Allow manual CI dispatch

Fix security audit findings: 3 critical, 7 high

.github/workflows/swift-tests.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - main
   pull_request:
+  workflow_dispatch:
 
 jobs:
   test:
@@ -29,17 +30,24 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v5
 
-      - name: Set up Swift
-        uses: swift-actions/setup-swift@v2
+      - name: Compute Swift cache salt
+        id: swift_cache_salt
+        run: |
+          {
+            swift --version
+            xcrun --show-sdk-platform-path
+            xcrun --show-sdk-version
+            xcodebuild -version
+          } | shasum -a 256 | awk '{ print "value=" $1 }' >> "$GITHUB_OUTPUT"
 
       - name: Cache build artifacts
         uses: actions/cache@v4
         with:
           path: ${{ matrix.path }}/.build
-          key: ${{ runner.os }}-${{ matrix.name }}-${{ hashFiles(format('{0}/**/*.swift', matrix.path), format('{0}/**/Package.resolved', matrix.path)) }}
+          key: ${{ runner.os }}-${{ runner.arch }}-${{ matrix.name }}-${{ steps.swift_cache_salt.outputs.value }}-${{ hashFiles(format('{0}/**/*.swift', matrix.path), format('{0}/**/Package.resolved', matrix.path)) }}
           restore-keys: |
-            ${{ runner.os }}-${{ matrix.name }}-${{ hashFiles(format('{0}/**/Package.resolved', matrix.path)) }}
-            ${{ runner.os }}-${{ matrix.name }}-
+            ${{ runner.os }}-${{ runner.arch }}-${{ matrix.name }}-${{ steps.swift_cache_salt.outputs.value }}-${{ hashFiles(format('{0}/**/Package.resolved', matrix.path)) }}
+            ${{ runner.os }}-${{ runner.arch }}-${{ matrix.name }}-${{ steps.swift_cache_salt.outputs.value }}-
 
       - name: Build tests
         # Built separately so the hang watchdog below times only test

Configs/Release.xcconfig

@@ -1,4 +1,4 @@
-MARKETING_VERSION = 1.5.2
+MARKETING_VERSION = 1.5.3
 CURRENT_PROJECT_VERSION = 1
 
 IPHONEOS_DEPLOYMENT_TARGET = 16.0

bitchat.xcodeproj/project.pbxproj

@@ -561,7 +561,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 1.5.2;
+				MARKETING_VERSION = 1.5.3;
 				PRODUCT_BUNDLE_IDENTIFIER = "$(PRODUCT_BUNDLE_IDENTIFIER)";
 				PRODUCT_NAME = bitchat;
 				SDKROOT = iphoneos;
@@ -620,7 +620,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 1.5.2;
+				MARKETING_VERSION = 1.5.3;
 				PRODUCT_BUNDLE_IDENTIFIER = "$(PRODUCT_BUNDLE_IDENTIFIER)";
 				PRODUCT_NAME = bitchat;
 				SDKROOT = iphoneos;
@@ -655,7 +655,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = "$(MACOSX_DEPLOYMENT_TARGET)";
-				MARKETING_VERSION = 1.5.2;
+				MARKETING_VERSION = 1.5.3;
 				PRODUCT_BUNDLE_IDENTIFIER = "$(PRODUCT_BUNDLE_IDENTIFIER)";
 				PRODUCT_NAME = bitchat;
 				REGISTER_APP_GROUPS = YES;
@@ -749,7 +749,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = "$(MACOSX_DEPLOYMENT_TARGET)";
-				MARKETING_VERSION = 1.5.2;
+				MARKETING_VERSION = 1.5.3;
 				PRODUCT_BUNDLE_IDENTIFIER = "$(PRODUCT_BUNDLE_IDENTIFIER)";
 				PRODUCT_NAME = bitchat;
 				REGISTER_APP_GROUPS = YES;

bitchat/Identity/SecureIdentityStateManager.swift

@@ -151,38 +151,68 @@ final class SecureIdentityStateManager: SecureIdentityStateManagerProtocol {
     // Thread safety
     private let queue = DispatchQueue(label: "bitchat.identity.state", attributes: .concurrent)
     
-    // Debouncing for keychain saves
-    private var saveTimer: Timer?
-    private let saveDebounceInterval: TimeInterval = 2.0  // Save at most once every 2 seconds
+    // Pending-save coalescing flag. Reads/writes are serialized on `queue`.
+    // Persistence is done with a fire-and-forget `queue.async(.barrier)` rather
+    // than a retained DispatchSourceTimer: a lingering, never-cancelled timer
+    // keeps the dispatch machinery alive and prevents the unit-test process from
+    // exiting. (The original code used Timer.scheduledTimer on a GCD queue with
+    // no run loop, so saves never actually fired.)
     private var pendingSave = false
-    
+
     // Encryption key
     private let encryptionKey: SymmetricKey
+    /// True when `encryptionKey` is a throwaway generated this session because the
+    /// persisted key could not be read (device locked / access denied). In that
+    /// state we must NOT persist (it would overwrite the real cache with data the
+    /// next launch can't decrypt) and must NOT delete the existing cache.
+    private let encryptionKeyIsEphemeral: Bool
     
     init(_ keychain: KeychainManagerProtocol) {
         self.keychain = keychain
-        
-        // Generate or retrieve encryption key from keychain
+
+        // Retrieve (or, only on genuine first run, generate) the cache
+        // encryption key. We MUST distinguish "key doesn't exist yet" from a
+        // transient failure (device locked / access denied): the legacy
+        // getIdentityKey(forKey:) collapses both to nil, and generating+saving a
+        // new key deletes the existing one first — permanently orphaning the
+        // encrypted cache on a launch that merely couldn't read the key.
         let loadedKey: SymmetricKey
-        
-        // Try to load from keychain
-        if let keyData = keychain.getIdentityKey(forKey: encryptionKeyName) {
+        let keyIsEphemeral: Bool
+
+        switch keychain.getIdentityKeyWithResult(forKey: encryptionKeyName) {
+        case .success(let keyData):
             loadedKey = SymmetricKey(data: keyData)
+            keyIsEphemeral = false
             SecureLogger.logKeyOperation(.load, keyType: "identity cache encryption key", success: true)
-        }
-        // Generate new key if needed
-        else {
-            loadedKey = SymmetricKey(size: .bits256)
-            let keyData = loadedKey.withUnsafeBytes { Data($0) }
-            // Save to keychain
+
+        case .itemNotFound:
+            // Genuine first run: generate and persist a new key.
+            let newKey = SymmetricKey(size: .bits256)
+            let keyData = newKey.withUnsafeBytes { Data($0) }
             let saved = keychain.saveIdentityKey(keyData, forKey: encryptionKeyName)
+            loadedKey = newKey
+            // If even the save failed, treat the key as ephemeral so we don't
+            // later try to persist a cache the next launch can't read.
+            keyIsEphemeral = !saved
             SecureLogger.logKeyOperation(.generate, keyType: "identity cache encryption key", success: saved)
+
+        case .deviceLocked, .authenticationFailed, .accessDenied, .otherError:
+            // Transient/critical read failure. Do NOT overwrite the persisted
+            // key. Use a session-only ephemeral key; the real key and cache are
+            // left intact for a healthy launch.
+            SecureLogger.warning("Identity cache key unavailable; using ephemeral key for this session (not persisting)", category: .security)
+            loadedKey = SymmetricKey(size: .bits256)
+            keyIsEphemeral = true
         }
-        
+
         self.encryptionKey = loadedKey
-        
-        // Load identity cache on init
-        loadIdentityCache()
+        self.encryptionKeyIsEphemeral = keyIsEphemeral
+
+        // Only read the persisted cache when we hold the real key; with an
+        // ephemeral key the decrypt would fail and discard the real cache.
+        if !keyIsEphemeral {
+            loadIdentityCache()
+        }
     }
     
     deinit {
@@ -211,23 +241,28 @@ final class SecureIdentityStateManager: SecureIdentityStateManagerProtocol {
         }
     }
     
+    /// Persists the cache. Always invoked on `queue` under a barrier (its callers
+    /// run inside `queue.async(.barrier)`), so it simply marks the cache dirty
+    /// and persists it on the same serialized context — no timer, nothing left
+    /// scheduled to keep the process alive.
     private func saveIdentityCache() {
-        // Mark that we need to save
         pendingSave = true
-        
-        // Cancel any existing timer
-        saveTimer?.invalidate()
-        
-        // Schedule a new save after the debounce interval
-        saveTimer = Timer.scheduledTimer(withTimeInterval: saveDebounceInterval, repeats: false) { [weak self] _ in
-            self?.performSave()
-        }
+        performSave()
     }
-    
+
+    /// Writes the cache to the keychain. Must run on `queue` with exclusive
+    /// (barrier) access.
     private func performSave() {
         guard pendingSave else { return }
         pendingSave = false
-        
+
+        // Never persist under an ephemeral key — it would overwrite the real
+        // cache with data the next launch cannot decrypt.
+        guard !encryptionKeyIsEphemeral else {
+            SecureLogger.debug("Skipping identity cache save (ephemeral key this session)", category: .security)
+            return
+        }
+
         do {
             let data = try JSONEncoder().encode(cache)
             let sealedBox = try AES.GCM.seal(data, using: encryptionKey)
@@ -239,10 +274,14 @@ final class SecureIdentityStateManager: SecureIdentityStateManagerProtocol {
             SecureLogger.error(error, context: "Failed to save identity cache", category: .security)
         }
     }
-    
-    // Force immediate save (for app termination)
+
+    // Force immediate save (for app termination / lifecycle events). Mutations
+    // already persist synchronously via saveIdentityCache, so this is normally a
+    // no-op (performSave early-returns when nothing is pending). Runs directly on
+    // the caller's thread — deliberately NOT a `queue.sync(barrier)`, which is
+    // reachable from `deinit` and from async tests on the swift-concurrency
+    // cooperative pool where a blocking barrier-sync can starve/deadlock it.
     func forceSave() {
-        saveTimer?.invalidate()
         performSave()
     }
     

bitchat/Models/RequestSyncPacket.swift

@@ -4,6 +4,9 @@ import Foundation
 //  - 0x01: P (uint8) — Golomb-Rice parameter
 //  - 0x02: M (uint32, big-endian) — hash range (N * 2^P)
 //  - 0x03: data (opaque) — GR bitstream bytes (MSB-first)
+//  - 0x04: wanted types — raw MessageType bytes
+//  - 0x05: minimum timestamp (uint64, big-endian) — epoch milliseconds
+//  - 0x06: fragment id filter (utf8)
 struct RequestSyncPacket {
     let p: Int
     let m: UInt32

bitchat/Noise/NoiseProtocol.swift

@@ -322,6 +322,13 @@ final class NoiseCipherState {
                 throw NoiseError.replayDetected
             }
             
+            // The 4-byte nonce prefix has been stripped, so the remaining bytes
+            // must still hold at least the 16-byte Poly1305 tag. The up-front
+            // `ciphertext.count >= 16` guard is not sufficient here (it counts
+            // the nonce), and `prefix(count - 16)` would trap on a short payload.
+            guard actualCiphertext.count >= 16 else {
+                throw NoiseError.invalidCiphertext
+            }
             // Split ciphertext and tag
             encryptedData = actualCiphertext.prefix(actualCiphertext.count - 16)
             tag = actualCiphertext.suffix(16)

bitchat/Nostr/NostrIdentityBridge.swift

@@ -82,6 +82,13 @@ final class NostrIdentityBridge {
         }
 
         deviceSeedCache = nil
+        // Also drop the in-memory derived per-geohash identities. These hold the
+        // actual secp256k1 private keys; if left cached, post-panic geohash
+        // messages would still be signed with pre-panic keys (linkable across the
+        // wipe) until the app is force-quit.
+        cacheLock.lock()
+        derivedIdentityCache.removeAll()
+        cacheLock.unlock()
     }
 
     // MARK: - Per-Geohash Identities (Location Channels)

bitchat/Nostr/NostrProtocol.swift

@@ -39,22 +39,23 @@ struct NostrProtocol {
             content: content
         )
         
-        // 2. Create ephemeral key for this message
-        let ephemeralKey = try P256K.Schnorr.PrivateKey()
-        // Created ephemeral key for seal
-        
-        // 3. Seal the rumor (encrypt to recipient)
+        // 2. Seal the rumor (encrypt to recipient) and sign it with the SENDER'S
+        //    real identity key. NIP-17 requires the seal be signed by the sender
+        //    so the recipient can authenticate who sent the message; signing with
+        //    a throwaway key leaves DMs forgeable/impersonatable.
+        let senderKey = try senderIdentity.schnorrSigningKey()
         let sealedEvent = try createSeal(
             rumor: rumor,
             recipientPubkey: recipientPubkey,
-            senderKey: ephemeralKey
+            senderKey: senderKey
         )
-        
-        // 4. Gift wrap the sealed event (encrypt to recipient again)
+
+        // 3. Gift wrap the sealed event with a throwaway ephemeral key (the wrap
+        //    layer hides the sender's identity from relays; createGiftWrap mints
+        //    its own ephemeral key internally).
         let giftWrap = try createGiftWrap(
             seal: sealedEvent,
-            recipientPubkey: recipientPubkey,
-            senderKey: ephemeralKey
+            recipientPubkey: recipientPubkey
         )
         
         // Created gift wrap
@@ -84,7 +85,15 @@ struct NostrProtocol {
             throw error
         }
         
-        // 2. Open the seal
+        // 2. Authenticate the seal. The seal MUST be signed by the sender's real
+        //    identity key (NIP-17); without this check a DM is forgeable by anyone
+        //    who knows the recipient's npub. Verify the seal's own signature.
+        guard seal.isValidSignature() else {
+            SecureLogger.error("❌ Rejecting DM: seal signature is missing or invalid", category: .session)
+            throw NostrError.invalidEvent
+        }
+
+        // 3. Open the seal
         let rumor: NostrEvent
         do {
             rumor = try openSeal(
@@ -96,10 +105,63 @@ struct NostrProtocol {
             SecureLogger.error("❌ Failed to open seal: \(error)", category: .session)
             throw error
         }
-        
-        return (content: rumor.content, senderPubkey: rumor.pubkey, timestamp: rumor.created_at)
+
+        // 4. The sender claimed inside the rumor must match the key that actually
+        //    signed the seal, otherwise the sender field is unauthenticated and
+        //    spoofable.
+        guard seal.pubkey == rumor.pubkey else {
+            SecureLogger.error("❌ Rejecting DM: rumor pubkey does not match seal signer", category: .session)
+            throw NostrError.invalidEvent
+        }
+
+        // Return the seal signer's pubkey as the authenticated sender.
+        return (content: rumor.content, senderPubkey: seal.pubkey, timestamp: rumor.created_at)
     }
 
+    #if DEBUG
+    static func createPrivateMessageWithInvalidSealSignatureForTesting(
+        content: String,
+        recipientPubkey: String,
+        senderIdentity: NostrIdentity
+    ) throws -> NostrEvent {
+        let rumor = NostrEvent(
+            pubkey: senderIdentity.publicKeyHex,
+            createdAt: Date(),
+            kind: .dm,
+            tags: [],
+            content: content
+        )
+        var seal = try createSeal(
+            rumor: rumor,
+            recipientPubkey: recipientPubkey,
+            senderKey: senderIdentity.schnorrSigningKey()
+        )
+        seal.sig = String(repeating: "0", count: 128)
+        return try createGiftWrap(seal: seal, recipientPubkey: recipientPubkey)
+    }
+
+    static func createPrivateMessageWithMismatchedSealRumorPubkeyForTesting(
+        content: String,
+        recipientPubkey: String,
+        rumorIdentity: NostrIdentity,
+        sealSignerIdentity: NostrIdentity
+    ) throws -> NostrEvent {
+        let rumor = NostrEvent(
+            pubkey: rumorIdentity.publicKeyHex,
+            createdAt: Date(),
+            kind: .dm,
+            tags: [],
+            content: content
+        )
+        let seal = try createSeal(
+            rumor: rumor,
+            recipientPubkey: recipientPubkey,
+            senderKey: sealSignerIdentity.schnorrSigningKey()
+        )
+        return try createGiftWrap(seal: seal, recipientPubkey: recipientPubkey)
+    }
+    #endif
+
     /// Create a geohash-scoped ephemeral public message (kind 20000)
     static func createEphemeralGeohashEvent(
         content: String,
@@ -195,10 +257,9 @@ struct NostrProtocol {
     
     private static func createGiftWrap(
         seal: NostrEvent,
-        recipientPubkey: String,
-        senderKey: P256K.Schnorr.PrivateKey  // This is the ephemeral key used for the seal
+        recipientPubkey: String
     ) throws -> NostrEvent {
-        
+
         let sealJSON = try seal.jsonString()
         
         // Create new ephemeral key for gift wrap

bitchat/Nostr/NostrRelayManager.swift

@@ -281,6 +281,7 @@ final class NostrRelayManager: ObservableObject {
             task.cancel(with: .goingAway, reason: nil)
         }
         connections.removeAll()
+        markRelaySocketsClosed(resetState: false)
         // Sockets are gone, so per-relay subscription state is cleared — but
         // durable intent (subscriptionRequestState, messageHandlers, parked
         // EOSE callbacks) is kept so REQs replay when relays reconnect
@@ -298,6 +299,60 @@ final class NostrRelayManager: ObservableObject {
         torReadyWaitAttempts = 0
         updateConnectionStatus()
     }
+
+    /// Panic wipe reset: close sockets and drop every user/session-specific
+    /// relay intent without invoking old callbacks. Unlike `disconnect()`, this
+    /// must not preserve subscription replay state because geohash DM handlers
+    /// can capture pre-wipe Nostr private keys.
+    func resetForPanicWipe() {
+        connectionGeneration &+= 1
+        for (_, task) in connections {
+            task.cancel(with: .goingAway, reason: nil)
+        }
+        connections.removeAll()
+        markRelaySocketsClosed(resetState: true)
+        subscriptions.removeAll()
+        pendingSubscriptions.removeAll()
+        messageHandlers.removeAll()
+        subscriptionRequestState.removeAll()
+        subscribeCoalesce.removeAll()
+        eoseTrackers.removeAll()
+        pendingEOSECallbacks.removeAll()
+        pendingTorConnectionURLs.removeAll()
+        awaitingTorForConnections = false
+        torReadyWaitAttempts = 0
+        recentInboundEventKeys.removeAll()
+        recentInboundEventKeyOrder.removeAll()
+        duplicateInboundEventDropCount = 0
+        duplicateInboundEventDropCountBySubscription.removeAll()
+        inboundEventLogCount = 0
+        Self.pendingGiftWrapIDs.removeAll()
+
+        messageQueueLock.lock()
+        messageQueue.removeAll()
+        pendingSendDropCount = 0
+        messageQueueLock.unlock()
+
+        updateConnectionStatus()
+    }
+
+    private func markRelaySocketsClosed(resetState: Bool) {
+        let now = dependencies.now()
+        for index in relays.indices {
+            relays[index].isConnected = false
+            relays[index].nextReconnectTime = nil
+            if resetState {
+                relays[index].lastError = nil
+                relays[index].lastConnectedAt = nil
+                relays[index].lastDisconnectedAt = nil
+                relays[index].messagesSent = 0
+                relays[index].messagesReceived = 0
+                relays[index].reconnectAttempts = 0
+            } else {
+                relays[index].lastDisconnectedAt = now
+            }
+        }
+    }
     
     /// Ensure connections exist to the given relay URLs (idempotent).
     func ensureConnections(to relayUrls: [String]) {
@@ -1170,6 +1225,18 @@ final class NostrRelayManager: ObservableObject {
         return Set(map.keys)
     }
 
+    var debugMessageHandlerCount: Int {
+        messageHandlers.count
+    }
+
+    var debugSubscriptionRequestCount: Int {
+        subscriptionRequestState.count
+    }
+
+    var debugPendingEOSECallbackCount: Int {
+        pendingEOSECallbacks.count
+    }
+
     var debugDuplicateInboundEventDropCount: Int {
         duplicateInboundEventDropCount
     }

bitchat/Services/BLE/BLEAnnounceHandler.swift

@@ -168,8 +168,13 @@ final class BLEAnnounceHandler {
             env.updateTopology(peerID, neighbors)
         }
 
-        // Persist cryptographic identity and signing key for robust offline verification
-        env.persistIdentity(announcement)
+        // Persist cryptographic identity and signing key for robust offline
+        // verification — only for verified announces. Persisting unverified
+        // announces would let an attacker who replays a victim's noisePublicKey
+        // overwrite the victim's stored signing key/nickname (identity poisoning).
+        if verifiedAnnounce {
+            env.persistIdentity(announcement)
+        }
 
         let announceBackID = "announce-back-\(peerID)"
         let shouldSendBack = !env.dedupContains(announceBackID)

bitchat/Services/BLE/BLEPublicMessageHandler.swift

@@ -16,6 +16,8 @@ struct BLEPublicMessageHandlerEnvironment {
     let now: () -> Date
     /// Snapshot of known peers keyed by ID (registry read).
     let peersSnapshot: () -> [PeerID: BLEPeerInfo]
+    /// Verifies a packet's signature against a known signing public key.
+    let verifyPacketSignature: (_ packet: BitchatPacket, _ signingPublicKey: Data) -> Bool
     /// Resolves a display name from a verified packet signature for peers missing from the registry.
     let signedSenderDisplayName: (_ packet: BitchatPacket, _ peerID: PeerID) -> String?
     /// Tracks the broadcast message packet for gossip sync.
@@ -68,14 +70,39 @@ final class BLEPublicMessageHandler {
         // Snapshot peers to avoid concurrent mutation while iterating during nickname collision checks.
         let peersSnapshot = env.peersSnapshot()
 
+        // Public messages are always signed by their sender. `senderID` is
+        // attacker-controlled, so registry membership alone is NOT proof of
+        // identity — a peer in the registry as "verified" could be impersonated
+        // by anyone spoofing their senderID. Require a valid packet signature
+        // from the claimed sender (our own echoes are exempt; they are matched
+        // by self-broadcast tracking below).
+        //
+        // Verify against the signing key already in the (synchronously-updated)
+        // peer registry first: identity-cache persistence is asynchronous, so a
+        // message arriving right after a verified announce would otherwise be
+        // dropped because `signedSenderDisplayName` only searches the persisted
+        // cache. Fall back to that persisted-identity lookup for peers not (yet)
+        // in the registry.
+        let isSelf = peerID == env.localPeerID()
+        let registrySigningKey = peersSnapshot[peerID]?.signingPublicKey
+        let verifiedViaRegistry = !isSelf
+            && (registrySigningKey.map { env.verifyPacketSignature(packet, $0) } ?? false)
+        let signedDisplayName = (isSelf || verifiedViaRegistry) ? nil : env.signedSenderDisplayName(packet, peerID)
+        guard isSelf || verifiedViaRegistry || signedDisplayName != nil else {
+            SecureLogger.warning("🚫 Dropping public message with missing/invalid signature for claimed sender \(peerID.id.prefix(8))…", category: .security)
+            return
+        }
+
+        // Authenticity is established; prefer the registry's collision-resolved
+        // display name, then the signature-derived name.
         guard let senderNickname = BLEPeerSenderDisplayName.resolveKnownPeer(
             peerID: peerID,
             localPeerID: env.localPeerID(),
             localNickname: env.localNickname(),
             peers: peersSnapshot,
             allowConnectedUnverified: false
-        ) ?? env.signedSenderDisplayName(packet, peerID) else {
-            SecureLogger.warning("🚫 Dropping public message from unverified or unknown peer \(peerID.id.prefix(8))…", category: .security)
+        ) ?? signedDisplayName else {
+            SecureLogger.warning("🚫 Dropping public message from unknown peer \(peerID.id.prefix(8))…", category: .security)
             return
         }
 

bitchat/Services/BLE/BLEReceivePipeline.swift

@@ -12,7 +12,13 @@ struct BLEReceivedPacketContext: Equatable {
 struct BLEReceivePipeline {
     static func context(for packet: BitchatPacket, localPeerID: PeerID) -> BLEReceivedPacketContext {
         let senderID = PeerID(hexData: packet.senderID)
-        let messageID = "\(senderID)-\(packet.timestamp)-\(packet.type)"
+        // Include a payload digest so that distinct packets sharing the same
+        // sender/timestamp(ms)/type are not collapsed as duplicates. The
+        // post-handshake flush sends queued messages, delivery and read receipts
+        // back-to-back within a single millisecond; without the digest every
+        // packet after the first would be silently dropped.
+        let digestPrefix = packet.payload.sha256Hash().prefix(4).hexEncodedString()
+        let messageID = "\(senderID)-\(packet.timestamp)-\(packet.type)-\(digestPrefix)"
         let messageType = MessageType(rawValue: packet.type)
         let allowSelfSyncReplay = packet.ttl == 0 && senderID == localPeerID
         let shouldDeduplicate = messageType != .fragment && !allowSelfSyncReplay

bitchat/Services/BLE/BLEService.swift

@@ -135,6 +135,13 @@ final class BLEService: NSObject {
     
     private var maintenanceTimer: DispatchSourceTimer?  // Single timer for all maintenance tasks
     private var maintenanceCounter = 0  // Track maintenance cycles
+    /// Whether real CoreBluetooth managers were initialized. When false (unit
+    /// tests), periodic mesh background work is not started — the maintenance
+    /// timer and the gossip-sync timers only drain BLE writes/notifications,
+    /// re-announce, and sign/broadcast sync packets, all meaningless without
+    /// Bluetooth. Leaving them running in the test process is pure background
+    /// churn that aggravates flaky exit hangs.
+    private var meshBackgroundEnabled = false
 
     // MARK: - Connection budget & scheduling (central role)
     private var connectionScheduler = BLEConnectionScheduler<CBPeripheral>()
@@ -233,16 +240,10 @@ final class BLEService: NSObject {
             #endif
         }
         
-        // Single maintenance timer for all periodic tasks (dispatch-based for determinism)
-        let timer = DispatchSource.makeTimerSource(queue: bleQueue)
-        timer.schedule(deadline: .now() + TransportConfig.bleMaintenanceInterval,
-                       repeating: TransportConfig.bleMaintenanceInterval,
-                       leeway: .seconds(TransportConfig.bleMaintenanceLeewaySeconds))
-        timer.setEventHandler { [weak self] in
-            self?.performMaintenance()
-        }
-        timer.resume()
-        maintenanceTimer = timer
+        // Single maintenance timer for all periodic tasks (dispatch-based for
+        // determinism). Only run it when real Bluetooth managers exist.
+        meshBackgroundEnabled = initializeBluetoothManagers
+        startMaintenanceTimer()
 
         // Publish initial empty state
         requestPeerDataPublish()
@@ -272,7 +273,12 @@ final class BLEService: NSObject {
         
         let manager = GossipSyncManager(myPeerID: myPeerID, config: config, requestSyncManager: requestSyncManager)
         manager.delegate = self
-        manager.start()
+        // Only start the periodic sync timers when real Bluetooth exists. In unit
+        // tests there is no mesh to sync with, and the periodic sign/broadcast
+        // churn just keeps the process busy and aggravates flaky exit hangs.
+        if meshBackgroundEnabled {
+            manager.start()
+        }
         gossipSyncManager = manager
     }
 
@@ -435,7 +441,29 @@ final class BLEService: NSObject {
     
     // MARK: Lifecycle
     
+    /// Creates and starts the periodic maintenance timer if it is not already
+    /// running. Idempotent so it can be called from both `init` and
+    /// `startServices()` — the latter matters after a panic reset, where
+    /// `stopServices()` cancels and nils the timer.
+    private func startMaintenanceTimer() {
+        guard meshBackgroundEnabled, maintenanceTimer == nil else { return }
+        let timer = DispatchSource.makeTimerSource(queue: bleQueue)
+        timer.schedule(deadline: .now() + TransportConfig.bleMaintenanceInterval,
+                       repeating: TransportConfig.bleMaintenanceInterval,
+                       leeway: .seconds(TransportConfig.bleMaintenanceLeewaySeconds))
+        timer.setEventHandler { [weak self] in
+            self?.performMaintenance()
+        }
+        timer.resume()
+        maintenanceTimer = timer
+    }
+
     func startServices() {
+        // Restart the maintenance timer if a prior stopServices() cancelled it
+        // (e.g. the panic flow), otherwise periodic announces, peer reconciliation
+        // and cache cleanup would never resume until app restart.
+        startMaintenanceTimer()
+
         // Start BLE services if not already running
         if centralManager?.state == .poweredOn {
             centralManager?.scanForPeripherals(
@@ -1602,7 +1630,7 @@ private extension BLEService {
 #if DEBUG
 // Test-only helper to inject packets into the receive pipeline
 extension BLEService {
-    func _test_handlePacket(_ packet: BitchatPacket, fromPeerID: PeerID, preseedPeer: Bool = true) {
+    func _test_handlePacket(_ packet: BitchatPacket, fromPeerID: PeerID, preseedPeer: Bool = true, signingPublicKey: Data? = nil) {
         if preseedPeer {
             // Ensure the synthetic peer is known and marked verified for public-message tests
             let normalizedID = PeerID(hexData: packet.senderID)
@@ -1610,6 +1638,7 @@ extension BLEService {
                 if var existing = peerRegistry.info(for: normalizedID) {
                     existing.isConnected = true
                     existing.isVerifiedNickname = true
+                    if let signingPublicKey { existing.signingPublicKey = signingPublicKey }
                     existing.lastSeen = Date()
                     peerRegistry.upsert(existing)
                 } else {
@@ -1618,7 +1647,7 @@ extension BLEService {
                         nickname: "TestPeer_\(fromPeerID.id.prefix(4))",
                         isConnected: true,
                         noisePublicKey: packet.senderID,
-                        signingPublicKey: nil,
+                        signingPublicKey: signingPublicKey,
                         isVerifiedNickname: true,
                         lastSeen: Date()
                     ))
@@ -3110,6 +3139,9 @@ extension BLEService {
                 guard let self = self else { return [:] }
                 return self.collectionsQueue.sync { self.peerRegistry.snapshotByID }
             },
+            verifyPacketSignature: { [weak self] packet, signingPublicKey in
+                self?.noiseService.verifyPacketSignature(packet, publicKey: signingPublicKey) ?? false
+            },
             signedSenderDisplayName: { [weak self] packet, peerID in
                 self?.signedSenderDisplayName(for: packet, from: peerID)
             },

bitchat/Services/LocationStateManager.swift

@@ -594,6 +594,22 @@ final class LocationStateManager: NSObject, CLLocationManagerDelegate, Observabl
         }
     }
 
+    /// Removes all persisted location state and resets the in-memory view.
+    /// Used by the panic wipe — selected channel, teleport set and bookmarks
+    /// (which reveal where the user has been) must not survive on device.
+    func panicWipe() {
+        storage.removeObject(forKey: selectedChannelKey)
+        storage.removeObject(forKey: teleportedStoreKey)
+        storage.removeObject(forKey: bookmarksKey)
+        storage.removeObject(forKey: bookmarkNamesKey)
+        teleportedSet.removeAll()
+        bookmarkMembership.removeAll()
+        bookmarks = []
+        bookmarkNames = [:]
+        teleported = false
+        selectedChannel = .mesh
+    }
+
     private static func normalizeGeohash(_ s: String) -> String {
         let allowed = Set("0123456789bcdefghjkmnpqrstuvwxyz")
         return s

bitchat/Services/NetworkActivationService.swift

@@ -44,7 +44,11 @@ final class NetworkActivationService: ObservableObject {
     private let permissionProvider: () -> LocationChannelManager.PermissionState
     private let mutualFavoritesProvider: () -> Set<Data>
     private let torController: NetworkActivationTorControlling
-    private let relayController: NetworkActivationRelayControlling
+    // Resolved lazily: NostrRelayManager.init() reads NetworkActivationService.shared
+    // (via its live dependencies), so capturing NostrRelayManager.shared here would
+    // re-enter whichever singleton's dispatch_once started first and trap at launch.
+    private lazy var relayController: NetworkActivationRelayControlling = relayControllerProvider()
+    private let relayControllerProvider: () -> NetworkActivationRelayControlling
     private let proxyController: NetworkActivationProxyControlling
     private let notificationCenter: NotificationCenter
 
@@ -55,7 +59,7 @@ final class NetworkActivationService: ObservableObject {
         permissionProvider = { LocationChannelManager.shared.permissionState }
         mutualFavoritesProvider = { FavoritesPersistenceService.shared.mutualFavorites }
         torController = TorManager.shared
-        relayController = NostrRelayManager.shared
+        relayControllerProvider = { NostrRelayManager.shared }
         proxyController = TorURLSession.shared
         notificationCenter = .default
     }
@@ -77,7 +81,7 @@ final class NetworkActivationService: ObservableObject {
         self.permissionProvider = permissionProvider
         self.mutualFavoritesProvider = mutualFavoritesProvider
         self.torController = torController
-        self.relayController = relayController
+        self.relayControllerProvider = { relayController }
         self.proxyController = proxyController
         self.notificationCenter = notificationCenter
     }

bitchat/Sync/GossipSyncManager.swift

@@ -167,6 +167,16 @@ final class GossipSyncManager {
         return packet.timestamp >= cutoffMs
     }
 
+    private func normalizedSyncTypes(_ types: SyncTypeFlags?) -> SyncTypeFlags {
+        guard let types, !types.isEmpty else { return .publicMessages }
+        return types
+    }
+
+    private func isAtOrAfterMinimumTimestamp(_ packet: BitchatPacket, sinceTimestamp: UInt64?) -> Bool {
+        guard let sinceTimestamp else { return true }
+        return packet.timestamp >= sinceTimestamp
+    }
+
     private func _onPublicPacketSeen(_ packet: BitchatPacket) {
         guard let messageType = MessageType(rawValue: packet.type) else { return }
         let isBroadcastRecipient: Bool = {
@@ -218,8 +228,8 @@ final class GossipSyncManager {
         }
     }
 
-    private func sendRequestSync(for types: SyncTypeFlags) {
-        let payload = buildGcsPayload(for: types)
+    func sendRequestSync(for types: SyncTypeFlags? = nil, sinceTimestamp: UInt64? = nil) {
+        let payload = buildGcsPayload(for: types, sinceTimestamp: sinceTimestamp)
         let pkt = BitchatPacket(
             type: MessageType.requestSync.rawValue,
             senderID: Data(hexString: myPeerID.id) ?? Data(),
@@ -233,11 +243,11 @@ final class GossipSyncManager {
         delegate?.sendPacket(signed)
     }
 
-    private func sendRequestSync(to peerID: PeerID, types: SyncTypeFlags) {
+    func sendRequestSync(to peerID: PeerID, types: SyncTypeFlags? = nil, sinceTimestamp: UInt64? = nil) {
         // Register the request for RSR validation
         requestSyncManager.registerRequest(to: peerID)
         
-        let payload = buildGcsPayload(for: types)
+        let payload = buildGcsPayload(for: types, sinceTimestamp: sinceTimestamp)
         var recipient = Data()
         var temp = peerID.id
         while temp.count >= 2 && recipient.count < 8 {
@@ -265,7 +275,8 @@ final class GossipSyncManager {
     }
 
     private func _handleRequestSync(from peerID: PeerID, request: RequestSyncPacket) {
-        let requestedTypes = (request.types ?? .publicMessages)
+        let requestedTypes = normalizedSyncTypes(request.types)
+        let sinceTimestamp = request.sinceTimestamp
         // Decode GCS into sorted set and prepare membership checker
         let sorted = GCSFilter.decodeToSortedSet(p: request.p, m: request.m, data: request.data)
         func mightContain(_ id: Data) -> Bool {
@@ -276,7 +287,7 @@ final class GossipSyncManager {
         if requestedTypes.contains(.announce) {
             for (_, pair) in latestAnnouncementByPeer {
                 let (idHex, pkt) = pair
-                guard isPacketFresh(pkt) else { continue }
+                guard isPacketFresh(pkt), isAtOrAfterMinimumTimestamp(pkt, sinceTimestamp: sinceTimestamp) else { continue }
                 let idBytes = Data(hexString: idHex) ?? Data()
                 if !mightContain(idBytes) {
                     var toSend = pkt
@@ -290,6 +301,7 @@ final class GossipSyncManager {
         if requestedTypes.contains(.message) {
             let toSendMsgs = messages.allPackets(isFresh: isPacketFresh)
             for pkt in toSendMsgs {
+                guard isAtOrAfterMinimumTimestamp(pkt, sinceTimestamp: sinceTimestamp) else { continue }
                 let idBytes = PacketIdUtil.computeId(pkt)
                 if !mightContain(idBytes) {
                     var toSend = pkt
@@ -303,6 +315,7 @@ final class GossipSyncManager {
         if requestedTypes.contains(.fragment) {
             let frags = fragments.allPackets(isFresh: isPacketFresh)
             for pkt in frags {
+                guard isAtOrAfterMinimumTimestamp(pkt, sinceTimestamp: sinceTimestamp) else { continue }
                 let idBytes = PacketIdUtil.computeId(pkt)
                 if !mightContain(idBytes) {
                     var toSend = pkt
@@ -316,6 +329,7 @@ final class GossipSyncManager {
         if requestedTypes.contains(.fileTransfer) {
             let files = fileTransfers.allPackets(isFresh: isPacketFresh)
             for pkt in files {
+                guard isAtOrAfterMinimumTimestamp(pkt, sinceTimestamp: sinceTimestamp) else { continue }
                 let idBytes = PacketIdUtil.computeId(pkt)
                 if !mightContain(idBytes) {
                     var toSend = pkt
@@ -328,25 +342,33 @@ final class GossipSyncManager {
     }
 
     // Build REQUEST_SYNC payload using current candidates and GCS params
-    private func buildGcsPayload(for types: SyncTypeFlags) -> Data {
+    private func buildGcsPayload(for types: SyncTypeFlags?, sinceTimestamp: UInt64? = nil) -> Data {
+        let requestedTypes = normalizedSyncTypes(types)
+        let encodedTypes = types.flatMap { $0.isEmpty ? nil : $0 }
         var candidates: [BitchatPacket] = []
-        if types.contains(.announce) {
-            for (_, pair) in latestAnnouncementByPeer where isPacketFresh(pair.packet) {
+        if requestedTypes.contains(.announce) {
+            for (_, pair) in latestAnnouncementByPeer where isPacketFresh(pair.packet) && isAtOrAfterMinimumTimestamp(pair.packet, sinceTimestamp: sinceTimestamp) {
                 candidates.append(pair.packet)
             }
         }
-        if types.contains(.message) {
-            candidates.append(contentsOf: messages.allPackets(isFresh: isPacketFresh))
+        if requestedTypes.contains(.message) {
+            candidates.append(contentsOf: messages.allPackets(isFresh: isPacketFresh).filter {
+                isAtOrAfterMinimumTimestamp($0, sinceTimestamp: sinceTimestamp)
+            })
         }
-        if types.contains(.fragment) {
-            candidates.append(contentsOf: fragments.allPackets(isFresh: isPacketFresh))
+        if requestedTypes.contains(.fragment) {
+            candidates.append(contentsOf: fragments.allPackets(isFresh: isPacketFresh).filter {
+                isAtOrAfterMinimumTimestamp($0, sinceTimestamp: sinceTimestamp)
+            })
         }
-        if types.contains(.fileTransfer) {
-            candidates.append(contentsOf: fileTransfers.allPackets(isFresh: isPacketFresh))
+        if requestedTypes.contains(.fileTransfer) {
+            candidates.append(contentsOf: fileTransfers.allPackets(isFresh: isPacketFresh).filter {
+                isAtOrAfterMinimumTimestamp($0, sinceTimestamp: sinceTimestamp)
+            })
         }
         if candidates.isEmpty {
             let p = GCSFilter.deriveP(targetFpr: config.gcsTargetFpr)
-            let req = RequestSyncPacket(p: p, m: 1, data: Data(), types: types)
+            let req = RequestSyncPacket(p: p, m: 1, data: Data(), types: encodedTypes, sinceTimestamp: sinceTimestamp)
             return req.encode()
         }
 
@@ -356,21 +378,21 @@ final class GossipSyncManager {
         let p = GCSFilter.deriveP(targetFpr: config.gcsTargetFpr)
         let nMax = GCSFilter.estimateMaxElements(sizeBytes: config.gcsMaxBytes, p: p)
         let cap: Int
-        if types == .fragment {
+        if requestedTypes == .fragment {
             cap = max(1, config.fragmentCapacity)
-        } else if types == .fileTransfer {
+        } else if requestedTypes == .fileTransfer {
             cap = max(1, config.fileTransferCapacity)
         } else {
             cap = max(1, config.seenCapacity)
         }
         let takeN = min(candidates.count, min(nMax, cap))
         if takeN <= 0 {
-            let req = RequestSyncPacket(p: p, m: 1, data: Data(), types: types)
+            let req = RequestSyncPacket(p: p, m: 1, data: Data(), types: encodedTypes, sinceTimestamp: sinceTimestamp)
             return req.encode()
         }
         let ids: [Data] = candidates.prefix(takeN).map { PacketIdUtil.computeId($0) }
         let params = GCSFilter.buildFilter(ids: ids, maxBytes: config.gcsMaxBytes, targetFpr: config.gcsTargetFpr)
-        let req = RequestSyncPacket(p: params.p, m: params.m, data: params.data, types: types)
+        let req = RequestSyncPacket(p: params.p, m: params.m, data: params.data, types: encodedTypes, sinceTimestamp: sinceTimestamp)
         return req.encode()
     }
 
@@ -461,5 +483,11 @@ extension GossipSyncManager {
             messages.allPackets { _ in true }.filter { PeerID(hexData: $0.senderID) == peerID }.count
         }
     }
+
+    func _buildGcsPayloadSynchronously(for types: SyncTypeFlags? = nil, sinceTimestamp: UInt64? = nil) -> Data {
+        queue.sync {
+            buildGcsPayload(for: types, sinceTimestamp: sinceTimestamp)
+        }
+    }
 }
 #endif

bitchat/Sync/SyncTypeFlags.swift

@@ -1,8 +1,8 @@
 import BitFoundation
 import Foundation
 
-/// Bitfield describing which message types are covered by a REQUEST_SYNC round.
-/// Matches the Android mapping (bit index -> message type).
+/// Internal bitfield describing which message types are covered by a REQUEST_SYNC round.
+/// The wire TLV uses raw `MessageType` bytes, matching Android's wantedTypes format.
 struct SyncTypeFlags: OptionSet {
     let rawValue: UInt64
 
@@ -80,26 +80,37 @@ struct SyncTypeFlags: OptionSet {
     }
 
     func toData() -> Data? {
-        guard rawValue != 0 else { return nil }
-        var value = rawValue
-        var bytes: [UInt8] = []
-        while value > 0 && bytes.count < 8 {
-            bytes.append(UInt8(value & 0xFF))
-            value >>= 8
-        }
-        while let last = bytes.last, last == 0 {
-            bytes.removeLast()
-        }
-        guard !bytes.isEmpty, bytes.count <= 8 else { return nil }
+        let bytes = toMessageTypes().map(\.rawValue)
+        guard !bytes.isEmpty else { return nil }
         return Data(bytes)
     }
 
     static func decode(_ data: Data) -> SyncTypeFlags? {
+        guard !data.isEmpty else { return nil }
+
+        // Prior experimental iOS builds encoded announce+message as the
+        // bitfield byte 0x03. Android's upgraded wire format uses the same
+        // value for LEAVE, which this sync manager does not store, so prefer
+        // the legacy interpretation for the single-byte ambiguous case.
+        if data.count == 1 && data[0] == 0x03 {
+            return .publicMessages
+        }
+
+        let types = data.compactMap { MessageType(rawValue: $0) }
+        if !types.isEmpty {
+            return SyncTypeFlags(messageTypes: types)
+        }
+
+        return decodeLegacyBitfield(data)
+    }
+
+    private static func decodeLegacyBitfield(_ data: Data) -> SyncTypeFlags? {
         guard (1...8).contains(data.count) else { return nil }
         var raw: UInt64 = 0
         for (index, byte) in data.enumerated() {
             raw |= UInt64(byte) << UInt64(index * 8)
         }
-        return SyncTypeFlags(rawValue: raw)
+        let flags = SyncTypeFlags(rawValue: raw)
+        return flags.isEmpty ? nil : flags
     }
 }

bitchat/ViewModels/ChatViewModel.swift

@@ -1129,6 +1129,11 @@ final class ChatViewModel: ObservableObject, BitchatDelegate, TransportEventDele
         userDefaults.removeObject(forKey: "bitchat.noiseIdentityKey")
         userDefaults.removeObject(forKey: "bitchat.messageRetentionKey")
 
+        // Wipe persisted location state (selected channel, teleport set,
+        // bookmarks). For an activist-safety wipe, where the user has been is
+        // exactly the data an adversary inspecting the device wants.
+        LocationStateManager.shared.panicWipe()
+
         // Reset nickname to anonymous
         nickname = "anon\(Int.random(in: 1000...9999))"
         saveNickname()
@@ -1153,13 +1158,25 @@ final class ChatViewModel: ObservableObject, BitchatDelegate, TransportEventDele
         // Clear selected private chat
         selectedPrivateChatPeer = nil
 
+        // Clear live location/geohash session state. Persisted location state
+        // was wiped above, but the running view model can still be scoped to a
+        // geohash channel and hold subscriptions tied to the old Nostr identity.
+        activeChannel = .mesh
+        setGeoChatSubscriptionID(nil)
+        setGeoDmSubscriptionID(nil)
+        _ = clearGeoSamplingSubs()
+        cachedGeohashIdentity = nil
+        nostrKeyMapping.removeAll()
+
         // Clear read receipt tracking
         sentReadReceipts.removeAll()
         deduplicationService.clearAll()
 
         // IMPORTANT: Clear Nostr-related state
-        // Disconnect from Nostr relays and clear subscriptions
-        nostrRelayManager?.disconnect()
+        // Drop relay subscriptions, handlers, pending sends, and replay state.
+        // Geohash DM handlers can capture pre-wipe Nostr identities, so a plain
+        // disconnect is not enough here.
+        NostrRelayManager.shared.resetForPanicWipe()
         nostrRelayManager = nil
 
         // Clear Nostr identity associations
@@ -1175,15 +1192,25 @@ final class ChatViewModel: ObservableObject, BitchatDelegate, TransportEventDele
         // No need to force UserDefaults synchronization
 
         // Reinitialize Nostr with new identity
-        // This will generate new Nostr keys derived from new Noise keys
-        Task { @MainActor in
-            // Small delay to ensure cleanup completes
-            try? await Task.sleep(nanoseconds: TransportConfig.uiAsyncShortSleepNs) // 0.1 seconds
+        // This will generate new Nostr keys derived from new Noise keys.
+        // Skipped under tests: connecting the shared relay singleton starts
+        // real network/reconnect work that never completes and would keep the
+        // test process alive (the singleton, unlike a discardable instance, is
+        // never deallocated to cancel it).
+        if !TestEnvironment.isRunningTests {
+            Task { @MainActor in
+                // Small delay to ensure cleanup completes
+                try? await Task.sleep(nanoseconds: TransportConfig.uiAsyncShortSleepNs) // 0.1 seconds
 
-            // Reinitialize Nostr relay manager with new identity
-            nostrRelayManager = NostrRelayManager()
-            setupNostrMessageHandling()
-            nostrRelayManager?.connect()
+                // Reinitialize Nostr relay manager with new identity. Reuse the
+                // shared singleton — every other component (NostrTransport, geohash
+                // subscriptions, AppRuntime observers) is bound to `.shared`, so
+                // creating a fresh instance here would split relay state and leave
+                // sends running against a disconnected manager.
+                nostrRelayManager = NostrRelayManager.shared
+                setupNostrMessageHandling()
+                nostrRelayManager?.connect()
+            }
         }
 
         // Delete ALL media files (incoming and outgoing) in background

bitchatTests/BLEServiceCoreTests.swift

@@ -14,23 +14,29 @@ import BitFoundation
 struct BLEServiceCoreTests {
 
     @Test
-    func duplicatePacket_isDeduped() async {
+    func duplicatePacket_isDeduped() async throws {
         let ble = makeService()
         let delegate = PublicCaptureDelegate()
         ble.delegate = delegate
 
+        // Public messages must carry a valid signature from the claimed sender;
+        // sign the packet and preseed the sender's signing key so the receiver
+        // can verify it (production `sendMessage` signs public broadcasts too).
+        let signer = NoiseEncryptionService(keychain: MockKeychain())
         let sender = PeerID(str: "1122334455667788")
         let timestamp = UInt64(Date().timeIntervalSince1970 * 1000)
-        let packet = makePublicPacket(content: "Hello", sender: sender, timestamp: timestamp)
+        let unsigned = makePublicPacket(content: "Hello", sender: sender, timestamp: timestamp)
+        let packet = try #require(signer.signPacket(unsigned), "Failed to sign public message")
+        let signingKey = signer.getSigningPublicKeyData()
 
-        ble._test_handlePacket(packet, fromPeerID: sender)
+        ble._test_handlePacket(packet, fromPeerID: sender, signingPublicKey: signingKey)
         let receivedFirst = await TestHelpers.waitUntil(
             { delegate.publicMessagesSnapshot().count == 1 },
             timeout: TestConstants.defaultTimeout
         )
         #expect(receivedFirst)
 
-        ble._test_handlePacket(packet, fromPeerID: sender)
+        ble._test_handlePacket(packet, fromPeerID: sender, signingPublicKey: signingKey)
         let receivedDuplicate = await TestHelpers.waitUntil(
             { delegate.publicMessagesSnapshot().count > 1 },
             timeout: TestConstants.shortTimeout

bitchatTests/ChatViewModelTests.swift

@@ -1042,6 +1042,38 @@ struct ChatViewModelPanicTests {
         #expect(viewModel.unreadPrivateMessages.isEmpty)
         #expect(viewModel.selectedPrivateChatPeer == nil)
     }
+
+    @Test @MainActor
+    func panicClearAllData_resetsLiveGeohashAndNostrState() async throws {
+        let (viewModel, _) = makeTestableViewModel()
+        let geohash = "u4pruy"
+        let channel = GeohashChannel(level: .city, geohash: geohash)
+        let identity = try NostrIdentity.generate()
+        let pubkey = String(repeating: "ab", count: 32)
+        let peerID = PeerID(nostr: pubkey)
+
+        viewModel.activeChannel = .location(channel)
+        viewModel.setGeoChatSubscriptionID("geo-\(geohash)")
+        viewModel.setGeoDmSubscriptionID("geo-dm-\(geohash)")
+        viewModel.addGeoSamplingSub("geo-sample-\(geohash)", forGeohash: geohash)
+        viewModel.cachedGeohashIdentity = (geohash, identity)
+        viewModel.registerNostrKeyMapping(pubkey, for: peerID)
+        viewModel.currentGeohash = geohash
+        viewModel.geoNicknames = [pubkey: "alice"]
+        viewModel.teleportedGeo = [pubkey]
+
+        viewModel.panicClearAllData()
+
+        #expect(viewModel.activeChannel == .mesh)
+        #expect(viewModel.geoSubscriptionID == nil)
+        #expect(viewModel.geoDmSubscriptionID == nil)
+        #expect(viewModel.geoSamplingSubs.isEmpty)
+        #expect(viewModel.cachedGeohashIdentity == nil)
+        #expect(viewModel.nostrKeyMapping.isEmpty)
+        #expect(viewModel.currentGeohash == nil)
+        #expect(viewModel.geoNicknames.isEmpty)
+        #expect(viewModel.teleportedGeo.isEmpty)
+    }
 }
 
 // MARK: - Service Lifecycle Tests

bitchatTests/Fragmentation/FragmentationTests.swift

@@ -21,9 +21,16 @@ struct FragmentationTests {
         let capture = CaptureDelegate()
         ble.delegate = capture
 
-        // Construct a big packet (3KB) from a remote sender (not our own ID)
+        // Construct a big SIGNED public packet (3KB) from a remote sender. Public
+        // messages must carry a valid signature, so the reassembled packet is
+        // signed and the sender's signing key is preseeded into the registry.
+        let signer = NoiseEncryptionService(keychain: MockKeychain())
+        let signingKey = signer.getSigningPublicKeyData()
         let remoteShortID = PeerID(str: "1122334455667788")
-        let original = makeLargePublicPacket(senderShortHex: remoteShortID, size: 3_000)
+        let original = try #require(
+            signer.signPacket(makeLargePublicPacket(senderShortHex: remoteShortID, size: 3_000)),
+            "Failed to sign public packet"
+        )
 
         // Use a small fragment size to ensure multiple pieces
         let fragments = fragmentPacket(original, fragmentSize: 400)
@@ -36,7 +43,7 @@ struct FragmentationTests {
             if i > 0 {
                 try await Task.sleep(for: .milliseconds(5))
             }
-            ble._test_handlePacket(fragment, fromPeerID: remoteShortID)
+            ble._test_handlePacket(fragment, fromPeerID: remoteShortID, signingPublicKey: signingKey)
         }
 
         // Wait for delegate callback with proper timeout
@@ -52,8 +59,13 @@ struct FragmentationTests {
         let capture = CaptureDelegate()
         ble.delegate = capture
 
+        let signer = NoiseEncryptionService(keychain: MockKeychain())
+        let signingKey = signer.getSigningPublicKeyData()
         let remoteShortID = PeerID(str: "A1B2C3D4E5F60708")
-        let original = makeLargePublicPacket(senderShortHex: remoteShortID, size: 2048)
+        let original = try #require(
+            signer.signPacket(makeLargePublicPacket(senderShortHex: remoteShortID, size: 2048)),
+            "Failed to sign public packet"
+        )
         var frags = fragmentPacket(original, fragmentSize: 300)
 
         // Duplicate one fragment
@@ -66,7 +78,7 @@ struct FragmentationTests {
             if i > 0 {
                 try await Task.sleep(for: .milliseconds(5))
             }
-            ble._test_handlePacket(fragment, fromPeerID: remoteShortID)
+            ble._test_handlePacket(fragment, fromPeerID: remoteShortID, signingPublicKey: signingKey)
         }
 
         // Wait for delegate callback with proper timeout

bitchatTests/GossipSyncManagerTests.swift

@@ -279,6 +279,107 @@ struct GossipSyncManagerTests {
         #expect(sentPackets.count == 1)
         #expect(sentPackets[0].type == MessageType.fragment.rawValue)
     }
+
+    @Test func handleRequestSyncHonorsSinceTimestamp() async throws {
+        var config = GossipSyncManager.Config()
+        config.seenCapacity = 5
+        config.fragmentCapacity = 0
+        config.fileTransferCapacity = 0
+        config.messageSyncIntervalSeconds = 0
+        config.fragmentSyncIntervalSeconds = 0
+        config.fileTransferSyncIntervalSeconds = 0
+
+        let requestSyncManager = RequestSyncManager()
+        let manager = GossipSyncManager(myPeerID: myPeerID, config: config, requestSyncManager: requestSyncManager)
+        let delegate = RecordingDelegate()
+        manager.delegate = delegate
+
+        let sender = try #require(Data(hexString: "aabbccddeeff0011"))
+        let threshold = UInt64(Date().timeIntervalSince1970 * 1000)
+
+        let oldMessage = BitchatPacket(
+            type: MessageType.message.rawValue,
+            senderID: sender,
+            recipientID: nil,
+            timestamp: threshold - 1,
+            payload: Data([0x10]),
+            signature: nil,
+            ttl: 1
+        )
+
+        let freshMessage = BitchatPacket(
+            type: MessageType.message.rawValue,
+            senderID: sender,
+            recipientID: nil,
+            timestamp: threshold,
+            payload: Data([0x20]),
+            signature: nil,
+            ttl: 1
+        )
+
+        manager.onPublicPacketSeen(oldMessage)
+        manager.onPublicPacketSeen(freshMessage)
+
+        let peer = PeerID(str: "FFFFFFFFFFFFFFFF")
+        let request = RequestSyncPacket(p: 4, m: 1, data: Data(), types: .message, sinceTimestamp: threshold)
+        manager.handleRequestSync(from: peer, request: request)
+
+        try await TestHelpers.waitFor({ delegate.packets.count == 1 }, timeout: TestConstants.shortTimeout)
+        let sentPacket = try #require(delegate.packets.first)
+        #expect(sentPacket.payload == Data([0x20]))
+    }
+
+    @Test func buildGcsPayloadHonorsSinceTimestamp() throws {
+        var config = GossipSyncManager.Config()
+        config.seenCapacity = 5
+        config.fragmentCapacity = 0
+        config.fileTransferCapacity = 0
+        config.messageSyncIntervalSeconds = 0
+        config.fragmentSyncIntervalSeconds = 0
+        config.fileTransferSyncIntervalSeconds = 0
+        config.gcsTargetFpr = 0.000001
+
+        let requestSyncManager = RequestSyncManager()
+        let manager = GossipSyncManager(myPeerID: myPeerID, config: config, requestSyncManager: requestSyncManager)
+
+        let sender = try #require(Data(hexString: "1122334455667788"))
+        let threshold = UInt64(Date().timeIntervalSince1970 * 1000)
+
+        let oldMessage = BitchatPacket(
+            type: MessageType.message.rawValue,
+            senderID: sender,
+            recipientID: nil,
+            timestamp: threshold - 1,
+            payload: Data([0xA0]),
+            signature: nil,
+            ttl: 1
+        )
+
+        let freshMessage = BitchatPacket(
+            type: MessageType.message.rawValue,
+            senderID: sender,
+            recipientID: nil,
+            timestamp: threshold + 1,
+            payload: Data([0xB0]),
+            signature: nil,
+            ttl: 1
+        )
+
+        manager.onPublicPacketSeen(oldMessage)
+        manager.onPublicPacketSeen(freshMessage)
+        manager._performMaintenanceSynchronously()
+
+        let payload = manager._buildGcsPayloadSynchronously(for: .message, sinceTimestamp: threshold)
+        let request = try #require(RequestSyncPacket.decode(from: payload))
+        let sorted = GCSFilter.decodeToSortedSet(p: request.p, m: request.m, data: request.data)
+        let oldBucket = GCSFilter.bucket(for: PacketIdUtil.computeId(oldMessage), modulus: request.m)
+        let freshBucket = GCSFilter.bucket(for: PacketIdUtil.computeId(freshMessage), modulus: request.m)
+
+        #expect(request.types?.contains(.message) == true)
+        #expect(request.sinceTimestamp == threshold)
+        #expect(GCSFilter.contains(sortedValues: sorted, candidate: freshBucket))
+        #expect(GCSFilter.contains(sortedValues: sorted, candidate: oldBucket) == false)
+    }
 }
 
 private final class RecordingDelegate: GossipSyncManager.Delegate {

bitchatTests/NostrProtocolTests.swift

@@ -120,6 +120,42 @@ struct NostrProtocolTests {
         }
     }
 
+    @Test func decryptRejectsInvalidSealSignature() throws {
+        let sender = try NostrIdentity.generate()
+        let recipient = try NostrIdentity.generate()
+        let giftWrap = try NostrProtocol.createPrivateMessageWithInvalidSealSignatureForTesting(
+            content: "forged signature",
+            recipientPubkey: recipient.publicKeyHex,
+            senderIdentity: sender
+        )
+
+        expectInvalidEvent {
+            _ = try NostrProtocol.decryptPrivateMessage(
+                giftWrap: giftWrap,
+                recipientIdentity: recipient
+            )
+        }
+    }
+
+    @Test func decryptRejectsSealRumorPubkeyMismatch() throws {
+        let claimedSender = try NostrIdentity.generate()
+        let sealSigner = try NostrIdentity.generate()
+        let recipient = try NostrIdentity.generate()
+        let giftWrap = try NostrProtocol.createPrivateMessageWithMismatchedSealRumorPubkeyForTesting(
+            content: "spoofed sender",
+            recipientPubkey: recipient.publicKeyHex,
+            rumorIdentity: claimedSender,
+            sealSignerIdentity: sealSigner
+        )
+
+        expectInvalidEvent {
+            _ = try NostrProtocol.decryptPrivateMessage(
+                giftWrap: giftWrap,
+                recipientIdentity: recipient
+            )
+        }
+    }
+
     func testAckRoundTripNIP44V2_Delivered() throws {
         // Identities
         let sender = try NostrIdentity.generate()
@@ -260,4 +296,15 @@ struct NostrProtocolTests {
         if rem > 0 { str.append(String(repeating: "=", count: 4 - rem)) }
         return Data(base64Encoded: str)
     }
+
+    private func expectInvalidEvent(_ operation: () throws -> Void) {
+        do {
+            try operation()
+            Issue.record("Expected NostrError.invalidEvent")
+        } catch NostrError.invalidEvent {
+            return
+        } catch {
+            Issue.record("Expected NostrError.invalidEvent, got \(error)")
+        }
+    }
 }

bitchatTests/Services/BLEAnnounceHandlerTests.swift

@@ -173,7 +173,10 @@ struct BLEAnnounceHandlerTests {
         #expect(recorder.uiEventDeliveries.count == 1)
         #expect(recorder.uiEventDeliveries.first?.notifyPeerConnected == false)
         #expect(recorder.uiEventDeliveries.first?.scheduleInitialSync == false)
-        #expect(recorder.persistedIdentities.count == 1)
+        // Identity persistence MUST NOT occur for unverified announces:
+        // persisting would let an attacker who replays a victim's noisePublicKey
+        // overwrite the victim's stored signing key/nickname (identity poisoning).
+        #expect(recorder.persistedIdentities.isEmpty)
         #expect(recorder.trackedPackets.count == 1)
         #expect(recorder.announceBacks == 1)
     }

bitchatTests/Services/BLEPublicMessageHandlerTests.swift

@@ -8,10 +8,12 @@ struct BLEPublicMessageHandlerTests {
         var localNickname = "Me"
         var peers: [PeerID: BLEPeerInfo] = [:]
         var signedName: String?
+        var verifyPacketSignatureResult = false
         var linkState: (hasPeripheral: Bool, hasCentral: Bool) = (false, false)
         var selfBroadcastMessageID: String?
 
         var peersSnapshotReads = 0
+        var verifyPacketSignatureQueries: [PeerID] = []
         var signedNameQueries: [PeerID] = []
         var trackedPackets: [BitchatPacket] = []
         var selfBroadcastTakes: [BitchatPacket] = []
@@ -35,6 +37,10 @@ struct BLEPublicMessageHandlerTests {
                 recorder.peersSnapshotReads += 1
                 return recorder.peers
             },
+            verifyPacketSignature: { packet, _ in
+                recorder.verifyPacketSignatureQueries.append(PeerID(hexData: packet.senderID))
+                return recorder.verifyPacketSignatureResult
+            },
             signedSenderDisplayName: { _, peerID in
                 recorder.signedNameQueries.append(peerID)
                 return recorder.signedName
@@ -59,13 +65,17 @@ struct BLEPublicMessageHandlerTests {
         let now = Date(timeIntervalSince1970: 1_000)
         let recorder = Recorder()
         recorder.peers = [remotePeerID: makePeerInfo(remotePeerID, nickname: "Alice", isVerified: true)]
+        // A valid packet signature is required even for a registry-verified peer:
+        // senderID is spoofable, so registry membership alone is not authentication.
+        recorder.signedName = "SignedAlice"
         let handler = makeHandler(recorder: recorder, now: now)
         let packet = makeMessagePacket(sender: remotePeerID, content: "hello mesh", timestamp: timestamp(now))
 
         handler.handle(packet, from: remotePeerID)
 
         #expect(recorder.peersSnapshotReads == 1)
-        #expect(recorder.signedNameQueries.isEmpty)
+        // Signature is verified, then the registry's collision-resolved name is preferred.
+        #expect(recorder.signedNameQueries == [remotePeerID])
         #expect(recorder.trackedPackets.count == 1)
         #expect(recorder.selfBroadcastTakes.isEmpty)
         #expect(recorder.deliveries.count == 1)
@@ -133,6 +143,63 @@ struct BLEPublicMessageHandlerTests {
         #expect(recorder.deliveries.isEmpty)
     }
 
+    @Test
+    func registryVerifiedPeerDeliveredBeforeIdentityCachePersists() {
+        // A freshly verified announce updates the peer registry synchronously,
+        // but identity-cache persistence is async. A message arriving in that
+        // window has a valid signature and a registry signing key, yet the
+        // persisted-identity lookup (signedName) would still return nil. It must
+        // be verified against the registry key and delivered, not dropped.
+        let now = Date(timeIntervalSince1970: 1_000)
+        let recorder = Recorder()
+        recorder.peers = [remotePeerID: makePeerInfo(
+            remotePeerID,
+            nickname: "Alice",
+            isVerified: true,
+            signingPublicKey: Data(repeating: 0xAB, count: 32)
+        )]
+        recorder.verifyPacketSignatureResult = true
+        recorder.signedName = nil
+        let handler = makeHandler(recorder: recorder, now: now)
+        let packet = makeMessagePacket(sender: remotePeerID, content: "first msg", timestamp: timestamp(now))
+
+        handler.handle(packet, from: remotePeerID)
+
+        #expect(recorder.verifyPacketSignatureQueries == [remotePeerID])
+        // Verified via the registry key, so no fallback to the persisted lookup.
+        #expect(recorder.signedNameQueries.isEmpty)
+        #expect(recorder.trackedPackets.count == 1)
+        #expect(recorder.deliveries.count == 1)
+        #expect(recorder.deliveries.first?.nickname == "Alice")
+        #expect(recorder.deliveries.first?.content == "first msg")
+    }
+
+    @Test
+    func registryPeerWithInvalidSignatureFallsBackAndDrops() {
+        // Spoofed senderID: the peer is in the registry with a signing key, but
+        // the packet signature does not verify against it. The handler must fall
+        // back to the persisted lookup and, finding nothing, drop the message.
+        let now = Date(timeIntervalSince1970: 1_000)
+        let recorder = Recorder()
+        recorder.peers = [remotePeerID: makePeerInfo(
+            remotePeerID,
+            nickname: "Alice",
+            isVerified: true,
+            signingPublicKey: Data(repeating: 0xAB, count: 32)
+        )]
+        recorder.verifyPacketSignatureResult = false
+        recorder.signedName = nil
+        let handler = makeHandler(recorder: recorder, now: now)
+        let packet = makeMessagePacket(sender: remotePeerID, content: "spoofed", timestamp: timestamp(now))
+
+        handler.handle(packet, from: remotePeerID)
+
+        #expect(recorder.verifyPacketSignatureQueries == [remotePeerID])
+        #expect(recorder.signedNameQueries == [remotePeerID])
+        #expect(recorder.trackedPackets.isEmpty)
+        #expect(recorder.deliveries.isEmpty)
+    }
+
     @Test
     func signedSenderFallbackDeliversWithSignedName() {
         let now = Date(timeIntervalSince1970: 1_000)
@@ -154,6 +221,7 @@ struct BLEPublicMessageHandlerTests {
         let now = Date(timeIntervalSince1970: 1_000)
         let recorder = Recorder()
         recorder.peers = [remotePeerID: makePeerInfo(remotePeerID, nickname: "Alice", isVerified: true)]
+        recorder.signedName = "SignedAlice"
         let handler = makeHandler(recorder: recorder, now: now)
         let packet = makeMessagePacket(sender: remotePeerID, payload: Data([0xFF, 0xFE, 0xFD]), timestamp: timestamp(now))
 
@@ -187,6 +255,7 @@ struct BLEPublicMessageHandlerTests {
         let now = Date(timeIntervalSince1970: 1_000)
         let recorder = Recorder()
         recorder.peers = [remotePeerID: makePeerInfo(remotePeerID, nickname: "Alice", isVerified: true)]
+        recorder.signedName = "SignedAlice"
         let handler = makeHandler(recorder: recorder, now: now)
         let packet = makeMessagePacket(
             sender: remotePeerID,
@@ -213,14 +282,15 @@ struct BLEPublicMessageHandlerTests {
         _ peerID: PeerID,
         nickname: String,
         isVerified: Bool,
-        isConnected: Bool = true
+        isConnected: Bool = true,
+        signingPublicKey: Data? = nil
     ) -> BLEPeerInfo {
         BLEPeerInfo(
             peerID: peerID,
             nickname: nickname,
             isConnected: isConnected,
             noisePublicKey: nil,
-            signingPublicKey: nil,
+            signingPublicKey: signingPublicKey,
             isVerifiedNickname: isVerified,
             lastSeen: Date(timeIntervalSince1970: 999)
         )

bitchatTests/Services/BLEReceivePipelineTests.swift

@@ -14,7 +14,10 @@ struct BLEReceivePipelineTests {
         let context = BLEReceivePipeline.context(for: packet, localPeerID: local)
 
         #expect(context.senderID == sender)
-        #expect(context.messageID == "\(sender)-1234-\(MessageType.message.rawValue)")
+        // The message ID includes a payload digest so distinct packets sharing a
+        // sender/timestamp(ms)/type are not collapsed as duplicates.
+        let digest = packet.payload.sha256Hash().prefix(4).hexEncodedString()
+        #expect(context.messageID == "\(sender)-1234-\(MessageType.message.rawValue)-\(digest)")
         #expect(context.messageType == .message)
         #expect(context.shouldDeduplicate)
         #expect(context.logsHandlingDetails)

bitchatTests/Services/NostrRelayManagerTests.swift

@@ -1328,6 +1328,68 @@ final class NostrRelayManagerTests: XCTestCase {
         XCTAssertEqual(context.manager.debugPendingSubscriptionCount(for: relayURL), 0)
     }
 
+    func test_resetForPanicWipe_dropsSessionRelayStateWithoutFiringCallbacks() async throws {
+        let relayURL = "wss://panic-reset.example"
+        let context = makeContext(permission: .denied, userTorEnabled: true, torEnforced: true, torIsReady: false)
+        let event = try makeSignedEvent(content: "queued before panic")
+        var handledEvents = 0
+        var eoseCount = 0
+
+        context.manager.subscribe(
+            filter: makeFilter(),
+            id: "panic-sub",
+            relayUrls: [relayURL],
+            handler: { _ in handledEvents += 1 },
+            onEOSE: { eoseCount += 1 }
+        )
+        context.manager.sendEvent(event, to: [relayURL])
+
+        XCTAssertEqual(context.manager.debugMessageHandlerCount, 1)
+        XCTAssertEqual(context.manager.debugSubscriptionRequestCount, 1)
+        XCTAssertEqual(context.manager.debugPendingSubscriptionCount(for: relayURL), 1)
+        XCTAssertEqual(context.manager.debugPendingEOSECallbackCount, 1)
+        XCTAssertEqual(context.manager.debugPendingMessageQueueCount, 1)
+        XCTAssertTrue(context.sessionFactory.requestedURLs.isEmpty)
+
+        context.manager.resetForPanicWipe()
+
+        XCTAssertEqual(context.manager.debugMessageHandlerCount, 0)
+        XCTAssertEqual(context.manager.debugSubscriptionRequestCount, 0)
+        XCTAssertEqual(context.manager.debugPendingSubscriptionCount(for: relayURL), 0)
+        XCTAssertEqual(context.manager.debugPendingEOSECallbackCount, 0)
+        XCTAssertEqual(context.manager.debugPendingMessageQueueCount, 0)
+        XCTAssertEqual(handledEvents, 0)
+        XCTAssertEqual(eoseCount, 0)
+
+        // Stale Tor wait and fallback callbacks from the pre-wipe generation
+        // must not resurrect connections or settle callbacks after reset.
+        context.torWaiter.resolve(true)
+        context.scheduler.runNext()
+        try? await Task.sleep(nanoseconds: 20_000_000)
+
+        XCTAssertTrue(context.sessionFactory.requestedURLs.isEmpty)
+        XCTAssertEqual(eoseCount, 0)
+    }
+
+    func test_resetForPanicWipe_marksConnectedRelaysDisconnected() async {
+        let relayURL = "wss://panic-connected.example"
+        let context = makeContext(permission: .denied)
+
+        context.manager.ensureConnections(to: [relayURL])
+        let connected = await waitUntil {
+            context.manager.isConnected &&
+                context.manager.relays.first(where: { $0.url == relayURL })?.isConnected == true
+        }
+        XCTAssertTrue(connected)
+
+        context.manager.resetForPanicWipe()
+
+        XCTAssertFalse(context.manager.isConnected)
+        XCTAssertEqual(context.manager.relays.first(where: { $0.url == relayURL })?.isConnected, false)
+        XCTAssertEqual(context.manager.relays.first(where: { $0.url == relayURL })?.reconnectAttempts, 0)
+        XCTAssertNil(context.manager.relays.first(where: { $0.url == relayURL })?.lastError)
+    }
+
     func test_reconnectBackoff_appliesJitterWithinConfiguredBounds() async {
         let relayURL = "wss://jitter-bounds.example"
         // Pin the jitter source to the extremes and the midpoint of [0, 1).

bitchatTests/Sync/RequestSyncPacketTests.swift

@@ -0,0 +1,118 @@
+//
+// RequestSyncPacketTests.swift
+// bitchat
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import Foundation
+import Testing
+import BitFoundation
+@testable import bitchat
+
+struct RequestSyncPacketTests {
+    @Test func baseFieldsRoundTrip() throws {
+        let original = RequestSyncPacket(
+            p: 7,
+            m: 12_800,
+            data: Data([1, 2, 3, 4, 5])
+        )
+
+        let decoded = try #require(RequestSyncPacket.decode(from: original.encode()))
+
+        #expect(decoded.p == 7)
+        #expect(decoded.m == 12_800)
+        #expect(decoded.data == Data([1, 2, 3, 4, 5]))
+        #expect(decoded.types == nil)
+        #expect(decoded.sinceTimestamp == nil)
+    }
+
+    @Test func upgradedFieldsRoundTripAsAndroidWantedTypes() throws {
+        let original = RequestSyncPacket(
+            p: 8,
+            m: 25_600,
+            data: Data([10, 20, 30]),
+            types: .publicMessages,
+            sinceTimestamp: 1_700_000_000_000
+        )
+
+        let encoded = original.encode()
+        let wantedTypes = try #require(tlvValue(type: 0x04, in: encoded))
+        let decoded = try #require(RequestSyncPacket.decode(from: encoded))
+
+        #expect(wantedTypes == Data([MessageType.announce.rawValue, MessageType.message.rawValue]))
+        #expect(decoded.p == 8)
+        #expect(decoded.m == 25_600)
+        #expect(decoded.data == Data([10, 20, 30]))
+        #expect(decoded.types?.contains(.announce) == true)
+        #expect(decoded.types?.contains(.message) == true)
+        #expect(decoded.sinceTimestamp == 1_700_000_000_000)
+    }
+
+    @Test func decodesLegacyPayloadWithoutUpgradeFields() throws {
+        let payload = Data([
+            0x01, 0x00, 0x01, 0x07,
+            0x02, 0x00, 0x04, 0x00, 0x00, 0x32, 0x00,
+            0x03, 0x00, 0x03, 0x01, 0x02, 0x03
+        ])
+
+        let decoded = try #require(RequestSyncPacket.decode(from: payload))
+
+        #expect(decoded.p == 7)
+        #expect(decoded.m == 12_800)
+        #expect(decoded.data == Data([1, 2, 3]))
+        #expect(decoded.types == nil)
+        #expect(decoded.sinceTimestamp == nil)
+    }
+
+    @Test func decodesAndroidWantedTypesAndMinTimestamp() throws {
+        let payload = Data([
+            0x01, 0x00, 0x01, 0x08,
+            0x02, 0x00, 0x04, 0x00, 0x00, 0x64, 0x00,
+            0x03, 0x00, 0x02, 0xAA, 0xBB,
+            0x04, 0x00, 0x02, MessageType.announce.rawValue, MessageType.message.rawValue,
+            0x05, 0x00, 0x08, 0x00, 0x00, 0x01, 0x8B, 0xCF, 0xE5, 0x68, 0x00
+        ])
+
+        let decoded = try #require(RequestSyncPacket.decode(from: payload))
+
+        #expect(decoded.p == 8)
+        #expect(decoded.m == 25_600)
+        #expect(decoded.data == Data([0xAA, 0xBB]))
+        #expect(decoded.types?.contains(.announce) == true)
+        #expect(decoded.types?.contains(.message) == true)
+        #expect(decoded.sinceTimestamp == 1_700_000_000_000)
+    }
+
+    @Test func decodesLegacyIOSPublicMessageBitfield() throws {
+        let payload = Data([
+            0x01, 0x00, 0x01, 0x08,
+            0x02, 0x00, 0x04, 0x00, 0x00, 0x64, 0x00,
+            0x03, 0x00, 0x00,
+            0x04, 0x00, 0x01, 0x03
+        ])
+
+        let decoded = try #require(RequestSyncPacket.decode(from: payload))
+
+        #expect(decoded.types?.contains(.announce) == true)
+        #expect(decoded.types?.contains(.message) == true)
+    }
+
+    private func tlvValue(type: UInt8, in data: Data) -> Data? {
+        var offset = 0
+        while offset + 3 <= data.count {
+            let currentType = data[offset]
+            offset += 1
+            let length = (Int(data[offset]) << 8) | Int(data[offset + 1])
+            offset += 2
+            guard offset + length <= data.count else { return nil }
+            let value = data.subdata(in: offset..<(offset + length))
+            offset += length
+            if currentType == type {
+                return value
+            }
+        }
+        return nil
+    }
+}

relays/online_relays_gps.csv

@@ -1,441 +1,416 @@
 Relay URL,Latitude,Longitude
-nostr.bitcoiner.social:443,47.6743,-117.112
-relay-dev.satlantis.io:443,40.8302,-74.1299
-relay.lightning.pub:443,39.0438,-77.4874
-ribo.us.nostria.app:443,43.6532,-79.3832
-relay.notoshi.win,13.3622,100.983
-openrelay.ziomc.com,50.0755,14.4378
-relay.agentry.com:443,42.8864,-78.8784
-nostr-relay.xbytez.io,50.6924,3.20113
-relay.gulugulu.moe,43.6532,-79.3832
-nostr.thebiglake.org:443,32.71,-96.6745
-relay.fountain.fm,43.6532,-79.3832
-freelay.sovbit.host,60.1699,24.9384
-nostr.girino.org:443,43.6532,-79.3832
-relay.openresist.com,43.6532,-79.3832
-nas01xanthosnet.synology.me:7778,47.1285,8.74735
-relay.ohstr.com:443,43.6532,-79.3832
-nostr-pub.wellorder.net,45.5201,-122.99
-relay.nostrdice.com,-33.8688,151.209
-bbw-nostr.xyz,41.5284,-87.4237
-cs-relay.nostrdev.com:443,50.4754,12.3683
-top.testrelay.top,43.6532,-79.3832
-relay.trotters.cc,43.6532,-79.3832
-blossom.gnostr.cloud,43.6532,-79.3832
-ribo.eu.nostria.app:443,43.6532,-79.3832
-public.crostr.com,43.6532,-79.3832
-relay.nostar.org,43.6532,-79.3832
-strfry.bonsai.com:443,39.0438,-77.4874
-nostr.carroarmato0.be,50.914,3.21378
-relay.endfiat.money,59.3327,18.0656
-nostr.overmind.lol:443,43.6532,-79.3832
-nostr.myshosholoza.co.za:443,52.3913,4.66545
-relay.wellorder.net,45.5201,-122.99
-nostr.tagomago.me,42.3601,-71.0589
-relay.internationalright-wing.org,-22.5022,-48.7114
-relay.fckstate.net,59.3293,18.0686
-nostr.azzamo.net,52.2633,21.0283
-relay.0xchat.com,43.6532,-79.3832
-relayone.geektank.ai,39.1008,-94.5811
-relay.homeinhk.xyz,35.694,139.754
-nostr.nodesmap.com,59.3327,18.0656
-relay.islandbitcoin.com:443,12.8498,77.6545
-relay.mrmave.work,43.6532,-79.3832
-relay.arx-ccn.com,50.4754,12.3683
-fanfares.nostr1.com:443,40.7057,-74.0136
-wot.shaving.kiwi,43.6532,-79.3832
-relay.nearhood.co.uk,51.5072,-0.127586
-relay.fundstr.me,42.3601,-71.0589
-syb.lol:443,43.6532,-79.3832
-dm-test-strfry-discovery.samt.st:443,43.6532,-79.3832
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