 or 4 bytes     |
+/// |1 byte  |1 byte|1byte| 8 bytes   | 1 byte| 2 bytes        |
-/// +--------+------+-----+-----------+-------+------------------+
+/// +--------+------+-----+-----------+-------+----------------+
 ///
 /// Variable sections:
 /// +----------+-------------+---------+------------+
@@ -52,7 +52,7 @@
 /// ## Flag Bits
 /// - Bit 0: Has recipient ID (directed message)
 /// - Bit 1: Has signature (authenticated message)
-/// - Bit 2: Is compressed (zlib compression applied)
+/// - Bit 2: Is compressed (LZ4 compression applied)
 /// - Bits 3-7: Reserved for future use
 ///
 /// ## Size Constraints
@@ -89,7 +89,6 @@
 ///
 
 import Foundation
-import BitLogger
 
 extension Data {
     func trimmingNullBytes() -> Data {
@@ -106,32 +105,10 @@ extension Data {
 /// their binary wire format representation.
 /// - Note: All multi-byte values use network byte order (big-endian)
 struct BinaryProtocol {
-    static let v1HeaderSize = 14
+    static let headerSize = 13
-    static let v2HeaderSize = 16
     static let senderIDSize = 8
     static let recipientIDSize = 8
     static let signatureSize = 64
-
-    // Field offsets within packet header
-    struct Offsets {
-        static let version = 0
-        static let type = 1
-        static let ttl = 2
-        static let timestamp = 3
-        static let flags = 11  // After version(1) + type(1) + ttl(1) + timestamp(8)
-    }
-
-    static func headerSize(for version: UInt8) -> Int? {
-        switch version {
-        case 1: return v1HeaderSize
-        case 2: return v2HeaderSize
-        default: return nil
-        }
-    }
-
-    private static func lengthFieldSize(for version: UInt8) -> Int {
-        return version == 2 ? 4 : 2
-    }
     
     struct Flags {
         static let hasRecipient: UInt8 = 0x01
@@ -141,69 +118,70 @@ struct BinaryProtocol {
     
     // Encode BitchatPacket to binary format
     static func encode(_ packet: BitchatPacket, padding: Bool = true) -> Data? {
-        let version = packet.version
+        var data = Data()
-        guard version == 1 || version == 2 else { return nil }
+        
-
+        
-        // Try to compress payload when beneficial, keeping original size for later decoding
+        // Try to compress payload if beneficial
         var payload = packet.payload
+        var originalPayloadSize: UInt16? = nil
         var isCompressed = false
-        var originalPayloadSize: Int?
+        
         if CompressionUtil.shouldCompress(payload) {
-            // Only compress when we can represent the original length in the outbound frame
+            if let compressedPayload = CompressionUtil.compress(payload) {
-            let maxRepresentable = version == 2 ? Int(UInt32.max) : Int(UInt16.max)
+                // Store original size for decompression (2 bytes after payload)
-            if payload.count <= maxRepresentable,
+                originalPayloadSize = UInt16(payload.count)
-               let compressedPayload = CompressionUtil.compress(payload) {
-                originalPayloadSize = payload.count
                 payload = compressedPayload
                 isCompressed = true
-            }
+                
-        }
+            } else {
-
-        let lengthFieldBytes = lengthFieldSize(for: version)
-        let originalSizeFieldBytes = isCompressed ? lengthFieldBytes : 0
-        let payloadDataSize = payload.count + originalSizeFieldBytes
-
-        if version == 1 && payloadDataSize > Int(UInt16.max) { return nil }
-        if version == 2 && payloadDataSize > Int(UInt32.max) { return nil }
-
-        guard let headerSize = headerSize(for: version) else { return nil }
-        let estimatedHeader = headerSize + senderIDSize + (packet.recipientID == nil ? 0 : recipientIDSize)
-        let estimatedPayload = payloadDataSize
-        let estimatedSignature = (packet.signature == nil ? 0 : signatureSize)
-        var data = Data()
-        data.reserveCapacity(estimatedHeader + estimatedPayload + estimatedSignature + 255)
-
-        data.append(version)
-        data.append(packet.type)
-        data.append(packet.ttl)
-
-        for shift in stride(from: 56, through: 0, by: -8) {
-            data.append(UInt8((packet.timestamp >> UInt64(shift)) & 0xFF))
-        }
-
-        var flags: UInt8 = 0
-        if packet.recipientID != nil { flags |= Flags.hasRecipient }
-        if packet.signature != nil { flags |= Flags.hasSignature }
-        if isCompressed { flags |= Flags.isCompressed }
-        data.append(flags)
-
-        if version == 2 {
-            let length = UInt32(payloadDataSize)
-            for shift in stride(from: 24, through: 0, by: -8) {
-                data.append(UInt8((length >> UInt32(shift)) & 0xFF))
             }
         } else {
-            let length = UInt16(payloadDataSize)
-            data.append(UInt8((length >> 8) & 0xFF))
-            data.append(UInt8(length & 0xFF))
         }
-
+        
+        // Header
+        // Reserve capacity to reduce reallocations. Estimate base size conservatively.
+        // header(13) + sender(8) + opt recipient(8) + opt originalSize(2) + payload + opt signature(64) + up to 255 pad
+        let estimatedPayload = payload.count + (isCompressed ? 2 : 0)
+        let estimated = headerSize + senderIDSize + (packet.recipientID == nil ? 0 : recipientIDSize) + estimatedPayload + (packet.signature == nil ? 0 : signatureSize) + 255
+        data.reserveCapacity(estimated)
+        data.append(packet.version)
+        data.append(packet.type)
+        data.append(packet.ttl)
+        
+        // Timestamp (8 bytes, big-endian)
+        for i in (0..<8).reversed() {
+            data.append(UInt8((packet.timestamp >> (i * 8)) & 0xFF))
+        }
+        
+        // Flags
+        var flags: UInt8 = 0
+        if packet.recipientID != nil {
+            flags |= Flags.hasRecipient
+        }
+        if packet.signature != nil {
+            flags |= Flags.hasSignature
+        }
+        if isCompressed {
+            flags |= Flags.isCompressed
+        }
+        data.append(flags)
+        
+        // Payload length (2 bytes, big-endian) - includes original size if compressed
+        let payloadDataSize = payload.count + (isCompressed ? 2 : 0)
+        let payloadLength = UInt16(payloadDataSize)
+        
+        
+        data.append(UInt8((payloadLength >> 8) & 0xFF))
+        data.append(UInt8(payloadLength & 0xFF))
+        
+        // SenderID (exactly 8 bytes)
         let senderBytes = packet.senderID.prefix(senderIDSize)
         data.append(senderBytes)
         if senderBytes.count < senderIDSize {
             data.append(Data(repeating: 0, count: senderIDSize - senderBytes.count))
         }
-
+        
+        // RecipientID (if present)
         if let recipientID = packet.recipientID {
             let recipientBytes = recipientID.prefix(recipientIDSize)
             data.append(recipientBytes)
@@ -211,30 +189,30 @@ struct BinaryProtocol {
                 data.append(Data(repeating: 0, count: recipientIDSize - recipientBytes.count))
             }
         }
-
+        
+        // Payload (with original size prepended if compressed)
         if isCompressed, let originalSize = originalPayloadSize {
-            if version == 2 {
+            // Prepend original size (2 bytes, big-endian)
-                let value = UInt32(originalSize)
+            data.append(UInt8((originalSize >> 8) & 0xFF))
-                for shift in stride(from: 24, through: 0, by: -8) {
+            data.append(UInt8(originalSize & 0xFF))
-                    data.append(UInt8((value >> UInt32(shift)) & 0xFF))
-                }
-            } else {
-                let value = UInt16(originalSize)
-                data.append(UInt8((value >> 8) & 0xFF))
-                data.append(UInt8(value & 0xFF))
-            }
         }
         data.append(payload)
-
+        
+        // Signature (if present)
         if let signature = packet.signature {
             data.append(signature.prefix(signatureSize))
         }
-
+        
+        
+        // Apply padding to standard block sizes for traffic analysis resistance
         if padding {
             let optimalSize = MessagePadding.optimalBlockSize(for: data.count)
-            return MessagePadding.pad(data, toSize: optimalSize)
+            let paddedData = MessagePadding.pad(data, toSize: optimalSize)
+            return paddedData
+        } else {
+            // Caller explicitly requested no padding (e.g., BLE write path)
+            return data
         }
-        return data
     }
     
     // Decode binary data to BitchatPacket
@@ -249,113 +227,87 @@ struct BinaryProtocol {
 
     // Core decoding implementation used by decode(_:) with and without padding removal
     private static func decodeCore(_ raw: Data) -> BitchatPacket? {
-        guard raw.count >= v1HeaderSize + senderIDSize else { return nil }
+        // Minimum size: header + senderID
+        guard raw.count >= headerSize + senderIDSize else { return nil }
 
         return raw.withUnsafeBytes { (buf: UnsafeRawBufferPointer) -> BitchatPacket? in
             guard let base = buf.baseAddress else { return nil }
             var offset = 0
             func require(_ n: Int) -> Bool { offset + n <= buf.count }
+            // Read single byte
             func read8() -> UInt8? {
                 guard require(1) else { return nil }
-                let value = base.advanced(by: offset).assumingMemoryBound(to: UInt8.self).pointee
+                let v = base.advanced(by: offset).assumingMemoryBound(to: UInt8.self).pointee
                 offset += 1
-                return value
+                return v
             }
+            // Read big-endian 16-bit
             func read16() -> UInt16? {
                 guard require(2) else { return nil }
-                let ptr = base.advanced(by: offset).assumingMemoryBound(to: UInt8.self)
+                let p = base.advanced(by: offset).assumingMemoryBound(to: UInt8.self)
-                let value = (UInt16(ptr[0]) << 8) | UInt16(ptr[1])
+                let v = (UInt16(p[0]) << 8) | UInt16(p[1])
                 offset += 2
-                return value
+                return v
-            }
-            func read32() -> UInt32? {
-                guard require(4) else { return nil }
-                let ptr = base.advanced(by: offset).assumingMemoryBound(to: UInt8.self)
-                let value = (UInt32(ptr[0]) << 24) | (UInt32(ptr[1]) << 16) | (UInt32(ptr[2]) << 8) | UInt32(ptr[3])
-                offset += 4
-                return value
             }
+            // Copy N bytes into Data
             func readData(_ n: Int) -> Data? {
                 guard require(n) else { return nil }
                 let ptr = base.advanced(by: offset)
-                let data = Data(bytes: ptr, count: n)
+                let d = Data(bytes: ptr, count: n)
                 offset += n
-                return data
+                return d
             }
 
-            guard let version = read8(), version == 1 || version == 2 else { return nil }
+            // Version
-            let lengthFieldBytes = lengthFieldSize(for: version)
+            guard let version = read8(), version == 1 else { return nil }
-            guard let headerSize = headerSize(for: version) else { return nil }
+            guard let type = read8() else { return nil }
-            let minimumRequired = headerSize + senderIDSize
+            guard let ttl = read8() else { return nil }
-            guard raw.count >= minimumRequired else { return nil }
 
-            guard let type = read8(), let ttl = read8() else { return nil }
+            // Timestamp 8 bytes BE
-
+            guard require(8) else { return nil }
-            var timestamp: UInt64 = 0
+            var ts: UInt64 = 0
             for _ in 0..<8 {
-                guard let byte = read8() else { return nil }
+                guard let b = read8() else { return nil }
-                timestamp = (timestamp << 8) | UInt64(byte)
+                ts = (ts << 8) | UInt64(b)
             }
 
+            // Flags
             guard let flags = read8() else { return nil }
             let hasRecipient = (flags & Flags.hasRecipient) != 0
             let hasSignature = (flags & Flags.hasSignature) != 0
             let isCompressed = (flags & Flags.isCompressed) != 0
 
-            let payloadLength: Int
+            // Payload length
-            if version == 2 {
+            guard let payloadLen = read16(), payloadLen <= 65535 else { return nil }
-                guard let len = read32() else { return nil }
-                payloadLength = Int(len)
-            } else {
-                guard let len = read16() else { return nil }
-                payloadLength = Int(len)
-            }
-
-            guard payloadLength >= 0 else { return nil }
 
+            // SenderID
             guard let senderID = readData(senderIDSize) else { return nil }
 
+            // Recipient
             var recipientID: Data? = nil
             if hasRecipient {
                 recipientID = readData(recipientIDSize)
                 if recipientID == nil { return nil }
             }
 
+            // Payload
             let payload: Data
             if isCompressed {
-                guard payloadLength >= lengthFieldBytes else { return nil }
+                // Need original size (2 bytes)
-                let originalSize: Int
+                guard let origSize16 = read16() else { return nil }
-                if version == 2 {
+                let originalSize = Int(origSize16)
-                    guard let rawSize = read32() else { return nil }
+                guard originalSize >= 0 && originalSize <= 1_048_576 else { return nil }
-                    originalSize = Int(rawSize)
+                let compSize = Int(payloadLen) - 2
-                } else {
+                guard compSize >= 0, let compressed = readData(compSize) else { return nil }
-                    guard let rawSize = read16() else { return nil }
-                    originalSize = Int(rawSize)
-                }
-                // Guard to keep decompression bounded to sane BLE payload limits
-                // Use maxFramedFileBytes to account for TLV overhead in file transfer payloads
-                guard originalSize >= 0 && originalSize <= FileTransferLimits.maxFramedFileBytes else { return nil }
-                let compressedSize = payloadLength - lengthFieldBytes
-                guard compressedSize >= 0, let compressed = readData(compressedSize) else { return nil }
-
-                // Validate compression ratio to prevent zip bomb attacks
-                // Primary protection: originalSize capped at 1MB (line 336)
-                // Defense-in-depth: reject extreme ratios (prevents DoS via memory allocation)
-                guard compressedSize > 0 else { return nil }
-                let compressionRatio = Double(originalSize) / Double(compressedSize)
-                guard compressionRatio <= 50_000.0 else {
-                    SecureLogger.warning("🚫 Suspicious compression ratio: \(String(format: "%.0f", compressionRatio)):1", category: .security)
-                    return nil
-                }
-
                 guard let decompressed = CompressionUtil.decompress(compressed, originalSize: originalSize),
                       decompressed.count == originalSize else { return nil }
                 payload = decompressed
             } else {
-                guard let rawPayload = readData(payloadLength) else { return nil }
+                guard let p = readData(Int(payloadLen)) else { return nil }
-                payload = rawPayload
+                payload = p
             }
 
+            // Signature
             var signature: Data? = nil
             if hasSignature {
                 signature = readData(signatureSize)
@@ -368,11 +320,10 @@ struct BinaryProtocol {
                 type: type,
                 senderID: senderID,
                 recipientID: recipientID,
-                timestamp: timestamp,
+                timestamp: ts,
                 payload: payload,
                 signature: signature,
-                ttl: ttl,
+                ttl: ttl
-                version: version
             )
         }
     }

bitchat/Protocols/BitchatFilePacket.swift

@@ -1,155 +0,0 @@
-//
-// BitchatFilePacket.swift
-// bitchat
-//
-// This is free and unencumbered software released into the public domain.
-// For more information, see <https://unlicense.org>
-//
-
-import Foundation
-import BitLogger
-
-/// TLV payload for Bluetooth mesh file transfers (voice notes, images, generic files).
-/// Mirrors the Android client specification to ensure cross-platform interoperability.
-struct BitchatFilePacket {
-    var fileName: String?
-    var fileSize: UInt64?
-    var mimeType: String?
-    var content: Data
-
-    /// Canonical TLV tags defined by the Android implementation.
-    private enum TLVType: UInt8 {
-        case fileName = 0x01
-        case fileSize = 0x02
-        case mimeType = 0x03
-        case content = 0x04
-    }
-
-    /// Encodes the packet using v2 canonical TLVs (4-byte FILE_SIZE, 4-byte CONTENT length).
-    /// Returns `nil` when fields exceed protocol limits (e.g., content > UInt32.max).
-    func encode() -> Data? {
-        let resolvedSize = fileSize ?? UInt64(content.count)
-        guard resolvedSize <= UInt64(UInt32.max) else { return nil }
-        guard resolvedSize <= UInt64(FileTransferLimits.maxPayloadBytes) else { return nil }
-        guard content.count <= Int(UInt32.max) else { return nil }
-        guard FileTransferLimits.isValidPayload(content.count) else { return nil }
-
-        func appendBE<T: FixedWidthInteger>(_ value: T, into data: inout Data) {
-            var big = value.bigEndian
-            withUnsafeBytes(of: &big) { data.append(contentsOf: $0) }
-        }
-
-        var encoded = Data()
-
-        if let name = fileName, let nameData = name.data(using: .utf8), nameData.count <= Int(UInt16.max) {
-            encoded.append(TLVType.fileName.rawValue)
-            appendBE(UInt16(nameData.count), into: &encoded)
-            encoded.append(nameData)
-        }
-
-        encoded.append(TLVType.fileSize.rawValue)
-        appendBE(UInt16(4), into: &encoded)
-        appendBE(UInt32(resolvedSize), into: &encoded)
-
-        if let mime = mimeType, let mimeData = mime.data(using: .utf8), mimeData.count <= Int(UInt16.max) {
-            encoded.append(TLVType.mimeType.rawValue)
-            appendBE(UInt16(mimeData.count), into: &encoded)
-            encoded.append(mimeData)
-        }
-
-        encoded.append(TLVType.content.rawValue)
-        appendBE(UInt32(content.count), into: &encoded)
-        encoded.append(content)
-
-        return encoded
-    }
-
-    /// Decodes TLV payloads, tolerating legacy encodings (FILE_SIZE len=8, CONTENT len=2) when possible.
-    static func decode(_ data: Data) -> BitchatFilePacket? {
-        var cursor = data.startIndex
-        let end = data.endIndex
-
-        var fileName: String?
-        var fileSize: UInt64?
-        var mimeType: String?
-        var content = Data()
-
-        while cursor < end {
-            let typeRaw = data[cursor]
-            cursor = data.index(after: cursor)
-
-            guard cursor <= end else { return nil }
-            let tlvType = TLVType(rawValue: typeRaw)
-
-            func readBigEndianLength(bytes: Int) -> Int? {
-                guard data.distance(from: cursor, to: end) >= bytes else { return nil }
-                // Use UInt64 to prevent integer overflow during shift operations
-                var result: UInt64 = 0
-                for _ in 0..<bytes {
-                    result = (result << 8) | UInt64(data[cursor])
-                    cursor = data.index(after: cursor)
-                }
-                // Safely convert to Int with overflow check
-                guard result <= Int.max else { return nil }
-                return Int(result)
-            }
-
-            let length: Int?
-            if tlvType == .content {
-                let snapshot = cursor
-                let canonical = readBigEndianLength(bytes: 4)
-                if let canonical = canonical,
-                   canonical <= data.distance(from: cursor, to: end) {
-                    length = canonical
-                } else {
-                    cursor = snapshot
-                    length = readBigEndianLength(bytes: 2)
-                }
-            } else {
-                length = readBigEndianLength(bytes: 2)
-            }
-
-            guard let tlvLength = length, tlvLength >= 0 else { return nil }
-            guard data.distance(from: cursor, to: end) >= tlvLength else { return nil }
-
-            let valueStart = cursor
-            cursor = data.index(cursor, offsetBy: tlvLength)
-            let value = data[valueStart..<cursor]
-
-            switch tlvType {
-            case .fileName:
-                fileName = String(data: Data(value), encoding: .utf8)
-            case .fileSize:
-                if tlvLength == 4 || tlvLength == 8 {
-                    var size: UInt64 = 0
-                    for byte in value {
-                        size = (size << 8) | UInt64(byte)
-                    }
-                    if size > UInt64(FileTransferLimits.maxPayloadBytes) {
-                        return nil
-                    }
-                    fileSize = size
-                }
-            case .mimeType:
-                mimeType = String(data: Data(value), encoding: .utf8)
-            case .content:
-                let proposedSize = content.count + value.count
-                if proposedSize > FileTransferLimits.maxPayloadBytes {
-                    return nil
-                }
-                content.append(contentsOf: value)
-            case nil:
-                continue
-            }
-        }
-
-        guard !content.isEmpty else { return nil }
-        guard FileTransferLimits.isValidPayload(content.count) else { return nil }
-        return BitchatFilePacket(
-            fileName: fileName,
-            fileSize: fileSize ?? UInt64(content.count),
-            mimeType: mimeType,
-            content: content
-        )
-    }
-}

bitchat/Protocols/BitchatProtocol.swift

@@ -79,7 +79,6 @@ enum MessageType: UInt8 {
     
     // Fragmentation (simplified)
     case fragment = 0x20        // Single fragment type for large messages
-    case fileTransfer = 0x22    // Binary file/audio/image payloads
     
     var description: String {
         switch self {
@@ -90,7 +89,6 @@ enum MessageType: UInt8 {
         case .noiseHandshake: return "noiseHandshake"
         case .noiseEncrypted: return "noiseEncrypted"
         case .fragment: return "fragment"
-        case .fileTransfer: return "fileTransfer"
         }
     }
 }

bitchat/Protocols/Geohash.swift

@@ -119,57 +119,4 @@ enum Geohash {
         }
         return (latInterval.0, latInterval.1, lonInterval.0, lonInterval.1)
     }
-
-    /// Returns all 8 neighboring geohash cells at the same precision.
-    /// - Parameter geohash: Base32 geohash string.
-    /// - Returns: Array of 8 neighboring geohashes (N, NE, E, SE, S, SW, W, NW order).
-    static func neighbors(of geohash: String) -> [String] {
-        guard !geohash.isEmpty else { return [] }
-
-        let precision = geohash.count
-        let bounds = decodeBounds(geohash)
-        let center = decodeCenter(geohash)
-
-        // Calculate cell dimensions
-        let latHeight = bounds.latMax - bounds.latMin
-        let lonWidth = bounds.lonMax - bounds.lonMin
-
-        // Helper to wrap longitude around ±180
-        func wrapLongitude(_ lon: Double) -> Double {
-            var wrapped = lon
-            while wrapped > 180.0 { wrapped -= 360.0 }
-            while wrapped < -180.0 { wrapped += 360.0 }
-            return wrapped
-        }
-
-        // Helper to clamp latitude to ±90
-        func clampLatitude(_ lat: Double) -> Double {
-            return max(-90.0, min(90.0, lat))
-        }
-
-        // Calculate 8 neighbor centers
-        let neighbors: [(lat: Double, lon: Double)] = [
-            (center.lat + latHeight, center.lon),                    // N
-            (center.lat + latHeight, center.lon + lonWidth),         // NE
-            (center.lat, center.lon + lonWidth),                     // E
-            (center.lat - latHeight, center.lon + lonWidth),         // SE
-            (center.lat - latHeight, center.lon),                    // S
-            (center.lat - latHeight, center.lon - lonWidth),         // SW
-            (center.lat, center.lon - lonWidth),                     // W
-            (center.lat + latHeight, center.lon - lonWidth)          // NW
-        ]
-
-        // Encode each neighbor, handling boundary conditions
-        return neighbors.compactMap { neighbor in
-            let lat = clampLatitude(neighbor.lat)
-            let lon = wrapLongitude(neighbor.lon)
-
-            // Skip if we've crossed a pole (latitude clamped to boundary)
-            if (neighbor.lat > 90.0 || neighbor.lat < -90.0) {
-                return nil
-            }
-
-            return encode(latitude: lat, longitude: lon, precision: precision)
-        }
-    }
 }

bitchat/Services/ColorPaletteService.swift

@@ -0,0 +1,328 @@
+//
+// ColorPaletteService.swift
+// bitchat
+//
+// Manages consistent color assignment for peers using minimal-distance algorithm
+// This is free and unencumbered software released into the public domain.
+//
+
+import Foundation
+import SwiftUI
+
+/// Service that assigns consistent, visually distinct colors to peers
+/// Uses a minimal-distance hue assignment algorithm to maximize color separation
+final class ColorPaletteService {
+
+    // MARK: - Palette State
+
+    private var peerPaletteLight: [String: (slot: Int, ring: Int, hue: Double)] = [:]
+    private var peerPaletteDark: [String: (slot: Int, ring: Int, hue: Double)] = [:]
+    private var peerPaletteSeeds: [String: String] = [:] // peerID -> seed used
+
+    private var nostrPaletteLight: [String: (slot: Int, ring: Int, hue: Double)] = [:]
+    private var nostrPaletteDark: [String: (slot: Int, ring: Int, hue: Double)] = [:]
+    private var nostrPaletteSeeds: [String: String] = [:] // pubkey -> seed used
+
+    // MARK: - Configuration
+
+    private let slotCount: Int
+    private let avoidCenter: Double // Hue to avoid (typically orange for self)
+    private let avoidDelta: Double
+    private let saturationDark: Double
+    private let saturationLight: Double
+    private let baseBrightnessDark: Double
+    private let baseBrightnessLight: Double
+    private let ringDeltaDark: Double
+    private let ringDeltaLight: Double
+
+    // MARK: - Initialization
+
+    init(
+        slotCount: Int = max(8, TransportConfig.uiPeerPaletteSlots),
+        avoidCenter: Double = 30.0 / 360.0, // Orange hue
+        avoidDelta: Double = TransportConfig.uiColorHueAvoidanceDelta,
+        saturationDark: Double = 0.80,
+        saturationLight: Double = 0.70,
+        baseBrightnessDark: Double = 0.75,
+        baseBrightnessLight: Double = 0.45,
+        ringDeltaDark: Double = TransportConfig.uiPeerPaletteRingBrightnessDeltaDark,
+        ringDeltaLight: Double = TransportConfig.uiPeerPaletteRingBrightnessDeltaLight
+    ) {
+        self.slotCount = slotCount
+        self.avoidCenter = avoidCenter
+        self.avoidDelta = avoidDelta
+        self.saturationDark = saturationDark
+        self.saturationLight = saturationLight
+        self.baseBrightnessDark = baseBrightnessDark
+        self.baseBrightnessLight = baseBrightnessLight
+        self.ringDeltaDark = ringDeltaDark
+        self.ringDeltaLight = ringDeltaLight
+    }
+
+    // MARK: - Public API
+
+    /// Get color for a mesh peer
+    func colorForMeshPeer(
+        peerID: String,
+        isDark: Bool,
+        myPeerID: String,
+        allPeers: [BitchatPeer],
+        getNoiseKeyForShortID: (String) -> String?
+    ) -> Color {
+        // Ensure palette is up to date
+        rebuildPeerPaletteIfNeeded(
+            myPeerID: myPeerID,
+            allPeers: allPeers,
+            getNoiseKeyForShortID: getNoiseKeyForShortID
+        )
+
+        let entry = (isDark ? peerPaletteDark[peerID] : peerPaletteLight[peerID])
+        let orange = Color.orange
+        if peerID == myPeerID { return orange }
+
+        let saturation: Double = isDark ? saturationDark : saturationLight
+        let baseBrightness: Double = isDark ? baseBrightnessDark : baseBrightnessLight
+        let ringDelta = isDark ? ringDeltaDark : ringDeltaLight
+
+        if let e = entry {
+            let brightness = min(1.0, max(0.0, baseBrightness + ringDelta * Double(e.ring)))
+            return Color(hue: e.hue, saturation: saturation, brightness: brightness)
+        }
+
+        // Fallback to seed color if not in palette
+        let seed = meshSeed(for: peerID, getNoiseKeyForShortID: getNoiseKeyForShortID)
+        return Color(peerSeed: seed, isDark: isDark)
+    }
+
+    /// Get color for a Nostr participant
+    func colorForNostrPubkey(
+        pubkeyHexLowercased: String,
+        isDark: Bool,
+        myNostrPubkey: String?,
+        geohashPeople: [(id: String, seed: String)]
+    ) -> Color {
+        rebuildNostrPaletteIfNeeded(
+            myNostrPubkey: myNostrPubkey,
+            geohashPeople: geohashPeople
+        )
+
+        let entry = (isDark ? nostrPaletteDark[pubkeyHexLowercased] : nostrPaletteLight[pubkeyHexLowercased])
+        if let me = myNostrPubkey, pubkeyHexLowercased == me { return .orange }
+
+        let saturation: Double = isDark ? saturationDark : saturationLight
+        let baseBrightness: Double = isDark ? baseBrightnessDark : baseBrightnessLight
+        let ringDelta = isDark ? ringDeltaDark : ringDeltaLight
+
+        if let e = entry {
+            let brightness = min(1.0, max(0.0, baseBrightness + ringDelta * Double(e.ring)))
+            return Color(hue: e.hue, saturation: saturation, brightness: brightness)
+        }
+
+        // Fallback to seed color
+        return Color(peerSeed: "nostr:" + pubkeyHexLowercased, isDark: isDark)
+    }
+
+    /// Get color for a message sender (auto-detects type)
+    func peerColor(
+        for message: BitchatMessage,
+        isDark: Bool,
+        myPeerID: String,
+        myNostrPubkey: String?,
+        nostrKeyMapping: [String: String],
+        allPeers: [BitchatPeer],
+        geohashPeople: [(id: String, seed: String)],
+        getNoiseKeyForShortID: (String) -> String?
+    ) -> Color {
+        if let spid = message.senderPeerID?.id {
+            if spid.hasPrefix("nostr:") || spid.hasPrefix("nostr_") {
+                let bare: String = {
+                    if spid.hasPrefix("nostr:") { return String(spid.dropFirst(6)) }
+                    if spid.hasPrefix("nostr_") { return String(spid.dropFirst(6)) }
+                    return spid
+                }()
+                let full = nostrKeyMapping[spid]?.lowercased() ?? bare.lowercased()
+                return colorForNostrPubkey(
+                    pubkeyHexLowercased: full,
+                    isDark: isDark,
+                    myNostrPubkey: myNostrPubkey,
+                    geohashPeople: geohashPeople
+                )
+            } else if spid.count == 16 {
+                return colorForMeshPeer(
+                    peerID: spid,
+                    isDark: isDark,
+                    myPeerID: myPeerID,
+                    allPeers: allPeers,
+                    getNoiseKeyForShortID: getNoiseKeyForShortID
+                )
+            } else {
+                return colorForMeshPeer(
+                    peerID: spid.lowercased(),
+                    isDark: isDark,
+                    myPeerID: myPeerID,
+                    allPeers: allPeers,
+                    getNoiseKeyForShortID: getNoiseKeyForShortID
+                )
+            }
+        }
+        // Fallback when we only have a display name
+        return Color(peerSeed: message.sender.lowercased(), isDark: isDark)
+    }
+
+    /// Reset all palette state (useful for testing)
+    func reset() {
+        peerPaletteLight.removeAll()
+        peerPaletteDark.removeAll()
+        peerPaletteSeeds.removeAll()
+        nostrPaletteLight.removeAll()
+        nostrPaletteDark.removeAll()
+        nostrPaletteSeeds.removeAll()
+    }
+
+    // MARK: - Private Helpers
+
+    private func meshSeed(for peerID: String, getNoiseKeyForShortID: (String) -> String?) -> String {
+        if let full = getNoiseKeyForShortID(peerID)?.lowercased() {
+            return "noise:" + full
+        }
+        return peerID.lowercased()
+    }
+
+    private func rebuildPeerPaletteIfNeeded(
+        myPeerID: String,
+        allPeers: [BitchatPeer],
+        getNoiseKeyForShortID: (String) -> String?
+    ) {
+        // Build current peer->seed map (excluding self)
+        var currentSeeds: [String: String] = [:]
+        for p in allPeers where p.peerID.id != myPeerID {
+            currentSeeds[p.peerID.id] = meshSeed(for: p.peerID.id, getNoiseKeyForShortID: getNoiseKeyForShortID)
+        }
+
+        // If seeds unchanged and palette exists for both themes, skip
+        if currentSeeds == peerPaletteSeeds,
+           peerPaletteLight.keys.count == currentSeeds.count,
+           peerPaletteDark.keys.count == currentSeeds.count {
+            return
+        }
+        peerPaletteSeeds = currentSeeds
+
+        // Generate palette
+        let mapping = assignColorsMinimalDistance(seeds: currentSeeds, previousMapping: peerPaletteLight)
+        peerPaletteLight = mapping
+        peerPaletteDark = mapping
+    }
+
+    private func rebuildNostrPaletteIfNeeded(
+        myNostrPubkey: String?,
+        geohashPeople: [(id: String, seed: String)]
+    ) {
+        // Build seeds map from currently visible geohash people (excluding self)
+        var currentSeeds: [String: String] = [:]
+        for p in geohashPeople where p.id != myNostrPubkey {
+            currentSeeds[p.id] = p.seed
+        }
+
+        if currentSeeds == nostrPaletteSeeds,
+           nostrPaletteLight.keys.count == currentSeeds.count,
+           nostrPaletteDark.keys.count == currentSeeds.count {
+            return
+        }
+        nostrPaletteSeeds = currentSeeds
+
+        let mapping = assignColorsMinimalDistance(seeds: currentSeeds, previousMapping: nostrPaletteLight)
+        nostrPaletteLight = mapping
+        nostrPaletteDark = mapping
+    }
+
+    // MARK: - Minimal-Distance Color Assignment Algorithm
+
+    private func assignColorsMinimalDistance(
+        seeds: [String: String],
+        previousMapping: [String: (slot: Int, ring: Int, hue: Double)]
+    ) -> [String: (slot: Int, ring: Int, hue: Double)] {
+        // Generate evenly spaced hue slots avoiding self-orange range
+        var slots: [Double] = []
+        for i in 0..<slotCount {
+            let hue = Double(i) / Double(slotCount)
+            if abs(hue - avoidCenter) < avoidDelta { continue }
+            slots.append(hue)
+        }
+        if slots.isEmpty {
+            // Safety: if avoidance consumed all (shouldn't happen), fall back to full slots
+            for i in 0..<slotCount { slots.append(Double(i) / Double(slotCount)) }
+        }
+
+        // Helper to compute circular distance
+        func circDist(_ a: Double, _ b: Double) -> Double {
+            let d = abs(a - b)
+            return d > 0.5 ? 1.0 - d : d
+        }
+
+        // Assign slots to peers to maximize minimal distance, deterministically
+        let peers = seeds.keys.sorted() // stable order
+
+        // Preferred slot index by seed (wrapping to available slots)
+        let prefIndex: [String: Int] = Dictionary(uniqueKeysWithValues: peers.map { id in
+            let h = (seeds[id] ?? id).djb2()
+            let idx = Int(h % UInt64(slots.count))
+            return (id, idx)
+        })
+
+        var mapping: [String: (slot: Int, ring: Int, hue: Double)] = [:]
+        var usedSlots = Set<Int>()
+        var usedHues: [Double] = []
+
+        // Keep previous assignments if still valid to minimize churn
+        for (id, entry) in previousMapping {
+            if seeds.keys.contains(id), entry.slot < slots.count { // slot index still valid
+                mapping[id] = (entry.slot, entry.ring, slots[entry.slot])
+                usedSlots.insert(entry.slot)
+                usedHues.append(slots[entry.slot])
+            }
+        }
+
+        // First ring assignment using free slots
+        let unassigned = peers.filter { mapping[$0] == nil }
+        for id in unassigned {
+            // If a preferred slot free, take it
+            let preferred = prefIndex[id] ?? 0
+            if !usedSlots.contains(preferred) && preferred < slots.count {
+                mapping[id] = (preferred, 0, slots[preferred])
+                usedSlots.insert(preferred)
+                usedHues.append(slots[preferred])
+                continue
+            }
+            // Choose free slot maximizing minimal distance to used hues
+            var bestSlot: Int? = nil
+            var bestScore: Double = -1
+            for sIdx in 0..<slots.count where !usedSlots.contains(sIdx) {
+                let hue = slots[sIdx]
+                let minDist = usedHues.isEmpty ? 1.0 : usedHues.map { circDist(hue, $0) }.min() ?? 1.0
+                // Bias toward preferred index for stability
+                let bias = 1.0 - (Double((abs(sIdx - (prefIndex[id] ?? 0)) % slots.count)) / Double(slots.count))
+                let score = minDist + 0.05 * bias
+                if score > bestScore { bestScore = score; bestSlot = sIdx }
+            }
+            if let s = bestSlot {
+                mapping[id] = (s, 0, slots[s])
+                usedSlots.insert(s)
+                usedHues.append(slots[s])
+            }
+        }
+
+        // Overflow peers: assign additional rings by reusing slots with stable preference
+        let stillUnassigned = peers.filter { mapping[$0] == nil }
+        if !stillUnassigned.isEmpty {
+            for (idx, id) in stillUnassigned.enumerated() {
+                let preferred = prefIndex[id] ?? 0
+                // Spread over slots by rotating from preferred with a golden-step
+                let goldenStep = 7 // small prime step for dispersion
+                let s = (preferred + idx * goldenStep) % slots.count
+                mapping[id] = (s, 1, slots[s])
+            }
+        }
+
+        return mapping
+    }
+}

bitchat/Services/CommandProcessor.swift

@@ -42,7 +42,7 @@ final class CommandProcessor {
             case .location: return true
             }
         }()
-        let inGeoDM = chatViewModel?.selectedPrivateChatPeer?.isGeoDM == true
+        let inGeoDM = (chatViewModel?.selectedPrivateChatPeer?.hasPrefix("nostr_") == true)
 
         switch cmd {
         case "/m", "/msg":
@@ -65,11 +65,14 @@ final class CommandProcessor {
         case "/unfav":
             if inGeoPublic || inGeoDM { return .error(message: "favorites are only for mesh peers in #mesh") }
             return handleFavorite(args, add: false)
+        //
+        case "/help", "/h":
+            return .error(message: "unknown command: \(cmd)")
         default:
             return .error(message: "unknown command: \(cmd)")
         }
     }
-
+    
     // MARK: - Command Handlers
     
     private func handleMessage(_ args: String) -> CommandResult {
@@ -101,7 +104,7 @@ final class CommandProcessor {
         case .location(let ch):
             // Geohash context: show visible geohash participants (exclude self)
             guard let vm = chatViewModel else { return .success(message: "nobody around") }
-            let myHex = (try? chatViewModel?.idBridge.deriveIdentity(forGeohash: ch.geohash))?.publicKeyHex.lowercased()
+            let myHex = (try? NostrIdentityBridge.deriveIdentity(forGeohash: ch.geohash))?.publicKeyHex.lowercased()
             let people = vm.visibleGeohashPeople().filter { person in
                 if let me = myHex { return person.id.lowercased() != me }
                 return true
@@ -145,9 +148,9 @@ final class CommandProcessor {
         
         if chatViewModel?.selectedPrivateChatPeer != nil {
             // In private chat
-            if let peerNickname = meshService?.peerNickname(peerID: targetPeerID) {
+            if let peerNickname = meshService?.peerNickname(peerID: PeerID(str: targetPeerID)) {
                 let personalMessage = "* \(emoji) \(myNickname) \(action) you\(suffix) *"
-                meshService?.sendPrivateMessage(personalMessage, to: targetPeerID,
+                meshService?.sendPrivateMessage(personalMessage, to: PeerID(str: targetPeerID),
                                                recipientNickname: peerNickname,
                                                messageID: UUID().uuidString)
                 // Also add a local system message so the sender sees a natural-language confirmation
@@ -211,7 +214,7 @@ final class CommandProcessor {
         let nickname = targetName.hasPrefix("@") ? String(targetName.dropFirst()) : targetName
         
         if let peerID = chatViewModel?.getPeerIDForNickname(nickname),
-           let fingerprint = meshService?.getFingerprint(for: peerID) {
+           let fingerprint = meshService?.getFingerprint(for: PeerID(str: peerID)) {
             if identityManager.isBlocked(fingerprint: fingerprint) {
                 return .success(message: "\(nickname) is already blocked")
             }
@@ -255,7 +258,7 @@ final class CommandProcessor {
         let nickname = targetName.hasPrefix("@") ? String(targetName.dropFirst()) : targetName
         
         if let peerID = chatViewModel?.getPeerIDForNickname(nickname),
-           let fingerprint = meshService?.getFingerprint(for: peerID) {
+           let fingerprint = meshService?.getFingerprint(for: PeerID(str: peerID)) {
             if !identityManager.isBlocked(fingerprint: fingerprint) {
                 return .success(message: "\(nickname) is not blocked")
             }
@@ -282,7 +285,7 @@ final class CommandProcessor {
         let nickname = targetName.hasPrefix("@") ? String(targetName.dropFirst()) : targetName
         
         guard let peerID = chatViewModel?.getPeerIDForNickname(nickname),
-              let noisePublicKey = Data(hexString: peerID.id) else {
+              let noisePublicKey = Data(hexString: peerID) else {
             return .error(message: "can't find peer: \(nickname)")
         }
         
@@ -308,4 +311,19 @@ final class CommandProcessor {
         }
     }
     
+    private func handleHelp() -> CommandResult {
+        let helpText = """
+        commands:
+        /msg @name - start private chat
+        /who - list who's online
+        /clear - clear messages
+        /hug @name - send a hug
+        /slap @name - slap with a trout
+        /fav @name - add to favorites
+        /unfav @name - remove from favorites
+        /block @name - block
+        /unblock @name - unblock
+        """
+        return .success(message: helpText)
+    }
 }

bitchat/Services/DeliveryTrackingService.swift

@@ -0,0 +1,73 @@
+//
+// DeliveryTrackingService.swift
+// bitchat
+//
+// Service for tracking message delivery and read status
+// This is free and unencumbered software released into the public domain.
+//
+
+import BitLogger
+import Foundation
+
+/// Service that manages delivery status updates for messages
+/// Prevents status downgrades (e.g., read → delivered) and maintains consistency
+final class DeliveryTrackingService {
+
+    // MARK: - Public API
+
+    /// Update delivery status for a message, preventing downgrades
+    /// - Parameters:
+    ///   - messageID: The message ID to update
+    ///   - status: The new delivery status
+    ///   - messages: Array of public messages (inout for mutation)
+    ///   - privateChats: Dictionary of private chats (inout for mutation)
+    ///   - notifyChange: Closure to trigger UI update
+    func updateStatus(
+        messageID: String,
+        status: DeliveryStatus,
+        messages: inout [BitchatMessage],
+        privateChats: inout [String: [BitchatMessage]],
+        notifyChange: @escaping () -> Void
+    ) {
+        // Update in main messages
+        if let index = messages.firstIndex(where: { $0.id == messageID }) {
+            let currentStatus = messages[index].deliveryStatus
+            if !shouldSkipUpdate(currentStatus: currentStatus, newStatus: status) {
+                messages[index].deliveryStatus = status
+            }
+        }
+
+        // Update in private chats
+        for (peerID, chatMessages) in privateChats {
+            guard let index = chatMessages.firstIndex(where: { $0.id == messageID }) else { continue }
+
+            let currentStatus = chatMessages[index].deliveryStatus
+            guard !shouldSkipUpdate(currentStatus: currentStatus, newStatus: status) else { continue }
+
+            // Update delivery status
+            privateChats[peerID]?[index].deliveryStatus = status
+        }
+
+        // Trigger UI update
+        DispatchQueue.main.async {
+            notifyChange()
+        }
+    }
+
+    // MARK: - Private Helpers
+
+    /// Check if we should skip a status update to prevent downgrades
+    private func shouldSkipUpdate(currentStatus: DeliveryStatus?, newStatus: DeliveryStatus) -> Bool {
+        guard let current = currentStatus else { return false }
+
+        // Don't downgrade from read to delivered or sent
+        switch (current, newStatus) {
+        case (.read, .delivered):
+            return true
+        case (.read, .sent):
+            return true
+        default:
+            return false
+        }
+    }
+}

bitchat/Services/FavoritesPersistenceService.swift

@@ -26,7 +26,6 @@ final class FavoritesPersistenceService: ObservableObject {
 
     private static let storageKey = "chat.bitchat.favorites"
     private static let keychainService = "chat.bitchat.favorites"
-    private let keychain: KeychainHelperProtocol
     
     @Published private(set) var favorites: [Data: FavoriteRelationship] = [:] // Noise pubkey -> relationship
     @Published private(set) var mutualFavorites: Set<Data> = []
@@ -36,8 +35,7 @@ final class FavoritesPersistenceService: ObservableObject {
     
     static let shared = FavoritesPersistenceService()
     
-    init(keychain: KeychainHelperProtocol = KeychainHelper()) {
+    private init() {
-        self.keychain = keychain
         loadFavorites()
         
         // Update mutual favorites when favorites change
@@ -47,7 +45,13 @@ final class FavoritesPersistenceService: ObservableObject {
             }
             .assign(to: &$mutualFavorites)
     }
-    
+
+    deinit {
+        // Clean up Combine subscriptions
+        cancellables.removeAll()
+        SecureLogger.debug("FavoritesPersistenceService deinitialized", category: .session)
+    }
+
     /// Add or update a favorite
     func addFavorite(
         peerNoisePublicKey: Data,
@@ -198,7 +202,7 @@ final class FavoritesPersistenceService: ObservableObject {
         saveFavorites()
         
         // Delete from keychain directly
-        keychain.delete(
+        KeychainHelper.delete(
             key: Self.storageKey,
             service: Self.keychainService
         )
@@ -218,11 +222,10 @@ final class FavoritesPersistenceService: ObservableObject {
             let data = try encoder.encode(relationships)
             
             // Store in keychain for security
-            keychain.save(
+            KeychainHelper.save(
                 key: Self.storageKey,
                 data: data,
-                service: Self.keychainService,
+                service: Self.keychainService
-                accessible: nil
             )
             
             // Successfully saved favorites
@@ -234,7 +237,7 @@ final class FavoritesPersistenceService: ObservableObject {
     private func loadFavorites() {
         // Loading favorites from keychain
         
-        guard let data = keychain.load(
+        guard let data = KeychainHelper.load(
             key: Self.storageKey,
             service: Self.keychainService
         ) else { 

bitchat/Services/GeohashBookmarksStore.swift

@@ -1,8 +1,7 @@
+import BitLogger
 import Foundation
 import Combine
-#if os(iOS) || os(macOS)
 import CoreLocation
-#endif
 
 /// Stores a user-maintained list of bookmarked geohash channels.
 /// - Persistence: UserDefaults (JSON string array)
@@ -16,10 +15,8 @@ final class GeohashBookmarksStore: ObservableObject {
     private let storeKey = "locationChannel.bookmarks"
     private let namesStoreKey = "locationChannel.bookmarkNames"
     private var membership: Set<String> = []
-    #if os(iOS) || os(macOS)
     private let geocoder = CLGeocoder()
     private var resolving: Set<String> = []
-    #endif
     
     private let storage: UserDefaults
 
@@ -28,6 +25,12 @@ final class GeohashBookmarksStore: ObservableObject {
         load()
     }
 
+    deinit {
+        // Cancel any pending geocoding operations
+        geocoder.cancelGeocode()
+        SecureLogger.debug("GeohashBookmarksStore deinitialized", category: .session)
+    }
+
     // MARK: - Public API
     func isBookmarked(_ geohash: String) -> Bool {
         return membership.contains(Self.normalize(geohash))
@@ -118,7 +121,6 @@ final class GeohashBookmarksStore: ObservableObject {
         let gh = Self.normalize(geohash)
         guard !gh.isEmpty else { return }
         if bookmarkNames[gh] != nil { return }
-        #if os(iOS) || os(macOS)
         if resolving.contains(gh) { return }
         resolving.insert(gh)
         // For very coarse geohashes, sample multiple points to capture multiple admin areas
@@ -149,10 +151,8 @@ final class GeohashBookmarksStore: ObservableObject {
                 }
             }
         }
-        #endif
     }
 
-    #if os(iOS) || os(macOS)
     private func resolveCompositeAdminName(geohash gh: String, points: [CLLocation]) {
         var uniqueAdmins = OrderedSet<String>()
         var idx = 0
@@ -215,5 +215,15 @@ final class GeohashBookmarksStore: ObservableObject {
             return pm.subLocality ?? pm.locality ?? pm.administrativeArea ?? pm.country
         }
     }
+
+    #if DEBUG
+    /// Testing-only reset helper
+    func _resetForTesting() {
+        bookmarks.removeAll()
+        membership.removeAll()
+        bookmarkNames.removeAll()
+        persist()
+        persistNames()
+    }
     #endif
 }

bitchat/Services/GeohashParticipantsService.swift

@@ -0,0 +1,180 @@
+//
+// GeohashParticipantsService.swift
+// bitchat
+//
+// Manages tracking of participants in geohash-based location channels
+// This is free and unencumbered software released into the public domain.
+//
+
+import BitLogger
+import Foundation
+import Combine
+
+/// Service for tracking and managing participants in geohash channels
+/// Handles automatic expiration, refresh timers, and participant list management
+final class GeohashParticipantsService: ObservableObject {
+
+    // MARK: - Published Properties
+
+    @Published private(set) var geohashPeople: [GeoPerson] = []
+
+    // MARK: - Private State
+
+    private var geoParticipants: [String: [String: Date]] = [:] // geohash -> [pubkeyHex -> lastSeen]
+    private var geoParticipantsTimer: Timer? = nil
+    private var currentGeohash: String? = nil
+
+    // MARK: - Dependencies
+
+    private let identityManager: SecureIdentityStateManagerProtocol
+    private let displayNameProvider: (String) -> String
+
+    // MARK: - Configuration
+
+    private let activityWindowSeconds: TimeInterval
+    private let refreshIntervalSeconds: TimeInterval
+
+    // MARK: - Initialization
+
+    init(
+        identityManager: SecureIdentityStateManagerProtocol,
+        displayNameProvider: @escaping (String) -> String,
+        activityWindowSeconds: TimeInterval = TransportConfig.uiRecentCutoffFiveMinutesSeconds,
+        refreshIntervalSeconds: TimeInterval = 30.0
+    ) {
+        self.identityManager = identityManager
+        self.displayNameProvider = displayNameProvider
+        self.activityWindowSeconds = activityWindowSeconds
+        self.refreshIntervalSeconds = refreshIntervalSeconds
+    }
+
+    deinit {
+        // Note: deinit cannot call @MainActor methods
+        // Timer cleanup will happen automatically when service is deallocated
+        SecureLogger.debug("GeohashParticipantsService deinitialized", category: .session)
+    }
+
+    // MARK: - Public API
+
+    /// Set the current geohash being tracked (starts/stops timer accordingly)
+    func setCurrentGeohash(_ geohash: String?) {
+        if currentGeohash != geohash {
+            currentGeohash = geohash
+            refreshPeopleList()
+
+            if geohash != nil {
+                startTimer()
+            } else {
+                stopTimer()
+            }
+        }
+    }
+
+    /// Record a participant activity in the current geohash
+    func recordParticipant(pubkeyHex: String) {
+        guard let gh = currentGeohash else { return }
+        recordParticipant(pubkeyHex: pubkeyHex, geohash: gh)
+    }
+
+    /// Record a participant activity in a specific geohash
+    func recordParticipant(pubkeyHex: String, geohash: String) {
+        let key = pubkeyHex.lowercased()
+        var map = geoParticipants[geohash] ?? [:]
+        map[key] = Date()
+        geoParticipants[geohash] = map
+
+        // Only refresh list if this geohash is currently selected
+        if currentGeohash == geohash {
+            refreshPeopleList()
+        }
+    }
+
+    /// Get visible people for the current geohash (without mutating state)
+    func visiblePeople() -> [GeoPerson] {
+        guard let gh = currentGeohash else { return [] }
+        return visiblePeople(for: gh)
+    }
+
+    /// Get visible people for a specific geohash
+    func visiblePeople(for geohash: String) -> [GeoPerson] {
+        let cutoff = Date().addingTimeInterval(-activityWindowSeconds)
+        let map = (geoParticipants[geohash] ?? [:])
+            .filter { $0.value >= cutoff }
+            .filter { !identityManager.isNostrBlocked(pubkeyHexLowercased: $0.key) }
+        let people = map
+            .map { (pub, seen) in
+                GeoPerson(id: pub, displayName: displayNameProvider(pub), lastSeen: seen)
+            }
+            .sorted { $0.lastSeen > $1.lastSeen }
+        return people
+    }
+
+    /// Get participant count for a specific geohash (using activity window)
+    func participantCount(for geohash: String) -> Int {
+        let cutoff = Date().addingTimeInterval(-activityWindowSeconds)
+        let map = geoParticipants[geohash] ?? [:]
+        return map.values.filter { $0 >= cutoff }.count
+    }
+
+    /// Remove a participant from all geohashes (e.g., when blocked)
+    func removeParticipant(pubkeyHexLowercased: String) {
+        let hex = pubkeyHexLowercased.lowercased()
+        for (gh, var map) in geoParticipants {
+            map.removeValue(forKey: hex)
+            geoParticipants[gh] = map
+        }
+        refreshPeopleList()
+    }
+
+    /// Clear all participant data (for testing or reset)
+    func reset() {
+        stopTimer()
+        geoParticipants.removeAll()
+        geohashPeople.removeAll()
+        currentGeohash = nil
+    }
+
+    // MARK: - Private Helpers
+
+    private func refreshPeopleList() {
+        guard let gh = currentGeohash else {
+            geohashPeople = []
+            return
+        }
+
+        let cutoff = Date().addingTimeInterval(-activityWindowSeconds)
+        var map = geoParticipants[gh] ?? [:]
+
+        // Prune expired entries
+        map = map.filter { $0.value >= cutoff }
+
+        // Remove blocked Nostr pubkeys
+        map = map.filter { !identityManager.isNostrBlocked(pubkeyHexLowercased: $0.key) }
+
+        // Update cleaned map
+        geoParticipants[gh] = map
+
+        // Build display list
+        let people = map
+            .map { (pub, seen) in
+                GeoPerson(id: pub, displayName: displayNameProvider(pub), lastSeen: seen)
+            }
+            .sorted { $0.lastSeen > $1.lastSeen }
+
+        geohashPeople = people
+    }
+
+    private func startTimer() {
+        stopTimer()
+        geoParticipantsTimer = Timer.scheduledTimer(withTimeInterval: refreshIntervalSeconds, repeats: true) { [weak self] _ in
+            Task { @MainActor in
+                self?.refreshPeopleList()
+            }
+        }
+    }
+
+    private func stopTimer() {
+        geoParticipantsTimer?.invalidate()
+        geoParticipantsTimer = nil
+    }
+}

bitchat/Services/KeychainManager.swift

@@ -27,6 +27,34 @@ final class KeychainManager: KeychainManagerProtocol {
     private let service = BitchatApp.bundleID
     private let appGroup = "group.\(BitchatApp.bundleID)"
     
+    private func isSandboxed() -> Bool {
+        #if os(macOS)
+        // More robust sandbox detection using multiple methods
+        
+        // Method 1: Check environment variable (can be spoofed)
+        let environment = ProcessInfo.processInfo.environment
+        let hasEnvVar = environment["APP_SANDBOX_CONTAINER_ID"] != nil
+        
+        // Method 2: Check if we can access a path outside sandbox
+        let homeDir = FileManager.default.homeDirectoryForCurrentUser
+        let testPath = homeDir.appendingPathComponent("../../../tmp/bitchat_sandbox_test_\(UUID().uuidString)")
+        let canWriteOutsideSandbox = FileManager.default.createFile(atPath: testPath.path, contents: nil, attributes: nil)
+        if canWriteOutsideSandbox {
+            try? FileManager.default.removeItem(at: testPath)
+        }
+        
+        // Method 3: Check container path
+        let containerPath = FileManager.default.urls(for: .libraryDirectory, in: .userDomainMask).first?.path ?? ""
+        let hasContainerPath = containerPath.contains("/Containers/")
+        
+        // If any method indicates sandbox, we consider it sandboxed
+        return hasEnvVar || !canWriteOutsideSandbox || hasContainerPath
+        #else
+        // iOS is always sandboxed
+        return true
+        #endif
+    }
+    
     // MARK: - Identity Keys
     
     func saveIdentityKey(_ keyData: Data, forKey key: String) -> Bool {

bitchat/Services/LocationChannelManager.swift

@@ -64,9 +64,7 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
         switch status {
         case .authorizedAlways, .authorizedWhenInUse, .authorized:
             break // will compute from location
-        case .notDetermined, .restricted, .denied:
+        default:
-            fallthrough
-        @unknown default:
             if case .location(let ch) = selectedChannel {
                 teleported = teleportedSet.contains(ch.geohash)
             }

bitchat/Services/LocationNotesCounter.swift

@@ -0,0 +1,110 @@
+import BitLogger
+import Foundation
+
+struct LocationNotesCounterDependencies {
+    typealias RelayLookup = @MainActor (_ geohash: String, _ count: Int) -> [String]
+    typealias Subscribe = @MainActor (_ filter: NostrFilter, _ id: String, _ relays: [String], _ handler: @escaping (NostrEvent) -> Void, _ onEOSE: (() -> Void)?) -> Void
+    typealias Unsubscribe = @MainActor (_ id: String) -> Void
+
+    var relayLookup: RelayLookup
+    var subscribe: Subscribe
+    var unsubscribe: Unsubscribe
+
+    static let live = LocationNotesCounterDependencies(
+        relayLookup: { geohash, count in
+            GeoRelayDirectory.shared.closestRelays(toGeohash: geohash, count: count)
+        },
+        subscribe: { filter, id, relays, handler, onEOSE in
+            NostrRelayManager.shared.subscribe(
+                filter: filter,
+                id: id,
+                relayUrls: relays,
+                handler: handler,
+                onEOSE: onEOSE
+            )
+        },
+        unsubscribe: { id in
+            NostrRelayManager.shared.unsubscribe(id: id)
+        }
+    )
+}
+
+/// Lightweight background counter for location notes (kind 1) at building-level geohash (8 chars).
+@MainActor
+final class LocationNotesCounter: ObservableObject {
+    static let shared = LocationNotesCounter()
+
+    @Published private(set) var geohash: String? = nil
+    @Published private(set) var count: Int? = 0
+    @Published private(set) var initialLoadComplete: Bool = false
+    @Published private(set) var relayAvailable: Bool = true
+
+    private var subscriptionID: String? = nil
+    private var noteIDs = Set<String>()
+    private let dependencies: LocationNotesCounterDependencies
+
+    private init(dependencies: LocationNotesCounterDependencies = .live) {
+        self.dependencies = dependencies
+    }
+
+    init(testDependencies: LocationNotesCounterDependencies) {
+        self.dependencies = testDependencies
+    }
+
+    deinit {
+        // Note: deinit cannot call @MainActor functions
+        // Subscription cleanup will happen automatically when counter is deallocated
+        SecureLogger.debug("LocationNotesCounter deinitialized", category: .session)
+    }
+
+    func subscribe(geohash gh: String) {
+        let norm = gh.lowercased()
+        if geohash == norm, subscriptionID != nil { return }
+        // Validate geohash (building-level precision: 8 chars)
+        guard Geohash.isValidBuildingGeohash(norm) else {
+            SecureLogger.warning("LocationNotesCounter: rejecting invalid geohash '\(norm)' (expected 8 valid base32 chars)", category: .session)
+            return
+        }
+        // Unsubscribe previous without clearing count to avoid flicker
+        if let sub = subscriptionID { dependencies.unsubscribe(sub) }
+        subscriptionID = nil
+        geohash = norm
+        noteIDs.removeAll()
+        initialLoadComplete = false
+        relayAvailable = true
+
+        // Subscribe only to the building geohash (precision 8)
+        let subID = "locnotes-count-\(norm)-\(UUID().uuidString.prefix(6))"
+        let relays = dependencies.relayLookup(norm, TransportConfig.nostrGeoRelayCount)
+        guard !relays.isEmpty else {
+            relayAvailable = false
+            initialLoadComplete = true
+            count = 0
+            SecureLogger.warning("LocationNotesCounter: no geo relays for geohash=\(norm)", category: .session)
+            return
+        }
+
+        subscriptionID = subID
+        let filter = NostrFilter.geohashNotes(norm, since: nil, limit: 200)
+        dependencies.subscribe(filter, subID, relays, { [weak self] event in
+            guard let self = self else { return }
+            guard event.kind == NostrProtocol.EventKind.textNote.rawValue else { return }
+            guard event.tags.contains(where: { $0.count >= 2 && $0[0].lowercased() == "g" && $0[1].lowercased() == norm }) else { return }
+            if !self.noteIDs.contains(event.id) {
+                self.noteIDs.insert(event.id)
+                self.count = self.noteIDs.count
+            }
+        }, { [weak self] in
+            self?.initialLoadComplete = true
+        })
+    }
+
+    func cancel() {
+        if let sub = subscriptionID { dependencies.unsubscribe(sub) }
+        subscriptionID = nil
+        geohash = nil
+        count = 0
+        noteIDs.removeAll()
+        relayAvailable = true
+    }
+}

bitchat/Services/LocationNotesManager.swift

@@ -14,8 +14,6 @@ struct LocationNotesDependencies {
     var sendEvent: SendEvent
     var deriveIdentity: (_ geohash: String) throws -> NostrIdentity
     var now: () -> Date
-    
-    private static let idBridge = NostrIdentityBridge()
 
     static let live = LocationNotesDependencies(
         relayLookup: { geohash, count in
@@ -37,7 +35,7 @@ struct LocationNotesDependencies {
             NostrRelayManager.shared.sendEvent(event, to: relays)
         },
         deriveIdentity: { geohash in
-            try idBridge.deriveIdentity(forGeohash: geohash)
+            try NostrIdentityBridge.deriveIdentity(forGeohash: geohash)
         },
         now: { Date() }
     )
@@ -103,6 +101,12 @@ final class LocationNotesManager: ObservableObject {
         subscribe()
     }
 
+    deinit {
+        // Note: deinit cannot call @MainActor functions
+        // Subscription cleanup will happen automatically when manager is deallocated
+        SecureLogger.debug("LocationNotesManager deinitialized", category: .session)
+    }
+
     func setGeohash(_ newGeohash: String) {
         let norm = newGeohash.lowercased()
         guard norm != geohash else { return }
@@ -163,22 +167,14 @@ final class LocationNotesManager: ObservableObject {
 
         subscriptionID = subID
         initialLoadComplete = false
-
+        // For persistent notes, allow relays to return recent history without an aggressive time cutoff
-        // Subscribe to center + 8 neighbors (± 1 grid)
+        let filter = NostrFilter.geohashNotes(geohash, since: nil, limit: 200)
-        let neighbors = Geohash.neighbors(of: geohash)
-        let allGeohashes = [geohash] + neighbors
-        let filter = NostrFilter.geohashNotes(allGeohashes, since: nil, limit: 200)
-
-        // Build a set of valid geohashes for tag matching (includes all 9 cells)
-        let validGeohashes = Set(allGeohashes.map { $0.lowercased() })
 
         dependencies.subscribe(filter, subID, relays, { [weak self] event in
             guard let self = self else { return }
             guard event.kind == NostrProtocol.EventKind.textNote.rawValue else { return }
-            // Ensure matching tag - accept any of our 9 geohashes
+            // Ensure matching tag
-            guard event.tags.contains(where: { tag in
+            guard event.tags.contains(where: { $0.count >= 2 && $0[0].lowercased() == "g" && $0[1].lowercased() == self.geohash }) else { return }
-                tag.count >= 2 && tag[0].lowercased() == "g" && validGeohashes.contains(tag[1].lowercased())
-            }) else { return }
             guard !self.noteIDs.contains(event.id) else { return }
             self.noteIDs.insert(event.id)
             let nick = event.tags.first(where: { $0.first?.lowercased() == "n" && $0.count >= 2 })?.dropFirst().first

bitchat/Services/MessageFormattingService.swift

@@ -0,0 +1,618 @@
+//
+// MessageFormattingService.swift
+// bitchat
+//
+// Service for formatting chat messages with syntax highlighting
+// This is free and unencumbered software released into the public domain.
+//
+
+import Foundation
+import SwiftUI
+
+/// Service that formats BitchatMessages into styled AttributedStrings
+/// Handles hashtags, mentions, links, payment tokens, and more
+final class MessageFormattingService {
+
+    // MARK: - Precompiled Regexes
+
+    private enum Regexes {
+        static let hashtag: NSRegularExpression = {
+            try! NSRegularExpression(pattern: "#([a-zA-Z0-9_]+)", options: [])
+        }()
+        static let mention: NSRegularExpression = {
+            try! NSRegularExpression(pattern: "@([\\p{L}0-9_]+(?:#[a-fA-F0-9]{4})?)", options: [])
+        }()
+        static let cashu: NSRegularExpression = {
+            try! NSRegularExpression(pattern: "\\bcashu[AB][A-Za-z0-9._-]{40,}\\b", options: [])
+        }()
+        static let bolt11: NSRegularExpression = {
+            try! NSRegularExpression(pattern: "(?i)\\bln(bc|tb|bcrt)[0-9][a-z0-9]{50,}\\b", options: [])
+        }()
+        static let lnurl: NSRegularExpression = {
+            try! NSRegularExpression(pattern: "(?i)\\blnurl1[a-z0-9]{20,}\\b", options: [])
+        }()
+        static let lightningScheme: NSRegularExpression = {
+            try! NSRegularExpression(pattern: "(?i)\\blightning:[^\\s]+", options: [])
+        }()
+        static let linkDetector: NSDataDetector? = {
+            try? NSDataDetector(types: NSTextCheckingResult.CheckingType.link.rawValue)
+        }()
+        static let quickCashuPresence: NSRegularExpression = {
+            try! NSRegularExpression(pattern: "\\bcashu[AB][A-Za-z0-9._-]{40,}\\b", options: [])
+        }()
+    }
+
+    // MARK: - Dependencies
+
+    private let colorPalette: ColorPaletteService
+
+    // MARK: - Initialization
+
+    init(colorPalette: ColorPaletteService) {
+        self.colorPalette = colorPalette
+    }
+
+    // MARK: - Public API
+
+    /// Format a message with full syntax highlighting (hashtags, mentions, links, payments)
+    /// This is the primary formatter used in the main chat view
+    func formatMessageAsText(
+        _ message: BitchatMessage,
+        colorScheme: ColorScheme,
+        nickname: String,
+        myPeerID: String,
+        myNostrPubkey: String?,
+        activeChannel: ChannelID,
+        nostrKeyMapping: [String: String],
+        allPeers: [BitchatPeer],
+        geohashPeople: [GeoPerson],
+        getNoiseKeyForShortID: @escaping (String) -> String?
+    ) -> AttributedString {
+        // Determine if this message was sent by self
+        let isSelf = isSelfMessage(
+            message,
+            nickname: nickname,
+            myPeerID: myPeerID,
+            myNostrPubkey: myNostrPubkey,
+            activeChannel: activeChannel
+        )
+
+        // Check cache first
+        let isDark = colorScheme == .dark
+        if let cachedText = message.getCachedFormattedText(isDark: isDark, isSelf: isSelf) {
+            return cachedText
+        }
+
+        // Not cached, format the message
+        var result = AttributedString()
+
+        let baseColor: Color = isSelf ? .orange : colorPalette.peerColor(
+            for: message,
+            isDark: isDark,
+            myPeerID: myPeerID,
+            myNostrPubkey: myNostrPubkey,
+            nostrKeyMapping: nostrKeyMapping,
+            allPeers: allPeers,
+            geohashPeople: geohashPeople.map { (id: $0.id, seed: "nostr:" + $0.id) },
+            getNoiseKeyForShortID: getNoiseKeyForShortID
+        )
+
+        if message.sender != "system" {
+            // Sender (at the beginning) with light-gray suffix styling if present
+            let (baseName, suffix) = message.sender.splitSuffix()
+            var senderStyle = AttributeContainer()
+            senderStyle.foregroundColor = baseColor
+            let fontWeight: Font.Weight = isSelf ? .bold : .medium
+            senderStyle.font = .bitchatSystem(size: 14, weight: fontWeight, design: .monospaced)
+
+            // Make sender clickable: encode senderPeerID into a custom URL
+            if let spid = message.senderPeerID?.id,
+               let url = URL(string: "bitchat://user/\(spid.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed) ?? spid)") {
+                senderStyle.link = url
+            }
+
+            // Format: <@name#suffix>
+            result.append(AttributedString("<@").mergingAttributes(senderStyle))
+            result.append(AttributedString(baseName).mergingAttributes(senderStyle))
+            if !suffix.isEmpty {
+                var suffixStyle = senderStyle
+                suffixStyle.foregroundColor = baseColor.opacity(0.6)
+                result.append(AttributedString(suffix).mergingAttributes(suffixStyle))
+            }
+            result.append(AttributedString("> ").mergingAttributes(senderStyle))
+
+            // Process content with syntax highlighting
+            let content = message.content
+            let nsContent = content as NSString
+            let nsLen = nsContent.length
+
+            // Check for Cashu presence early to decide rendering strategy
+            let containsCashuEarly = Regexes.quickCashuPresence.numberOfMatches(
+                in: content,
+                options: [],
+                range: NSRange(location: 0, length: nsLen)
+            ) > 0
+
+            // For extremely long content, render as plain text (unless has Cashu)
+            if (content.count > 4000 || content.hasVeryLongToken(threshold: 1024)) && !containsCashuEarly {
+                var plainStyle = AttributeContainer()
+                plainStyle.foregroundColor = baseColor
+                plainStyle.font = isSelf
+                    ? .bitchatSystem(size: 14, weight: .bold, design: .monospaced)
+                    : .bitchatSystem(size: 14, design: .monospaced)
+                result.append(AttributedString(content).mergingAttributes(plainStyle))
+            } else {
+                // Full syntax highlighting
+                result.append(formatContent(
+                    content,
+                    nsContent: nsContent,
+                    nsLen: nsLen,
+                    message: message,
+                    baseColor: baseColor,
+                    isSelf: isSelf,
+                    isDark: isDark,
+                    nickname: nickname,
+                    myPeerID: myPeerID,
+                    myNostrPubkey: myNostrPubkey,
+                    activeChannel: activeChannel
+                ))
+            }
+
+            // Add timestamp
+            let timestamp = AttributedString(" [\(message.formattedTimestamp)]")
+            var timestampStyle = AttributeContainer()
+            timestampStyle.foregroundColor = Color.gray.opacity(0.7)
+            timestampStyle.font = .bitchatSystem(size: 10, design: .monospaced)
+            result.append(timestamp.mergingAttributes(timestampStyle))
+        } else {
+            // System message
+            var contentStyle = AttributeContainer()
+            contentStyle.foregroundColor = Color.gray
+            let content = AttributedString("* \(message.content) *")
+            contentStyle.font = .bitchatSystem(size: 12, design: .monospaced).italic()
+            result.append(content.mergingAttributes(contentStyle))
+
+            // Add timestamp
+            let timestamp = AttributedString(" [\(message.formattedTimestamp)]")
+            var timestampStyle = AttributeContainer()
+            timestampStyle.foregroundColor = Color.gray.opacity(0.5)
+            timestampStyle.font = .bitchatSystem(size: 10, design: .monospaced)
+            result.append(timestamp.mergingAttributes(timestampStyle))
+        }
+
+        // Cache the formatted text
+        message.setCachedFormattedText(result, isDark: isDark, isSelf: isSelf)
+
+        return result
+    }
+
+    /// Simpler message formatter (used in legacy contexts)
+    func formatMessage(
+        _ message: BitchatMessage,
+        colorScheme: ColorScheme,
+        nickname: String
+    ) -> AttributedString {
+        var result = AttributedString()
+
+        let isDark = colorScheme == .dark
+        let primaryColor = isDark ? Color.green : Color(red: 0, green: 0.5, blue: 0)
+
+        if message.sender == "system" {
+            let content = AttributedString("* \(message.content) *")
+            var contentStyle = AttributeContainer()
+            contentStyle.foregroundColor = Color.gray
+            contentStyle.font = .bitchatSystem(size: 12, design: .monospaced).italic()
+            result.append(content.mergingAttributes(contentStyle))
+
+            // Add timestamp
+            let timestamp = AttributedString(" [\(message.formattedTimestamp)]")
+            var timestampStyle = AttributeContainer()
+            timestampStyle.foregroundColor = Color.gray.opacity(0.5)
+            timestampStyle.font = .bitchatSystem(size: 10, design: .monospaced)
+            result.append(timestamp.mergingAttributes(timestampStyle))
+        } else {
+            let sender = AttributedString("<@\(message.sender)> ")
+            var senderStyle = AttributeContainer()
+            senderStyle.foregroundColor = primaryColor
+            let fontWeight: Font.Weight = message.sender == nickname ? .bold : .medium
+            senderStyle.font = .bitchatSystem(size: 12, weight: fontWeight, design: .monospaced)
+            result.append(sender.mergingAttributes(senderStyle))
+
+            // Process content to highlight mentions
+            let contentText = message.content
+            let pattern = "@([\\p{L}0-9_]+)"
+            let regex = try? NSRegularExpression(pattern: pattern, options: [])
+            let nsContent = contentText as NSString
+            let nsLen = nsContent.length
+            let matches = regex?.matches(in: contentText, options: [], range: NSRange(location: 0, length: nsLen)) ?? []
+
+            var processedContent = AttributedString()
+            var lastEndIndex = contentText.startIndex
+
+            for match in matches {
+                if let range = Range(match.range(at: 0), in: contentText) {
+                    // Add text before mention
+                    if lastEndIndex < range.lowerBound {
+                        let beforeText = String(contentText[lastEndIndex..<range.lowerBound])
+                        if !beforeText.isEmpty {
+                            var normalStyle = AttributeContainer()
+                            normalStyle.font = .bitchatSystem(size: 14, design: .monospaced)
+                            normalStyle.foregroundColor = isDark ? Color.white : Color.black
+                            processedContent.append(AttributedString(beforeText).mergingAttributes(normalStyle))
+                        }
+                    }
+
+                    // Add the mention with highlight
+                    let mentionText = String(contentText[range])
+                    var mentionStyle = AttributeContainer()
+                    mentionStyle.font = .bitchatSystem(size: 14, weight: .semibold, design: .monospaced)
+                    mentionStyle.foregroundColor = Color.orange
+                    processedContent.append(AttributedString(mentionText).mergingAttributes(mentionStyle))
+
+                    if lastEndIndex < range.upperBound { lastEndIndex = range.upperBound }
+                }
+            }
+
+            // Add remaining text
+            if lastEndIndex < contentText.endIndex {
+                let remainingText = String(contentText[lastEndIndex...])
+                var normalStyle = AttributeContainer()
+                normalStyle.font = .bitchatSystem(size: 14, design: .monospaced)
+                normalStyle.foregroundColor = isDark ? Color.white : Color.black
+                processedContent.append(AttributedString(remainingText).mergingAttributes(normalStyle))
+            }
+
+            result.append(processedContent)
+
+            if message.isRelay, let originalSender = message.originalSender {
+                let relay = AttributedString(" (via \(originalSender))")
+                var relayStyle = AttributeContainer()
+                relayStyle.foregroundColor = primaryColor.opacity(0.7)
+                relayStyle.font = .bitchatSystem(size: 11, design: .monospaced)
+                result.append(relay.mergingAttributes(relayStyle))
+            }
+
+            // Add timestamp
+            let timestamp = AttributedString(" [\(message.formattedTimestamp)]")
+            var timestampStyle = AttributeContainer()
+            timestampStyle.foregroundColor = Color.gray.opacity(0.7)
+            timestampStyle.font = .bitchatSystem(size: 10, design: .monospaced)
+            result.append(timestamp.mergingAttributes(timestampStyle))
+        }
+
+        return result
+    }
+
+    // MARK: - Private Helpers
+
+    private func isSelfMessage(
+        _ message: BitchatMessage,
+        nickname: String,
+        myPeerID: String,
+        myNostrPubkey: String?,
+        activeChannel: ChannelID
+    ) -> Bool {
+        if let spid = message.senderPeerID?.id {
+            // In geohash channels, compare against our per-geohash nostr short ID
+            if case .location = activeChannel, spid.hasPrefix("nostr:"),
+               let myGeo = myNostrPubkey {
+                return spid == "nostr:\(myGeo.prefix(TransportConfig.nostrShortKeyDisplayLength))"
+            }
+            return spid == myPeerID
+        }
+        // Fallback by nickname
+        if message.sender == nickname { return true }
+        if message.sender.hasPrefix(nickname + "#") { return true }
+        return false
+    }
+
+    private func formatContent(
+        _ content: String,
+        nsContent: NSString,
+        nsLen: Int,
+        message: BitchatMessage,
+        baseColor: Color,
+        isSelf: Bool,
+        isDark: Bool,
+        nickname: String,
+        myPeerID: String,
+        myNostrPubkey: String?,
+        activeChannel: ChannelID
+    ) -> AttributedString {
+        // Extract all matches
+        let hasMentionsHint = content.contains("@")
+        let hasHashtagsHint = content.contains("#")
+        let hasURLHint = content.contains("://") || content.contains("www.") || content.contains("http")
+        let hasLightningHint = content.lowercased().contains("ln") || content.lowercased().contains("lightning:")
+        let hasCashuHint = content.lowercased().contains("cashu")
+
+        let hashtagMatches = hasHashtagsHint ? Regexes.hashtag.matches(in: content, options: [], range: NSRange(location: 0, length: nsLen)) : []
+        let mentionMatches = hasMentionsHint ? Regexes.mention.matches(in: content, options: [], range: NSRange(location: 0, length: nsLen)) : []
+        let urlMatches = hasURLHint ? (Regexes.linkDetector?.matches(in: content, options: [], range: NSRange(location: 0, length: nsLen)) ?? []) : []
+        let cashuMatches = hasCashuHint ? Regexes.cashu.matches(in: content, options: [], range: NSRange(location: 0, length: nsLen)) : []
+        let lightningMatches = hasLightningHint ? Regexes.lightningScheme.matches(in: content, options: [], range: NSRange(location: 0, length: nsLen)) : []
+        let bolt11Matches = hasLightningHint ? Regexes.bolt11.matches(in: content, options: [], range: NSRange(location: 0, length: nsLen)) : []
+        let lnurlMatches = hasLightningHint ? Regexes.lnurl.matches(in: content, options: [], range: NSRange(location: 0, length: nsLen)) : []
+
+        // Combine and sort matches, excluding hashtags/URLs overlapping mentions
+        let mentionRanges = mentionMatches.map { $0.range(at: 0) }
+
+        func overlapsMention(_ r: NSRange) -> Bool {
+            for mr in mentionRanges {
+                if NSIntersectionRange(r, mr).length > 0 { return true }
+            }
+            return false
+        }
+
+        func attachedToMention(_ r: NSRange) -> Bool {
+            if let nsRange = Range(r, in: content), nsRange.lowerBound > content.startIndex {
+                var i = content.index(before: nsRange.lowerBound)
+                while true {
+                    let ch = content[i]
+                    if ch.isWhitespace || ch.isNewline { break }
+                    if ch == "@" { return true }
+                    if i == content.startIndex { break }
+                    i = content.index(before: i)
+                }
+            }
+            return false
+        }
+
+        func isStandaloneHashtag(_ r: NSRange) -> Bool {
+            guard let nsRange = Range(r, in: content) else { return false }
+            if nsRange.lowerBound == content.startIndex { return true }
+            let prev = content.index(before: nsRange.lowerBound)
+            return content[prev].isWhitespace || content[prev].isNewline
+        }
+
+        var allMatches: [(range: NSRange, type: String)] = []
+        for match in hashtagMatches where !overlapsMention(match.range(at: 0)) && !attachedToMention(match.range(at: 0)) && isStandaloneHashtag(match.range(at: 0)) {
+            allMatches.append((match.range(at: 0), "hashtag"))
+        }
+        for match in mentionMatches {
+            allMatches.append((match.range(at: 0), "mention"))
+        }
+        for match in urlMatches where !overlapsMention(match.range) {
+            allMatches.append((match.range, "url"))
+        }
+        for match in cashuMatches where !overlapsMention(match.range(at: 0)) {
+            allMatches.append((match.range(at: 0), "cashu"))
+        }
+        for match in lightningMatches where !overlapsMention(match.range(at: 0)) {
+            allMatches.append((match.range(at: 0), "lightning"))
+        }
+
+        // Exclude overlaps with lightning/url for bolt11/lnurl
+        let occupied: [NSRange] = urlMatches.map { $0.range } + lightningMatches.map { $0.range(at: 0) }
+        func overlapsOccupied(_ r: NSRange) -> Bool {
+            for or in occupied {
+                if NSIntersectionRange(r, or).length > 0 { return true }
+            }
+            return false
+        }
+        for match in bolt11Matches where !overlapsMention(match.range(at: 0)) && !overlapsOccupied(match.range(at: 0)) {
+            allMatches.append((match.range(at: 0), "bolt11"))
+        }
+        for match in lnurlMatches where !overlapsMention(match.range(at: 0)) && !overlapsOccupied(match.range(at: 0)) {
+            allMatches.append((match.range(at: 0), "lnurl"))
+        }
+        allMatches.sort { $0.range.location < $1.range.location }
+
+        // Build content with styling
+        var processedContent = AttributedString()
+        var lastEnd = content.startIndex
+        let isMentioned = message.mentions?.contains(nickname) ?? false
+
+        for (range, type) in allMatches {
+            if let nsRange = Range(range, in: content) {
+                // Add text before match
+                if lastEnd < nsRange.lowerBound {
+                    let beforeText = String(content[lastEnd..<nsRange.lowerBound])
+                    if !beforeText.isEmpty {
+                        var beforeStyle = AttributeContainer()
+                        beforeStyle.foregroundColor = baseColor
+                        beforeStyle.font = isSelf
+                            ? .bitchatSystem(size: 14, weight: .bold, design: .monospaced)
+                            : .bitchatSystem(size: 14, design: .monospaced)
+                        if isMentioned {
+                            beforeStyle.font = beforeStyle.font?.bold()
+                        }
+                        processedContent.append(AttributedString(beforeText).mergingAttributes(beforeStyle))
+                    }
+                }
+
+                // Add styled match
+                let matchText = String(content[nsRange])
+                processedContent.append(formatMatch(
+                    matchText,
+                    type: type,
+                    baseColor: baseColor,
+                    isSelf: isSelf,
+                    isDark: isDark,
+                    nickname: nickname,
+                    myPeerID: myPeerID,
+                    myNostrPubkey: myNostrPubkey,
+                    activeChannel: activeChannel
+                ))
+
+                lastEnd = nsRange.upperBound
+            }
+        }
+
+        // Add remaining text after last match
+        if lastEnd < content.endIndex {
+            let remainingText = String(content[lastEnd...])
+            var remainingStyle = AttributeContainer()
+            remainingStyle.foregroundColor = baseColor
+            remainingStyle.font = isSelf
+                ? .bitchatSystem(size: 14, weight: .bold, design: .monospaced)
+                : .bitchatSystem(size: 14, design: .monospaced)
+            if isMentioned {
+                remainingStyle.font = remainingStyle.font?.bold()
+            }
+            processedContent.append(AttributedString(remainingText).mergingAttributes(remainingStyle))
+        }
+
+        return processedContent
+    }
+
+    private func formatMatch(
+        _ matchText: String,
+        type: String,
+        baseColor: Color,
+        isSelf: Bool,
+        isDark: Bool,
+        nickname: String,
+        myPeerID: String,
+        myNostrPubkey: String?,
+        activeChannel: ChannelID
+    ) -> AttributedString {
+        switch type {
+        case "mention":
+            return formatMention(
+                matchText,
+                baseColor: baseColor,
+                isSelf: isSelf,
+                nickname: nickname,
+                myPeerID: myPeerID,
+                myNostrPubkey: myNostrPubkey,
+                activeChannel: activeChannel
+            )
+        case "hashtag":
+            return formatHashtag(matchText, isDark: isDark, baseColor: baseColor, activeChannel: activeChannel)
+        case "url":
+            return formatURL(matchText, baseColor: baseColor, isSelf: isSelf)
+        case "cashu", "bolt11", "lnurl", "lightning":
+            return formatPayment(matchText, type: type, baseColor: baseColor, isSelf: isSelf)
+        default:
+            return AttributedString(matchText)
+        }
+    }
+
+    private func formatMention(
+        _ matchText: String,
+        baseColor: Color,
+        isSelf: Bool,
+        nickname: String,
+        myPeerID: String,
+        myNostrPubkey: String?,
+        activeChannel: ChannelID
+    ) -> AttributedString {
+        // Split optional '#abcd' suffix and color suffix light grey
+        let (mBase, mSuffix) = matchText.splitSuffix()
+
+        // Determine if this mention targets me
+        let mySuffix: String? = {
+            if case .location = activeChannel, let myGeo = myNostrPubkey {
+                return String(myGeo.suffix(4))
+            }
+            return String(myPeerID.prefix(4))
+        }()
+
+        let isMentionToMe: Bool = {
+            if mBase == nickname {
+                if let suf = mySuffix, !mSuffix.isEmpty {
+                    return mSuffix == "#\(suf)"
+                }
+                return mSuffix.isEmpty
+            }
+            return false
+        }()
+
+        var mentionStyle = AttributeContainer()
+        mentionStyle.font = .bitchatSystem(size: 14, weight: .semibold, design: .monospaced)
+        mentionStyle.foregroundColor = isMentionToMe ? .orange : baseColor
+
+        var result = AttributedString()
+        result.append(AttributedString(mBase).mergingAttributes(mentionStyle))
+
+        if !mSuffix.isEmpty {
+            var suffixStyle = mentionStyle
+            suffixStyle.foregroundColor = (isMentionToMe ? Color.orange : baseColor).opacity(0.5)
+            result.append(AttributedString(mSuffix).mergingAttributes(suffixStyle))
+        }
+
+        return result
+    }
+
+    private func formatHashtag(
+        _ matchText: String,
+        isDark: Bool,
+        baseColor: Color,
+        activeChannel: ChannelID
+    ) -> AttributedString {
+        var hashtagStyle = AttributeContainer()
+        hashtagStyle.font = .bitchatSystem(size: 14, weight: .medium, design: .monospaced)
+
+        // Determine if this hashtag represents the active channel
+        let isActiveChannel: Bool = {
+            if matchText.count > 1 {
+                let tag = String(matchText.dropFirst()) // Remove '#'
+                switch activeChannel {
+                case .mesh:
+                    return tag.lowercased() == "mesh"
+                case .location(let ch):
+                    return tag.lowercased() == ch.geohash.lowercased()
+                }
+            }
+            return false
+        }()
+
+        if isActiveChannel {
+            // Highlight active channel hashtag in green
+            hashtagStyle.foregroundColor = isDark ? Color.green : Color(red: 0, green: 0.5, blue: 0)
+            hashtagStyle.font = .bitchatSystem(size: 14, weight: .bold, design: .monospaced)
+        } else {
+            // Link to geohash if valid
+            if matchText.count > 1 {
+                let tag = String(matchText.dropFirst())
+                if tag.count >= 2, tag.count <= 12,
+                   tag.allSatisfy({ "0123456789bcdefghjkmnpqrstuvwxyz".contains($0) }) {
+                    if let url = URL(string: "bitchat://geohash/\(tag)") {
+                        hashtagStyle.link = url
+                    }
+                }
+            }
+            hashtagStyle.foregroundColor = baseColor.opacity(0.8)
+        }
+
+        return AttributedString(matchText).mergingAttributes(hashtagStyle)
+    }
+
+    private func formatURL(_ matchText: String, baseColor: Color, isSelf: Bool) -> AttributedString {
+        var urlStyle = AttributeContainer()
+        if let url = URL(string: matchText) {
+            urlStyle.link = url
+        }
+        urlStyle.foregroundColor = baseColor
+        urlStyle.font = isSelf
+            ? .bitchatSystem(size: 14, weight: .bold, design: .monospaced)
+            : .bitchatSystem(size: 14, design: .monospaced)
+        urlStyle.underlineStyle = .single
+        return AttributedString(matchText).mergingAttributes(urlStyle)
+    }
+
+    private func formatPayment(
+        _ matchText: String,
+        type: String,
+        baseColor: Color,
+        isSelf: Bool
+    ) -> AttributedString {
+        var paymentStyle = AttributeContainer()
+        paymentStyle.foregroundColor = baseColor
+        paymentStyle.font = isSelf
+            ? .bitchatSystem(size: 14, weight: .bold, design: .monospaced)
+            : .bitchatSystem(size: 14, design: .monospaced)
+
+        // Make payment tokens tappable
+        if type == "cashu", let url = URL(string: "cashu:\(matchText)") {
+            paymentStyle.link = url
+        } else if type == "lightning" || type == "bolt11" || type == "lnurl" {
+            if let url = URL(string: matchText.lowercased().hasPrefix("lightning:") ? matchText : "lightning:\(matchText)") {
+                paymentStyle.link = url
+            }
+        }
+
+        return AttributedString(matchText).mergingAttributes(paymentStyle)
+    }
+}

bitchat/Services/NetworkActivationService.swift

@@ -20,6 +20,12 @@ final class NetworkActivationService: ObservableObject {
 
     private init() {}
 
+    deinit {
+        // Clean up Combine subscriptions
+        cancellables.removeAll()
+        SecureLogger.debug("NetworkActivationService deinitialized", category: .session)
+    }
+
     func start() {
         guard !started else { return }
         started = true

bitchat/Services/NostrTransport.swift

@@ -16,11 +16,9 @@ final class NostrTransport: Transport {
     private var isSendingReadAcks = false
     private let readAckInterval: TimeInterval = TransportConfig.nostrReadAckInterval
     private let keychain: KeychainManagerProtocol
-    private let idBridge: NostrIdentityBridge
 
-    init(keychain: KeychainManagerProtocol, idBridge: NostrIdentityBridge) {
+    init(keychain: KeychainManagerProtocol) {
         self.keychain = keychain
-        self.idBridge = idBridge
     }
 
     // MARK: - Transport Protocol Conformance
@@ -67,7 +65,7 @@ final class NostrTransport: Transport {
     func sendPrivateMessage(_ content: String, to peerID: PeerID, recipientNickname: String, messageID: String) {
         Task { @MainActor in
             guard let recipientNpub = resolveRecipientNpub(for: peerID) else { return }
-            guard let senderIdentity = try? idBridge.getCurrentNostrIdentity() else { return }
+            guard let senderIdentity = try? NostrIdentityBridge.getCurrentNostrIdentity() else { return }
             SecureLogger.debug("NostrTransport: preparing PM to \(recipientNpub.prefix(16))… for peerID \(peerID.id.prefix(8))… id=\(messageID.prefix(8))…", category: .session)
             // Convert recipient npub -> hex (x-only)
             let recipientHex: String
@@ -104,7 +102,7 @@ final class NostrTransport: Transport {
     func sendFavoriteNotification(to peerID: PeerID, isFavorite: Bool) {
         Task { @MainActor in
             guard let recipientNpub = resolveRecipientNpub(for: peerID) else { return }
-            guard let senderIdentity = try? idBridge.getCurrentNostrIdentity() else { return }
+            guard let senderIdentity = try? NostrIdentityBridge.getCurrentNostrIdentity() else { return }
             let content = isFavorite ? "[FAVORITED]:\(senderIdentity.npub)" : "[UNFAVORITED]:\(senderIdentity.npub)"
             SecureLogger.debug("NostrTransport: preparing FAVORITE(\(isFavorite)) to \(recipientNpub.prefix(16))…", category: .session)
             // Convert recipient npub -> hex
@@ -131,7 +129,7 @@ final class NostrTransport: Transport {
     func sendDeliveryAck(for messageID: String, to peerID: PeerID) {
         Task { @MainActor in
             guard let recipientNpub = resolveRecipientNpub(for: peerID) else { return }
-            guard let senderIdentity = try? idBridge.getCurrentNostrIdentity() else { return }
+            guard let senderIdentity = try? NostrIdentityBridge.getCurrentNostrIdentity() else { return }
             SecureLogger.debug("NostrTransport: preparing DELIVERED ack for id=\(messageID.prefix(8))… to \(recipientNpub.prefix(16))…", category: .session)
             let recipientHex: String
             do {
@@ -214,7 +212,7 @@ extension NostrTransport {
         let item = readQueue.removeFirst()
         Task { @MainActor in
             guard let recipientNpub = resolveRecipientNpub(for: item.peerID) else { scheduleNextReadAck(); return }
-            guard let senderIdentity = try? idBridge.getCurrentNostrIdentity() else { scheduleNextReadAck(); return }
+            guard let senderIdentity = try? NostrIdentityBridge.getCurrentNostrIdentity() else { scheduleNextReadAck(); return }
             SecureLogger.debug("NostrTransport: preparing READ ack for id=\(item.receipt.originalMessageID.prefix(8))… to \(recipientNpub.prefix(16))…", category: .session)
             // Convert recipient npub -> hex
             let recipientHex: String

bitchat/Services/NotificationStreamAssembler.swift

@@ -6,19 +6,10 @@
 // For more information, see <https://unlicense.org>
 //
 
-import BitLogger
 import Foundation
 
 struct NotificationStreamAssembler {
     private var buffer = Data()
-    private var pendingFrameStartedAt: DispatchTime?
-    private var pendingFrameExpectedLength: Int = 0
-
-    private mutating func resetState() {
-        buffer.removeAll(keepingCapacity: false)
-        pendingFrameStartedAt = nil
-        pendingFrameExpectedLength = 0
-    }
 
     mutating func append(_ chunk: Data) -> (frames: [Data], droppedPrefixes: [UInt8], reset: Bool) {
         guard !chunk.isEmpty else { return ([], [], false) }
@@ -27,107 +18,64 @@ struct NotificationStreamAssembler {
 
         var frames: [Data] = []
         var dropped: [UInt8] = []
-        var didReset = false
+        var reset = false
-        let now = DispatchTime.now()
+        let maxFrameLength = TransportConfig.blePendingWriteBufferCapBytes
-        let maxFrameLength = TransportConfig.bleNotificationAssemblerHardCapBytes
-        let minimumFramePrefix = BinaryProtocol.v1HeaderSize + BinaryProtocol.senderIDSize
 
-        if buffer.count > TransportConfig.bleNotificationAssemblerHardCapBytes {
+        let minHeaderBytes = 14 // version + type + ttl + timestamp(8) + flags + length(2)
-            SecureLogger.error("❌ Notification assembler overflow (\(buffer.count) bytes); dropping partial frame", category: .session)
+        let minFramePrefix = minHeaderBytes + BinaryProtocol.senderIDSize
-            resetState()
-            return ([], [], true)
-        }
 
-        while buffer.count >= minimumFramePrefix {
+        while buffer.count >= minFramePrefix {
-            guard let version = buffer.first else { break }
+            guard let first = buffer.first else { break }
-            guard version == 1 || version == 2 else {
+            if first != 1 {
                 dropped.append(buffer.removeFirst())
-                pendingFrameStartedAt = nil
-                pendingFrameExpectedLength = 0
                 continue
             }
 
-            guard let headerSize = BinaryProtocol.headerSize(for: version) else {
+            guard buffer.count >= minHeaderBytes else { break }
-                dropped.append(buffer.removeFirst())
-                pendingFrameStartedAt = nil
-                pendingFrameExpectedLength = 0
-                continue
-            }
-            let framePrefix = headerSize + BinaryProtocol.senderIDSize
-            guard buffer.count >= framePrefix else { break }
 
-            let flagsIndex = buffer.startIndex + BinaryProtocol.Offsets.flags
+            let headerBytes = Array(buffer.prefix(minFramePrefix))
-            guard flagsIndex < buffer.endIndex else { break }
+            guard headerBytes.count == minFramePrefix else { break }
-            let flags = buffer[flagsIndex]
+
+            let flags = headerBytes[11]
             let hasRecipient = (flags & BinaryProtocol.Flags.hasRecipient) != 0
             let hasSignature = (flags & BinaryProtocol.Flags.hasSignature) != 0
-            let isCompressed = (flags & BinaryProtocol.Flags.isCompressed) != 0
+            let payloadLen = (Int(headerBytes[12]) << 8) | Int(headerBytes[13])
 
-            let lengthOffset = 12
+            var frameLength = minFramePrefix + payloadLen
-            let payloadLength: Int
-            if version == 2 {
-                let lengthIndex = buffer.startIndex + lengthOffset
-                payloadLength =
-                    (Int(buffer[lengthIndex]) << 24) |
-                    (Int(buffer[lengthIndex + 1]) << 16) |
-                    (Int(buffer[lengthIndex + 2]) << 8) |
-                    Int(buffer[lengthIndex + 3])
-            } else {
-                let lengthIndex = buffer.startIndex + lengthOffset
-                payloadLength = (Int(buffer[lengthIndex]) << 8) | Int(buffer[lengthIndex + 1])
-            }
-
-            var frameLength = framePrefix + payloadLength
             if hasRecipient { frameLength += BinaryProtocol.recipientIDSize }
             if hasSignature { frameLength += BinaryProtocol.signatureSize }
-            if isCompressed {
-                let rawLengthFieldBytes = (version == 2) ? 4 : 2
-                if payloadLength < rawLengthFieldBytes {
-                    SecureLogger.error("❌ Invalid compressed payload length (\(payloadLength))", category: .session)
-                    resetState()
-                    didReset = true
-                    break
-                }
-            }
 
             guard frameLength > 0, frameLength <= maxFrameLength else {
-                SecureLogger.error("❌ Notification frame length \(frameLength) invalid (cap=\(maxFrameLength)); resetting stream", category: .session)
+                buffer.removeAll()
-                resetState()
+                reset = true
-                didReset = true
                 break
             }
 
             if buffer.count < frameLength {
-                let remaining = frameLength - buffer.count
+                // Check if a new frame start exists within the incomplete buffer; if so, drop leading partial bytes.
-                if pendingFrameStartedAt == nil || frameLength != pendingFrameExpectedLength {
+                if let nextStart = buffer.dropFirst().firstIndex(of: 1) {
-                    pendingFrameStartedAt = now
+                    let dropCount = buffer.distance(from: buffer.startIndex, to: nextStart)
-                    pendingFrameExpectedLength = frameLength
+                    if dropCount > 0 {
-                } else if let started = pendingFrameStartedAt {
+                        buffer.removeFirst(dropCount)
-                    let elapsed = now.uptimeNanoseconds - started.uptimeNanoseconds
+                        dropped.append(1) // treat as dropped partial start
-                    let threshold = UInt64(TransportConfig.bleAssemblerStallResetMs) * 1_000_000
-                    if elapsed >= threshold {
-                        SecureLogger.debug("📉 Resetting notification assembler after waiting \(remaining)B for \(TransportConfig.bleAssemblerStallResetMs)ms", category: .session)
-                        resetState()
-                        didReset = true
-                    } else {
-                        SecureLogger.debug("⌛ Waiting for remaining \(remaining)B to complete BLE frame", category: .session)
                     }
                 }
                 break
             }
 
-            pendingFrameStartedAt = nil
-            pendingFrameExpectedLength = 0
-
             let frame = Data(buffer.prefix(frameLength))
             frames.append(frame)
             buffer.removeFirst(frameLength)
         }
 
         if !buffer.isEmpty, buffer.allSatisfy({ $0 == 0 }) {
-            resetState()
+            buffer.removeAll(keepingCapacity: false)
         }
 
-        return (frames, dropped, didReset)
+        return (frames, dropped, reset)
+    }
+
+    mutating func reset() {
+        buffer.removeAll(keepingCapacity: false)
     }
 }

bitchat/Services/PrivateChatManager.swift

@@ -12,9 +12,9 @@ import SwiftUI
 
 /// Manages all private chat functionality
 final class PrivateChatManager: ObservableObject {
-    @Published var privateChats: [PeerID: [BitchatMessage]] = [:]
+    @Published var privateChats: [String: [BitchatMessage]] = [:]
-    @Published var selectedPeer: PeerID? = nil
+    @Published var selectedPeer: String? = nil
-    @Published var unreadMessages: Set<PeerID> = []
+    @Published var unreadMessages: Set<String> = []
     
     private var selectedPeerFingerprint: String? = nil
     var sentReadReceipts: Set<String> = []  // Made accessible for ChatViewModel
@@ -27,15 +27,19 @@ final class PrivateChatManager: ObservableObject {
         self.meshService = meshService
     }
 
+    deinit {
+        SecureLogger.debug("PrivateChatManager deinitialized", category: .session)
+    }
+
     // Cap for messages stored per private chat
     private let privateChatCap = TransportConfig.privateChatCap
     
     /// Start a private chat with a peer
-    func startChat(with peerID: PeerID) {
+    func startChat(with peerID: String) {
         selectedPeer = peerID
         
         // Store fingerprint for persistence across reconnections
-        if let fingerprint = meshService?.getFingerprint(for: peerID) {
+        if let fingerprint = meshService?.getFingerprint(for: PeerID(str: peerID)) {
             selectedPeerFingerprint = fingerprint
         }
         
@@ -55,7 +59,7 @@ final class PrivateChatManager: ObservableObject {
     }
 
     /// Remove duplicate messages by ID and keep chronological order
-    func sanitizeChat(for peerID: PeerID) {
+    func sanitizeChat(for peerID: String) {
         guard let arr = privateChats[peerID] else { return }
         if arr.count <= 1 {
             return
@@ -79,7 +83,7 @@ final class PrivateChatManager: ObservableObject {
     }
     
     /// Mark messages from a peer as read
-    func markAsRead(from peerID: PeerID) {
+    func markAsRead(from peerID: String) {
         unreadMessages.remove(peerID)
         
         // Send read receipts for unread messages that haven't been sent yet

bitchat/Services/TransferProgressManager.swift

@@ -1,65 +0,0 @@
-import Foundation
-import Combine
-
-/// Centralized progress bus for Bluetooth file transfers.
-/// Emits Combine events consumed by ChatViewModel to update UI progress indicators.
-final class TransferProgressManager {
-    static let shared = TransferProgressManager()
-
-    enum Event {
-        case started(id: String, totalFragments: Int)
-        case updated(id: String, sentFragments: Int, totalFragments: Int)
-        case completed(id: String, totalFragments: Int)
-        case cancelled(id: String, sentFragments: Int, totalFragments: Int)
-    }
-
-    private let subject = PassthroughSubject<Event, Never>()
-    private let queue = DispatchQueue(label: "com.bitchat.transfer-progress", attributes: .concurrent)
-    private var states: [String: (sent: Int, total: Int)] = [:]
-
-    var publisher: AnyPublisher<Event, Never> {
-        subject.eraseToAnyPublisher()
-    }
-
-    func start(id: String, totalFragments: Int) {
-        queue.async(flags: .barrier) { [weak self] in
-            guard let self = self else { return }
-            self.states[id] = (sent: 0, total: totalFragments)
-            self.subject.send(.started(id: id, totalFragments: totalFragments))
-        }
-    }
-
-    func recordFragmentSent(id: String) {
-        queue.async(flags: .barrier) { [weak self] in
-            guard let self = self, var state = self.states[id] else { return }
-            state.sent = min(state.sent + 1, state.total)
-            self.states[id] = state
-            self.subject.send(.updated(id: id, sentFragments: state.sent, totalFragments: state.total))
-            if state.sent >= state.total {
-                self.states.removeValue(forKey: id)
-                self.subject.send(.completed(id: id, totalFragments: state.total))
-            }
-        }
-    }
-
-    func cancel(id: String) {
-        queue.async(flags: .barrier) { [weak self] in
-            guard let self = self, let state = self.states.removeValue(forKey: id) else { return }
-            self.subject.send(.cancelled(id: id, sentFragments: state.sent, totalFragments: state.total))
-        }
-    }
-
-    func reset(id: String) {
-        queue.async(flags: .barrier) { [weak self] in
-            self?.states.removeValue(forKey: id)
-        }
-    }
-
-    func snapshot(id: String) -> (sent: Int, total: Int)? {
-        var result: (sent: Int, total: Int)?
-        queue.sync {
-            result = states[id]
-        }
-        return result
-    }
-}

bitchat/Services/Transport.swift

@@ -50,9 +50,6 @@ protocol Transport: AnyObject {
     func sendFavoriteNotification(to peerID: PeerID, isFavorite: Bool)
     func sendBroadcastAnnounce()
     func sendDeliveryAck(for messageID: String, to peerID: PeerID)
-    func sendFileBroadcast(_ packet: BitchatFilePacket, transferId: String)
-    func sendFilePrivate(_ packet: BitchatFilePacket, to peerID: PeerID, transferId: String)
-    func cancelTransfer(_ transferId: String)
 
     // QR verification (optional for transports)
     func sendVerifyChallenge(to peerID: PeerID, noiseKeyHex: String, nonceA: Data)
@@ -62,9 +59,6 @@ protocol Transport: AnyObject {
 extension Transport {
     func sendVerifyChallenge(to peerID: PeerID, noiseKeyHex: String, nonceA: Data) {}
     func sendVerifyResponse(to peerID: PeerID, noiseKeyHex: String, nonceA: Data) {}
-    func sendFileBroadcast(_ packet: BitchatFilePacket, transferId: String) {}
-    func sendFilePrivate(_ packet: BitchatFilePacket, to peerID: PeerID, transferId: String) {}
-    func cancelTransfer(_ transferId: String) {}
 }
 
 protocol TransportPeerEventsDelegate: AnyObject {

bitchat/Services/TransportConfig.swift

@@ -30,11 +30,7 @@ enum TransportConfig {
     static let bleDynamicRSSIThresholdDefault: Int = -90
     static let bleConnectionCandidatesMax: Int = 100
     static let blePendingWriteBufferCapBytes: Int = 1_000_000
-    static let bleNotificationAssemblerHardCapBytes: Int = 8 * 1024 * 1024
+    static let blePendingNotificationsCapCount: Int = 20
-    static let bleAssemblerStallResetMs: Int = 250
-    static let blePendingNotificationsCapCount: Int = 128
-    static let bleNotificationRetryDelayMs: Int = 25
-    static let bleNotificationRetryMaxAttempts: Int = 80
 
     // Nostr
     static let nostrReadAckInterval: TimeInterval = 0.35 // ~3 per second
@@ -45,12 +41,6 @@ enum TransportConfig {
     static let uiLateInsertThresholdGeo: TimeInterval = 0.0
     static let uiProcessedNostrEventsCap: Int = 2000
     static let uiChannelInactivityThresholdSeconds: TimeInterval = 9 * 60
-    
-    // UI rate limiters (token buckets)
-    static let uiSenderRateBucketCapacity: Double = 5
-    static let uiSenderRateBucketRefillPerSec: Double = 1.0
-    static let uiContentRateBucketCapacity: Double = 3
-    static let uiContentRateBucketRefillPerSec: Double = 0.5
 
     // UI sleeps/delays
     static let uiStartupInitialDelaySeconds: TimeInterval = 1.0

bitchat/Services/UnifiedPeerService.swift

@@ -27,7 +27,6 @@ final class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
     private var peerIndex: [PeerID: BitchatPeer] = [:]
     private var fingerprintCache: [PeerID: String] = [:]
     private let meshService: Transport
-    private let idBridge: NostrIdentityBridge
     private let identityManager: SecureIdentityStateManagerProtocol
     weak var messageRouter: MessageRouter?
     private let favoritesService = FavoritesPersistenceService.shared
@@ -35,13 +34,8 @@ final class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
     
     // MARK: - Initialization
     
-    init(
+    init(meshService: Transport, identityManager: SecureIdentityStateManagerProtocol) {
-        meshService: Transport,
-        idBridge: NostrIdentityBridge,
-        identityManager: SecureIdentityStateManagerProtocol
-    ) {
         self.meshService = meshService
-        self.idBridge = idBridge
         self.identityManager = identityManager
         
         // Subscribe to changes from both services
@@ -52,7 +46,17 @@ final class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
             updatePeers()
         }
     }
-    
+
+    deinit {
+        // Clean up NotificationCenter observers
+        NotificationCenter.default.removeObserver(self)
+
+        // Clean up Combine subscriptions
+        cancellables.removeAll()
+
+        SecureLogger.debug("UnifiedPeerService deinitialized", category: .session)
+    }
+
     // MARK: - Setup
     
     private func setupSubscriptions() {
@@ -235,10 +239,10 @@ final class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
     }
     
     /// Get peer ID for nickname
-    func getPeerID(for nickname: String) -> PeerID? {
+    func getPeerID(for nickname: String) -> String? {
         for peer in peers {
             if peer.displayName == nickname || peer.nickname == nickname {
-                return peer.peerID
+                return peer.peerID.id
             }
         }
         return nil
@@ -291,7 +295,7 @@ final class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
             var peerNostrKey = peer.nostrPublicKey
             if peerNostrKey == nil {
                 // Try to get from NostrIdentityBridge association
-                peerNostrKey = idBridge.getNostrPublicKey(for: peer.noisePublicKey)
+                peerNostrKey = NostrIdentityBridge.getNostrPublicKey(for: peer.noisePublicKey)
             }
             
             // Add favorite
@@ -347,7 +351,7 @@ final class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
     // MARK: - Compatibility Methods (for easy migration)
     
     var allPeers: [BitchatPeer] { peers }
-    var connectedPeers: Set<PeerID> { connectedPeerIDs }
+    var connectedPeers: [PeerID] { Array(connectedPeerIDs) }
     var favoritePeers: Set<String> {
         Set(favorites.compactMap { getFingerprint(for: $0.peerID) })
     }

bitchat/Sync/GossipSyncManager.swift

@@ -13,9 +13,6 @@ final class GossipSyncManager {
         var gcsMaxBytes: Int = 400           // filter size budget (128..1024)
         var gcsTargetFpr: Double = 0.01      // 1%
         var maxMessageAgeSeconds: TimeInterval = 900  // 15 min - discard older messages
-        var maintenanceIntervalSeconds: TimeInterval = 30.0
-        var stalePeerCleanupIntervalSeconds: TimeInterval = 60.0
-        var stalePeerTimeoutSeconds: TimeInterval = 60.0
     }
 
     private let myPeerID: PeerID
@@ -30,7 +27,6 @@ final class GossipSyncManager {
     // Timer
     private var periodicTimer: DispatchSourceTimer?
     private let queue = DispatchQueue(label: "mesh.sync", qos: .utility)
-    private var lastStalePeerCleanup: Date = .distantPast
 
     init(myPeerID: PeerID, config: Config = Config()) {
         self.myPeerID = myPeerID
@@ -40,10 +36,10 @@ final class GossipSyncManager {
     func start() {
         stop()
         let timer = DispatchSource.makeTimerSource(queue: queue)
-        let interval = max(0.1, config.maintenanceIntervalSeconds)
+        timer.schedule(deadline: .now() + 30.0, repeating: 30.0, leeway: .seconds(1))
-        timer.schedule(deadline: .now() + interval, repeating: interval, leeway: .seconds(1))
         timer.setEventHandler { [weak self] in
-            self?.performPeriodicMaintenance()
+            self?.cleanupExpiredMessages()
+            self?.sendRequestSync()
         }
         timer.resume()
         periodicTimer = timer
@@ -77,15 +73,6 @@ final class GossipSyncManager {
         return packet.timestamp >= cutoffMs
     }
 
-    private func isAnnouncementFresh(_ packet: BitchatPacket) -> Bool {
-        guard config.stalePeerTimeoutSeconds > 0 else { return true }
-        let nowMs = UInt64(Date().timeIntervalSince1970 * 1000)
-        let timeoutMs = UInt64(config.stalePeerTimeoutSeconds * 1000)
-        guard nowMs >= timeoutMs else { return true }
-        let cutoffMs = nowMs - timeoutMs
-        return packet.timestamp >= cutoffMs
-    }
-
     private func _onPublicPacketSeen(_ packet: BitchatPacket) {
         let mt = MessageType(rawValue: packet.type)
         let isBroadcastRecipient: Bool = {
@@ -99,14 +86,6 @@ final class GossipSyncManager {
         // Reject expired packets to prevent ghost peers and old messages
         guard isPacketFresh(packet) else { return }
 
-        if isAnnounce {
-            guard isAnnouncementFresh(packet) else {
-                let sender = packet.senderID.hexEncodedString().lowercased()
-                removeState(forNormalizedPeerID: sender)
-                return
-            }
-        }
-
         let idHex = PacketIdUtil.computeId(packet).hexEncodedString()
 
         if isBroadcastMessage {
@@ -121,7 +100,7 @@ final class GossipSyncManager {
                 }
             }
         } else if isAnnounce {
-            let sender = packet.senderID.hexEncodedString().lowercased()
+            let sender = packet.senderID.hexEncodedString()
             latestAnnouncementByPeer[sender] = (id: idHex, packet: packet)
         }
     }
@@ -251,34 +230,6 @@ final class GossipSyncManager {
         }
     }
 
-    private func performPeriodicMaintenance(now: Date = Date()) {
-        cleanupExpiredMessages()
-        cleanupStaleAnnouncementsIfNeeded(now: now)
-        sendRequestSync()
-    }
-
-    private func cleanupStaleAnnouncementsIfNeeded(now: Date) {
-        guard now.timeIntervalSince(lastStalePeerCleanup) >= config.stalePeerCleanupIntervalSeconds else {
-            return
-        }
-        lastStalePeerCleanup = now
-        cleanupStaleAnnouncements(now: now)
-    }
-
-    private func cleanupStaleAnnouncements(now: Date) {
-        let timeoutMs = UInt64(config.stalePeerTimeoutSeconds * 1000)
-        let nowMs = UInt64(now.timeIntervalSince1970 * 1000)
-        guard nowMs >= timeoutMs else { return }
-        let cutoff = nowMs - timeoutMs
-        let stalePeerIDs = latestAnnouncementByPeer.compactMap { (peerHex, pair) -> String? in
-            pair.packet.timestamp < cutoff ? peerHex.lowercased() : nil
-        }
-        guard !stalePeerIDs.isEmpty else { return }
-        for peerKey in stalePeerIDs {
-            removeState(forNormalizedPeerID: peerKey)
-        }
-    }
-
     // Explicit removal hook for LEAVE/stale peer
     func removeAnnouncementForPeer(_ peerID: PeerID) {
         queue.async { [weak self] in
@@ -288,11 +239,8 @@ final class GossipSyncManager {
 
     private func _removeAnnouncementForPeer(_ peerID: PeerID) {
         let normalizedPeerID = peerID.id.lowercased()
-        removeState(forNormalizedPeerID: normalizedPeerID)
-    }
-
-    private func removeState(forNormalizedPeerID normalizedPeerID: String) {
         _ = latestAnnouncementByPeer.removeValue(forKey: normalizedPeerID)
+
         // Remove messages from this peer
         // Collect IDs to remove first to avoid concurrent modification
         let messageIdsToRemove = messages.compactMap { (id, message) -> String? in
@@ -306,25 +254,3 @@ final class GossipSyncManager {
         }
     }
 }
-
-#if DEBUG
-extension GossipSyncManager {
-    func _performMaintenanceSynchronously(now: Date = Date()) {
-        queue.sync {
-            performPeriodicMaintenance(now: now)
-        }
-    }
-
-    func _hasAnnouncement(for peerID: PeerID) -> Bool {
-        queue.sync {
-            latestAnnouncementByPeer[peerID.id.lowercased()] != nil
-        }
-    }
-
-    func _messageCount(for peerID: PeerID) -> Int {
-        queue.sync {
-            messages.values.filter { $0.senderID.hexEncodedString().lowercased() == peerID.id.lowercased() }.count
-        }
-    }
-}
-#endif

bitchat/Utils/FileTransferLimits.swift

@@ -1,25 +0,0 @@
-import Foundation
-
-/// Centralized thresholds for Bluetooth file transfers to keep payload sizes sane on constrained radios.
-enum FileTransferLimits {
-    /// Absolute ceiling enforced for any file payload (voice, image, other).
-    static let maxPayloadBytes: Int = 1 * 1024 * 1024 // 1 MiB
-    /// Voice notes stay small for low-latency relays.
-    static let maxVoiceNoteBytes: Int = 1 * 1024 * 1024 // 1 MiB
-    /// Compressed images after downscaling should comfortably fit under this budget.
-    static let maxImageBytes: Int = 1 * 1024 * 1024 // 1 MiB
-    /// Worst-case size once TLV metadata and binary packet framing are included for the largest payloads.
-    static let maxFramedFileBytes: Int = {
-        let maxMetadataBytes = Int(UInt16.max) * 2 // fileName + mimeType TLVs
-        let tlvEnvelopeOverhead = 18 + maxMetadataBytes // TLV tags + lengths + metadata bytes
-        let binaryEnvelopeOverhead = BinaryProtocol.v2HeaderSize
-            + BinaryProtocol.senderIDSize
-            + BinaryProtocol.recipientIDSize
-            + BinaryProtocol.signatureSize
-        return maxPayloadBytes + tlvEnvelopeOverhead + binaryEnvelopeOverhead
-    }()
-
-    static func isValidPayload(_ size: Int) -> Bool {
-        size <= maxPayloadBytes
-    }
-}

bitchat/Views/Components/TextMessageView.swift

@@ -91,7 +91,6 @@ struct TextMessageView: View {
     .environmentObject(
         ChatViewModel(
             keychain: keychain,
-            idBridge: NostrIdentityBridge(),
             identityManager: SecureIdentityStateManager(keychain)
         )
     )

bitchat/Views/FingerprintView.swift

@@ -66,12 +66,12 @@ struct FingerprintView: View {
             VStack(alignment: .leading, spacing: 16) {
                 // Prefer short mesh ID for session/encryption status
                 let statusPeerID: String = {
-                    if peerID.count == 64, let short = viewModel.getShortIDForNoiseKey(peerID) { return short.id }
+                    if peerID.count == 64, let short = viewModel.getShortIDForNoiseKey(peerID) { return short }
                     return peerID
                 }()
                 // Resolve a friendly name
                 let peerNickname: String = {
-                    if let p = viewModel.getPeer(byID: PeerID(str: statusPeerID)) { return p.displayName }
+                    if let p = viewModel.getPeer(byID: statusPeerID) { return p.displayName }
                     if let name = viewModel.meshService.peerNickname(peerID: PeerID(str: statusPeerID)) { return name }
                     if peerID.count == 64, let data = Data(hexString: peerID) {
                         if let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: data), !fav.peerNickname.isEmpty { return fav.peerNickname }
@@ -84,7 +84,7 @@ struct FingerprintView: View {
                     return Strings.unknownPeer()
                 }()
                 // Accurate encryption state based on short ID session
-                let encryptionStatus = viewModel.getEncryptionStatus(for: PeerID(str: statusPeerID))
+                let encryptionStatus = viewModel.getEncryptionStatus(for: statusPeerID)
                 
                 HStack {
                     if let icon = encryptionStatus.icon {
@@ -115,7 +115,7 @@ struct FingerprintView: View {
                         .font(.bitchatSystem(size: 12, weight: .bold, design: .monospaced))
                         .foregroundColor(textColor.opacity(0.7))
                     
-                    if let fingerprint = viewModel.getFingerprint(for: PeerID(str: statusPeerID)) {
+                    if let fingerprint = viewModel.getFingerprint(for: statusPeerID) {
                         Text(formatFingerprint(fingerprint))
                             .font(.bitchatSystem(size: 14, design: .monospaced))
                             .foregroundColor(textColor)
@@ -176,7 +176,6 @@ struct FingerprintView: View {
                 // Verification status
                 if encryptionStatus == .noiseSecured || encryptionStatus == .noiseVerified {
                     let isVerified = encryptionStatus == .noiseVerified
-                    let peerID = PeerID(str: peerID)
                     
                     VStack(spacing: 12) {
                         Text(isVerified ? Strings.verifiedBadge : Strings.notVerifiedBadge)

bitchat/Views/GeohashPeopleList.swift

@@ -28,7 +28,7 @@ struct GeohashPeopleList: View {
         } else {
             let myHex: String? = {
                 if case .location(let ch) = LocationChannelManager.shared.selectedChannel,
-                   let id = try? viewModel.idBridge.deriveIdentity(forGeohash: ch.geohash) {
+                   let id = try? NostrIdentityBridge.deriveIdentity(forGeohash: ch.geohash) {
                     return id.publicKeyHex.lowercased()
                 }
                 return nil

bitchat/Views/LocationChannelsSheet.swift

@@ -599,7 +599,7 @@ extension LocationChannelsSheet {
         switch level {
         case .region:
             return ""
-        case .building, .block, .neighborhood, .city, .province:
+        default:
             return "~"
         }
     }

bitchat/Views/LocationNotesView.swift

@@ -141,7 +141,7 @@ struct LocationNotesView: View {
         String(
             format: String(localized: "location_notes.header", comment: "Header displaying the geohash and localized note count"),
             locale: .current,
-            "\(geohash) ± 1", count
+            geohash, count
         )
     }
 

bitchat/Views/Media/BlockRevealImageView.swift

@@ -1,191 +0,0 @@
-import SwiftUI
-
-#if os(iOS)
-import UIKit
-private typealias PlatformImage = UIImage
-#else
-import AppKit
-private typealias PlatformImage = NSImage
-#endif
-
-struct BlockRevealImageView: View {
-    private let url: URL
-    private let revealProgress: Double?
-    private let isSending: Bool
-    private let onCancel: (() -> Void)?
-    private let initiallyBlurred: Bool
-    private let onOpen: (() -> Void)?
-    private let onDelete: (() -> Void)?
-
-    @State private var platformImage: PlatformImage?
-    @State private var aspectRatio: CGFloat = 1
-    @State private var isBlurred: Bool = false
-
-    init(
-        url: URL,
-        revealProgress: Double?,
-        isSending: Bool,
-        onCancel: (() -> Void)?,
-        initiallyBlurred: Bool = false,
-        onOpen: (() -> Void)? = nil,
-        onDelete: (() -> Void)? = nil
-    ) {
-        self.url = url
-        self.revealProgress = revealProgress
-        self.isSending = isSending
-        self.onCancel = onCancel
-        self.initiallyBlurred = initiallyBlurred
-        self.onOpen = onOpen
-        self.onDelete = onDelete
-    }
-
-    private var fraction: Double {
-        guard let revealProgress = revealProgress else { return 1 }
-        return max(0, min(1, revealProgress))
-    }
-
-    var body: some View {
-        ZStack(alignment: .topTrailing) {
-            if let image = platformImage {
-                Image(platformImage: image)
-                    .resizable()
-                    .aspectRatio(aspectRatio, contentMode: .fit)
-                    .clipShape(RoundedRectangle(cornerRadius: 16, style: .continuous))
-                    .overlay(
-                        RoundedRectangle(cornerRadius: 16, style: .continuous)
-                            .stroke(Color.gray.opacity(0.2), lineWidth: 1)
-                    )
-                    .mask(
-                        BlockRevealMask(
-                            fraction: fraction,
-                            columns: 24,
-                            rows: 16
-                        )
-                        .animation(.easeOut(duration: 0.2), value: fraction)
-                    )
-                    .blur(radius: isBlurred ? 20 : 0)
-                    .overlay {
-                        if isBlurred {
-                            RoundedRectangle(cornerRadius: 16, style: .continuous)
-                                .fill(Color.black.opacity(0.35))
-                                .overlay(
-                                    Image(systemName: "eye.slash.fill")
-                                        .font(.bitchatSystem(size: 24, weight: .semibold))
-                                        .foregroundColor(.white.opacity(0.85))
-                                )
-                        }
-                    }
-            } else {
-                RoundedRectangle(cornerRadius: 16, style: .continuous)
-                    .fill(Color.gray.opacity(0.2))
-                    .frame(height: 200)
-                    .overlay(
-                        ProgressView()
-                            .progressViewStyle(.circular)
-                    )
-            }
-
-            if let onCancel = onCancel, isSending {
-                Button(action: onCancel) {
-                    Image(systemName: "xmark")
-                        .font(.bitchatSystem(size: 12, weight: .bold))
-                        .padding(8)
-                        .background(Circle().fill(Color.black.opacity(0.7)))
-                        .foregroundColor(.white)
-                        .padding(8)
-                }
-                .buttonStyle(.plain)
-            }
-        }
-        .onAppear {
-            isBlurred = initiallyBlurred
-            loadImage()
-        }
-        .onChange(of: url) { _ in
-            isBlurred = initiallyBlurred
-            loadImage()
-        }
-        .gesture(mainGesture)
-    }
-
-    private func loadImage() {
-        DispatchQueue.global(qos: .userInitiated).async {
-            #if os(iOS)
-            guard let image = UIImage(contentsOfFile: url.path) else { return }
-            #else
-            guard let image = NSImage(contentsOf: url) else { return }
-            #endif
-            let ratio = image.size.height > 0 ? image.size.width / image.size.height : 1
-            DispatchQueue.main.async {
-                self.platformImage = image
-                self.aspectRatio = ratio
-            }
-        }
-    }
-
-    private var mainGesture: some Gesture {
-        let doubleTap = TapGesture(count: 2).onEnded {
-            guard !isSending else { return }
-            onDelete?()
-        }
-        let singleTap = TapGesture().onEnded {
-            guard !isSending else { return }
-            if isBlurred {
-                withAnimation(.easeOut(duration: 0.2)) {
-                    isBlurred = false
-                }
-            } else {
-                onOpen?()
-            }
-        }
-        let swipe = DragGesture(minimumDistance: 20, coordinateSpace: .local).onEnded { value in
-            guard !isSending else { return }
-            let horizontal = value.translation.width
-            let vertical = value.translation.height
-            guard abs(horizontal) > abs(vertical), abs(horizontal) > 40 else { return }
-            if !isBlurred {
-                withAnimation(.easeInOut(duration: 0.2)) {
-                    isBlurred = true
-                }
-            }
-        }
-        return doubleTap.exclusively(before: singleTap).simultaneously(with: swipe)
-    }
-}
-
-private struct BlockRevealMask: Shape {
-    let fraction: Double
-    let columns: Int
-    let rows: Int
-
-    func path(in rect: CGRect) -> Path {
-        var path = Path()
-        guard fraction > 0, columns > 0, rows > 0 else { return path }
-        let totalBlocks = columns * rows
-        let revealCount = max(0, min(totalBlocks, Int(ceil(fraction * Double(totalBlocks)))))
-        guard revealCount > 0 else { return path }
-        let blockWidth = rect.width / CGFloat(columns)
-        let blockHeight = rect.height / CGFloat(rows)
-        var remaining = revealCount
-        for row in 0..<rows {
-            for column in 0..<columns {
-                if remaining <= 0 { return path }
-                let x = CGFloat(column) * blockWidth
-                let y = CGFloat(row) * blockHeight
-                path.addRect(CGRect(x: x, y: y, width: blockWidth, height: blockHeight))
-                remaining -= 1
-            }
-        }
-        return path
-    }
-}
-
-private extension Image {
-    init(platformImage: PlatformImage) {
-        #if os(iOS)
-        self.init(uiImage: platformImage)
-        #else
-        self.init(nsImage: platformImage)
-        #endif
-    }
-}

bitchat/Views/Media/VoiceNoteView.swift

@@ -1,123 +0,0 @@
-import SwiftUI
-import AVFoundation
-
-struct VoiceNoteView: View {
-    private let url: URL
-    private let isSending: Bool
-    private let sendProgress: Double?
-    private let onCancel: (() -> Void)?
-
-    @Environment(\.colorScheme) private var colorScheme
-    @StateObject private var playback: VoiceNotePlaybackController
-    @State private var waveform: [Float] = []
-
-    init(url: URL, isSending: Bool, sendProgress: Double?, onCancel: (() -> Void)?) {
-        self.url = url
-        self.isSending = isSending
-        self.sendProgress = sendProgress
-        self.onCancel = onCancel
-        _playback = StateObject(wrappedValue: VoiceNotePlaybackController(url: url))
-    }
-
-    private var samples: [Float] {
-        if waveform.isEmpty {
-            return Array(repeating: 0.25, count: 64)
-        }
-        return waveform
-    }
-
-    private var backgroundColor: Color {
-        colorScheme == .dark ? Color.black.opacity(0.6) : Color.white
-    }
-
-    private var borderColor: Color {
-        colorScheme == .dark ? Color.green.opacity(0.3) : Color.green.opacity(0.2)
-    }
-
-    private var durationText: String {
-        let duration = playback.duration
-        guard duration.isFinite, duration > 0 else { return "--:--" }
-        let minutes = Int(duration) / 60
-        let seconds = Int(duration) % 60
-        return String(format: "%02d:%02d", minutes, seconds)
-    }
-
-    private var currentText: String {
-        let current = playback.currentTime
-        guard current.isFinite, current > 0 else { return "00:00" }
-        let minutes = Int(current) / 60
-        let seconds = Int(current) % 60
-        return String(format: "%02d:%02d", minutes, seconds)
-    }
-
-    private var playbackLabel: String {
-        playback.isPlaying ? currentText + "/" + durationText : durationText
-    }
-
-    var body: some View {
-        HStack(spacing: 12) {
-            Button(action: playback.togglePlayback) {
-                Image(systemName: playback.isPlaying ? "pause.fill" : "play.fill")
-                    .foregroundColor(.white)
-                    .frame(width: 36, height: 36)
-                    .background(Circle().fill(Color.green))
-            }
-            .buttonStyle(.plain)
-
-            WaveformView(
-                samples: samples,
-                playbackProgress: playback.progress,
-                sendProgress: sendProgress,
-                onSeek: { fraction in
-                    playback.seek(to: fraction)
-                },
-                isInteractive: playback.isPlaying
-            )
-
-            Text(playbackLabel)
-                .font(.bitchatSystem(size: 13, design: .monospaced))
-                .foregroundColor(Color.secondary)
-
-            if let onCancel = onCancel, isSending {
-                Button(action: onCancel) {
-                    Image(systemName: "xmark")
-                        .font(.bitchatSystem(size: 12, weight: .bold))
-                        .frame(width: 28, height: 28)
-                        .background(Circle().fill(Color.red.opacity(0.9)))
-                        .foregroundColor(.white)
-                }
-                .buttonStyle(.plain)
-            }
-        }
-        .padding(12)
-        .background(
-            RoundedRectangle(cornerRadius: 14)
-                .fill(backgroundColor)
-                .shadow(color: Color.black.opacity(colorScheme == .dark ? 0.3 : 0.1), radius: 6, x: 0, y: 2)
-        )
-        .overlay(
-            RoundedRectangle(cornerRadius: 14)
-                .stroke(borderColor, lineWidth: 1)
-        )
-        .task {
-            // Defer loading to let UI settle after view appears
-            try? await Task.sleep(nanoseconds: 100_000_000) // 0.1s
-            playback.loadDuration()
-            await withCheckedContinuation { continuation in
-                WaveformCache.shared.waveform(for: url, completion: { bins in
-                    waveform = bins
-                    continuation.resume()
-                })
-            }
-        }
-        .onChange(of: url) { newValue in
-            WaveformCache.shared.waveform(for: newValue, completion: { bins in
-                self.waveform = bins
-            })
-            playback.replaceURL(newValue)
-        }
-        .onDisappear {
-            playback.stop()
-        }
-    }
-}

bitchat/Views/Media/WaveformView.swift

@@ -1,67 +0,0 @@
-import SwiftUI
-
-struct WaveformView: View {
-    let samples: [Float]
-    let playbackProgress: Double
-    let sendProgress: Double?
-    let onSeek: ((Double) -> Void)?
-    let isInteractive: Bool
-
-    private var clampedPlayback: Double {
-        max(0, min(1, playbackProgress))
-    }
-
-    private var clampedSend: Double? {
-        guard let sendProgress = sendProgress else { return nil }
-        return max(0, min(1, sendProgress))
-    }
-
-    var body: some View {
-        GeometryReader { geometry in
-            ZStack {
-                Canvas { context, size in
-                    guard !samples.isEmpty else { return }
-                    let width = max(size.width, 1)
-                    let height = max(size.height, 1)
-                    let barWidth = max(width / CGFloat(samples.count), 1)
-                    for (index, sample) in samples.enumerated() {
-                        let normalized = max(0, min(sample, 1))
-                        let barHeight = CGFloat(normalized) * height
-                        let originX = CGFloat(index) * barWidth
-                        let rect = CGRect(
-                            x: originX,
-                            y: (height - barHeight) / 2,
-                            width: max(barWidth * 0.7, 1),
-                            height: barHeight
-                        )
-                        let binPosition = Double(index) / Double(samples.count)
-                        let color: Color
-                        if binPosition <= clampedPlayback {
-                            color = Color.green
-                        } else if let send = clampedSend, binPosition <= send {
-                            color = Color.blue
-                        } else {
-                            color = Color.gray.opacity(0.35)
-                        }
-                        context.fill(Path(rect), with: .color(color))
-                    }
-                }
-                .frame(width: geometry.size.width, height: geometry.size.height)
-
-                if isInteractive, let onSeek = onSeek {
-                    Color.clear
-                        .contentShape(Rectangle())
-                        .gesture(
-                            DragGesture(minimumDistance: 0)
-                                .onEnded { value in
-                                    guard geometry.size.width > 0 else { return }
-                                    let fraction = max(0, min(1, value.location.x / geometry.size.width))
-                                    onSeek(fraction)
-                                }
-                        )
-                }
-            }
-        }
-        .frame(height: 48)
-    }
-}

bitchat/Views/MeshPeerList.swift

@@ -21,8 +21,8 @@ struct MeshPeerList: View {
         let myPeerID = viewModel.meshService.myPeerID
         let mapped: [(peer: BitchatPeer, isMe: Bool, hasUnread: Bool, enc: EncryptionStatus)] = viewModel.allPeers.map { peer in
             let isMe = peer.peerID == myPeerID
-            let hasUnread = viewModel.hasUnreadMessages(for: peer.peerID)
+            let hasUnread = viewModel.hasUnreadMessages(for: peer.peerID.id)
-            let enc = viewModel.getEncryptionStatus(for: peer.peerID)
+            let enc = viewModel.getEncryptionStatus(for: peer.peerID.id)
             return (peer, isMe, hasUnread, enc)
         }
         // Stable visual order without mutating state here
@@ -47,7 +47,7 @@ struct MeshPeerList: View {
                     let peer = item.peer
                     let isMe = item.isMe
                     HStack(spacing: 4) {
-                        let assigned = viewModel.colorForMeshPeer(id: peer.peerID, isDark: colorScheme == .dark)
+                        let assigned = viewModel.colorForMeshPeer(id: peer.peerID.id, isDark: colorScheme == .dark)
                         let baseColor = isMe ? Color.orange : assigned
                         if isMe {
                             Image(systemName: "person.fill")
@@ -89,7 +89,7 @@ struct MeshPeerList: View {
                             }
                         }
 
-                        if !isMe, viewModel.isPeerBlocked(peer.peerID) {
+                        if !isMe, viewModel.isPeerBlocked(peer.peerID.id) {
                             Image(systemName: "nosign")
                                 .font(.bitchatSystem(size: 10))
                                 .foregroundColor(.red)
@@ -105,7 +105,7 @@ struct MeshPeerList: View {
                                 }
                             } else {
                                 // Offline: prefer showing verified badge from persisted fingerprints
-                                if let fp = viewModel.getFingerprint(for: peer.peerID),
+                                if let fp = viewModel.getFingerprint(for: peer.peerID.id),
                                    viewModel.verifiedFingerprints.contains(fp) {
                                     Image(systemName: "checkmark.seal.fill")
                                         .font(.bitchatSystem(size: 10))

bitchat/Views/VerificationViews.swift

@@ -292,7 +292,7 @@ struct VerificationSheetView: View {
     private var boxColor: Color { Color.gray.opacity(0.1) }
 
     private func myQRString() -> String {
-        let npub = try? viewModel.idBridge.getCurrentNostrIdentity()?.npub
+        let npub = try? NostrIdentityBridge.getCurrentNostrIdentity()?.npub
         return VerificationService.shared.buildMyQRString(nickname: viewModel.nickname, npub: npub) ?? ""
     }
 

bitchat/bitchat-macOS.entitlements

@@ -10,19 +10,11 @@
 	</array>
 	<key>com.apple.security.device.bluetooth</key>
 	<true/>
-	<key>com.apple.security.device.microphone</key>
-	<true/>
 	<key>com.apple.security.personal-information.location</key>
 	<true/>
 	<key>com.apple.security.network.client</key>
 	<true/>
 	<key>com.apple.security.network.server</key>
 	<true/>
-	<key>com.apple.security.files.user-selected.read-only</key>
-	<true/>
-	<key>com.apple.security.files.user-selected.read-write</key>
-	<true/>
-	<key>com.apple.security.assets.pictures.read-only</key>
-	<true/>
 </dict>
 </plist>

bitchatShareExtension/Localization/Localizable.xcstrings

@@ -108,13 +108,6 @@
             "value": "공유된 링크",
             "comment": "Fallback title when saving a shared link"
           }
-        },
-        "tr": {
-          "stringUnit": {
-            "state": "translated",
-            "value": "paylaşılan bağlantı",
-            "comment": "Fallback title when saving a shared link"
-          }
         }
       }
     },
@@ -225,13 +218,6 @@
             "value": "링크를 인코딩하는 데 실패했습니다",
             "comment": "Shown when the share payload cannot be encoded"
           }
-        },
-        "tr": {
-          "stringUnit": {
-            "state": "translated",
-            "value": "bağlantı kodlanamadı",
-            "comment": "Shown when the share payload cannot be encoded"
-          }
         }
       }
     },
@@ -342,13 +328,6 @@
             "value": "공유할 수 있는 내용이 없습니다",
             "comment": "Shown when provided content cannot be shared"
           }
-        },
-        "tr": {
-          "stringUnit": {
-            "state": "translated",
-            "value": "paylaşılabilir içerik yok",
-            "comment": "Shown when provided content cannot be shared"
-          }
         }
       }
     },
@@ -459,13 +438,6 @@
             "value": "공유할 내용이 없습니다",
             "comment": "Shown when the share extension receives no content"
           }
-        },
-        "tr": {
-          "stringUnit": {
-            "state": "translated",
-            "value": "paylaşılacak bir şey yok",
-            "comment": "Shown when the share extension receives no content"
-          }
         }
       }
     },
@@ -576,13 +548,6 @@
             "value": "✓ bitchat으로 링크를 공유했습니다",
             "comment": "Confirmation after successfully sharing a link"
           }
-        },
-        "tr": {
-          "stringUnit": {
-            "state": "translated",
-            "value": "✓ bitchat'e bağlantı paylaşıldı",
-            "comment": "Confirmation after successfully sharing a link"
-          }
         }
       }
     },
@@ -693,16 +658,9 @@
             "value": "✓ bitchat으로 텍스트를 공유했습니다",
             "comment": "Confirmation after successfully sharing text"
           }
-        },
-        "tr": {
-          "stringUnit": {
-            "state": "translated",
-            "value": "✓ bitchat'e metin paylaşıldı",
-            "comment": "Confirmation after successfully sharing text"
-          }
         }
       }
     }
   },
   "version": "1.0"
-}
+}

bitchatTests/BLEServiceTests.swift

@@ -6,275 +6,265 @@
 // For more information, see <https://unlicense.org>
 //
 
-import Testing
+import XCTest
 import CoreBluetooth
 @testable import bitchat
 
-struct BLEServiceTests {
+final class BLEServiceTests: XCTestCase {
-    private let service: MockBLEService
-    private let myUUID = UUID()
-    private let bus = MockBLEBus()
     
-    init() {
+    var service: MockBLEService!
-        service = MockBLEService.init(bus: bus)
+    
-        service.myPeerID = PeerID(str: myUUID.uuidString)
+    override func setUp() {
+        super.setUp()
+        service = MockBLEService()
+        service.myPeerID = "TEST1234"
         service.mockNickname = "TestUser"
     }
     
+    override func tearDown() {
+        service = nil
+        super.tearDown()
+    }
+    
     // MARK: - Basic Functionality Tests
     
-    @Test func serviceInitialization() {
+    func testServiceInitialization() {
-        #expect(service.myPeerID == PeerID(str: myUUID.uuidString))
+        XCTAssertNotNil(service)
-        #expect(service.myNickname == "TestUser")
+        XCTAssertEqual(service.myPeerID, "TEST1234")
+        XCTAssertEqual(service.myNickname, "TestUser")
     }
     
-    @Test func peerConnection() {
+    func testPeerConnection() {
-        let somePeerID = PeerID(str: UUID().uuidString)
+        // Test connecting a peer
+        service.simulateConnectedPeer("PEER5678")
+        XCTAssertTrue(service.isPeerConnected("PEER5678"))
+        XCTAssertEqual(service.getConnectedPeers().count, 1)
         
-        service.simulateConnectedPeer(somePeerID)
+        // Test disconnecting a peer
-        #expect(service.isPeerConnected(somePeerID))
+        service.simulateDisconnectedPeer("PEER5678")
-        #expect(service.getConnectedPeers().count == 1)
+        XCTAssertFalse(service.isPeerConnected("PEER5678"))
-        
+        XCTAssertEqual(service.getConnectedPeers().count, 0)
-        service.simulateDisconnectedPeer(somePeerID)
-        #expect(!service.isPeerConnected(somePeerID))
-        #expect(service.getConnectedPeers().count == 0)
     }
     
-    @Test func multiplePeerConnections() {
+    func testMultiplePeerConnections() {
-        let peerID1 = PeerID(str: UUID().uuidString)
+        service.simulateConnectedPeer("PEER1")
-        let peerID2 = PeerID(str: UUID().uuidString)
+        service.simulateConnectedPeer("PEER2")
-        let peerID3 = PeerID(str: UUID().uuidString)
+        service.simulateConnectedPeer("PEER3")
-
-        service.simulateConnectedPeer(peerID1)
-        service.simulateConnectedPeer(peerID2)
-        service.simulateConnectedPeer(peerID3)
         
-        #expect(service.getConnectedPeers().count == 3)
+        XCTAssertEqual(service.getConnectedPeers().count, 3)
-        #expect(service.isPeerConnected(peerID1))
+        XCTAssertTrue(service.isPeerConnected("PEER1"))
-        #expect(service.isPeerConnected(peerID2))
+        XCTAssertTrue(service.isPeerConnected("PEER2"))
-        #expect(service.isPeerConnected(peerID3))
+        XCTAssertTrue(service.isPeerConnected("PEER3"))
         
-        service.simulateDisconnectedPeer(peerID2)
+        service.simulateDisconnectedPeer("PEER2")
-        #expect(service.getConnectedPeers().count == 2)
+        XCTAssertEqual(service.getConnectedPeers().count, 2)
-        #expect(!service.isPeerConnected(peerID2))
+        XCTAssertFalse(service.isPeerConnected("PEER2"))
     }
     
     // MARK: - Message Sending Tests
     
-    @Test func sendPublicMessage() async throws {
+    func testSendPublicMessage() {
-        try await confirmation { receivedPublicMessage in
+        let expectation = XCTestExpectation(description: "Message sent")
-            let delegate = MockBitchatDelegate { message in
+        
-                #expect(message.content == "Hello, world!")
+        let delegate = MockBitchatDelegate { message in
-                #expect(message.sender == "TestUser")
+            XCTAssertEqual(message.content, "Hello, world!")
-                #expect(!message.isPrivate)
+            XCTAssertEqual(message.sender, "TestUser")
-                receivedPublicMessage()
+            XCTAssertFalse(message.isPrivate)
-            }
+            expectation.fulfill()
-            service.delegate = delegate
-            service.sendMessage("Hello, world!")
-            
-            // Allow async processing
-            try await sleep(0.5)
         }
-        #expect(service.sentMessages.count == 1)
+        service.delegate = delegate
+        
+        service.sendMessage("Hello, world!")
+        
+        wait(for: [expectation], timeout: 1.0)
+        XCTAssertEqual(service.sentMessages.count, 1)
     }
     
-    @Test func sendPrivateMessage() async throws {
+    func testSendPrivateMessage() {
-        try await confirmation { receivedPrivateMessage in
+        let expectation = XCTestExpectation(description: "Private message sent")
-            let delegate = MockBitchatDelegate { message in
+        
-                #expect(message.content == "Secret message")
+        let delegate = MockBitchatDelegate { message in
-                #expect(message.sender == "TestUser")
+            XCTAssertEqual(message.content, "Secret message")
-                #expect(message.senderPeerID == PeerID(str: myUUID.uuidString))
+            XCTAssertEqual(message.sender, "TestUser")
-                #expect(message.isPrivate)
+            XCTAssertTrue(message.isPrivate)
-                #expect(message.recipientNickname == "Bob")
+            XCTAssertEqual(message.recipientNickname, "Bob")
-                receivedPrivateMessage()
+            expectation.fulfill()
-            }
-            service.delegate = delegate
-            service.sendPrivateMessage(
-                "Secret message",
-                to: PeerID(str: UUID().uuidString),
-                recipientNickname: "Bob",
-                messageID: "MSG123"
-            )
-            
-            // Allow async processing
-            try await sleep(0.5)
         }
-        #expect(service.sentMessages.count == 1)
+        service.delegate = delegate
+        
+        service.sendPrivateMessage("Secret message", to: "PEER5678", recipientNickname: "Bob", messageID: "MSG123")
+        
+        wait(for: [expectation], timeout: 1.0)
+        XCTAssertEqual(service.sentMessages.count, 1)
     }
     
-    @Test func sendMessageWithMentions() async throws {
+    func testSendMessageWithMentions() {
-        try await confirmation { receivedMessageWithMentions in
+        let expectation = XCTestExpectation(description: "Message with mentions sent")
-            let delegate = MockBitchatDelegate { message in
+        
-                #expect(message.content == "@alice @bob check this out")
+        let delegate = MockBitchatDelegate { message in
-                #expect(message.mentions == ["alice", "bob"])
+            XCTAssertEqual(message.content, "@alice @bob check this out")
-                receivedMessageWithMentions()
+            XCTAssertEqual(message.mentions, ["alice", "bob"])
-            }
+            expectation.fulfill()
-            service.delegate = delegate
-            service.sendMessage("@alice @bob check this out", mentions: ["alice", "bob"])
-            
-            // Allow async processing
-            try await sleep(0.5)
         }
+        service.delegate = delegate
+        
+        service.sendMessage("@alice @bob check this out", mentions: ["alice", "bob"])
+        
+        wait(for: [expectation], timeout: 1.0)
     }
     
     // MARK: - Message Reception Tests
     
-    @Test func simulateIncomingMessage() async throws {
+    func testSimulateIncomingMessage() {
-        try await confirmation { receiveMessage in
+        let expectation = XCTestExpectation(description: "Message received")
-            let peerID = PeerID(str: UUID().uuidString)
+        
-            
+        let delegate = MockBitchatDelegate { message in
-            let delegate = MockBitchatDelegate { message in
+            XCTAssertEqual(message.content, "Incoming message")
-                #expect(message.content == "Incoming message")
+            XCTAssertEqual(message.sender, "RemoteUser")
-                #expect(message.sender == "RemoteUser")
+            expectation.fulfill()
-                #expect(message.senderPeerID == peerID)
-                receiveMessage()
-            }
-            service.delegate = delegate
-            
-            let incomingMessage = BitchatMessage(
-                id: "MSG456",
-                sender: "RemoteUser",
-                content: "Incoming message",
-                timestamp: Date(),
-                isRelay: false,
-                originalSender: nil,
-                isPrivate: false,
-                recipientNickname: nil,
-                senderPeerID: peerID,
-                mentions: nil
-            )
-            service.simulateIncomingMessage(incomingMessage)
-            
-            // Allow async processing
-            try await sleep(0.5)
         }
+        service.delegate = delegate
+        
+        let incomingMessage = BitchatMessage(
+            id: "MSG456",
+            sender: "RemoteUser",
+            content: "Incoming message",
+            timestamp: Date(),
+            isRelay: false,
+            originalSender: nil,
+            isPrivate: false,
+            recipientNickname: nil,
+            senderPeerID: "REMOTE123",
+            mentions: nil
+        )
+        
+        service.simulateIncomingMessage(incomingMessage)
+        
+        wait(for: [expectation], timeout: 1.0)
     }
     
-    @Test func simulateIncomingPacket() async throws {
+    func testSimulateIncomingPacket() {
-        try await confirmation { processPacket in
+        let expectation = XCTestExpectation(description: "Packet processed")
-            let peerID = PeerID(str: UUID().uuidString)
+        
-            
+        let delegate = MockBitchatDelegate { message in
-            let delegate = MockBitchatDelegate { message in
+            XCTAssertEqual(message.content, "Packet message")
-                #expect(message.content == "Packet message")
+            expectation.fulfill()
-                #expect(message.senderPeerID == peerID)
-                processPacket()
-            }
-            service.delegate = delegate
-            
-            let message = BitchatMessage(
-                id: "MSG789",
-                sender: "PacketSender",
-                content: "Packet message",
-                timestamp: Date(),
-                isRelay: false,
-                originalSender: nil,
-                isPrivate: false,
-                recipientNickname: nil,
-                senderPeerID: peerID,
-                mentions: nil
-            )
-            
-            let payload = try #require(message.toBinaryPayload(), "Failed to create binary payload")
-            
-            let packet = BitchatPacket(
-                type: 0x01,
-                senderID: peerID.id.data(using: .utf8)!,
-                recipientID: nil,
-                timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
-                payload: payload,
-                signature: nil,
-                ttl: 3
-            )
-            
-            service.simulateIncomingPacket(packet)
-            
-            // Allow async processing
-            try await sleep(0.5)
         }
+        service.delegate = delegate
+        
+        let message = BitchatMessage(
+            id: "MSG789",
+            sender: "PacketSender",
+            content: "Packet message",
+            timestamp: Date(),
+            isRelay: false,
+            originalSender: nil,
+            isPrivate: false,
+            recipientNickname: nil,
+            senderPeerID: "PACKET123",
+            mentions: nil
+        )
+        
+        guard let payload = message.toBinaryPayload() else {
+            XCTFail("Failed to create binary payload")
+            return
+        }
+        
+        let packet = BitchatPacket(
+            type: 0x01,
+            senderID: "PACKET123".data(using: .utf8)!,
+            recipientID: nil,
+            timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
+            payload: payload,
+            signature: nil,
+            ttl: 3
+        )
+        
+        service.simulateIncomingPacket(packet)
+        
+        wait(for: [expectation], timeout: 1.0)
     }
     
     // MARK: - Peer Nickname Tests
     
-    @Test func getPeerNicknames() {
+    func testGetPeerNicknames() {
-        let peerID1 = PeerID(str: UUID().uuidString)
+        service.simulateConnectedPeer("PEER1")
-        let peerID2 = PeerID(str: UUID().uuidString)
+        service.simulateConnectedPeer("PEER2")
-
-        service.simulateConnectedPeer(peerID1)
-        service.simulateConnectedPeer(peerID2)
         
         let nicknames = service.getPeerNicknames()
-        #expect(nicknames.count == 2)
+        XCTAssertEqual(nicknames.count, 2)
-        #expect(nicknames[peerID1] == "MockPeer_\(peerID1)")
+        XCTAssertEqual(nicknames["PEER1"], "MockPeer_PEER1")
-        #expect(nicknames[peerID2] == "MockPeer_\(peerID2)")
+        XCTAssertEqual(nicknames["PEER2"], "MockPeer_PEER2")
     }
     
     // MARK: - Service State Tests
     
-    @Test func startStopServices() {
+    func testStartStopServices() {
+        // These are mock implementations, just ensure they don't crash
         service.startServices()
         service.stopServices()
-        let somePeerID = PeerID(str: UUID().uuidString)
+        
-        service.simulateConnectedPeer(somePeerID)
+        // Service should still be functional after start/stop
-        #expect(service.isPeerConnected(somePeerID))
+        service.simulateConnectedPeer("PEER999")
+        XCTAssertTrue(service.isPeerConnected("PEER999"))
     }
     
     // MARK: - Message Delivery Handler Tests
     
-    @Test func messageDeliveryHandler() async throws {
+    func testMessageDeliveryHandler() {
-        try await confirmation { deliveryHandler in
+        let expectation = XCTestExpectation(description: "Delivery handler called")
-            service.packetDeliveryHandler = { packet in
+        
-                if let msg = BitchatMessage(packet.payload) {
+        service.packetDeliveryHandler = { packet in
-                    #expect(msg.content == "Test delivery")
+            if let msg = BitchatMessage(packet.payload) {
-                    deliveryHandler()
+                XCTAssertEqual(msg.content, "Test delivery")
-                }
+                expectation.fulfill()
             }
-            service.sendMessage("Test delivery")
-            
-            // Allow async processing
-            try await sleep(0.5)
         }
+        
+        service.sendMessage("Test delivery")
+        
+        wait(for: [expectation], timeout: 1.0)
     }
     
-    @Test func packetDeliveryHandler() async throws {
+    func testPacketDeliveryHandler() {
-        try await confirmation("Packet handler called") { packetHandler in
+        let expectation = XCTestExpectation(description: "Packet handler called")
-            let peerID = PeerID(str: UUID().uuidString)
+        
-            
+        service.packetDeliveryHandler = { packet in
-            service.packetDeliveryHandler = { packet in
+            XCTAssertEqual(packet.type, 0x01)
-                #expect(packet.type == 0x01)
+            expectation.fulfill()
-                #expect(packet.senderID == Data(peerID.id.utf8))
-                packetHandler()
-            }
-            
-            let message = BitchatMessage(
-                id: "PKT123",
-                sender: "TestSender",
-                content: "Test packet",
-                timestamp: Date(),
-                isRelay: false,
-                originalSender: nil,
-                isPrivate: false,
-                recipientNickname: nil,
-                senderPeerID: peerID,
-                mentions: nil
-            )
-            
-            let payload = try #require(message.toBinaryPayload(), "Failed to create payload")
-            
-            let packet = BitchatPacket(
-                type: 0x01,
-                senderID: peerID.id.data(using: .utf8)!,
-                recipientID: nil,
-                timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
-                payload: payload,
-                signature: nil,
-                ttl: 3
-            )
-            
-            service.simulateIncomingPacket(packet)
-            
-            // Allow async processing
-            try await sleep(0.5)
         }
+        
+        let message = BitchatMessage(
+            id: "PKT123",
+            sender: "TestSender",
+            content: "Test packet",
+            timestamp: Date(),
+            isRelay: false,
+            originalSender: nil,
+            isPrivate: false,
+            recipientNickname: nil,
+            senderPeerID: "TEST123",
+            mentions: nil
+        )
+        
+        guard let payload = message.toBinaryPayload() else {
+            XCTFail("Failed to create payload")
+            return
+        }
+        
+        let packet = BitchatPacket(
+            type: 0x01,
+            senderID: "TEST123".data(using: .utf8)!,
+            recipientID: nil,
+            timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
+            payload: payload,
+            signature: nil,
+            ttl: 3
+        )
+        
+        service.simulateIncomingPacket(packet)
+        
+        wait(for: [expectation], timeout: 1.0)
     }
 }
 

bitchatTests/CommandProcessorTests.swift

@@ -1,42 +1,54 @@
-import Testing
+import XCTest
 @testable import bitchat
 
-struct CommandProcessorTests {
+final class CommandProcessorTests: XCTestCase {
-    private var identityManager = MockIdentityManager(MockKeychain())
+    
+    var identityManager: MockIdentityManager!
+    
+    override func setUp() {
+        super.setUp()
+        // Provide a minimal identity manager for commands that query identity/block lists
+        identityManager = MockIdentityManager(MockKeychain())
+    }
+    
+    override func tearDown() {
+        identityManager = nil
+        super.tearDown()
+    }
 
     @MainActor
-    @Test func slapNotFoundGrammar() {
+    func test_slap_notFoundGrammar() {
         let processor = CommandProcessor(chatViewModel: nil, meshService: nil, identityManager: identityManager)
         let result = processor.process("/slap @system")
         switch result {
         case .error(let message):
-            #expect(message == "cannot slap system: not found")
+            XCTAssertEqual(message, "cannot slap system: not found")
         default:
-            Issue.record("Expected error result")
+            XCTFail("Expected error result")
         }
     }
 
     @MainActor
-    @Test func hugNotFoundGrammar() {
+    func test_hug_notFoundGrammar() {
         let processor = CommandProcessor(chatViewModel: nil, meshService: nil, identityManager: identityManager)
         let result = processor.process("/hug @system")
         switch result {
         case .error(let message):
-            #expect(message == "cannot hug system: not found")
+            XCTAssertEqual(message, "cannot hug system: not found")
         default:
-            Issue.record("Expected error result")
+            XCTFail("Expected error result")
         }
     }
-    
+
     @MainActor
-    @Test func slapUsageMessage() {
+    func test_slap_usageMessage() {
         let processor = CommandProcessor(chatViewModel: nil, meshService: nil, identityManager: identityManager)
         let result = processor.process("/slap")
         switch result {
         case .error(let message):
-            #expect(message == "usage: /slap <nickname>")
+            XCTAssertEqual(message, "usage: /slap <nickname>")
         default:
-            Issue.record("Expected error result for usage message")
+            XCTFail("Expected error result for usage message")
         }
     }
 }

bitchatTests/EndToEnd/PrivateChatE2ETests.swift

@@ -11,19 +11,21 @@ import CryptoKit
 import struct Foundation.UUID
 @testable import bitchat
 
+// TODO: Remove once MockBLEService is refactored to fix race condition
+@Suite(.serialized)
 struct PrivateChatE2ETests {
     
     private let alice: MockBLEService
     private let bob: MockBLEService
     private let charlie: MockBLEService
-    private let mockKeychain = MockKeychain()
+    private let mockKeychain: MockKeychain
-    private let bus = MockBLEBus()
     
     init() {
         // Create services with unique peer IDs to avoid any collision
-        alice = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname1, bus: bus)
+        alice = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname1)
-        bob = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname2, bus: bus)
+        bob = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname2)
-        charlie = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname3, bus: bus)
+        charlie = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname3)
+        mockKeychain = MockKeychain()
     }
     
     // MARK: - Basic Private Messaging Tests
@@ -51,7 +53,7 @@ struct PrivateChatE2ETests {
             )
 
             // Wait a bit to ensure message would have been delivered if it was going to be
-            try? await sleep(0.1)
+            try? await Task.sleep(nanoseconds: UInt64(TestConstants.shortTimeout * 1_000_000_000))
         }
 
         #expect(!bobReceivedMessage, "Bob should not have received the message")
@@ -169,7 +171,7 @@ struct PrivateChatE2ETests {
             // Send encrypted private message
             alice.sendPrivateMessage(
                 TestConstants.testMessage1,
-                to: bob.peerID,
+                to: TestConstants.testPeerID2,
                 recipientNickname: TestConstants.testNickname2
             )
         }
@@ -233,7 +235,7 @@ struct PrivateChatE2ETests {
             for i in 0..<messageCount {
                 alice.sendPrivateMessage(
                     "Private message \(i)",
-                    to: bob.peerID,
+                    to: TestConstants.testPeerID2,
                     recipientNickname: TestConstants.testNickname2
                 )
             }
@@ -252,7 +254,7 @@ struct PrivateChatE2ETests {
 
             alice.sendPrivateMessage(
                 TestConstants.testLongMessage,
-                to: bob.peerID,
+                to: TestConstants.testPeerID2,
                 recipientNickname: TestConstants.testNickname2
             )
         }

bitchatTests/EndToEnd/PublicChatE2ETests.swift

@@ -10,22 +10,22 @@ import Testing
 import struct Foundation.UUID
 @testable import bitchat
 
+@Suite(.serialized)
 struct PublicChatE2ETests {
     
     private let alice: MockBLEService
     private let bob: MockBLEService
     private let charlie: MockBLEService
     private let david: MockBLEService
-    private let bus = MockBLEBus()
     
     private var receivedMessages: [String: [BitchatMessage]] = [:]
     
     init() {
         // Create mock services with unique peer IDs to avoid any collision
-        alice = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname1, bus: bus)
+        alice = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname1)
-        bob = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname2, bus: bus)
+        bob = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname2)
-        charlie = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname3, bus: bus)
+        charlie = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname3)
-        david = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname4, bus: bus)
+        david = MockBLEService(peerID: PeerID(str: UUID().uuidString), nickname: TestConstants.testNickname4)
     }
     
     // MARK: - Basic Broadcasting Tests

bitchatTests/Fragmentation/FragmentationTests.swift

@@ -15,26 +15,20 @@ struct FragmentationTests {
     
     private let mockKeychain: MockKeychain
     private let mockIdentityManager: MockIdentityManager
-    private let idBridge: NostrIdentityBridge
     
     init() {
         mockKeychain = MockKeychain()
         mockIdentityManager = MockIdentityManager(mockKeychain)
-        idBridge = NostrIdentityBridge(keychain: MockKeychainHelper())
     }
     
     @Test("Reassembly from fragments delivers a public message")
     func reassemblyFromFragmentsDeliversPublicMessage() async throws {
-        let ble = BLEService(
+        let ble = BLEService(keychain: mockKeychain, identityManager: mockIdentityManager)
-            keychain: mockKeychain,
-            idBridge: idBridge,
-            identityManager: mockIdentityManager
-        )
         let capture = CaptureDelegate()
         ble.delegate = capture
         
         // Construct a big packet (3KB) from a remote sender (not our own ID)
-        let remoteShortID = PeerID(str: "1122334455667788")
+        let remoteShortID: PeerID = "1122334455667788"
         let original = makeLargePublicPacket(senderShortHex: remoteShortID, size: 3_000)
         
         // Use a small fragment size to ensure multiple pieces
@@ -45,15 +39,15 @@ struct FragmentationTests {
         
         // Inject fragments spaced out to avoid concurrent mutation inside BLEService
         for (i, fragment) in shuffled.enumerated() {
-            let delay = 5 * Double(i) * 0.001
+            let delay = UInt64(5 * i) * 1_000_000 // nanoseconds
             Task {
-                try await sleep(delay)
+                try await Task.sleep(nanoseconds: delay)
                 ble._test_handlePacket(fragment, fromPeerID: remoteShortID)
             }
         }
         
         // Allow async processing
-        try await sleep(0.5)
+        try await Task.sleep(nanoseconds: 500_000_000) // 0.5s
         
         #expect(capture.publicMessages.count == 1)
         #expect(capture.publicMessages.first?.content.count == 3_000)
@@ -61,15 +55,11 @@ struct FragmentationTests {
     
     @Test("Duplicate fragment does not break reassembly")
     func duplicateFragmentDoesNotBreakReassembly() async throws {
-        let ble = BLEService(
+        let ble = BLEService(keychain: mockKeychain, identityManager: mockIdentityManager)
-            keychain: mockKeychain,
-            idBridge: idBridge,
-            identityManager: mockIdentityManager
-        )
         let capture = CaptureDelegate()
         ble.delegate = capture
         
-        let remoteShortID = PeerID(str: "A1B2C3D4E5F60708")
+        let remoteShortID: PeerID = "A1B2C3D4E5F60708"
         let original = makeLargePublicPacket(senderShortHex: remoteShortID, size: 2048)
         var frags = fragmentPacket(original, fragmentSize: 300)
         
@@ -79,87 +69,27 @@ struct FragmentationTests {
         }
         
         for (i, fragment) in frags.enumerated() {
-            let delay = 5 * Double(i) * 0.001
+            let delay = UInt64(5 * i) * 1_000_000 // nanoseconds
             Task {
-                try await sleep(delay)
+                try await Task.sleep(nanoseconds: delay)
                 ble._test_handlePacket(fragment, fromPeerID: remoteShortID)
             }
         }
         
         // Allow async processing
-        try await sleep(0.5)
+        try await Task.sleep(nanoseconds: 500_000_000) // 0.5s
-
+        
         #expect(capture.publicMessages.count == 1)
         #expect(capture.publicMessages.first?.content.count == 2048)
     }
-
-    @Test("Max-sized file transfer survives reassembly")
-    func maxSizedFileTransferSurvivesReassembly() async throws {
-        let ble = BLEService(
-            keychain: mockKeychain,
-            idBridge: idBridge,
-            identityManager: mockIdentityManager
-        )
-        let capture = CaptureDelegate()
-        ble.delegate = capture
-
-        let remoteID = PeerID(str: "CAFEBABECAFEBABE")
-        let fileContent = Data(repeating: 0x42, count: FileTransferLimits.maxPayloadBytes)
-        let filePacket = BitchatFilePacket(
-            fileName: "limit.bin",
-            fileSize: UInt64(fileContent.count),
-            mimeType: "application/octet-stream",
-            content: fileContent
-        )
-        let encoded = try #require(filePacket.encode(), "File packet encoding failed")
-
-        let packet = BitchatPacket(
-            type: MessageType.fileTransfer.rawValue,
-            senderID: Data(hexString: remoteID.id) ?? Data(),
-            recipientID: nil,
-            timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
-            payload: encoded,
-            signature: nil,
-            ttl: 7,
-            version: 2
-        )
-
-        let fragments = fragmentPacket(packet, fragmentSize: 4096, pad: false)
-        #expect(!fragments.isEmpty)
-
-        for (i, fragment) in fragments.enumerated() {
-            let delay = 5 * Double(i) * 0.001
-            Task {
-                try await sleep(delay)
-                ble._test_handlePacket(fragment, fromPeerID: remoteID)
-            }
-        }
-
-        try await sleep(1.0)
-
-        let message = try #require(capture.receivedMessages.first, "Expected file transfer message")
-        #expect(message.content.hasPrefix("[file]"))
-
-        if let fileName = message.content.split(separator: " ").last {
-            let base = try FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
-            let filesRoot = base.appendingPathComponent("files", isDirectory: true)
-            let incoming = filesRoot.appendingPathComponent("files/incoming", isDirectory: true)
-            let url = incoming.appendingPathComponent(String(fileName))
-            try? FileManager.default.removeItem(at: url)
-        }
-    }
     
     @Test("Invalid fragment header is ignored")
     func invalidFragmentHeaderIsIgnored() async throws {
-        let ble = BLEService(
+        let ble = BLEService(keychain: mockKeychain, identityManager: mockIdentityManager)
-            keychain: mockKeychain,
-            idBridge: idBridge,
-            identityManager: mockIdentityManager
-        )
         let capture = CaptureDelegate()
         ble.delegate = capture
         
-        let remoteShortID = PeerID(str: "0011223344556677")
+        let remoteShortID: PeerID = "0011223344556677"
         let original = makeLargePublicPacket(senderShortHex: remoteShortID, size: 1000)
         let fragments = fragmentPacket(original, fragmentSize: 250)
         
@@ -180,16 +110,16 @@ struct FragmentationTests {
         }
         
         for (i, fragment) in corrupted.enumerated() {
-            let delay = 5 * Double(i) * 0.001
+            let delay = UInt64(5 * i) * 1_000_000 // nanoseconds
             Task {
-                try await sleep(delay)
+                try await Task.sleep(nanoseconds: delay)
                 ble._test_handlePacket(fragment, fromPeerID: remoteShortID)
             }
         }
         
         // Allow async processing
-        try await sleep(0.5)
+        try await Task.sleep(nanoseconds: 500_000_000) // 0.5s
-
+        
         // Should not deliver since one fragment is invalid and reassembly can't complete
         #expect(capture.publicMessages.isEmpty)
     }
@@ -198,10 +128,7 @@ struct FragmentationTests {
 extension FragmentationTests {
     private final class CaptureDelegate: BitchatDelegate {
         var publicMessages: [(peerID: PeerID, nickname: String, content: String)] = []
-        var receivedMessages: [BitchatMessage] = []
+        func didReceiveMessage(_ message: BitchatMessage) {}
-        func didReceiveMessage(_ message: BitchatMessage) {
-            receivedMessages.append(message)
-        }
         func didConnectToPeer(_ peerID: PeerID) {}
         func didDisconnectFromPeer(_ peerID: PeerID) {}
         func didUpdatePeerList(_ peers: [PeerID]) {}
@@ -232,8 +159,8 @@ extension FragmentationTests {
     }
 
     // Helper: fragment a packet using the same header format BLEService expects
-    private func fragmentPacket(_ packet: BitchatPacket, fragmentSize: Int, fragmentID: Data? = nil, pad: Bool = true) -> [BitchatPacket] {
+    private func fragmentPacket(_ packet: BitchatPacket, fragmentSize: Int, fragmentID: Data? = nil) -> [BitchatPacket] {
-        guard let fullData = packet.toBinaryData(padding: pad) else { return [] }
+        let fullData = packet.toBinaryData() ?? Data()
         let fid = fragmentID ?? Data((0..<8).map { _ in UInt8.random(in: 0...255) })
         let chunks: [Data] = stride(from: 0, to: fullData.count, by: fragmentSize).map { off in
             Data(fullData[off..<min(off + fragmentSize, fullData.count)])

bitchatTests/GCSFilterTests.swift

@@ -1,23 +1,22 @@
-import Testing
+import XCTest
-import struct Foundation.Data
 @testable import bitchat
 
-struct GCSFilterTests {
+final class GCSFilterTests: XCTestCase {
-    @Test func buildFilterWithDuplicateIdsProducesStableEncoding() {
+    func testBuildFilterWithDuplicateIdsProducesStableEncoding() {
         let id = Data(repeating: 0xAB, count: 16)
         let ids = Array(repeating: id, count: 64)
 
         let params = GCSFilter.buildFilter(ids: ids, maxBytes: 128, targetFpr: 0.01)
-        #expect(params.m >= 1)
+        XCTAssertGreaterThanOrEqual(params.m, 1)
 
         let decoded = GCSFilter.decodeToSortedSet(p: params.p, m: params.m, data: params.data)
-        #expect(decoded.count <= 1)
+        XCTAssertLessThanOrEqual(decoded.count, 1)
     }
 
-    @Test func bucketAvoidsZeroCandidate() {
+    func testBucketAvoidsZeroCandidate() {
         let id = Data(repeating: 0x01, count: 16)
         let bucket = GCSFilter.bucket(for: id, modulus: 2)
-        #expect(bucket != 0)
+        XCTAssertNotEqual(bucket, 0)
-        #expect(bucket < 2)
+        XCTAssertLessThan(bucket, 2)
     }
 }

bitchatTests/GeohashBookmarksStoreTests.swift

@@ -1,38 +1,52 @@
-import Testing
+import XCTest
-import Foundation
 @testable import bitchat
 
-struct GeohashBookmarksStoreTests {
+final class GeohashBookmarksStoreTests: XCTestCase {
-    private let storeKey = "locationChannel.bookmarks"
+    let storeKey = "locationChannel.bookmarks"
-    private let storage = UserDefaults(suiteName: UUID().uuidString)!
+    var storage: UserDefaults!
-    private let store: GeohashBookmarksStore
+    var store: GeohashBookmarksStore!
 
-    init() {
+    override func setUp() {
-        store = GeohashBookmarksStore(storage: storage)
+        super.setUp()
+        // Unique instance for each test to avoid race condition
+        storage = UserDefaults(suiteName: UUID().uuidString)
+        store = GeohashBookmarksStore(storage: storage!)
     }
 
-    @Test func toggleAndNormalize() {
+    override func tearDown() {
+        storage.removeObject(forKey: storeKey)
+        store._resetForTesting()
+        store = nil
+        storage = nil
+        super.tearDown()
+    }
+
+    func testToggleAndNormalize() {
         // Start clean
-        #expect(store.bookmarks.isEmpty)
+        XCTAssertTrue(store.bookmarks.isEmpty)
 
         // Add with mixed case and hash prefix
         store.toggle("#U4PRUY")
-        #expect(store.isBookmarked("u4pruy"))
+        XCTAssertTrue(store.isBookmarked("u4pruy"))
-        #expect(store.bookmarks.first == "u4pruy")
+        XCTAssertEqual(store.bookmarks.first, "u4pruy")
 
         // Toggling again removes
         store.toggle("u4pruy")
-        #expect(!store.isBookmarked("u4pruy"))
+        XCTAssertFalse(store.isBookmarked("u4pruy"))
-        #expect(store.bookmarks.isEmpty)
+        XCTAssertTrue(store.bookmarks.isEmpty)
     }
 
-    @Test func persistenceWritten() throws {
+    func testPersistenceWritten() throws {
         store.toggle("ezs42")
         store.toggle("u4pruy")
+
         // Verify persisted JSON contains both (order not enforced here)
-        let data = try #require(storage.data(forKey: storeKey), "No persisted data found")
+        guard let data = storage.data(forKey: storeKey) else {
+            XCTFail("No persisted data found")
+            return
+        }
         let arr = try JSONDecoder().decode([String].self, from: data)
-        #expect(arr.contains("ezs42"))
+        XCTAssertTrue(arr.contains("ezs42"))
-        #expect(arr.contains("u4pruy"))
+        XCTAssertTrue(arr.contains("u4pruy"))
     }
 }

bitchatTests/GossipSyncManagerTests.swift

@@ -1,28 +1,24 @@
 import Foundation
-import Testing
+import XCTest
 @testable import bitchat
 
-struct GossipSyncManagerTests {
+final class GossipSyncManagerTests: XCTestCase {
-
+    func testConcurrentPacketIntakeAndSyncRequest() {
-    private let myPeerID = PeerID(str: "0102030405060708")
+        let manager = GossipSyncManager(myPeerID: "0102030405060708")
-    
-    @Test func concurrentPacketIntakeAndSyncRequest() async throws {
-        let manager = GossipSyncManager(myPeerID: myPeerID)
         let delegate = RecordingDelegate()
+        let sendExpectation = expectation(description: "sync request sent")
+        delegate.onSend = { sendExpectation.fulfill() }
         manager.delegate = delegate
 
-        try await confirmation("sync request sent") { sent in
+        let iterations = 200
-            delegate.onSend = {
+        let group = DispatchGroup()
-                sent()
-            }
 
-            let iterations = 200
+        for i in 0..<iterations {
-            let senderID = try #require(Data(hexString: "1122334455667788"))
+            group.enter()
-            
+            DispatchQueue.global(qos: .userInitiated).async {
-            for i in 0..<iterations {
                 let packet = BitchatPacket(
                     type: MessageType.message.rawValue,
-                    senderID: senderID,
+                    senderID: Data(hexString: "1122334455667788") ?? Data(),
                     recipientID: nil,
                     timestamp: 1_000_000 + UInt64(i),
                     payload: Data([UInt8(truncatingIfNeeded: i)]),
@@ -30,100 +26,25 @@ struct GossipSyncManagerTests {
                     ttl: 1
                 )
                 manager.onPublicPacketSeen(packet)
-                try await sleep(0.001)
+                Thread.sleep(forTimeInterval: 0.001)
+                group.leave()
             }
-
-            manager.scheduleInitialSyncToPeer(PeerID(str: "FFFFFFFFFFFFFFFF"), delaySeconds: 0.0)
-            try await sleep(0.002)
         }
 
-        let lastPacket = try #require(delegate.lastPacket, "Expected sync packet to be sent")
+        DispatchQueue.global(qos: .userInitiated).asyncAfter(deadline: .now() + 0.002) {
-        #expect(lastPacket.type == MessageType.requestSync.rawValue)
+            manager.scheduleInitialSyncToPeer("FFFFFFFFFFFFFFFF", delaySeconds: 0.0)
-        #expect(RequestSyncPacket.decode(from: lastPacket.payload) != nil)
+        }
-    }
 
-    @Test func staleAnnouncementsArePurgedWithMessages() throws {
+        group.wait()
-        var config = GossipSyncManager.Config()
+        wait(for: [sendExpectation], timeout: 2.0)
-        config.stalePeerCleanupIntervalSeconds = 0
-        config.stalePeerTimeoutSeconds = 5
 
-        let manager = GossipSyncManager(myPeerID: myPeerID, config: config)
+        guard let lastPacket = delegate.lastPacket else {
-        let peerHex = "0011223344556677"
+            XCTFail("Expected sync packet to be sent")
-        let senderData = try #require(Data(hexString: peerHex))
+            return
-        let initialTimestampMs = UInt64(Date().timeIntervalSince1970 * 1000)
+        }
 
-        let announcePacket = BitchatPacket(
+        XCTAssertEqual(lastPacket.type, MessageType.requestSync.rawValue)
-            type: MessageType.announce.rawValue,
+        XCTAssertNotNil(RequestSyncPacket.decode(from: lastPacket.payload))
-            senderID: senderData,
-            recipientID: nil,
-            timestamp: initialTimestampMs,
-            payload: Data(),
-            signature: nil,
-            ttl: 1
-        )
-
-        let messagePacket = BitchatPacket(
-            type: MessageType.message.rawValue,
-            senderID: senderData,
-            recipientID: nil,
-            timestamp: initialTimestampMs,
-            payload: Data([0x01]),
-            signature: nil,
-            ttl: 1
-        )
-
-        manager.onPublicPacketSeen(announcePacket)
-        manager.onPublicPacketSeen(messagePacket)
-
-        // Flush queue without triggering stale cleanup yet
-        manager._performMaintenanceSynchronously(now: Date())
-        #expect(manager._hasAnnouncement(for: PeerID(str: peerHex)))
-        #expect(manager._messageCount(for: PeerID(str: peerHex)) == 1)
-        
-        // Run cleanup past the timeout
-        let future = Date().addingTimeInterval(config.stalePeerTimeoutSeconds + 1)
-        manager._performMaintenanceSynchronously(now: future)
-        #expect(manager._hasAnnouncement(for: PeerID(str: peerHex)) == false)
-        #expect(manager._messageCount(for: PeerID(str: peerHex)) == 0)
-    }
-
-    @Test func ignoresAnnounceOlderThanStaleTimeout() throws {
-        var config = GossipSyncManager.Config()
-        config.stalePeerTimeoutSeconds = 5
-        config.maxMessageAgeSeconds = 100
-
-        let manager = GossipSyncManager(myPeerID: myPeerID, config: config)
-        let peerHex = "8899aabbccddeeff"
-        let senderData = try #require(Data(hexString: peerHex))
-        let staleTimestampMs = UInt64(Date().addingTimeInterval(-(config.stalePeerTimeoutSeconds + 1)).timeIntervalSince1970 * 1000)
-
-        let freshMessage = BitchatPacket(
-            type: MessageType.message.rawValue,
-            senderID: senderData,
-            recipientID: nil,
-            timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
-            payload: Data([0xAA]),
-            signature: nil,
-            ttl: 1
-        )
-        manager.onPublicPacketSeen(freshMessage)
-
-        let announcePacket = BitchatPacket(
-            type: MessageType.announce.rawValue,
-            senderID: senderData,
-            recipientID: nil,
-            timestamp: staleTimestampMs,
-            payload: Data(),
-            signature: nil,
-            ttl: 1
-        )
-
-        manager.onPublicPacketSeen(announcePacket)
-
-        manager._performMaintenanceSynchronously()
-
-        #expect(manager._hasAnnouncement(for: PeerID(str: peerHex)) == false)
-        #expect(manager._messageCount(for: PeerID(str: peerHex)) == 0)
     }
 }
 

bitchatTests/Integration/IntegrationTests.swift

@@ -6,31 +6,52 @@
 // For more information, see <https://unlicense.org>
 //
 
-import Foundation
+import XCTest
 import CryptoKit
-import Testing
 @testable import bitchat
 
-struct IntegrationTests {
+final class IntegrationTests: XCTestCase {
     
-    private var helper = TestNetworkHelper()
+    var nodes: [String: MockBluetoothMeshService] = [:]
+    var noiseManagers: [String: NoiseSessionManager] = [:]
+    private var mockKeychain: MockKeychain!
     
-    init() {
+    override func setUp() {
-        helper.createNode("Alice", peerID: PeerID(str: UUID().uuidString))
+        super.setUp()
-        helper.createNode("Bob", peerID: PeerID(str: UUID().uuidString))
+        // Use the in-memory test bus with autoFlood enabled to simulate
-        helper.createNode("Charlie", peerID: PeerID(str: UUID().uuidString))
+        // broadcast propagation across a larger mesh. Integration-only.
-        helper.createNode("David", peerID: PeerID(str: UUID().uuidString))
+        MockBLEService.resetTestBus()
+        MockBLEService.autoFloodEnabled = true
+        mockKeychain = MockKeychain()
+        
+        // Create a network of nodes
+        createNode("Alice", peerID: TestConstants.testPeerID1)
+        createNode("Bob", peerID: TestConstants.testPeerID2)
+        createNode("Charlie", peerID: TestConstants.testPeerID3)
+        createNode("David", peerID: TestConstants.testPeerID4)
+    }
+    
+    override func tearDown() {
+        // Disable flooding to avoid cross-test interference
+        MockBLEService.autoFloodEnabled = false
+        nodes.removeAll()
+        noiseManagers.removeAll()
+        mockKeychain = nil
+        super.tearDown()
     }
     
     // MARK: - Multi-Peer Scenarios
     
-    @Test func fullMeshCommunication() async throws {
+    func testFullMeshCommunication() {
-        helper.connectFullMesh()
+        // Create full mesh - everyone connected to everyone
+        connectFullMesh()
         
+        let expectation = XCTestExpectation(description: "All nodes communicate")
         var messageMatrix: [String: Set<String>] = [:]
-        for (senderName, _) in helper.nodes { messageMatrix[senderName] = [] }
         
-        for (receiverName, receiver) in helper.nodes {
+        // Track all receivers; parse sender name from message content "Hello from <Name>"
+        for (senderName, _) in nodes { messageMatrix[senderName] = [] }
+        for (receiverName, receiver) in nodes {
             receiver.messageDeliveryHandler = { message in
                 let parts = message.content.components(separatedBy: " ")
                 if let last = parts.last, message.content.contains("Hello from") {
@@ -41,336 +62,370 @@ struct IntegrationTests {
             }
         }
         
-        for (name, node) in helper.nodes {
+        // Each node sends a message
-            node.sendMessage("Hello from \(name)")
+        for (name, node) in nodes {
+            node.sendMessage("Hello from \(name)", mentions: [], to: nil)
         }
         
-        // Each sender should have reached all other nodes
+        // Wait and verify
-        for (sender, receivers) in messageMatrix {
+        DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
-            let expectedReceivers = Set(helper.nodes.keys.filter { $0 != sender })
+            // Each sender should have reached all other nodes
-            #expect(receivers == expectedReceivers, "\(sender) didn't reach all nodes")
+            for (sender, receivers) in messageMatrix {
-        }
+                let expectedReceivers = Set(self.nodes.keys.filter { $0 != sender })
-    }
+                XCTAssertEqual(receivers, expectedReceivers, "\(sender) didn't reach all nodes")
-    
-    @Test func dynamicTopologyChanges() async throws {
-        // Start with Alice -> Bob -> Charlie
-        helper.connect("Alice", "Bob")
-        helper.connect("Bob", "Charlie")
-        
-        try await confirmation("Topology changes handled") { receiveMessage in
-            var phase = 1
-            
-            helper.nodes["Charlie"]!.messageDeliveryHandler = { message in
-                if phase == 1 && message.sender == "Alice" {
-                    // Now change topology: disconnect Bob, connect Alice-Charlie
-                    helper.disconnect("Alice", "Bob")
-                    helper.disconnect("Bob", "Charlie")
-                    helper.connect("Alice", "Charlie")
-                    phase = 2
-                    
-                    // Send another message
-                    helper.nodes["Alice"]!.sendMessage("Direct message")
-                } else if phase == 2 && message.content == "Direct message" {
-                    receiveMessage()
-                }
             }
-            
+            expectation.fulfill()
-            // Allow relay handler to be set before first send
-            try await sleep(0.05)
-            helper.nodes["Alice"]!.sendMessage("Relayed message")
         }
+        
+        wait(for: [expectation], timeout: TestConstants.defaultTimeout)
     }
     
-    @Test func networkPartitionRecovery() async throws {
+    func testDynamicTopologyChanges() {
-        // Create two partitions
+        // Start with Alice -> Bob -> Charlie
-        helper.connect("Alice", "Bob")
+        connect("Alice", "Bob")
-        helper.connect("Charlie", "David")
+        connect("Bob", "Charlie")
         
+        let expectation = XCTestExpectation(description: "Topology changes handled")
+        var phase = 1
+        
+        // Phase 1: Test initial topology
+        nodes["Charlie"]!.messageDeliveryHandler = { message in
+            if phase == 1 && message.sender == "Alice" {
+                // Now change topology: disconnect Bob, connect Alice-Charlie
+                self.disconnect("Alice", "Bob")
+                self.disconnect("Bob", "Charlie")
+                self.connect("Alice", "Charlie")
+                phase = 2
+                
+                // Send another message
+                self.nodes["Alice"]!.sendMessage("Direct message", mentions: [], to: nil)
+            } else if phase == 2 && message.content == "Direct message" {
+                expectation.fulfill()
+            }
+        }
+        
+        // Initial message through relay
+        // Allow relay handler to be set before first send
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.05) {
+            self.nodes["Alice"]!.sendMessage("Relayed message", mentions: [], to: nil)
+        }
+        
+        wait(for: [expectation], timeout: TestConstants.defaultTimeout)
+    }
+    
+    func testNetworkPartitionRecovery() {
+        // Create two partitions
+        connect("Alice", "Bob")
+        connect("Charlie", "David")
+        
+        let expectation = XCTestExpectation(description: "Partitions merge and communicate")
         let messagesBeforeMerge = 0
         var messagesAfterMerge = 0
         
-        try await confirmation("Partitions merge and communicate") { receiveMessage in
+        // Monitor cross-partition messages
-            // Monitor cross-partition messages
+        nodes["David"]!.messageDeliveryHandler = { message in
-            helper.nodes["David"]!.messageDeliveryHandler = { message in
+            if message.sender == "Alice" {
-                if message.sender == "Alice" {
+                messagesAfterMerge += 1
-                    messagesAfterMerge += 1
+                if messagesAfterMerge == 1 {
-                    if messagesAfterMerge == 1 {
+                    expectation.fulfill()
-                        receiveMessage()
-                    }
                 }
             }
-            
-            // Try to send across partition (should fail)
-            helper.nodes["Alice"]!.sendMessage("Before merge")
-            
-            // Merge partitions after delay
-            try await sleep(0.05)
-            // Connect partitions
-            helper.connect("Bob", "Charlie")
-            
-            // Enable relay
-            helper.setupRelay("Bob", nextHops: ["Charlie"])
-            helper.setupRelay("Charlie", nextHops: ["David"])
-            
-            // Send message across merged network
-            helper.nodes["Alice"]!.sendMessage("After merge")
         }
         
-        #expect(messagesBeforeMerge == 0)
+        // Try to send across partition (should fail)
-        #expect(messagesAfterMerge == 1)
+        nodes["Alice"]!.sendMessage("Before merge", mentions: [], to: nil)
+        
+        // Merge partitions after delay
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+            // Connect partitions
+            self.connect("Bob", "Charlie")
+            
+            // Enable relay
+            self.setupRelay("Bob", nextHops: ["Charlie"])
+            self.setupRelay("Charlie", nextHops: ["David"])
+            
+            // Send message across merged network
+            self.nodes["Alice"]!.sendMessage("After merge", mentions: [], to: nil)
+        }
+        
+        wait(for: [expectation], timeout: TestConstants.defaultTimeout)
+        XCTAssertEqual(messagesBeforeMerge, 0)
+        XCTAssertEqual(messagesAfterMerge, 1)
     }
     
     // MARK: - Mixed Message Type Scenarios
     
-    @Test func mixedPublicPrivateMessages() async throws {
+    func testMixedPublicPrivateMessages() throws {
-        helper.connectFullMesh()
+        connectFullMesh()
         
+        let expectation = XCTestExpectation(description: "Mixed messages handled correctly")
         var publicCount = 0
         var privateCount = 0
         
-        await confirmation("Mixed messages handled correctly") { completion in
+        // Bob monitors messages
-            // Bob monitors messages
+        nodes["Bob"]!.messageDeliveryHandler = { message in
-            helper.nodes["Bob"]!.messageDeliveryHandler = { message in
+            if message.isPrivate && message.recipientNickname == "Bob" {
-                if message.isPrivate && message.recipientNickname == "Bob" {
+                privateCount += 1
-                    privateCount += 1
+            } else if !message.isPrivate {
-                } else if !message.isPrivate {
+                publicCount += 1
-                    publicCount += 1
-                }
-                
-                if publicCount == 2 && privateCount == 1 {
-                    completion()
-                }
             }
             
-            // Alice sends mixed messages
+            if publicCount == 2 && privateCount == 1 {
-            helper.nodes["Alice"]!.sendMessage("Public 1")
+                expectation.fulfill()
-            helper.nodes["Alice"]!.sendPrivateMessage("Private to Bob", to: helper.nodes["Bob"]!.peerID, recipientNickname: "Bob")
+            }
-            helper.nodes["Alice"]!.sendMessage("Public 2")
         }
         
-        #expect(publicCount == 2)
+        // Alice sends mixed messages
-        #expect(privateCount == 1)
+        nodes["Alice"]!.sendMessage("Public 1", mentions: [], to: nil)
+        nodes["Alice"]!.sendPrivateMessage("Private to Bob", to: TestConstants.testPeerID2, recipientNickname: "Bob")
+        nodes["Alice"]!.sendMessage("Public 2", mentions: [], to: nil)
+        
+        wait(for: [expectation], timeout: TestConstants.defaultTimeout)
+        XCTAssertEqual(publicCount, 2)
+        XCTAssertEqual(privateCount, 1)
     }
     
-    @Test func encryptedAndUnencryptedMix() async throws {
+    func testEncryptedAndUnencryptedMix() throws {
-        helper.connect("Alice", "Bob")
+        connect("Alice", "Bob")
         
         // Setup Noise session
-        try helper.establishNoiseSession("Alice", "Bob")
+        try establishNoiseSession("Alice", "Bob")
         
+        let expectation = XCTestExpectation(description: "Both encrypted and plain messages work")
         var plainCount = 0
         var encryptedCount = 0
         
-        try await confirmation("Both encrypted and plain messages work") { completion in
+        // Setup handlers
-            // Plain path: send public message and count at Bob
+        // Plain path: send public message and count at Bob
-            helper.nodes["Bob"]!.messageDeliveryHandler = { message in
+        nodes["Bob"]!.messageDeliveryHandler = { message in
-                if message.content == "Plain message" {
+            if message.content == "Plain message" { plainCount += 1 }
-                    plainCount += 1
+            if plainCount == 1 && encryptedCount == 1 { expectation.fulfill() }
-                }
-                if plainCount == 1 && encryptedCount == 1 {
-                    completion()
-                }
-            }
-            
-            // Encrypted path: use NoiseSessionManager explicitly
-            let plaintext = "Encrypted message".data(using: .utf8)!
-            let ciphertext = try helper.noiseManagers["Alice"]!.encrypt(plaintext, for: helper.nodes["Bob"]!.peerID)
-            
-            helper.nodes["Bob"]!.packetDeliveryHandler = { packet in
-                if packet.type == MessageType.noiseEncrypted.rawValue {
-                    if let data = try? helper.noiseManagers["Bob"]!.decrypt(ciphertext, from: helper.nodes["Alice"]!.peerID),
-                       data == plaintext {
-                        encryptedCount = 1
-                        if plainCount == 1 {
-                            completion()
-                        }
-                    }
-                }
-            }
-            
-            helper.nodes["Alice"]!.sendMessage("Plain message")
-            // Deliver encrypted packet directly
-            let encPacket = TestHelpers.createTestPacket(type: MessageType.noiseEncrypted.rawValue, payload: ciphertext)
-            helper.nodes["Bob"]!.simulateIncomingPacket(encPacket)
         }
+
+        // Encrypted path: use NoiseSessionManager explicitly
+        let plaintext = "Encrypted message".data(using: .utf8)!
+        let ciphertext = try noiseManagers["Alice"]!.encrypt(plaintext, for: TestConstants.testPeerID2)
+        nodes["Bob"]!.packetDeliveryHandler = { packet in
+            if packet.type == MessageType.noiseEncrypted.rawValue {
+                if let data = try? self.noiseManagers["Bob"]!.decrypt(ciphertext, from: TestConstants.testPeerID1),
+                   data == plaintext {
+                    encryptedCount = 1
+                    if plainCount == 1 { expectation.fulfill() }
+                }
+            }
+        }
+
+        nodes["Alice"]!.sendMessage("Plain message", mentions: [], to: nil)
+        // Deliver encrypted packet directly
+        let encPacket = TestHelpers.createTestPacket(type: MessageType.noiseEncrypted.rawValue, payload: ciphertext)
+        nodes["Bob"]!.simulateIncomingPacket(encPacket)
+        
+        wait(for: [expectation], timeout: TestConstants.defaultTimeout)
     }
     
     // MARK: - Network Resilience Tests
     
-    @Test func messageDeliveryUnderChurn() async throws {
+    func testMessageDeliveryUnderChurn() {
         // Start with stable network
-        helper.connectFullMesh()
+        connectFullMesh()
         
+        let expectation = XCTestExpectation(description: "Messages delivered despite churn")
+        var receivedMessages = Set<String>()
         let totalMessages = 10
         
-        try await confirmation("Messages delivered despite churn", expectedCount: totalMessages) { completion in
+        // David tracks received messages
-            // David tracks received messages
+        nodes["David"]!.messageDeliveryHandler = { message in
-            helper.nodes["David"]!.messageDeliveryHandler = { message in
+            receivedMessages.insert(message.content)
-                completion()
+            if receivedMessages.count == totalMessages {
-            }
+                expectation.fulfill()
-            
-            // Send messages while churning network
-            for i in 0..<totalMessages {
-                helper.nodes["Alice"]!.sendMessage("Message \(i)")
-                
-                // Simulate churn
-                if i % 3 == 0 {
-                    // Disconnect and reconnect random connection
-                    let pairs = [("Alice", "Bob"), ("Bob", "Charlie"), ("Charlie", "David")]
-                    let randomPair = pairs.randomElement()!
-                    helper.disconnect(randomPair.0, randomPair.1)
-                    try await sleep(0.01)
-                    helper.connect(randomPair.0, randomPair.1)
-                }
             }
         }
-    }
-    
-    @Test func peerPresenceTrackingAndReconnection() async throws {
-        helper.connect("Alice", "Bob")
         
-        await confirmation("Delivery after reconnection") { delivered in
+        // Send messages while churning network
-            helper.nodes["Bob"]!.messageDeliveryHandler = { message in
+        for i in 0..<totalMessages {
-                if message.content == "After reconnect" {
+            nodes["Alice"]!.sendMessage("Message \(i)", mentions: [], to: nil)
-                    delivered()
+            
+            // Simulate churn
+            if i % 3 == 0 {
+                // Disconnect and reconnect random connection
+                let pairs = [("Alice", "Bob"), ("Bob", "Charlie"), ("Charlie", "David")]
+                let randomPair = pairs.randomElement()!
+                disconnect(randomPair.0, randomPair.1)
+                
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
+                    self.connect(randomPair.0, randomPair.1)
                 }
             }
-            
-            // Simulate disconnect (out of range)
-            helper.disconnect("Alice", "Bob")
-            // Reconnect
-            helper.connect("Alice", "Bob")
-            
-            // Send after reconnection
-            helper.nodes["Alice"]!.sendMessage("After reconnect")
         }
+        
+        wait(for: [expectation], timeout: TestConstants.longTimeout)
+        XCTAssertEqual(receivedMessages.count, totalMessages)
     }
     
-    @Test func encryptedMessageAfterPeerRestart() async throws {
+    func testPeerPresenceTrackingAndReconnection() {
-        helper.connect("Alice", "Bob")
+        // Test that after disconnect/reconnect, message delivery resumes
+        connect("Alice", "Bob")
+
+        let expectation = XCTestExpectation(description: "Delivery after reconnection")
+        var delivered = false
+
+        nodes["Bob"]!.messageDeliveryHandler = { message in
+            if message.content == "After reconnect" && !delivered {
+                delivered = true
+                expectation.fulfill()
+            }
+        }
+
+        // Simulate disconnect (out of range)
+        disconnect("Alice", "Bob")
+        // Reconnect
+        connect("Alice", "Bob")
+
+        // Send after reconnection
+        nodes["Alice"]!.sendMessage("After reconnect", mentions: [], to: nil)
+
+        wait(for: [expectation], timeout: TestConstants.defaultTimeout)
+        XCTAssertTrue(delivered)
+    }
+    
+    func testEncryptedMessageAfterPeerRestart() {
+        // Test that encrypted messages work after one peer restarts
+        connect("Alice", "Bob")
         do {
-            try helper.establishNoiseSession("Alice", "Bob")
+            try establishNoiseSession("Alice", "Bob")
         } catch {
-            Issue.record("Failed to establish Noise session: \(error)")
+            XCTFail("Failed to establish Noise session: \(error)")
         }
         
         // Exchange an encrypted message
-        await confirmation("First message received") { received in
+        let firstExpectation = XCTestExpectation(description: "First message received")
-            helper.nodes["Bob"]!.messageDeliveryHandler = { message in
+        nodes["Bob"]!.messageDeliveryHandler = { message in
-                if message.content == "Before restart" && message.isPrivate {
+            if message.content == "Before restart" && message.isPrivate {
-                    received()
+                firstExpectation.fulfill()
-                }
             }
-            helper.nodes["Alice"]!.sendPrivateMessage("Before restart", to: helper.nodes["Bob"]!.peerID, recipientNickname: "Bob")
         }
         
+        nodes["Alice"]!.sendPrivateMessage("Before restart", to: TestConstants.testPeerID2, recipientNickname: "Bob")
+        wait(for: [firstExpectation], timeout: TestConstants.defaultTimeout)
+        
         // Simulate Bob restart by recreating his Noise manager
         let bobKey = Curve25519.KeyAgreement.PrivateKey()
-        helper.noiseManagers["Bob"] = NoiseSessionManager(localStaticKey: bobKey, keychain: helper.mockKeychain)
+        noiseManagers["Bob"] = NoiseSessionManager(localStaticKey: bobKey, keychain: mockKeychain)
         
         // Re-establish Noise handshake explicitly via managers
         do {
-            let m1 = try helper.noiseManagers["Bob"]!.initiateHandshake(with: helper.nodes["Alice"]!.peerID)
+            let m1 = try noiseManagers["Bob"]!.initiateHandshake(with: TestConstants.testPeerID1)
-            let m2 = try helper.noiseManagers["Alice"]!.handleIncomingHandshake(from: helper.nodes["Bob"]!.peerID, message: m1)!
+            let m2 = try noiseManagers["Alice"]!.handleIncomingHandshake(from: TestConstants.testPeerID2, message: m1)!
-            let m3 = try helper.noiseManagers["Bob"]!.handleIncomingHandshake(from: helper.nodes["Alice"]!.peerID, message: m2)!
+            let m3 = try noiseManagers["Bob"]!.handleIncomingHandshake(from: TestConstants.testPeerID1, message: m2)!
-            _ = try helper.noiseManagers["Alice"]!.handleIncomingHandshake(from: helper.nodes["Bob"]!.peerID, message: m3)
+            _ = try noiseManagers["Alice"]!.handleIncomingHandshake(from: TestConstants.testPeerID2, message: m3)
         } catch {
-            Issue.record("Failed to re-establish Noise session after restart: \(error)")
+            XCTFail("Failed to re-establish Noise session after restart: \(error)")
         }
         
-        // Now messages should work again - simulate encrypted packet
+        // Now messages should work again
-        await confirmation("Message after restart received") { received in
+        let secondExpectation = XCTestExpectation(description: "Message after restart received")
-            helper.nodes["Alice"]!.messageDeliveryHandler = { message in
+        nodes["Alice"]!.messageDeliveryHandler = { message in
-                if message.content == "After restart success" && message.isPrivate {
+            if message.content == "After restart success" && message.isPrivate {
-                    received()
+                secondExpectation.fulfill()
-                }
-            }
-            
-            do {
-                let plaintext = "After restart success".data(using: .utf8)!
-                let ciphertext = try helper.noiseManagers["Bob"]!.encrypt(plaintext, for: helper.nodes["Alice"]!.peerID)
-                let packet = TestHelpers.createTestPacket(type: MessageType.noiseEncrypted.rawValue, payload: ciphertext)
-                helper.nodes["Alice"]!.packetDeliveryHandler = { pkt in
-                    if pkt.type == MessageType.noiseEncrypted.rawValue {
-                        if let data = try? helper.noiseManagers["Alice"]!.decrypt(pkt.payload, from: helper.nodes["Bob"]!.peerID),
-                           String(data: data, encoding: .utf8) == "After restart success" {
-                            received()
-                        }
-                    }
-                }
-                helper.nodes["Alice"]!.simulateIncomingPacket(packet)
-            } catch {
-                Issue.record("Encryption after restart failed: \(error)")
             }
         }
+        
+        // Simulate encrypted message using managers
+        do {
+            let plaintext = "After restart success".data(using: .utf8)!
+            let ciphertext = try noiseManagers["Bob"]!.encrypt(plaintext, for: TestConstants.testPeerID1)
+            let packet = TestHelpers.createTestPacket(type: MessageType.noiseEncrypted.rawValue, payload: ciphertext)
+            nodes["Alice"]!.packetDeliveryHandler = { pkt in
+                if pkt.type == MessageType.noiseEncrypted.rawValue {
+                    if let data = try? self.noiseManagers["Alice"]!.decrypt(pkt.payload, from: TestConstants.testPeerID2),
+                       String(data: data, encoding: .utf8) == "After restart success" {
+                        secondExpectation.fulfill()
+                    }
+                }
+            }
+            nodes["Alice"]!.simulateIncomingPacket(packet)
+        } catch {
+            XCTFail("Encryption after restart failed: \(error)")
+        }
+        wait(for: [secondExpectation], timeout: TestConstants.defaultTimeout)
     }
     
-    @Test func largeScaleNetwork() async throws {
+    func testLargeScaleNetwork() {
         // Create larger network
         for i in 5...10 {
-            helper.createNode("Node\(i)", peerID: PeerID(str: "PEER\(i)"))
+            createNode("Node\(i)", peerID: "PEER\(i)")
         }
         
         // Connect in ring topology with cross-connections
-        let allNodes = Array(helper.nodes.keys).sorted()
+        let allNodes = Array(nodes.keys).sorted()
         for i in 0..<allNodes.count {
             // Ring connection
-            helper.connect(allNodes[i], allNodes[(i + 1) % allNodes.count])
+            connect(allNodes[i], allNodes[(i + 1) % allNodes.count])
             
             // Cross connection
             if i + 3 < allNodes.count {
-                helper.connect(allNodes[i], allNodes[i + 3])
+                connect(allNodes[i], allNodes[i + 3])
             }
         }
         
-        await confirmation("Large network handles broadcast", expectedCount: helper.nodes.count - 1) { nodeReaced in
+        let expectation = XCTestExpectation(description: "Large network handles broadcast")
-            // All nodes except Alice listen
+        var nodesReached = Set<String>()
-            for (name, node) in helper.nodes where name != "Alice" {
+        
-                node.messageDeliveryHandler = { message in
+        // All nodes except Alice listen
-                    if message.content == "Broadcast test" {
+        for (name, node) in nodes where name != "Alice" {
-                        nodeReaced()
+            node.messageDeliveryHandler = { message in
+                if message.content == "Broadcast test" {
+                    nodesReached.insert(name)
+                    if nodesReached.count == self.nodes.count - 1 {
+                        expectation.fulfill()
                     }
                 }
             }
-            
-            // Alice broadcasts
-            helper.nodes["Alice"]!.sendMessage("Broadcast test")
         }
+        
+        // Alice broadcasts
+        nodes["Alice"]!.sendMessage("Broadcast test", mentions: [], to: nil)
+        
+        wait(for: [expectation], timeout: TestConstants.longTimeout)
+        XCTAssertEqual(nodesReached.count, nodes.count - 1)
     }
     
     // MARK: - Stress Tests
     
-    @Test func highLoadScenario() async throws {
+    func testHighLoadScenario() {
-        helper.connectFullMesh()
+        connectFullMesh()
         
         let messagesPerNode = 25
-        let expectedTotal = messagesPerNode * helper.nodes.count * (helper.nodes.count - 1)
+        let expectedTotal = messagesPerNode * nodes.count * (nodes.count - 1)
+        var receivedTotal = 0
+        let expectation = XCTestExpectation(description: "High load handled")
         
-        await confirmation("High load handled", expectedCount: expectedTotal) { received in
+        // Each node tracks messages
-            // Each node tracks messages
+        for (_, node) in nodes {
-            for (_, node) in helper.nodes {
+            node.messageDeliveryHandler = { _ in
-                node.messageDeliveryHandler = { _ in
+                receivedTotal += 1
-                    received()
+                if receivedTotal >= (expectedTotal - 2) {
+                    expectation.fulfill()
                 }
             }
-            
-            // All nodes send many messages simultaneously
-            await withTaskGroup(of: Void.self) { group in
-                for (name, node) in helper.nodes {
-                    group.addTask {
-                        for i in 0..<messagesPerNode {
-                            node.sendMessage("\(name) message \(i)")
-                        }
-                    }
-                }
-                await group.waitForAll()
-            }
         }
+        
+        // All nodes send many messages simultaneously
+        DispatchQueue.concurrentPerform(iterations: nodes.count) { index in
+            let nodeName = Array(nodes.keys).sorted()[index]
+            for i in 0..<messagesPerNode {
+                nodes[nodeName]!.sendMessage("\(nodeName) message \(i)", mentions: [], to: nil)
+            }
+        }
+        
+        wait(for: [expectation], timeout: TestConstants.longTimeout)
+        XCTAssertGreaterThanOrEqual(receivedTotal, expectedTotal - 2)
     }
     
-    @Test func mixedTrafficPatterns() async throws {
+    func testMixedTrafficPatterns() {
-        helper.connectFullMesh()
+        connectFullMesh()
         
+        let expectation = XCTestExpectation(description: "Mixed traffic handled")
         var metrics = [
             "public": 0,
             "private": 0,
@@ -379,7 +434,7 @@ struct IntegrationTests {
         ]
         
         // Setup complex handlers
-        for (name, node) in helper.nodes {
+        for (name, node) in nodes {
             node.messageDeliveryHandler = { message in
                 if message.isPrivate {
                     metrics["private"]! += 1
@@ -398,119 +453,222 @@ struct IntegrationTests {
         }
         
         // Generate mixed traffic
-        helper.nodes["Alice"]!.sendMessage("Public broadcast")
+        nodes["Alice"]!.sendMessage("Public broadcast", mentions: [], to: nil)
-        helper.nodes["Alice"]!.sendPrivateMessage("Private to Bob", to: helper.nodes["Bob"]!.peerID, recipientNickname: "Bob")
+        nodes["Alice"]!.sendPrivateMessage("Private to Bob", to: TestConstants.testPeerID2, recipientNickname: "Bob")
-        helper.nodes["Bob"]!.sendMessage("Mentioning @Charlie", mentions: ["Charlie"])
+        nodes["Bob"]!.sendMessage("Mentioning @Charlie", mentions: ["Charlie"], to: nil)
         
         // Disconnect to force relay
-        helper.disconnect("Alice", "David")
+        disconnect("Alice", "David")
-        helper.nodes["Alice"]!.sendMessage("Needs relay to David")
+        nodes["Alice"]!.sendMessage("Needs relay to David", mentions: [], to: nil)
         
-        #expect(metrics["public", default: 0] > 0)
+        DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
-        #expect(metrics["private", default: 0] > 0)
+            XCTAssertGreaterThan(metrics["public"]!, 0)
-        #expect(metrics["mentions", default: 0] > 0)
+            XCTAssertGreaterThan(metrics["private"]!, 0)
+            XCTAssertGreaterThan(metrics["mentions"]!, 0)
+            expectation.fulfill()
+        }
+        
+        wait(for: [expectation], timeout: TestConstants.defaultTimeout)
     }
     
     // MARK: - Security Integration Tests
     // Replacement for the legacy NACK test: verifies that after a
     // decryption failure, peers can rehandshake via NoiseSessionManager
     // and resume secure communication.
-    @Test func rehandshakeAfterDecryptionFailure() throws {
+    func testRehandshakeAfterDecryptionFailure() throws {
         // Alice <-> Bob connected
-        helper.connect("Alice", "Bob")
+        connect("Alice", "Bob")
-        
+
         // Establish initial Noise session
-        try helper.establishNoiseSession("Alice", "Bob")
+        try establishNoiseSession("Alice", "Bob")
-        
+
-        guard let aliceManager = helper.noiseManagers["Alice"],
+        guard let aliceManager = noiseManagers["Alice"],
-              let bobManager = helper.noiseManagers["Bob"],
+              let bobManager = noiseManagers["Bob"],
-              let alicePeerID = helper.nodes["Alice"]?.peerID,
+              let alicePeerID = nodes["Alice"]?.peerID,
-              let bobPeerID = helper.nodes["Bob"]?.peerID
+              let bobPeerID = nodes["Bob"]?.peerID else {
-        else {
+            return XCTFail("Missing managers or peer IDs")
-            Issue.record("Missing managers or peer IDs")
-            return
         }
-        
+
         // Baseline: encrypt from Alice, decrypt at Bob
         let plaintext1 = Data("hello-secure".utf8)
         let encrypted1 = try aliceManager.encrypt(plaintext1, for: bobPeerID)
         let decrypted1 = try bobManager.decrypt(encrypted1, from: alicePeerID)
-        #expect(decrypted1 == plaintext1)
+        XCTAssertEqual(decrypted1, plaintext1)
-        
+
         // Simulate decryption failure by corrupting ciphertext
-        let corrupted = encrypted1.prefix(15)
+        var corrupted = encrypted1
-        #expect(throws: NoiseError.invalidCiphertext) {
+        if !corrupted.isEmpty { corrupted[corrupted.count - 1] ^= 0xFF }
+        do {
             _ = try bobManager.decrypt(corrupted, from: alicePeerID)
+            XCTFail("Corrupted ciphertext should not decrypt")
+        } catch {
+            // Expected: treat as session desync and rehandshake
         }
-        
+
         // Bob initiates a new handshake; clear Bob's session first so initiateHandshake won't throw
         bobManager.removeSession(for: alicePeerID)
-        try helper.establishNoiseSession("Bob", "Alice")
+        try establishNoiseSession("Bob", "Alice")
-        
+
         // After rehandshake, encryption/decryption works again
         let plaintext2 = Data("hello-again".utf8)
         let encrypted2 = try aliceManager.encrypt(plaintext2, for: bobPeerID)
         let decrypted2 = try bobManager.decrypt(encrypted2, from: alicePeerID)
-        #expect(decrypted2 == plaintext2)
+        XCTAssertEqual(decrypted2, plaintext2)
     }
+
     
-    @Test func endToEndSecurityScenario() async throws {
+    func testEndToEndSecurityScenario() throws {
-        helper.connect("Alice", "Bob")
+        connect("Alice", "Bob")
-        helper.connect("Bob", "Charlie") // Charlie will try to eavesdrop
+        connect("Bob", "Charlie") // Charlie will try to eavesdrop
         
         // Establish secure session between Alice and Bob only
-        try helper.establishNoiseSession("Alice", "Bob")
+        try establishNoiseSession("Alice", "Bob")
         
-        await confirmation("Secure communication maintained", expectedCount: 2) { receivedPacket in
+        let expectation = XCTestExpectation(description: "Secure communication maintained")
-            
+        var bobDecrypted = false
-            // Setup encryption at Alice
+        var charlieIntercepted = false
-            helper.nodes["Alice"]!.packetDeliveryHandler = { packet in
+        
-                if packet.type == 0x01,
+        // Setup encryption at Alice
-                   let message = BitchatMessage(packet.payload),
+        nodes["Alice"]!.packetDeliveryHandler = { packet in
-                   message.isPrivate && packet.recipientID != nil {
+            if packet.type == 0x01,
-                    // Encrypt private messages
+               let message = BitchatMessage(packet.payload),
-                    if let encrypted = try? helper.noiseManagers["Alice"]!.encrypt(packet.payload, for: helper.nodes["Bob"]!.peerID) {
+               message.isPrivate && packet.recipientID != nil {
-                        let encPacket = BitchatPacket(
+                // Encrypt private messages
-                            type: 0x02,
+                if let encrypted = try? self.noiseManagers["Alice"]!.encrypt(packet.payload, for: TestConstants.testPeerID2) {
-                            senderID: packet.senderID,
+                    let encPacket = BitchatPacket(
-                            recipientID: packet.recipientID,
+                        type: 0x02,
-                            timestamp: packet.timestamp,
+                        senderID: packet.senderID,
-                            payload: encrypted,
+                        recipientID: packet.recipientID,
-                            signature: packet.signature,
+                        timestamp: packet.timestamp,
-                            ttl: packet.ttl
+                        payload: encrypted,
-                        )
+                        signature: packet.signature,
-                        helper.nodes["Bob"]!.simulateIncomingPacket(encPacket)
+                        ttl: packet.ttl
-                    }
+                    )
+                    self.nodes["Bob"]!.simulateIncomingPacket(encPacket)
                 }
             }
-            
+        }
-            // Bob can decrypt
+        
-            helper.nodes["Bob"]!.packetDeliveryHandler = { packet in
+        // Bob can decrypt
-                if packet.type == 0x02 {
+        nodes["Bob"]!.packetDeliveryHandler = { packet in
-                    receivedPacket()
+            if packet.type == 0x02 {
-                    if let decrypted = try? helper.noiseManagers["Bob"]!.decrypt(packet.payload, from: helper.nodes["Alice"]!.peerID) {
+                if let decrypted = try? self.noiseManagers["Bob"]!.decrypt(packet.payload, from: TestConstants.testPeerID1),
-                        #expect(BitchatMessage(decrypted)?.content == "Secret message")
+                   let message = BitchatMessage(decrypted) {
-                    } else {
+                    bobDecrypted = message.content == "Secret message"
-                        Issue.record("Bob was unable to decrypt the message")
+                    expectation.fulfill()
-                    }
+                }
-                    
+                
-                    // Relay encrypted packet to Charlie
+                // Relay encrypted packet to Charlie
-                    helper.nodes["Charlie"]!.simulateIncomingPacket(packet)
+                self.nodes["Charlie"]!.simulateIncomingPacket(packet)
+            }
+        }
+        
+        // Charlie cannot decrypt
+        nodes["Charlie"]!.packetDeliveryHandler = { packet in
+            if packet.type == 0x02 {
+                charlieIntercepted = true
+                // Try to decrypt (should fail)
+                do {
+                    _ = try self.noiseManagers["Charlie"]?.decrypt(packet.payload, from: TestConstants.testPeerID1)
+                    XCTFail("Charlie should not be able to decrypt")
+                } catch {
+                    // Expected
                 }
             }
-            
+        }
-            // Charlie cannot decrypt
+        
-            helper.nodes["Charlie"]!.packetDeliveryHandler = { packet in
+        // Send encrypted private message
-                if packet.type == 0x02 {
+        nodes["Alice"]!.sendPrivateMessage("Secret message", to: TestConstants.testPeerID2, recipientNickname: "Bob")
-                    receivedPacket()
+        
-                    #expect(throws: NoiseSessionError.sessionNotFound, "Charlie should not be able to decrypt") {
+        wait(for: [expectation], timeout: TestConstants.defaultTimeout)
-                        _ = try helper.noiseManagers["Charlie"]?.decrypt(packet.payload, from: helper.nodes["Alice"]!.peerID)
+        XCTAssertTrue(bobDecrypted)
-                    }
+        XCTAssertTrue(charlieIntercepted)
-                }
+    }
+    
+    // MARK: - Helper Methods
+    
+    private func createNode(_ name: String, peerID: PeerID) {
+        let node = MockBluetoothMeshService()
+        node.myPeerID = peerID
+        node.mockNickname = name
+        nodes[name] = node
+        
+        // Create Noise manager
+        let key = Curve25519.KeyAgreement.PrivateKey()
+        noiseManagers[name] = NoiseSessionManager(localStaticKey: key, keychain: mockKeychain)
+    }
+    
+    private func connect(_ node1: String, _ node2: String) {
+        guard let n1 = nodes[node1], let n2 = nodes[node2] else { return }
+        n1.simulateConnectedPeer(n2.peerID)
+        n2.simulateConnectedPeer(n1.peerID)
+    }
+    
+    private func disconnect(_ node1: String, _ node2: String) {
+        guard let n1 = nodes[node1], let n2 = nodes[node2] else { return }
+        n1.simulateDisconnectedPeer(n2.peerID)
+        n2.simulateDisconnectedPeer(n1.peerID)
+    }
+    
+    private func connectFullMesh() {
+        let nodeNames = Array(nodes.keys)
+        for i in 0..<nodeNames.count {
+            for j in i+1..<nodeNames.count {
+                connect(nodeNames[i], nodeNames[j])
             }
-            
-            // Send encrypted private message
-            helper.nodes["Alice"]!.sendPrivateMessage("Secret message", to: helper.nodes["Bob"]!.peerID, recipientNickname: "Bob")
         }
     }
+    
+    private func setupRelay(_ nodeName: String, nextHops: [String]) {
+        guard let node = nodes[nodeName] else { return }
+        
+        node.packetDeliveryHandler = { packet in
+            guard packet.ttl > 1 else { return }
+            
+            if let message = BitchatMessage(packet.payload) {
+                guard message.senderPeerID != node.peerID else { return }
+                
+                let relayMessage = BitchatMessage(
+                    id: message.id,
+                    sender: message.sender,
+                    content: message.content,
+                    timestamp: message.timestamp,
+                    isRelay: true,
+                    originalSender: message.isRelay ? message.originalSender : message.sender,
+                    isPrivate: message.isPrivate,
+                    recipientNickname: message.recipientNickname,
+                    senderPeerID: message.senderPeerID,
+                    mentions: message.mentions
+                )
+                
+                if let relayPayload = relayMessage.toBinaryPayload() {
+                    let relayPacket = BitchatPacket(
+                        type: packet.type,
+                        senderID: packet.senderID,
+                        recipientID: packet.recipientID,
+                        timestamp: packet.timestamp,
+                        payload: relayPayload,
+                        signature: packet.signature,
+                        ttl: packet.ttl - 1
+                    )
+                    
+                    for hop in nextHops {
+                        self.nodes[hop]?.simulateIncomingPacket(relayPacket)
+                    }
+                }
+            }
+        }
+    }
+    
+    private func establishNoiseSession(_ node1: String, _ node2: String) throws {
+        guard let manager1 = noiseManagers[node1],
+              let manager2 = noiseManagers[node2],
+              let peer1ID = nodes[node1]?.peerID,
+              let peer2ID = nodes[node2]?.peerID else { return }
+        
+        let msg1 = try manager1.initiateHandshake(with: peer2ID)
+        let msg2 = try manager2.handleIncomingHandshake(from: peer1ID, message: msg1)!
+        let msg3 = try manager1.handleIncomingHandshake(from: peer2ID, message: msg2)!
+        _ = try manager2.handleIncomingHandshake(from: peer1ID, message: msg3)
+    }
 }

bitchatTests/Integration/TestNetworkHelper.swift

@@ -1,123 +0,0 @@
-//
-// TestNetworkHelper.swift
-// bitchatTests
-//
-// Extracted shared, mutable integration state for nodes and noise sessions.
-// Keeps test containers nonmutating (Swift Testing-friendly).
-//
-
-import Foundation
-import CryptoKit
-@testable import bitchat
-
-final class TestNetworkHelper {
-    // Public, read-only views for tests; mutation only through methods
-    var nodes: [String: MockBLEService] = [:]
-    var noiseManagers: [String: NoiseSessionManager] = [:]
-    let mockKeychain = MockKeychain()
-    private let bus = MockBLEBus(autoFloodEnabled: true)
-    
-    // MARK: - Node/Manager management
-    
-    @discardableResult
-    func createNode(_ name: String, peerID: PeerID) -> MockBLEService {
-        let node = MockBLEService(bus: bus)
-        node.myPeerID = peerID
-        node.mockNickname = name
-        nodes[name] = node
-        
-        // Create/replace Noise manager for this node
-        let key = Curve25519.KeyAgreement.PrivateKey()
-        noiseManagers[name] = NoiseSessionManager(localStaticKey: key, keychain: mockKeychain)
-        return node
-    }
-    
-    func getNode(_ name: String) -> MockBLEService? {
-        nodes[name]
-    }
-    
-    func getManager(_ name: String) -> NoiseSessionManager? {
-        noiseManagers[name]
-    }
-    
-    // MARK: - Topology
-    
-    func connect(_ a: String, _ b: String) {
-        guard let n1 = nodes[a], let n2 = nodes[b] else { return }
-        n1.simulateConnectedPeer(n2.peerID)
-        n2.simulateConnectedPeer(n1.peerID)
-    }
-    
-    func disconnect(_ a: String, _ b: String) {
-        guard let n1 = nodes[a], let n2 = nodes[b] else { return }
-        n1.simulateDisconnectedPeer(n2.peerID)
-        n2.simulateDisconnectedPeer(n1.peerID)
-    }
-    
-    func connectFullMesh() {
-        let names = Array(nodes.keys)
-        for i in 0..<names.count {
-            for j in (i+1)..<names.count {
-                connect(names[i], names[j])
-            }
-        }
-    }
-    
-    // MARK: - Relay
-    
-    func setupRelay(_ nodeName: String, nextHops: [String]) {
-        guard let node = nodes[nodeName] else { return }
-        node.packetDeliveryHandler = { [weak self] packet in
-            guard let self else { return }
-            guard packet.ttl > 1 else { return }
-            
-            if let message = BitchatMessage(packet.payload) {
-                guard message.senderPeerID != node.peerID else { return }
-                
-                let relayMessage = BitchatMessage(
-                    id: message.id,
-                    sender: message.sender,
-                    content: message.content,
-                    timestamp: message.timestamp,
-                    isRelay: true,
-                    originalSender: message.isRelay ? message.originalSender : message.sender,
-                    isPrivate: message.isPrivate,
-                    recipientNickname: message.recipientNickname,
-                    senderPeerID: message.senderPeerID,
-                    mentions: message.mentions
-                )
-                
-                if let relayPayload = relayMessage.toBinaryPayload() {
-                    let relayPacket = BitchatPacket(
-                        type: packet.type,
-                        senderID: packet.senderID,
-                        recipientID: packet.recipientID,
-                        timestamp: packet.timestamp,
-                        payload: relayPayload,
-                        signature: packet.signature,
-                        ttl: packet.ttl - 1
-                    )
-                    
-                    for hop in nextHops {
-                        self.nodes[hop]?.simulateIncomingPacket(relayPacket)
-                    }
-                }
-            }
-        }
-    }
-    
-    // MARK: - Noise sessions
-    
-    func establishNoiseSession(_ node1: String, _ node2: String) throws {
-        guard let manager1 = noiseManagers[node1],
-              let manager2 = noiseManagers[node2],
-              let peer1ID = nodes[node1]?.peerID,
-              let peer2ID = nodes[node2]?.peerID else { return }
-        
-        let msg1 = try manager1.initiateHandshake(with: peer2ID)
-        let msg2 = try manager2.handleIncomingHandshake(from: peer1ID, message: msg1)!
-        let msg3 = try manager1.handleIncomingHandshake(from: peer2ID, message: msg2)!
-        _ = try manager2.handleIncomingHandshake(from: peer1ID, message: msg3)
-    }
-}
-

bitchatTests/LocationChannelsTests.swift

@@ -1,9 +1,8 @@
-import Testing
+import XCTest
-import Foundation
 @testable import bitchat
 
-struct LocationChannelsTests {
+final class LocationChannelsTests: XCTestCase {
-    @Test func geohashEncoderPrecisionMapping() {
+    func testGeohashEncoderPrecisionMapping() {
         // Sanity: known coords (Statue of Liberty approx)
         let lat = 40.6892
         let lon = -74.0445
@@ -13,35 +12,34 @@ struct LocationChannelsTests {
         let region = Geohash.encode(latitude: lat, longitude: lon, precision: GeohashChannelLevel.province.precision)
         let country = Geohash.encode(latitude: lat, longitude: lon, precision: GeohashChannelLevel.region.precision)
         
-        #expect(block.count == 7)
+        XCTAssertEqual(block.count, 7)
-        #expect(neighborhood.count == 6)
+        XCTAssertEqual(neighborhood.count, 6)
-        #expect(city.count == 5)
+        XCTAssertEqual(city.count, 5)
-        #expect(region.count == 4)
+        XCTAssertEqual(region.count, 4)
-        #expect(country.count == 2)
+        XCTAssertEqual(country.count, 2)
         
         // All prefixes must match progressively
-        #expect(block.hasPrefix(neighborhood))
+        XCTAssertTrue(block.hasPrefix(neighborhood))
-        #expect(neighborhood.hasPrefix(city))
+        XCTAssertTrue(neighborhood.hasPrefix(city))
-        #expect(city.hasPrefix(region))
+        XCTAssertTrue(city.hasPrefix(region))
-        #expect(region.hasPrefix(country))
+        XCTAssertTrue(region.hasPrefix(country))
     }
 
-    @Test func nostrGeohashFilterEncoding() throws {
+    func testNostrGeohashFilterEncoding() throws {
         let gh = "u4pruy"
         let filter = NostrFilter.geohashEphemeral(gh)
         let data = try JSONEncoder().encode(filter)
         let json = String(data: data, encoding: .utf8) ?? ""
         // Expect kinds includes 20000 and tag filter '#g':[gh]
-        #expect(json.contains("20000"))
+        XCTAssertTrue(json.contains("20000"))
-        #expect(json.contains("\"#g\":[\"\(gh)\"]"))
+        XCTAssertTrue(json.contains("\"#g\":[\"\(gh)\"]"))
     }
 
-    @Test func perGeohashIdentityDeterministic() throws {
+    func testPerGeohashIdentityDeterministic() throws {
         // Derive twice for same geohash; should be identical
-        let idBridge = NostrIdentityBridge(keychain: MockKeychainHelper())
         let gh = "u4pruy"
-        let id1 = try idBridge.deriveIdentity(forGeohash: gh)
+        let id1 = try NostrIdentityBridge.deriveIdentity(forGeohash: gh)
-        let id2 = try idBridge.deriveIdentity(forGeohash: gh)
+        let id2 = try NostrIdentityBridge.deriveIdentity(forGeohash: gh)
-        #expect(id1.publicKeyHex == id2.publicKeyHex)
+        XCTAssertEqual(id1.publicKeyHex, id2.publicKeyHex)
     }
 }

bitchatTests/LocationNotesManagerTests.swift

@@ -1,9 +1,8 @@
-import Testing
+import XCTest
-import Foundation
 @testable import bitchat
 
 @MainActor
-struct LocationNotesManagerTests {
+final class LocationNotesManagerTests: XCTestCase {
 //    func testSubscribeWithoutRelaysSetsNoRelaysState() {
 //        var subscribeCalled = false
 //        let deps = LocationNotesDependencies(
@@ -48,15 +47,15 @@ struct LocationNotesManagerTests {
 //        XCTAssertNotEqual(manager.errorMessage, "location_notes.error.no_relays")
 //    }
 
-    @Test func subscribeUsesGeoRelaysAndAppendsNotes() {
+    func testSubscribeUsesGeoRelaysAndAppendsNotes() {
         var relaysCaptured: [String] = []
         var storedHandler: ((NostrEvent) -> Void)?
         var storedEOSE: (() -> Void)?
         let deps = LocationNotesDependencies(
             relayLookup: { _, _ in ["wss://relay.one"] },
             subscribe: { filter, id, relays, handler, eose in
-                #expect(filter.kinds == [1])
+                XCTAssertEqual(filter.kinds, [1])
-                #expect(!id.isEmpty)
+                XCTAssertFalse(id.isEmpty)
                 relaysCaptured = relays
                 storedHandler = handler
                 storedEOSE = eose
@@ -68,8 +67,8 @@ struct LocationNotesManagerTests {
         )
 
         let manager = LocationNotesManager(geohash: "u4pruydq", dependencies: deps)
-        #expect(relaysCaptured == ["wss://relay.one"])
+        XCTAssertEqual(relaysCaptured, ["wss://relay.one"])
-        #expect(manager.state == .loading)
+        XCTAssertEqual(manager.state, .loading)
 
         var event = NostrEvent(
             pubkey: "pub",
@@ -82,12 +81,70 @@ struct LocationNotesManagerTests {
         storedHandler?(event)
         storedEOSE?()
 
-        #expect(manager.state == .ready)
+        XCTAssertEqual(manager.state, .ready)
-        #expect(manager.notes.count == 1)
+        XCTAssertEqual(manager.notes.count, 1)
-        #expect(manager.notes.first?.content == "hi")
+        XCTAssertEqual(manager.notes.first?.content, "hi")
     }
 
     private enum TestError: Error {
         case shouldNotDerive
     }
 }
+
+@MainActor
+final class LocationNotesCounterTests: XCTestCase {
+    func testSubscribeWithoutRelaysMarksUnavailable() {
+        var subscribeCalled = false
+        let deps = LocationNotesCounterDependencies(
+            relayLookup: { _, _ in [] },
+            subscribe: { _, _, _, _, _ in subscribeCalled = true },
+            unsubscribe: { _ in }
+        )
+
+        let counter = LocationNotesCounter(testDependencies: deps)
+        counter.subscribe(geohash: "u4pruydq")
+
+        XCTAssertFalse(subscribeCalled)
+        XCTAssertFalse(counter.relayAvailable)
+        XCTAssertTrue(counter.initialLoadComplete)
+        XCTAssertEqual(counter.count, 0)
+    }
+
+    func testSubscribeCountsUniqueNotes() {
+        var storedHandler: ((NostrEvent) -> Void)?
+        var storedEOSE: (() -> Void)?
+        let deps = LocationNotesCounterDependencies(
+            relayLookup: { _, _ in ["wss://relay.geo"] },
+            subscribe: { filter, id, relays, handler, eose in
+                XCTAssertEqual(relays, ["wss://relay.geo"])
+                XCTAssertEqual(filter.kinds, [1])
+                XCTAssertFalse(id.isEmpty)
+                storedHandler = handler
+                storedEOSE = eose
+            },
+            unsubscribe: { _ in }
+        )
+
+        let counter = LocationNotesCounter(testDependencies: deps)
+        counter.subscribe(geohash: "u4pruydq")
+
+        var first = NostrEvent(
+            pubkey: "pub",
+            createdAt: Date(),
+            kind: .textNote,
+            tags: [["g", "u4pruydq"]],
+            content: "a"
+        )
+        first.id = "eventA"
+        storedHandler?(first)
+
+        let duplicate = first
+        storedHandler?(duplicate)
+
+        storedEOSE?()
+
+        XCTAssertTrue(counter.relayAvailable)
+        XCTAssertEqual(counter.count, 1)
+        XCTAssertTrue(counter.initialLoadComplete)
+    }
+}

bitchatTests/Mocks/MockBLEBus.swift

@@ -1,57 +0,0 @@
-//
-// MockBLEBus.swift
-// bitchatTests
-//
-// This is free and unencumbered software released into the public domain.
-// For more information, see <https://unlicense.org>
-//
-
-import Foundation
-@testable import bitchat
-
-final class MockBLEBus {
-    private var registry: [PeerID: MockBLEService] = [:]
-    private var adjacency: [PeerID: Set<PeerID>] = [:]
-
-    // Enable automatic flooding for public messages in integration tests only
-    let autoFloodEnabled: Bool
-    
-    init(autoFloodEnabled: Bool = false) {
-        self.autoFloodEnabled = autoFloodEnabled
-    }
-
-    func register(_ service: MockBLEService, for peerID: PeerID) {
-        registry[peerID] = service
-        if adjacency[peerID] == nil { adjacency[peerID] = [] }
-    }
-
-    func connect(_ a: PeerID, _ b: PeerID) {
-        var setA = adjacency[a] ?? []
-        setA.insert(b)
-        adjacency[a] = setA
-        var setB = adjacency[b] ?? []
-        setB.insert(a)
-        adjacency[b] = setB
-    }
-
-    func disconnect(_ a: PeerID, _ b: PeerID) {
-        if var setA = adjacency[a] { setA.remove(b); adjacency[a] = setA }
-        if var setB = adjacency[b] { setB.remove(a); adjacency[b] = setB }
-    }
-
-    func neighbors(of peerID: PeerID) -> [MockBLEService] {
-        let ids = adjacency[peerID] ?? []
-        let result = ids.compactMap { registry[$0] }
-        return result
-    }
-
-    func isDirectNeighbor(_ a: PeerID, _ b: PeerID) -> Bool {
-        let res = adjacency[a]?.contains(b) ?? false
-        return res
-    }
-
-    func service(for peerID: PeerID) -> MockBLEService? {
-        let svc = registry[peerID]
-        return svc
-    }
-}

bitchatTests/Mocks/MockBLEService.swift

@@ -26,12 +26,13 @@ import CoreBluetooth
 ///   simulate broadcast propagation across the mesh. E2E tests keep it off and perform explicit
 ///   relays when needed.
 final class MockBLEService: NSObject {
-    private let bus: MockBLEBus
+    // Enable automatic flooding for public messages in integration tests only
+    static var autoFloodEnabled: Bool = false
     
     // MARK: - Properties matching BLEService
     
     weak var delegate: BitchatDelegate?
-    var myPeerID = PeerID(str: "MOCK1234")
+    var myPeerID: PeerID = "MOCK1234"
     var myNickname: String = "MockUser"
     
     private let mockKeychain = MockKeychain()
@@ -59,8 +60,8 @@ final class MockBLEService: NSObject {
     
     // MARK: - Initialization
     
-    init(bus: MockBLEBus) {
+    override init() {
-        self.bus = bus
+        super.init()
     }
     
     // MARK: - Methods matching BLEService
@@ -70,15 +71,42 @@ final class MockBLEService: NSObject {
     }
     
     // MARK: - In-memory test bus (for E2E/Integration)
+    /// Global per-process bus for deterministic routing in tests.
+    private static var registry: [PeerID: MockBLEService] = [:]
+    private static var adjacency: [PeerID: Set<PeerID>] = [:]
+
+    /// Clears global bus state. Call from test `setUp()`.
+    static func resetTestBus() {
+        registry.removeAll()
+        adjacency.removeAll()
+    }
 
     /// Registers this instance on first use.
     private func registerIfNeeded() {
-        bus.register(self, for: myPeerID)
+        MockBLEService.registry[myPeerID] = self
+        if MockBLEService.adjacency[myPeerID] == nil { MockBLEService.adjacency[myPeerID] = [] }
     }
 
     /// Returns adjacent neighbors based on the current simulated topology.
     private func neighbors() -> [MockBLEService] {
-        bus.neighbors(of: myPeerID)
+        guard let ids = MockBLEService.adjacency[myPeerID] else { return [] }
+        return ids.compactMap { MockBLEService.registry[$0] }
+    }
+
+    /// Adds an undirected edge between two peerIDs.
+    private static func connectPeers(_ a: PeerID, _ b: PeerID) {
+        var setA = adjacency[a] ?? []
+        setA.insert(b)
+        adjacency[a] = setA
+        var setB = adjacency[b] ?? []
+        setB.insert(a)
+        adjacency[b] = setB
+    }
+
+    /// Removes an undirected edge between two peerIDs.
+    private static func disconnectPeers(_ a: PeerID, _ b: PeerID) {
+        if var setA = adjacency[a] { setA.remove(b); adjacency[a] = setA }
+        if var setB = adjacency[b] { setB.remove(a); adjacency[b] = setB }
     }
 
     func startServices() {
@@ -145,7 +173,7 @@ final class MockBLEService: NSObject {
             // Surface raw packet to tests that intercept/relay/encrypt
             packetDeliveryHandler?(packet)
 
-            // Deliver public messages to adjacent peers via bus
+            // Deliver public messages to adjacent peers via test bus
             if recipientID == nil {
                 for neighbor in neighbors() {
                     neighbor.simulateIncomingPacket(packet)
@@ -153,15 +181,7 @@ final class MockBLEService: NSObject {
             }
         }
     }
-
+    
-    func sendFileBroadcast(_ packet: BitchatFilePacket, transferId: String) {
-        // Tests currently ignore file transfer flows; keep stub for protocol conformance.
-    }
-
-    func sendFilePrivate(_ packet: BitchatFilePacket, to peerID: PeerID, transferId: String) {
-        // Tests currently ignore file transfer flows; keep stub for protocol conformance.
-    }
-
     func sendPrivateMessage(_ content: String, to recipientPeerID: PeerID, recipientNickname: String, messageID: String) {
         let message = BitchatMessage(
             id: messageID,
@@ -199,16 +219,20 @@ final class MockBLEService: NSObject {
             packetDeliveryHandler?(packet)
 
             // If directly connected to recipient, deliver only to them.
-            if bus.isDirectNeighbor(myPeerID, recipientPeerID),
+            if let neighbors = MockBLEService.adjacency[myPeerID], neighbors.contains(recipientPeerID),
-               let target = bus.service(for: recipientPeerID) {
+               let target = MockBLEService.registry[recipientPeerID] {
                 target.simulateIncomingPacket(packet)
             } else {
                 // Not directly connected: deliver to neighbors for relay; also deliver directly if target is known
-                if let target = bus.service(for: recipientPeerID) {
+                if let target = MockBLEService.registry[recipientPeerID] {
                     target.simulateIncomingPacket(packet)
                 }
-                for neighbor in neighbors() where neighbor.peerID != recipientPeerID {
+                if let neighbors = MockBLEService.adjacency[myPeerID] {
-                    neighbor.simulateIncomingPacket(packet)
+                    for peer in neighbors where peer != recipientPeerID {
+                        if let neighbor = MockBLEService.registry[peer] {
+                            neighbor.simulateIncomingPacket(packet)
+                        }
+                    }
                 }
             }
         }
@@ -255,14 +279,14 @@ final class MockBLEService: NSObject {
     
     func simulateConnectedPeer(_ peerID: PeerID) {
         registerIfNeeded()
-        bus.connect(myPeerID, peerID)
+        MockBLEService.connectPeers(myPeerID, peerID)
         connectedPeers.insert(peerID)
         delegate?.didConnectToPeer(peerID)
         delegate?.didUpdatePeerList(Array(connectedPeers))
     }
     
     func simulateDisconnectedPeer(_ peerID: PeerID) {
-        bus.disconnect(myPeerID, peerID)
+        MockBLEService.disconnectPeers(myPeerID, peerID)
         connectedPeers.remove(peerID)
         delegate?.didDisconnectFromPeer(peerID)
         delegate?.didUpdatePeerList(Array(connectedPeers))
@@ -295,7 +319,7 @@ final class MockBLEService: NSObject {
                 // When enabled, propagate a public broadcast across the entire connected
                 // component regardless of the original TTL to better emulate large-network
                 // broadcast expectations. De-duplication via seenMessageIDs prevents loops.
-                if bus.autoFloodEnabled,
+                if MockBLEService.autoFloodEnabled,
                    packet.recipientID == nil,
                    !message.isPrivate {
                     let nextTTL = packet.ttl > 0 ? packet.ttl - 1 : 0
@@ -329,8 +353,8 @@ typealias MockSimplifiedBluetoothService = MockBLEService
 // MARK: - Helpers
 
 extension MockBLEService {
-    convenience init(peerID: PeerID, nickname: String, bus: MockBLEBus) {
+    convenience init(peerID: PeerID, nickname: String) {
-        self.init(bus: bus)
+        self.init()
         myPeerID = peerID
         mockNickname = nickname
     }