rfc: paginated chat previews

* expand ranges to fit ghc 8.10 & 9.6

* update nix

* use hashes from mq master

* fix more deps

* use network-transport from hackage

README.md

@@ -232,6 +232,8 @@ You can use SimpleX with your own servers and still communicate with people usin
 
 Recent and important updates:
 
+[Nov 25, 2023. SimpleX Chat v5.4 released: link mobile and desktop apps via quantum resistant protocol, and much better groups](./blog/20231125-simplex-chat-v5-4-link-mobile-desktop-quantum-resistant-better-groups.md).
+
 [Sep 25, 2023. SimpleX Chat v5.3 released: desktop app, local file encryption, improved groups and directory service](./blog/20230925-simplex-chat-v5-3-desktop-app-local-file-encryption-directory-service.md).
 
 [Jul 22, 2023. SimpleX Chat: v5.2 released with message delivery receipts](./blog/20230722-simplex-chat-v5-2-message-delivery-receipts.md).
@@ -366,13 +368,13 @@ Please also join [#simplex-devs](https://simplex.chat/contact#/?v=1-2&smp=smp%3A
 - ✅ Message delivery confirmation (with sender opt-out per contact).
 - ✅ Desktop client.
 - ✅ Encryption of local files stored in the app.
-- 🏗 Using mobile profiles from the desktop app.
+- ✅ Using mobile profiles from the desktop app.
+- 🏗 Improve experience for the new users.
+- 🏗 Post-quantum resistant key exchange in double ratchet protocol.
+- 🏗 Large groups, communities and public channels.
 - Message delivery relay for senders (to conceal IP address from the recipients' servers and to reduce the traffic).
-- Post-quantum resistant key exchange in double ratchet protocol.
-- Large groups, communities and public channels.
 - Privacy & security slider - a simple way to set all settings at once.
 - Improve sending videos (including encryption of locally stored videos).
-- Improve experience for the new users.
 - SMP queue redundancy and rotation (manual is supported).
 - Include optional message into connection request sent via contact address.
 - Improved navigation and search in the conversation (expand and scroll to quoted message, scroll to search results, etc.).

apps/ios/Shared/Model/ChatModel.swift

@@ -83,7 +83,7 @@ final class ChatModel: ObservableObject {
     // current WebRTC call
     @Published var callInvitations: Dictionary<ChatId, RcvCallInvitation> = [:]
     @Published var activeCall: Call?
-    @Published var callCommand: WCallCommand?
+    let callCommand: WebRTCCommandProcessor = WebRTCCommandProcessor()
     @Published var showCallView = false
     // remote desktop
     @Published var remoteCtrlSession: RemoteCtrlSession?
@@ -267,7 +267,20 @@ final class ChatModel: ObservableObject {
     func addChatItem(_ cInfo: ChatInfo, _ cItem: ChatItem) {
         // update previews
         if let i = getChatIndex(cInfo.id) {
-            chats[i].chatItems = [cItem]
+            chats[i].chatItems = switch cInfo {
+            case .group:
+                if let currentPreviewItem = chats[i].chatItems.first {
+                    if cItem.meta.itemTs >= currentPreviewItem.meta.itemTs {
+                        [cItem]
+                    } else {
+                        [currentPreviewItem]
+                    }
+                } else {
+                    [cItem]
+                }
+            default:
+                [cItem]
+            }
             if case .rcvNew = cItem.meta.itemStatus {
                 chats[i].chatStats.unreadCount = chats[i].chatStats.unreadCount + 1
                 increaseUnreadCounter(user: currentUser!)

apps/ios/Shared/Model/SimpleXAPI.swift

@@ -605,27 +605,29 @@ func apiConnectPlan(connReq: String) async throws -> ConnectionPlan {
     throw r
 }
 
-func apiConnect(incognito: Bool, connReq: String) async -> ConnReqType? {
-    let (connReqType, alert) = await apiConnect_(incognito: incognito, connReq: connReq)
+func apiConnect(incognito: Bool, connReq: String) async -> (ConnReqType, PendingContactConnection)? {
+    let (r, alert) = await apiConnect_(incognito: incognito, connReq: connReq)
     if let alert = alert {
         AlertManager.shared.showAlert(alert)
         return nil
     } else {
-        return connReqType
+        return r
     }
 }
 
-func apiConnect_(incognito: Bool, connReq: String) async -> (ConnReqType?, Alert?) {
+func apiConnect_(incognito: Bool, connReq: String) async -> ((ConnReqType, PendingContactConnection)?, Alert?) {
     guard let userId = ChatModel.shared.currentUser?.userId else {
         logger.error("apiConnect: no current user")
         return (nil, nil)
     }
     let r = await chatSendCmd(.apiConnect(userId: userId, incognito: incognito, connReq: connReq))
+    let m = ChatModel.shared
     switch r {
-    case .sentConfirmation: return (.invitation, nil)
-    case .sentInvitation: return (.contact, nil)
+    case let .sentConfirmation(_, connection):
+        return ((.invitation, connection), nil)
+    case let .sentInvitation(_, connection):
+        return ((.contact, connection), nil)
     case let .contactAlreadyExists(_, contact):
-        let m = ChatModel.shared
         if let c = m.getContactChat(contact.contactId) {
             await MainActor.run { m.chatId = c.id }
         }
@@ -1362,18 +1364,6 @@ func processReceivedMsg(_ res: ChatResponse) async {
     let m = ChatModel.shared
     logger.debug("processReceivedMsg: \(res.responseType)")
     switch res {
-    case let .newContactConnection(user, connection):
-        if active(user) {
-            await MainActor.run {
-                m.updateContactConnection(connection)
-            }
-        }
-    case let .contactConnectionDeleted(user, connection):
-        if active(user) {
-            await MainActor.run {
-                m.removeChat(connection.id)
-            }
-        }
     case let .contactDeletedByContact(user, contact):
         if active(user) && contact.directOrUsed {
             await MainActor.run {
@@ -1666,36 +1656,40 @@ func processReceivedMsg(_ res: ChatResponse) async {
         activateCall(invitation)
     case let .callOffer(_, contact, callType, offer, sharedKey, _):
         await withCall(contact) { call in
-            call.callState = .offerReceived
-            call.peerMedia = callType.media
-            call.sharedKey = sharedKey
+            await MainActor.run {
+                call.callState = .offerReceived
+                call.peerMedia = callType.media
+                call.sharedKey = sharedKey
+            }
             let useRelay = UserDefaults.standard.bool(forKey: DEFAULT_WEBRTC_POLICY_RELAY)
             let iceServers = getIceServers()
             logger.debug(".callOffer useRelay \(useRelay)")
             logger.debug(".callOffer iceServers \(String(describing: iceServers))")
-            m.callCommand = .offer(
+            await m.callCommand.processCommand(.offer(
                 offer: offer.rtcSession,
                 iceCandidates: offer.rtcIceCandidates,
                 media: callType.media, aesKey: sharedKey,
                 iceServers: iceServers,
                 relay: useRelay
-            )
+            ))
         }
     case let .callAnswer(_, contact, answer):
         await withCall(contact) { call in
-            call.callState = .answerReceived
-            m.callCommand = .answer(answer: answer.rtcSession, iceCandidates: answer.rtcIceCandidates)
+            await MainActor.run {
+                call.callState = .answerReceived
+            }
+            await m.callCommand.processCommand(.answer(answer: answer.rtcSession, iceCandidates: answer.rtcIceCandidates))
         }
     case let .callExtraInfo(_, contact, extraInfo):
         await withCall(contact) { _ in
-            m.callCommand = .ice(iceCandidates: extraInfo.rtcIceCandidates)
+            await m.callCommand.processCommand(.ice(iceCandidates: extraInfo.rtcIceCandidates))
         }
     case let .callEnded(_, contact):
         if let invitation = await MainActor.run(body: { m.callInvitations.removeValue(forKey: contact.id) }) {
             CallController.shared.reportCallRemoteEnded(invitation: invitation)
         }
         await withCall(contact) { call in
-            m.callCommand = .end
+            await m.callCommand.processCommand(.end)
             CallController.shared.reportCallRemoteEnded(call: call)
         }
     case .chatSuspended:
@@ -1753,9 +1747,9 @@ func processReceivedMsg(_ res: ChatResponse) async {
         logger.debug("unsupported event: \(res.responseType)")
     }
 
-    func withCall(_ contact: Contact, _ perform: (Call) -> Void) async {
+    func withCall(_ contact: Contact, _ perform: (Call) async -> Void) async {
         if let call = m.activeCall, call.contact.apiId == contact.apiId {
-            await MainActor.run { perform(call) }
+            await perform(call)
         } else {
             logger.debug("processReceivedMsg: ignoring \(res.responseType), not in call with the contact \(contact.id)")
         }

apps/ios/Shared/Views/Call/ActiveCallView.swift

@@ -49,10 +49,10 @@ struct ActiveCallView: View {
         }
         .onDisappear {
             logger.debug("ActiveCallView: disappear")
+            Task { await m.callCommand.setClient(nil) }
             AppDelegate.keepScreenOn(false)
             client?.endCall()
         }
-        .onChange(of: m.callCommand) { _ in sendCommandToClient()}
         .background(.black)
         .preferredColorScheme(.dark)
     }
@@ -60,19 +60,8 @@ struct ActiveCallView: View {
     private func createWebRTCClient() {
         if client == nil && canConnectCall {
             client = WebRTCClient($activeCall, { msg in await MainActor.run { processRtcMessage(msg: msg) } }, $localRendererAspectRatio)
-            sendCommandToClient()
-        }
-    }
-
-    private func sendCommandToClient() {
-        if call == m.activeCall,
-           m.activeCall != nil,
-           let client = client,
-           let cmd = m.callCommand {
-            m.callCommand = nil
-            logger.debug("sendCallCommand: \(cmd.cmdType)")
             Task {
-                await client.sendCallCommand(command: cmd)
+                await m.callCommand.setClient(client)
             }
         }
     }
@@ -168,8 +157,10 @@ struct ActiveCallView: View {
                 }
             case let .error(message):
                 logger.debug("ActiveCallView: command error: \(message)")
+                AlertManager.shared.showAlert(Alert(title: Text("Error"), message: Text(message)))
             case let .invalid(type):
                 logger.debug("ActiveCallView: invalid response: \(type)")
+                AlertManager.shared.showAlert(Alert(title: Text("Invalid response"), message: Text(type)))
             }
         }
     }
@@ -255,7 +246,6 @@ struct ActiveCallOverlay: View {
                 HStack {
                     Text(call.encryptionStatus)
                     if let connInfo = call.connectionInfo {
-//                        Text("(") + Text(connInfo.text) + Text(", \(connInfo.protocolText))")
                         Text("(") + Text(connInfo.text) + Text(")")
                     }
                 }

apps/ios/Shared/Views/Call/CallManager.swift

@@ -22,7 +22,7 @@ class CallManager {
         let m = ChatModel.shared
         if let call = m.activeCall, call.callkitUUID == callUUID {
             m.showCallView = true
-            m.callCommand = .capabilities(media: call.localMedia)
+            Task { await m.callCommand.processCommand(.capabilities(media: call.localMedia)) }
             return true
         }
         return false
@@ -57,19 +57,21 @@ class CallManager {
             m.activeCall = call
             m.showCallView = true
 
-            m.callCommand = .start(
+            Task {
+                await m.callCommand.processCommand(.start(
                 media: invitation.callType.media,
                 aesKey: invitation.sharedKey,
                 iceServers: iceServers,
                 relay: useRelay
-            )
+                ))
+            }
         }
     }
 
     func enableMedia(media: CallMediaType, enable: Bool, callUUID: UUID) -> Bool {
         if let call = ChatModel.shared.activeCall, call.callkitUUID == callUUID {
             let m = ChatModel.shared
-            m.callCommand = .media(media: media, enable: enable)
+            Task { await m.callCommand.processCommand(.media(media: media, enable: enable)) }
             return true
         }
         return false
@@ -94,11 +96,13 @@ class CallManager {
             completed()
         } else {
             logger.debug("CallManager.endCall: ending call...")
-            m.callCommand = .end
-            m.activeCall = nil
-            m.showCallView = false
-            completed()
             Task {
+                await m.callCommand.processCommand(.end)
+                await MainActor.run {
+                    m.activeCall = nil
+                    m.showCallView = false
+                    completed()
+                }
                 do {
                     try await apiEndCall(call.contact)
                 } catch {

apps/ios/Shared/Views/Call/WebRTC.swift

@@ -335,6 +335,50 @@ extension WCallResponse: Encodable {
     }
 }
 
+actor WebRTCCommandProcessor {
+    private var client: WebRTCClient? = nil
+    private var commands: [WCallCommand] = []
+    private var running: Bool = false
+
+    func setClient(_ client: WebRTCClient?) async {
+        logger.debug("WebRTC: setClient, commands count \(self.commands.count)")
+        self.client = client
+        if client != nil {
+            await processAllCommands()
+        } else {
+            commands.removeAll()
+        }
+    }
+
+    func processCommand(_ c: WCallCommand) async {
+//        logger.debug("WebRTC: process command \(c.cmdType)")
+        commands.append(c)
+        if !running && client != nil {
+            await processAllCommands()
+        }
+    }
+
+    func processAllCommands() async {
+        logger.debug("WebRTC: process all commands, commands count \(self.commands.count), client == nil \(self.client == nil)")
+        if let client = client {
+            running = true
+            while let c = commands.first, shouldRunCommand(client, c) {
+                commands.remove(at: 0)
+                await client.sendCallCommand(command: c)
+                logger.debug("WebRTC: processed cmd \(c.cmdType)")
+            }
+            running = false
+        }
+    }
+
+    func shouldRunCommand(_ client: WebRTCClient, _ c: WCallCommand) -> Bool {
+        switch c {
+        case .capabilities, .start, .offer, .end: true
+        default: client.activeCall.wrappedValue != nil
+        }
+    }
+}
+
 struct ConnectionState: Codable, Equatable {
     var connectionState: String
     var iceConnectionState: String
@@ -358,26 +402,12 @@ struct ConnectionInfo: Codable, Equatable {
             return "\(local?.rawValue ?? unknown) / \(remote?.rawValue ?? unknown)"
         }
     }
-
-    var protocolText: String {
-        let unknown = NSLocalizedString("unknown", comment: "connection info")
-        let local = localCandidate?.protocol?.uppercased() ?? unknown
-        let localRelay = localCandidate?.relayProtocol?.uppercased() ?? unknown
-        let remote = remoteCandidate?.protocol?.uppercased() ?? unknown
-        let localText = localRelay == local || localCandidate?.relayProtocol == nil
-                        ? local
-                        : "\(local) (\(localRelay))"
-        return local == remote
-                ? localText
-                : "\(localText) / \(remote)"
-    }
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/RTCIceCandidate
 struct RTCIceCandidate: Codable, Equatable {
     var candidateType: RTCIceCandidateType?
     var `protocol`: String?
-    var relayProtocol: String?
     var sdpMid: String?
     var sdpMLineIndex: Int?
     var candidate: String

apps/ios/Shared/Views/Call/WebRTCClient.swift

@@ -21,7 +21,7 @@ final class WebRTCClient: NSObject, RTCVideoViewDelegate, RTCFrameEncryptorDeleg
 
     struct Call {
         var connection: RTCPeerConnection
-        var iceCandidates: [RTCIceCandidate]
+        var iceCandidates: IceCandidates
         var localMedia: CallMediaType
         var localCamera: RTCVideoCapturer?
         var localVideoSource: RTCVideoSource?
@@ -33,10 +33,24 @@ final class WebRTCClient: NSObject, RTCVideoViewDelegate, RTCFrameEncryptorDeleg
         var frameDecryptor: RTCFrameDecryptor?
     }
 
+    actor IceCandidates {
+        private var candidates: [RTCIceCandidate] = []
+
+        func getAndClear() async -> [RTCIceCandidate] {
+            let cs = candidates
+            candidates = []
+            return cs
+        }
+
+        func append(_ c: RTCIceCandidate) async {
+            candidates.append(c)
+        }
+    }
+
     private let rtcAudioSession =  RTCAudioSession.sharedInstance()
     private let audioQueue = DispatchQueue(label: "audio")
     private var sendCallResponse: (WVAPIMessage) async -> Void
-    private var activeCall: Binding<Call?>
+    var activeCall: Binding<Call?>
     private var localRendererAspectRatio: Binding<CGFloat?>
 
     @available(*, unavailable)
@@ -60,7 +74,7 @@ final class WebRTCClient: NSObject, RTCVideoViewDelegate, RTCFrameEncryptorDeleg
         WebRTC.RTCIceServer(urlStrings: ["turn:turn.simplex.im:443?transport=tcp"], username: "private", credential: "yleob6AVkiNI87hpR94Z"),
     ]
 
-    func initializeCall(_ iceServers: [WebRTC.RTCIceServer]?, _ remoteIceCandidates: [RTCIceCandidate], _ mediaType: CallMediaType, _ aesKey: String?, _ relay: Bool?) -> Call {
+    func initializeCall(_ iceServers: [WebRTC.RTCIceServer]?, _ mediaType: CallMediaType, _ aesKey: String?, _ relay: Bool?) -> Call {
         let connection = createPeerConnection(iceServers ?? getWebRTCIceServers() ?? defaultIceServers, relay)
         connection.delegate = self
         createAudioSender(connection)
@@ -87,7 +101,7 @@ final class WebRTCClient: NSObject, RTCVideoViewDelegate, RTCFrameEncryptorDeleg
         }
         return Call(
             connection: connection,
-            iceCandidates: remoteIceCandidates,
+            iceCandidates: IceCandidates(),
             localMedia: mediaType,
             localCamera: localCamera,
             localVideoSource: localVideoSource,
@@ -144,26 +158,18 @@ final class WebRTCClient: NSObject, RTCVideoViewDelegate, RTCFrameEncryptorDeleg
             logger.debug("starting incoming call - create webrtc session")
             if activeCall.wrappedValue != nil { endCall() }
             let encryption = WebRTCClient.enableEncryption
-            let call = initializeCall(iceServers?.toWebRTCIceServers(), [], media, encryption ? aesKey : nil, relay)
+            let call = initializeCall(iceServers?.toWebRTCIceServers(), media, encryption ? aesKey : nil, relay)
             activeCall.wrappedValue = call
-            call.connection.offer { answer in
-                Task {
-                    let gotCandidates = await self.waitWithTimeout(10_000, stepMs: 1000, until: { self.activeCall.wrappedValue?.iceCandidates.count ?? 0 > 0 })
-                    if gotCandidates {
-                        await self.sendCallResponse(.init(
-                            corrId: nil,
-                            resp: .offer(
-                                offer: compressToBase64(input: encodeJSON(CustomRTCSessionDescription(type: answer.type.toSdpType(), sdp: answer.sdp))),
-                                iceCandidates: compressToBase64(input: encodeJSON(self.activeCall.wrappedValue?.iceCandidates ?? [])),
-                                capabilities: CallCapabilities(encryption: encryption)
-                            ),
-                            command: command)
-                        )
-                    } else {
-                        self.endCall()
-                    }
-                }
-
+            let (offer, error) = await call.connection.offer()
+            if let offer = offer {
+                resp = .offer(
+                    offer: compressToBase64(input: encodeJSON(CustomRTCSessionDescription(type: offer.type.toSdpType(), sdp: offer.sdp))),
+                    iceCandidates: compressToBase64(input: encodeJSON(await self.getInitialIceCandidates())),
+                    capabilities: CallCapabilities(encryption: encryption)
+                )
+                self.waitForMoreIceCandidates()
+            } else {
+                resp = .error(message: "offer error: \(error?.localizedDescription ?? "unknown error")")
             }
         case let .offer(offer, iceCandidates, media, aesKey, iceServers, relay):
             if activeCall.wrappedValue != nil {
@@ -172,26 +178,21 @@ final class WebRTCClient: NSObject, RTCVideoViewDelegate, RTCFrameEncryptorDeleg
                 resp = .error(message: "accept: encryption is not supported")
             } else if let offer: CustomRTCSessionDescription = decodeJSON(decompressFromBase64(input: offer)),
                       let remoteIceCandidates: [RTCIceCandidate] = decodeJSON(decompressFromBase64(input: iceCandidates)) {
-                let call = initializeCall(iceServers?.toWebRTCIceServers(), remoteIceCandidates, media, WebRTCClient.enableEncryption ? aesKey : nil, relay)
+                let call = initializeCall(iceServers?.toWebRTCIceServers(), media, WebRTCClient.enableEncryption ? aesKey : nil, relay)
                 activeCall.wrappedValue = call
                 let pc = call.connection
                 if let type = offer.type, let sdp = offer.sdp {
                     if (try? await pc.setRemoteDescription(RTCSessionDescription(type: type.toWebRTCSdpType(), sdp: sdp))) != nil {
-                        pc.answer { answer in
+                        let (answer, error) = await pc.answer()
+                        if let answer = answer {
                             self.addIceCandidates(pc, remoteIceCandidates)
-//                            Task {
-//                                try? await Task.sleep(nanoseconds: 32_000 * 1000000)
-                            Task {
-                                await self.sendCallResponse(.init(
-                                    corrId: nil,
-                                    resp: .answer(
-                                        answer: compressToBase64(input: encodeJSON(CustomRTCSessionDescription(type: answer.type.toSdpType(), sdp: answer.sdp))),
-                                        iceCandidates: compressToBase64(input: encodeJSON(call.iceCandidates))
-                                    ),
-                                    command: command)
-                                )
-                            }
-//                            }
+                            resp = .answer(
+                                answer: compressToBase64(input: encodeJSON(CustomRTCSessionDescription(type: answer.type.toSdpType(), sdp: answer.sdp))),
+                                iceCandidates: compressToBase64(input: encodeJSON(await self.getInitialIceCandidates()))
+                            )
+                            self.waitForMoreIceCandidates()
+                        } else {
+                            resp = .error(message: "answer error: \(error?.localizedDescription ?? "unknown error")")
                         }
                     } else {
                         resp = .error(message: "accept: remote description is not set")
@@ -234,6 +235,7 @@ final class WebRTCClient: NSObject, RTCVideoViewDelegate, RTCFrameEncryptorDeleg
                 resp = .ok
             }
         case .end:
+            // TODO possibly, endCall should be called before returning .ok
             await sendCallResponse(.init(corrId: nil, resp: .ok, command: command))
             endCall()
         }
@@ -242,6 +244,33 @@ final class WebRTCClient: NSObject, RTCVideoViewDelegate, RTCFrameEncryptorDeleg
         }
     }
 
+    func getInitialIceCandidates() async -> [RTCIceCandidate] {
+        await untilIceComplete(timeoutMs: 750, stepMs: 150) {}
+        let candidates = await activeCall.wrappedValue?.iceCandidates.getAndClear() ?? []
+        logger.debug("WebRTCClient: sending initial ice candidates: \(candidates.count)")
+        return candidates
+    }
+
+    func waitForMoreIceCandidates() {
+        Task {
+            await untilIceComplete(timeoutMs: 12000, stepMs: 1500) {
+                let candidates = await self.activeCall.wrappedValue?.iceCandidates.getAndClear() ?? []
+                if candidates.count > 0 {
+                    logger.debug("WebRTCClient: sending more ice candidates: \(candidates.count)")
+                    await self.sendIceCandidates(candidates)
+                }
+            }
+        }
+    }
+
+    func sendIceCandidates(_ candidates: [RTCIceCandidate]) async {
+        await self.sendCallResponse(.init(
+            corrId: nil,
+            resp: .ice(iceCandidates: compressToBase64(input: encodeJSON(candidates))),
+            command: nil)
+        )
+    }
+
     func enableMedia(_ media: CallMediaType, _ enable: Bool) {
         logger.debug("WebRTCClient: enabling media \(media.rawValue) \(enable)")
         media == .video ? setVideoEnabled(enable) : setAudioEnabled(enable)
@@ -387,12 +416,13 @@ final class WebRTCClient: NSObject, RTCVideoViewDelegate, RTCFrameEncryptorDeleg
         audioSessionToDefaults()
     }
 
-    func waitWithTimeout(_ timeoutMs: UInt64, stepMs: UInt64, until success: () -> Bool) async -> Bool {
-        let startedAt = DispatchTime.now()
-        while !success() && startedAt.uptimeNanoseconds + timeoutMs * 1000000 > DispatchTime.now().uptimeNanoseconds {
-            guard let _ = try? await Task.sleep(nanoseconds: stepMs * 1000000) else { break }
-        }
-        return success()
+    func untilIceComplete(timeoutMs: UInt64, stepMs: UInt64, action: @escaping () async -> Void) async {
+        var t: UInt64 = 0
+        repeat {
+            _ = try? await Task.sleep(nanoseconds: stepMs * 1000000)
+            t += stepMs
+            await action()
+        } while t < timeoutMs && activeCall.wrappedValue?.connection.iceGatheringState != .complete
     }
 }
 
@@ -405,25 +435,33 @@ extension WebRTC.RTCPeerConnection {
             optionalConstraints: nil)
     }
 
-    func offer(_ completion: @escaping (_ sdp: RTCSessionDescription) -> Void) {
-        offer(for: mediaConstraints()) { (sdp, error) in
-            guard let sdp = sdp else {
-                return
+    func offer() async -> (RTCSessionDescription?, Error?) {
+        await withCheckedContinuation { cont in
+            offer(for: mediaConstraints()) { (sdp, error) in
+                self.processSDP(cont, sdp, error)
             }
-            self.setLocalDescription(sdp, completionHandler: { (error) in
-                completion(sdp)
-            })
         }
     }
 
-    func answer(_ completion: @escaping (_ sdp: RTCSessionDescription) -> Void)  {
-        answer(for: mediaConstraints()) { (sdp, error) in
-            guard let sdp = sdp else {
-                return
+    func answer() async -> (RTCSessionDescription?, Error?)  {
+        await withCheckedContinuation { cont in
+            answer(for: mediaConstraints()) { (sdp, error) in
+                self.processSDP(cont, sdp, error)
             }
+        }
+    }
+
+    private func processSDP(_ cont: CheckedContinuation<(RTCSessionDescription?, Error?), Never>, _ sdp: RTCSessionDescription?, _ error: Error?) {
+        if let sdp = sdp {
             self.setLocalDescription(sdp, completionHandler: { (error) in
-                completion(sdp)
+                if let error = error {
+                    cont.resume(returning: (nil, error))
+                } else {
+                    cont.resume(returning: (sdp, nil))
+                }
             })
+        } else {
+            cont.resume(returning: (nil, error))
         }
     }
 }
@@ -479,6 +517,7 @@ extension WebRTCClient: RTCPeerConnectionDelegate {
                 default: enableSpeaker = false
                 }
                 setSpeakerEnabledAndConfigureSession(enableSpeaker)
+            case .connected: sendConnectedEvent(connection)
             case .disconnected, .failed: endCall()
             default: do {}
             }
@@ -491,7 +530,9 @@ extension WebRTCClient: RTCPeerConnectionDelegate {
 
     func peerConnection(_ connection: RTCPeerConnection, didGenerate candidate: WebRTC.RTCIceCandidate) {
 //        logger.debug("Connection generated candidate \(candidate.debugDescription)")
-        activeCall.wrappedValue?.iceCandidates.append(candidate.toCandidate(nil, nil, nil))
+        Task {
+            await self.activeCall.wrappedValue?.iceCandidates.append(candidate.toCandidate(nil, nil))
+        }
     }
 
     func peerConnection(_ connection: RTCPeerConnection, didRemove candidates: [WebRTC.RTCIceCandidate]) {
@@ -506,10 +547,9 @@ extension WebRTCClient: RTCPeerConnectionDelegate {
                         lastReceivedMs lastDataReceivedMs: Int32,
                         changeReason reason: String) {
 //        logger.debug("Connection changed candidate \(reason) \(remote.debugDescription) \(remote.description)")
-        sendConnectedEvent(connection, local: local, remote: remote)
     }
 
-    func sendConnectedEvent(_ connection: WebRTC.RTCPeerConnection, local: WebRTC.RTCIceCandidate, remote: WebRTC.RTCIceCandidate) {
+    func sendConnectedEvent(_ connection: WebRTC.RTCPeerConnection) {
         connection.statistics { (stats: RTCStatisticsReport) in
             stats.statistics.values.forEach { stat in
 //                logger.debug("Stat \(stat.debugDescription)")
@@ -517,24 +557,25 @@ extension WebRTCClient: RTCPeerConnectionDelegate {
                    let localId = stat.values["localCandidateId"] as? String,
                    let remoteId = stat.values["remoteCandidateId"] as? String,
                    let localStats = stats.statistics[localId],
-                   let remoteStats = stats.statistics[remoteId],
-                   local.sdp.contains("\((localStats.values["ip"] as? String ?? "--")) \((localStats.values["port"] as? String ?? "--"))") &&
-                   remote.sdp.contains("\((remoteStats.values["ip"] as? String ?? "--")) \((remoteStats.values["port"] as? String ?? "--"))")
+                   let remoteStats = stats.statistics[remoteId]
                 {
                     Task {
                         await self.sendCallResponse(.init(
                             corrId: nil,
                             resp: .connected(connectionInfo: ConnectionInfo(
-                                localCandidate: local.toCandidate(
-                                    RTCIceCandidateType.init(rawValue: localStats.values["candidateType"] as! String),
-                                    localStats.values["protocol"] as? String,
-                                    localStats.values["relayProtocol"] as? String
+                                localCandidate: RTCIceCandidate(
+                                    candidateType: RTCIceCandidateType.init(rawValue: localStats.values["candidateType"] as! String),
+                                    protocol: localStats.values["protocol"] as? String,
+                                    sdpMid: nil,
+                                    sdpMLineIndex: nil,
+                                    candidate: ""
                                 ),
-                                remoteCandidate: remote.toCandidate(
-                                    RTCIceCandidateType.init(rawValue: remoteStats.values["candidateType"] as! String),
-                                    remoteStats.values["protocol"] as? String,
-                                    remoteStats.values["relayProtocol"] as? String
-                                ))),
+                                remoteCandidate: RTCIceCandidate(
+                                    candidateType: RTCIceCandidateType.init(rawValue: remoteStats.values["candidateType"] as! String),
+                                    protocol: remoteStats.values["protocol"] as? String,
+                                    sdpMid: nil,
+                                    sdpMLineIndex: nil,
+                                    candidate: ""))),
                             command: nil)
                         )
                     }
@@ -634,11 +675,10 @@ extension RTCIceCandidate {
 }
 
 extension WebRTC.RTCIceCandidate {
-    func toCandidate(_ candidateType: RTCIceCandidateType?, _ protocol: String?, _ relayProtocol: String?) -> RTCIceCandidate {
+    func toCandidate(_ candidateType: RTCIceCandidateType?, _ protocol: String?) -> RTCIceCandidate {
         RTCIceCandidate(
             candidateType: candidateType,
             protocol: `protocol`,
-            relayProtocol: relayProtocol,
             sdpMid: sdpMid,
             sdpMLineIndex: Int(sdpMLineIndex),
             candidate: sdp

apps/ios/Shared/Views/NewChat/CreateLinkView.swift

@@ -73,6 +73,7 @@ struct CreateLinkView: View {
         Task {
             if let (connReq, pcc) = await apiAddContact(incognito: incognitoGroupDefault.get()) {
                 await MainActor.run {
+                    m.updateContactConnection(pcc)
                     connReqInvitation = connReq
                     contactConnection = pcc
                     m.connReqInv = connReq

apps/ios/Shared/Views/NewChat/NewChatButton.swift

@@ -52,6 +52,9 @@ struct NewChatButton: View {
     func addContactAction() {
         Task {
             if let (connReq, pcc) = await apiAddContact(incognito: incognitoGroupDefault.get()) {
+                await MainActor.run {
+                    ChatModel.shared.updateContactConnection(pcc)
+                }
                 actionSheet = .createLink(link: connReq, connection: pcc)
             }
         }
@@ -346,7 +349,10 @@ private func connectContactViaAddress_(_ contact: Contact, dismiss: Bool, incogn
 
 private func connectViaLink(_ connectionLink: String, connectionPlan: ConnectionPlan?, dismiss: Bool, incognito: Bool) {
     Task {
-        if let connReqType = await apiConnect(incognito: incognito, connReq: connectionLink) {
+        if let (connReqType, pcc) = await apiConnect(incognito: incognito, connReq: connectionLink) {
+            await MainActor.run {
+                ChatModel.shared.updateContactConnection(pcc)
+            }
             let crt: ConnReqType
             if let plan = connectionPlan {
                 crt = planToConnReqType(plan)

apps/ios/Shared/Views/RemoteAccess/ConnectDesktopView.swift

@@ -208,7 +208,7 @@ struct ConnectDesktopView: View {
             Section("Found desktop") {
                 Text("Waiting for desktop...").italic()
                 Button {
-                    disconnectDesktop(.dismiss)
+                    disconnectDesktop()
                 } label: {
                     Label("Scan QR code", systemImage: "qrcode")
                 }

apps/ios/SimpleX.xcodeproj/project.pbxproj

@@ -120,11 +120,11 @@
 		5CCD403727A5F9A200368C90 /* ScanToConnectView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5CCD403627A5F9A200368C90 /* ScanToConnectView.swift */; };
 		5CD67B8F2B0E858A00C510B1 /* hs_init.h in Headers */ = {isa = PBXBuildFile; fileRef = 5CD67B8D2B0E858A00C510B1 /* hs_init.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		5CD67B902B0E858A00C510B1 /* hs_init.c in Sources */ = {isa = PBXBuildFile; fileRef = 5CD67B8E2B0E858A00C510B1 /* hs_init.c */; };
-		5CD67B962B11416700C510B1 /* libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CD67B912B11416600C510B1 /* libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9.a */; };
-		5CD67B972B11416700C510B1 /* libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9-ghc9.6.3.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CD67B922B11416600C510B1 /* libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9-ghc9.6.3.a */; };
-		5CD67B982B11416700C510B1 /* libffi.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CD67B932B11416600C510B1 /* libffi.a */; };
-		5CD67B992B11416700C510B1 /* libgmp.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CD67B942B11416600C510B1 /* libgmp.a */; };
-		5CD67B9A2B11416700C510B1 /* libgmpxx.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CD67B952B11416700C510B1 /* libgmpxx.a */; };
+		5CD67BA02B120ADF00C510B1 /* libgmp.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CD67B9B2B120ADF00C510B1 /* libgmp.a */; };
+		5CD67BA12B120ADF00C510B1 /* libgmpxx.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CD67B9C2B120ADF00C510B1 /* libgmpxx.a */; };
+		5CD67BA22B120ADF00C510B1 /* libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CD67B9D2B120ADF00C510B1 /* libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u.a */; };
+		5CD67BA32B120ADF00C510B1 /* libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u-ghc8.10.7.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CD67B9E2B120ADF00C510B1 /* libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u-ghc8.10.7.a */; };
+		5CD67BA42B120ADF00C510B1 /* libffi.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CD67B9F2B120ADF00C510B1 /* libffi.a */; };
 		5CDCAD482818589900503DA2 /* NotificationService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5CDCAD472818589900503DA2 /* NotificationService.swift */; };
 		5CE2BA702845308900EC33A6 /* SimpleXChat.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 5CE2BA682845308900EC33A6 /* SimpleXChat.framework */; };
 		5CE2BA712845308900EC33A6 /* SimpleXChat.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 5CE2BA682845308900EC33A6 /* SimpleXChat.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
@@ -403,11 +403,11 @@
 		5CCD403627A5F9A200368C90 /* ScanToConnectView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ScanToConnectView.swift; sourceTree = "<group>"; };
 		5CD67B8D2B0E858A00C510B1 /* hs_init.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = hs_init.h; sourceTree = "<group>"; };
 		5CD67B8E2B0E858A00C510B1 /* hs_init.c */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.c; path = hs_init.c; sourceTree = "<group>"; };
-		5CD67B912B11416600C510B1 /* libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = "libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9.a"; sourceTree = "<group>"; };
-		5CD67B922B11416600C510B1 /* libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9-ghc9.6.3.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = "libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9-ghc9.6.3.a"; sourceTree = "<group>"; };
-		5CD67B932B11416600C510B1 /* libffi.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = libffi.a; sourceTree = "<group>"; };
-		5CD67B942B11416600C510B1 /* libgmp.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = libgmp.a; sourceTree = "<group>"; };
-		5CD67B952B11416700C510B1 /* libgmpxx.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = libgmpxx.a; sourceTree = "<group>"; };
+		5CD67B9B2B120ADF00C510B1 /* libgmp.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = libgmp.a; sourceTree = "<group>"; };
+		5CD67B9C2B120ADF00C510B1 /* libgmpxx.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = libgmpxx.a; sourceTree = "<group>"; };
+		5CD67B9D2B120ADF00C510B1 /* libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = "libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u.a"; sourceTree = "<group>"; };
+		5CD67B9E2B120ADF00C510B1 /* libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u-ghc8.10.7.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = "libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u-ghc8.10.7.a"; sourceTree = "<group>"; };
+		5CD67B9F2B120ADF00C510B1 /* libffi.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = libffi.a; sourceTree = "<group>"; };
 		5CDCAD452818589900503DA2 /* SimpleX NSE.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = "SimpleX NSE.appex"; sourceTree = BUILT_PRODUCTS_DIR; };
 		5CDCAD472818589900503DA2 /* NotificationService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationService.swift; sourceTree = "<group>"; };
 		5CDCAD492818589900503DA2 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -511,13 +511,13 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				5CD67B972B11416700C510B1 /* libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9-ghc9.6.3.a in Frameworks */,
+				5CD67BA12B120ADF00C510B1 /* libgmpxx.a in Frameworks */,
+				5CD67BA22B120ADF00C510B1 /* libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u.a in Frameworks */,
 				5CE2BA93284534B000EC33A6 /* libiconv.tbd in Frameworks */,
+				5CD67BA02B120ADF00C510B1 /* libgmp.a in Frameworks */,
+				5CD67BA42B120ADF00C510B1 /* libffi.a in Frameworks */,
+				5CD67BA32B120ADF00C510B1 /* libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u-ghc8.10.7.a in Frameworks */,
 				5CE2BA94284534BB00EC33A6 /* libz.tbd in Frameworks */,
-				5CD67B982B11416700C510B1 /* libffi.a in Frameworks */,
-				5CD67B992B11416700C510B1 /* libgmp.a in Frameworks */,
-				5CD67B962B11416700C510B1 /* libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9.a in Frameworks */,
-				5CD67B9A2B11416700C510B1 /* libgmpxx.a in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -579,11 +579,11 @@
 		5C764E5C279C70B7000C6508 /* Libraries */ = {
 			isa = PBXGroup;
 			children = (
-				5CD67B932B11416600C510B1 /* libffi.a */,
-				5CD67B942B11416600C510B1 /* libgmp.a */,
-				5CD67B952B11416700C510B1 /* libgmpxx.a */,
-				5CD67B922B11416600C510B1 /* libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9-ghc9.6.3.a */,
-				5CD67B912B11416600C510B1 /* libHSsimplex-chat-5.4.0.6-95eerlCBwIgI8jyla1GCr9.a */,
+				5CD67B9F2B120ADF00C510B1 /* libffi.a */,
+				5CD67B9B2B120ADF00C510B1 /* libgmp.a */,
+				5CD67B9C2B120ADF00C510B1 /* libgmpxx.a */,
+				5CD67B9E2B120ADF00C510B1 /* libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u-ghc8.10.7.a */,
+				5CD67B9D2B120ADF00C510B1 /* libHSsimplex-chat-5.4.0.6-9DfazyElTA72omjHp0C93u.a */,
 			);
 			path = Libraries;
 			sourceTree = "<group>";
@@ -1502,7 +1502,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = "SimpleX (iOS).entitlements";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 183;
+				CURRENT_PROJECT_VERSION = 184;
 				DEVELOPMENT_TEAM = 5NN7GUYB6T;
 				ENABLE_BITCODE = NO;
 				ENABLE_PREVIEWS = YES;
@@ -1545,7 +1545,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = "SimpleX (iOS).entitlements";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 183;
+				CURRENT_PROJECT_VERSION = 184;
 				DEVELOPMENT_TEAM = 5NN7GUYB6T;
 				ENABLE_BITCODE = NO;
 				ENABLE_PREVIEWS = YES;
@@ -1626,7 +1626,7 @@
 				CODE_SIGN_ENTITLEMENTS = "SimpleX NSE/SimpleX NSE.entitlements";
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 183;
+				CURRENT_PROJECT_VERSION = 184;
 				DEVELOPMENT_TEAM = 5NN7GUYB6T;
 				ENABLE_BITCODE = NO;
 				GENERATE_INFOPLIST_FILE = YES;
@@ -1658,7 +1658,7 @@
 				CODE_SIGN_ENTITLEMENTS = "SimpleX NSE/SimpleX NSE.entitlements";
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 183;
+				CURRENT_PROJECT_VERSION = 184;
 				DEVELOPMENT_TEAM = 5NN7GUYB6T;
 				ENABLE_BITCODE = NO;
 				GENERATE_INFOPLIST_FILE = YES;
@@ -1690,7 +1690,7 @@
 				APPLICATION_EXTENSION_API_ONLY = YES;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 183;
+				CURRENT_PROJECT_VERSION = 184;
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = 5NN7GUYB6T;
 				DYLIB_COMPATIBILITY_VERSION = 1;
@@ -1736,7 +1736,7 @@
 				APPLICATION_EXTENSION_API_ONLY = YES;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 183;
+				CURRENT_PROJECT_VERSION = 184;
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = 5NN7GUYB6T;
 				DYLIB_COMPATIBILITY_VERSION = 1;

apps/ios/SimpleXChat/APITypes.swift

@@ -505,8 +505,8 @@ public enum ChatResponse: Decodable, Error {
     case invitation(user: UserRef, connReqInvitation: String, connection: PendingContactConnection)
     case connectionIncognitoUpdated(user: UserRef, toConnection: PendingContactConnection)
     case connectionPlan(user: UserRef, connectionPlan: ConnectionPlan)
-    case sentConfirmation(user: UserRef)
-    case sentInvitation(user: UserRef)
+    case sentConfirmation(user: UserRef, connection: PendingContactConnection)
+    case sentInvitation(user: UserRef, connection: PendingContactConnection)
     case sentInvitationToContact(user: UserRef, contact: Contact, customUserProfile: Profile?)
     case contactAlreadyExists(user: UserRef, contact: Contact)
     case contactRequestAlreadyAccepted(user: UserRef, contact: Contact)
@@ -605,7 +605,6 @@ public enum ChatResponse: Decodable, Error {
     case ntfTokenStatus(status: NtfTknStatus)
     case ntfToken(token: DeviceToken, status: NtfTknStatus, ntfMode: NotificationsMode)
     case ntfMessages(user_: User?, connEntity: ConnectionEntity?, msgTs: Date?, ntfMessages: [NtfMsgInfo])
-    case newContactConnection(user: UserRef, connection: PendingContactConnection)
     case contactConnectionDeleted(user: UserRef, connection: PendingContactConnection)
     // remote desktop responses/events
     case remoteCtrlList(remoteCtrls: [RemoteCtrlInfo])
@@ -613,7 +612,7 @@ public enum ChatResponse: Decodable, Error {
     case remoteCtrlConnecting(remoteCtrl_: RemoteCtrlInfo?, ctrlAppInfo: CtrlAppInfo, appVersion: String)
     case remoteCtrlSessionCode(remoteCtrl_: RemoteCtrlInfo?, sessionCode: String)
     case remoteCtrlConnected(remoteCtrl: RemoteCtrlInfo)
-    case remoteCtrlStopped
+    case remoteCtrlStopped(rcsState: RemoteCtrlSessionState, rcStopReason: RemoteCtrlStopReason)
     // misc
     case versionInfo(versionInfo: CoreVersionInfo, chatMigrations: [UpMigration], agentMigrations: [UpMigration])
     case cmdOk(user: UserRef?)
@@ -752,7 +751,6 @@ public enum ChatResponse: Decodable, Error {
             case .ntfTokenStatus: return "ntfTokenStatus"
             case .ntfToken: return "ntfToken"
             case .ntfMessages: return "ntfMessages"
-            case .newContactConnection: return "newContactConnection"
             case .contactConnectionDeleted: return "contactConnectionDeleted"
             case .remoteCtrlList: return "remoteCtrlList"
             case .remoteCtrlFound: return "remoteCtrlFound"
@@ -803,11 +801,11 @@ public enum ChatResponse: Decodable, Error {
             case let .contactCode(u, contact, connectionCode): return withUser(u, "contact: \(String(describing: contact))\nconnectionCode: \(connectionCode)")
             case let .groupMemberCode(u, groupInfo, member, connectionCode): return withUser(u, "groupInfo: \(String(describing: groupInfo))\nmember: \(String(describing: member))\nconnectionCode: \(connectionCode)")
             case let .connectionVerified(u, verified, expectedCode): return withUser(u, "verified: \(verified)\nconnectionCode: \(expectedCode)")
-            case let .invitation(u, connReqInvitation, _): return withUser(u, connReqInvitation)
+            case let .invitation(u, connReqInvitation, connection): return withUser(u, "connReqInvitation: \(connReqInvitation)\nconnection: \(connection)")
             case let .connectionIncognitoUpdated(u, toConnection): return withUser(u, String(describing: toConnection))
             case let .connectionPlan(u, connectionPlan): return withUser(u, String(describing: connectionPlan))
-            case .sentConfirmation: return noDetails
-            case .sentInvitation: return noDetails
+            case let .sentConfirmation(u, connection): return withUser(u, String(describing: connection))
+            case let .sentInvitation(u, connection): return withUser(u, String(describing: connection))
             case let .sentInvitationToContact(u, contact, _): return withUser(u, String(describing: contact))
             case let .contactAlreadyExists(u, contact): return withUser(u, String(describing: contact))
             case let .contactRequestAlreadyAccepted(u, contact): return withUser(u, String(describing: contact))
@@ -900,7 +898,6 @@ public enum ChatResponse: Decodable, Error {
             case let .ntfTokenStatus(status): return String(describing: status)
             case let .ntfToken(token, status, ntfMode): return "token: \(token)\nstatus: \(status.rawValue)\nntfMode: \(ntfMode.rawValue)"
             case let .ntfMessages(u, connEntity, msgTs, ntfMessages): return withUser(u, "connEntity: \(String(describing: connEntity))\nmsgTs: \(String(describing: msgTs))\nntfMessages: \(String(describing: ntfMessages))")
-            case let .newContactConnection(u, connection): return withUser(u, String(describing: connection))
             case let .contactConnectionDeleted(u, connection): return withUser(u, String(describing: connection))
             case let .remoteCtrlList(remoteCtrls): return String(describing: remoteCtrls)
             case let .remoteCtrlFound(remoteCtrl, ctrlAppInfo_, appVersion, compatible): return "remoteCtrl:\n\(String(describing: remoteCtrl))\nctrlAppInfo_:\n\(String(describing: ctrlAppInfo_))\nappVersion: \(appVersion)\ncompatible: \(compatible)"
@@ -1552,6 +1549,13 @@ public enum RemoteCtrlSessionState: Decodable {
     case connected(sessionCode: String)
 }
 
+public enum RemoteCtrlStopReason: Decodable {
+    case discoveryFailed(chatError: ChatError)
+    case connectionFailed(chatError: ChatError)
+    case setupFailed(chatError: ChatError)
+    case disconnected
+}
+
 public struct CtrlAppInfo: Decodable {
     public var appVersionRange: AppVersionRange
     public var deviceName: String

apps/multiplatform/android/src/main/java/chat/simplex/app/SimplexApp.kt

@@ -75,7 +75,7 @@ class SimplexApp: Application(), LifecycleEventObserver {
         }
         Lifecycle.Event.ON_RESUME -> {
           isAppOnForeground = true
-          if (chatModel.controller.appPrefs.onboardingStage.get() == OnboardingStage.OnboardingComplete) {
+          if (chatModel.controller.appPrefs.onboardingStage.get() == OnboardingStage.OnboardingComplete && chatModel.currentUser.value != null) {
             SimplexService.showBackgroundServiceNoticeIfNeeded()
           }
           /**

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/views/call/CallView.android.kt

@@ -370,7 +370,6 @@ fun CallInfoView(call: Call, alignment: Alignment.Horizontal) {
     InfoText(call.callState.text)
 
     val connInfo = call.connectionInfo
-    //    val connInfoText = if (connInfo == null) ""  else " (${connInfo.text}, ${connInfo.protocolText})"
     val connInfoText = if (connInfo == null) ""  else " (${connInfo.text})"
     InfoText(call.encryptionStatus + connInfoText)
   }
@@ -585,8 +584,8 @@ fun PreviewActiveCallOverlayVideo() {
         localMedia = CallMediaType.Video,
         peerMedia = CallMediaType.Video,
         connectionInfo = ConnectionInfo(
-          RTCIceCandidate(RTCIceCandidateType.Host, "tcp", null),
-          RTCIceCandidate(RTCIceCandidateType.Host, "tcp", null)
+          RTCIceCandidate(RTCIceCandidateType.Host, "tcp"),
+          RTCIceCandidate(RTCIceCandidateType.Host, "tcp")
         )
       ),
       speakerCanBeEnabled = true,
@@ -611,8 +610,8 @@ fun PreviewActiveCallOverlayAudio() {
         localMedia = CallMediaType.Audio,
         peerMedia = CallMediaType.Audio,
         connectionInfo = ConnectionInfo(
-          RTCIceCandidate(RTCIceCandidateType.Host, "udp", null),
-          RTCIceCandidate(RTCIceCandidateType.Host, "udp", null)
+          RTCIceCandidate(RTCIceCandidateType.Host, "udp"),
+          RTCIceCandidate(RTCIceCandidateType.Host, "udp")
         )
       ),
       speakerCanBeEnabled = true,

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/views/onboarding/SimpleXInfo.android.kt

@@ -0,0 +1,15 @@
+package chat.simplex.common.views.onboarding
+
+import androidx.compose.runtime.Composable
+import chat.simplex.common.model.SharedPreference
+import chat.simplex.common.model.User
+import chat.simplex.res.MR
+
+@Composable
+actual fun OnboardingActionButton(user: User?, onboardingStage: SharedPreference<OnboardingStage>, onclick: (() -> Unit)?) {
+  if (user == null) {
+    OnboardingActionButton(MR.strings.create_your_profile, onboarding = OnboardingStage.Step2_CreateProfile, true, onclick = onclick)
+  } else {
+    OnboardingActionButton(MR.strings.make_private_connection, onboarding = OnboardingStage.OnboardingComplete, true, onclick = onclick)
+  }
+}

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/App.kt

@@ -37,8 +37,7 @@ import kotlinx.coroutines.flow.*
 
 data class SettingsViewState(
   val userPickerState: MutableStateFlow<AnimatedViewState>,
-  val scaffoldState: ScaffoldState,
-  val switchingUsersAndHosts: MutableState<Boolean>
+  val scaffoldState: ScaffoldState
 )
 
 @Composable
@@ -102,11 +101,8 @@ fun MainScreen() {
   }
 
   Box {
-    var onboarding by remember { mutableStateOf(chatModel.controller.appPrefs.onboardingStage.get()) }
-    LaunchedEffect(Unit) {
-      snapshotFlow { chatModel.controller.appPrefs.onboardingStage.state.value }.distinctUntilChanged().collect { onboarding = it }
-    }
-    val userCreated = chatModel.userCreated.value
+    val onboarding by remember { chatModel.controller.appPrefs.onboardingStage.state }
+    val localUserCreated = chatModel.localUserCreated.value
     var showInitializationView by remember { mutableStateOf(false) }
     when {
       chatModel.chatDbStatus.value == null && showInitializationView -> InitializationView()
@@ -115,14 +111,18 @@ fun MainScreen() {
           DatabaseErrorView(chatModel.chatDbStatus, chatModel.controller.appPrefs)
         }
       }
-      remember { chatModel.chatDbEncrypted }.value == null || userCreated == null -> SplashView()
-      onboarding == OnboardingStage.OnboardingComplete && userCreated -> {
+      remember { chatModel.chatDbEncrypted }.value == null || localUserCreated == null -> SplashView()
+      onboarding == OnboardingStage.OnboardingComplete -> {
         Box {
           showAdvertiseLAAlert = true
-          val userPickerState by rememberSaveable(stateSaver = AnimatedViewState.saver()) { mutableStateOf(MutableStateFlow(AnimatedViewState.GONE)) }
+          val userPickerState by rememberSaveable(stateSaver = AnimatedViewState.saver()) { mutableStateOf(MutableStateFlow(if (chatModel.desktopNoUserNoRemote()) AnimatedViewState.VISIBLE else AnimatedViewState.GONE)) }
+          KeyChangeEffect(chatModel.desktopNoUserNoRemote) {
+            if (chatModel.desktopNoUserNoRemote() && !ModalManager.start.hasModalsOpen()) {
+              userPickerState.value = AnimatedViewState.VISIBLE
+            }
+          }
           val scaffoldState = rememberScaffoldState()
-          val switchingUsersAndHosts = rememberSaveable { mutableStateOf(false) }
-          val settingsState = remember { SettingsViewState(userPickerState, scaffoldState, switchingUsersAndHosts) }
+          val settingsState = remember { SettingsViewState(userPickerState, scaffoldState) }
           if (appPlatform.isAndroid) {
             AndroidScreen(settingsState)
           } else {
@@ -137,12 +137,14 @@ fun MainScreen() {
         }
       }
       onboarding == OnboardingStage.Step2_CreateProfile -> CreateFirstProfile(chatModel) {}
+      onboarding == OnboardingStage.LinkAMobile -> LinkAMobile()
       onboarding == OnboardingStage.Step2_5_SetupDatabasePassphrase -> SetupDatabasePassphrase(chatModel)
       onboarding == OnboardingStage.Step3_CreateSimpleXAddress -> CreateSimpleXAddress(chatModel, null)
       onboarding == OnboardingStage.Step4_SetNotificationsMode -> SetNotificationsMode(chatModel)
     }
     if (appPlatform.isAndroid) {
       ModalManager.fullscreen.showInView()
+      SwitchingUsersView()
     }
 
     val unauthorized = remember { derivedStateOf { AppLock.userAuthorized.value != true } }
@@ -262,7 +264,7 @@ fun CenterPartOfScreen() {
             .background(MaterialTheme.colors.background),
           contentAlignment = Alignment.Center
         ) {
-          Text(stringResource(MR.strings.no_selected_chat))
+          Text(stringResource(if (chatModel.desktopNoUserNoRemote) MR.strings.no_connected_mobile else MR.strings.no_selected_chat))
         }
       } else {
         ModalManager.center.showInView()
@@ -286,6 +288,7 @@ fun DesktopScreen(settingsState: SettingsViewState) {
     }
     Box(Modifier.widthIn(max = DEFAULT_START_MODAL_WIDTH)) {
       ModalManager.start.showInView()
+      SwitchingUsersView()
     }
     Row(Modifier.padding(start = DEFAULT_START_MODAL_WIDTH).clipToBounds()) {
       Box(Modifier.widthIn(min = DEFAULT_MIN_CENTER_MODAL_WIDTH).weight(1f)) {
@@ -298,7 +301,7 @@ fun DesktopScreen(settingsState: SettingsViewState) {
         EndPartOfScreen()
       }
     }
-    val (userPickerState, scaffoldState, switchingUsersAndHosts ) = settingsState
+    val (userPickerState, scaffoldState ) = settingsState
     val scope = rememberCoroutineScope()
     if (scaffoldState.drawerState.isOpen) {
       Box(
@@ -312,7 +315,7 @@ fun DesktopScreen(settingsState: SettingsViewState) {
       )
     }
     VerticalDivider(Modifier.padding(start = DEFAULT_START_MODAL_WIDTH))
-    UserPicker(chatModel, userPickerState, switchingUsersAndHosts) {
+    UserPicker(chatModel, userPickerState) {
       scope.launch { if (scaffoldState.drawerState.isOpen) scaffoldState.drawerState.close() else scaffoldState.drawerState.open() }
       userPickerState.value = AnimatedViewState.GONE
     }
@@ -335,3 +338,26 @@ fun InitializationView() {
     }
   }
 }
+
+@Composable
+private fun SwitchingUsersView() {
+  if (remember { chatModel.switchingUsersAndHosts }.value) {
+    Box(
+      Modifier.fillMaxSize().clickable(enabled = false, onClick = {}),
+      contentAlignment = Alignment.Center
+    ) {
+      ProgressIndicator()
+    }
+  }
+}
+
+@Composable
+private fun ProgressIndicator() {
+  CircularProgressIndicator(
+    Modifier
+      .padding(horizontal = 2.dp)
+      .size(30.dp),
+    color = MaterialTheme.colors.secondary,
+    strokeWidth = 2.5.dp
+  )
+}

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/model/ChatModel.kt

@@ -2,7 +2,7 @@ package chat.simplex.common.model
 
 import androidx.compose.material.*
 import androidx.compose.runtime.*
-import androidx.compose.runtime.snapshots.SnapshotStateList
+import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.snapshots.SnapshotStateMap
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.SpanStyle
@@ -43,7 +43,7 @@ object ChatModel {
   val setDeliveryReceipts = mutableStateOf(false)
   val currentUser = mutableStateOf<User?>(null)
   val users = mutableStateListOf<UserInfo>()
-  val userCreated = mutableStateOf<Boolean?>(null)
+  val localUserCreated = mutableStateOf<Boolean?>(null)
   val chatRunning = mutableStateOf<Boolean?>(null)
   val chatDbChanged = mutableStateOf<Boolean>(false)
   val chatDbEncrypted = mutableStateOf<Boolean?>(false)
@@ -51,6 +51,7 @@ object ChatModel {
   val chats = mutableStateListOf<Chat>()
   // map of connections network statuses, key is agent connection id
   val networkStatuses = mutableStateMapOf<String, NetworkStatus>()
+  val switchingUsersAndHosts = mutableStateOf(false)
 
   // current chat
   val chatId = mutableStateOf<String?>(null)
@@ -108,6 +109,9 @@ object ChatModel {
 
   var updatingChatsMutex: Mutex = Mutex()
 
+  val desktopNoUserNoRemote: Boolean @Composable get() = appPlatform.isDesktop && currentUser.value == null && currentRemoteHost.value == null
+  fun desktopNoUserNoRemote(): Boolean = appPlatform.isDesktop && currentUser.value == null && currentRemoteHost.value == null
+
   // remote controller
   val remoteHosts = mutableStateListOf<RemoteHostInfo>()
   val currentRemoteHost = mutableStateOf<RemoteHostInfo?>(null)
@@ -222,8 +226,23 @@ object ChatModel {
     val chat: Chat
     if (i >= 0) {
       chat = chats[i]
+      val newPreviewItem = when (cInfo) {
+        is ChatInfo.Group -> {
+          val currentPreviewItem = chat.chatItems.firstOrNull()
+          if (currentPreviewItem != null) {
+            if (cItem.meta.itemTs >= currentPreviewItem.meta.itemTs) {
+              cItem
+            } else {
+              currentPreviewItem
+            }
+          } else {
+            cItem
+          }
+        }
+        else -> cItem
+      }
       chats[i] = chat.copy(
-        chatItems = arrayListOf(cItem),
+        chatItems = arrayListOf(newPreviewItem),
         chatStats =
           if (cItem.meta.itemStatus is CIStatus.RcvNew) {
             val minUnreadId = if(chat.chatStats.minUnreadItemId == 0L) cItem.id else chat.chatStats.minUnreadItemId
@@ -605,6 +624,7 @@ object ChatModel {
     terminalItems.add(item)
   }
 
+  val connectedToRemote: Boolean @Composable get() = currentRemoteHost.value != null || remoteCtrlSession.value?.active == true
   fun connectedToRemote(): Boolean = currentRemoteHost.value != null || remoteCtrlSession.value?.active == true
 }
 
@@ -2945,6 +2965,14 @@ sealed class RemoteCtrlSessionState {
   @Serializable @SerialName("connected") data class Connected(val sessionCode: String): RemoteCtrlSessionState()
 }
 
+@Serializable
+sealed class RemoteCtrlStopReason {
+  @Serializable @SerialName("discoveryFailed") class DiscoveryFailed(val chatError: ChatError): RemoteCtrlStopReason()
+  @Serializable @SerialName("connectionFailed") class ConnectionFailed(val chatError: ChatError): RemoteCtrlStopReason()
+  @Serializable @SerialName("setupFailed") class SetupFailed(val chatError: ChatError): RemoteCtrlStopReason()
+  @Serializable @SerialName("disconnected") object Disconnected: RemoteCtrlStopReason()
+}
+
 sealed class UIRemoteCtrlSessionState {
   object Starting: UIRemoteCtrlSessionState()
   object Searching: UIRemoteCtrlSessionState()

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/model/SimpleXAPI.kt

@@ -173,6 +173,8 @@ class AppPreferences {
   val connectRemoteViaMulticastAuto = mkBoolPreference(SHARED_PREFS_CONNECT_REMOTE_VIA_MULTICAST_AUTO, true)
   val offerRemoteMulticast = mkBoolPreference(SHARED_PREFS_OFFER_REMOTE_MULTICAST, true)
 
+  val desktopWindowState = mkStrPreference(SHARED_PREFS_DESKTOP_WINDOW_STATE, null)
+  
   private fun mkIntPreference(prefName: String, default: Int) =
     SharedPreference(
       get = fun() = settings.getInt(prefName, default),
@@ -317,6 +319,7 @@ class AppPreferences {
     private const val SHARED_PREFS_CONNECT_REMOTE_VIA_MULTICAST = "ConnectRemoteViaMulticast"
     private const val SHARED_PREFS_CONNECT_REMOTE_VIA_MULTICAST_AUTO = "ConnectRemoteViaMulticastAuto"
     private const val SHARED_PREFS_OFFER_REMOTE_MULTICAST = "OfferRemoteMulticast"
+    private const val SHARED_PREFS_DESKTOP_WINDOW_STATE = "DesktopWindowState"
   }
 }
 
@@ -359,7 +362,7 @@ object ChatController {
       chatModel.users.addAll(users)
       if (justStarted) {
         chatModel.currentUser.value = user
-        chatModel.userCreated.value = true
+        chatModel.localUserCreated.value = true
         getUserChatData(null)
         appPrefs.chatLastStart.set(Clock.System.now())
         chatModel.chatRunning.value = true
@@ -379,6 +382,31 @@ object ChatController {
     }
   }
 
+  suspend fun startChatWithoutUser() {
+    Log.d(TAG, "user: null")
+    try {
+      if (chatModel.chatRunning.value == true) return
+      apiSetTempFolder(coreTmpDir.absolutePath)
+      apiSetFilesFolder(appFilesDir.absolutePath)
+      if (appPlatform.isDesktop) {
+        apiSetRemoteHostsFolder(remoteHostsDir.absolutePath)
+      }
+      apiSetXFTPConfig(getXFTPCfg())
+      apiSetEncryptLocalFiles(appPrefs.privacyEncryptLocalFiles.get())
+      chatModel.users.clear()
+      chatModel.currentUser.value = null
+      chatModel.localUserCreated.value = false
+      appPrefs.chatLastStart.set(Clock.System.now())
+      chatModel.chatRunning.value = true
+      startReceiver()
+      setLocalDeviceName(appPrefs.deviceNameForRemoteAccess.get()!!)
+      Log.d(TAG, "startChat: started without user")
+    } catch (e: Error) {
+      Log.e(TAG, "failed starting chat without user $e")
+      throw e
+    }
+  }
+
   suspend fun changeActiveUser(rhId: Long?, toUserId: Long, viewPwd: String?) {
     try {
       changeActiveUser_(rhId, toUserId, viewPwd)
@@ -402,8 +430,9 @@ object ChatController {
   }
 
   suspend fun getUserChatData(rhId: Long?) {
-    chatModel.userAddress.value = apiGetUserAddress(rhId)
-    chatModel.chatItemTTL.value = getChatItemTTL(rhId)
+    val hasUser = chatModel.currentUser.value != null
+    chatModel.userAddress.value = if (hasUser) apiGetUserAddress(rhId) else null
+    chatModel.chatItemTTL.value = if (hasUser) getChatItemTTL(rhId) else ChatItemTTL.None
     updatingChatsMutex.withLock {
       val chats = apiGetChats(rhId)
       chatModel.updateChats(chats)
@@ -472,7 +501,9 @@ object ChatController {
     val r = sendCmd(rh, CC.ShowActiveUser())
     if (r is CR.ActiveUser) return r.user.updateRemoteHostId(rh)
     Log.d(TAG, "apiGetActiveUser: ${r.responseType} ${r.details}")
-    chatModel.userCreated.value = false
+    if (rh == null) {
+      chatModel.localUserCreated.value = false
+    }
     return null
   }
 
@@ -891,20 +922,21 @@ object ChatController {
     return null
   }
 
-  suspend fun apiConnect(rh: Long?, incognito: Boolean, connReq: String): Boolean  {
+  suspend fun apiConnect(rh: Long?, incognito: Boolean, connReq: String): PendingContactConnection?  {
     val userId = chatModel.currentUser.value?.userId ?: run {
       Log.e(TAG, "apiConnect: no current user")
-      return false
+      return null
     }
     val r = sendCmd(rh, CC.APIConnect(userId, incognito, connReq))
     when {
-      r is CR.SentConfirmation || r is CR.SentInvitation -> return true
+      r is CR.SentConfirmation -> return r.connection
+      r is CR.SentInvitation -> return r.connection
       r is CR.ContactAlreadyExists -> {
         AlertManager.shared.showAlertMsg(
           generalGetString(MR.strings.contact_already_exists),
           String.format(generalGetString(MR.strings.you_are_already_connected_to_vName_via_this_link), r.contact.displayName)
         )
-        return false
+        return null
       }
       r is CR.ChatCmdError && r.chatError is ChatError.ChatErrorChat
           && r.chatError.errorType is ChatErrorType.InvalidConnReq -> {
@@ -912,7 +944,7 @@ object ChatController {
           generalGetString(MR.strings.invalid_connection_link),
           generalGetString(MR.strings.please_check_correct_link_and_maybe_ask_for_a_new_one)
         )
-        return false
+        return null
       }
       r is CR.ChatCmdError && r.chatError is ChatError.ChatErrorAgent
           && r.chatError.agentError is AgentErrorType.SMP
@@ -921,13 +953,13 @@ object ChatController {
           generalGetString(MR.strings.connection_error_auth),
           generalGetString(MR.strings.connection_error_auth_desc)
         )
-        return false
+        return null
       }
       else -> {
         if (!(networkErrorAlert(r))) {
           apiErrorAlert("apiConnect", generalGetString(MR.strings.connection_error), r)
         }
-        return false
+        return null
       }
     }
   }
@@ -1526,16 +1558,6 @@ object ChatController {
     fun active(user: UserLike): Boolean = activeUser(rhId, user)
     chatModel.addTerminalItem(TerminalItem.resp(rhId, r))
     when (r) {
-      is CR.NewContactConnection -> {
-        if (active(r.user)) {
-          chatModel.updateContactConnection(rhId, r.connection)
-        }
-      }
-      is CR.ContactConnectionDeleted -> {
-        if (active(r.user)) {
-          chatModel.removeChat(rhId, r.connection.id)
-        }
-      }
       is CR.ContactDeletedByContact -> {
         if (active(r.user) && r.contact.directOrUsed) {
           chatModel.updateContact(rhId, r.contact)
@@ -1996,7 +2018,7 @@ object ChatController {
     chatModel.setContactNetworkStatus(contact, NetworkStatus.Error(err))
   }
 
-  suspend fun switchUIRemoteHost(rhId: Long?) {
+  suspend fun switchUIRemoteHost(rhId: Long?) = showProgressIfNeeded {
     // TODO lock the switch so that two switches can't run concurrently?
     chatModel.chatId.value = null
     ModalManager.center.closeModals()
@@ -2009,7 +2031,10 @@ object ChatController {
     chatModel.users.clear()
     chatModel.users.addAll(users)
     chatModel.currentUser.value = user
-    chatModel.userCreated.value = true
+    if (user == null) {
+      chatModel.chatItems.clear()
+      chatModel.chats.clear()
+    }
     val statuses = apiGetNetworkStatuses(rhId)
     if (statuses != null) {
       chatModel.networkStatuses.clear()
@@ -2019,6 +2044,23 @@ object ChatController {
     getUserChatData(rhId)
   }
 
+  suspend fun showProgressIfNeeded(block: suspend () -> Unit) {
+    val job = withBGApi {
+      try {
+        delay(500)
+        chatModel.switchingUsersAndHosts.value = true
+      } catch (e: Throwable) {
+        chatModel.switchingUsersAndHosts.value = false
+      }
+    }
+    try {
+      block()
+    } finally {
+      job.cancel()
+      chatModel.switchingUsersAndHosts.value = false
+    }
+  }
+
   fun getXFTPCfg(): XFTPFileConfig {
     return XFTPFileConfig(minFileSize = 0)
   }
@@ -3581,6 +3623,13 @@ sealed class RemoteHostSessionState {
   @Serializable @SerialName("connected") data class Connected(val sessionCode: String): RemoteHostSessionState()
 }
 
+@Serializable
+sealed class RemoteHostStopReason {
+  @Serializable @SerialName("connectionFailed") data class ConnectionFailed(val chatError: ChatError): RemoteHostStopReason()
+  @Serializable @SerialName("crashed") data class Crashed(val chatError: ChatError): RemoteHostStopReason()
+  @Serializable @SerialName("disconnected") object Disconnected: RemoteHostStopReason()
+}
+
 val json = Json {
   prettyPrint = true
   ignoreUnknownKeys = true
@@ -3700,8 +3749,8 @@ sealed class CR {
   @Serializable @SerialName("invitation") class Invitation(val user: UserRef, val connReqInvitation: String, val connection: PendingContactConnection): CR()
   @Serializable @SerialName("connectionIncognitoUpdated") class ConnectionIncognitoUpdated(val user: UserRef, val toConnection: PendingContactConnection): CR()
   @Serializable @SerialName("connectionPlan") class CRConnectionPlan(val user: UserRef, val connectionPlan: ConnectionPlan): CR()
-  @Serializable @SerialName("sentConfirmation") class SentConfirmation(val user: UserRef): CR()
-  @Serializable @SerialName("sentInvitation") class SentInvitation(val user: UserRef): CR()
+  @Serializable @SerialName("sentConfirmation") class SentConfirmation(val user: UserRef, val connection: PendingContactConnection): CR()
+  @Serializable @SerialName("sentInvitation") class SentInvitation(val user: UserRef, val connection: PendingContactConnection): CR()
   @Serializable @SerialName("sentInvitationToContact") class SentInvitationToContact(val user: UserRef, val contact: Contact, val customUserProfile: Profile?): CR()
   @Serializable @SerialName("contactAlreadyExists") class ContactAlreadyExists(val user: UserRef, val contact: Contact): CR()
   @Serializable @SerialName("contactRequestAlreadyAccepted") class ContactRequestAlreadyAccepted(val user: UserRef, val contact: Contact): CR()
@@ -3795,7 +3844,6 @@ sealed class CR {
   @Serializable @SerialName("callAnswer") class CallAnswer(val user: UserRef, val contact: Contact, val answer: WebRTCSession): CR()
   @Serializable @SerialName("callExtraInfo") class CallExtraInfo(val user: UserRef, val contact: Contact, val extraInfo: WebRTCExtraInfo): CR()
   @Serializable @SerialName("callEnded") class CallEnded(val user: UserRef, val contact: Contact): CR()
-  @Serializable @SerialName("newContactConnection") class NewContactConnection(val user: UserRef, val connection: PendingContactConnection): CR()
   @Serializable @SerialName("contactConnectionDeleted") class ContactConnectionDeleted(val user: UserRef, val connection: PendingContactConnection): CR()
   // remote events (desktop)
   @Serializable @SerialName("remoteHostList") class RemoteHostList(val remoteHosts: List<RemoteHostInfo>): CR()
@@ -3804,7 +3852,7 @@ sealed class CR {
   @Serializable @SerialName("remoteHostSessionCode") class RemoteHostSessionCode(val remoteHost_: RemoteHostInfo?, val sessionCode: String): CR()
   @Serializable @SerialName("newRemoteHost") class NewRemoteHost(val remoteHost: RemoteHostInfo): CR()
   @Serializable @SerialName("remoteHostConnected") class RemoteHostConnected(val remoteHost: RemoteHostInfo): CR()
-  @Serializable @SerialName("remoteHostStopped") class RemoteHostStopped(val remoteHostId_: Long?): CR()
+  @Serializable @SerialName("remoteHostStopped") class RemoteHostStopped(val remoteHostId_: Long?, val rhsState: RemoteHostSessionState, val rhStopReason: RemoteHostStopReason): CR()
   @Serializable @SerialName("remoteFileStored") class RemoteFileStored(val remoteHostId: Long, val remoteFileSource: CryptoFile): CR()
   // remote events (mobile)
   @Serializable @SerialName("remoteCtrlList") class RemoteCtrlList(val remoteCtrls: List<RemoteCtrlInfo>): CR()
@@ -3812,7 +3860,7 @@ sealed class CR {
   @Serializable @SerialName("remoteCtrlConnecting") class RemoteCtrlConnecting(val remoteCtrl_: RemoteCtrlInfo?, val ctrlAppInfo: CtrlAppInfo, val appVersion: String): CR()
   @Serializable @SerialName("remoteCtrlSessionCode") class RemoteCtrlSessionCode(val remoteCtrl_: RemoteCtrlInfo?, val sessionCode: String): CR()
   @Serializable @SerialName("remoteCtrlConnected") class RemoteCtrlConnected(val remoteCtrl: RemoteCtrlInfo): CR()
-  @Serializable @SerialName("remoteCtrlStopped") class RemoteCtrlStopped(): CR()
+  @Serializable @SerialName("remoteCtrlStopped") class RemoteCtrlStopped(val rcsState: RemoteCtrlSessionState, val rcStopReason: RemoteCtrlStopReason): CR()
   @Serializable @SerialName("versionInfo") class VersionInfo(val versionInfo: CoreVersionInfo, val chatMigrations: List<UpMigration>, val agentMigrations: List<UpMigration>): CR()
   @Serializable @SerialName("cmdOk") class CmdOk(val user: UserRef?): CR()
   @Serializable @SerialName("chatCmdError") class ChatCmdError(val user_: UserRef?, val chatError: ChatError): CR()
@@ -3944,7 +3992,6 @@ sealed class CR {
     is CallAnswer -> "callAnswer"
     is CallExtraInfo -> "callExtraInfo"
     is CallEnded -> "callEnded"
-    is NewContactConnection -> "newContactConnection"
     is ContactConnectionDeleted -> "contactConnectionDeleted"
     is RemoteHostList -> "remoteHostList"
     is CurrentRemoteHost -> "currentRemoteHost"
@@ -3999,11 +4046,11 @@ sealed class CR {
     is ContactCode -> withUser(user, "contact: ${json.encodeToString(contact)}\nconnectionCode: $connectionCode")
     is GroupMemberCode -> withUser(user, "groupInfo: ${json.encodeToString(groupInfo)}\nmember: ${json.encodeToString(member)}\nconnectionCode: $connectionCode")
     is ConnectionVerified -> withUser(user, "verified: $verified\nconnectionCode: $expectedCode")
-    is Invitation -> withUser(user, connReqInvitation)
+    is Invitation -> withUser(user, "connReqInvitation: $connReqInvitation\nconnection: $connection")
     is ConnectionIncognitoUpdated -> withUser(user, json.encodeToString(toConnection))
     is CRConnectionPlan -> withUser(user, json.encodeToString(connectionPlan))
-    is SentConfirmation -> withUser(user, noDetails())
-    is SentInvitation -> withUser(user, noDetails())
+    is SentConfirmation -> withUser(user, json.encodeToString(connection))
+    is SentInvitation -> withUser(user, json.encodeToString(connection))
     is SentInvitationToContact -> withUser(user, json.encodeToString(contact))
     is ContactAlreadyExists -> withUser(user, json.encodeToString(contact))
     is ContactRequestAlreadyAccepted -> withUser(user, json.encodeToString(contact))
@@ -4091,7 +4138,6 @@ sealed class CR {
     is CallAnswer -> withUser(user, "contact: ${contact.id}\nanswer: ${json.encodeToString(answer)}")
     is CallExtraInfo -> withUser(user, "contact: ${contact.id}\nextraInfo: ${json.encodeToString(extraInfo)}")
     is CallEnded -> withUser(user, "contact: ${contact.id}")
-    is NewContactConnection -> withUser(user, json.encodeToString(connection))
     is ContactConnectionDeleted -> withUser(user, json.encodeToString(connection))
     // remote events (mobile)
     is RemoteHostList -> json.encodeToString(remoteHosts)

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/Core.kt

@@ -55,10 +55,22 @@ suspend fun initChatController(useKey: String? = null, confirmMigrations: Migrat
     if (appPreferences.encryptionStartedAt.get() != null) appPreferences.encryptionStartedAt.set(null)
     val user = chatController.apiGetActiveUser(null)
     if (user == null) {
-      chatModel.controller.appPrefs.onboardingStage.set(OnboardingStage.Step1_SimpleXInfo)
       chatModel.controller.appPrefs.privacyDeliveryReceiptsSet.set(true)
       chatModel.currentUser.value = null
       chatModel.users.clear()
+      if (appPlatform.isDesktop) {
+        /**
+         * Setting it here to null because otherwise the screen will flash in [MainScreen] after the first start
+         * because of default value of [OnboardingStage.OnboardingComplete]
+         * */
+        chatModel.localUserCreated.value = null
+        if (chatController.listRemoteHosts()?.isEmpty() == true) {
+          chatController.appPrefs.onboardingStage.set(OnboardingStage.Step1_SimpleXInfo)
+        }
+        chatController.startChatWithoutUser()
+      } else {
+        chatController.appPrefs.onboardingStage.set(OnboardingStage.Step1_SimpleXInfo)
+      }
     } else {
       val savedOnboardingStage = appPreferences.onboardingStage.get()
       appPreferences.onboardingStage.set(if (listOf(OnboardingStage.Step1_SimpleXInfo, OnboardingStage.Step2_CreateProfile).contains(savedOnboardingStage) && chatModel.users.size == 1) {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/NtfManager.kt

@@ -59,7 +59,9 @@ abstract class NtfManager {
       awaitChatStartedIfNeeded(chatModel)
       if (userId != null && userId != chatModel.currentUser.value?.userId && chatModel.currentUser.value != null) {
         // TODO include remote host ID in desktop notifications?
-        chatModel.controller.changeActiveUser(null, userId, null)
+        chatModel.controller.showProgressIfNeeded {
+          chatModel.controller.changeActiveUser(null, userId, null)
+        }
       }
       val cInfo = chatModel.getChat(chatId)?.chatInfo
       chatModel.clearOverlays.value = true
@@ -72,7 +74,9 @@ abstract class NtfManager {
       awaitChatStartedIfNeeded(chatModel)
       if (userId != null && userId != chatModel.currentUser.value?.userId && chatModel.currentUser.value != null) {
         // TODO include remote host ID in desktop notifications?
-        chatModel.controller.changeActiveUser(null, userId, null)
+        chatModel.controller.showProgressIfNeeded {
+          chatModel.controller.changeActiveUser(null, userId, null)
+        }
       }
       chatModel.chatId.value = null
       chatModel.clearOverlays.value = true

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/WelcomeView.kt

@@ -21,8 +21,8 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.*
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import chat.simplex.common.model.ChatModel
-import chat.simplex.common.model.Profile
+import chat.simplex.common.model.*
+import chat.simplex.common.model.ChatModel.controller
 import chat.simplex.common.platform.*
 import chat.simplex.common.ui.theme.*
 import chat.simplex.common.views.helpers.*
@@ -76,7 +76,13 @@ fun CreateProfile(chatModel: ChatModel, close: () -> Unit) {
           disabled = !canCreateProfile(displayName.value),
           textColor = MaterialTheme.colors.primary,
           iconColor = MaterialTheme.colors.primary,
-          click = { createProfileInProfiles(chatModel, displayName.value, close) },
+          click = {
+            if (chatModel.localUserCreated.value == true) {
+              createProfileInProfiles(chatModel, displayName.value, close)
+            } else {
+              createProfileInNoProfileSetup(displayName.value, close)
+            }
+          },
         )
         SectionTextFooter(generalGetString(MR.strings.your_profile_is_stored_on_your_device))
         SectionTextFooter(generalGetString(MR.strings.profile_is_only_shared_with_your_contacts))
@@ -168,6 +174,17 @@ fun CreateFirstProfile(chatModel: ChatModel, close: () -> Unit) {
   }
 }
 
+fun createProfileInNoProfileSetup(displayName: String, close: () -> Unit) {
+  withApi {
+    val user = controller.apiCreateActiveUser(null, Profile(displayName.trim(), "", null)) ?: return@withApi
+    controller.appPrefs.onboardingStage.set(OnboardingStage.Step3_CreateSimpleXAddress)
+    chatModel.chatRunning.value = false
+    controller.startChat(user)
+    controller.switchUIRemoteHost(null)
+    close()
+  }
+}
+
 fun createProfileInProfiles(chatModel: ChatModel, displayName: String, close: () -> Unit) {
   withApi {
     val rhId = chatModel.remoteHostId()

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/call/WebRTC.kt

@@ -127,18 +127,10 @@ sealed class WCallResponse {
         "${local?.value ?: "unknown"} / ${remote?.value ?: "unknown"}"
     }
   }
-
-  val protocolText: String get() {
-    val local = localCandidate?.protocol?.uppercase(Locale.ROOT) ?: "unknown"
-    val localRelay = localCandidate?.relayProtocol?.uppercase(Locale.ROOT) ?: "unknown"
-    val remote = remoteCandidate?.protocol?.uppercase(Locale.ROOT) ?: "unknown"
-    val localText = if (localRelay == local || localCandidate?.relayProtocol == null) local else "$local ($localRelay)"
-    return if (local == remote) localText else "$localText / $remote"
-  }
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/RTCIceCandidate
-@Serializable data class RTCIceCandidate(val candidateType: RTCIceCandidateType?, val protocol: String?, val relayProtocol: String?)
+@Serializable data class RTCIceCandidate(val candidateType: RTCIceCandidateType?, val protocol: String?)
 // https://developer.mozilla.org/en-US/docs/Web/API/RTCIceServer
 @Serializable data class RTCIceServer(val urls: List<String>, val username: String? = null, val credential: String? = null)
 

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chatlist/ChatListView.kt

@@ -68,14 +68,14 @@ fun ChatListView(chatModel: ChatModel, settingsState: SettingsViewState, setPerf
   val endPadding = if (appPlatform.isDesktop) 56.dp else 0.dp
   var searchInList by rememberSaveable { mutableStateOf("") }
   val scope = rememberCoroutineScope()
-  val (userPickerState, scaffoldState, switchingUsersAndHosts ) = settingsState
+  val (userPickerState, scaffoldState ) = settingsState
   Scaffold(topBar = { Box(Modifier.padding(end = endPadding)) { ChatListToolbar(chatModel, scaffoldState.drawerState, userPickerState, stopped) { searchInList = it.trim() } } },
     scaffoldState = scaffoldState,
     drawerContent = { SettingsView(chatModel, setPerformLA, scaffoldState.drawerState) },
     drawerScrimColor = MaterialTheme.colors.onSurface.copy(alpha = if (isInDarkTheme()) 0.16f else 0.32f),
     drawerGesturesEnabled = appPlatform.isAndroid,
     floatingActionButton = {
-      if (searchInList.isEmpty()) {
+      if (searchInList.isEmpty() && !chatModel.desktopNoUserNoRemote) {
         FloatingActionButton(
           onClick = {
             if (!stopped) {
@@ -104,7 +104,7 @@ fun ChatListView(chatModel: ChatModel, settingsState: SettingsViewState, setPerf
       ) {
         if (chatModel.chats.isNotEmpty()) {
           ChatList(chatModel, search = searchInList)
-        } else if (!switchingUsersAndHosts.value) {
+        } else if (!chatModel.switchingUsersAndHosts.value && !chatModel.desktopNoUserNoRemote) {
           Box(Modifier.fillMaxSize()) {
             if (!stopped && !newChatSheetState.collectAsState().value.isVisible()) {
               OnboardingButtons(showNewChatSheet)
@@ -121,19 +121,11 @@ fun ChatListView(chatModel: ChatModel, settingsState: SettingsViewState, setPerf
     NewChatSheet(chatModel, newChatSheetState, stopped, hideNewChatSheet)
   }
   if (appPlatform.isAndroid) {
-    UserPicker(chatModel, userPickerState, switchingUsersAndHosts) {
+    UserPicker(chatModel, userPickerState) {
       scope.launch { if (scaffoldState.drawerState.isOpen) scaffoldState.drawerState.close() else scaffoldState.drawerState.open() }
       userPickerState.value = AnimatedViewState.GONE
     }
   }
-  if (switchingUsersAndHosts.value) {
-    Box(
-      Modifier.fillMaxSize().clickable(enabled = false, onClick = {}),
-      contentAlignment = Alignment.Center
-    ) {
-      ProgressIndicator()
-    }
-  }
 }
 
 @Composable
@@ -209,7 +201,7 @@ private fun ChatListToolbar(chatModel: ChatModel, drawerState: DrawerState, user
     navigationButton = {
       if (showSearch) {
         NavigationButtonBack(hideSearchOnBack)
-      } else if (chatModel.users.isEmpty()) {
+      } else if (chatModel.users.isEmpty() && !chatModel.desktopNoUserNoRemote) {
         NavigationButtonMenu { scope.launch { if (drawerState.isOpen) drawerState.close() else drawerState.open() } }
       } else {
         val users by remember { derivedStateOf { chatModel.users.filter { u -> u.user.activeUser || !u.user.hidden } } }
@@ -304,17 +296,6 @@ private fun ToggleFilterButton() {
   }
 }
 
-@Composable
-private fun ProgressIndicator() {
-  CircularProgressIndicator(
-    Modifier
-      .padding(horizontal = 2.dp)
-      .size(30.dp),
-    color = MaterialTheme.colors.secondary,
-    strokeWidth = 2.5.dp
-  )
-}
-
 @Composable
 expect fun DesktopActiveCallOverlayLayout(newChatSheetState: MutableStateFlow<AnimatedViewState>)
 

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chatlist/ShareListView.kt

@@ -26,7 +26,7 @@ import kotlinx.coroutines.flow.MutableStateFlow
 @Composable
 fun ShareListView(chatModel: ChatModel, settingsState: SettingsViewState, stopped: Boolean) {
   var searchInList by rememberSaveable { mutableStateOf("") }
-  val (userPickerState, scaffoldState, switchingUsersAndHosts) = settingsState
+  val (userPickerState, scaffoldState) = settingsState
   val endPadding = if (appPlatform.isDesktop) 56.dp else 0.dp
   Scaffold(
     Modifier.padding(end = endPadding),
@@ -47,7 +47,7 @@ fun ShareListView(chatModel: ChatModel, settingsState: SettingsViewState, stoppe
     }
   }
   if (appPlatform.isAndroid) {
-    UserPicker(chatModel, userPickerState, switchingUsersAndHosts, showSettings = false, showCancel = true, cancelClicked = {
+    UserPicker(chatModel, userPickerState, showSettings = false, showCancel = true, cancelClicked = {
       chatModel.sharedContent.value = null
       userPickerState.value = AnimatedViewState.GONE
     })

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chatlist/UserPicker.kt

@@ -26,7 +26,9 @@ import chat.simplex.common.model.ChatModel.controller
 import chat.simplex.common.ui.theme.*
 import chat.simplex.common.views.helpers.*
 import chat.simplex.common.platform.*
+import chat.simplex.common.views.CreateProfile
 import chat.simplex.common.views.remote.*
+import chat.simplex.common.views.usersettings.doWithAuth
 import chat.simplex.res.MR
 import dev.icerock.moko.resources.compose.stringResource
 import kotlinx.coroutines.delay
@@ -38,7 +40,6 @@ import kotlin.math.roundToInt
 fun UserPicker(
   chatModel: ChatModel,
   userPickerState: MutableStateFlow<AnimatedViewState>,
-  switchingUsersAndHosts: MutableState<Boolean>,
   showSettings: Boolean = true,
   showCancel: Boolean = false,
   cancelClicked: () -> Unit = {},
@@ -123,14 +124,10 @@ fun UserPicker(
         userPickerState.value = AnimatedViewState.HIDING
         if (!u.user.activeUser) {
           scope.launch {
-            val job = launch {
-              delay(500)
-              switchingUsersAndHosts.value = true
+            controller.showProgressIfNeeded {
+              ModalManager.closeAllModalsEverywhere()
+              chatModel.controller.changeActiveUser(u.user.remoteHostId, u.user.userId, null)
             }
-            ModalManager.closeAllModalsEverywhere()
-            chatModel.controller.changeActiveUser(u.user.remoteHostId, u.user.userId, null)
-            job.cancel()
-            switchingUsersAndHosts.value = false
           }
         }
       }
@@ -162,13 +159,13 @@ fun UserPicker(
       val currentRemoteHost = remember { chatModel.currentRemoteHost }.value
       Column(Modifier.weight(1f).verticalScroll(rememberScrollState())) {
         if (remoteHosts.isNotEmpty()) {
-          if (currentRemoteHost == null) {
+          if (currentRemoteHost == null && chatModel.localUserCreated.value == true) {
             LocalDevicePickerItem(true) {
               userPickerState.value = AnimatedViewState.HIDING
               switchToLocalDevice()
             }
             Divider(Modifier.requiredHeight(1.dp))
-          } else {
+          } else if (currentRemoteHost != null) {
             val connecting = rememberSaveable { mutableStateOf(false) }
             RemoteHostPickerItem(currentRemoteHost,
               actionButtonClick = {
@@ -176,7 +173,7 @@ fun UserPicker(
                 stopRemoteHostAndReloadHosts(currentRemoteHost, true)
               }) {
                 userPickerState.value = AnimatedViewState.HIDING
-                switchToRemoteHost(currentRemoteHost, switchingUsersAndHosts, connecting)
+                switchToRemoteHost(currentRemoteHost, connecting)
               }
             Divider(Modifier.requiredHeight(1.dp))
           }
@@ -184,7 +181,7 @@ fun UserPicker(
 
         UsersView()
 
-        if (remoteHosts.isNotEmpty() && currentRemoteHost != null) {
+        if (remoteHosts.isNotEmpty() && currentRemoteHost != null && chatModel.localUserCreated.value == true) {
           LocalDevicePickerItem(false) {
             userPickerState.value = AnimatedViewState.HIDING
             switchToLocalDevice()
@@ -199,7 +196,7 @@ fun UserPicker(
               stopRemoteHostAndReloadHosts(h, false)
             }) {
               userPickerState.value = AnimatedViewState.HIDING
-              switchToRemoteHost(h, switchingUsersAndHosts, connecting)
+              switchToRemoteHost(h, connecting)
           }
           Divider(Modifier.requiredHeight(1.dp))
         }
@@ -220,6 +217,18 @@ fun UserPicker(
           userPickerState.value = AnimatedViewState.GONE
         }
         Divider(Modifier.requiredHeight(1.dp))
+      } else if (chatModel.desktopNoUserNoRemote) {
+        CreateInitialProfile {
+          doWithAuth(generalGetString(MR.strings.auth_open_chat_profiles), generalGetString(MR.strings.auth_log_in_using_credential)) {
+            ModalManager.center.showModalCloseable { close ->
+              LaunchedEffect(Unit) {
+                userPickerState.value = AnimatedViewState.HIDING
+              }
+              CreateProfile(chat.simplex.common.platform.chatModel, close)
+            }
+          }
+        }
+        Divider(Modifier.requiredHeight(1.dp))
       }
       if (showSettings) {
         SettingsPickerItem(settingsClicked)
@@ -401,6 +410,16 @@ private fun LinkAMobilePickerItem(onClick: () -> Unit) {
   }
 }
 
+@Composable
+private fun CreateInitialProfile(onClick: () -> Unit) {
+  SectionItemView(onClick, padding = PaddingValues(start = DEFAULT_PADDING + 7.dp, end = DEFAULT_PADDING), minHeight = 68.dp) {
+    val text = generalGetString(MR.strings.create_chat_profile)
+    Icon(painterResource(MR.images.ic_manage_accounts), text, Modifier.size(20.dp), tint = MaterialTheme.colors.onBackground)
+    Spacer(Modifier.width(DEFAULT_PADDING + 6.dp))
+    Text(text, color = if (isInDarkTheme()) MenuTextColorDark else Color.Black)
+  }
+}
+
 @Composable
 private fun SettingsPickerItem(onClick: () -> Unit) {
   SectionItemView(onClick, padding = PaddingValues(start = DEFAULT_PADDING + 7.dp, end = DEFAULT_PADDING), minHeight = 68.dp) {
@@ -441,21 +460,15 @@ private fun switchToLocalDevice() {
   }
 }
 
-private fun switchToRemoteHost(h: RemoteHostInfo, switchingUsersAndHosts: MutableState<Boolean>, connecting: MutableState<Boolean>) {
+private fun switchToRemoteHost(h: RemoteHostInfo, connecting: MutableState<Boolean>) {
   if (!h.activeHost()) {
     withBGApi {
-      val job = launch {
-        delay(500)
-        switchingUsersAndHosts.value = true
-      }
       ModalManager.closeAllModalsEverywhere()
       if (h.sessionState != null) {
         chatModel.controller.switchUIRemoteHost(h.remoteHostId)
       } else {
         connectMobileDevice(h, connecting)
       }
-      job.cancel()
-      switchingUsersAndHosts.value = false
     }
   } else {
     connectMobileDevice(h, connecting)

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/database/DatabaseErrorView.kt

@@ -264,7 +264,8 @@ private fun DatabaseKeyField(text: MutableState<String>, enabled: Boolean, onCli
     text,
     generalGetString(MR.strings.enter_passphrase),
     isValid = ::validKey,
-    keyboardActions = KeyboardActions(onDone = if (enabled) {
+    // Don't enable this on desktop since it interfere with key event listener
+    keyboardActions = KeyboardActions(onDone = if (enabled && appPlatform.isAndroid) {
       { onClick?.invoke() }
     } else null
     ),

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/database/DatabaseView.kt

@@ -4,6 +4,7 @@ import SectionBottomSpacer
 import SectionDividerSpaced
 import SectionTextFooter
 import SectionItemView
+import SectionSpacer
 import SectionView
 import androidx.compose.desktop.ui.tooling.preview.Preview
 import androidx.compose.foundation.layout.*
@@ -20,6 +21,7 @@ import androidx.compose.ui.text.*
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import chat.simplex.common.model.*
+import chat.simplex.common.model.ChatModel.controller
 import chat.simplex.common.model.ChatModel.updatingChatsMutex
 import chat.simplex.common.ui.theme.*
 import chat.simplex.common.views.helpers.*
@@ -59,7 +61,9 @@ fun DatabaseView(
   val appFilesCountAndSize = remember { mutableStateOf(directoryFileCountAndSize(appFilesDir.absolutePath)) }
   val importArchiveLauncher = rememberFileChooserLauncher(true) { to: URI? ->
     if (to != null) {
-      importArchiveAlert(m, to, appFilesCountAndSize, progressIndicator)
+      importArchiveAlert(m, to, appFilesCountAndSize, progressIndicator) {
+        startChat(m, chatLastStart, m.chatDbChanged)
+      }
     }
   }
   val chatItemTTL = remember { mutableStateOf(m.chatItemTTL.value) }
@@ -77,7 +81,6 @@ fun DatabaseView(
       m.chatDbEncrypted.value,
       m.controller.appPrefs.storeDBPassphrase.state.value,
       m.controller.appPrefs.initialRandomDBPassphrase,
-      m.controller.appPrefs.developerTools.state.value,
       importArchiveLauncher,
       chatArchiveName,
       chatArchiveTime,
@@ -100,7 +103,13 @@ fun DatabaseView(
           setCiTTL(m, rhId, chatItemTTL, progressIndicator, appFilesCountAndSize)
         }
       },
-      showSettingsModal
+      showSettingsModal,
+      disconnectAllHosts = {
+        val connected = chatModel.remoteHosts.filter { it.sessionState is RemoteHostSessionState.Connected }
+        connected.forEachIndexed { index, h ->
+          controller.stopRemoteHostAndReloadHosts(h, index == connected.lastIndex && chatModel.connectedToRemote())
+        }
+      }
     )
     if (progressIndicator.value) {
       Box(
@@ -129,7 +138,6 @@ fun DatabaseLayout(
   chatDbEncrypted: Boolean?,
   passphraseSaved: Boolean,
   initialRandomDBPassphrase: SharedPreference<Boolean>,
-  developerTools: Boolean,
   importArchiveLauncher: FileChooserLauncher,
   chatArchiveName: MutableState<String?>,
   chatArchiveTime: MutableState<Instant?>,
@@ -144,36 +152,43 @@ fun DatabaseLayout(
   deleteChatAlert: () -> Unit,
   deleteAppFilesAndMedia: () -> Unit,
   onChatItemTTLSelected: (ChatItemTTL) -> Unit,
-  showSettingsModal: (@Composable (ChatModel) -> Unit) -> (() -> Unit)
+  showSettingsModal: (@Composable (ChatModel) -> Unit) -> (() -> Unit),
+  disconnectAllHosts: () -> Unit,
 ) {
   val stopped = !runChat
-  val operationsDisabled = !stopped || progressIndicator
+  val operationsDisabled = (!stopped || progressIndicator) && !chatModel.desktopNoUserNoRemote
 
   Column(
     Modifier.fillMaxWidth().verticalScroll(rememberScrollState()),
   ) {
     AppBarTitle(stringResource(MR.strings.your_chat_database))
 
-    SectionView(stringResource(MR.strings.messages_section_title).uppercase()) {
-      TtlOptions(chatItemTTL, enabled = rememberUpdatedState(!stopped && !progressIndicator), onChatItemTTLSelected)
-    }
-    SectionTextFooter(
-      remember(currentUser?.displayName) {
-        buildAnnotatedString {
-          append(generalGetString(MR.strings.messages_section_description) + " ")
-          withStyle(SpanStyle(fontWeight = FontWeight.Bold)) {
-            append(currentUser?.displayName ?: "")
-          }
-          append(".")
-        }
+    if (!chatModel.desktopNoUserNoRemote) {
+      SectionView(stringResource(MR.strings.messages_section_title).uppercase()) {
+        TtlOptions(chatItemTTL, enabled = rememberUpdatedState(!stopped && !progressIndicator), onChatItemTTLSelected)
       }
-    )
-
-    if (currentRemoteHost == null) {
+      SectionTextFooter(
+        remember(currentUser?.displayName) {
+          buildAnnotatedString {
+            append(generalGetString(MR.strings.messages_section_description) + " ")
+            withStyle(SpanStyle(fontWeight = FontWeight.Bold)) {
+              append(currentUser?.displayName ?: "")
+            }
+            append(".")
+          }
+        }
+      )
       SectionDividerSpaced(maxTopPadding = true)
-
+    }
+    val toggleEnabled = remember { chatModel.remoteHosts }.none { it.sessionState is RemoteHostSessionState.Connected }
+    if (chatModel.localUserCreated.value == true) {
       SectionView(stringResource(MR.strings.run_chat_section)) {
-        RunChatSetting(runChat, stopped, startChat, stopChatAlert)
+        if (!toggleEnabled) {
+          SectionItemView(disconnectAllHosts) {
+            Text(generalGetString(MR.strings.disconnect_remote_hosts), Modifier.fillMaxWidth(), color = WarningOrange)
+          }
+        }
+        RunChatSetting(runChat, stopped, toggleEnabled, startChat, stopChatAlert)
       }
       SectionTextFooter(
         if (stopped) {
@@ -183,92 +198,96 @@ fun DatabaseLayout(
         }
       )
       SectionDividerSpaced()
-
-      SectionView(stringResource(MR.strings.chat_database_section)) {
-        val unencrypted = chatDbEncrypted == false
-        SettingsActionItem(
-          if (unencrypted) painterResource(MR.images.ic_lock_open_right) else if (useKeyChain) painterResource(MR.images.ic_vpn_key_filled)
-          else painterResource(MR.images.ic_lock),
-          stringResource(MR.strings.database_passphrase),
-          click = showSettingsModal() { DatabaseEncryptionView(it) },
-          iconColor = if (unencrypted || (appPlatform.isDesktop && passphraseSaved)) WarningOrange else MaterialTheme.colors.secondary,
-          disabled = operationsDisabled
-        )
-        if (appPlatform.isDesktop && developerTools) {
-          SettingsActionItem(
-            painterResource(MR.images.ic_folder_open),
-            stringResource(MR.strings.open_database_folder),
-            ::desktopOpenDatabaseDir,
-            disabled = operationsDisabled
-          )
-        }
-        SettingsActionItem(
-          painterResource(MR.images.ic_ios_share),
-          stringResource(MR.strings.export_database),
-          click = {
-            if (initialRandomDBPassphrase.get()) {
-              exportProhibitedAlert()
-            } else {
-              exportArchive()
-            }
-          },
-          textColor = MaterialTheme.colors.primary,
-          iconColor = MaterialTheme.colors.primary,
-          disabled = operationsDisabled
-        )
-        SettingsActionItem(
-          painterResource(MR.images.ic_download),
-          stringResource(MR.strings.import_database),
-          { withApi { importArchiveLauncher.launch("application/zip") } },
-          textColor = Color.Red,
-          iconColor = Color.Red,
-          disabled = operationsDisabled
-        )
-        val chatArchiveNameVal = chatArchiveName.value
-        val chatArchiveTimeVal = chatArchiveTime.value
-        val chatLastStartVal = chatLastStart.value
-        if (chatArchiveNameVal != null && chatArchiveTimeVal != null && chatLastStartVal != null) {
-          val title = chatArchiveTitle(chatArchiveTimeVal, chatLastStartVal)
-          SettingsActionItem(
-            painterResource(MR.images.ic_inventory_2),
-            title,
-            click = showSettingsModal { ChatArchiveView(it, title, chatArchiveNameVal, chatArchiveTimeVal) },
-            disabled = operationsDisabled
-          )
-        }
-        SettingsActionItem(
-          painterResource(MR.images.ic_delete_forever),
-          stringResource(MR.strings.delete_database),
-          deleteChatAlert,
-          textColor = Color.Red,
-          iconColor = Color.Red,
-          disabled = operationsDisabled
-        )
-      }
-      SectionDividerSpaced(maxTopPadding = true)
-
-      SectionView(stringResource(MR.strings.files_and_media_section).uppercase()) {
-        val deleteFilesDisabled = operationsDisabled || appFilesCountAndSize.value.first == 0
-        SectionItemView(
-          deleteAppFilesAndMedia,
-          disabled = deleteFilesDisabled
-        ) {
-          Text(
-            stringResource(if (users.size > 1) MR.strings.delete_files_and_media_for_all_users else MR.strings.delete_files_and_media_all),
-            color = if (deleteFilesDisabled) MaterialTheme.colors.secondary else Color.Red
-          )
-        }
-      }
-      val (count, size) = appFilesCountAndSize.value
-      SectionTextFooter(
-        if (count == 0) {
-          stringResource(MR.strings.no_received_app_files)
-        } else {
-          String.format(stringResource(MR.strings.total_files_count_and_size), count, formatBytes(size))
-        }
-      )
     }
 
+    SectionView(stringResource(MR.strings.chat_database_section)) {
+      if (chatModel.localUserCreated.value != true && !toggleEnabled) {
+        SectionItemView(disconnectAllHosts) {
+          Text(generalGetString(MR.strings.disconnect_remote_hosts), Modifier.fillMaxWidth(), color = WarningOrange)
+        }
+      }
+      val unencrypted = chatDbEncrypted == false
+      SettingsActionItem(
+        if (unencrypted) painterResource(MR.images.ic_lock_open_right) else if (useKeyChain) painterResource(MR.images.ic_vpn_key_filled)
+        else painterResource(MR.images.ic_lock),
+        stringResource(MR.strings.database_passphrase),
+        click = showSettingsModal() { DatabaseEncryptionView(it) },
+        iconColor = if (unencrypted || (appPlatform.isDesktop && passphraseSaved)) WarningOrange else MaterialTheme.colors.secondary,
+        disabled = operationsDisabled
+      )
+      if (appPlatform.isDesktop) {
+        SettingsActionItem(
+          painterResource(MR.images.ic_folder_open),
+          stringResource(MR.strings.open_database_folder),
+          ::desktopOpenDatabaseDir,
+          disabled = operationsDisabled
+        )
+      }
+      SettingsActionItem(
+        painterResource(MR.images.ic_ios_share),
+        stringResource(MR.strings.export_database),
+        click = {
+          if (initialRandomDBPassphrase.get()) {
+            exportProhibitedAlert()
+          } else {
+            exportArchive()
+          }
+        },
+        textColor = MaterialTheme.colors.primary,
+        iconColor = MaterialTheme.colors.primary,
+        disabled = operationsDisabled
+      )
+      SettingsActionItem(
+        painterResource(MR.images.ic_download),
+        stringResource(MR.strings.import_database),
+        { withApi { importArchiveLauncher.launch("application/zip") } },
+        textColor = Color.Red,
+        iconColor = Color.Red,
+        disabled = operationsDisabled
+      )
+      val chatArchiveNameVal = chatArchiveName.value
+      val chatArchiveTimeVal = chatArchiveTime.value
+      val chatLastStartVal = chatLastStart.value
+      if (chatArchiveNameVal != null && chatArchiveTimeVal != null && chatLastStartVal != null) {
+        val title = chatArchiveTitle(chatArchiveTimeVal, chatLastStartVal)
+        SettingsActionItem(
+          painterResource(MR.images.ic_inventory_2),
+          title,
+          click = showSettingsModal { ChatArchiveView(it, title, chatArchiveNameVal, chatArchiveTimeVal) },
+          disabled = operationsDisabled
+        )
+      }
+      SettingsActionItem(
+        painterResource(MR.images.ic_delete_forever),
+        stringResource(MR.strings.delete_database),
+        deleteChatAlert,
+        textColor = Color.Red,
+        iconColor = Color.Red,
+        disabled = operationsDisabled
+      )
+    }
+    SectionDividerSpaced(maxTopPadding = true)
+
+    SectionView(stringResource(MR.strings.files_and_media_section).uppercase()) {
+      val deleteFilesDisabled = operationsDisabled || appFilesCountAndSize.value.first == 0
+      SectionItemView(
+        deleteAppFilesAndMedia,
+        disabled = deleteFilesDisabled
+      ) {
+        Text(
+          stringResource(if (users.size > 1) MR.strings.delete_files_and_media_for_all_users else MR.strings.delete_files_and_media_all),
+          color = if (deleteFilesDisabled) MaterialTheme.colors.secondary else Color.Red
+        )
+      }
+    }
+    val (count, size) = appFilesCountAndSize.value
+    SectionTextFooter(
+      if (count == 0) {
+        stringResource(MR.strings.no_received_app_files)
+      } else {
+        String.format(stringResource(MR.strings.total_files_count_and_size), count, formatBytes(size))
+      }
+    )
     SectionBottomSpacer()
   }
 }
@@ -319,6 +338,7 @@ private fun TtlOptions(current: State<ChatItemTTL>, enabled: State<Boolean>, onS
 fun RunChatSetting(
   runChat: Boolean,
   stopped: Boolean,
+  enabled: Boolean,
   startChat: () -> Unit,
   stopChatAlert: () -> Unit
 ) {
@@ -337,6 +357,7 @@ fun RunChatSetting(
           stopChatAlert()
         }
       },
+      enabled = enabled,
     )
   }
 }
@@ -501,13 +522,14 @@ private fun importArchiveAlert(
   m: ChatModel,
   importedArchiveURI: URI,
   appFilesCountAndSize: MutableState<Pair<Int, Long>>,
-  progressIndicator: MutableState<Boolean>
+  progressIndicator: MutableState<Boolean>,
+  startChat: () -> Unit,
 ) {
   AlertManager.shared.showAlertDialog(
     title = generalGetString(MR.strings.import_database_question),
     text = generalGetString(MR.strings.your_current_chat_database_will_be_deleted_and_replaced_with_the_imported_one),
     confirmText = generalGetString(MR.strings.import_database_confirmation),
-    onConfirm = { importArchive(m, importedArchiveURI, appFilesCountAndSize, progressIndicator) },
+    onConfirm = { importArchive(m, importedArchiveURI, appFilesCountAndSize, progressIndicator, startChat) },
     destructive = true,
   )
 }
@@ -516,7 +538,8 @@ private fun importArchive(
   m: ChatModel,
   importedArchiveURI: URI,
   appFilesCountAndSize: MutableState<Pair<Int, Long>>,
-  progressIndicator: MutableState<Boolean>
+  progressIndicator: MutableState<Boolean>,
+  startChat: () -> Unit,
 ) {
   progressIndicator.value = true
   val archivePath = saveArchiveFromURI(importedArchiveURI)
@@ -533,6 +556,10 @@ private fun importArchive(
             operationEnded(m, progressIndicator) {
               AlertManager.shared.showAlertMsg(generalGetString(MR.strings.chat_database_imported), text = generalGetString(MR.strings.restart_the_app_to_use_imported_chat_database))
             }
+            if (chatModel.localUserCreated.value == false) {
+              chatModel.chatRunning.value = false
+              startChat()
+            }
           } else {
             operationEnded(m, progressIndicator) {
               AlertManager.shared.showAlertMsg(generalGetString(MR.strings.chat_database_imported), text = generalGetString(MR.strings.restart_the_app_to_use_imported_chat_database) + "\n" + generalGetString(MR.strings.non_fatal_errors_occured_during_import))
@@ -681,7 +708,6 @@ fun PreviewDatabaseLayout() {
       chatDbEncrypted = false,
       passphraseSaved = false,
       initialRandomDBPassphrase = SharedPreference({ true }, {}),
-      developerTools = true,
       importArchiveLauncher = rememberFileChooserLauncher(true) {},
       chatArchiveName = remember { mutableStateOf("dummy_archive") },
       chatArchiveTime = remember { mutableStateOf(Clock.System.now()) },
@@ -697,6 +723,7 @@ fun PreviewDatabaseLayout() {
       deleteAppFilesAndMedia = {},
       showSettingsModal = { {} },
       onChatItemTTLSelected = {},
+      disconnectAllHosts = {},
     )
   }
 }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/helpers/Section.kt

@@ -10,6 +10,7 @@ import androidx.compose.ui.graphics.painter.Painter
 import androidx.compose.ui.platform.LocalDensity
 import dev.icerock.moko.resources.compose.painterResource
 import androidx.compose.ui.text.AnnotatedString
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.*
 import chat.simplex.common.platform.onRightClick
@@ -202,13 +203,14 @@ fun SectionTextFooter(text: String) {
 }
 
 @Composable
-fun SectionTextFooter(text: AnnotatedString) {
+fun SectionTextFooter(text: AnnotatedString, textAlign: TextAlign = TextAlign.Start) {
   Text(
     text,
     Modifier.padding(start = DEFAULT_PADDING, end = DEFAULT_PADDING, top = DEFAULT_PADDING_HALF).fillMaxWidth(0.9F),
     color = MaterialTheme.colors.secondary,
     lineHeight = 18.sp,
-    fontSize = 14.sp
+    fontSize = 14.sp,
+    textAlign = textAlign
   )
 }
 

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/newchat/CreateLinkView.kt

@@ -108,6 +108,7 @@ private fun createInvitation(
   withApi {
     val r = m.controller.apiAddContact(rhId, incognito = m.controller.appPrefs.incognito.get())
     if (r != null) {
+      m.updateContactConnection(rhId, r.second)
       connReqInvitation.value = r.first
       contactConnection.value = r.second
     } else {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/newchat/ScanToConnectView.kt

@@ -283,10 +283,11 @@ suspend fun connectViaUri(
   incognito: Boolean,
   connectionPlan: ConnectionPlan?,
   close: (() -> Unit)?
-): Boolean {
-  val r = chatModel.controller.apiConnect(rhId, incognito, uri.toString())
+) {
+  val pcc = chatModel.controller.apiConnect(rhId, incognito, uri.toString())
   val connLinkType = if (connectionPlan != null) planToConnectionLinkType(connectionPlan) else ConnectionLinkType.INVITATION
-  if (r) {
+  if (pcc != null) {
+    chatModel.updateContactConnection(rhId, pcc)
     close?.invoke()
     AlertManager.shared.showAlertMsg(
       title = generalGetString(MR.strings.connection_request_sent),
@@ -299,7 +300,6 @@ suspend fun connectViaUri(
       hostDevice = hostDevice(rhId),
     )
   }
-  return r
 }
 
 fun planToConnectionLinkType(connectionPlan: ConnectionPlan): ConnectionLinkType {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/onboarding/CreateSimpleXAddress.kt

@@ -182,6 +182,10 @@ private fun prepareChatBeforeAddressCreation(rhId: Long?) {
     val user = chatModel.controller.apiGetActiveUser(rhId) ?: return@withApi
     chatModel.currentUser.value = user
     if (chatModel.users.isEmpty()) {
+      if (appPlatform.isDesktop) {
+        // Make possible to use chat after going to remote device linking and returning back to local profile creation
+        chatModel.chatRunning.value = false
+      }
       chatModel.controller.startChat(user)
     } else {
       val users = chatModel.controller.listUsers(rhId)

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/onboarding/LinkAMobileView.kt

@@ -0,0 +1,91 @@
+package chat.simplex.common.views.onboarding
+
+import SectionTextFooter
+import SectionView
+import androidx.compose.foundation.layout.*
+import androidx.compose.runtime.*
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextDecoration
+import androidx.compose.ui.unit.dp
+import chat.simplex.common.model.ChatModel
+import chat.simplex.common.platform.chatModel
+import chat.simplex.common.ui.theme.DEFAULT_PADDING
+import chat.simplex.common.views.helpers.*
+import chat.simplex.common.views.remote.AddingMobileDevice
+import chat.simplex.common.views.remote.DeviceNameField
+import chat.simplex.common.views.usersettings.PreferenceToggle
+import chat.simplex.res.MR
+import dev.icerock.moko.resources.compose.painterResource
+import dev.icerock.moko.resources.compose.stringResource
+
+@Composable
+fun LinkAMobile() {
+  val connecting = rememberSaveable { mutableStateOf(false) }
+  val deviceName = chatModel.controller.appPrefs.deviceNameForRemoteAccess
+  var deviceNameInQrCode by remember { mutableStateOf(chatModel.controller.appPrefs.deviceNameForRemoteAccess.get()) }
+  val staleQrCode = remember { mutableStateOf(false) }
+
+  LinkAMobileLayout(
+    deviceName = remember { deviceName.state },
+    connecting,
+    staleQrCode,
+    updateDeviceName = {
+      withBGApi {
+        if (it != "" && it != deviceName.get()) {
+          chatModel.controller.setLocalDeviceName(it)
+          deviceName.set(it)
+          staleQrCode.value = deviceName.get() != deviceNameInQrCode
+        }
+      }
+    }
+  )
+  KeyChangeEffect(staleQrCode.value) {
+    if (!staleQrCode.value) {
+      deviceNameInQrCode = deviceName.get()
+    }
+  }
+}
+
+@Composable
+private fun LinkAMobileLayout(
+  deviceName: State<String?>,
+  connecting: MutableState<Boolean>,
+  staleQrCode: MutableState<Boolean>,
+  updateDeviceName: (String) -> Unit,
+) {
+  Column(Modifier.padding(top = 20.dp)) {
+    AppBarTitle(stringResource(if (remember { chatModel.remoteHosts }.isEmpty()) MR.strings.link_a_mobile else MR.strings.linked_mobiles))
+    Row(Modifier.weight(1f).padding(horizontal = DEFAULT_PADDING * 2), verticalAlignment = Alignment.CenterVertically) {
+      Column(
+        Modifier.weight(0.3f),
+        verticalArrangement = Arrangement.spacedBy(8.dp)
+      ) {
+        SectionView(generalGetString(MR.strings.this_device_name).uppercase()) {
+          DeviceNameField(deviceName.value ?: "") { updateDeviceName(it) }
+          SectionTextFooter(generalGetString(MR.strings.this_device_name_shared_with_mobile))
+          PreferenceToggle(stringResource(MR.strings.multicast_discoverable_via_local_network), remember { ChatModel.controller.appPrefs.offerRemoteMulticast.state }.value) {
+            ChatModel.controller.appPrefs.offerRemoteMulticast.set(it)
+          }
+        }
+      }
+      Box(Modifier.weight(0.7f)) {
+        AddingMobileDevice(false, staleQrCode, connecting) {
+          if (chatModel.remoteHosts.isEmpty()) {
+            chatModel.controller.appPrefs.onboardingStage.set(OnboardingStage.Step1_SimpleXInfo)
+          } else {
+            chatModel.controller.appPrefs.onboardingStage.set(OnboardingStage.OnboardingComplete)
+          }
+        }
+      }
+    }
+    SimpleButtonDecorated(
+      text = stringResource(MR.strings.about_simplex),
+      icon = painterResource(MR.images.ic_arrow_back_ios_new),
+      textDecoration = TextDecoration.None,
+      fontWeight = FontWeight.Medium
+    ) { chatModel.controller.appPrefs.onboardingStage.set(OnboardingStage.Step1_SimpleXInfo) }
+  }
+}

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/onboarding/OnboardingView.kt

@@ -3,6 +3,7 @@ package chat.simplex.common.views.onboarding
 enum class OnboardingStage {
   Step1_SimpleXInfo,
   Step2_CreateProfile,
+  LinkAMobile,
   Step2_5_SetupDatabasePassphrase,
   Step3_CreateSimpleXAddress,
   Step4_SetNotificationsMode,

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/onboarding/SetupDatabasePassphrase.kt

@@ -43,7 +43,11 @@ fun SetupDatabasePassphrase(m: ChatModel) {
   val newKey = rememberSaveable { mutableStateOf("") }
   val confirmNewKey = rememberSaveable { mutableStateOf("") }
   fun nextStep() {
-    m.controller.appPrefs.onboardingStage.set(OnboardingStage.Step3_CreateSimpleXAddress)
+    if (appPlatform.isAndroid || chatModel.currentUser.value != null) {
+      m.controller.appPrefs.onboardingStage.set(OnboardingStage.Step3_CreateSimpleXAddress)
+    } else {
+      m.controller.appPrefs.onboardingStage.set(OnboardingStage.LinkAMobile)
+    }
   }
   SetupDatabasePassphraseLayout(
     currentKey,
@@ -159,10 +163,7 @@ private fun SetupDatabasePassphraseLayout(
             }
           },
         isValid = { confirmNewKey.value == "" || newKey.value == confirmNewKey.value },
-        keyboardActions = KeyboardActions(onDone = {
-          if (!disabled) onClickUpdate()
-          defaultKeyboardAction(ImeAction.Done)
-        }),
+        keyboardActions = KeyboardActions(onDone = { defaultKeyboardAction(ImeAction.Done) }),
       )
 
       Box(Modifier.align(Alignment.CenterHorizontally).padding(vertical = DEFAULT_PADDING)) {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/onboarding/SimpleXInfo.kt

@@ -8,6 +8,7 @@ import androidx.compose.material.*
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.painter.Painter
 import dev.icerock.moko.resources.compose.painterResource
 import dev.icerock.moko.resources.compose.stringResource
@@ -99,26 +100,22 @@ private fun InfoRow(icon: Painter, titleId: StringResource, textId: StringResour
 }
 
 @Composable
-fun OnboardingActionButton(user: User?, onboardingStage: SharedPreference<OnboardingStage>, onclick: (() -> Unit)? = null) {
-  if (user == null) {
-    OnboardingActionButton(MR.strings.create_your_profile, onboarding = OnboardingStage.Step2_CreateProfile, true, onclick)
-  } else {
-    OnboardingActionButton(MR.strings.make_private_connection, onboarding = OnboardingStage.OnboardingComplete, true, onclick)
-  }
-}
+expect fun OnboardingActionButton(user: User?, onboardingStage: SharedPreference<OnboardingStage>, onclick: (() -> Unit)? = null)
 
 @Composable
 fun OnboardingActionButton(
   labelId: StringResource,
   onboarding: OnboardingStage?,
   border: Boolean,
+  icon: Painter? = null,
+  iconColor: Color = MaterialTheme.colors.primary,
   onclick: (() -> Unit)?
 ) {
   val modifier = if (border) {
     Modifier
       .border(border = BorderStroke(1.dp, MaterialTheme.colors.primary), shape = RoundedCornerShape(50))
       .padding(
-      horizontal = DEFAULT_PADDING * 2,
+      horizontal = if (icon == null) DEFAULT_PADDING * 2 else DEFAULT_PADDING_HALF,
       vertical = 4.dp
     )
   } else {
@@ -131,6 +128,9 @@ fun OnboardingActionButton(
       ChatController.appPrefs.onboardingStage.set(onboarding)
     }
   }, modifier) {
+    if (icon != null) {
+      Icon(icon, stringResource(labelId), Modifier.padding(end = DEFAULT_PADDING_HALF), tint = iconColor)
+    }
     Text(stringResource(labelId), style = MaterialTheme.typography.h2, color = MaterialTheme.colors.primary, fontSize = 20.sp)
     Icon(
       painterResource(MR.images.ic_arrow_forward_ios), "next stage", tint = MaterialTheme.colors.primary,

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/remote/ConnectMobileView.kt

@@ -13,12 +13,14 @@ import androidx.compose.foundation.text.selection.SelectionContainer
 import androidx.compose.material.*
 import androidx.compose.runtime.*
 import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalClipboardManager
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.*
 import androidx.compose.ui.text.input.*
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import chat.simplex.common.model.*
@@ -97,9 +99,11 @@ fun ConnectMobileLayout(
       SectionDividerSpaced(maxBottomPadding = false)
     }
     SectionView(stringResource(MR.strings.devices).uppercase()) {
-      SettingsActionItemWithContent(text = stringResource(MR.strings.this_device), icon = painterResource(MR.images.ic_desktop), click = connectDesktop) {
-        if (connectedHost.value == null) {
-          Icon(painterResource(MR.images.ic_done_filled), null, Modifier.size(20.dp), tint = MaterialTheme.colors.onBackground)
+      if (chatModel.localUserCreated.value == true) {
+        SettingsActionItemWithContent(text = stringResource(MR.strings.this_device), icon = painterResource(MR.images.ic_desktop), click = connectDesktop) {
+          if (connectedHost.value == null) {
+            Icon(painterResource(MR.images.ic_done_filled), null, Modifier.size(20.dp), tint = MaterialTheme.colors.onBackground)
+          }
         }
       }
 
@@ -162,26 +166,37 @@ fun DeviceNameField(
 
 @Composable
 private fun ConnectMobileViewLayout(
-  title: String,
+  title: String?,
   invitation: String?,
   deviceName: String?,
   sessionCode: String?,
-  port: String?
+  port: String?,
+  staleQrCode: Boolean = false,
+  refreshQrCode: () -> Unit = {}
 ) {
   Column(
     Modifier.fillMaxWidth().verticalScroll(rememberScrollState()),
     verticalArrangement = Arrangement.spacedBy(8.dp)
   ) {
-    AppBarTitle(title)
+    if (title != null) {
+      AppBarTitle(title)
+    }
     SectionView {
       if (invitation != null && sessionCode == null && port != null) {
-        QRCode(
-          invitation, Modifier
-            .padding(start = DEFAULT_PADDING, top = DEFAULT_PADDING_HALF, end = DEFAULT_PADDING, bottom = DEFAULT_PADDING_HALF)
-            .aspectRatio(1f)
-        )
-        SectionTextFooter(annotatedStringResource(MR.strings.open_on_mobile_and_scan_qr_code))
-        SectionTextFooter(annotatedStringResource(MR.strings.waiting_for_mobile_to_connect_on_port, port))
+        Box {
+          QRCode(
+            invitation, Modifier
+              .padding(start = DEFAULT_PADDING, top = DEFAULT_PADDING_HALF, end = DEFAULT_PADDING, bottom = DEFAULT_PADDING_HALF)
+              .aspectRatio(1f)
+          )
+          if (staleQrCode) {
+            Box(Modifier.matchParentSize().background(MaterialTheme.colors.background.copy(alpha = 0.9f)), contentAlignment = Alignment.Center) {
+              SimpleButtonDecorated(stringResource(MR.strings.refresh_qr_code), painterResource(MR.images.ic_refresh), click = refreshQrCode)
+            }
+          }
+        }
+        SectionTextFooter(annotatedStringResource(MR.strings.open_on_mobile_and_scan_qr_code), textAlign = TextAlign.Center)
+        SectionTextFooter(annotatedStringResource(MR.strings.waiting_for_mobile_to_connect_on_port, port), textAlign = TextAlign.Center)
 
         if (remember { controller.appPrefs.developerTools.state }.value) {
           val clipboard = LocalClipboardManager.current
@@ -218,6 +233,7 @@ private fun ConnectMobileViewLayout(
         }
       }
     }
+    SectionBottomSpacer()
   }
 }
 
@@ -237,55 +253,72 @@ fun connectMobileDevice(rh: RemoteHostInfo, connecting: MutableState<Boolean>) {
 
 private fun showAddingMobileDevice(connecting: MutableState<Boolean>) {
   ModalManager.start.showModalCloseable { close ->
-    val invitation = rememberSaveable { mutableStateOf<String?>(null) }
-    val port = rememberSaveable { mutableStateOf<String?>(null) }
-    val pairing = remember { chatModel.remoteHostPairing }
-    val sessionCode = when (val state = pairing.value?.second) {
-      is RemoteHostSessionState.PendingConfirmation -> state.sessionCode
-      else -> null
+    AddingMobileDevice(true, remember { mutableStateOf(false) }, connecting, close)
+  }
+}
+
+@Composable
+fun AddingMobileDevice(showTitle: Boolean, staleQrCode: MutableState<Boolean>, connecting: MutableState<Boolean>, close: () -> Unit) {
+  val invitation = rememberSaveable { mutableStateOf<String?>(null) }
+  val port = rememberSaveable { mutableStateOf<String?>(null) }
+  val startRemoteHost = suspend {
+    val r = chatModel.controller.startRemoteHost(null, controller.appPrefs.offerRemoteMulticast.get())
+    if (r != null) {
+      connecting.value = true
+      invitation.value = r.second
+      port.value = r.third
+      chatModel.remoteHostPairing.value = null to RemoteHostSessionState.Starting
     }
-    /** It's needed to prevent screen flashes when [chatModel.newRemoteHostPairing] sets to null in background */
-    var cachedSessionCode by remember { mutableStateOf<String?>(null) }
-    if (cachedSessionCode == null && sessionCode != null) {
-      cachedSessionCode = sessionCode
-    }
-    val remoteDeviceName = pairing.value?.first?.hostDeviceName
-    ConnectMobileViewLayout(
-      title = if (cachedSessionCode == null) stringResource(MR.strings.link_a_mobile) else stringResource(MR.strings.verify_connection),
-      invitation = invitation.value,
-      deviceName = remoteDeviceName,
-      sessionCode = cachedSessionCode,
-      port = port.value
-    )
-    val oldRemoteHostId by remember { mutableStateOf(chatModel.currentRemoteHost.value?.remoteHostId) }
-    LaunchedEffect(remember { chatModel.currentRemoteHost }.value) {
-      if (chatModel.currentRemoteHost.value?.remoteHostId != null && chatModel.currentRemoteHost.value?.remoteHostId != oldRemoteHostId) {
-        close()
-      }
-    }
-    KeyChangeEffect(pairing.value) {
-      if (pairing.value == null) {
-        close()
-      }
-    }
-    DisposableEffect(Unit) {
+  }
+  val pairing = remember { chatModel.remoteHostPairing }
+  val sessionCode = when (val state = pairing.value?.second) {
+    is RemoteHostSessionState.PendingConfirmation -> state.sessionCode
+    else -> null
+  }
+  /** It's needed to prevent screen flashes when [chatModel.newRemoteHostPairing] sets to null in background */
+  var cachedSessionCode by remember { mutableStateOf<String?>(null) }
+  if (cachedSessionCode == null && sessionCode != null) {
+    cachedSessionCode = sessionCode
+  }
+  val remoteDeviceName = pairing.value?.first?.hostDeviceName
+  ConnectMobileViewLayout(
+    title = if (!showTitle) null else if (cachedSessionCode == null) stringResource(MR.strings.link_a_mobile) else stringResource(MR.strings.verify_connection),
+    invitation = invitation.value,
+    deviceName = remoteDeviceName,
+    sessionCode = cachedSessionCode,
+    port = port.value,
+    staleQrCode = staleQrCode.value,
+    refreshQrCode = {
       withBGApi {
-        val r = chatModel.controller.startRemoteHost(null, controller.appPrefs.offerRemoteMulticast.get())
-        if (r != null) {
-          connecting.value = true
-          invitation.value = r.second
-          port.value = r.third
-          chatModel.remoteHostPairing.value = null to RemoteHostSessionState.Starting
+        if (chatController.stopRemoteHost(null)) {
+          startRemoteHost()
+          staleQrCode.value = false
         }
       }
-      onDispose {
-        if (chatModel.currentRemoteHost.value?.remoteHostId == oldRemoteHostId) {
-          withBGApi {
-            chatController.stopRemoteHost(null)
-          }
+    },
+  )
+  val oldRemoteHostId by remember { mutableStateOf(chatModel.currentRemoteHost.value?.remoteHostId) }
+  LaunchedEffect(remember { chatModel.currentRemoteHost }.value) {
+    if (chatModel.currentRemoteHost.value?.remoteHostId != null && chatModel.currentRemoteHost.value?.remoteHostId != oldRemoteHostId) {
+      close()
+    }
+  }
+  KeyChangeEffect(pairing.value) {
+    if (pairing.value == null) {
+      close()
+    }
+  }
+  DisposableEffect(Unit) {
+    withBGApi {
+      startRemoteHost()
+    }
+    onDispose {
+      if (chatModel.currentRemoteHost.value?.remoteHostId == oldRemoteHostId) {
+        withBGApi {
+          chatController.stopRemoteHost(null)
         }
-        chatModel.remoteHostPairing.value = null
       }
+      chatModel.remoteHostPairing.value = null
     }
   }
 }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/usersettings/NetworkAndServers.kt

@@ -25,6 +25,7 @@ import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import chat.simplex.common.model.*
+import chat.simplex.common.platform.chatModel
 import chat.simplex.common.ui.theme.*
 import chat.simplex.common.views.chat.item.ClickableText
 import chat.simplex.common.views.helpers.*
@@ -169,18 +170,20 @@ fun NetworkAndServersView(
     verticalArrangement = Arrangement.spacedBy(8.dp)
   ) {
     AppBarTitle(stringResource(MR.strings.network_and_servers))
-    SectionView(generalGetString(MR.strings.settings_section_title_messages)) {
-      SettingsActionItem(painterResource(MR.images.ic_dns), stringResource(MR.strings.smp_servers), showCustomModal { m, close -> ProtocolServersView(m, m.remoteHostId, ServerProtocol.SMP, close) })
+    if (!chatModel.desktopNoUserNoRemote) {
+      SectionView(generalGetString(MR.strings.settings_section_title_messages)) {
+        SettingsActionItem(painterResource(MR.images.ic_dns), stringResource(MR.strings.smp_servers), showCustomModal { m, close -> ProtocolServersView(m, m.remoteHostId, ServerProtocol.SMP, close) })
 
-      SettingsActionItem(painterResource(MR.images.ic_dns), stringResource(MR.strings.xftp_servers), showCustomModal { m, close -> ProtocolServersView(m, m.remoteHostId, ServerProtocol.XFTP, close) })
+        SettingsActionItem(painterResource(MR.images.ic_dns), stringResource(MR.strings.xftp_servers), showCustomModal { m, close -> ProtocolServersView(m, m.remoteHostId, ServerProtocol.XFTP, close) })
 
-      if (currentRemoteHost == null) {
-        UseSocksProxySwitch(networkUseSocksProxy, proxyPort, toggleSocksProxy, showSettingsModal)
-        UseOnionHosts(onionHosts, networkUseSocksProxy, showSettingsModal, useOnion)
-        if (developerTools) {
-          SessionModePicker(sessionMode, showSettingsModal, updateSessionMode)
+        if (currentRemoteHost == null) {
+          UseSocksProxySwitch(networkUseSocksProxy, proxyPort, toggleSocksProxy, showSettingsModal)
+          UseOnionHosts(onionHosts, networkUseSocksProxy, showSettingsModal, useOnion)
+          if (developerTools) {
+            SessionModePicker(sessionMode, showSettingsModal, updateSessionMode)
+          }
+          SettingsActionItem(painterResource(MR.images.ic_cable), stringResource(MR.strings.network_settings), showSettingsModal { AdvancedNetworkSettingsView(it) })
         }
-        SettingsActionItem(painterResource(MR.images.ic_cable), stringResource(MR.strings.network_settings), showSettingsModal { AdvancedNetworkSettingsView(it) })
       }
     }
     if (currentRemoteHost == null && networkUseSocksProxy.value) {
@@ -192,7 +195,7 @@ fun NetworkAndServersView(
         }
       }
       Divider(Modifier.padding(start = DEFAULT_PADDING_HALF, top = 32.dp, end = DEFAULT_PADDING_HALF, bottom = 30.dp))
-    } else {
+    } else if (!chatModel.desktopNoUserNoRemote) {
       Divider(Modifier.padding(start = DEFAULT_PADDING_HALF, top = 24.dp, end = DEFAULT_PADDING_HALF, bottom = 30.dp))
     }
 

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/usersettings/PrivacySettings.kt

@@ -92,7 +92,6 @@ fun PrivacySettingsView(
         chatModel.simplexLinkMode.value = it
       })
     }
-    SectionDividerSpaced()
 
     val currentUser = chatModel.currentUser.value
     if (currentUser != null) {
@@ -142,39 +141,42 @@ fun PrivacySettingsView(
         }
       }
 
-      DeliveryReceiptsSection(
-        currentUser = currentUser,
-        setOrAskSendReceiptsContacts = { enable ->
-          val contactReceiptsOverrides = chatModel.chats.fold(0) { count, chat ->
-            if (chat.chatInfo is ChatInfo.Direct) {
-              val sendRcpts = chat.chatInfo.contact.chatSettings.sendRcpts
-              count + (if (sendRcpts == null || sendRcpts == enable) 0 else 1)
+      if (!chatModel.desktopNoUserNoRemote) {
+        SectionDividerSpaced()
+        DeliveryReceiptsSection(
+          currentUser = currentUser,
+          setOrAskSendReceiptsContacts = { enable ->
+            val contactReceiptsOverrides = chatModel.chats.fold(0) { count, chat ->
+              if (chat.chatInfo is ChatInfo.Direct) {
+                val sendRcpts = chat.chatInfo.contact.chatSettings.sendRcpts
+                count + (if (sendRcpts == null || sendRcpts == enable) 0 else 1)
+              } else {
+                count
+              }
+            }
+            if (contactReceiptsOverrides == 0) {
+              setSendReceiptsContacts(enable, clearOverrides = false)
             } else {
-              count
+              showUserContactsReceiptsAlert(enable, contactReceiptsOverrides, ::setSendReceiptsContacts)
+            }
+          },
+          setOrAskSendReceiptsGroups = { enable ->
+            val groupReceiptsOverrides = chatModel.chats.fold(0) { count, chat ->
+              if (chat.chatInfo is ChatInfo.Group) {
+                val sendRcpts = chat.chatInfo.groupInfo.chatSettings.sendRcpts
+                count + (if (sendRcpts == null || sendRcpts == enable) 0 else 1)
+              } else {
+                count
+              }
+            }
+            if (groupReceiptsOverrides == 0) {
+              setSendReceiptsGroups(enable, clearOverrides = false)
+            } else {
+              showUserGroupsReceiptsAlert(enable, groupReceiptsOverrides, ::setSendReceiptsGroups)
             }
           }
-          if (contactReceiptsOverrides == 0) {
-            setSendReceiptsContacts(enable, clearOverrides = false)
-          } else {
-            showUserContactsReceiptsAlert(enable, contactReceiptsOverrides, ::setSendReceiptsContacts)
-          }
-        },
-        setOrAskSendReceiptsGroups = { enable ->
-          val groupReceiptsOverrides = chatModel.chats.fold(0) { count, chat ->
-            if (chat.chatInfo is ChatInfo.Group) {
-              val sendRcpts = chat.chatInfo.groupInfo.chatSettings.sendRcpts
-              count + (if (sendRcpts == null || sendRcpts == enable) 0 else 1)
-            } else {
-              count
-            }
-          }
-          if (groupReceiptsOverrides == 0) {
-            setSendReceiptsGroups(enable, clearOverrides = false)
-          } else {
-            showUserGroupsReceiptsAlert(enable, groupReceiptsOverrides, ::setSendReceiptsGroups)
-          }
-        }
-      )
+        )
+      }
     }
     SectionBottomSpacer()
   }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/usersettings/SettingsView.kt

@@ -25,6 +25,7 @@ import androidx.compose.ui.unit.*
 import chat.simplex.common.model.*
 import chat.simplex.common.platform.*
 import chat.simplex.common.ui.theme.*
+import chat.simplex.common.views.CreateProfile
 import chat.simplex.common.views.database.DatabaseView
 import chat.simplex.common.views.helpers.*
 import chat.simplex.common.views.onboarding.SimpleXInfo
@@ -38,76 +39,39 @@ import kotlinx.coroutines.launch
 fun SettingsView(chatModel: ChatModel, setPerformLA: (Boolean) -> Unit, drawerState: DrawerState) {
   val user = chatModel.currentUser.value
   val stopped = chatModel.chatRunning.value == false
-
-  if (user != null) {
-    val requireAuth = remember { chatModel.controller.appPrefs.performLA.state }
-    SettingsLayout(
-      profile = user.profile,
-      stopped,
-      chatModel.chatDbEncrypted.value == true,
-      remember { chatModel.controller.appPrefs.storeDBPassphrase.state }.value,
-      remember { chatModel.controller.appPrefs.notificationsMode.state },
-      user.displayName,
-      setPerformLA = setPerformLA,
-      showModal = { modalView -> { ModalManager.start.showModal { modalView(chatModel) } } },
-      showSettingsModal = { modalView -> { ModalManager.start.showModal(true) { modalView(chatModel) } } },
-      showSettingsModalWithSearch = { modalView ->
-        ModalManager.start.showCustomModal { close ->
-          val search = rememberSaveable { mutableStateOf("") }
-          ModalView(
-            { close() },
-            endButtons = {
-              SearchTextField(Modifier.fillMaxWidth(), placeholder = stringResource(MR.strings.search_verb), alwaysVisible = true) { search.value = it }
-            },
-            content = { modalView(chatModel, search) })
+  SettingsLayout(
+    profile = user?.profile,
+    stopped,
+    chatModel.chatDbEncrypted.value == true,
+    remember { chatModel.controller.appPrefs.storeDBPassphrase.state }.value,
+    remember { chatModel.controller.appPrefs.notificationsMode.state },
+    user?.displayName,
+    setPerformLA = setPerformLA,
+    showModal = { modalView -> { ModalManager.start.showModal { modalView(chatModel) } } },
+    showSettingsModal = { modalView -> { ModalManager.start.showModal(true) { modalView(chatModel) } } },
+    showSettingsModalWithSearch = { modalView ->
+      ModalManager.start.showCustomModal { close ->
+        val search = rememberSaveable { mutableStateOf("") }
+        ModalView(
+          { close() },
+          endButtons = {
+            SearchTextField(Modifier.fillMaxWidth(), placeholder = stringResource(MR.strings.search_verb), alwaysVisible = true) { search.value = it }
+          },
+          content = { modalView(chatModel, search) })
+      }
+    },
+    showCustomModal = { modalView -> { ModalManager.start.showCustomModal { close -> modalView(chatModel, close) } } },
+    showVersion = {
+      withApi {
+        val info = chatModel.controller.apiGetVersion()
+        if (info != null) {
+          ModalManager.start.showModal { VersionInfoView(info) }
         }
-      },
-      showCustomModal = { modalView -> { ModalManager.start.showCustomModal { close -> modalView(chatModel, close) } } },
-      showVersion = {
-        withApi {
-          val info = chatModel.controller.apiGetVersion()
-          if (info != null) {
-            ModalManager.start.showModal { VersionInfoView(info) }
-          }
-        }
-      },
-      withAuth = { title, desc, block ->
-        if (!requireAuth.value) {
-          block()
-        } else {
-          var autoShow = true
-          ModalManager.fullscreen.showModalCloseable { close ->
-            val onFinishAuth = { success: Boolean ->
-              if (success) {
-                close()
-                block()
-              }
-            }
-
-            LaunchedEffect(Unit) {
-              if (autoShow) {
-                autoShow = false
-                runAuth(title, desc, onFinishAuth)
-              }
-            }
-            Box(
-              Modifier.fillMaxSize().background(MaterialTheme.colors.background),
-              contentAlignment = Alignment.Center
-            ) {
-              SimpleButton(
-                stringResource(MR.strings.auth_unlock),
-                icon = painterResource(MR.images.ic_lock),
-                click = {
-                  runAuth(title, desc, onFinishAuth)
-                }
-              )
-            }
-          }
-        }
-      },
-      drawerState = drawerState,
-    )
-  }
+      }
+    },
+    withAuth = ::doWithAuth,
+    drawerState = drawerState,
+  )
 }
 
 val simplexTeamUri =
@@ -115,12 +79,12 @@ val simplexTeamUri =
 
 @Composable
 fun SettingsLayout(
-  profile: LocalProfile,
+  profile: LocalProfile?,
   stopped: Boolean,
   encrypted: Boolean,
   passphraseSaved: Boolean,
   notificationsMode: State<NotificationsMode>,
-  userDisplayName: String,
+  userDisplayName: String?,
   setPerformLA: (Boolean) -> Unit,
   showModal: (@Composable (ChatModel) -> Unit) -> (() -> Unit),
   showSettingsModal: (@Composable (ChatModel) -> Unit) -> (() -> Unit),
@@ -150,13 +114,22 @@ fun SettingsLayout(
       AppBarTitle(stringResource(MR.strings.your_settings))
 
       SectionView(stringResource(MR.strings.settings_section_title_you)) {
-        SectionItemView(showCustomModal { chatModel, close -> UserProfileView(chatModel, close) }, 80.dp, padding = PaddingValues(start = 16.dp, end = DEFAULT_PADDING), disabled = stopped) {
-          ProfilePreview(profile, stopped = stopped)
-        }
         val profileHidden = rememberSaveable { mutableStateOf(false) }
-        SettingsActionItem(painterResource(MR.images.ic_manage_accounts), stringResource(MR.strings.your_chat_profiles), { withAuth(generalGetString(MR.strings.auth_open_chat_profiles), generalGetString(MR.strings.auth_log_in_using_credential)) { showSettingsModalWithSearch { it, search -> UserProfilesView(it, search, profileHidden) } } }, disabled = stopped, extraPadding = true)
-        SettingsActionItem(painterResource(MR.images.ic_qr_code), stringResource(MR.strings.your_simplex_contact_address), showCustomModal { it, close -> UserAddressView(it, shareViaProfile = it.currentUser.value!!.addressShared, close = close) }, disabled = stopped, extraPadding = true)
-        ChatPreferencesItem(showCustomModal, stopped = stopped)
+        if (profile != null) {
+          SectionItemView(showCustomModal { chatModel, close -> UserProfileView(chatModel, close) }, 80.dp, padding = PaddingValues(start = 16.dp, end = DEFAULT_PADDING), disabled = stopped) {
+            ProfilePreview(profile, stopped = stopped)
+          }
+          SettingsActionItem(painterResource(MR.images.ic_manage_accounts), stringResource(MR.strings.your_chat_profiles), { withAuth(generalGetString(MR.strings.auth_open_chat_profiles), generalGetString(MR.strings.auth_log_in_using_credential)) { showSettingsModalWithSearch { it, search -> UserProfilesView(it, search, profileHidden) } } }, disabled = stopped, extraPadding = true)
+          SettingsActionItem(painterResource(MR.images.ic_qr_code), stringResource(MR.strings.your_simplex_contact_address), showCustomModal { it, close -> UserAddressView(it, shareViaProfile = it.currentUser.value!!.addressShared, close = close) }, disabled = stopped, extraPadding = true)
+          ChatPreferencesItem(showCustomModal, stopped = stopped)
+        } else if (chatModel.localUserCreated.value == false) {
+          SettingsActionItem(painterResource(MR.images.ic_manage_accounts), stringResource(MR.strings.create_chat_profile), { withAuth(generalGetString(MR.strings.auth_open_chat_profiles), generalGetString(MR.strings.auth_log_in_using_credential)) { ModalManager.center.showModalCloseable { close ->
+            LaunchedEffect(Unit) {
+              closeSettings()
+            }
+            CreateProfile(chatModel, close)
+          } } }, disabled = stopped, extraPadding = true)
+        }
         if (appPlatform.isDesktop) {
           SettingsActionItem(painterResource(MR.images.ic_smartphone), stringResource(if (remember { chatModel.remoteHosts }.isEmpty()) MR.strings.link_a_mobile else MR.strings.linked_mobiles), showModal { ConnectMobileView() }, disabled = stopped, extraPadding = true)
         } else {
@@ -176,10 +149,12 @@ fun SettingsLayout(
       SectionDividerSpaced()
 
       SectionView(stringResource(MR.strings.settings_section_title_help)) {
-        SettingsActionItem(painterResource(MR.images.ic_help), stringResource(MR.strings.how_to_use_simplex_chat), showModal { HelpView(userDisplayName) }, disabled = stopped, extraPadding = true)
+        SettingsActionItem(painterResource(MR.images.ic_help), stringResource(MR.strings.how_to_use_simplex_chat), showModal { HelpView(userDisplayName ?: "") }, disabled = stopped, extraPadding = true)
         SettingsActionItem(painterResource(MR.images.ic_add), stringResource(MR.strings.whats_new), showCustomModal { _, close -> WhatsNewView(viaSettings = true, close) }, disabled = stopped, extraPadding = true)
         SettingsActionItem(painterResource(MR.images.ic_info), stringResource(MR.strings.about_simplex_chat), showModal { SimpleXInfo(it, onboarding = false) }, extraPadding = true)
-        SettingsActionItem(painterResource(MR.images.ic_tag), stringResource(MR.strings.chat_with_the_founder), { uriHandler.openVerifiedSimplexUri(simplexTeamUri) }, textColor = MaterialTheme.colors.primary, disabled = stopped, extraPadding = true)
+        if (!chatModel.desktopNoUserNoRemote) {
+          SettingsActionItem(painterResource(MR.images.ic_tag), stringResource(MR.strings.chat_with_the_founder), { uriHandler.openVerifiedSimplexUri(simplexTeamUri) }, textColor = MaterialTheme.colors.primary, disabled = stopped, extraPadding = true)
+        }
         SettingsActionItem(painterResource(MR.images.ic_mail), stringResource(MR.strings.send_us_an_email), { uriHandler.openUriCatching("mailto:chat@simplex.chat") }, textColor = MaterialTheme.colors.primary, extraPadding = true)
       }
       SectionDividerSpaced()
@@ -469,6 +444,42 @@ fun PreferenceToggleWithIcon(
   }
 }
 
+fun doWithAuth(title: String, desc: String, block: () -> Unit) {
+  val requireAuth = chatModel.controller.appPrefs.performLA.get()
+  if (!requireAuth) {
+    block()
+  } else {
+    var autoShow = true
+    ModalManager.fullscreen.showModalCloseable { close ->
+      val onFinishAuth = { success: Boolean ->
+        if (success) {
+          close()
+          block()
+        }
+      }
+
+      LaunchedEffect(Unit) {
+        if (autoShow) {
+          autoShow = false
+          runAuth(title, desc, onFinishAuth)
+        }
+      }
+      Box(
+        Modifier.fillMaxSize().background(MaterialTheme.colors.background),
+        contentAlignment = Alignment.Center
+      ) {
+        SimpleButton(
+          stringResource(MR.strings.auth_unlock),
+          icon = painterResource(MR.images.ic_lock),
+          click = {
+            runAuth(title, desc, onFinishAuth)
+          }
+        )
+      }
+    }
+  }
+}
+
 private fun runAuth(title: String, desc: String, onFinish: (success: Boolean) -> Unit) {
   authenticate(
     title,

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/usersettings/UserProfilesView.kt

@@ -21,6 +21,7 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import chat.simplex.common.model.*
+import chat.simplex.common.model.ChatModel.controller
 import chat.simplex.common.platform.*
 import chat.simplex.common.ui.theme.*
 import chat.simplex.common.views.chat.item.ItemAction
@@ -56,7 +57,9 @@ fun UserProfilesView(m: ChatModel, search: MutableState<String>, profileHidden:
         ModalManager.end.closeModals()
       }
       withBGApi {
-        m.controller.changeActiveUser(user.remoteHostId, user.userId, userViewPassword(user, searchTextOrPassword.value.trim()))
+        controller.showProgressIfNeeded {
+          m.controller.changeActiveUser(user.remoteHostId, user.userId, userViewPassword(user, searchTextOrPassword.value.trim()))
+        }
       }
     },
     removeUser = { user ->

apps/multiplatform/common/src/commonMain/resources/MR/base/strings.xml

@@ -565,6 +565,7 @@
   <string name="your_settings">Your settings</string>
   <string name="your_simplex_contact_address">Your SimpleX address</string>
   <string name="your_chat_profiles">Your chat profiles</string>
+  <string name="create_chat_profile">Create chat profile</string>
   <string name="database_passphrase_and_export">Database passphrase &amp; export</string>
   <string name="about_simplex_chat">About SimpleX Chat</string>
   <string name="how_to_use_simplex_chat">How to use it</string>
@@ -1659,6 +1660,7 @@
   <string name="unlink_desktop_question">Unlink desktop?</string>
   <string name="unlink_desktop">Unlink</string>
   <string name="disconnect_remote_host">Disconnect</string>
+  <string name="disconnect_remote_hosts">Disconnect mobiles</string>
   <string name="remote_host_was_disconnected_toast"><![CDATA[Mobile <b>%s</b> was disconnected]]></string>
   <string name="disconnect_desktop_question">Disconnect desktop?</string>
   <string name="only_one_device_can_work_at_the_same_time">Only one device can work at the same time</string>
@@ -1689,6 +1691,8 @@
   <string name="paste_desktop_address">Paste desktop address</string>
   <string name="desktop_device">Desktop</string>
   <string name="not_compatible">Not compatible!</string>
+  <string name="refresh_qr_code">Refresh</string>
+  <string name="no_connected_mobile">No connected mobile</string>
 
   <!-- Under development -->
   <string name="in_developing_title">Coming soon!</string>

apps/multiplatform/common/src/commonMain/resources/MR/images/ic_refresh.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 -960 960 960" width="24"><path d="M480.433-164.5q-131.583 0-223.758-92.216Q164.5-348.932 164.5-480.082q0-131.149 92.175-223.284Q348.85-795.5 480.5-795.5q84 0 147.75 34.25T738.5-666.5v-129H796V-547H547.5v-57.5H713q-38.032-60.033-96.537-96.767Q557.959-738 480.539-738 372-738 297-663.015q-75 74.986-75 183.25 0 108.265 74.875 183.015Q371.75-222 480.331-222q82.298 0 150.734-47 68.435-47 95.623-124.5H786q-28.5 103-113.49 166-84.991 63-192.077 63Z"/></svg>

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/DesktopApp.kt

@@ -15,7 +15,6 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.*
 import chat.simplex.common.model.ChatController
 import chat.simplex.common.model.ChatModel
-import chat.simplex.common.platform.desktopPlatform
 import chat.simplex.common.ui.theme.DEFAULT_START_MODAL_WIDTH
 import chat.simplex.common.ui.theme.SimpleXTheme
 import chat.simplex.common.views.TerminalView
@@ -31,10 +30,30 @@ import java.io.File
 val simplexWindowState = SimplexWindowState()
 
 fun showApp() = application {
-  // For some reason on Linux actual width will be 10.dp less after specifying it here. If we specify 1366,
-  // it will show 1356. But after that we can still update it to 1366 by changing window state. Just making it +10 now here
-  val width = if (desktopPlatform.isLinux()) 1376.dp else 1366.dp
-  val windowState = rememberWindowState(placement = WindowPlacement.Floating, width = width, height = 768.dp)
+  // Creates file if not exists; comes with proper defaults
+  val state = getStoredWindowState()
+
+  val windowState: WindowState = rememberWindowState(
+    placement = WindowPlacement.Floating,
+    width = state.width.dp,
+    height = state.height.dp,
+    position = WindowPosition(state.x.dp, state.y.dp)
+  )
+
+  LaunchedEffect(
+    windowState.position.x.value,
+    windowState.position.y.value,
+    windowState.size.width.value,
+    windowState.size.height.value
+  ) {
+    storeWindowState(WindowPositionSize(
+      x = windowState.position.x.value.toInt(),
+      y = windowState.position.y.value.toInt(),
+      width = windowState.size.width.value.toInt(),
+      height = windowState.size.height.value.toInt()
+    ))
+  }
+
   simplexWindowState.windowState = windowState
   // Reload all strings in all @Composable's after language change at runtime
   if (remember { ChatController.appPrefs.appLanguage.state }.value != "") {
@@ -124,7 +143,7 @@ fun showApp() = application {
     var hiddenUntilRestart by remember { mutableStateOf(false) }
     if (!hiddenUntilRestart) {
       val cWindowState = rememberWindowState(placement = WindowPlacement.Floating, width = DEFAULT_START_MODAL_WIDTH, height = 768.dp)
-      Window(state = cWindowState, onCloseRequest = ::exitApplication, title = stringResource(MR.strings.chat_console)) {
+      Window(state = cWindowState, onCloseRequest = { hiddenUntilRestart = true }, title = stringResource(MR.strings.chat_console)) {
         SimpleXTheme {
           TerminalView(ChatModel) { hiddenUntilRestart = true }
         }

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/StoreWindowState.kt

@@ -0,0 +1,36 @@
+package chat.simplex.common
+
+import chat.simplex.common.model.json
+import chat.simplex.common.platform.appPreferences
+import chat.simplex.common.platform.desktopPlatform
+import kotlinx.serialization.*
+
+@Serializable
+data class WindowPositionSize(
+  val width: Int = 1366,
+  val height: Int = 768,
+  val x: Int = 0,
+  val y: Int = 0,
+)
+
+fun getStoredWindowState(): WindowPositionSize =
+  try {
+    val str = appPreferences.desktopWindowState.get()
+    var state = if (str == null) {
+      WindowPositionSize()
+    } else {
+      json.decodeFromString(str)
+    }
+
+    // For some reason on Linux actual width will be 10.dp less after specifying it here. If we specify 1366,
+    // it will show 1356. But after that we can still update it to 1366 by changing window state. Just making it +10 now here
+    if (desktopPlatform.isLinux() && state.width == 1366) {
+      state = state.copy(width = 1376)
+    }
+    state
+  } catch (e: Throwable) {
+    WindowPositionSize()
+  }
+
+fun storeWindowState(state: WindowPositionSize) =
+  appPreferences.desktopWindowState.set(json.encodeToString(state))

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/views/call/CallView.desktop.kt

@@ -136,7 +136,6 @@ private fun SendStateUpdates() {
       .collect { call ->
         val state = call.callState.text
         val connInfo = call.connectionInfo
-        //    val connInfoText = if (connInfo == null) ""  else " (${connInfo.text}, ${connInfo.protocolText})"
         val connInfoText = if (connInfo == null) ""  else " (${connInfo.text})"
         val description = call.encryptionStatus + connInfoText
         chatModel.callCommand.add(WCallCommand.Description(state, description))

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/views/onboarding/SimpleXInfo.desktop.kt

@@ -0,0 +1,23 @@
+package chat.simplex.common.views.onboarding
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.runtime.Composable
+import chat.simplex.common.model.ChatModel.controller
+import chat.simplex.common.model.SharedPreference
+import chat.simplex.common.model.User
+import chat.simplex.common.ui.theme.DEFAULT_PADDING
+import chat.simplex.res.MR
+import dev.icerock.moko.resources.compose.painterResource
+
+@Composable
+actual fun OnboardingActionButton(user: User?, onboardingStage: SharedPreference<OnboardingStage>, onclick: (() -> Unit)?) {
+  if (user == null) {
+    Row(horizontalArrangement = Arrangement.spacedBy(DEFAULT_PADDING * 2.5f)) {
+      OnboardingActionButton(MR.strings.link_a_mobile, onboarding = if (controller.appPrefs.initialRandomDBPassphrase.get()) OnboardingStage.Step2_5_SetupDatabasePassphrase else OnboardingStage.LinkAMobile, true, icon = painterResource(MR.images.ic_smartphone_300), onclick = onclick)
+      OnboardingActionButton(MR.strings.create_your_profile, onboarding = OnboardingStage.Step2_CreateProfile, true, icon = painterResource(MR.images.ic_desktop), onclick = onclick)
+    }
+  } else {
+    OnboardingActionButton(MR.strings.make_private_connection, onboarding = OnboardingStage.OnboardingComplete, true, onclick = onclick)
+  }
+}

blog/20231125-simplex-chat-v5-4-link-mobile-desktop-quantum-resistant-better-groups.md

@@ -2,48 +2,128 @@
 layout: layouts/article.html
 title: "SimpleX Chat v5.4 - link mobile and desktop apps via quantum resistant protocol, and much better groups."
 date: 2023-11-25
-preview: SimpleX Chat v5.4 - link mobile and desktop apps via quantum resistant protocol, and much better groups.
-# image: images/20231125-remote-desktop.jpg
-draft: true
-imageWide: true
-permalink: "/blog/20231125-simplex-chat-v5-4-quantum-resistant-mobile-from-desktop-better-groups.html"
+previewBody: blog_previews/20231125.html
+image: images/20231125-mobile2.png
+permalink: "/blog/20231125-simplex-chat-v5-4-link-mobile-desktop-quantum-resistant-better-groups.html"
 ---
 
-TODO stub for release announcement
-
 # SimpleX Chat v5.4 - link mobile and desktop apps via quantum resistant protocol, and much better groups.
 
 **Published:** Nov 25, 2023
 
-- [Quick start: control SimpleX Chat mobile app from CLI](#⚡️-quick-start-use-profiles-in-SimpleX-Chat-mobile-from-desktop-app)
-- [What's the problem](#whats-the-problem)
-- [Why didn't we use some existing solution?](#why-didnt-we-use-some-existing-solution)
+**What's new in v5.4:**
+- [Link mobile and desktop apps via secure quantum-resistant protocol](#link-mobile-and-desktop-apps-via-secure-quantum-resistant-protocol).
+  - ⚡️ Quick start - how to use it.
+  - How does it work?
+  - 🤖 Connecting to remote CLI.
+- [Better groups](#better-groups).
+  - [Faster to join and more reliable](#faster-to-join-with-more-reliable-message-delivery).
+  - [New group features](#new-group-features):
+    - create groups with incognito profile,
+    - block group members to reduce noise,
+    - prohibit files and media in a group.
+- [Better calls](#better-calls): faster to connect, with screen sharing on desktop.
 
-## ⚡️ Quick start: use profiles in SimpleX Chat mobile from desktop app
+There are many [other improvements](#other-improvements) and fixes in this release:
+  - profile names now allow spaces.
+  - when you delete contacts, they are optionally notified.
+  - previously used and your own SimpleX links are recognized by the app.
+  - and more - see the [release notes](https://github.com/simplex-chat/simplex-chat/releases/tag/v5.4.0).
 
-## What's the problem?
+## Link mobile and desktop apps via secure quantum-resistant protocol
 
-Currently you cannot use the same SimpleX Chat profile on mobile and desktop devices. Even though you can use small groups instead of direct conversations as a workaround, it is quite inconvenient – read status and delivery receipts become much less useful.
+This release allows to use chat profiles you have in mobile app from desktop app.
 
-So, we need a way to use the same profile on desktop as we use on mobile.
+This is only possible when both devices are connected to the same local network. To send and receive messages mobile app has to be connected to the Internet.
 
-If SimpleX Chat profile was stored on the server, the problem would have been simpler - you can just connect to it from another device. But even in this case, accessing the conversation history without compromising the security of double ratchet end-to-end encryption is not really possible.
+### ⚡️ Quick start - how to use it
 
-So we decided to implement the solution that is similar to what WhatsApp and WeChat did in early days - allowing a desktop device access profile on mobile via network. Unlike these big apps, we don't use the server to connect to mobile, but instead use the connection over the local network.
+**On desktop**
 
-The downside of this approach is that mobile device has to be with you and connected to the same local network (and in case of iOS, the app has to be in the foreground as well). But the upside is that we the connection can be secure, and that you do not have to have a copy of your profiles on the desktop, which usually has lower security.
+If you don't have desktop app installed yet, [download it](https://simplex.chat/downloads/) and create any chat profile - you don't need to use it, and when you create it there are no server requests sent and no accounts are created. Think about it as about user profile on your computer.
 
-## Why didn't we use some existing solution?
+Then in desktop app settings choose *Link a mobile* - it will show a QR code.
 
-While there are several existing protocols for remote access, all of them are vulnerable to spoofing and man 
+<img src="./images/20231125-desktop1.png" width="170"> <img src="./images/arrow.png" width="24"> <img src="./images/20231125-desktop2.png" width="170"> <img src="./images/arrow.png" width="24"> <img src="./images/20231125-desktop3.png" width="170"> <img src="./images/arrow.png" width="24"> <img src="./images/20231125-desktop4.png" width="510">
 
- in many cases support of sending files and images is not very good, and sending videos and large files is simply impossible. There are currently these problems:
+**On mobile**
 
-- the sender has to be online for file transfer to complete, once it was confirmed by the recipient.
-- when the file is sent to the group, the sender will have to transfer it separately to each member, creating a lot of traffic.
-- the file transfer is slow, as it is sent in small chunks - approximately 16kb per message.
+In mobile app settings choose *Use from desktop*, scan the QR code and verify session code when it appears on both devices - it should be the same. Verifying session code confirms that the devices are connected directly via a secure encrypted connection. There is an option to verify this code on subsequent connections too, but by default it is only required once.
 
-As a result, we limited the supported size of files in the app to 8mb. Even for supported files, it is quite inefficient for sending any files to large groups.
+<img src="./images/20231125-mobile1.png" width="170"> <img src="./images/arrow.png" width="24"> <img src="./images/20231125-mobile1a.png" width="170"> <img src="./images/arrow.png" width="24"> <img src="./images/20231125-mobile2.png" width="170"> <img src="./images/arrow.png" width="24"> <img src="./images/20231125-mobile3.png" width="170"> <img src="./images/arrow.png" width="24"> <img src="./images/20231125-mobile4.png" width="170">
+
+The devices are now paired, and you can continue using all mobile profiles from desktop.
+
+If it is an Android app, you can move the app to background, but iOS app has to remain open. In both cases, while you are using mobile profiles from desktop, you won't be able to use mobile app.
+
+The subsequent connections happen much faster - by default, the desktop app broadcasts its session address to the network, in encrypted form, and mobile app connects to it once you choose *Use from desktop* in mobile app settings.
+
+### How does it work?
+
+The way we designed this solution avoided any security compromises, and the end-to-end encryption remained as secure as it was - it uses [double-ratchet algorithm](../docs/GLOSSARY.md#double-ratchet-algorithm), with [perfect forward secrecy](../docs/GLOSSARY.md#forward-secrecy), [post-compromise security](../docs/GLOSSARY.md#post-compromise-security) and deniability.
+
+This solution is similar to WhatsApp and WeChat. But unlike these apps, no server is involved in the connection between mobile and desktop. The connection itself uses a new SimpleX Remote Control Protocol (XRCP) based on secure TLS 1.3 and additional quantum-resistant encryption inside TLS. You can read XRCP protocol specification and threat model in [this document](https://github.com/simplex-chat/simplexmq/blob/master/rfcs/2023-10-25-remote-control.md). We will soon be [augmenting double ratchet](https://github.com/simplex-chat/simplex-chat/blob/master/docs/rfcs/2023-09-30-pq-double-ratchet.md) to be resistant to quantum computers as well.
+
+The downside of this approach is that mobile device has to be connected to the same local network as desktop. But the upside is that the connection is secure, and you do not need to have a copy of all your data on desktop, which usually has lower security than mobile.
+
+Please note, that the files you send, save or play from desktop app, and also images you view are automatically saved on your desktop device (encrypted by default except videos). To remove all these files you can unlink the paired mobile device from the desktop app settings – there will be an option soon allowing to remove the files without unlinking the mobile.
+
+### 🤖 Connecting to remote SimpleX CLI
+
+*Warning*: this section is for technically advanced users!
+
+If you run SimpleX CLI on a computer in another network - e.g., in the cloud VM or on a Raspberry Pi at home while you are at work, you can also use if from desktop via SSH tunnel. Below assumes that you have remote machine connected via SSH and CLI running there - you can use `tmux` for it to keep running when you are not connected via ssh.
+
+Follow these steps to use remote CLI from desktop app:
+1. On the remote machine add the IP address of your desktop to the firewall rules, so that when CLI tries to connect to this address, it connects to `localhost` instead: `iptables -t nat -A OUTPUT -p all -d 192.168.1.100 -j DNAT --to-destination 127.0.0.1` (replace `192.168.1.100` with the actual address of your desktop, and make sure it is not needed for something else on your remote machine).
+2. Also on the remote machine, run Simplex CLI with the option `--device-name 'SimpleX CLI'`, or any other name you like. You can also use the command `/set device name <name>` to set it for the CLI.
+3. Choose *Link a mobile* in desktop app settings, note the port it shows under the QR code, and click "Share link".
+4. Run ssh port forwarding on desktop computer to let your remote machine connect to desktop app: `ssh -R 12345:127.0.0.1:12345 -N user@example.com` where `12345` is the port on which desktop app is listening for the connections from step 3, `example.com` is the hostname or IP address of your remote machine, and `user` is some username on remote machine. You can run port forwarding in the background by adding `-f` option.
+5. On the remote machine, run CLI command `/connect remote ctrl <link>`, where `<link>` is the desktop session address copied in step 3. You should run this command within 1 minute from choosing *Link a mobile*.
+6. If the connection is successful, the CLI will ask you to verify the session code (you need to copy and paste the command) with the one shown in desktop app. Once you use `/verify remote ctrl <code>` command, CLI can be used from desktop app.
+7. To stop remote session use `/stop remote ctrl` command.
+
+## Better groups
+
+### Faster to join, with more reliable message delivery
+
+We improved the protocols for groups, by making joining groups much faster, and also by adding message forwarding. Previously, the problem was that until a new member connects directly with each existing group member, they did not see each other messages in the group. The problem is explained in detail in [this video](https://www.youtube.com/watch?v=7yjQFmhAftE&t=1104s) at 18:23.
+
+With v5.4, the admin who added members to the group forwards messages to and from the new members until they connect to the existing members. So you should no longer miss any messages and be surprised with replies to messages you have never seen once you and new group members upgrade.
+
+### New group features
+
+<img src="./images/20231125-group1.png" width="220" class="float-to-left"> <img src="./images/20231125-block.png" width="220" class="float-to-left">
+
+**Create groups with incognito profile**
+
+Previously, you could only create groups with your main profile. This version allows creating groups with incognito profile directly. You will not be able to add your contacts, they can only join via group link.
+
+**Block group members to reduce noise**
+
+You now can block messages from group members that send too many messages, or the messages you don't won't to see. Blocked members won't know that you blocked their messages. When they send messages they will appear in the conversation as one line, showing how many messages were blocked. You can reveal them, or delete all sequential blocked messages at once.
+
+**Prohibit files and media in a group**
+
+Group owners now have an option to prohibit sending files and media. This can be useful if you don't won't any images shared, and only want to allow text messages.
+
+## Better calls
+
+Calls in SimpleX Chat still require a lot of work to become stable, but this version improved the speed of connecting calls, and they should work for more users.
+
+We also added screen sharing in video calls to desktop app.
+
+## Other improvements
+
+This version also has many small and large improvements to make the app more usable and reliable.
+
+The new users and group profiles now allow spaces in the names, to make them more readable. To message these contacts in CLI you need to use quotes, for example, `@'John Doe' Hello!`.
+
+When you delete contacts, you can notify them - to let them know they can't message you.
+
+When you try to connect to the same contact or join the same group, or connect via your own link, the app will recognize it and warn you, or simply open the correct conversation.
+
+You can find the full list of fixed bugs and small improvements in the [release notes](https://github.com/simplex-chat/simplex-chat/releases/tag/v5.4.0).
 
 ## SimpleX platform
 

blog/README.md

@@ -1,5 +1,27 @@
 # Blog
 
+Nov 25, 2023 [SimpleX Chat v5.4 released](./20231125-simplex-chat-v5-4-link-mobile-desktop-quantum-resistant-better-groups.md)
+
+- Link mobile and desktop apps via secure quantum-resistant protocol. 🔗
+- Better groups:
+  - faster to join and more reliable.
+  - create groups with incognito profile.
+  - block group members to reduce noise.
+  - prohibit files and media in a group.
+- Better calls: faster to connect, with screen sharing on desktop.
+- Many other improvements.
+
+---
+
+Sep 25, 2023 [SimpleX Chat v5.3 released](./20230925-simplex-chat-v5-3-desktop-app-local-file-encryption-directory-service.md)
+
+- new desktop app! 💻
+- directory service and other group improvements.
+- encrypted local files and media with forward secrecy.
+- simplified incognito mode.
+
+---
+
 July 22, 2023 [SimpleX Chat v5.2 released](./20230722-simplex-chat-v5-2-message-delivery-receipts.md)
 
 **What's new in v5.2:**

cabal.project

@@ -9,7 +9,7 @@ constraints: zip +disable-bzip2 +disable-zstd
 source-repository-package
     type: git
     location: https://github.com/simplex-chat/simplexmq.git
-    tag: 757b7eec81341d8560a326deab303bb6fb6a26a3
+    tag: 90a8fc91d35c578c3b52ad296a6f1df715da2278
 
 source-repository-package
     type: git
@@ -45,8 +45,3 @@ source-repository-package
     type: git
     location: https://github.com/simplex-chat/android-support.git
     tag: 9aa09f148089d6752ce563b14c2df1895718d806
-
-source-repository-package
-    type: git
-    location: https://github.com/simplex-chat/network-transport.git
-    tag: 0013798272a683e35ca38d2fdaf480942311fba8

docs/DOWNLOADS.md

@@ -1,13 +1,13 @@
 ---
 title: Download SimpleX apps
 permalink: /downloads/index.html
-revision: 01.10.2023
+revision: 25.11.2023
 ---
 
-| Updated 01.10.2023 | Languages: EN |
+| Updated 25.11.2023 | Languages: EN |
 # Download SimpleX apps
 
-The latest stable version is v5.3.2.
+The latest stable version is v5.4.0.
 
 You can get the latest beta releases from [GitHub](https://github.com/simplex-chat/simplex-chat/releases).
 
@@ -21,24 +21,24 @@ You can get the latest beta releases from [GitHub](https://github.com/simplex-ch
 
 Using the same profile as on mobile device is not yet supported – you need to create a separate profile to use desktop apps.
 
-**Linux**: [AppImage](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.2/simplex-desktop-x86_64.AppImage) (most Linux distros), [Ubuntu 20.04](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.2/simplex-desktop-ubuntu-20_04-x86_64.deb) (and Debian-based distros), [Ubuntu 22.04](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.2/simplex-desktop-ubuntu-22_04-x86_64.deb).
+**Linux**: [AppImage](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-desktop-x86_64.AppImage) (most Linux distros), [Ubuntu 20.04](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-desktop-ubuntu-20_04-x86_64.deb) (and Debian-based distros), [Ubuntu 22.04](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-desktop-ubuntu-22_04-x86_64.deb).
 
-**Mac**: [x86_64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.2/simplex-desktop-macos-x86_64.dmg) (Intel), [aarch64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.1/simplex-desktop-macos-aarch64.dmg) (Apple Silicon).
+**Mac**: [x86_64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-desktop-macos-x86_64.dmg) (Intel), [aarch64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-desktop-macos-aarch64.dmg) (Apple Silicon).
 
-**Windows**: [x86_64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0-beta.3/simplex-desktop-windows-x86-64.msi) (BETA).
+**Windows**: [x86_64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-desktop-windows-x86_64.msi).
 
 ## Mobile apps
 
 **iOS**: [App store](https://apps.apple.com/us/app/simplex-chat/id1605771084), [TestFlight](https://testflight.apple.com/join/DWuT2LQu).
 
-**Android**: [Play store](https://play.google.com/store/apps/details?id=chat.simplex.app), [F-Droid](https://simplex.chat/fdroid/), [APK aarch64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.2/simplex.apk), [APK armv7](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.2/simplex-armv7a.apk).
+**Android**: [Play store](https://play.google.com/store/apps/details?id=chat.simplex.app), [F-Droid](https://simplex.chat/fdroid/), [APK aarch64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex.apk), [APK armv7](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-armv7a.apk).
 
 ## Terminal (console) app
 
 See [Using terminal app](/docs/CLI.md).
 
-**Linux**: [Ubuntu 20.04](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.2/simplex-chat-ubuntu-20_04-x86-64), [Ubuntu 22.04](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.2/simplex-chat-ubuntu-22_04-x86-64).
+**Linux**: [Ubuntu 20.04](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-chat-ubuntu-20_04-x86-64), [Ubuntu 22.04](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-chat-ubuntu-22_04-x86-64).
 
-**Mac** [x86_64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.2/simplex-chat-macos-x86-64), aarch64 - [compile from source](./CLI.md#).
+**Mac** [x86_64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-chat-macos-x86-64), aarch64 - [compile from source](./CLI.md#).
 
-**Windows**: [x86_64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.3.2/simplex-chat-windows-x86-64).
+**Windows**: [x86_64](https://github.com/simplex-chat/simplex-chat/releases/download/v5.4.0/simplex-chat-windows-x86-64).

docs/guide/app-settings.md

@@ -8,7 +8,7 @@ title: App settings
 To open app settings:
 
 - Open the app.
-- Tap on your user profile image in the upper right-hand of the screen.
+- Tap on your user profile image in the upper left-hand of the screen.
 - If you have more than one profile, tap the current profile again or choose Settings.
 
 ## Your profile settings

docs/rfcs/2023-09-30-pq-double-ratchet.md

@@ -0,0 +1,224 @@
+# Post-quantum resistant augmented double ratchet algorithm
+
+- [Overview](#overview)
+- [Problem](#problem)
+- [Comparison of the proposed solutions](#comparison-of-the-proposed-solutions)
+  - [PQXDH for post-quantum key agreement](#pqxdh-for-post-quantum-key-agreement) (Signal)
+  - [Hybrid Signal protocol for post-quantum encryption](#hybrid-signal-protocol-for-post-quantum-encryption) (Tutanota)
+  - [Problems with ML-KEM / Kyber](#problems-with-ml-kem--kyber)
+- [Proposed solution: augmented double ratchet algorithm](#proposed-solution-augmented-double-ratchet-algorithm)
+- [Double ratchet with encrypted headers augmented with double PQ KEM](#double-ratchet-with-encrypted-headers-augmented-with-double-pq-kem)
+  - [Initialization](#initialization)
+  - [Encrypting messages](#encrypting-messages)
+  - [Decrypting messages](#decrypting-messages)
+- [Alternative approach: CTIDH](#alternative-approach-ctidh)
+- [Implementation considerations for SimpleX Chat](#implementation-considerations-for-simplex-chat)
+- [Summary](#summary)
+- [Notes](#notes)
+
+## 1. Overview
+
+Currently SimpleX Chat uses [double-ratchet with header encryption](https://signal.org/docs/specifications/doubleratchet/#double-ratchet-with-header-encryption) to provide end-to-end encryption to messages and files. This document proposes a way to augment this algorithm with post-quantum key encapsulation mechanism (KEM) to make it resistant to quantum computers.
+
+This document is purposefully written in an informal style to make it understandable for general audience with some technical, but without mathematical background. It does not compromise on the technical accuracy though.
+
+## 2. Problem
+
+It is a reasonable assumption that "record-now-decrypt-later" attacks are ongoing, so the users want to use cryptographic schemes for end-to-end encryption that are augmented with some post-quantum algorithm that is believed to be resistant to quantum computers.
+
+Double-ratchet algorithm is a state of the art solution for end to end encryption offering a set of qualities that is unmatched by any other algorithm:
+
+- perfect forward secrecy, i.e. compromise of session or long term keys does not lead to the ability to decrypt any of the past messages.
+- deniability (also known as repudiation), i.e. the fact that the recipient of the message cannot prove to a third party that the sender actually sent this message [1].
+- break-in recovery [2] (also know as post-compromise security or future secrecy), i.e. the ability of the end-to-end encryption security to recover from the compromise of the long term keys. This is achieved by generating a new random key pair whenever a new DH key is received (DH ratchet step).
+
+It is desirable to preserve all these qualities when augmenting the algorithm with a post-quantum algorithm, and having these qualities resistant (or "believed to be" resistant [3]) to both conventional and quantum computers.
+
+## Comparison of the proposed solutions
+
+### PQXDH for post-quantum key agreement
+
+[The solution](https://signal.org/docs/specifications/pqxdh/) recently [introduced by Signal](https://signal.org/blog/pqxdh/) augments the initial key agreement ([X3DH](https://signal.org/docs/specifications/x3dh/)) that is made prior to double ratchet algorithm. This is believed to provide protection from "record-now-decrypt-later" attack, but if the attacker at any point obtains long term keys from any of the devices, the break-in recovery will not be post-quantum resistant, and the attacker would be able to decrypt all the subsequent messages.
+
+In addition to that, the authentication of parties in the proposed scheme is also not post-quantum resistant, although this is not part of double ratchet algorithm.
+
+### Hybrid Signal protocol for post-quantum encryption
+
+[The solution](https://eprint.iacr.org/2021/875.pdf) [proposed by Tutanota](https://tutanota.com/blog/posts/pqmail-update/) aims to preserve the break-in recovery property of double ratchet, but in doing so it:
+- replaces rather than augments DH key agreement with post-quantum KEM mechanism, making it potentially vulnerable to conventional computers.
+- adds signature to the DH ratchet step, to compensate for not keeping DH key agreement, but losing the deniability property for some of the messages.
+
+### Problems with ML-KEM / Kyber
+
+ML-KEM / Kyber used in both Signal and Tutanota schemes is the chosen algorithm by NIST, but its standardisation process raised some concerns amongst the experts:
+
+- hashing of random numbers that was present in the original submission was removed from the standardised version of the algorithm. See lines 304-314 in the published spec (https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.203.ipd.pdf) and also the linked discussion on the subject: https://groups.google.com/a/list.nist.gov/g/pqc-forum/c/WFRDl8DqYQ4. This decision polarised the experts, with some of them saying that it effectively created a backdoor.
+- calculation of security levels of Kyber appears to have been done incorrectly, and overall, the chosen Kyber seems worse than rejected NTRU according to [the analysis by Daniel Bernstein](https://blog.cr.yp.to/20231003-countcorrectly.html).
+
+## Proposed solution: augmented double ratchet algorithm
+
+We will augment the double ratchet algorithm with post-quantum KEM mechanism, preserving all properties of the double ratchet algorithm.
+
+It is possible, because although double ratchet uses DH (which is a non-interactive key exchange [4]), it uses it "interactively", when the new DH keys are generated by both parties in turns. Parties of double-ratchet encrypted communication can run one or two post-quantum key encapsulation mechanisms in parallel with DH key agreement on each DH ratchet step, making break-in recovery of double ratchet algorithm post-quantum resistant (unlike Signal PQXDH scheme), without losing deniability or resistance to conventional computers (unlike Tutanota scheme).
+
+Specifically, it is proposed to augment [double ratchet with encrypted headers](https://signal.org/docs/specifications/doubleratchet/#double-ratchet-with-header-encryption) with some post-quantum key encapsulation mechanism (KEM) as described below. A possible algorithm for PQ KEM is [NTRU-prime](https://ntruprime.cr.yp.to), that is currently adopted in SSH and has available implementations. It is important though that the proposed scheme can be used with any PQ KEM algorithm.
+
+The downside of the proposed scheme is its substantial size overhead, as the encapsulation key and/or encapsulated shared secret are added to the header of each message. For the scheme described below, when both the encapsulation key and encapsulated secret are added to each message header, NTRU-prime adds ~2-4kb to each message (depending on the key size and the chosen variant). See [this table](https://ntruprime.cr.yp.to/security.html) for key and ciphertext sizes and the assessment of the security level for various key sizes.
+
+## Double ratchet with encrypted headers augmented with double PQ KEM
+
+Algorithm below assumes that in addition to shared secret from the initial key agreement, there will be an encapsulation key available from the party that published its keys (Bob).
+
+### Initialization
+
+The double ratchet initialization is defined in pseudocode as follows:
+
+```
+// Alice obtained Bob's keys and initializes ratchet first
+def RatchetInitAlicePQ2HE(state, SK, bob_dh_public_key, shared_hka, shared_nhkb, bob_pq_kem_encapsulation_key):
+    state.DHRs = GENERATE_DH()
+    state.DHRr = bob_dh_public_key
+    // below added for post-quantum KEM
+    state.PQRs = GENERATE_PQKEM()
+    state.PQRr = bob_pq_kem_encapsulation_key
+    state.PQRss = random // shared secret for KEM
+    state.PQRenc_ss = PQKEM-ENC(state.PQRr.encaps, state.PQRss) // encapsulated additional shared secret
+    // above added for KEM
+    // below augments DH key agreement with PQ shared secret
+    state.RK, state.CKs, state.NHKs = KDF_RK_HE(SK, DH(state.DHRs, state.DHRr) || state.PQRss) 
+    state.CKr = None
+    state.Ns = 0
+    state.Nr = 0
+    state.PN = 0
+    state.MKSKIPPED = {}
+    state.HKs = shared_hka
+    state.HKr = None
+    state.NHKr = shared_nhkb
+
+// Bob initializes ratchet second, having received Alice's connection request
+def RatchetInitBobPQ2HE(state, SK, bob_dh_key_pair, shared_hka, shared_nhkb, bob_pq_kem_key_pair):
+    state.DHRs = bob_dh_key_pair
+    state.DHRr = None
+    // below added for KEM
+    state.PQRs = bob_pq_kem_key_pair
+    state.PQRr = None
+    state.PQRss = None
+    state.PQRenc_ss = None
+    // above added for KEM
+    state.RK = SK 
+    state.CKs = None
+    state.CKr = None
+    state.Ns = 0
+    state.Nr = 0
+    state.PN = 0
+    state.MKSKIPPED = {}
+    state.HKs = None
+    state.NHKs = shared_nhkb
+    state.HKr = None
+    state.NHKr = shared_hka
+```
+
+`GENERATE_PQKEM` generates decapsulation/encapsulation key pair.
+
+`PQKEM-ENC` is key encapsulation algorithm.
+
+Other than commented lines, the above adds parameters `bob_pq_kem_encapsulation_key` and `bob_pq_kem_key_pair` to the ratchet intialization. Otherwise it is identical to the original double ratchet initialization.
+
+### Encrypting messages
+
+```
+def RatchetEncryptPQ2HE(state, plaintext, AD):
+    state.CKs, mk = KDF_CK(state.CKs)
+    // encapsulation key from PQRs and encapsulated shared secret is added to header
+    header = HEADER_PQ2(
+      dh = state.DHRs.public,
+      pn = state.PN,
+      n = state.Ns,
+      encaps = state.PQRs.encaps, // added for KEM #1
+      enc_ss = state.PQRenc_ss // added for KEM #2
+    )
+    enc_header = HENCRYPT(state.HKs, header)
+    state.Ns += 1
+    return enc_header, ENCRYPT(mk, plaintext, CONCAT(AD, enc_header))
+```
+
+Other than adding encapsulation key and encapsulated shared secret into the header, the above is identical to the original double ratchet message encryption step.
+
+As an optimization, to save space, it might be possible to add encapsulation key and encapsulated secret only when they change. The downside of this optimization would be that it will be impossible to decrypt the message when the message that has them is skipped or lost, compromising the ability of double ratchet to manage skipped messages.
+
+### Decrypting messages
+
+```
+def RatchetDecryptPQ2HE(state, enc_header, ciphertext, AD):
+    plaintext = TrySkippedMessageKeysHE(state, enc_header, ciphertext, AD)
+    if plaintext != None:
+        return plaintext
+    header, dh_ratchet = DecryptHeader(state, enc_header) // DecryptHeader is the same as in double ratchet specification
+    if dh_ratchet:
+        SkipMessageKeysHE(state, header.pn) // SkipMessageKeysHE is the same as in double ratchet specification
+        DHRatchetPQ2HE(state, header)
+    SkipMessageKeysHE(state, header.n)
+    state.CKr, mk = KDF_CK(state.CKr)
+    state.Nr += 1
+    return DECRYPT(mk, ciphertext, CONCAT(AD, enc_header))
+
+def DHRatchetPQ2HE(state, header):
+    state.PN = state.Ns
+    state.Ns = 0
+    state.Nr = 0
+    state.HKs = state.NHKs
+    state.HKr = state.NHKr
+    state.DHRr = header.dh
+    // save new encapsulation key from header
+    state.PQRr = header.encaps
+    // decapsulate shared secret from header - KEM #2
+    ss = PQKEM-DEC(state.PQRs.decaps, header.enc_ss)
+    // use decapsulated shared secret with receiving ratchet
+    state.RK, state.CKr, state.NHKr = KDF_RK_HE(state.RK, DH(state.DHRs, state.DHRr) || ss)
+    state.DHRs = GENERATE_DH()
+    // below is added for KEM
+    state.PQRs = GENERATE_PQKEM() // generate new PQ key pair
+    state.PQRss = random // shared secret for KEM
+    state.PQRenc_ss = PQKEM-ENC(state.PQRr.encaps, state.PQRss) // encapsulated additional shared secret KEM #1
+    // above is added for KEM
+    // use new shared secret with sending ratchet
+    state.RK, state.CKs, state.NHKs = KDF_RK_HE(state.RK, DH(state.DHRs, state.DHRr) || state.PQRss)
+```
+
+`PQKEM-DEC` is key decapsulation algorithm.
+
+`DHRatchetPQ2HE` augments both DH agreements with decapsulated shared secret from the received header and with the new shared secret, respectively. The new shared secret together with the new encapsulation key are saved in the state and will be added to the header in the next sent message.
+
+Other than augmenting DH key agreements with the shared secrets from KEM, the above is identical to the original double ratchet DH ratchet step.
+
+It is worth noting that while DH agreements work as ping-pong, when the new received DH key is used for both DH agreements (and only the sent DH key is updated for the second DH key agreement), PQ KEM agreements in the proposed scheme work as a "parallel ping-pong", with two balls in play all the time (two KEM agreements run in parallel).
+
+## Alternative approach: CTIDH
+
+Instead of using KEM, we can consider using [CTIDH](https://ctidh.isogeny.org). The advantage is a smaller key size, and also as CTIDH is non-interactive [4], there is no need to run two key agreements in parallel, the PQ keys would simply augment DH keys and would be used in the same way.
+
+The main downside is the absense of performance-efficient implementation for aarch64 architecture.
+
+## Implementation considerations for SimpleX Chat
+
+As SimpleX Chat pads messages to a fixed size, using 16kb transport blocks, the size increase introduced by this scheme will not cause additional traffic in most cases. For large texts it may require additional messages to be sent. Similarly, for media previews it may require either reducing the preview size (and quality) or sending additional messages.
+
+That might be the primary reason why this scheme was not adopted by Signal, as it would have resulted in substantial traffic growth – to the best of our knowledge, Signal messages are not padded to a fixed size.
+
+Sharing the initial keys in case of SimpleX Chat it is equivalent to sharing the invitation link. As encapsulation key is large, it may be inconvenient to share it in the link in some contexts.
+
+It is possible to postpone sharing the encapsulation key until the first message from Alice (confirmation message in SMP protocol), the party sending connection request. The upside here is that the invitation link size would not increase. The downside is that the user profile shared in this confirmation will not be encrypted with PQ-resistant algorithm. To mitigate it, the hadnshake protocol can be modified to postpone sending the user profile until the second message from Alice (HELLO message in SMP protocol).
+
+## Summary
+
+If chosen PQ KEM proves secure against quantum computer attacks, then the proposed augmented double ratchet will also be secure against quantum computer attack, including break-in recovery property, while keeping deniability and forward secrecy, because the [same proof](https://eprint.iacr.org/2016/1013.pdf) as for double ratchet algorithm would hold here, provided KEM is secure.
+
+## Notes
+
+[1] This is often misunderstood to mean that the recipient cannot prove that the sender sent the message at all, which is incorrect, as the recipient has the proof that either themselves or the sender encrypted the message, and as they know that the recipient themselves did not encrypt it, therefore the sender did. So the communication is secure and authenticated for the parties, without providing a proof to a third party.
+
+[2] The term "break-in recovery" is used in this document, consistent with the terminology of the double ratchet algorithm specification, and also because it can be used to mean both the quality of being able to recover from the compromise and the actual process used to recover.
+
+[3] This is important to remember that no existing post-quantum algorithms are proven to be resistant to quantum or even conventional computers, therefore the correct approach is to augment rather than replace existing algorithms with the post-quantum ones.
+
+[4] Non-interactive key exchange is a type of key agreement that allows both parties to generate key pairs independently, without input from another parties, and then use the public keys from each other to compute the same shared secret.

docs/rfcs/2023-11-21-inactive-group-members.md

@@ -0,0 +1,110 @@
+# Inactive group members
+
+## Problem
+
+Group traffic is higher than necessary due to lack of diagnosis of inactive group members. By inactive we understand group members who went offline for indefinitely long time, uninstalled application without leaving group, failed to send x.grp.leave message before deleting connection, or in any other way failed to explicitly communicate further inactivity.
+
+Currently other group members continue to identify such members as active and to send messages to their connections until exceeding receiving SMP queues quotas, with pending messages being slowly retried even after that.
+
+## Solution
+
+Identify inactive members and don't send messages to their connections. Silent periodically online members should continue to receive messages, so decision to mark member as inactive should be made conservatively.
+
+Agent:
+- on SMP.QUOTA error notify client with ERR CONN QUOTA (new ConnectionErrorType QUOTA).
+- on receiving QCONT notify client (new event).
+
+Chat, on sending side, per member:
+- unanswered_snd_msg_count - number of messages that were sent consecutively without receiving a message from member.
+- last_rcv_ts - timestamp of last received message.
+- inactive flag.
+- set inactive if:
+  - agent reports QUOTA error.
+  - on sending message: (unanswered_snd_msg_count > K) && (last_rcv_ts earlier than Ddiff days ago), Ddiff = 1/2/3 days?
+- reset inactive:
+  - on receiving QCONT.
+  - on receiving message or receipt. Also reset unanswered_snd_msg_count, last_rcv_ts.
+- don't send to member if inactive.
+  - don't send only content messages (x.msg.new, etc.) and always send messages altering group state?
+- unanswered_snd_msg_count, last_rcv_ts to be tracked, checked, reset only for members with compatible version.
+
+Chat, on receiving side, per member:
+- unanswered_rcv_msg_count - number of messages that were received consecutively without sending a message to member.
+- send non-optional receipt / another (new) protocol message if:
+  - on receiving message: unanswered_rcv_msg_count > M, M < K.
+- on sending a message or receipt to member reset unanswered_rcv_msg_count.
+- unanswered_rcv_msg_count to be tracked, checked, reset only for members with compatible version.
+
+\***
+
+Consider above condition:
+
+> (unanswered_snd_msg_count > K) && (last_rcv_ts earlier than Ddiff days ago)
+
+It still doesn't account for following situation:
+
+1. Sending member sends a few (N1, N1 < M) messages to silent member on day D1.
+2. Sending member doesn't send messages for several days.
+3. Sending member sends more messages (N2, N1 + N2 > K) to silent member on day DI (DI - D1 > diff in days in above condition), while silent member is offline.
+  - Sending member checks above condition and evaluates it to be true, marks silent member as inactive.
+  - Simply remembering last_snd_ts on sending side and adding check for it not being from several days ago to above condition is not enough, as it will be overwritten by current day sends and will only evaluate false for the first send. What could work is remembering prev_session_last_snd_ts or prev_day_last_snd_ts, but it further complicates logic, and still probably wouldn't account for some time zone differences.
+4. Sending member sends yet more messages, which will not be queued for silent member marked inactive.
+5. Silent member comes online, sends receipt upon receiving message fulfilling above condition: `unanswered_rcv_msg_count > M`, and will lose following messages.
+  - If sending member created messages from 4 as pending, and sent them upon receiving receipt from silent member, silent member would only receive them after sending member coming online. If they are in different time zones it may happen on next day.
+
+Same situation can occur even without step 1, simply by sending many messages while other member is offline.
+
+The problem is less acute the greater the difference between K and M, but making K >> M renders this whole mechanism obsolete, as we could then simply rely on QUOTA errors to mark group members inactive (and don't slow retry in agent?).
+
+Perhaps an acceptable way to solve this problem is to add a task to cleanup manager that would send receipts to all members on condition: (unanswered_rcv_msg_count > 0) && (last_reply_ts earlier than 1 day ago). (Adds last_reply_ts to tracking on receiving side). Perhaps it should be a task separate from cleanup manager that only occurs once per start, or with longer interval.
+
+\***
+
+Additionally we could consider group member connection as disabled with smaller AUTH error count. Currently it's 10 messages, could be 1.
+
+### Delivery suspension notice
+
+When receiving side comes back online, replies and continues to receive messages, it has no way of knowing there was a gap in messages from sending member. To notify receiving member about delivery suspension, sending member should send notice containing shared message id of the last sent message (new protocol event) to them:
+
+```haskell
+XGrpMemSuspended :: SharedMsgId -> ChatMsgEvent 'Json
+```
+
+Sending side additionally tracks:
+- xgrpmemsuspended_sent flag - to only send it once.
+
+When processing it, receiving member creates a "gap" chat item (e.g. event saying "member x suspended delivery to you due to your inactivity, there may be a gap in messages").
+
+After receiving member signals activity by sending any reply, sending member may send message history before continuing normal delivery.
+
+Starting point for message history: either receiving member could request history starting from specific shared message id (received in XGrpMemSuspended) with another new protocol event, or sending member can remember it instead of just flag.
+
+### Sending message history
+
+New protocol event:
+
+```haskell
+XGrpMsgHistory :: [ChatMessage 'Json] -> ChatMsgEvent 'Json
+```
+
+Sending member builds messages history starting starting from requested/remembered shared message id:
+- `messages` table is periodically cleaned up, so messages would be retrieved from `chat_items`.
+- if chat item for starting shared message id is not found (it may have been deleted manually or as a disappearing message), abort?
+  - sending member could track number of skipped messages per member, but again if any chat items were deleted, older (previously successfully sent) chat items would be retrieved, resulting in duplicate messages. If receiving member has also cleaned up records in `messages` table, they wouldn't be deduplicated.
+  - sending member could track timestamp of first unsent message instead of shared msg id.
+- sending member should probably limit maximum number of messages sent as history (100?).
+- only XMsgNew events should be sent in XGrpMsgHistory (chat items to be transformed back into text messages).
+  - updates, deletions would be reflected in chat item list.
+  - reactions would be omitted.
+  - files would be likely expired by the time of sending history, so only file name and size may be sent in FileInvitation, with invitation being practically not acceptable.
+    - add new flag to CIFile "expired" for receiving member to mark chat items created based on such invitations.
+    - FileInvitation in MsgContainer could also contain this flag as optional to explicitly communicate that only file metadata is sent.
+    - alternatively sending member could re-upload files, but this seems excessive.
+  - XMsgNew events don't include message timestamps (instead usually broker ts is retrieved from agent message meta), so receiving member wouldn't be able to restore them from history. Perhaps history should include XGrpMsgForward events containing XMsgNew events instead.
+- XGrpMsgHistory is likely to exceed message block limit.
+  - either multiple messages comprising a history can be batched as a single message on chat level until the block size is exceeded.
+  - or large history messages could be batched on agent level.
+
+\***
+
+Same XGrpMsgHistory protocol event could be sent by host to new members, after sending introductions.

docs/rfcs/2023-12-01-paginated-chat-previews.md

@@ -0,0 +1,35 @@
+# Paginated chat list
+
+## Problem
+
+The UI is requesting a fresh chat list when switching profiles.
+The `getChatPreviews` operation consists of a multiple DB queries fetching everything to show every item in the chat list.
+Together, they produce quite a bit of data for every contact the user ever had.
+This induces heavy load to bring up the data, marshall everything to UI and present it.
+The cost grows with time, starting from negligible, but becoming a massive drain and producing a noticable latency spike.
+Users who have many active profiles with constant traffic in all of them have their experience worsening despite having only a portion of contacts active in the momemnt.
+
+A simple "give next N after M" pagination is not enough here as chat list elements may break order by jumping to top when an `newChatItem` or alike message arrives.
+
+## Solution
+
+UI should turn to lazy list containers and pagination to delay loading yet invisible elements.
+To operate in this mode it needs to know a total amount of elements and the elements should have persistent IDs, unified across all chat types.
+
+A proposed API prepares a "spine" of such a list, to be paginated and loaded lazilly.
+Then, an item loader can request individual list elements that happen to enter the view.
+
+The current API element (of type `Chat`) contains a triple of `ChatInfo c`/`[CChatItem c]`/`ChatStats`.
+For lazy loading only a chat reference (composed from the `chatInfo.type` and an appropriate numeric ID) is needed.
+This is enough to populate list element with item proxies and inflate visible elements to a full `Chat` object.
+Incoming update events then can trigger their usual re-ordering, which may in turn trigger element update, if it comes into view.
+
+> `CRNewChatItem` only has `AChatItem` data, so it can resolve a proxy partially.
+> A call for item details may bring in missing data like `ChatInfo` and `ChatStats` later or immediately.
+
+So, the new API is two commands and no new types.
+
+- `APIGetChatList -> CRChatList [ChatRef]`
+- `APIGetChatDetails ChatRef -> CRChatDetails Chat`
+
+The UI should distinguish proxy elements containing only references from full elements and use platform APIs to request details when a proxy comes into view.

fourmolu.yaml

@@ -0,0 +1,30 @@
+indentation: 2
+column-limit: none
+function-arrows: trailing
+comma-style: trailing
+import-export-style: trailing
+indent-wheres: true
+record-brace-space: true
+newlines-between-decls: 1
+haddock-style: single-line
+haddock-style-module: null
+let-style: inline
+in-style: right-align
+single-constraint-parens: never
+unicode: never
+respectful: true
+fixities:
+  - infixr 9 .
+  - infixr 8 .:, .:., .=
+  - infixr 6 <>
+  - infixr 5 ++
+  - infixl 4 <$>, <$, $>,  <$$>, <$?>
+  - infixl 4 <*>, <*, *>, <**>
+  - infix 4 ==, /=
+  - infixr 3 &&
+  - infixl 3 <|>
+  - infixr 2 ||
+  - infixl 1 >>, >>=
+  - infixr 1 =<<, >=>, <=<
+  - infixr 0 $, $!
+reexports: []

package.yaml

@@ -32,10 +32,10 @@ dependencies:
   - filepath == 1.4.*
   - http-types == 0.12.*
   - http2 >= 4.2.2 && < 4.3
-  - memory == 0.18.*
-  - mtl == 2.3.*
+  - memory >= 0.15 && < 0.19
+  - mtl >= 2.2 && < 3
   - network >= 3.1.2.7 && < 3.2
-  - network-transport == 0.5.6
+  - network-transport >= 0.5.6 && < 0.6
   - optparse-applicative >= 0.15 && < 0.17
   - process == 1.6.*
   - random >= 1.1 && < 1.3
@@ -45,14 +45,14 @@ dependencies:
   - socks == 0.6.*
   - sqlcipher-simple == 0.4.*
   - stm == 2.5.*
-  - template-haskell == 2.20.*
+  - template-haskell >= 2.16 && < 2.21
   - terminal == 0.2.*
-  - text == 2.0.*
+  - text >= 2.0 && < 3
   - time == 1.9.*
   - tls >= 1.6.0 && < 1.7
   - unliftio == 0.2.*
   - unliftio-core == 0.2.*
-  - zip == 2.0.*
+  - zip >= 1.7 && < 2.1
 
 flags:
   swift:

packages/simplex-chat-client/typescript/src/response.ts

@@ -86,7 +86,6 @@ export type ChatResponse =
   | CRGroupUpdated
   | CRUserContactLinkSubscribed
   | CRUserContactLinkSubError
-  | CRNewContactConnection
   | CRContactConnectionDeleted
   | CRMessageError
   | CRChatCmdError
@@ -731,12 +730,6 @@ export interface CRUserContactLinkSubError extends CR {
   chatError: ChatError
 }
 
-export interface CRNewContactConnection extends CR {
-  type: "newContactConnection"
-  user: User
-  connection: PendingContactConnection
-}
-
 export interface CRContactConnectionDeleted extends CR {
   type: "contactConnectionDeleted"
   user: User

scripts/nix/sha256map.nix

@@ -1,5 +1,5 @@
 {
-  "https://github.com/simplex-chat/simplexmq.git"."757b7eec81341d8560a326deab303bb6fb6a26a3" = "0kqnxpyz8v43802fncqxdg6i2ni70yv7jg7a1nbkny1w937fwf40";
+  "https://github.com/simplex-chat/simplexmq.git"."90a8fc91d35c578c3b52ad296a6f1df715da2278" = "1yjixh6b2s1law3kh885fsbr1inv1r7iy4g9g2bn6j4ygdn8vlzy";
   "https://github.com/simplex-chat/hs-socks.git"."a30cc7a79a08d8108316094f8f2f82a0c5e1ac51" = "0yasvnr7g91k76mjkamvzab2kvlb1g5pspjyjn2fr6v83swjhj38";
   "https://github.com/kazu-yamamoto/http2.git"."f5525b755ff2418e6e6ecc69e877363b0d0bcaeb" = "0fyx0047gvhm99ilp212mmz37j84cwrfnpmssib5dw363fyb88b6";
   "https://github.com/simplex-chat/direct-sqlcipher.git"."f814ee68b16a9447fbb467ccc8f29bdd3546bfd9" = "1ql13f4kfwkbaq7nygkxgw84213i0zm7c1a8hwvramayxl38dq5d";
@@ -7,5 +7,4 @@
   "https://github.com/simplex-chat/aeson.git"."aab7b5a14d6c5ea64c64dcaee418de1bb00dcc2b" = "0jz7kda8gai893vyvj96fy962ncv8dcsx71fbddyy8zrvc88jfrr";
   "https://github.com/simplex-chat/haskell-terminal.git"."f708b00009b54890172068f168bf98508ffcd495" = "0zmq7lmfsk8m340g47g5963yba7i88n4afa6z93sg9px5jv1mijj";
   "https://github.com/simplex-chat/android-support.git"."9aa09f148089d6752ce563b14c2df1895718d806" = "0pbf2pf13v2kjzi397nr13f1h3jv0imvsq8rpiyy2qyx5vd50pqn";
-  "https://github.com/simplex-chat/network-transport.git"."0013798272a683e35ca38d2fdaf480942311fba8" = "0dnn62apgvc248df0m8ib7phrzn63wm0xs71xvlypv52j6cgwzkb";
 }

simplex-chat.cabal

@@ -124,6 +124,7 @@ library
       Simplex.Chat.Migrations.M20231107_indexes
       Simplex.Chat.Migrations.M20231113_group_forward
       Simplex.Chat.Migrations.M20231114_remote_control
+      Simplex.Chat.Migrations.M20231126_remote_ctrl_address
       Simplex.Chat.Mobile
       Simplex.Chat.Mobile.File
       Simplex.Chat.Mobile.Shared
@@ -183,10 +184,10 @@ library
     , filepath ==1.4.*
     , http-types ==0.12.*
     , http2 >=4.2.2 && <4.3
-    , memory ==0.18.*
-    , mtl ==2.3.*
+    , memory >=0.15 && <0.19
+    , mtl >=2.2 && <3
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.6
+    , network-transport >=0.5.6 && <0.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -196,14 +197,14 @@ library
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.20.*
+    , template-haskell >=2.16 && <2.21
     , terminal ==0.2.*
-    , text ==2.0.*
+    , text >=2.0 && <3
     , time ==1.9.*
     , tls >=1.6.0 && <1.7
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
-    , zip ==2.0.*
+    , zip >=1.7 && <2.1
   default-language: Haskell2010
   if flag(swift)
     cpp-options: -DswiftJSON
@@ -235,10 +236,10 @@ executable simplex-bot
     , filepath ==1.4.*
     , http-types ==0.12.*
     , http2 >=4.2.2 && <4.3
-    , memory ==0.18.*
-    , mtl ==2.3.*
+    , memory >=0.15 && <0.19
+    , mtl >=2.2 && <3
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.6
+    , network-transport >=0.5.6 && <0.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -249,14 +250,14 @@ executable simplex-bot
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.20.*
+    , template-haskell >=2.16 && <2.21
     , terminal ==0.2.*
-    , text ==2.0.*
+    , text >=2.0 && <3
     , time ==1.9.*
     , tls >=1.6.0 && <1.7
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
-    , zip ==2.0.*
+    , zip >=1.7 && <2.1
   default-language: Haskell2010
   if flag(swift)
     cpp-options: -DswiftJSON
@@ -288,10 +289,10 @@ executable simplex-bot-advanced
     , filepath ==1.4.*
     , http-types ==0.12.*
     , http2 >=4.2.2 && <4.3
-    , memory ==0.18.*
-    , mtl ==2.3.*
+    , memory >=0.15 && <0.19
+    , mtl >=2.2 && <3
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.6
+    , network-transport >=0.5.6 && <0.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -302,14 +303,14 @@ executable simplex-bot-advanced
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.20.*
+    , template-haskell >=2.16 && <2.21
     , terminal ==0.2.*
-    , text ==2.0.*
+    , text >=2.0 && <3
     , time ==1.9.*
     , tls >=1.6.0 && <1.7
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
-    , zip ==2.0.*
+    , zip >=1.7 && <2.1
   default-language: Haskell2010
   if flag(swift)
     cpp-options: -DswiftJSON
@@ -343,10 +344,10 @@ executable simplex-broadcast-bot
     , filepath ==1.4.*
     , http-types ==0.12.*
     , http2 >=4.2.2 && <4.3
-    , memory ==0.18.*
-    , mtl ==2.3.*
+    , memory >=0.15 && <0.19
+    , mtl >=2.2 && <3
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.6
+    , network-transport >=0.5.6 && <0.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -357,14 +358,14 @@ executable simplex-broadcast-bot
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.20.*
+    , template-haskell >=2.16 && <2.21
     , terminal ==0.2.*
-    , text ==2.0.*
+    , text >=2.0 && <3
     , time ==1.9.*
     , tls >=1.6.0 && <1.7
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
-    , zip ==2.0.*
+    , zip >=1.7 && <2.1
   default-language: Haskell2010
   if flag(swift)
     cpp-options: -DswiftJSON
@@ -397,10 +398,10 @@ executable simplex-chat
     , filepath ==1.4.*
     , http-types ==0.12.*
     , http2 >=4.2.2 && <4.3
-    , memory ==0.18.*
-    , mtl ==2.3.*
+    , memory >=0.15 && <0.19
+    , mtl >=2.2 && <3
     , network ==3.1.*
-    , network-transport ==0.5.6
+    , network-transport >=0.5.6 && <0.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -411,15 +412,15 @@ executable simplex-chat
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.20.*
+    , template-haskell >=2.16 && <2.21
     , terminal ==0.2.*
-    , text ==2.0.*
+    , text >=2.0 && <3
     , time ==1.9.*
     , tls >=1.6.0 && <1.7
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
     , websockets ==0.12.*
-    , zip ==2.0.*
+    , zip >=1.7 && <2.1
   default-language: Haskell2010
   if flag(swift)
     cpp-options: -DswiftJSON
@@ -455,10 +456,10 @@ executable simplex-directory-service
     , filepath ==1.4.*
     , http-types ==0.12.*
     , http2 >=4.2.2 && <4.3
-    , memory ==0.18.*
-    , mtl ==2.3.*
+    , memory >=0.15 && <0.19
+    , mtl >=2.2 && <3
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.6
+    , network-transport >=0.5.6 && <0.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -469,14 +470,14 @@ executable simplex-directory-service
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.20.*
+    , template-haskell >=2.16 && <2.21
     , terminal ==0.2.*
-    , text ==2.0.*
+    , text >=2.0 && <3
     , time ==1.9.*
     , tls >=1.6.0 && <1.7
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
-    , zip ==2.0.*
+    , zip >=1.7 && <2.1
   default-language: Haskell2010
   if flag(swift)
     cpp-options: -DswiftJSON
@@ -539,10 +540,10 @@ test-suite simplex-chat-test
     , hspec ==2.11.*
     , http-types ==0.12.*
     , http2 >=4.2.2 && <4.3
-    , memory ==0.18.*
-    , mtl ==2.3.*
+    , memory >=0.15 && <0.19
+    , mtl >=2.2 && <3
     , network ==3.1.*
-    , network-transport ==0.5.6
+    , network-transport >=0.5.6 && <0.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -554,14 +555,14 @@ test-suite simplex-chat-test
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.20.*
+    , template-haskell >=2.16 && <2.21
     , terminal ==0.2.*
-    , text ==2.0.*
+    , text >=2.0 && <3
     , time ==1.9.*
     , tls >=1.6.0 && <1.7
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
-    , zip ==2.0.*
+    , zip >=1.7 && <2.1
   default-language: Haskell2010
   if flag(swift)
     cpp-options: -DswiftJSON

src/Simplex/Chat/Archive.hs

@@ -22,7 +22,7 @@ import qualified Data.Text as T
 import qualified Database.SQLite3 as SQL
 import Simplex.Chat.Controller
 import Simplex.Messaging.Agent.Client (agentClientStore)
-import Simplex.Messaging.Agent.Store.SQLite (SQLiteStore (..), sqlString, closeSQLiteStore)
+import Simplex.Messaging.Agent.Store.SQLite (SQLiteStore (..), closeSQLiteStore, sqlString)
 import Simplex.Messaging.Util
 import System.FilePath
 import UnliftIO.Directory

src/Simplex/Chat/Bot/KnownContacts.hs

@@ -6,8 +6,8 @@ module Simplex.Chat.Bot.KnownContacts where
 import qualified Data.Attoparsec.ByteString.Char8 as A
 import Data.Int (Int64)
 import Data.Text (Text)
-import Data.Text.Encoding (encodeUtf8)
 import qualified Data.Text as T
+import Data.Text.Encoding (encodeUtf8)
 import Options.Applicative
 import Simplex.Messaging.Parsers (parseAll)
 import Simplex.Messaging.Util (safeDecodeUtf8)

src/Simplex/Chat/Call.hs

@@ -225,4 +225,3 @@ instance FromField CallState where
   fromField = fromTextField_ decodeJSON
 
 $(J.deriveJSON defaultJSON ''RcvCallInvitation)
-

src/Simplex/Chat/Controller.hs

@@ -1,5 +1,5 @@
-{-# LANGUAGE ConstraintKinds #-}
 {-# LANGUAGE CPP #-}
+{-# LANGUAGE ConstraintKinds #-}
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DuplicateRecordFields #-}
@@ -41,6 +41,7 @@ import Data.String
 import Data.Text (Text)
 import Data.Time (NominalDiffTime, UTCTime)
 import Data.Version (showVersion)
+import Data.Word (Word16)
 import Language.Haskell.TH (Exp, Q, runIO)
 import Numeric.Natural
 import qualified Paths_simplex_chat as SC
@@ -426,19 +427,19 @@ data ChatCommand
   | SetGroupTimedMessages GroupName (Maybe Int)
   | SetLocalDeviceName Text
   | ListRemoteHosts
-  | StartRemoteHost (Maybe (RemoteHostId, Bool)) -- ^ Start new or known remote host with optional multicast for known host
-  | SwitchRemoteHost (Maybe RemoteHostId) -- ^ Switch current remote host
-  | StopRemoteHost RHKey -- ^ Shut down a running session
-  | DeleteRemoteHost RemoteHostId -- ^ Unregister remote host and remove its data
+  | StartRemoteHost (Maybe (RemoteHostId, Bool)) (Maybe RCCtrlAddress) (Maybe Word16) -- Start new or known remote host with optional multicast for known host
+  | SwitchRemoteHost (Maybe RemoteHostId) -- Switch current remote host
+  | StopRemoteHost RHKey -- Shut down a running session
+  | DeleteRemoteHost RemoteHostId -- Unregister remote host and remove its data
   | StoreRemoteFile {remoteHostId :: RemoteHostId, storeEncrypted :: Maybe Bool, localPath :: FilePath}
   | GetRemoteFile {remoteHostId :: RemoteHostId, file :: RemoteFile}
-  | ConnectRemoteCtrl RCSignedInvitation -- ^ Connect new or existing controller via OOB data
-  | FindKnownRemoteCtrl -- ^ Start listening for announcements from all existing controllers
-  | ConfirmRemoteCtrl RemoteCtrlId -- ^ Confirm the connection with found controller
-  | VerifyRemoteCtrlSession Text -- ^ Verify remote controller session
+  | ConnectRemoteCtrl RCSignedInvitation -- Connect new or existing controller via OOB data
+  | FindKnownRemoteCtrl -- Start listening for announcements from all existing controllers
+  | ConfirmRemoteCtrl RemoteCtrlId -- Confirm the connection with found controller
+  | VerifyRemoteCtrlSession Text -- Verify remote controller session
   | ListRemoteCtrls
-  | StopRemoteCtrl -- ^ Stop listening for announcements or terminate an active session
-  | DeleteRemoteCtrl RemoteCtrlId -- ^ Remove all local data associated with a remote controller session
+  | StopRemoteCtrl -- Stop listening for announcements or terminate an active session
+  | DeleteRemoteCtrl RemoteCtrlId -- Remove all local data associated with a remote controller session
   | QuitChat
   | ShowVersion
   | DebugLocks
@@ -469,7 +470,7 @@ allowRemoteCommand = \case
   APIGetNetworkConfig -> False
   SetLocalDeviceName _ -> False
   ListRemoteHosts -> False
-  StartRemoteHost _ -> False
+  StartRemoteHost {} -> False
   SwitchRemoteHost {} -> False
   StoreRemoteFile {} -> False
   GetRemoteFile {} -> False
@@ -556,8 +557,8 @@ data ChatResponse
   | CRInvitation {user :: User, connReqInvitation :: ConnReqInvitation, connection :: PendingContactConnection}
   | CRConnectionIncognitoUpdated {user :: User, toConnection :: PendingContactConnection}
   | CRConnectionPlan {user :: User, connectionPlan :: ConnectionPlan}
-  | CRSentConfirmation {user :: User}
-  | CRSentInvitation {user :: User, customUserProfile :: Maybe Profile}
+  | CRSentConfirmation {user :: User, connection :: PendingContactConnection}
+  | CRSentInvitation {user :: User, connection :: PendingContactConnection, customUserProfile :: Maybe Profile}
   | CRSentInvitationToContact {user :: User, contact :: Contact, customUserProfile :: Maybe Profile}
   | CRContactUpdated {user :: User, fromContact :: Contact, toContact :: Contact}
   | CRGroupMemberUpdated {user :: User, groupInfo :: GroupInfo, fromMember :: GroupMember, toMember :: GroupMember}
@@ -654,11 +655,10 @@ data ChatResponse
   | CRNtfTokenStatus {status :: NtfTknStatus}
   | CRNtfToken {token :: DeviceToken, status :: NtfTknStatus, ntfMode :: NotificationsMode}
   | CRNtfMessages {user_ :: Maybe User, connEntity :: Maybe ConnectionEntity, msgTs :: Maybe UTCTime, ntfMessages :: [NtfMsgInfo]}
-  | CRNewContactConnection {user :: User, connection :: PendingContactConnection}
   | CRContactConnectionDeleted {user :: User, connection :: PendingContactConnection}
   | CRRemoteHostList {remoteHosts :: [RemoteHostInfo]}
   | CRCurrentRemoteHost {remoteHost_ :: Maybe RemoteHostInfo}
-  | CRRemoteHostStarted {remoteHost_ :: Maybe RemoteHostInfo, invitation :: Text, ctrlPort :: String}
+  | CRRemoteHostStarted {remoteHost_ :: Maybe RemoteHostInfo, invitation :: Text, ctrlPort :: String, localAddrs :: NonEmpty RCCtrlAddress}
   | CRRemoteHostSessionCode {remoteHost_ :: Maybe RemoteHostInfo, sessionCode :: Text}
   | CRNewRemoteHost {remoteHost :: RemoteHostInfo}
   | CRRemoteHostConnected {remoteHost :: RemoteHostInfo}
@@ -1072,32 +1072,33 @@ throwDBError = throwError . ChatErrorDatabase
 
 -- TODO review errors, some of it can be covered by HTTP2 errors
 data RemoteHostError
-  = RHEMissing -- ^ No remote session matches this identifier
-  | RHEInactive -- ^ A session exists, but not active
-  | RHEBusy -- ^ A session is already running
+  = RHEMissing -- No remote session matches this identifier
+  | RHEInactive -- A session exists, but not active
+  | RHEBusy -- A session is already running
   | RHETimeout
-  | RHEBadState -- ^ Illegal state transition
+  | RHEBadState -- Illegal state transition
   | RHEBadVersion {appVersion :: AppVersion}
-  | RHELocalCommand -- ^ Command not allowed for remote execution
+  | RHELocalCommand -- Command not allowed for remote execution
   | RHEDisconnected {reason :: Text} -- TODO should be sent when disconnected?
   | RHEProtocolError RemoteProtocolError
   deriving (Show, Exception)
 
 data RemoteHostStopReason
-  = RHSRConnectionFailed ChatError
-  | RHSRCrashed ChatError
+  = RHSRConnectionFailed {chatError :: ChatError}
+  | RHSRCrashed {chatError :: ChatError}
   | RHSRDisconnected
   deriving (Show, Exception)
 
 -- TODO review errors, some of it can be covered by HTTP2 errors
 data RemoteCtrlError
-  = RCEInactive -- ^ No session is running
-  | RCEBadState -- ^ A session is in a wrong state for the current operation
-  | RCEBusy -- ^ A session is already running
+  = RCEInactive -- No session is running
+  | RCEBadState -- A session is in a wrong state for the current operation
+  | RCEBusy -- A session is already running
   | RCETimeout
-  | RCENoKnownControllers -- ^ No previously-contacted controllers to discover
-  | RCEBadController -- ^ Attempting to confirm a found controller with another ID
-  | RCEDisconnected {remoteCtrlId :: RemoteCtrlId, reason :: Text} -- ^ A session disconnected by a controller
+  | RCENoKnownControllers -- No previously-contacted controllers to discover
+  | RCEBadController -- Attempting to confirm a found controller with another ID
+  | -- | A session disconnected by a controller
+    RCEDisconnected {remoteCtrlId :: RemoteCtrlId, reason :: Text}
   | RCEBadInvitation
   | RCEBadVersion {appVersion :: AppVersion}
   | RCEHTTP2Error {http2Error :: Text} -- TODO currently not used
@@ -1105,9 +1106,9 @@ data RemoteCtrlError
   deriving (Show, Exception)
 
 data RemoteCtrlStopReason
-  = RCSRDiscoveryFailed ChatError
-  | RCSRConnectionFailed ChatError
-  | RCSRSetupFailed ChatError
+  = RCSRDiscoveryFailed {chatError :: ChatError}
+  | RCSRConnectionFailed {chatError :: ChatError}
+  | RCSRSetupFailed {chatError :: ChatError}
   | RCSRDisconnected
   deriving (Show, Exception)
 
@@ -1223,8 +1224,8 @@ toView event = do
   session <- asks remoteCtrlSession
   atomically $
     readTVar session >>= \case
-      Just (_, RCSessionConnected {remoteOutputQ}) | allowRemoteEvent event ->
-        writeTBQueue remoteOutputQ event
+      Just (_, RCSessionConnected {remoteOutputQ})
+        | allowRemoteEvent event -> writeTBQueue remoteOutputQ event
       -- TODO potentially, it should hold some events while connecting
       _ -> writeTBQueue localQ (Nothing, Nothing, event)
 

src/Simplex/Chat/Core.hs

@@ -35,9 +35,9 @@ runSimplexChat :: ChatOpts -> User -> ChatController -> (User -> ChatController
 runSimplexChat ChatOpts {maintenance} u cc chat
   | maintenance = wait =<< async (chat u cc)
   | otherwise = do
-    a1 <- runReaderT (startChatController True True True) cc
-    a2 <- async $ chat u cc
-    waitEither_ a1 a2
+      a1 <- runReaderT (startChatController True True True) cc
+      a2 <- async $ chat u cc
+      waitEither_ a1 a2
 
 sendChatCmdStr :: ChatController -> String -> IO ChatResponse
 sendChatCmdStr cc s = runReaderT (execChatCommand Nothing . encodeUtf8 $ T.pack s) cc

src/Simplex/Chat/Files.hs

@@ -6,8 +6,8 @@ module Simplex.Chat.Files where
 import Control.Monad.IO.Class
 import Simplex.Chat.Controller
 import Simplex.Messaging.Util (ifM)
-import System.FilePath (splitExtensions, combine)
-import UnliftIO.Directory (doesFileExist, getTemporaryDirectory, getHomeDirectory, doesDirectoryExist)
+import System.FilePath (combine, splitExtensions)
+import UnliftIO.Directory (doesDirectoryExist, doesFileExist, getHomeDirectory, getTemporaryDirectory)
 
 uniqueCombine :: MonadIO m => FilePath -> String -> m FilePath
 uniqueCombine fPath fName = tryCombine (0 :: Int)

src/Simplex/Chat/Markdown.hs

@@ -19,7 +19,7 @@ import qualified Data.Attoparsec.Text as A
 import Data.Char (isDigit, isPunctuation)
 import Data.Either (fromRight)
 import Data.Functor (($>))
-import Data.List (intercalate, foldl')
+import Data.List (foldl', intercalate)
 import Data.List.NonEmpty (NonEmpty)
 import qualified Data.List.NonEmpty as L
 import Data.Maybe (fromMaybe, isNothing)
@@ -85,16 +85,18 @@ newtype FormatColor = FormatColor Color
   deriving (Eq, Show)
 
 instance FromJSON FormatColor where
-  parseJSON = J.withText "FormatColor" $ fmap FormatColor . \case
-    "red" -> pure Red
-    "green" -> pure Green
-    "blue" -> pure Blue
-    "yellow" -> pure Yellow
-    "cyan" -> pure Cyan
-    "magenta" -> pure Magenta
-    "black" -> pure Black
-    "white" -> pure White
-    unexpected -> fail $ "unexpected FormatColor: " <> show unexpected
+  parseJSON =
+    J.withText "FormatColor" $
+      fmap FormatColor . \case
+        "red" -> pure Red
+        "green" -> pure Green
+        "blue" -> pure Blue
+        "yellow" -> pure Yellow
+        "cyan" -> pure Cyan
+        "magenta" -> pure Magenta
+        "black" -> pure Black
+        "white" -> pure White
+        unexpected -> fail $ "unexpected FormatColor: " <> show unexpected
 
 instance ToJSON FormatColor where
   toJSON (FormatColor c) = case c of
@@ -167,14 +169,14 @@ markdownP = mconcat <$> A.many' fragmentP
     md :: Char -> Format -> Text -> Markdown
     md c f s
       | T.null s || T.head s == ' ' || T.last s == ' ' =
-        unmarked $ c `T.cons` s `T.snoc` c
+          unmarked $ c `T.cons` s `T.snoc` c
       | otherwise = markdown f s
     secretP :: Parser Markdown
     secretP = secret <$> A.takeWhile (== '#') <*> A.takeTill (== '#') <*> A.takeWhile (== '#')
     secret :: Text -> Text -> Text -> Markdown
     secret b s a
       | T.null a || T.null s || T.head s == ' ' || T.last s == ' ' =
-        unmarked $ '#' `T.cons` ss
+          unmarked $ '#' `T.cons` ss
       | otherwise = markdown Secret $ T.init ss
       where
         ss = b <> s <> a
@@ -215,9 +217,9 @@ markdownP = mconcat <$> A.many' fragmentP
     wordMD s
       | T.null s = unmarked s
       | isUri s =
-        let t = T.takeWhileEnd isPunctuation s
-            uri = uriMarkdown $ T.dropWhileEnd isPunctuation s
-         in if T.null t then uri else uri :|: unmarked t
+          let t = T.takeWhileEnd isPunctuation s
+              uri = uriMarkdown $ T.dropWhileEnd isPunctuation s
+           in if T.null t then uri else uri :|: unmarked t
       | isEmail s = markdown Email s
       | otherwise = unmarked s
     uriMarkdown s = case strDecode $ encodeUtf8 s of

src/Simplex/Chat/Messages.hs

@@ -11,7 +11,6 @@
 {-# LANGUAGE StandaloneDeriving #-}
 {-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE TypeApplications #-}
-
 {-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
 
 module Simplex.Chat.Messages where
@@ -44,7 +43,7 @@ import Simplex.Messaging.Agent.Protocol (AgentMsgId, MsgMeta (..), MsgReceiptSta
 import Simplex.Messaging.Crypto.File (CryptoFile (..))
 import qualified Simplex.Messaging.Crypto.File as CF
 import Simplex.Messaging.Encoding.String
-import Simplex.Messaging.Parsers (defaultJSON, dropPrefix, enumJSON, fromTextField_, parseAll, enumJSON, sumTypeJSON)
+import Simplex.Messaging.Parsers (defaultJSON, dropPrefix, enumJSON, fromTextField_, parseAll, sumTypeJSON)
 import Simplex.Messaging.Protocol (MsgBody)
 import Simplex.Messaging.Util (eitherToMaybe, safeDecodeUtf8, (<$?>))
 
@@ -345,7 +344,7 @@ contactTimedTTL Contact {mergedPreferences = ContactUserPreferences {timedMessag
   | forUser enabled && forContact enabled = Just ttl
   | otherwise = Nothing
   where
-    TimedMessagesPreference {ttl} =  userPreference.preference
+    TimedMessagesPreference {ttl} = userPreference.preference
 
 groupTimedTTL :: GroupInfo -> Maybe (Maybe Int)
 groupTimedTTL GroupInfo {fullGroupPreferences = FullGroupPreferences {timedMessages = TimedMessagesGroupPreference {enable, ttl}}}

src/Simplex/Chat/Messages/CIContent.hs

@@ -311,7 +311,7 @@ profileToText Profile {displayName, fullName} = displayName <> optionalFullName
 msgIntegrityError :: MsgErrorType -> Text
 msgIntegrityError = \case
   MsgSkipped fromId toId ->
-    "skipped message ID " <> tshow fromId
+    ("skipped message ID " <> tshow fromId)
       <> if fromId == toId then "" else ".." <> tshow toId
   MsgBadId msgId -> "unexpected message ID " <> tshow msgId
   MsgBadHash -> "incorrect message hash"

src/Simplex/Chat/Messages/CIContent/Events.hs

@@ -46,9 +46,9 @@ data SndConnEvent
   | SCERatchetSync {syncStatus :: RatchetSyncState, member :: Maybe GroupMemberRef}
   deriving (Show)
 
-data RcvDirectEvent =
-  -- RDEProfileChanged {...}
-  RDEContactDeleted
+data RcvDirectEvent
+  = -- RDEProfileChanged {...}
+    RDEContactDeleted
   deriving (Show)
 
 -- platform-specific JSON encoding (used in API)

src/Simplex/Chat/Migrations/M20231126_remote_ctrl_address.hs

@@ -0,0 +1,22 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Chat.Migrations.M20231126_remote_ctrl_address where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20231126_remote_ctrl_address :: Query
+m20231126_remote_ctrl_address =
+  [sql|
+ALTER TABLE remote_hosts ADD COLUMN bind_addr TEXT;
+ALTER TABLE remote_hosts ADD COLUMN bind_iface TEXT;
+ALTER TABLE remote_hosts ADD COLUMN bind_port INTEGER;
+|]
+
+down_m20231126_remote_ctrl_address :: Query
+down_m20231126_remote_ctrl_address =
+  [sql|
+ALTER TABLE remote_hosts DROP COLUMN bind_addr;
+ALTER TABLE remote_hosts DROP COLUMN bind_iface;
+ALTER TABLE remote_hosts DROP COLUMN bind_port;
+|]

src/Simplex/Chat/Migrations/chat_schema.sql

@@ -537,6 +537,10 @@ CREATE TABLE remote_hosts(
   id_key BLOB NOT NULL, -- long-term/identity signing key
   host_fingerprint BLOB NOT NULL, -- remote host CA cert fingerprint, set when connected
   host_dh_pub BLOB NOT NULL -- last session DH key
+  ,
+  bind_addr TEXT,
+  bind_iface TEXT,
+  bind_port INTEGER
 );
 CREATE TABLE remote_controllers(
   -- e.g., desktops known to a mobile app

src/Simplex/Chat/Mobile.hs

@@ -4,13 +4,12 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE TypeApplications #-}
-
 {-# OPTIONS_GHC -fobject-code #-}
 
 module Simplex.Chat.Mobile where
 
 import Control.Concurrent.STM
-import Control.Exception (catch, SomeException)
+import Control.Exception (SomeException, catch)
 import Control.Monad.Except
 import Control.Monad.Reader
 import qualified Data.Aeson as J
@@ -31,7 +30,7 @@ import Foreign.C.Types (CInt (..))
 import Foreign.Ptr
 import Foreign.StablePtr
 import Foreign.Storable (poke)
-import GHC.IO.Encoding (setLocaleEncoding, setFileSystemEncoding, setForeignEncoding)
+import GHC.IO.Encoding (setFileSystemEncoding, setForeignEncoding, setLocaleEncoding)
 import Simplex.Chat
 import Simplex.Chat.Controller
 import Simplex.Chat.Markdown (ParsedMarkdown (..), parseMaybeMarkdownList)
@@ -219,7 +218,7 @@ chatMigrateInit dbFilePrefix dbKey confirm = runExceptT $ do
       ExceptT $
         (first (DBMErrorMigration dbFile) <$> createStore dbFile dbKey confirmMigrations)
           `catch` (pure . checkDBError)
-            `catchAll` (pure . dbError)
+          `catchAll` (pure . dbError)
       where
         checkDBError e = case sqlError e of
           DB.ErrorNotADatabase -> Left $ DBMErrorNotADatabase dbFile
@@ -233,7 +232,7 @@ chatCloseStore ChatController {chatStore, smpAgent} = handleErr $ do
 
 handleErr :: IO () -> IO String
 handleErr a = (a $> "") `catch` (pure . show @SomeException)
-  
+
 chatSendCmd :: ChatController -> B.ByteString -> IO JSONByteString
 chatSendCmd cc = chatSendRemoteCmd cc Nothing
 

src/Simplex/Chat/Mobile/Shared.hs

@@ -6,8 +6,8 @@ import qualified Data.ByteString as B
 import Data.ByteString.Internal (ByteString (..), memcpy)
 import qualified Data.ByteString.Lazy as LB
 import qualified Data.ByteString.Lazy.Internal as LB
-import Foreign.C (CInt, CString)
 import Foreign
+import Foreign.C (CInt, CString)
 
 type CJSONString = CString
 

src/Simplex/Chat/Mobile/WebRTC.hs

@@ -1,12 +1,12 @@
 {-# LANGUAGE FlexibleContexts #-}
 
-module Simplex.Chat.Mobile.WebRTC (
-  cChatEncryptMedia,
-  cChatDecryptMedia,
-  chatEncryptMedia,
-  chatDecryptMedia,
-  reservedSize,
-) where
+module Simplex.Chat.Mobile.WebRTC
+  ( cChatEncryptMedia,
+    cChatDecryptMedia,
+    chatEncryptMedia,
+    chatDecryptMedia,
+    reservedSize,
+  ) where
 
 import Control.Monad
 import Control.Monad.Except
@@ -21,8 +21,8 @@ import Data.Either (fromLeft)
 import Data.Word (Word8)
 import Foreign.C (CInt, CString, newCAString)
 import Foreign.Ptr (Ptr)
-import qualified Simplex.Messaging.Crypto as C
 import Simplex.Chat.Mobile.Shared
+import qualified Simplex.Messaging.Crypto as C
 
 cChatEncryptMedia :: CString -> Ptr Word8 -> CInt -> IO CString
 cChatEncryptMedia = cTransformMedia chatEncryptMedia

src/Simplex/Chat/Options.hs

@@ -206,7 +206,6 @@ chatOptsP appDir defaultDbFileName = do
     optional $
       strOption
         ( long "device-name"
-            <> short 'e'
             <> metavar "DEVICE"
             <> help "Device name to use in connections with remote hosts and controller"
         )

src/Simplex/Chat/ProfileGenerator.hs

@@ -18,10 +18,10 @@ generateRandomProfile = do
     pickNoun adjective n
       | n == 0 = pick nouns
       | otherwise = do
-        noun <- pick nouns
-        if noun == adjective
-          then pickNoun adjective (n - 1)
-          else pure noun
+          noun <- pick nouns
+          if noun == adjective
+            then pickNoun adjective (n - 1)
+            else pure noun
 
 adjectives :: [Text]
 adjectives =

src/Simplex/Chat/Protocol.hs

@@ -13,7 +13,6 @@
 {-# LANGUAGE StrictData #-}
 {-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE TypeApplications #-}
-
 {-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
 
 module Simplex.Chat.Protocol where

src/Simplex/Chat/Remote.hs

@@ -26,13 +26,14 @@ import qualified Data.ByteString.Base64.URL as B64U
 import Data.ByteString.Builder (Builder)
 import qualified Data.ByteString.Char8 as B
 import Data.Functor (($>))
-import Data.List.NonEmpty (nonEmpty)
+import Data.List.NonEmpty (NonEmpty, nonEmpty)
+import qualified Data.List.NonEmpty as L
 import qualified Data.Map.Strict as M
 import Data.Maybe (fromMaybe, isJust)
 import Data.Text (Text)
 import qualified Data.Text as T
 import Data.Text.Encoding (decodeLatin1, encodeUtf8)
-import Data.Word (Word32)
+import Data.Word (Word16, Word32)
 import qualified Network.HTTP.Types as N
 import Network.HTTP2.Server (responseStreaming)
 import qualified Paths_simplex_chat as SC
@@ -97,24 +98,26 @@ discoveryTimeout = 60000000
 getRemoteHostClient :: ChatMonad m => RemoteHostId -> m RemoteHostClient
 getRemoteHostClient rhId = do
   sessions <- asks remoteHostSessions
-  liftIOEither . atomically $ TM.lookup rhKey sessions >>= \case
-    Just (_, RHSessionConnected {rhClient}) -> pure $ Right rhClient
-    Just _ -> pure . Left $ ChatErrorRemoteHost rhKey RHEBadState
-    Nothing -> pure . Left $ ChatErrorRemoteHost rhKey RHEMissing
+  liftIOEither . atomically $
+    TM.lookup rhKey sessions >>= \case
+      Just (_, RHSessionConnected {rhClient}) -> pure $ Right rhClient
+      Just _ -> pure . Left $ ChatErrorRemoteHost rhKey RHEBadState
+      Nothing -> pure . Left $ ChatErrorRemoteHost rhKey RHEMissing
   where
     rhKey = RHId rhId
 
 withRemoteHostSession :: ChatMonad m => RHKey -> SessionSeq -> (RemoteHostSession -> Either ChatError (a, RemoteHostSession)) -> m a
 withRemoteHostSession rhKey sseq f = do
   sessions <- asks remoteHostSessions
-  r <- atomically $
-    TM.lookup rhKey sessions >>= \case
-      Nothing -> pure . Left $ ChatErrorRemoteHost rhKey RHEMissing
-      Just (stateSeq, state)
-        | stateSeq /= sseq -> pure . Left $ ChatErrorRemoteHost rhKey RHEBadState
-        | otherwise -> case f state of
-            Right (r, newState) -> Right r <$ TM.insert rhKey (sseq, newState) sessions
-            Left ce -> pure $ Left ce
+  r <-
+    atomically $
+      TM.lookup rhKey sessions >>= \case
+        Nothing -> pure . Left $ ChatErrorRemoteHost rhKey RHEMissing
+        Just (stateSeq, state)
+          | stateSeq /= sseq -> pure . Left $ ChatErrorRemoteHost rhKey RHEBadState
+          | otherwise -> case f state of
+              Right (r, newState) -> Right r <$ TM.insert rhKey (sseq, newState) sessions
+              Left ce -> pure $ Left ce
   liftEither r
 
 -- | Transition session state with a 'RHNew' ID to an assigned 'RemoteHostId'
@@ -133,8 +136,8 @@ setNewRemoteHostId sseq rhId = do
   where
     err = pure . Left . ChatErrorRemoteHost RHNew
 
-startRemoteHost :: ChatMonad m => Maybe (RemoteHostId, Bool) -> m (Maybe RemoteHostInfo, RCSignedInvitation)
-startRemoteHost rh_ = do
+startRemoteHost :: ChatMonad m => Maybe (RemoteHostId, Bool) -> Maybe RCCtrlAddress -> Maybe Word16 -> m (NonEmpty RCCtrlAddress, Maybe RemoteHostInfo, RCSignedInvitation)
+startRemoteHost rh_ rcAddrPrefs_ port_ = do
   (rhKey, multicast, remoteHost_, pairing) <- case rh_ of
     Just (rhId, multicast) -> do
       rh@RemoteHost {hostPairing} <- withStore $ \db -> getRemoteHost db rhId
@@ -142,19 +145,20 @@ startRemoteHost rh_ = do
     Nothing -> (RHNew,False,Nothing,) <$> rcNewHostPairing
   sseq <- startRemoteHostSession rhKey
   ctrlAppInfo <- mkCtrlAppInfo
-  (invitation, rchClient, vars) <- handleConnectError rhKey sseq . withAgent $ \a -> rcConnectHost a pairing (J.toJSON ctrlAppInfo) multicast
+  (localAddrs, invitation, rchClient, vars) <- handleConnectError rhKey sseq . withAgent $ \a -> rcConnectHost a pairing (J.toJSON ctrlAppInfo) multicast rcAddrPrefs_ port_
+  let rcAddr_ = L.head localAddrs <$ rcAddrPrefs_
   cmdOk <- newEmptyTMVarIO
   rhsWaitSession <- async $ do
     rhKeyVar <- newTVarIO rhKey
     atomically $ takeTMVar cmdOk
-    handleHostError sseq rhKeyVar $ waitForHostSession remoteHost_ rhKey sseq rhKeyVar vars
+    handleHostError sseq rhKeyVar $ waitForHostSession remoteHost_ rhKey sseq rcAddr_ rhKeyVar vars
   let rhs = RHPendingSession {rhKey, rchClient, rhsWaitSession, remoteHost_}
   withRemoteHostSession rhKey sseq $ \case
     RHSessionStarting ->
       let inv = decodeLatin1 $ strEncode invitation
        in Right ((), RHSessionConnecting inv rhs)
     _ -> Left $ ChatErrorRemoteHost rhKey RHEBadState
-  (remoteHost_, invitation) <$ atomically (putTMVar cmdOk ())
+  (localAddrs, remoteHost_, invitation) <$ atomically (putTMVar cmdOk ())
   where
     mkCtrlAppInfo = do
       deviceName <- chatReadVar localDeviceName
@@ -167,16 +171,18 @@ startRemoteHost rh_ = do
       when (encoding == PEKotlin && localEncoding == PESwift) $ throwError $ RHEProtocolError RPEIncompatibleEncoding
       pure hostInfo
     handleConnectError :: ChatMonad m => RHKey -> SessionSeq -> m a -> m a
-    handleConnectError rhKey sessSeq action = action `catchChatError` \err -> do
-      logError $ "startRemoteHost.rcConnectHost crashed: " <> tshow err
-      cancelRemoteHostSession (Just (sessSeq, RHSRConnectionFailed err)) rhKey
-      throwError err
+    handleConnectError rhKey sessSeq action =
+      action `catchChatError` \err -> do
+        logError $ "startRemoteHost.rcConnectHost crashed: " <> tshow err
+        cancelRemoteHostSession (Just (sessSeq, RHSRConnectionFailed err)) rhKey
+        throwError err
     handleHostError :: ChatMonad m => SessionSeq -> TVar RHKey -> m () -> m ()
-    handleHostError sessSeq rhKeyVar action = action `catchChatError` \err -> do
-      logError $ "startRemoteHost.waitForHostSession crashed: " <> tshow err
-      readTVarIO rhKeyVar >>= cancelRemoteHostSession (Just (sessSeq, RHSRCrashed err))
-    waitForHostSession :: ChatMonad m => Maybe RemoteHostInfo -> RHKey -> SessionSeq -> TVar RHKey -> RCStepTMVar (ByteString, TLS, RCStepTMVar (RCHostSession, RCHostHello, RCHostPairing)) -> m ()
-    waitForHostSession remoteHost_ rhKey sseq rhKeyVar vars = do
+    handleHostError sessSeq rhKeyVar action =
+      action `catchChatError` \err -> do
+        logError $ "startRemoteHost.waitForHostSession crashed: " <> tshow err
+        readTVarIO rhKeyVar >>= cancelRemoteHostSession (Just (sessSeq, RHSRCrashed err))
+    waitForHostSession :: ChatMonad m => Maybe RemoteHostInfo -> RHKey -> SessionSeq -> Maybe RCCtrlAddress -> TVar RHKey -> RCStepTMVar (ByteString, TLS, RCStepTMVar (RCHostSession, RCHostHello, RCHostPairing)) -> m ()
+    waitForHostSession remoteHost_ rhKey sseq rcAddr_ rhKeyVar vars = do
       (sessId, tls, vars') <- timeoutThrow (ChatErrorRemoteHost rhKey RHETimeout) 60000000 $ takeRCStep vars
       let sessionCode = verificationCode sessId
       withRemoteHostSession rhKey sseq $ \case
@@ -190,7 +196,7 @@ startRemoteHost rh_ = do
       withRemoteHostSession rhKey sseq $ \case
         RHSessionPendingConfirmation _ tls' rhs' -> Right ((), RHSessionConfirmed tls' rhs')
         _ -> Left $ ChatErrorRemoteHost rhKey RHEBadState
-      rhi@RemoteHostInfo {remoteHostId, storePath} <- upsertRemoteHost pairing' rh_' hostDeviceName sseq RHSConfirmed {sessionCode}
+      rhi@RemoteHostInfo {remoteHostId, storePath} <- upsertRemoteHost pairing' rh_' rcAddr_ hostDeviceName sseq RHSConfirmed {sessionCode}
       let rhKey' = RHId remoteHostId -- rhKey may be invalid after upserting on RHNew
       when (rhKey' /= rhKey) $ do
         atomically $ writeTVar rhKeyVar rhKey'
@@ -205,17 +211,17 @@ startRemoteHost rh_ = do
         _ -> Left $ ChatErrorRemoteHost rhKey RHEBadState
       chatWriteVar currentRemoteHost $ Just remoteHostId -- this is required for commands to be passed to remote host
       toView $ CRRemoteHostConnected rhi {sessionState = Just RHSConnected {sessionCode}}
-    upsertRemoteHost :: ChatMonad m => RCHostPairing -> Maybe RemoteHostInfo -> Text -> SessionSeq -> RemoteHostSessionState -> m RemoteHostInfo
-    upsertRemoteHost pairing'@RCHostPairing {knownHost = kh_} rhi_ hostDeviceName sseq state = do
+    upsertRemoteHost :: ChatMonad m => RCHostPairing -> Maybe RemoteHostInfo -> Maybe RCCtrlAddress -> Text -> SessionSeq -> RemoteHostSessionState -> m RemoteHostInfo
+    upsertRemoteHost pairing'@RCHostPairing {knownHost = kh_} rhi_ rcAddr_ hostDeviceName sseq state = do
       KnownHostPairing {hostDhPubKey = hostDhPubKey'} <- maybe (throwError . ChatError $ CEInternalError "KnownHost is known after verification") pure kh_
       case rhi_ of
         Nothing -> do
           storePath <- liftIO randomStorePath
-          rh@RemoteHost {remoteHostId} <- withStore $ \db -> insertRemoteHost db hostDeviceName storePath pairing' >>= getRemoteHost db
+          rh@RemoteHost {remoteHostId} <- withStore $ \db -> insertRemoteHost db hostDeviceName storePath rcAddr_ port_ pairing' >>= getRemoteHost db
           setNewRemoteHostId sseq remoteHostId
           pure $ remoteHostInfo rh $ Just state
         Just rhi@RemoteHostInfo {remoteHostId} -> do
-          withStore' $ \db -> updateHostPairing db remoteHostId hostDeviceName hostDhPubKey'
+          withStore' $ \db -> updateHostPairing db remoteHostId hostDeviceName hostDhPubKey' rcAddr_ port_
           pure (rhi :: RemoteHostInfo) {sessionState = Just state}
     onDisconnected :: ChatMonad m => RHKey -> SessionSeq -> m ()
     onDisconnected rhKey sseq = do
@@ -250,14 +256,15 @@ cancelRemoteHostSession :: ChatMonad m => Maybe (SessionSeq, RemoteHostStopReaso
 cancelRemoteHostSession handlerInfo_ rhKey = do
   sessions <- asks remoteHostSessions
   crh <- asks currentRemoteHost
-  deregistered <- atomically $
-    TM.lookup rhKey sessions >>= \case
-      Nothing -> pure Nothing
-      Just (sessSeq, _) | maybe False (/= sessSeq) (fst <$> handlerInfo_) -> pure Nothing -- ignore cancel from a ghost session handler
-      Just (_, rhs) -> do
-        TM.delete rhKey sessions
-        modifyTVar' crh $ \cur -> if (RHId <$> cur) == Just rhKey then Nothing else cur -- only wipe the closing RH
-        pure $ Just rhs
+  deregistered <-
+    atomically $
+      TM.lookup rhKey sessions >>= \case
+        Nothing -> pure Nothing
+        Just (sessSeq, _) | maybe False (/= sessSeq) (fst <$> handlerInfo_) -> pure Nothing -- ignore cancel from a ghost session handler
+        Just (_, rhs) -> do
+          TM.delete rhKey sessions
+          modifyTVar' crh $ \cur -> if (RHId <$> cur) == Just rhKey then Nothing else cur -- only wipe the closing RH
+          pure $ Just rhs
   forM_ deregistered $ \session -> do
     liftIO $ cancelRemoteHost handlingError session `catchAny` (logError . tshow)
     forM_ (snd <$> handlerInfo_) $ \rhStopReason ->
@@ -312,8 +319,8 @@ switchRemoteHost rhId_ = do
   rhi_ <$ chatWriteVar currentRemoteHost rhId_
 
 remoteHostInfo :: RemoteHost -> Maybe RemoteHostSessionState -> RemoteHostInfo
-remoteHostInfo RemoteHost {remoteHostId, storePath, hostDeviceName} sessionState =
-  RemoteHostInfo {remoteHostId, storePath, hostDeviceName, sessionState}
+remoteHostInfo RemoteHost {remoteHostId, storePath, hostDeviceName, bindAddress_, bindPort_} sessionState =
+  RemoteHostInfo {remoteHostId, storePath, hostDeviceName, bindAddress_, bindPort_, sessionState}
 
 deleteRemoteHost :: ChatMonad m => RemoteHostId -> m ()
 deleteRemoteHost rhId = do
@@ -401,9 +408,10 @@ findKnownRemoteCtrl = do
     (RCCtrlPairing {ctrlFingerprint}, inv@(RCVerifiedInvitation RCInvitation {app})) <-
       timeoutThrow (ChatErrorRemoteCtrl RCETimeout) discoveryTimeout . withAgent $ \a -> rcDiscoverCtrl a pairings
     ctrlAppInfo_ <- (Just <$> parseCtrlAppInfo app) `catchChatError` const (pure Nothing)
-    rc <- withStore' (`getRemoteCtrlByFingerprint` ctrlFingerprint) >>= \case
-      Nothing -> throwChatError $ CEInternalError "connecting with a stored ctrl"
-      Just rc  -> pure rc
+    rc <-
+      withStore' (`getRemoteCtrlByFingerprint` ctrlFingerprint) >>= \case
+        Nothing -> throwChatError $ CEInternalError "connecting with a stored ctrl"
+        Just rc -> pure rc
     atomically $ putTMVar foundCtrl (rc, inv)
     let compatible = isJust $ compatibleAppVersion hostAppVersionRange . appVersionRange =<< ctrlAppInfo_
     toView CRRemoteCtrlFound {remoteCtrl = remoteCtrlInfo rc (Just RCSSearching), ctrlAppInfo_, appVersion = currentAppVersion, compatible}
@@ -422,7 +430,7 @@ confirmRemoteCtrl rcId = do
         pure $ Right (sseq, action, foundCtrl)
       _ -> pure . Left $ ChatErrorRemoteCtrl RCEBadState
   uninterruptibleCancel listener
-  (RemoteCtrl{remoteCtrlId = foundRcId}, verifiedInv) <- atomically $ takeTMVar found
+  (RemoteCtrl {remoteCtrlId = foundRcId}, verifiedInv) <- atomically $ takeTMVar found
   unless (rcId == foundRcId) $ throwError $ ChatErrorRemoteCtrl RCEBadController
   connectRemoteCtrl verifiedInv sseq >>= \case
     (Nothing, _) -> throwChatError $ CEInternalError "connecting with a stored ctrl"
@@ -647,10 +655,12 @@ handleCtrlError sseq mkReason name action =
 cancelActiveRemoteCtrl :: ChatMonad m => Maybe (SessionSeq, RemoteCtrlStopReason) -> m ()
 cancelActiveRemoteCtrl handlerInfo_ = handleAny (logError . tshow) $ do
   var <- asks remoteCtrlSession
-  session_ <- atomically $ readTVar var >>= \case
-    Nothing -> pure Nothing
-    Just (oldSeq, _) | maybe False (/= oldSeq) (fst <$> handlerInfo_) -> pure Nothing
-    Just (_, s) -> Just s <$ writeTVar var Nothing
+  session_ <-
+    atomically $
+      readTVar var >>= \case
+        Nothing -> pure Nothing
+        Just (oldSeq, _) | (maybe False ((oldSeq /=) . fst) handlerInfo_) -> pure Nothing
+        Just (_, s) -> Just s <$ writeTVar var Nothing
   forM_ session_ $ \session -> do
     liftIO $ cancelRemoteCtrl handlingError session
     forM_ (snd <$> handlerInfo_) $ \rcStopReason ->

src/Simplex/Chat/Remote/AppVersion.hs

@@ -11,7 +11,7 @@ module Simplex.Chat.Remote.AppVersion
     compatibleAppVersion,
     isAppCompatible,
   )
-  where
+where
 
 import Data.Aeson (FromJSON (..), ToJSON (..))
 import qualified Data.Aeson as J

src/Simplex/Chat/Remote/Multicast.hsc

@@ -6,10 +6,8 @@ import Network.Socket
 
 #include <HsNet.h>
 
-{- | Toggle multicast group membership.
-
-NB: Group membership is per-host, not per-process. A socket is only used to access system interface for groups.
--}
+-- | Toggle multicast group membership.
+-- NB: Group membership is per-host, not per-process. A socket is only used to access system interface for groups.
 setMembership :: Socket -> HostAddress -> Bool -> IO (Either CInt ())
 setMembership sock group membership = allocaBytes #{size struct ip_mreq} $ \mReqPtr -> do
   #{poke struct ip_mreq, imr_multiaddr} mReqPtr group

src/Simplex/Chat/Remote/Protocol.hs

@@ -6,8 +6,8 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PatternSynonyms #-}
 {-# LANGUAGE TemplateHaskell #-}
-{-# LANGUAGE TypeApplications #-}
 {-# LANGUAGE TupleSections #-}
+{-# LANGUAGE TypeApplications #-}
 
 module Simplex.Chat.Remote.Protocol where
 
@@ -41,16 +41,16 @@ import Simplex.FileTransfer.Description (FileDigest (..))
 import Simplex.Messaging.Agent.Client (agentDRG)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Crypto.File (CryptoFile (..))
-import Simplex.Messaging.Crypto.Lazy  (LazyByteString)
+import Simplex.Messaging.Crypto.Lazy (LazyByteString)
 import Simplex.Messaging.Encoding
 import Simplex.Messaging.Parsers (dropPrefix, taggedObjectJSON, pattern SingleFieldJSONTag, pattern TaggedObjectJSONData, pattern TaggedObjectJSONTag)
 import Simplex.Messaging.Transport.Buffer (getBuffered)
 import Simplex.Messaging.Transport.HTTP2 (HTTP2Body (..), HTTP2BodyChunk, getBodyChunk)
 import Simplex.Messaging.Transport.HTTP2.Client (HTTP2Client, HTTP2Response (..), closeHTTP2Client, sendRequestDirect)
 import Simplex.Messaging.Util (liftEitherError, liftEitherWith, liftError, tshow)
-import Simplex.RemoteControl.Types (CtrlSessKeys (..), HostSessKeys (..), RCErrorType (..), SessionCode)
 import Simplex.RemoteControl.Client (xrcpBlockSize)
 import qualified Simplex.RemoteControl.Client as RC
+import Simplex.RemoteControl.Types (CtrlSessKeys (..), HostSessKeys (..), RCErrorType (..), SessionCode)
 import System.FilePath (takeFileName, (</>))
 import UnliftIO
 
@@ -64,10 +64,10 @@ data RemoteCommand
 
 data RemoteResponse
   = RRChatResponse {chatResponse :: ChatResponse}
-  | RRChatEvent {chatEvent :: Maybe ChatResponse} -- ^ 'Nothing' on poll timeout
+  | RRChatEvent {chatEvent :: Maybe ChatResponse} -- 'Nothing' on poll timeout
   | RRFileStored {filePath :: String}
   | RRFile {fileSize :: Word32, fileDigest :: FileDigest} -- provides attachment , fileDigest :: FileDigest
-  | RRProtocolError {remoteProcotolError :: RemoteProtocolError} -- ^ The protocol error happened on the server side
+  | RRProtocolError {remoteProcotolError :: RemoteProtocolError} -- The protocol error happened on the server side
   deriving (Show)
 
 -- Force platform-independent encoding as the types aren't UI-visible
@@ -126,7 +126,7 @@ remoteStoreFile c localPath fileName = do
     r -> badResponse r
 
 remoteGetFile :: RemoteHostClient -> FilePath -> RemoteFile -> ExceptT RemoteProtocolError IO ()
-remoteGetFile c@RemoteHostClient{encryption} destDir rf@RemoteFile {fileSource = CryptoFile {filePath}} =
+remoteGetFile c@RemoteHostClient {encryption} destDir rf@RemoteFile {fileSource = CryptoFile {filePath}} =
   sendRemoteCommand c Nothing RCGetFile {file = rf} >>= \case
     (getChunk, RRFile {fileSize, fileDigest}) -> do
       -- TODO we could optimize by checking size and hash before receiving the file
@@ -140,7 +140,7 @@ sendRemoteCommand' c attachment_ rc = snd <$> sendRemoteCommand c attachment_ rc
 
 sendRemoteCommand :: RemoteHostClient -> Maybe (Handle, Word32) -> RemoteCommand -> ExceptT RemoteProtocolError IO (Int -> IO ByteString, RemoteResponse)
 sendRemoteCommand RemoteHostClient {httpClient, hostEncoding, encryption} file_ cmd = do
-  encFile_ <- mapM (prepareEncryptedFile encryption) file_ 
+  encFile_ <- mapM (prepareEncryptedFile encryption) file_
   req <- httpRequest encFile_ <$> encryptEncodeHTTP2Body encryption (J.encode cmd)
   HTTP2Response {response, respBody} <- liftEitherError (RPEHTTP2 . tshow) $ sendRequestDirect httpClient req Nothing
   (header, getNext) <- parseDecryptHTTP2Body encryption response respBody

src/Simplex/Chat/Remote/Transport.hs

@@ -5,15 +5,15 @@ module Simplex.Chat.Remote.Transport where
 
 import Control.Monad
 import Control.Monad.Except
-import Data.ByteString.Builder (Builder, byteString)
 import Data.ByteString (ByteString)
+import Data.ByteString.Builder (Builder, byteString)
 import qualified Data.ByteString.Lazy as LB
 import Data.Word (Word32)
-import Simplex.FileTransfer.Description (FileDigest (..))
 import Simplex.Chat.Remote.Types
+import Simplex.FileTransfer.Description (FileDigest (..))
+import Simplex.FileTransfer.Transport (ReceiveFileError (..), receiveSbFile, sendEncFile)
 import qualified Simplex.Messaging.Crypto as C
 import qualified Simplex.Messaging.Crypto.Lazy as LC
-import Simplex.FileTransfer.Transport (ReceiveFileError (..), receiveSbFile, sendEncFile)
 import Simplex.Messaging.Encoding
 import Simplex.Messaging.Util (liftEitherError, liftEitherWith)
 import Simplex.RemoteControl.Types (RCErrorType (..))

src/Simplex/Chat/Remote/Types.hs

@@ -18,16 +18,17 @@ import qualified Data.Aeson.TH as J
 import Data.ByteString (ByteString)
 import Data.Int (Int64)
 import Data.Text (Text)
+import Data.Word (Word16)
 import Simplex.Chat.Remote.AppVersion
 import Simplex.Chat.Types (verificationCode)
 import qualified Simplex.Messaging.Crypto as C
+import Simplex.Messaging.Crypto.File (CryptoFile)
 import Simplex.Messaging.Crypto.SNTRUP761 (KEMHybridSecret)
 import Simplex.Messaging.Parsers (defaultJSON, dropPrefix, enumJSON, sumTypeJSON)
+import Simplex.Messaging.Transport (TLS (..))
 import Simplex.Messaging.Transport.HTTP2.Client (HTTP2Client)
 import Simplex.RemoteControl.Client
 import Simplex.RemoteControl.Types
-import Simplex.Messaging.Crypto.File (CryptoFile)
-import Simplex.Messaging.Transport (TLS (..))
 
 data RemoteHostClient = RemoteHostClient
   { hostEncoding :: PlatformEncoding,
@@ -48,13 +49,13 @@ data RemoteCrypto = RemoteCrypto
 
 data RemoteSignatures
   = RSSign
-    { idPrivKey :: C.PrivateKeyEd25519,
-      sessPrivKey :: C.PrivateKeyEd25519
-    }
+      { idPrivKey :: C.PrivateKeyEd25519,
+        sessPrivKey :: C.PrivateKeyEd25519
+      }
   | RSVerify
-    { idPubKey :: C.PublicKeyEd25519,
-      sessPubKey :: C.PublicKeyEd25519
-    }
+      { idPubKey :: C.PublicKeyEd25519,
+        sessPubKey :: C.PublicKeyEd25519
+      }
 
 type SessionSeq = Int
 
@@ -71,12 +72,12 @@ data RemoteHostSession
   | RHSessionPendingConfirmation {sessionCode :: Text, tls :: TLS, rhPendingSession :: RHPendingSession}
   | RHSessionConfirmed {tls :: TLS, rhPendingSession :: RHPendingSession}
   | RHSessionConnected
-    { rchClient :: RCHostClient,
-      tls :: TLS,
-      rhClient :: RemoteHostClient,
-      pollAction :: Async (),
-      storePath :: FilePath
-    }
+      { rchClient :: RCHostClient,
+        tls :: TLS,
+        rhClient :: RemoteHostClient,
+        pollAction :: Async (),
+        storePath :: FilePath
+      }
 
 data RemoteHostSessionState
   = RHSStarting
@@ -128,6 +129,8 @@ data RemoteHost = RemoteHost
   { remoteHostId :: RemoteHostId,
     hostDeviceName :: Text,
     storePath :: FilePath,
+    bindAddress_ :: Maybe RCCtrlAddress,
+    bindPort_ :: Maybe Word16,
     hostPairing :: RCHostPairing
   }
 
@@ -136,6 +139,8 @@ data RemoteHostInfo = RemoteHostInfo
   { remoteHostId :: RemoteHostId,
     hostDeviceName :: Text,
     storePath :: FilePath,
+    bindAddress_ :: Maybe RCCtrlAddress,
+    bindPort_ :: Maybe Word16,
     sessionState :: Maybe RemoteHostSessionState
   }
   deriving (Show)
@@ -158,6 +163,7 @@ data PlatformEncoding
   deriving (Show, Eq)
 
 localEncoding :: PlatformEncoding
+
 #if defined(darwin_HOST_OS) && defined(swiftJSON)
 localEncoding = PESwift
 #else

src/Simplex/Chat/Store/Connections.hs

@@ -4,7 +4,6 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE QuasiQuotes #-}
 {-# LANGUAGE TypeOperators #-}
-
 {-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
 
 module Simplex.Chat.Store.Connections
@@ -25,11 +24,11 @@ import Data.Text (Text)
 import Data.Time.Clock (UTCTime (..))
 import Database.SQLite.Simple (Only (..), (:.) (..))
 import Database.SQLite.Simple.QQ (sql)
+import Simplex.Chat.Protocol
 import Simplex.Chat.Store.Files
 import Simplex.Chat.Store.Groups
 import Simplex.Chat.Store.Profiles
 import Simplex.Chat.Store.Shared
-import Simplex.Chat.Protocol
 import Simplex.Chat.Types
 import Simplex.Chat.Types.Preferences
 import Simplex.Messaging.Agent.Protocol (ConnId)
@@ -157,8 +156,9 @@ getConnectionEntity db user@User {userId, userContactId} agentConnId = do
 
 getConnectionEntityByConnReq :: DB.Connection -> User -> (ConnReqInvitation, ConnReqInvitation) -> IO (Maybe ConnectionEntity)
 getConnectionEntityByConnReq db user@User {userId} (cReqSchema1, cReqSchema2) = do
-  connId_ <- maybeFirstRow fromOnly $
-    DB.query db "SELECT agent_conn_id FROM connections WHERE user_id = ? AND conn_req_inv IN (?,?) LIMIT 1" (userId, cReqSchema1, cReqSchema2)
+  connId_ <-
+    maybeFirstRow fromOnly $
+      DB.query db "SELECT agent_conn_id FROM connections WHERE user_id = ? AND conn_req_inv IN (?,?) LIMIT 1" (userId, cReqSchema1, cReqSchema2)
   maybe (pure Nothing) (fmap eitherToMaybe . runExceptT . getConnectionEntity db user) connId_
 
 -- search connection for connection plan:
@@ -167,21 +167,22 @@ getConnectionEntityByConnReq db user@User {userId} (cReqSchema1, cReqSchema2) =
 -- deleted connections are filtered out to allow re-connecting via same contact address
 getContactConnEntityByConnReqHash :: DB.Connection -> User -> (ConnReqUriHash, ConnReqUriHash) -> IO (Maybe ConnectionEntity)
 getContactConnEntityByConnReqHash db user@User {userId} (cReqHash1, cReqHash2) = do
-  connId_ <- maybeFirstRow fromOnly $
-    DB.query
-      db
-      [sql|
-        SELECT agent_conn_id FROM (
-          SELECT
-            agent_conn_id,
-            (CASE WHEN contact_id IS NOT NULL THEN 1 ELSE 0 END) AS conn_ord
-          FROM connections
-          WHERE user_id = ? AND via_contact_uri_hash IN (?,?) AND conn_status != ?
-          ORDER BY conn_ord DESC, created_at DESC
-          LIMIT 1
-        )
-      |]
-      (userId, cReqHash1, cReqHash2, ConnDeleted)
+  connId_ <-
+    maybeFirstRow fromOnly $
+      DB.query
+        db
+        [sql|
+          SELECT agent_conn_id FROM (
+            SELECT
+              agent_conn_id,
+              (CASE WHEN contact_id IS NOT NULL THEN 1 ELSE 0 END) AS conn_ord
+            FROM connections
+            WHERE user_id = ? AND via_contact_uri_hash IN (?,?) AND conn_status != ?
+            ORDER BY conn_ord DESC, created_at DESC
+            LIMIT 1
+          )
+        |]
+        (userId, cReqHash1, cReqHash2, ConnDeleted)
   maybe (pure Nothing) (fmap eitherToMaybe . runExceptT . getConnectionEntity db user) connId_
 
 getConnectionsToSubscribe :: DB.Connection -> IO ([ConnId], [ConnectionEntity])

src/Simplex/Chat/Store/Direct.hs

@@ -1,13 +1,12 @@
 {-# LANGUAGE DuplicateRecordFields #-}
-{-# LANGUAGE OverloadedRecordDot #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedRecordDot #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE QuasiQuotes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TupleSections #-}
-
 {-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
 
 module Simplex.Chat.Store.Direct
@@ -310,14 +309,14 @@ deleteUnusedProfile_ db userId profileId =
 updateContactProfile :: DB.Connection -> User -> Contact -> Profile -> ExceptT StoreError IO Contact
 updateContactProfile db user@User {userId} c p'
   | displayName == newName = do
-    liftIO $ updateContactProfile_ db userId profileId p'
-    pure c {profile, mergedPreferences}
+      liftIO $ updateContactProfile_ db userId profileId p'
+      pure c {profile, mergedPreferences}
   | otherwise =
-    ExceptT . withLocalDisplayName db userId newName $ \ldn -> do
-      currentTs <- getCurrentTime
-      updateContactProfile_' db userId profileId p' currentTs
-      updateContact_ db userId contactId localDisplayName ldn currentTs
-      pure $ Right c {localDisplayName = ldn, profile, mergedPreferences}
+      ExceptT . withLocalDisplayName db userId newName $ \ldn -> do
+        currentTs <- getCurrentTime
+        updateContactProfile_' db userId profileId p' currentTs
+        updateContact_ db userId contactId localDisplayName ldn currentTs
+        pure $ Right c {localDisplayName = ldn, profile, mergedPreferences}
   where
     Contact {contactId, localDisplayName, profile = LocalProfile {profileId, displayName, localAlias}, userPreferences} = c
     Profile {displayName = newName, preferences} = p'
@@ -784,10 +783,8 @@ updateConnectionStatus :: DB.Connection -> Connection -> ConnStatus -> IO ()
 updateConnectionStatus db Connection {connId} connStatus = do
   currentTs <- getCurrentTime
   if connStatus == ConnReady
-    then
-      DB.execute db "UPDATE connections SET conn_status = ?, updated_at = ?, conn_req_inv = NULL WHERE connection_id = ?" (connStatus, currentTs, connId)
-    else
-      DB.execute db "UPDATE connections SET conn_status = ?, updated_at = ? WHERE connection_id = ?" (connStatus, currentTs, connId)
+    then DB.execute db "UPDATE connections SET conn_status = ?, updated_at = ?, conn_req_inv = NULL WHERE connection_id = ?" (connStatus, currentTs, connId)
+    else DB.execute db "UPDATE connections SET conn_status = ?, updated_at = ? WHERE connection_id = ?" (connStatus, currentTs, connId)
 
 updateContactSettings :: DB.Connection -> User -> Int64 -> ChatSettings -> IO ()
 updateContactSettings db User {userId} contactId ChatSettings {enableNtfs, sendRcpts, favorite} =
@@ -816,4 +813,3 @@ resetContactConnInitiated db User {userId} Connection {connId} = do
       WHERE user_id = ? AND connection_id = ?
     |]
     (updatedAt, userId, connId)
-

src/Simplex/Chat/Store/Files.hs

@@ -109,7 +109,7 @@ import Simplex.Messaging.Protocol (SubscriptionMode (..))
 
 getLiveSndFileTransfers :: DB.Connection -> User -> IO [SndFileTransfer]
 getLiveSndFileTransfers db User {userId} = do
-  cutoffTs <- addUTCTime (- week) <$> getCurrentTime
+  cutoffTs <- addUTCTime (-week) <$> getCurrentTime
   fileIds :: [Int64] <-
     map fromOnly
       <$> DB.query
@@ -132,7 +132,7 @@ getLiveSndFileTransfers db User {userId} = do
 
 getLiveRcvFileTransfers :: DB.Connection -> User -> IO [RcvFileTransfer]
 getLiveRcvFileTransfers db user@User {userId} = do
-  cutoffTs <- addUTCTime (- week) <$> getCurrentTime
+  cutoffTs <- addUTCTime (-week) <$> getCurrentTime
   fileIds :: [Int64] <-
     map fromOnly
       <$> DB.query
@@ -234,11 +234,12 @@ createSndGroupInlineFT db GroupMember {groupMemberId, localDisplayName = n} Conn
 
 updateSndDirectFTDelivery :: DB.Connection -> Contact -> FileTransferMeta -> Int64 -> ExceptT StoreError IO ()
 updateSndDirectFTDelivery _ Contact {localDisplayName, activeConn = Nothing} _ _ = throwError $ SEContactNotReady localDisplayName
-updateSndDirectFTDelivery db Contact {activeConn = Just Connection {connId}} FileTransferMeta {fileId} msgDeliveryId = liftIO $
-  DB.execute
-    db
-    "UPDATE snd_files SET last_inline_msg_delivery_id = ? WHERE connection_id = ? AND file_id = ? AND file_inline IS NOT NULL"
-    (msgDeliveryId, connId, fileId)
+updateSndDirectFTDelivery db Contact {activeConn = Just Connection {connId}} FileTransferMeta {fileId} msgDeliveryId =
+  liftIO $
+    DB.execute
+      db
+      "UPDATE snd_files SET last_inline_msg_delivery_id = ? WHERE connection_id = ? AND file_id = ? AND file_inline IS NOT NULL"
+      (msgDeliveryId, connId, fileId)
 
 updateSndGroupFTDelivery :: DB.Connection -> GroupMember -> Connection -> FileTransferMeta -> Int64 -> IO ()
 updateSndGroupFTDelivery db GroupMember {groupMemberId} Connection {connId} FileTransferMeta {fileId} msgDeliveryId =
@@ -724,7 +725,7 @@ removeFileCryptoArgs db fileId = do
 
 getRcvFilesToReceive :: DB.Connection -> User -> IO [RcvFileTransfer]
 getRcvFilesToReceive db user@User {userId} = do
-  cutoffTs <- addUTCTime (- (2 * nominalDay)) <$> getCurrentTime
+  cutoffTs <- addUTCTime (-(2 * nominalDay)) <$> getCurrentTime
   fileIds :: [Int64] <-
     map fromOnly
       <$> DB.query
@@ -768,20 +769,20 @@ createRcvFileChunk db RcvFileTransfer {fileId, fileInvitation = FileInvitation {
       pure $ case map fromOnly ns of
         []
           | chunkNo == 1 ->
-            if chunkSize >= fileSize
-              then RcvChunkFinal
-              else RcvChunkOk
+              if chunkSize >= fileSize
+                then RcvChunkFinal
+                else RcvChunkOk
           | otherwise -> RcvChunkError
         n : _
           | chunkNo == n -> RcvChunkDuplicate
           | chunkNo == n + 1 ->
-            let prevSize = n * chunkSize
-             in if prevSize >= fileSize
-                  then RcvChunkError
-                  else
-                    if prevSize + chunkSize >= fileSize
-                      then RcvChunkFinal
-                      else RcvChunkOk
+              let prevSize = n * chunkSize
+               in if prevSize >= fileSize
+                    then RcvChunkError
+                    else
+                      if prevSize + chunkSize >= fileSize
+                        then RcvChunkFinal
+                        else RcvChunkOk
           | otherwise -> RcvChunkError
 
 updatedRcvFileChunkStored :: DB.Connection -> RcvFileTransfer -> Integer -> IO ()