Improve background BLE stability and nearby alerts (#864)

* Harden background BLE restoration and notifications

* Guard BLE restoration paths to iOS

---------

Co-authored-by: jack <jackjackbits@users.noreply.github.com>

.github/workflows/fetch_georelays.yml

@@ -7,6 +7,7 @@ on:
 
 permissions:
   contents: write
+  pull-requests: write
 
 jobs:
   update-relay-data:
@@ -17,24 +18,54 @@ jobs:
         uses: actions/checkout@v4
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-      
+          fetch-depth: 0
+
       - name: Fetch GeoRelays
         run: |
-          wget https://raw.githubusercontent.com/permissionlesstech/georelays/refs/heads/main/nostr_relays.csv
+          wget -q https://raw.githubusercontent.com/permissionlesstech/georelays/refs/heads/main/nostr_relays.csv
           mv nostr_relays.csv ./relays/online_relays_gps.csv
 
-      - name: Check for changes
+      - name: Configure git
-        id: git-check
         run: |
-          git diff --exit-code || echo "changes=true" >> $GITHUB_OUTPUT
+          git config user.email "action@github.com"
-    
+          git config user.name "GitHub Action"
-      - name: Commit and push changes
+
-        if: steps.git-check.outputs.changes == 'true'
+      - name: Create update branch if changes
+        id: create_branch
         run: |
-          git config --local user.email "action@github.com"
+          # exit early if no changes
-          git config --local user.name "GitHub Action"
+          if git diff --quiet --relays/online_relays_gps.csv; then
+            echo "changed=false" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
+          # branch name with timestamp
+          BRANCH="update-georelays-$(date -u +%Y%m%dT%H%M%SZ)"
+          git checkout -b "$BRANCH"
+
           git add relays/online_relays_gps.csv
-          git commit -m "Automated update of relay data - $(date -u)"
+          git commit -m "Automated update of relay data - $(date -u --rfc-3339=seconds)"
-          git push
+          echo "changed=true" >> $GITHUB_OUTPUT
-        env:
+          echo "branch=$BRANCH" >> $GITHUB_OUTPUT
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push branch
+        if: steps.create_branch.outputs.changed == 'true'
+        run: |
+          git push --set-upstream origin "${{ steps.create_branch.outputs.branch }}"
+
+      - name: Create pull request
+        if: steps.create_branch.outputs.changed == 'true'
+        uses: peter-evans/create-pull-request@v5
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: Automated update of relay data
+          branch: ${{ steps.create_branch.outputs.branch }}
+          base: main
+          title: Automated update of relay data
+          body: |
+            This PR was created automatically by the scheduled workflow. It updates relays/online_relays_gps.csv from the GeoRelays source.
+          labels: automated, georelays
+
+      - name: No changes
+        if: steps.create_branch.outputs.changed != 'true'
+        run: echo "No changes to relays/online_relays_gps.csv"

bitchat.xcodeproj/xcshareddata/xcschemes/bitchat (iOS).xcscheme

@@ -98,8 +98,8 @@
       </BuildableProductRunnable>
       <EnvironmentVariables>
          <EnvironmentVariable
-            key = "-DBITCHAT_DEV_ALLOW_CLEARNET"
+            key = "BITCHAT_LOG_LEVEL"
-            value = ""
+            value = "debug"
             isEnabled = "YES">
          </EnvironmentVariable>
       </EnvironmentVariables>

bitchat/BitchatApp.swift

@@ -246,7 +246,7 @@ final class NotificationDelegate: NSObject, UNUserNotificationCenterDelegate {
             // Get peer ID from userInfo
             if let peerID = userInfo["peerID"] as? String {
                 // Don't show notification if the private chat is already open
-                if chatViewModel?.selectedPrivateChatPeer == peerID {
+                if chatViewModel?.selectedPrivateChatPeer == PeerID(str: peerID) {
                     completionHandler([])
                     return
                 }

bitchat/Features/media/ImageUtils.swift

@@ -13,10 +13,10 @@ enum ImageUtilsError: Error {
 }
 
 enum ImageUtils {
-    private static let compressionQuality: CGFloat = 0.85
+    private static let compressionQuality: CGFloat = 0.82
-    private static let targetImageBytes: Int = 60_000
+    private static let targetImageBytes: Int = 45_000
 
-    static func processImage(at url: URL, maxDimension: CGFloat = 512) throws -> URL {
+    static func processImage(at url: URL, maxDimension: CGFloat = 448) throws -> URL {
         // Security H1: Check file size BEFORE reading into memory
         let attrs = try FileManager.default.attributesOfItem(atPath: url.path)
         guard let fileSize = attrs[.size] as? Int else {
@@ -38,7 +38,7 @@ enum ImageUtils {
     }
 
     #if os(iOS)
-    static func processImage(_ image: UIImage, maxDimension: CGFloat = 512) throws -> URL {
+    static func processImage(_ image: UIImage, maxDimension: CGFloat = 448) throws -> URL {
         return try autoreleasepool {
             // Scale the image first
             let scaled = scaledImage(image, maxDimension: maxDimension)
@@ -106,7 +106,7 @@ enum ImageUtils {
         return data as Data
     }
     #else
-    static func processImage(_ image: NSImage, maxDimension: CGFloat = 512) throws -> URL {
+    static func processImage(_ image: NSImage, maxDimension: CGFloat = 448) throws -> URL {
         return try autoreleasepool {
             let scaled = scaledImage(image, maxDimension: maxDimension)
             guard let inputCG = scaled.cgImage(forProposedRect: nil, context: nil, hints: nil) else {

bitchat/Features/voice/VoiceRecorder.swift

@@ -14,6 +14,7 @@ final class VoiceRecorder: NSObject, AVAudioRecorderDelegate {
 
     private let queue = DispatchQueue(label: "com.bitchat.voice-recorder")
     private let paddingInterval: TimeInterval = 0.5
+    private let maxRecordingDuration: TimeInterval = 120
 
     private var recorder: AVAudioRecorder?
     private var currentURL: URL?
@@ -75,14 +76,14 @@ final class VoiceRecorder: NSObject, AVAudioRecorderDelegate {
                 AVFormatIDKey: kAudioFormatMPEG4AAC,
                 AVSampleRateKey: 16_000,
                 AVNumberOfChannelsKey: 1,
-                AVEncoderBitRateKey: 20_000
+                AVEncoderBitRateKey: 16_000
             ]
 
             let audioRecorder = try AVAudioRecorder(url: outputURL, settings: settings)
             audioRecorder.delegate = self
             audioRecorder.isMeteringEnabled = true
             audioRecorder.prepareToRecord()
-            audioRecorder.record()
+            audioRecorder.record(forDuration: maxRecordingDuration)
 
             recorder = audioRecorder
             currentURL = outputURL

bitchat/Localizable.xcstrings

@@ -6268,10 +6268,6 @@
         }
       }
     },
-    "Choose an image" : {
-      "comment" : "A label displayed above a button that allows the user to choose an image to send.",
-      "isCommentAutoGenerated" : true
-    },
     "close" : {
       "comment" : "Button to dismiss fullscreen media viewer",
       "localizations" : {
@@ -35705,7 +35701,545 @@
           }
         }
       }
+    },
+    "Voice notes are only available in mesh chats." : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "ar" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "الملاحظات الصوتية متاحة فقط في محادثات الميش."
+          }
+        },
+        "bn" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "ভয়েস নোট শুধু মেশ চ্যাটে উপলব্ধ।"
+          }
+        },
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Sprachnachrichten sind nur im Mesh-Chat verfügbar."
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Voice notes are only available in mesh chats."
+          }
+        },
+        "es" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Las notas de voz solo están disponibles en los chats de mesh."
+          }
+        },
+        "fil" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Ang mga voice note ay available lamang sa mga mesh chat."
+          }
+        },
+        "fr" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Les notes vocales sont uniquement disponibles dans les discussions mesh."
+          }
+        },
+        "he" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "הערות קוליות זמינות רק בצ׳אט של mesh."
+          }
+        },
+        "hi" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "वॉइस नोट्स केवल मेश चैट में ही उपलब्ध हैं।"
+          }
+        },
+        "id" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Catatan suara hanya tersedia di obrolan mesh."
+          }
+        },
+        "it" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Le note vocali sono disponibili solo nelle chat mesh."
+          }
+        },
+        "ja" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "ボイスメモはメッシュチャットでのみ利用できます。"
+          }
+        },
+        "ko" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "음성 메모는 메쉬 채팅에서만 사용할 수 있습니다."
+          }
+        },
+        "ms" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Nota suara hanya tersedia dalam sembang mesh."
+          }
+        },
+        "ne" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "भ्वाइस नोटहरू केवल मेष च्याटमा मात्र उपलब्ध छन्।"
+          }
+        },
+        "nl" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Spraaknotities zijn alleen beschikbaar in mesh-chats."
+          }
+        },
+        "pl" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Notatki głosowe są dostępne tylko na czatach mesh."
+          }
+        },
+        "pt" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "As notas de voz só estão disponíveis nos chats mesh."
+          }
+        },
+        "pt-BR" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "As mensagens de voz só estão disponíveis nos chats mesh."
+          }
+        },
+        "ru" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Голосовые сообщения доступны только в mesh-чатах."
+          }
+        },
+        "sv" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Röstanteckningar är bara tillgängliga i mesh-chattar."
+          }
+        },
+        "ta" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "குரல் குறிப்புகள் மெஷ் உரையாடல்களில் மட்டுமே கிடைக்கும்."
+          }
+        },
+        "th" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "บันทึกเสียงใช้งานได้เฉพาะในแชต mesh เท่านั้น"
+          }
+        },
+        "tr" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Sesli notlar yalnızca mesh sohbetlerinde kullanılabilir."
+          }
+        },
+        "uk" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Голосові нотатки доступні лише в mesh-чатах."
+          }
+        },
+        "ur" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "وائس نوٹس صرف میش چیٹس میں دستیاب ہیں۔"
+          }
+        },
+        "vi" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Ghi chú giọng nói chỉ khả dụng trong các cuộc trò chuyện mesh."
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "语音消息仅可在 mesh 聊天中使用。"
+          }
+        },
+        "zh-Hant" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "語音訊息僅能在 mesh 聊天中使用。"
+          }
+        }
+      }
+    },
+    "Images are only available in mesh chats." : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "ar" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "الصور متاحة فقط في محادثات الميش."
+          }
+        },
+        "bn" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "ছবি শুধু মেশ চ্যাটে উপলব্ধ।"
+          }
+        },
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Bilder sind nur im Mesh-Chat verfügbar."
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Images are only available in mesh chats."
+          }
+        },
+        "es" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Las imágenes solo están disponibles en los chats de mesh."
+          }
+        },
+        "fil" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Ang mga larawan ay available lamang sa mga mesh chat."
+          }
+        },
+        "fr" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Les images sont uniquement disponibles dans les discussions mesh."
+          }
+        },
+        "he" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "תמונות זמינות רק בצ׳אט של mesh."
+          }
+        },
+        "hi" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "चित्र केवल मेश चैट में ही उपलब्ध हैं।"
+          }
+        },
+        "id" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Gambar hanya tersedia di obrolan mesh."
+          }
+        },
+        "it" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Le immagini sono disponibili solo nelle chat mesh."
+          }
+        },
+        "ja" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "画像はメッシュチャットでのみ利用できます。"
+          }
+        },
+        "ko" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "이미지는 메쉬 채팅에서만 사용할 수 있습니다."
+          }
+        },
+        "ms" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Imej hanya tersedia dalam sembang mesh."
+          }
+        },
+        "ne" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "तस्बिरहरू केवल मेष च्याटमा मात्र उपलब्ध छन्।"
+          }
+        },
+        "nl" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Afbeeldingen zijn alleen beschikbaar in mesh-chats."
+          }
+        },
+        "pl" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Obrazy są dostępne tylko na czatach mesh."
+          }
+        },
+        "pt" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "As imagens só estão disponíveis nos chats mesh."
+          }
+        },
+        "pt-BR" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "As imagens só estão disponíveis nos chats mesh."
+          }
+        },
+        "ru" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Изображения доступны только в mesh-чатах."
+          }
+        },
+        "sv" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Bilder är bara tillgängliga i mesh-chattar."
+          }
+        },
+        "ta" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "படங்கள் மெஷ் உரையாடல்களில் மட்டுமே கிடைக்கும்."
+          }
+        },
+        "th" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "รูปภาพใช้งานได้เฉพาะในแชต mesh เท่านั้น"
+          }
+        },
+        "tr" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Görseller yalnızca mesh sohbetlerinde kullanılabilir."
+          }
+        },
+        "uk" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Зображення доступні лише в mesh-чатах."
+          }
+        },
+        "ur" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "تصاویر صرف میش چیٹس میں دستیاب ہیں۔"
+          }
+        },
+        "vi" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Hình ảnh chỉ khả dụng trong các cuộc trò chuyện mesh."
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "图片仅可在 mesh 聊天中使用。"
+          }
+        },
+        "zh-Hant" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "圖片僅能在 mesh 聊天中使用。"
+          }
+        }
+      }
+    },
+    "Choose an image" : {
+      "comment" : "A label displayed above a button that allows the user to choose an image to send.",
+      "extractionState" : "manual",
+      "localizations" : {
+        "ar" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "اختر صورة"
+          }
+        },
+        "bn" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "একটি ছবি নির্বাচন করুন"
+          }
+        },
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Bild auswählen"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Choose an image"
+          }
+        },
+        "es" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Elige una imagen"
+          }
+        },
+        "fil" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Pumili ng larawan"
+          }
+        },
+        "fr" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Choisir une image"
+          }
+        },
+        "he" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "בחר תמונה"
+          }
+        },
+        "hi" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "एक चित्र चुनें"
+          }
+        },
+        "id" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Pilih gambar"
+          }
+        },
+        "it" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Scegli un’immagine"
+          }
+        },
+        "ja" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "画像を選択"
+          }
+        },
+        "ko" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "이미지를 선택하세요"
+          }
+        },
+        "ms" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Pilih imej"
+          }
+        },
+        "ne" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "एउटा तस्वीर चयन गर्नुहोस्"
+          }
+        },
+        "nl" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Kies een afbeelding"
+          }
+        },
+        "pl" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Wybierz obraz"
+          }
+        },
+        "pt" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Escolher uma imagem"
+          }
+        },
+        "pt-BR" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Escolha uma imagem"
+          }
+        },
+        "ru" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Выберите изображение"
+          }
+        },
+        "sv" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Välj en bild"
+          }
+        },
+        "ta" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "ஒரு படத்தைத் தேர்ந்தெடுக்கவும்"
+          }
+        },
+        "th" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "เลือกภาพ"
+          }
+        },
+        "tr" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Bir görüntü seç"
+          }
+        },
+        "uk" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Виберіть зображення"
+          }
+        },
+        "ur" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "ایک تصویر منتخب کریں"
+          }
+        },
+        "vi" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Chọn một hình ảnh"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "选择图像"
+          }
+        },
+        "zh-Hant" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "選擇圖像"
+          }
+        }
+      }
     }
   },
   "version" : "1.1"
-}
+}

bitchat/Models/PeerID.swift

@@ -35,7 +35,7 @@ struct PeerID: Equatable, Hashable {
     // Private so the callers have to go through a convenience init
     private init(prefix: Prefix, bare: any StringProtocol) {
         self.prefix = prefix
-        self.bare = String(bare)
+        self.bare = String(bare).lowercased()
     }
 }
 
@@ -76,6 +76,12 @@ extension PeerID {
     init(hexData: Data) {
         self.init(str: hexData.hexEncodedString())
     }
+    
+    /// Convenience init to "hide" hex-encoding implementation detail
+    init?(hexData: Data?) {
+        guard let hexData else { return nil }
+        self.init(hexData: hexData)
+    }
 }
 
 // MARK: - Noise Public Key Helpers
@@ -191,9 +197,7 @@ extension PeerID: Comparable {
     }
 }
 
-// MARK: - String Interop Helpers
+// MARK: - CustomStringConvertible
-
-// MARK: CustomStringConvertible
 
 extension PeerID: CustomStringConvertible {
     /// So it returns the actual `id` like before even inside another String
@@ -201,17 +205,3 @@ extension PeerID: CustomStringConvertible {
         id
     }
 }
-
-// MARK: Custom Equatable w/ String & Optionality
-
-// PeerID <> String
-extension Optional where Wrapped == PeerID {
-    static func ==(lhs: Optional<Wrapped>, rhs: Optional<String>) -> Bool   { lhs?.id == rhs }
-    static func !=(lhs: Optional<Wrapped>, rhs: Optional<String>) -> Bool   { lhs?.id != rhs }
-}
-
-// String <> PeerID
-extension Optional where Wrapped == String {
-    static func ==(lhs: Optional<Wrapped>, rhs: Optional<PeerID>) -> Bool   { lhs == rhs?.id }
-    static func !=(lhs: Optional<Wrapped>, rhs: Optional<PeerID>) -> Bool   { lhs != rhs?.id }
-}

bitchat/Models/ReadReceipt.swift

@@ -11,11 +11,11 @@ import Foundation
 struct ReadReceipt: Codable {
     let originalMessageID: String
     let receiptID: String
-    var readerID: String  // Who read it
+    var readerID: PeerID  // Who read it
     let readerNickname: String
     let timestamp: Date
     
-    init(originalMessageID: String, readerID: String, readerNickname: String) {
+    init(originalMessageID: String, readerID: PeerID, readerNickname: String) {
         self.originalMessageID = originalMessageID
         self.receiptID = UUID().uuidString
         self.readerID = readerID
@@ -24,7 +24,7 @@ struct ReadReceipt: Codable {
     }
     
     // For binary decoding
-    private init(originalMessageID: String, receiptID: String, readerID: String, readerNickname: String, timestamp: Date) {
+    private init(originalMessageID: String, receiptID: String, readerID: PeerID, readerNickname: String, timestamp: Date) {
         self.originalMessageID = originalMessageID
         self.receiptID = receiptID
         self.readerID = readerID
@@ -48,7 +48,7 @@ struct ReadReceipt: Codable {
         data.appendUUID(receiptID)
         // ReaderID as 8-byte hex string
         var readerData = Data()
-        var tempID = readerID
+        var tempID = readerID.id
         while tempID.count >= 2 && readerData.count < 8 {
             let hexByte = String(tempID.prefix(2))
             if let byte = UInt8(hexByte, radix: 16) {
@@ -78,8 +78,8 @@ struct ReadReceipt: Codable {
               let receiptID = dataCopy.readUUID(at: &offset) else { return nil }
         
         guard let readerIDData = dataCopy.readFixedBytes(at: &offset, count: 8) else { return nil }
-        let readerID = readerIDData.hexEncodedString()
+        let readerID = PeerID(hexData: readerIDData)
-        guard PeerID(str: readerID).isValid else { return nil }
+        guard readerID.isValid else { return nil }
         
         guard let timestamp = dataCopy.readDate(at: &offset),
               InputValidator.validateTimestamp(timestamp),

bitchat/Models/RequestSyncPacket.swift

@@ -8,6 +8,14 @@ struct RequestSyncPacket {
     let p: Int
     let m: UInt32
     let data: Data
+    let types: SyncTypeFlags?
+
+    init(p: Int, m: UInt32, data: Data, types: SyncTypeFlags? = nil) {
+        self.p = p
+        self.m = m
+        self.data = data
+        self.types = types
+    }
 
     func encode() -> Data {
         var out = Data()
@@ -25,6 +33,9 @@ struct RequestSyncPacket {
         putTLV(0x02, withUnsafeBytes(of: &mBE) { Data($0) })
         // data
         putTLV(0x03, data)
+        if let typesData = types?.toData() {
+            putTLV(0x04, typesData)
+        }
         return out
     }
 
@@ -33,6 +44,7 @@ struct RequestSyncPacket {
         var p: Int? = nil
         var m: UInt32? = nil
         var payload: Data? = nil
+        var types: SyncTypeFlags? = nil
 
         while off + 3 <= data.count {
             let t = Int(data[off]); off += 1
@@ -52,12 +64,16 @@ struct RequestSyncPacket {
             case 0x03:
                 if v.count > maxAcceptBytes { return nil }
                 payload = v
+            case 0x04:
+                if let decoded = SyncTypeFlags.decode(v) {
+                    types = decoded
+                }
             default:
                 break // forward compatible; ignore unknown TLVs
             }
         }
 
         guard let pp = p, let mm = m, let dd = payload, pp >= 1, mm > 0 else { return nil }
-        return RequestSyncPacket(p: pp, m: mm, data: dd)
+        return RequestSyncPacket(p: pp, m: mm, data: dd, types: types)
     }
 }

bitchat/Nostr/GeoRelayDirectory.swift

@@ -1,6 +1,11 @@
 import BitLogger
 import Foundation
 import Tor
+#if os(iOS)
+import UIKit
+#elseif os(macOS)
+import AppKit
+#endif
 
 /// Directory of online Nostr relays with approximate GPS locations, used for geohash routing.
 @MainActor
@@ -12,19 +17,32 @@ final class GeoRelayDirectory {
     }
 
     static let shared = GeoRelayDirectory()
+
     private(set) var entries: [Entry] = []
     private let cacheFileName = "georelays_cache.csv"
     private let lastFetchKey = "georelay.lastFetchAt"
     private let remoteURL = URL(string: "https://raw.githubusercontent.com/permissionlesstech/georelays/refs/heads/main/nostr_relays.csv")!
-    private let fetchInterval: TimeInterval = TransportConfig.geoRelayFetchIntervalSeconds // 24h
+    private let fetchInterval: TimeInterval = TransportConfig.geoRelayFetchIntervalSeconds
+
+    private var refreshTimer: Timer?
+    private var retryTask: Task<Void, Never>?
+    private var retryAttempt: Int = 0
+    private var isFetching: Bool = false
+    private var observers: [NSObjectProtocol] = []
 
     private init() {
-        // Load cached or bundled data synchronously
+        entries = loadLocalEntries()
-        self.entries = self.loadLocalEntries()
+        registerObservers()
-        // Fire-and-forget remote refresh if stale
+        startRefreshTimer()
         prefetchIfNeeded()
     }
 
+    deinit {
+        observers.forEach { NotificationCenter.default.removeObserver($0) }
+        refreshTimer?.invalidate()
+        retryTask?.cancel()
+    }
+
     /// Returns up to `count` relay URLs (wss://) closest to the geohash center.
     func closestRelays(toGeohash geohash: String, count: Int = 5) -> [String] {
         let center = Geohash.decodeCenter(geohash)
@@ -62,42 +80,119 @@ final class GeoRelayDirectory {
     }
 
     // MARK: - Remote Fetch
-    func prefetchIfNeeded() {
+    func prefetchIfNeeded(force: Bool = false) {
+        guard !isFetching else { return }
+
         let now = Date()
         let last = UserDefaults.standard.object(forKey: lastFetchKey) as? Date ?? .distantPast
-        guard now.timeIntervalSince(last) >= fetchInterval else { return }
+
+        if !force {
+            guard now.timeIntervalSince(last) >= fetchInterval else { return }
+        } else if last != .distantPast,
+                  now.timeIntervalSince(last) < TransportConfig.geoRelayRetryInitialSeconds {
+            // Skip forced fetches if we just refreshed moments ago.
+            return
+        }
+
+        cancelRetry()
         fetchRemote()
     }
 
     private func fetchRemote() {
-        let req = URLRequest(url: remoteURL, cachePolicy: .reloadIgnoringLocalCacheData, timeoutInterval: 15)
+        guard !isFetching else { return }
-        // Ensure Tor readiness before fetching (fail-closed by default)
+        isFetching = true
-        Task.detached {
+
+        let request = URLRequest(
+            url: remoteURL,
+            cachePolicy: .reloadIgnoringLocalCacheData,
+            timeoutInterval: 15
+        )
+
+        Task.detached { [weak self] in
+            guard let self else { return }
+
             let ready = await TorManager.shared.awaitReady()
             if !ready {
-                SecureLogger.warning("GeoRelayDirectory: Tor not ready; skipping remote fetch (fail-closed)", category: .session)
+                await self.handleFetchFailure(.torNotReady)
                 return
             }
-            let task = TorURLSession.shared.session.dataTask(with: req) { [weak self] data, _, error in
+
-                guard let self = self else { return }
+            do {
-                if let data = data, error == nil, let text = String(data: data, encoding: .utf8) {
+                let (data, _) = try await TorURLSession.shared.session.data(for: request)
-                    let parsed = GeoRelayDirectory.parseCSV(text)
+                guard let text = String(data: data, encoding: .utf8) else {
-                    if !parsed.isEmpty {
+                    await self.handleFetchFailure(.invalidData)
-                        Task { @MainActor in
+                    return
-                            self.entries = parsed
-                            self.persistCache(text)
-                            UserDefaults.standard.set(Date(), forKey: self.lastFetchKey)
-                            SecureLogger.info("GeoRelayDirectory: refreshed \(parsed.count) relays from remote", category: .session)
-                        }
-                        return
-                    }
                 }
-                SecureLogger.warning("GeoRelayDirectory: remote fetch failed; keeping local entries", category: .session)
+
+                let parsed = GeoRelayDirectory.parseCSV(text)
+                guard !parsed.isEmpty else {
+                    await self.handleFetchFailure(.invalidData)
+                    return
+                }
+
+                await self.handleFetchSuccess(entries: parsed, csv: text)
+            } catch {
+                await self.handleFetchFailure(.network(error))
             }
-            task.resume()
         }
     }
 
+    private enum FetchFailure {
+        case torNotReady
+        case invalidData
+        case network(Error)
+    }
+
+    @MainActor
+    private func handleFetchSuccess(entries parsed: [Entry], csv: String) {
+        entries = parsed
+        persistCache(csv)
+        UserDefaults.standard.set(Date(), forKey: lastFetchKey)
+        SecureLogger.info("GeoRelayDirectory: refreshed \(parsed.count) relays from remote", category: .session)
+        isFetching = false
+        retryAttempt = 0
+        cancelRetry()
+    }
+
+    @MainActor
+    private func handleFetchFailure(_ reason: FetchFailure) {
+        switch reason {
+        case .torNotReady:
+            SecureLogger.warning("GeoRelayDirectory: Tor not ready; scheduling retry", category: .session)
+        case .invalidData:
+            SecureLogger.warning("GeoRelayDirectory: remote fetch returned invalid data; scheduling retry", category: .session)
+        case .network(let error):
+            SecureLogger.warning("GeoRelayDirectory: remote fetch failed with error: \(error.localizedDescription)", category: .session)
+        }
+        isFetching = false
+        scheduleRetry()
+    }
+
+    @MainActor
+    private func scheduleRetry() {
+        retryAttempt = min(retryAttempt + 1, 10)
+        let base = TransportConfig.geoRelayRetryInitialSeconds
+        let maxDelay = TransportConfig.geoRelayRetryMaxSeconds
+        let multiplier = pow(2.0, Double(max(retryAttempt - 1, 0)))
+        let calculated = base * multiplier
+        let delay = min(maxDelay, max(base, calculated))
+
+        cancelRetry()
+        retryTask = Task { [weak self] in
+            let nanoseconds = UInt64(delay * 1_000_000_000)
+            try? await Task.sleep(nanoseconds: nanoseconds)
+            await MainActor.run {
+                self?.prefetchIfNeeded(force: true)
+            }
+        }
+    }
+
+    @MainActor
+    private func cancelRetry() {
+        retryTask?.cancel()
+        retryTask = nil
+    }
+
     private func persistCache(_ text: String) {
         guard let url = cacheURL() else { return }
         do {
@@ -110,30 +205,35 @@ final class GeoRelayDirectory {
     // MARK: - Loading
     private func loadLocalEntries() -> [Entry] {
         // Prefer cached file if present
-        if let cache = self.cacheURL(),
+        if let cache = cacheURL(),
            let data = try? Data(contentsOf: cache),
            let text = String(data: data, encoding: .utf8) {
             let arr = Self.parseCSV(text)
             if !arr.isEmpty { return arr }
         }
+
         // Try bundled resource(s)
         let bundleCandidates = [
             Bundle.main.url(forResource: "nostr_relays", withExtension: "csv"),
             Bundle.main.url(forResource: "online_relays_gps", withExtension: "csv"),
             Bundle.main.url(forResource: "online_relays_gps", withExtension: "csv", subdirectory: "relays")
         ].compactMap { $0 }
+
         for url in bundleCandidates {
-            if let data = try? Data(contentsOf: url), let text = String(data: data, encoding: .utf8) {
+            if let data = try? Data(contentsOf: url),
+               let text = String(data: data, encoding: .utf8) {
                 let arr = Self.parseCSV(text)
                 if !arr.isEmpty { return arr }
             }
         }
+
         // Try filesystem path (development/test)
         if let cwd = FileManager.default.currentDirectoryPath as String?,
            let data = try? Data(contentsOf: URL(fileURLWithPath: cwd).appendingPathComponent("relays/online_relays_gps.csv")),
            let text = String(data: data, encoding: .utf8) {
             return Self.parseCSV(text)
         }
+
         SecureLogger.warning("GeoRelayDirectory: no local CSV found; entries empty", category: .session)
         return []
     }
@@ -141,7 +241,6 @@ final class GeoRelayDirectory {
     nonisolated static func parseCSV(_ text: String) -> [Entry] {
         var result: Set<Entry> = []
         let lines = text.split(whereSeparator: { $0.isNewline })
-        // Skip header if present
         for (idx, raw) in lines.enumerated() {
             let line = raw.trimmingCharacters(in: .whitespacesAndNewlines)
             if line.isEmpty { continue }
@@ -162,11 +261,76 @@ final class GeoRelayDirectory {
 
     private func cacheURL() -> URL? {
         do {
-            let base = try FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
+            let base = try FileManager.default.url(
+                for: .applicationSupportDirectory,
+                in: .userDomainMask,
+                appropriateFor: nil,
+                create: true
+            )
             let dir = base.appendingPathComponent("bitchat", isDirectory: true)
             try? FileManager.default.createDirectory(at: dir, withIntermediateDirectories: true)
             return dir.appendingPathComponent(cacheFileName)
-        } catch { return nil }
+        } catch {
+            return nil
+        }
+    }
+
+    // MARK: - Observers & Timers
+    private func registerObservers() {
+        let center = NotificationCenter.default
+
+        let torReady = center.addObserver(
+            forName: .TorDidBecomeReady,
+            object: nil,
+            queue: .main
+        ) { [weak self] _ in
+            guard let self else { return }
+            Task { @MainActor in
+                self.prefetchIfNeeded(force: true)
+            }
+        }
+        observers.append(torReady)
+
+#if os(iOS)
+        let didBecomeActive = center.addObserver(
+            forName: UIApplication.didBecomeActiveNotification,
+            object: nil,
+            queue: .main
+        ) { [weak self] _ in
+            guard let self else { return }
+            Task { @MainActor in
+                self.prefetchIfNeeded()
+            }
+        }
+        observers.append(didBecomeActive)
+#elseif os(macOS)
+        let didBecomeActive = center.addObserver(
+            forName: NSApplication.didBecomeActiveNotification,
+            object: nil,
+            queue: .main
+        ) { [weak self] _ in
+            guard let self else { return }
+            Task { @MainActor in
+                self.prefetchIfNeeded()
+            }
+        }
+        observers.append(didBecomeActive)
+#endif
+    }
+
+    private func startRefreshTimer() {
+        refreshTimer?.invalidate()
+        let interval = TransportConfig.geoRelayRefreshCheckIntervalSeconds
+        guard interval > 0 else { return }
+
+        let timer = Timer.scheduledTimer(withTimeInterval: interval, repeats: true) { [weak self] _ in
+            guard let self else { return }
+            Task { @MainActor in
+                self.prefetchIfNeeded()
+            }
+        }
+        refreshTimer = timer
+        RunLoop.main.add(timer, forMode: .common)
     }
 }
 

bitchat/Nostr/NostrEmbeddedBitChat.swift

@@ -4,7 +4,7 @@ import Foundation
 
 struct NostrEmbeddedBitChat {
     /// Build a `bitchat1:` base64url-encoded BitChat packet carrying a private message for Nostr DMs.
-    static func encodePMForNostr(content: String, messageID: String, recipientPeerID: String, senderPeerID: String) -> String? {
+    static func encodePMForNostr(content: String, messageID: String, recipientPeerID: PeerID, senderPeerID: PeerID) -> String? {
         // TLV-encode the private message
         let pm = PrivateMessagePacket(messageID: messageID, content: content)
         guard let tlv = pm.encode() else { return nil }
@@ -14,12 +14,12 @@ struct NostrEmbeddedBitChat {
         payload.append(tlv)
 
         // Determine 8-byte recipient ID to embed
-        let recipientIDHex: String = normalizeRecipientPeerID(recipientPeerID)
+        let recipientID = normalizeRecipientPeerID(recipientPeerID)
 
         let packet = BitchatPacket(
             type: MessageType.noiseEncrypted.rawValue,
-            senderID: Data(hexString: senderPeerID) ?? Data(),
+            senderID: Data(hexString: senderPeerID.id) ?? Data(),
-            recipientID: Data(hexString: recipientIDHex),
+            recipientID: Data(hexString: recipientID.id),
             timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
             payload: payload,
             signature: nil,
@@ -31,18 +31,18 @@ struct NostrEmbeddedBitChat {
     }
 
     /// Build a `bitchat1:` base64url-encoded BitChat packet carrying a delivery/read ack for Nostr DMs.
-    static func encodeAckForNostr(type: NoisePayloadType, messageID: String, recipientPeerID: String, senderPeerID: String) -> String? {
+    static func encodeAckForNostr(type: NoisePayloadType, messageID: String, recipientPeerID: PeerID, senderPeerID: PeerID) -> String? {
         guard type == .delivered || type == .readReceipt else { return nil }
 
         var payload = Data([type.rawValue])
         payload.append(Data(messageID.utf8))
 
-        let recipientIDHex: String = normalizeRecipientPeerID(recipientPeerID)
+        let recipientID = normalizeRecipientPeerID(recipientPeerID)
 
         let packet = BitchatPacket(
             type: MessageType.noiseEncrypted.rawValue,
-            senderID: Data(hexString: senderPeerID) ?? Data(),
+            senderID: Data(hexString: senderPeerID.id) ?? Data(),
-            recipientID: Data(hexString: recipientIDHex),
+            recipientID: Data(hexString: recipientID.id),
             timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
             payload: payload,
             signature: nil,
@@ -54,7 +54,7 @@ struct NostrEmbeddedBitChat {
     }
 
     /// Build a `bitchat1:` ACK (delivered/read) without an embedded recipient peer ID (geohash DMs).
-    static func encodeAckForNostrNoRecipient(type: NoisePayloadType, messageID: String, senderPeerID: String) -> String? {
+    static func encodeAckForNostrNoRecipient(type: NoisePayloadType, messageID: String, senderPeerID: PeerID) -> String? {
         guard type == .delivered || type == .readReceipt else { return nil }
 
         var payload = Data([type.rawValue])
@@ -62,7 +62,7 @@ struct NostrEmbeddedBitChat {
 
         let packet = BitchatPacket(
             type: MessageType.noiseEncrypted.rawValue,
-            senderID: Data(hexString: senderPeerID) ?? Data(),
+            senderID: Data(hexString: senderPeerID.id) ?? Data(),
             recipientID: nil,
             timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
             payload: payload,
@@ -75,7 +75,7 @@ struct NostrEmbeddedBitChat {
     }
 
     /// Build a `bitchat1:` payload without an embedded recipient peer ID (used for geohash DMs).
-    static func encodePMForNostrNoRecipient(content: String, messageID: String, senderPeerID: String) -> String? {
+    static func encodePMForNostrNoRecipient(content: String, messageID: String, senderPeerID: PeerID) -> String? {
         let pm = PrivateMessagePacket(messageID: messageID, content: content)
         guard let tlv = pm.encode() else { return nil }
 
@@ -84,7 +84,7 @@ struct NostrEmbeddedBitChat {
 
         let packet = BitchatPacket(
             type: MessageType.noiseEncrypted.rawValue,
-            senderID: Data(hexString: senderPeerID) ?? Data(),
+            senderID: Data(hexString: senderPeerID.id) ?? Data(),
             recipientID: nil,
             timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
             payload: payload,
@@ -96,11 +96,11 @@ struct NostrEmbeddedBitChat {
         return "bitchat1:" + base64URLEncode(data)
     }
 
-    private static func normalizeRecipientPeerID(_ recipientPeerID: String) -> String {
+    private static func normalizeRecipientPeerID(_ recipientPeerID: PeerID) -> PeerID {
-        if let maybeData = Data(hexString: recipientPeerID) {
+        if let maybeData = Data(hexString: recipientPeerID.id) {
             if maybeData.count == 32 {
                 // Treat as Noise static public key; derive peerID from fingerprint
-                return PeerID(publicKey: maybeData).id
+                return PeerID(publicKey: maybeData)
             } else if maybeData.count == 8 {
                 // Already an 8-byte peer ID
                 return recipientPeerID

bitchat/Protocols/BitchatProtocol.swift

@@ -178,7 +178,7 @@ protocol BitchatDelegate: AnyObject {
 
     // Bluetooth state updates for user notifications
     func didUpdateBluetoothState(_ state: CBManagerState)
-    func didReceivePublicMessage(from peerID: PeerID, nickname: String, content: String, timestamp: Date)
+    func didReceivePublicMessage(from peerID: PeerID, nickname: String, content: String, timestamp: Date, messageID: String?)
 }
 
 // Provide default implementation to make it effectively optional
@@ -195,7 +195,7 @@ extension BitchatDelegate {
         // Default empty implementation
     }
 
-    func didReceivePublicMessage(from peerID: PeerID, nickname: String, content: String, timestamp: Date) {
+    func didReceivePublicMessage(from peerID: PeerID, nickname: String, content: String, timestamp: Date, messageID: String?) {
         // Default empty implementation
     }
 }

bitchat/Services/BLE/MimeType.swift

@@ -0,0 +1,195 @@
+//
+// MimeType.swift
+// bitchat
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import UniformTypeIdentifiers
+
+// MARK: - Extensions for missing UTTypes
+
+extension UTType {
+    static let webP = UTType(importedAs: "image/webp")
+    static let aac  = UTType(importedAs: "audio/aac")
+    static let m4a  = UTType(importedAs: "audio/m4a")
+    static let ogg  = UTType(importedAs: "audio/ogg")
+}
+
+// MARK: - MimeType Enum
+
+enum MimeType: CaseIterable, Hashable {
+    case jpeg
+    case jpg
+    case png
+    case gif
+    case webp
+    case mp4Audio
+    case m4a
+    case aac
+    case mpeg
+    case mp3
+    case wav
+    case xWav
+    case ogg
+    case pdf
+    case octetStream
+
+    var utType: UTType {
+        switch self {
+        case .jpeg, .jpg:   .jpeg
+        case .png:          .png
+        case .gif:          .gif
+        case .webp:         .webP
+        case .aac:          .aac
+        case .m4a:          .m4a
+        case .mp4Audio:     .mpeg4Audio
+        case .mp3, .mpeg:   .mp3
+        case .wav, .xWav:   .wav
+        case .ogg:          .ogg
+        case .pdf:          .pdf
+        case .octetStream:  .data
+        }
+    }
+    
+    var category: Category {
+        switch self {
+        case .jpeg, .jpg, .png, .gif, .webp:
+            return .image
+        case .aac, .m4a, .mp4Audio, .mpeg, .mp3, .wav, .xWav, .ogg:
+            return .audio
+        case .pdf, .octetStream:
+            return .file
+        }
+    }
+
+
+    var mimeString: String {
+        switch self {
+        case .jpeg, .jpg:   "image/jpeg"
+        case .png:          "image/png"
+        case .gif:          "image/gif"
+        case .webp:         "image/webp"
+        case .mp4Audio:     "audio/mp4"
+        case .m4a:          "audio/m4a"
+        case .aac:          "audio/aac"
+        case .mpeg:         "audio/mpeg"
+        case .mp3:          "audio/mp3"
+        case .wav:          "audio/wav"
+        case .xWav:         "audio/x-wav"
+        case .ogg:          "audio/ogg"
+        case .pdf:          "application/pdf"
+        case .octetStream:  "application/octet-stream"
+        }
+    }
+    
+    var defaultExtension: String {
+        switch self {
+        case .jpeg, .jpg:           "jpg"
+        case .png:                  "png"
+        case .webp:                 "webp"
+        case .gif:                  "gif"
+        case .mp4Audio, .m4a, .aac: "m4a"
+        case .mpeg, .mp3:           "mp3"
+        case .wav, .xWav:           "wav"
+        case .ogg:                  "ogg"
+        case .pdf:                  "pdf"
+        case .octetStream:          "bin"
+        }
+    }
+
+    static var allowed: Set<MimeType> = [
+        .jpeg, .jpg, .png, .gif, .webp,
+        .mp4Audio, .m4a, .aac, .mpeg, .mp3,
+        .wav, .xWav, .ogg,
+        .pdf, .octetStream
+    ]
+
+    var isAllowed: Bool {
+        Self.allowed.contains(self)
+    }
+
+    // MARK: - Byte signature validation
+    func matches(data: Data) -> Bool {
+        guard !data.isEmpty else { return false }
+
+        // Generic type → skip validation
+        if self == .octetStream { return true }
+
+        switch self {
+        case .jpeg, .jpg:
+            return data.count >= 3 && data[0] == 0xFF && data[1] == 0xD8 && data[2] == 0xFF
+
+        case .png:
+            return data.count >= 8 &&
+                   data[0] == 0x89 && data[1] == 0x50 && data[2] == 0x4E && data[3] == 0x47 &&
+                   data[4] == 0x0D && data[5] == 0x0A && data[6] == 0x1A && data[7] == 0x0A
+
+        case .gif:
+            return data.count >= 6 && data[0] == 0x47 && data[1] == 0x49 && data[2] == 0x46 &&
+                   data[3] == 0x38 && (data[4] == 0x37 || data[4] == 0x39) && data[5] == 0x61
+
+        case .webp:
+            return data.count >= 12 &&
+                   data[0] == 0x52 && data[1] == 0x49 && data[2] == 0x46 && data[3] == 0x46 &&
+                   data[8] == 0x57 && data[9] == 0x45 && data[10] == 0x42 && data[11] == 0x50
+
+        case .m4a, .mp4Audio, .aac:
+            // AVAudioRecorder output varies by platform - be lenient
+            // Security: size already capped + sandboxed execution
+            return data.count > 100
+
+        case .mpeg, .mp3:
+            if data.count >= 3 && data[0] == 0x49 && data[1] == 0x44 && data[2] == 0x33 {
+                return true // ID3 header
+            }
+            return data.count >= 2 && data[0] == 0xFF && (data[1] & 0xE0) == 0xE0
+
+        case .wav, .xWav:
+            return data.count >= 12 &&
+                   data[0] == 0x52 && data[1] == 0x49 && data[2] == 0x46 && data[3] == 0x46 &&
+                   data[8] == 0x57 && data[9] == 0x41 && data[10] == 0x56 && data[11] == 0x45
+
+        case .ogg:
+            return data.count >= 4 &&
+                   data[0] == 0x4F && data[1] == 0x67 && data[2] == 0x67 && data[3] == 0x53
+
+        case .pdf:
+            return data.count >= 4 &&
+                   data[0] == 0x25 && data[1] == 0x50 && data[2] == 0x44 && data[3] == 0x46
+
+        default:
+            return false
+        }
+    }
+
+    // MARK: - Convenience Initializers
+
+    init?(_ mimeString: String?) {
+        guard let mimeString else { return nil }
+        
+        let normalized = mimeString.lowercased()
+
+        // Direct match with our canonical list
+        if let match = MimeType.allCases.first(where: { $0.mimeString == normalized }) {
+            self = match
+            return
+        }
+
+        // Let UTType normalize aliases like "image/jpg", "audio/x-wav", etc.
+        if let type = UTType(mimeType: normalized),
+           let match = MimeType.allCases.first(where: { type.conforms(to: $0.utType) }) {
+            self = match
+            return
+        }
+
+        return nil
+    }
+}
+
+extension MimeType {
+    enum Category: String {
+        case audio, image, file
+    }
+}

bitchat/Services/NoiseEncryptionService.swift

@@ -177,18 +177,18 @@ final class NoiseEncryptionService {
     private let rekeyCheckInterval: TimeInterval = 60.0 // Check every minute
     
     // Callbacks
-    private var onPeerAuthenticatedHandlers: [((String, String) -> Void)] = [] // Array of handlers for peer authentication
+    private var onPeerAuthenticatedHandlers: [((PeerID, String) -> Void)] = [] // Array of handlers for peer authentication
     var onHandshakeRequired: ((PeerID) -> Void)? // peerID needs handshake
     
     // Add a handler for peer authentication
-    func addOnPeerAuthenticatedHandler(_ handler: @escaping (String, String) -> Void) {
+    func addOnPeerAuthenticatedHandler(_ handler: @escaping (PeerID, String) -> Void) {
         serviceQueue.async(flags: .barrier) { [weak self] in
             self?.onPeerAuthenticatedHandlers.append(handler)
         }
     }
     
     // Legacy support - setting this will add to the handlers array
-    var onPeerAuthenticated: ((String, String) -> Void)? {
+    var onPeerAuthenticated: ((PeerID, String) -> Void)? {
         get { nil } // Always return nil for backward compatibility
         set {
             if let handler = newValue {
@@ -546,7 +546,7 @@ final class NoiseEncryptionService {
         // Notify all handlers about authentication
         serviceQueue.async { [weak self] in
             self?.onPeerAuthenticatedHandlers.forEach { handler in
-                handler(peerID.id, fingerprint)
+                handler(peerID, fingerprint)
             }
         }
     }

bitchat/Services/NostrTransport.swift

@@ -82,7 +82,7 @@ final class NostrTransport: Transport {
                 SecureLogger.error("NostrTransport: failed to decode npub -> hex: \(error)", category: .session)
                 return
             }
-            guard let embedded = NostrEmbeddedBitChat.encodePMForNostr(content: content, messageID: messageID, recipientPeerID: peerID.id, senderPeerID: senderPeerID.id) else {
+            guard let embedded = NostrEmbeddedBitChat.encodePMForNostr(content: content, messageID: messageID, recipientPeerID: peerID, senderPeerID: senderPeerID) else {
                 SecureLogger.error("NostrTransport: failed to embed PM packet", category: .session)
                 return
             }
@@ -114,7 +114,7 @@ final class NostrTransport: Transport {
                 guard hrp == "npub" else { return }
                 recipientHex = data.hexEncodedString()
             } catch { return }
-            guard let embedded = NostrEmbeddedBitChat.encodePMForNostr(content: content, messageID: UUID().uuidString, recipientPeerID: peerID.id, senderPeerID: senderPeerID.id) else {
+            guard let embedded = NostrEmbeddedBitChat.encodePMForNostr(content: content, messageID: UUID().uuidString, recipientPeerID: peerID, senderPeerID: senderPeerID) else {
                 SecureLogger.error("NostrTransport: failed to embed favorite notification", category: .session)
                 return
             }
@@ -139,7 +139,7 @@ final class NostrTransport: Transport {
                 guard hrp == "npub" else { return }
                 recipientHex = data.hexEncodedString()
             } catch { return }
-            guard let ack = NostrEmbeddedBitChat.encodeAckForNostr(type: .delivered, messageID: messageID, recipientPeerID: peerID.id, senderPeerID: senderPeerID.id) else {
+            guard let ack = NostrEmbeddedBitChat.encodeAckForNostr(type: .delivered, messageID: messageID, recipientPeerID: peerID, senderPeerID: senderPeerID) else {
                 SecureLogger.error("NostrTransport: failed to embed DELIVERED ack", category: .session)
                 return
             }
@@ -161,7 +161,7 @@ extension NostrTransport {
     func sendDeliveryAckGeohash(for messageID: String, toRecipientHex recipientHex: String, from identity: NostrIdentity) {
         Task { @MainActor in
             SecureLogger.debug("GeoDM: send DELIVERED -> recip=\(recipientHex.prefix(8))… mid=\(messageID.prefix(8))… from=\(identity.publicKeyHex.prefix(8))…", category: .session)
-            guard let embedded = NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .delivered, messageID: messageID, senderPeerID: senderPeerID.id) else { return }
+            guard let embedded = NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .delivered, messageID: messageID, senderPeerID: senderPeerID) else { return }
             guard let event = try? NostrProtocol.createPrivateMessage(content: embedded, recipientPubkey: recipientHex, senderIdentity: identity) else { return }
             NostrRelayManager.registerPendingGiftWrap(id: event.id)
             NostrRelayManager.shared.sendEvent(event)
@@ -171,7 +171,7 @@ extension NostrTransport {
     func sendReadReceiptGeohash(_ messageID: String, toRecipientHex recipientHex: String, from identity: NostrIdentity) {
         Task { @MainActor in
             SecureLogger.debug("GeoDM: send READ -> recip=\(recipientHex.prefix(8))… mid=\(messageID.prefix(8))… from=\(identity.publicKeyHex.prefix(8))…", category: .session)
-            guard let embedded = NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .readReceipt, messageID: messageID, senderPeerID: senderPeerID.id) else { return }
+            guard let embedded = NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .readReceipt, messageID: messageID, senderPeerID: senderPeerID) else { return }
             guard let event = try? NostrProtocol.createPrivateMessage(content: embedded, recipientPubkey: recipientHex, senderIdentity: identity) else { return }
             NostrRelayManager.registerPendingGiftWrap(id: event.id)
             NostrRelayManager.shared.sendEvent(event)
@@ -184,7 +184,7 @@ extension NostrTransport {
             guard !recipientHex.isEmpty else { return }
             SecureLogger.debug("GeoDM: send PM -> recip=\(recipientHex.prefix(8))… mid=\(messageID.prefix(8))… from=\(identity.publicKeyHex.prefix(8))…", category: .session)
             // Build embedded BitChat packet without recipient peer ID
-            guard let embedded = NostrEmbeddedBitChat.encodePMForNostrNoRecipient(content: content, messageID: messageID, senderPeerID: senderPeerID.id) else {
+            guard let embedded = NostrEmbeddedBitChat.encodePMForNostrNoRecipient(content: content, messageID: messageID, senderPeerID: senderPeerID) else {
                 SecureLogger.error("NostrTransport: failed to embed geohash PM packet", category: .session)
                 return
             }
@@ -223,7 +223,7 @@ extension NostrTransport {
                 guard hrp == "npub" else { scheduleNextReadAck(); return }
                 recipientHex = data.hexEncodedString()
             } catch { scheduleNextReadAck(); return }
-            guard let ack = NostrEmbeddedBitChat.encodeAckForNostr(type: .readReceipt, messageID: item.receipt.originalMessageID, recipientPeerID: item.peerID.id, senderPeerID: senderPeerID.id) else {
+            guard let ack = NostrEmbeddedBitChat.encodeAckForNostr(type: .readReceipt, messageID: item.receipt.originalMessageID, recipientPeerID: item.peerID, senderPeerID: senderPeerID) else {
                 SecureLogger.error("NostrTransport: failed to embed READ ack", category: .session)
                 scheduleNextReadAck(); return
             }

bitchat/Services/NotificationService.swift

@@ -29,28 +29,30 @@ final class NotificationService {
         }
     }
     
-    func sendLocalNotification(title: String, body: String, identifier: String, userInfo: [String: Any]? = nil) {
+    func sendLocalNotification(
-        // For now, skip app state check entirely to avoid thread issues
+        title: String,
-        // The NotificationDelegate will handle foreground presentation
+        body: String,
-        DispatchQueue.main.async {
+        identifier: String,
-            let content = UNMutableNotificationContent()
+        userInfo: [String: Any]? = nil,
-            content.title = title
+        interruptionLevel: UNNotificationInterruptionLevel = .active
-            content.body = body
+    ) {
-            content.sound = .default
+        let content = UNMutableNotificationContent()
-            if let userInfo = userInfo {
+        content.title = title
-                content.userInfo = userInfo
+        content.body = body
-            }
+        content.sound = .default
-            
+        content.interruptionLevel = interruptionLevel
-            let request = UNNotificationRequest(
+
-                identifier: identifier,
+        if let userInfo = userInfo {
-                content: content,
+            content.userInfo = userInfo
-                trigger: nil // Deliver immediately
-            )
-            
-            UNUserNotificationCenter.current().add(request) { _ in
-                // Notification added
-            }
         }
+
+        let request = UNNotificationRequest(
+            identifier: identifier,
+            content: content,
+            trigger: nil // Deliver immediately
+        )
+
+        UNUserNotificationCenter.current().add(request)
     }
     
     func sendMentionNotification(from sender: String, message: String) {
@@ -61,11 +63,11 @@ final class NotificationService {
         sendLocalNotification(title: title, body: body, identifier: identifier)
     }
     
-    func sendPrivateMessageNotification(from sender: String, message: String, peerID: String) {
+    func sendPrivateMessageNotification(from sender: String, message: String, peerID: PeerID) {
         let title = "🔒 DM from \(sender)"
         let body = message
         let identifier = "private-\(UUID().uuidString)"
-        let userInfo = ["peerID": peerID, "senderName": sender]
+        let userInfo = ["peerID": peerID.id, "senderName": sender]
         
         sendLocalNotification(title: title, body: body, identifier: identifier, userInfo: userInfo)
     }
@@ -83,25 +85,12 @@ final class NotificationService {
         let title = "👥 bitchatters nearby!"
         let body = peerCount == 1 ? "1 person around" : "\(peerCount) people around"
         let identifier = "network-available-\(Date().timeIntervalSince1970)"
-        
+
-        // For network notifications, we want to show them even in foreground
+        sendLocalNotification(
-        // No app state check - let the notification delegate handle presentation
+            title: title,
-        DispatchQueue.main.async {
+            body: body,
-            let content = UNMutableNotificationContent()
+            identifier: identifier,
-            content.title = title
+            interruptionLevel: .timeSensitive
-            content.body = body
+        )
-            content.sound = .default
-            content.interruptionLevel = .timeSensitive  // Make it more prominent
-            
-            let request = UNNotificationRequest(
-                identifier: identifier,
-                content: content,
-                trigger: nil // Deliver immediately
-            )
-            
-            UNUserNotificationCenter.current().add(request) { _ in
-                // Notification added
-            }
-        }
     }
 }

bitchat/Services/PrivateChatManager.swift

@@ -105,7 +105,7 @@ final class PrivateChatManager: ObservableObject {
         // Create read receipt using the simplified method
         let receipt = ReadReceipt(
             originalMessageID: message.id,
-            readerID: meshService?.myPeerID.id ?? "",
+            readerID: meshService?.myPeerID ?? PeerID(str: ""),
             readerNickname: meshService?.myNickname ?? ""
         )
         

bitchat/Services/RelayController.swift

@@ -13,6 +13,7 @@ struct RelayController {
                        senderIsSelf: Bool,
                        isEncrypted: Bool,
                        isDirectedEncrypted: Bool,
+                       isFragment: Bool,
                        isDirectedFragment: Bool,
                        isHandshake: Bool,
                        isAnnounce: Bool,
@@ -36,6 +37,16 @@ struct RelayController {
             return RelayDecision(shouldRelay: true, newTTL: newTTL, delayMs: delayMs)
         }
 
+        if isFragment {
+            let ttlLimit = min(ttlCap, TransportConfig.bleFragmentRelayTtlCap)
+            guard ttlLimit > 1 else {
+                return RelayDecision(shouldRelay: false, newTTL: ttlLimit, delayMs: 0)
+            }
+            let newTTL = ttlLimit &- 1
+            let delayMs = Int.random(in: TransportConfig.bleFragmentRelayMinDelayMs...TransportConfig.bleFragmentRelayMaxDelayMs)
+            return RelayDecision(shouldRelay: true, newTTL: newTTL, delayMs: delayMs)
+        }
+
         // TTL clamping for broadcast
         // - Dense graphs: keep lower but still allow multi-hop bridging
         // - Announces get a bit more headroom

bitchat/Services/Transport.swift

@@ -45,6 +45,7 @@ protocol Transport: AnyObject {
 
     // Messaging
     func sendMessage(_ content: String, mentions: [String])
+    func sendMessage(_ content: String, mentions: [String], messageID: String, timestamp: Date)
     func sendPrivateMessage(_ content: String, to peerID: PeerID, recipientNickname: String, messageID: String)
     func sendReadReceipt(_ receipt: ReadReceipt, to peerID: PeerID)
     func sendFavoriteNotification(to peerID: PeerID, isFavorite: Bool)
@@ -65,6 +66,10 @@ extension Transport {
     func sendFileBroadcast(_ packet: BitchatFilePacket, transferId: String) {}
     func sendFilePrivate(_ packet: BitchatFilePacket, to peerID: PeerID, transferId: String) {}
     func cancelTransfer(_ transferId: String) {}
+
+    func sendMessage(_ content: String, mentions: [String], messageID: String, timestamp: Date) {
+        sendMessage(content, mentions: mentions)
+    }
 }
 
 protocol TransportPeerEventsDelegate: AnyObject {

bitchat/Services/TransportConfig.swift

@@ -8,6 +8,10 @@ enum TransportConfig {
     static let messageTTLDefault: UInt8 = 7                 // Default TTL for mesh flooding
     static let bleMaxInFlightAssemblies: Int = 128          // Cap concurrent fragment assemblies
     static let bleHighDegreeThreshold: Int = 6              // For adaptive TTL/probabilistic relays
+    static let bleMaxConcurrentTransfers: Int = 2           // Limit simultaneous large media sends
+    static let bleFragmentRelayMinDelayMs: Int = 8          // Faster forwarding for media fragments
+    static let bleFragmentRelayMaxDelayMs: Int = 25         // Upper jitter bound for fragment relays
+    static let bleFragmentRelayTtlCap: UInt8 = 5            // Clamp fragment TTL to contain floods
 
     // UI / Storage Caps
     static let privateChatCap: Int = 1337
@@ -66,6 +70,7 @@ enum TransportConfig {
     static let uiAnimationMediumSeconds: TimeInterval = 0.2
     static let uiAnimationSidebarSeconds: TimeInterval = 0.25
     static let uiRecentCutoffFiveMinutesSeconds: TimeInterval = 5 * 60
+    static let uiMeshEmptyConfirmationSeconds: TimeInterval = 30.0
 
     // BLE maintenance & thresholds
     static let bleMaintenanceInterval: TimeInterval = 5.0
@@ -145,6 +150,9 @@ enum TransportConfig {
 
     // Geo relay directory
     static let geoRelayFetchIntervalSeconds: TimeInterval = 60 * 60 * 24
+    static let geoRelayRefreshCheckIntervalSeconds: TimeInterval = 60 * 60
+    static let geoRelayRetryInitialSeconds: TimeInterval = 60
+    static let geoRelayRetryMaxSeconds: TimeInterval = 60 * 60
 
     // BLE operational delays
     static let bleInitialAnnounceDelaySeconds: TimeInterval = 0.6

bitchat/Sync/GossipSyncManager.swift

@@ -8,6 +8,55 @@ final class GossipSyncManager {
         func signPacketForBroadcast(_ packet: BitchatPacket) -> BitchatPacket
     }
 
+    private struct PacketStore {
+        private(set) var packets: [String: BitchatPacket] = [:]
+        private(set) var order: [String] = []
+
+        mutating func insert(idHex: String, packet: BitchatPacket, capacity: Int) {
+            guard capacity > 0 else { return }
+            if packets[idHex] != nil {
+                packets[idHex] = packet
+                return
+            }
+            packets[idHex] = packet
+            order.append(idHex)
+            while order.count > capacity {
+                let victim = order.removeFirst()
+                packets.removeValue(forKey: victim)
+            }
+        }
+
+        func allPackets(isFresh: (BitchatPacket) -> Bool) -> [BitchatPacket] {
+            order.compactMap { key in
+                guard let packet = packets[key], isFresh(packet) else { return nil }
+                return packet
+            }
+        }
+
+        mutating func remove(where shouldRemove: (BitchatPacket) -> Bool) {
+            var nextOrder: [String] = []
+            for key in order {
+                guard let packet = packets[key] else { continue }
+                if shouldRemove(packet) {
+                    packets.removeValue(forKey: key)
+                } else {
+                    nextOrder.append(key)
+                }
+            }
+            order = nextOrder
+        }
+
+        mutating func removeExpired(isFresh: (BitchatPacket) -> Bool) {
+            remove { !isFresh($0) }
+        }
+    }
+
+    private struct SyncSchedule {
+        let types: SyncTypeFlags
+        let interval: TimeInterval
+        var lastSent: Date
+    }
+
     struct Config {
         var seenCapacity: Int = 1000          // max packets per sync (cap across types)
         var gcsMaxBytes: Int = 400           // filter size budget (128..1024)
@@ -16,25 +65,43 @@ final class GossipSyncManager {
         var maintenanceIntervalSeconds: TimeInterval = 30.0
         var stalePeerCleanupIntervalSeconds: TimeInterval = 60.0
         var stalePeerTimeoutSeconds: TimeInterval = 60.0
+        var fragmentCapacity: Int = 600
+        var fileTransferCapacity: Int = 200
+        var fragmentSyncIntervalSeconds: TimeInterval = 30.0
+        var fileTransferSyncIntervalSeconds: TimeInterval = 60.0
+        var messageSyncIntervalSeconds: TimeInterval = 15.0
     }
 
     private let myPeerID: PeerID
     private let config: Config
     weak var delegate: Delegate?
 
-    // Storage: broadcast messages (ordered by insert), and latest announce per sender
+    // Storage: broadcast packets by type, and latest announce per sender
-    private var messages: [String: BitchatPacket] = [:] // idHex -> packet
+    private var messages = PacketStore()
-    private var messageOrder: [String] = []
+    private var fragments = PacketStore()
-    private var latestAnnouncementByPeer: [String: (id: String, packet: BitchatPacket)] = [:]
+    private var fileTransfers = PacketStore()
+    private var latestAnnouncementByPeer: [PeerID: (id: String, packet: BitchatPacket)] = [:]
 
     // Timer
     private var periodicTimer: DispatchSourceTimer?
     private let queue = DispatchQueue(label: "mesh.sync", qos: .utility)
     private var lastStalePeerCleanup: Date = .distantPast
+    private var syncSchedules: [SyncSchedule] = []
 
     init(myPeerID: PeerID, config: Config = Config()) {
         self.myPeerID = myPeerID
         self.config = config
+        var schedules: [SyncSchedule] = []
+        if config.seenCapacity > 0 && config.messageSyncIntervalSeconds > 0 {
+            schedules.append(SyncSchedule(types: .publicMessages, interval: config.messageSyncIntervalSeconds, lastSent: .distantPast))
+        }
+        if config.fragmentCapacity > 0 && config.fragmentSyncIntervalSeconds > 0 {
+            schedules.append(SyncSchedule(types: .fragment, interval: config.fragmentSyncIntervalSeconds, lastSent: .distantPast))
+        }
+        if config.fileTransferCapacity > 0 && config.fileTransferSyncIntervalSeconds > 0 {
+            schedules.append(SyncSchedule(types: .fileTransfer, interval: config.fileTransferSyncIntervalSeconds, lastSent: .distantPast))
+        }
+        syncSchedules = schedules
     }
 
     func start() {
@@ -55,7 +122,18 @@ final class GossipSyncManager {
 
     func scheduleInitialSyncToPeer(_ peerID: PeerID, delaySeconds: TimeInterval = 5.0) {
         queue.asyncAfter(deadline: .now() + delaySeconds) { [weak self] in
-            self?.sendRequestSync(to: peerID)
+            guard let self = self else { return }
+            self.sendRequestSync(to: peerID, types: .publicMessages)
+            if self.config.fragmentCapacity > 0 && self.config.fragmentSyncIntervalSeconds > 0 {
+                self.queue.asyncAfter(deadline: .now() + 0.5) { [weak self] in
+                    self?.sendRequestSync(to: peerID, types: .fragment)
+                }
+            }
+            if self.config.fileTransferCapacity > 0 && self.config.fileTransferSyncIntervalSeconds > 0 {
+                self.queue.asyncAfter(deadline: .now() + 1.0) { [weak self] in
+                    self?.sendRequestSync(to: peerID, types: .fileTransfer)
+                }
+            }
         }
     }
 
@@ -87,47 +165,45 @@ final class GossipSyncManager {
     }
 
     private func _onPublicPacketSeen(_ packet: BitchatPacket) {
-        let mt = MessageType(rawValue: packet.type)
+        guard let messageType = MessageType(rawValue: packet.type) else { return }
         let isBroadcastRecipient: Bool = {
             guard let r = packet.recipientID else { return true }
             return r.count == 8 && r.allSatisfy { $0 == 0xFF }
         }()
-        let isBroadcastMessage = (mt == .message && isBroadcastRecipient)
-        let isAnnounce = (mt == .announce)
-        guard isBroadcastMessage || isAnnounce else { return }
 
-        // Reject expired packets to prevent ghost peers and old messages
+        switch messageType {
-        guard isPacketFresh(packet) else { return }
+        case .announce:
-
+            guard isPacketFresh(packet) else { return }
-        if isAnnounce {
             guard isAnnouncementFresh(packet) else {
-                let sender = packet.senderID.hexEncodedString().lowercased()
+                let sender = PeerID(hexData: packet.senderID)
-                removeState(forNormalizedPeerID: sender)
+                removeState(for: sender)
                 return
             }
-        }
+            let idHex = PacketIdUtil.computeId(packet).hexEncodedString()
-
+            let sender = PeerID(hexData: packet.senderID)
-        let idHex = PacketIdUtil.computeId(packet).hexEncodedString()
-
-        if isBroadcastMessage {
-            if messages[idHex] == nil {
-                messages[idHex] = packet
-                messageOrder.append(idHex)
-                // Enforce capacity
-                let cap = max(1, config.seenCapacity)
-                while messageOrder.count > cap {
-                    let victim = messageOrder.removeFirst()
-                    messages.removeValue(forKey: victim)
-                }
-            }
-        } else if isAnnounce {
-            let sender = packet.senderID.hexEncodedString().lowercased()
             latestAnnouncementByPeer[sender] = (id: idHex, packet: packet)
+        case .message:
+            guard isBroadcastRecipient else { return }
+            guard isPacketFresh(packet) else { return }
+            let idHex = PacketIdUtil.computeId(packet).hexEncodedString()
+            messages.insert(idHex: idHex, packet: packet, capacity: max(1, config.seenCapacity))
+        case .fragment:
+            guard isBroadcastRecipient else { return }
+            guard isPacketFresh(packet) else { return }
+            let idHex = PacketIdUtil.computeId(packet).hexEncodedString()
+            fragments.insert(idHex: idHex, packet: packet, capacity: max(1, config.fragmentCapacity))
+        case .fileTransfer:
+            guard isBroadcastRecipient else { return }
+            guard isPacketFresh(packet) else { return }
+            let idHex = PacketIdUtil.computeId(packet).hexEncodedString()
+            fileTransfers.insert(idHex: idHex, packet: packet, capacity: max(1, config.fileTransferCapacity))
+        default:
+            break
         }
     }
 
-    private func sendRequestSync() {
+    private func sendRequestSync(for types: SyncTypeFlags) {
-        let payload = buildGcsPayload()
+        let payload = buildGcsPayload(for: types)
         let pkt = BitchatPacket(
             type: MessageType.requestSync.rawValue,
             senderID: Data(hexString: myPeerID.id) ?? Data(),
@@ -141,8 +217,8 @@ final class GossipSyncManager {
         delegate?.sendPacket(signed)
     }
 
-    private func sendRequestSync(to peerID: PeerID) {
+    private func sendRequestSync(to peerID: PeerID, types: SyncTypeFlags) {
-        let payload = buildGcsPayload()
+        let payload = buildGcsPayload(for: types)
         var recipient = Data()
         var temp = peerID.id
         while temp.count >= 2 && recipient.count < 8 {
@@ -170,6 +246,7 @@ final class GossipSyncManager {
     }
 
     private func _handleRequestSync(from peerID: PeerID, request: RequestSyncPacket) {
+        let requestedTypes = (request.types ?? .publicMessages)
         // 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 {
@@ -177,60 +254,100 @@ final class GossipSyncManager {
             return GCSFilter.contains(sortedValues: sorted, candidate: bucket)
         }
 
-        // 1) Announcements: send latest per peer if requester lacks them (and not expired)
+        if requestedTypes.contains(.announce) {
-        for (_, pair) in latestAnnouncementByPeer {
+            for (_, pair) in latestAnnouncementByPeer {
-            let (idHex, pkt) = pair
+                let (idHex, pkt) = pair
-            guard isPacketFresh(pkt) else { continue }
+                guard isPacketFresh(pkt) else { continue }
-            let idBytes = Data(hexString: idHex) ?? Data()
+                let idBytes = Data(hexString: idHex) ?? Data()
-            if !mightContain(idBytes) {
+                if !mightContain(idBytes) {
-                var toSend = pkt
+                    var toSend = pkt
-                toSend.ttl = 0
+                    toSend.ttl = 0
-                delegate?.sendPacket(to: peerID, packet: toSend)
+                    delegate?.sendPacket(to: peerID, packet: toSend)
+                }
             }
         }
 
-        // 2) Broadcast messages: send all missing (and not expired)
+        if requestedTypes.contains(.message) {
-        let toSendMsgs = messageOrder.compactMap { messages[$0] }
+            let toSendMsgs = messages.allPackets(isFresh: isPacketFresh)
-        for pkt in toSendMsgs {
+            for pkt in toSendMsgs {
-            guard isPacketFresh(pkt) else { continue }
+                let idBytes = PacketIdUtil.computeId(pkt)
-            let idBytes = PacketIdUtil.computeId(pkt)
+                if !mightContain(idBytes) {
-            if !mightContain(idBytes) {
+                    var toSend = pkt
-                var toSend = pkt
+                    toSend.ttl = 0
-                toSend.ttl = 0
+                    delegate?.sendPacket(to: peerID, packet: toSend)
-                delegate?.sendPacket(to: peerID, packet: toSend)
+                }
+            }
+        }
+
+        if requestedTypes.contains(.fragment) {
+            let frags = fragments.allPackets(isFresh: isPacketFresh)
+            for pkt in frags {
+                let idBytes = PacketIdUtil.computeId(pkt)
+                if !mightContain(idBytes) {
+                    var toSend = pkt
+                    toSend.ttl = 0
+                    delegate?.sendPacket(to: peerID, packet: toSend)
+                }
+            }
+        }
+
+        if requestedTypes.contains(.fileTransfer) {
+            let files = fileTransfers.allPackets(isFresh: isPacketFresh)
+            for pkt in files {
+                let idBytes = PacketIdUtil.computeId(pkt)
+                if !mightContain(idBytes) {
+                    var toSend = pkt
+                    toSend.ttl = 0
+                    delegate?.sendPacket(to: peerID, packet: toSend)
+                }
             }
         }
     }
 
     // Build REQUEST_SYNC payload using current candidates and GCS params
-    private func buildGcsPayload() -> Data {
+    private func buildGcsPayload(for types: SyncTypeFlags) -> Data {
-        // Collect candidates: latest announce per peer + broadcast messages (only fresh)
         var candidates: [BitchatPacket] = []
-        candidates.reserveCapacity(latestAnnouncementByPeer.count + messageOrder.count)
+        if types.contains(.announce) {
-        for (_, pair) in latestAnnouncementByPeer {
+            for (_, pair) in latestAnnouncementByPeer where isPacketFresh(pair.packet) {
-            if isPacketFresh(pair.packet) {
                 candidates.append(pair.packet)
             }
         }
-        for id in messageOrder {
+        if types.contains(.message) {
-            if let p = messages[id], isPacketFresh(p) {
+            candidates.append(contentsOf: messages.allPackets(isFresh: isPacketFresh))
-                candidates.append(p)
-            }
         }
+        if types.contains(.fragment) {
+            candidates.append(contentsOf: fragments.allPackets(isFresh: isPacketFresh))
+        }
+        if types.contains(.fileTransfer) {
+            candidates.append(contentsOf: fileTransfers.allPackets(isFresh: isPacketFresh))
+        }
+        if candidates.isEmpty {
+            let p = GCSFilter.deriveP(targetFpr: config.gcsTargetFpr)
+            let req = RequestSyncPacket(p: p, m: 1, data: Data(), types: types)
+            return req.encode()
+        }
+
         // Sort by timestamp desc
         candidates.sort { $0.timestamp > $1.timestamp }
 
         let p = GCSFilter.deriveP(targetFpr: config.gcsTargetFpr)
         let nMax = GCSFilter.estimateMaxElements(sizeBytes: config.gcsMaxBytes, p: p)
-        let cap = max(1, config.seenCapacity)
+        let cap: Int
+        if types == .fragment {
+            cap = max(1, config.fragmentCapacity)
+        } else if types == .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())
+            let req = RequestSyncPacket(p: p, m: 1, data: Data(), types: types)
             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)
+        let req = RequestSyncPacket(p: params.p, m: params.m, data: params.data, types: types)
         return req.encode()
     }
 
@@ -241,20 +358,21 @@ final class GossipSyncManager {
             isPacketFresh(pair.packet)
         }
 
-        // Remove expired messages
+        messages.removeExpired(isFresh: isPacketFresh)
-        let expiredMessageIds = messages.compactMap { id, pkt in
+        fragments.removeExpired(isFresh: isPacketFresh)
-            isPacketFresh(pkt) ? nil : id
+        fileTransfers.removeExpired(isFresh: isPacketFresh)
-        }
-        for id in expiredMessageIds {
-            messages.removeValue(forKey: id)
-            messageOrder.removeAll { $0 == id }
-        }
     }
 
     private func performPeriodicMaintenance(now: Date = Date()) {
         cleanupExpiredMessages()
         cleanupStaleAnnouncementsIfNeeded(now: now)
-        sendRequestSync()
+        for index in syncSchedules.indices {
+            guard syncSchedules[index].interval > 0 else { continue }
+            if syncSchedules[index].lastSent == .distantPast || now.timeIntervalSince(syncSchedules[index].lastSent) >= syncSchedules[index].interval {
+                syncSchedules[index].lastSent = now
+                sendRequestSync(for: syncSchedules[index].types)
+            }
+        }
     }
 
     private func cleanupStaleAnnouncementsIfNeeded(now: Date) {
@@ -270,40 +388,27 @@ final class GossipSyncManager {
         let nowMs = UInt64(now.timeIntervalSince1970 * 1000)
         guard nowMs >= timeoutMs else { return }
         let cutoff = nowMs - timeoutMs
-        let stalePeerIDs = latestAnnouncementByPeer.compactMap { (peerHex, pair) -> String? in
+        let stalePeerIDs = latestAnnouncementByPeer.compactMap { peerID, pair in
-            pair.packet.timestamp < cutoff ? peerHex.lowercased() : nil
+            pair.packet.timestamp < cutoff ? peerID : nil
         }
         guard !stalePeerIDs.isEmpty else { return }
         for peerKey in stalePeerIDs {
-            removeState(forNormalizedPeerID: peerKey)
+            removeState(for: peerKey)
         }
     }
 
     // Explicit removal hook for LEAVE/stale peer
     func removeAnnouncementForPeer(_ peerID: PeerID) {
         queue.async { [weak self] in
-            self?._removeAnnouncementForPeer(peerID)
+            self?.removeState(for: peerID)
         }
     }
 
-    private func _removeAnnouncementForPeer(_ peerID: PeerID) {
+    private func removeState(for peerID: PeerID) {
-        let normalizedPeerID = peerID.id.lowercased()
+        _ = latestAnnouncementByPeer.removeValue(forKey: peerID)
-        removeState(forNormalizedPeerID: normalizedPeerID)
+        messages.remove { PeerID(hexData: $0.senderID) == peerID }
-    }
+        fragments.remove { PeerID(hexData: $0.senderID) == peerID }
-
+        fileTransfers.remove { PeerID(hexData: $0.senderID) == peerID }
-    private func removeState(forNormalizedPeerID normalizedPeerID: String) {
-        _ = latestAnnouncementByPeer.removeValue(forKey: normalizedPeerID)
-        // Remove messages from this peer
-        // Collect IDs to remove first to avoid concurrent modification
-        let messageIdsToRemove = messages.compactMap { (id, message) -> String? in
-            message.senderID.hexEncodedString().lowercased() == normalizedPeerID ? id : nil
-        }
-        
-        // Remove messages and update messageOrder
-        for id in messageIdsToRemove {
-            messages.removeValue(forKey: id)
-            messageOrder.removeAll { $0 == id }
-        }
     }
 }
 
@@ -317,13 +422,13 @@ extension GossipSyncManager {
 
     func _hasAnnouncement(for peerID: PeerID) -> Bool {
         queue.sync {
-            latestAnnouncementByPeer[peerID.id.lowercased()] != nil
+            latestAnnouncementByPeer[peerID] != nil
         }
     }
 
     func _messageCount(for peerID: PeerID) -> Int {
         queue.sync {
-            messages.values.filter { $0.senderID.hexEncodedString().lowercased() == peerID.id.lowercased() }.count
+            messages.allPackets { _ in true }.filter { PeerID(hexData: $0.senderID) == peerID }.count
         }
     }
 }

bitchat/Sync/SyncTypeFlags.swift

@@ -0,0 +1,104 @@
+import Foundation
+
+/// Bitfield describing which message types are covered by a REQUEST_SYNC round.
+/// Matches the Android mapping (bit index -> message type).
+struct SyncTypeFlags: OptionSet {
+    let rawValue: UInt64
+
+    init(rawValue: UInt64) {
+        self.rawValue = rawValue & 0x00FF_FFFF_FFFF_FFFF // Trim to max 8 bytes
+    }
+
+    private static func bitIndex(for type: MessageType) -> Int? {
+        switch type {
+        case .announce: return 0
+        case .message: return 1
+        case .leave: return 2
+        case .noiseHandshake: return 3
+        case .noiseEncrypted: return 4
+        case .fragment: return 5
+        case .requestSync: return 6
+        case .fileTransfer: return 7
+        }
+    }
+
+    private static func type(forBit index: Int) -> MessageType? {
+        switch index {
+        case 0: return .announce
+        case 1: return .message
+        case 2: return .leave
+        case 3: return .noiseHandshake
+        case 4: return .noiseEncrypted
+        case 5: return .fragment
+        case 6: return .requestSync
+        case 7: return .fileTransfer
+        default:
+            return nil
+        }
+    }
+
+    static let announce = SyncTypeFlags(messageTypes: [.announce])
+    static let message = SyncTypeFlags(messageTypes: [.message])
+    static let fragment = SyncTypeFlags(messageTypes: [.fragment])
+    static let fileTransfer = SyncTypeFlags(messageTypes: [.fileTransfer])
+
+    static let publicMessages = SyncTypeFlags(messageTypes: [.announce, .message])
+
+    init(messageTypes: [MessageType]) {
+        var raw: UInt64 = 0
+        for type in messageTypes {
+            guard let bit = SyncTypeFlags.bitIndex(for: type) else { continue }
+            raw |= (1 << UInt64(bit))
+        }
+        self.init(rawValue: raw)
+    }
+
+    func contains(_ type: MessageType) -> Bool {
+        guard let bit = SyncTypeFlags.bitIndex(for: type) else { return false }
+        return contains(SyncTypeFlags(rawValue: 1 << UInt64(bit)))
+    }
+
+    func union(_ other: SyncTypeFlags) -> SyncTypeFlags {
+        SyncTypeFlags(rawValue: rawValue | other.rawValue)
+    }
+
+    func intersection(_ other: SyncTypeFlags) -> SyncTypeFlags {
+        SyncTypeFlags(rawValue: rawValue & other.rawValue)
+    }
+
+    func toMessageTypes() -> [MessageType] {
+        guard rawValue != 0 else { return [] }
+        var types: [MessageType] = []
+        for bit in 0..<64 {
+            guard (rawValue & (1 << UInt64(bit))) != 0 else { continue }
+            if let type = SyncTypeFlags.type(forBit: bit) {
+                types.append(type)
+            }
+        }
+        return types
+    }
+
+    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 }
+        return Data(bytes)
+    }
+
+    static func decode(_ 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)
+    }
+}

bitchat/Utils/CompressionUtil.swift

@@ -61,15 +61,13 @@ struct CompressionUtil {
         // 1. Data is too small
         // 2. Data appears to be already compressed (high entropy)
         guard data.count >= compressionThreshold else { return false }
-        
+
-        // Simple entropy check - count unique bytes
+        // Quick uniqueness check — a high diversity of bytes usually means the
-        var byteFrequency = [UInt8: Int]()
+        // payload is already compressed. We only need to know how many unique
-        for byte in data {
+        // values exist rather than keeping full frequency counts.
-            byteFrequency[byte, default: 0] += 1
+        let uniqueByteCount = Set(data).count
-        }
+        let sampleSize = min(data.count, 256)
-        
+        let uniqueByteRatio = Double(uniqueByteCount) / Double(sampleSize)
-        // If we have very high byte diversity, data is likely already compressed
-        let uniqueByteRatio = Double(byteFrequency.count) / Double(min(data.count, 256))
         return uniqueByteRatio < 0.9 // Compress if less than 90% unique bytes
     }
 }

bitchat/Utils/FileTransferLimits.swift

@@ -5,9 +5,9 @@ enum FileTransferLimits {
     /// Absolute ceiling enforced for any file payload (voice, image, other).
     static let maxPayloadBytes: Int = 1 * 1024 * 1024 // 1 MiB
     /// Voice notes stay small for low-latency relays.
-    static let maxVoiceNoteBytes: Int = 1 * 1024 * 1024 // 1 MiB
+    static let maxVoiceNoteBytes: Int = 512 * 1024 // 512 KiB
     /// Compressed images after downscaling should comfortably fit under this budget.
-    static let maxImageBytes: Int = 1 * 1024 * 1024 // 1 MiB
+    static let maxImageBytes: Int = 512 * 1024 // 512 KiB
     /// Worst-case size once TLV metadata and binary packet framing are included for the largest payloads.
     static let maxFramedFileBytes: Int = {
         let maxMetadataBytes = Int(UInt16.max) * 2 // fileName + mimeType TLVs

bitchat/Utils/InputValidator.swift

@@ -1,4 +1,5 @@
 import Foundation
+import BitLogger
 
 /// Comprehensive input validation for BitChat protocol
 /// Prevents injection attacks, buffer overflows, and malformed data
@@ -16,29 +17,28 @@ struct InputValidator {
     // MARK: - String Content Validation
     
     /// Validates and sanitizes user-provided strings used in UI
+    ///
+    /// Rejects strings containing control characters to prevent potential security issues
+    /// and UI rendering problems. This strict approach ensures data integrity at input time.
     static func validateUserString(_ string: String, maxLength: Int) -> String? {
-        // Check empty
-        guard !string.isEmpty else { return nil }
-
-        // Trim whitespace
         let trimmed = string.trimmingCharacters(in: .whitespacesAndNewlines)
         guard !trimmed.isEmpty else { return nil }
-
-        // Check length
         guard trimmed.count <= maxLength else { return nil }
 
-        // Remove control characters
+        // Reject control characters outright instead of rewriting the string.
+        // This prevents injection attacks and ensures consistent UI rendering.
         let controlChars = CharacterSet.controlCharacters
-        let cleaned = trimmed.components(separatedBy: controlChars).joined()
+        if !trimmed.unicodeScalars.allSatisfy({ !controlChars.contains($0) }) {
-        
+            // Log rejection for monitoring, without exposing actual content for privacy
-        // Ensure valid UTF-8 (should already be, but double-check)
+            let controlCharCount = trimmed.unicodeScalars.filter { controlChars.contains($0) }.count
-        guard cleaned.data(using: .utf8) != nil else { return nil }
+            SecureLogger.debug(
-        
+                "Input validation rejected string (length: \(trimmed.count), control chars: \(controlCharCount))",
-        // Prevent zero-width characters and other invisible unicode
+                category: .security
-        let invisibleChars = CharacterSet(charactersIn: "\u{200B}\u{200C}\u{200D}\u{FEFF}")
+            )
-        let visible = cleaned.components(separatedBy: invisibleChars).joined()
+            return nil
-        
+        }
-        return visible.isEmpty ? nil : visible
+
+        return trimmed
     }
     
     /// Validates nickname

bitchat/ViewModels/ChatViewModel.swift

@@ -145,6 +145,19 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         }
     }
 
+    private typealias GeoOutgoingContext = (channel: GeohashChannel, event: NostrEvent, identity: NostrIdentity, teleported: Bool)
+
+    @MainActor
+    private var canSendMediaInCurrentContext: Bool {
+        if let peer = selectedPrivateChatPeer {
+            return !(peer.isGeoDM || peer.isGeoChat)
+        }
+        switch activeChannel {
+        case .mesh: return true
+        case .location: return false
+        }
+    }
+
     private var rateBucketsBySender: [String: TokenBucket] = [:]
     private var rateBucketsByContent: [String: TokenBucket] = [:]
     private let senderBucketCapacity: Double = TransportConfig.uiSenderRateBucketCapacity
@@ -158,7 +171,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             if spid.isGeoChat || spid.isGeoDM {
                 let full = (nostrKeyMapping[spid] ?? spid.bare).lowercased()
                 return "nostr:" + full
-            } else if spid.id.count == 16, let full = getNoiseKeyForShortID(spid)?.lowercased() {
+            } else if spid.id.count == 16, let full = getNoiseKeyForShortID(spid)?.id.lowercased() {
                 return "noise:" + full
             } else {
                 return "mesh:" + spid.id.lowercased()
@@ -235,10 +248,10 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
     @Published var currentColorScheme: ColorScheme = .light
     private let maxMessages = TransportConfig.meshTimelineCap // Maximum messages before oldest are removed
     @Published var isConnected = false
-    private var hasNotifiedNetworkAvailable = false
     private var recentlySeenPeers: Set<PeerID> = []
     private var lastNetworkNotificationTime = Date.distantPast
     private var networkResetTimer: Timer? = nil
+    private var networkEmptyTimer: Timer? = nil
     private let networkResetGraceSeconds: TimeInterval = TransportConfig.networkResetGraceSeconds // avoid refiring on short drops/reconnects
     @Published var nickname: String = "" {
         didSet {
@@ -248,7 +261,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
                 nickname = trimmed
             }
             // Update mesh service nickname if it's initialized
-            if meshService.myPeerID != "" {
+            if !meshService.myPeerID.isEmpty {
                 meshService.setNickname(nickname)
             }
         }
@@ -315,16 +328,16 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
     private var peerIDToPublicKeyFingerprint: [PeerID: String] = [:]
     private var selectedPrivateChatFingerprint: String? = nil
     // Map stable short peer IDs (16-hex) to full Noise public key hex (64-hex) for session continuity
-    private var shortIDToNoiseKey: [PeerID: String] = [:]
+    private var shortIDToNoiseKey: [PeerID: PeerID] = [:]
 
     // Resolve full Noise key for a peer's short ID (used by UI header rendering)
     @MainActor
-    private func getNoiseKeyForShortID(_ shortPeerID: PeerID) -> String? {
+    private func getNoiseKeyForShortID(_ shortPeerID: PeerID) -> PeerID? {
         if let mapped = shortIDToNoiseKey[shortPeerID] { return mapped }
         // Fallback: derive from active Noise session if available
         if shortPeerID.id.count == 16,
            let key = meshService.getNoiseService().getPeerPublicKeyData(shortPeerID) {
-            let stable = key.hexEncodedString()
+            let stable = PeerID(hexData: key)
             shortIDToNoiseKey[shortPeerID] = stable
             return stable
         }
@@ -333,16 +346,17 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
 
     // Resolve short mesh ID (16-hex) from a full Noise public key hex (64-hex)
     @MainActor
-    func getShortIDForNoiseKey(_ fullNoiseKeyHex: String) -> PeerID? {
+    func getShortIDForNoiseKey(_ fullNoiseKeyHex: PeerID) -> PeerID {
+        guard fullNoiseKeyHex.id.count == 64 else { return fullNoiseKeyHex }
         // Check known peers for a noise key match
-        if let match = allPeers.first(where: { $0.noisePublicKey.hexEncodedString() == fullNoiseKeyHex }) {
+        if let match = allPeers.first(where: { PeerID(hexData: $0.noisePublicKey) == fullNoiseKeyHex }) {
             return match.peerID
         }
         // Also search cache mapping
         if let pair = shortIDToNoiseKey.first(where: { $0.value == fullNoiseKeyHex }) {
             return pair.key
         }
-        return nil
+        return fullNoiseKeyHex
     }
     private var peerIndex: [PeerID: BitchatPeer] = [:]
     
@@ -1141,7 +1155,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
                 NotificationService.shared.sendPrivateMessageNotification(
                     from: senderName,
                     message: pm.content,
-                    peerID: convKey.id
+                    peerID: convKey
                 )
             }
         }
@@ -1443,20 +1457,48 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         // Parse mentions from the content (use original content for user intent)
         let mentions = parseMentions(from: content)
 
+        var geoContext: GeoOutgoingContext? = nil
+
         // Add message to local display
         var displaySender = nickname
         var localSenderPeerID = meshService.myPeerID
-        if case .location(let ch) = activeChannel,
+        var messageID: String? = nil
-           let myGeoIdentity = try? idBridge.deriveIdentity(forGeohash: ch.geohash) {
+        var messageTimestamp = Date()
-            let suffix = String(myGeoIdentity.publicKeyHex.suffix(4))
+
-            displaySender = nickname + "#" + suffix
+        switch activeChannel {
-            localSenderPeerID = PeerID(nostr: myGeoIdentity.publicKeyHex)
+        case .mesh:
+            break
+        case .location(let ch):
+            do {
+                let identity = try idBridge.deriveIdentity(forGeohash: ch.geohash)
+                let suffix = String(identity.publicKeyHex.suffix(4))
+                displaySender = nickname + "#" + suffix
+                localSenderPeerID = PeerID(nostr: identity.publicKeyHex)
+                let teleported = LocationChannelManager.shared.teleported
+                let event = try NostrProtocol.createEphemeralGeohashEvent(
+                    content: trimmed,
+                    geohash: ch.geohash,
+                    senderIdentity: identity,
+                    nickname: nickname,
+                    teleported: teleported
+                )
+                messageID = event.id
+                messageTimestamp = Date(timeIntervalSince1970: TimeInterval(event.created_at))
+                geoContext = (channel: ch, event: event, identity: identity, teleported: teleported)
+            } catch {
+                SecureLogger.error("❌ Failed to prepare geohash message: \(error)", category: .session)
+                addSystemMessage(
+                    String(localized: "system.location.send_failed", comment: "System message when a location channel send fails")
+                )
+                return
+            }
         }
 
         let message = BitchatMessage(
+            id: messageID,
             sender: displaySender,
             content: trimmed,
-            timestamp: Date(),
+            timestamp: messageTimestamp,
             isRelay: false,
             senderPeerID: localSenderPeerID,
             mentions: mentions.isEmpty ? nil : mentions
@@ -1487,69 +1529,75 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
 
         // UI updates automatically via @Published var messages
 
-        updateChannelActivityTimeThenSend(content: content, trimmed: trimmed, mentions: mentions)
+        updateChannelActivityTimeThenSend(content: content,
+                                          trimmed: trimmed,
+                                          mentions: mentions,
+                                          geoContext: geoContext,
+                                          messageID: message.id,
+                                          timestamp: message.timestamp)
     }
 
-    private func updateChannelActivityTimeThenSend(content: String, trimmed: String, mentions: [String]) {
+    private func updateChannelActivityTimeThenSend(content: String,
+                                                   trimmed: String,
+                                                   mentions: [String],
+                                                   geoContext: GeoOutgoingContext?,
+                                                   messageID: String,
+                                                   timestamp: Date) {
         switch activeChannel {
         case .mesh:
             lastPublicActivityAt["mesh"] = Date()
             // Send via mesh with mentions
-            meshService.sendMessage(content, mentions: mentions)
+            meshService.sendMessage(content, mentions: mentions, messageID: messageID, timestamp: timestamp)
         case .location(let ch):
             lastPublicActivityAt["geo:\(ch.geohash)"] = Date()
+            guard let context = geoContext, context.channel.geohash == ch.geohash else {
+                SecureLogger.error("Geo: missing send context for \(ch.geohash)", category: .session)
+                addSystemMessage(
+                    String(localized: "system.location.send_failed", comment: "System message when a location channel send fails")
+                )
+                return
+            }
             // Send to geohash channel via Nostr ephemeral
             Task { @MainActor in
-                sendGeohash(ch: ch, content: trimmed)
+                self.sendGeohash(context: context)
             }
         }
     }
     
     @MainActor
-    private func sendGeohash(ch: GeohashChannel, content: String) {
+    private func sendGeohash(context: GeoOutgoingContext) {
-        do {
+        let ch = context.channel
-            let identity = try idBridge.deriveIdentity(forGeohash: ch.geohash)
+        let event = context.event
+        let identity = context.identity
 
-            let event = try NostrProtocol.createEphemeralGeohashEvent(
+        let targetRelays = GeoRelayDirectory.shared.closestRelays(
-                content: content,
+            toGeohash: ch.geohash,
-                geohash: ch.geohash,
+            count: TransportConfig.nostrGeoRelayCount
-                senderIdentity: identity,
+        )
-                nickname: nickname,
-                teleported: LocationChannelManager.shared.teleported
-            )
-            
-            let targetRelays = GeoRelayDirectory.shared.closestRelays(
-                toGeohash: ch.geohash,
-                count: TransportConfig.nostrGeoRelayCount
-            )
-            
-            if targetRelays.isEmpty {
-                SecureLogger.warning("Geo: no geohash relays available for \(ch.geohash); not sending", category: .session)
-            } else {
-                NostrRelayManager.shared.sendEvent(event, to: targetRelays)
-            }
 
-            // Track ourselves as active participant
+        if targetRelays.isEmpty {
-            recordGeoParticipant(pubkeyHex: identity.publicKeyHex)
+            SecureLogger.warning("Geo: no geohash relays available for \(ch.geohash); not sending", category: .session)
-            nostrKeyMapping[PeerID(nostr: identity.publicKeyHex)] = identity.publicKeyHex
+        } else {
-            SecureLogger.debug("GeoTeleport: sent geo message pub=\(identity.publicKeyHex.prefix(8))… teleported=\(LocationChannelManager.shared.teleported)", category: .session)
+            NostrRelayManager.shared.sendEvent(event, to: targetRelays)
-            
-            // If we tagged this as teleported, also mark our pubkey in teleportedGeo for UI
-            // Only when not in our regional set (and regional list is known)
-            let hasRegional = !LocationChannelManager.shared.availableChannels.isEmpty
-            let inRegional = LocationChannelManager.shared.availableChannels.contains { $0.geohash == ch.geohash }
-            
-            if LocationChannelManager.shared.teleported && hasRegional && !inRegional {
-                let key = identity.publicKeyHex.lowercased()
-                teleportedGeo = teleportedGeo.union([key])
-                SecureLogger.info("GeoTeleport: mark self teleported key=\(key.prefix(8))… total=\(teleportedGeo.count)", category: .session)
-            }
-        } catch {
-            SecureLogger.error("❌ Failed to send geohash message: \(error)", category: .session)
-            addSystemMessage(
-                String(localized: "system.location.send_failed", comment: "System message when a location channel send fails")
-            )
         }
+
+        // Track ourselves as active participant
+        recordGeoParticipant(pubkeyHex: identity.publicKeyHex)
+        nostrKeyMapping[PeerID(nostr: identity.publicKeyHex)] = identity.publicKeyHex
+        SecureLogger.debug("GeoTeleport: sent geo message pub=\(identity.publicKeyHex.prefix(8))… teleported=\(context.teleported)", category: .session)
+
+        // If we tagged this as teleported, also mark our pubkey in teleportedGeo for UI
+        // Only when not in our regional set (and regional list is known)
+        let hasRegional = !LocationChannelManager.shared.availableChannels.isEmpty
+        let inRegional = LocationChannelManager.shared.availableChannels.contains { $0.geohash == ch.geohash }
+
+        if context.teleported && hasRegional && !inRegional {
+            let key = identity.publicKeyHex.lowercased()
+            teleportedGeo = teleportedGeo.union([key])
+            SecureLogger.info("GeoTeleport: mark self teleported key=\(key.prefix(8))… total=\(teleportedGeo.count)", category: .session)
+        }
+
+        recordProcessedEvent(event.id)
     }
 
     @MainActor
@@ -1838,7 +1886,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             NotificationService.shared.sendPrivateMessageNotification(
                 from: senderName,
                 message: pm.content,
-                peerID: convKey.id
+                peerID: convKey
             )
         }
         
@@ -1918,8 +1966,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
     func isSelfSender(peerID: PeerID?, displayName: String?) -> Bool {
         guard let peerID else { return false }
         if peerID == meshService.myPeerID { return true }
-        let lowerPeer = peerID.id.lowercased()
+        guard peerID.isGeoDM || peerID.isGeoChat else { return false }
-        guard lowerPeer.hasPrefix("nostr") else { return false }
 
         if let mapped = nostrKeyMapping[peerID]?.lowercased(),
            let gh = currentGeohash,
@@ -1929,10 +1976,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
 
         if let gh = currentGeohash,
            let myIdentity = try? idBridge.deriveIdentity(forGeohash: gh) {
-            let myLower = myIdentity.publicKeyHex.lowercased()
+            if peerID == PeerID(nostr: myIdentity.publicKeyHex) { return true }
-            let shortLen = TransportConfig.nostrShortKeyDisplayLength
-            let shortKey = "nostr:" + myLower.prefix(shortLen)
-            if lowerPeer == shortKey { return true }
             let suffix = myIdentity.publicKeyHex.suffix(4)
             let expected = (nickname + "#" + suffix).lowercased()
             if let display = displayName?.lowercased(), display == expected { return true }
@@ -2407,8 +2451,15 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
 
     @MainActor
     func sendVoiceNote(at url: URL) {
+        guard canSendMediaInCurrentContext else {
+            SecureLogger.info("Voice note blocked outside mesh/private context", category: .session)
+            try? FileManager.default.removeItem(at: url)
+            addSystemMessage("Voice notes are only available in mesh chats.")
+            return
+        }
+
         let targetPeer = selectedPrivateChatPeer
-        let message = enqueueMediaMessage(content: "[voice] \(url.lastPathComponent)", targetPeer: targetPeer?.id)
+        let message = enqueueMediaMessage(content: "[voice] \(url.lastPathComponent)", targetPeer: targetPeer)
         let messageID = message.id
         let transferId = makeTransferID(messageID: messageID)
 
@@ -2455,6 +2506,13 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
 
     @MainActor
     func sendImage(from sourceURL: URL, cleanup: (() -> Void)? = nil) {
+        guard canSendMediaInCurrentContext else {
+            SecureLogger.info("Image send blocked outside mesh/private context", category: .session)
+            cleanup?()
+            addSystemMessage("Images are only available in mesh chats.")
+            return
+        }
+
         let targetPeer = selectedPrivateChatPeer
 
         Task.detached(priority: .userInitiated) { [weak self] in
@@ -2480,7 +2538,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
                 )
                 guard packet.encode() != nil else { throw MediaSendError.encodingFailed }
                 await MainActor.run {
-                    let message = self.enqueueMediaMessage(content: "[image] \(outputURL.lastPathComponent)", targetPeer: targetPeer?.id)
+                    let message = self.enqueueMediaMessage(content: "[image] \(outputURL.lastPathComponent)", targetPeer: targetPeer)
                     let messageID = message.id
                     let transferId = self.makeTransferID(messageID: messageID)
                     self.registerTransfer(transferId: transferId, messageID: messageID)
@@ -2522,7 +2580,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
     }
 
     @MainActor
-    private func enqueueMediaMessage(content: String, targetPeer: String?) -> BitchatMessage {
+    private func enqueueMediaMessage(content: String, targetPeer: PeerID?) -> BitchatMessage {
         let timestamp = Date()
         let message: BitchatMessage
 
@@ -2539,7 +2597,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
                 deliveryStatus: .sending
             )
             var chats = privateChats
-            chats[PeerID(str: peerID), default: []].append(message)
+            chats[peerID, default: []].append(message)
             privateChats = chats
             trimMessagesIfNeeded()
         } else {
@@ -2552,7 +2610,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
                 originalSender: nil,
                 isPrivate: false,
                 recipientNickname: nil,
-                senderPeerID: PeerID(str: senderPeerID),
+                senderPeerID: senderPeerID,
                 deliveryStatus: .sending
             )
             messages.append(message)
@@ -2577,29 +2635,28 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         return message
     }
 
-    private func currentPublicSender() -> (name: String, peerID: String) {
+    private func currentPublicSender() -> (name: String, peerID: PeerID) {
         var displaySender = nickname
         var senderPeerID = meshService.myPeerID
         if case .location(let ch) = activeChannel,
            let identity = try? idBridge.deriveIdentity(forGeohash: ch.geohash) {
             let suffix = String(identity.publicKeyHex.suffix(4))
             displaySender = nickname + "#" + suffix
-            let shortKey = identity.publicKeyHex.prefix(TransportConfig.nostrShortKeyDisplayLength)
+            senderPeerID = PeerID(nostr: identity.publicKeyHex)
-            senderPeerID = PeerID(str: "nostr:\(shortKey)")
         }
-        return (displaySender, senderPeerID.id)
+        return (displaySender, senderPeerID)
     }
 
     @MainActor
-    private func nicknameForPeer(_ peerID: String) -> String {
+    private func nicknameForPeer(_ peerID: PeerID) -> String {
-        if let name = meshService.peerNickname(peerID: PeerID(str: peerID)) {
+        if let name = meshService.peerNickname(peerID: peerID) {
             return name
         }
-        if let favorite = FavoritesPersistenceService.shared.getFavoriteStatus(forPeerID: PeerID(str: peerID)),
+        if let favorite = FavoritesPersistenceService.shared.getFavoriteStatus(forPeerID: peerID),
            !favorite.peerNickname.isEmpty {
             return favorite.peerNickname
         }
-        if let noiseKey = Data(hexString: peerID),
+        if let noiseKey = Data(hexString: peerID.id),
            let favorite = FavoritesPersistenceService.shared.getFavoriteStatus(for: noiseKey),
            !favorite.peerNickname.isEmpty {
             return favorite.peerNickname
@@ -3288,7 +3345,10 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             // In public chat - send to active public channel
             switch activeChannel {
             case .mesh:
-                meshService.sendMessage(screenshotMessage, mentions: [])
+                meshService.sendMessage(screenshotMessage,
+                                        mentions: [],
+                                        messageID: UUID().uuidString,
+                                        timestamp: Date())
             case .location(let ch):
                 Task { @MainActor in
                     do {
@@ -3442,7 +3502,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
                     if !sentReadReceipts.contains(message.id) {
                         // Use stable Noise key hex if available; else fall back to peerID
                         let recipPeer = peerID.isHex ? peerID : (unifiedPeerService.getPeer(by: peerID)?.peerID ?? peerID)
-                        let receipt = ReadReceipt(originalMessageID: message.id, readerID: meshService.myPeerID.id, readerNickname: nickname)
+                        let receipt = ReadReceipt(originalMessageID: message.id, readerID: meshService.myPeerID, readerNickname: nickname)
                         messageRouter.sendReadReceipt(receipt, to: recipPeer)
                         sentReadReceipts.insert(message.id)
                     }
@@ -4056,7 +4116,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             if let spid = message.senderPeerID {
                 if case .location(let ch) = activeChannel, spid.id.hasPrefix("nostr:") {
                     if let myGeo = try? idBridge.deriveIdentity(forGeohash: ch.geohash) {
-                        return spid == "nostr:\(myGeo.publicKeyHex.prefix(TransportConfig.nostrShortKeyDisplayLength))"
+                        return spid == PeerID(nostr: myGeo.publicKeyHex)
                     }
                 }
                 return spid == meshService.myPeerID
@@ -4209,13 +4269,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         let noiseService = meshService.getNoiseService()
         
         if noiseService.hasEstablishedSession(with: peerID) {
-            // Check if fingerprint is verified using our persisted data
+            peerEncryptionStatus[peerID] = encryptionStatus(for: peerID)
-            if let fingerprint = getFingerprint(for: peerID),
-               verifiedFingerprints.contains(fingerprint) {
-                peerEncryptionStatus[peerID] = .noiseVerified
-            } else {
-                peerEncryptionStatus[peerID] = .noiseSecured
-            }
         } else if noiseService.hasSession(with: peerID) {
             // Session exists but not established - handshaking
             peerEncryptionStatus[peerID] = .noiseHandshaking
@@ -4250,27 +4304,12 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         // Determine status based on session state
         switch sessionState {
         case .established:
-            // We have encryption, now check if it's verified
+            status = encryptionStatus(for: peerID)
-            if let fingerprint = getFingerprint(for: peerID) {
-                if verifiedFingerprints.contains(fingerprint) {
-                    status = .noiseVerified
-                } else {
-                    status = .noiseSecured
-                }
-            } else {
-                // We have a session but no fingerprint yet - still secured
-                status = .noiseSecured
-            }
         case .handshaking, .handshakeQueued:
             // If we've ever established a session, show secured instead of handshaking
             if hasEverEstablishedSession {
                 // Check if it was verified before
-                if let fingerprint = getFingerprint(for: peerID),
+                status = encryptionStatus(for: peerID)
-                   verifiedFingerprints.contains(fingerprint) {
-                    status = .noiseVerified
-                } else {
-                    status = .noiseSecured
-                }
             } else {
                 // First time establishing - show handshaking
                 status = .noiseHandshaking
@@ -4279,12 +4318,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             // If we've ever established a session, show secured instead of no handshake
             if hasEverEstablishedSession {
                 // Check if it was verified before
-                if let fingerprint = getFingerprint(for: peerID),
+                status = encryptionStatus(for: peerID)
-                   verifiedFingerprints.contains(fingerprint) {
-                    status = .noiseVerified
-                } else {
-                    status = .noiseSecured
-                }
             } else {
                 // Never established - show no handshake
                 status = .noHandshake
@@ -4293,12 +4327,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             // If we've ever established a session, show secured instead of failed
             if hasEverEstablishedSession {
                 // Check if it was verified before
-                if let fingerprint = getFingerprint(for: peerID),
+                status = encryptionStatus(for: peerID)
-                   verifiedFingerprints.contains(fingerprint) {
-                    status = .noiseVerified
-                } else {
-                    status = .noiseSecured
-                }
             } else {
                 // Never established - show failed
                 status = .none
@@ -4372,7 +4401,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
 
     @MainActor
     private func meshSeed(for peerID: PeerID) -> String {
-        if let full = getNoiseKeyForShortID(peerID)?.lowercased() {
+        if let full = getNoiseKeyForShortID(peerID)?.id.lowercased() {
             return "noise:" + full
         }
         return peerID.id.lowercased()
@@ -4689,16 +4718,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         let noiseService = meshService.getNoiseService()
         
         if noiseService.hasEstablishedSession(with: peerID) {
-            if let fingerprint = getFingerprint(for: peerID) {
+            peerEncryptionStatus[peerID] = encryptionStatus(for: peerID)
-                if verifiedFingerprints.contains(fingerprint) {
-                    peerEncryptionStatus[peerID] = .noiseVerified
-                } else {
-                    peerEncryptionStatus[peerID] = .noiseSecured
-                }
-            } else {
-                // Session established but no fingerprint yet
-                peerEncryptionStatus[peerID] = .noiseSecured
-            }
         } else if noiseService.hasSession(with: peerID) {
             peerEncryptionStatus[peerID] = .noiseHandshaking
         } else {
@@ -4728,6 +4748,16 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         return unifiedPeerService.getFingerprint(for: peerID)
     }
     
+    /// Check if fingerprint is verified using our persisted data
+    @MainActor
+    private func encryptionStatus(for peerID: PeerID) -> EncryptionStatus {
+        if let fp = getFingerprint(for: peerID), verifiedFingerprints.contains(fp) {
+            return .noiseVerified
+        } else {
+            return .noiseSecured
+        }
+    }
+    
     /// Helper to resolve nickname for a peer ID through various sources
     @MainActor
     private func resolveNickname(for peerID: PeerID) -> String {
@@ -4829,7 +4859,6 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         noiseService.onPeerAuthenticated = { [weak self] peerID, fingerprint in
             DispatchQueue.main.async {
                 guard let self = self else { return }
-                let peerID = PeerID(str: peerID)
 
                 SecureLogger.debug("🔐 Authenticated: \(peerID)", category: .security)
 
@@ -4848,9 +4877,9 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
                 // Cache shortID -> full Noise key mapping as soon as session authenticates
                 if self.shortIDToNoiseKey[peerID] == nil,
                    let keyData = self.meshService.getNoiseService().getPeerPublicKeyData(peerID) {
-                    let stable = keyData.hexEncodedString()
+                    let stable = PeerID(hexData: keyData)
                     self.shortIDToNoiseKey[peerID] = stable
-                    SecureLogger.debug("🗺️ Mapped short peerID to Noise key for header continuity: \(peerID) -> \(stable.prefix(8))…", category: .session)
+                    SecureLogger.debug("🗺️ Mapped short peerID to Noise key for header continuity: \(peerID) -> \(stable.id.prefix(8))…", category: .session)
                 }
 
                 // If a QR verification is pending but not sent yet, send it now that session is authenticated
@@ -5034,12 +5063,12 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         }
     }
 
-    func didReceivePublicMessage(from peerID: PeerID, nickname: String, content: String, timestamp: Date) {
+    func didReceivePublicMessage(from peerID: PeerID, nickname: String, content: String, timestamp: Date, messageID: String?) {
         Task { @MainActor in
             let normalized = content.trimmingCharacters(in: .whitespacesAndNewlines)
             let publicMentions = parseMentions(from: normalized)
             let msg = BitchatMessage(
-                id: UUID().uuidString,
+                id: messageID,
                 sender: nickname,
                 content: normalized,
                 timestamp: timestamp,
@@ -5115,7 +5144,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
 
             // Cache mapping to full Noise key for session continuity on disconnect
             if let peer = unifiedPeerService.getPeer(by: peerID) {
-                let noiseKeyHex = peer.noisePublicKey.hexEncodedString()
+                let noiseKeyHex = PeerID(hexData: peer.noisePublicKey)
                 shortIDToNoiseKey[peerID] = noiseKeyHex
             }
 
@@ -5131,15 +5160,14 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         identityManager.removeEphemeralSession(peerID: peerID)
 
         // If the open PM is tied to this short peer ID, switch UI context to the full Noise key (offline favorite)
-        var derivedStableKeyHex: String? = shortIDToNoiseKey[peerID]
+        var derivedStableKeyHex = shortIDToNoiseKey[peerID]
         if derivedStableKeyHex == nil,
            let key = meshService.getNoiseService().getPeerPublicKeyData(peerID) {
-            derivedStableKeyHex = key.hexEncodedString()
+            derivedStableKeyHex = PeerID(hexData: key)
             shortIDToNoiseKey[peerID] = derivedStableKeyHex
         }
 
-        if let current = selectedPrivateChatPeer, current == peerID,
+        if let current = selectedPrivateChatPeer, current == peerID, let stableKeyHex = derivedStableKeyHex {
-           let stableKeyHex = PeerID(str: derivedStableKeyHex) {
             // Migrate messages view context to stable key so header shows favorite + Nostr globe
             if let messages = privateChats[peerID] {
                 if privateChats[stableKeyHex] == nil { privateChats[stableKeyHex] = [] }
@@ -5201,34 +5229,29 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             self.cleanupStaleUnreadPeerIDs()
             
             // Smart notification logic for "bitchatters nearby"
-            if !peers.isEmpty {
+            let meshPeers = peers.filter { peerID in
-                // Cancel any pending reset if peers are back
+                self.meshService.isPeerConnected(peerID) || self.meshService.isPeerReachable(peerID)
-                self.networkResetTimer?.invalidate()
+            }
-                self.networkResetTimer = nil
+            let meshPeerSet = Set(meshPeers)
-                // Count mesh peers that are connected OR recently reachable via mesh relays
+            
-                let meshPeers = peers.filter { peerID in
+            if meshPeerSet.isEmpty {
-                    self.meshService.isPeerConnected(peerID) || self.meshService.isPeerReachable(peerID)
+                self.scheduleNetworkEmptyTimer()
-                }
-                
-                // Rising-edge only: previously zero peers, now > 0 peers
-                let currentPeerSet = Set(meshPeers)
-                let hadNone = self.recentlySeenPeers.isEmpty
-                if meshPeers.count > 0 && hadNone && !self.hasNotifiedNetworkAvailable {
-                    self.hasNotifiedNetworkAvailable = true
-                    self.lastNetworkNotificationTime = Date()
-                    self.recentlySeenPeers = currentPeerSet
-                    NotificationService.shared.sendNetworkAvailableNotification(peerCount: meshPeers.count)
-                    SecureLogger.info("👥 Sent bitchatters nearby notification for \(meshPeers.count) mesh peers", category: .session)
-                }
             } else {
-                // No peers — immediately reset to allow next rising-edge to notify
+                self.invalidateNetworkEmptyTimer()
-                self.hasNotifiedNetworkAvailable = false
+                // Trim out peers we no longer observe before comparing for new arrivals
-                self.recentlySeenPeers.removeAll()
+                self.recentlySeenPeers.formIntersection(meshPeerSet)
-                if self.networkResetTimer != nil {
+                let newPeers = meshPeerSet.subtracting(self.recentlySeenPeers)
-                    self.networkResetTimer?.invalidate()
+                
-                    self.networkResetTimer = nil
+                if !newPeers.isEmpty {
+                    self.lastNetworkNotificationTime = Date()
+                    self.recentlySeenPeers.formUnion(newPeers)
+                    NotificationService.shared.sendNetworkAvailableNotification(peerCount: meshPeers.count)
+                    SecureLogger.info(
+                        "👥 Sent bitchatters nearby notification for \(meshPeers.count) mesh peers (new: \(newPeers.count))",
+                        category: .session
+                    )
+                    self.scheduleNetworkResetTimer()
                 }
-                SecureLogger.debug("⏳ Mesh empty — reset network notification state", category: .session)
             }
             
             // Register ephemeral sessions for all connected peers
@@ -5298,6 +5321,71 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         // Keep only receipts from messages we still have
         cleanupOldReadReceipts()
     }
+
+    @MainActor
+    private func scheduleNetworkResetTimer() {
+        networkResetTimer?.invalidate()
+        networkResetTimer = Timer.scheduledTimer(
+            timeInterval: networkResetGraceSeconds,
+            target: self,
+            selector: #selector(onNetworkResetTimerFired(_:)),
+            userInfo: nil,
+            repeats: false
+        )
+    }
+
+    @MainActor
+    @objc private func onNetworkResetTimerFired(_ timer: Timer) {
+        let activeMeshPeers = meshService
+            .currentPeerSnapshots()
+            .filter { snapshot in
+                snapshot.isConnected || meshService.isPeerReachable(snapshot.peerID)
+            }
+        if activeMeshPeers.isEmpty {
+            recentlySeenPeers.removeAll()
+            SecureLogger.debug("⏱️ Network notification window reset after quiet period", category: .session)
+        } else {
+            SecureLogger.debug("⏱️ Skipped network notification reset; still seeing \(activeMeshPeers.count) mesh peers", category: .session)
+        }
+        networkResetTimer = nil
+    }
+
+    @MainActor
+    private func scheduleNetworkEmptyTimer() {
+        guard networkEmptyTimer == nil else { return }
+        networkEmptyTimer = Timer.scheduledTimer(
+            timeInterval: TransportConfig.uiMeshEmptyConfirmationSeconds,
+            target: self,
+            selector: #selector(onNetworkEmptyTimerFired(_:)),
+            userInfo: nil,
+            repeats: false
+        )
+        SecureLogger.debug("⏳ Mesh empty — waiting before resetting notification state", category: .session)
+    }
+
+    @MainActor
+    private func invalidateNetworkEmptyTimer() {
+        if networkEmptyTimer != nil {
+            networkEmptyTimer?.invalidate()
+            networkEmptyTimer = nil
+        }
+    }
+
+    @MainActor
+    @objc private func onNetworkEmptyTimerFired(_ timer: Timer) {
+        let activeMeshPeers = meshService
+            .currentPeerSnapshots()
+            .filter { snapshot in
+                snapshot.isConnected || meshService.isPeerReachable(snapshot.peerID)
+            }
+        if activeMeshPeers.isEmpty {
+            recentlySeenPeers.removeAll()
+            SecureLogger.debug("⏳ Mesh empty — notification state reset after confirmation", category: .session)
+        } else {
+            SecureLogger.debug("⏳ Mesh empty timer cancelled; \(activeMeshPeers.count) mesh peers detected again", category: .session)
+        }
+        networkEmptyTimer = nil
+    }
     
     private func cleanupOldReadReceipts() {
         // Skip cleanup during startup phase or if privateChats is empty
@@ -5454,6 +5542,9 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         )
         // Append to current visible messages
         messages.append(systemMessage)
+        // Track the content key so relayed copies of the same system-style message are ignored
+        let contentKey = normalizedContentKey(systemMessage.content)
+        recordContentKey(contentKey, timestamp: systemMessage.timestamp)
         // Persist into the backing store for the active channel to survive rebinds
         switch activeChannel {
         case .mesh:
@@ -5504,7 +5595,10 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             return
         }
         // Default: send over mesh
-        meshService.sendMessage(content, mentions: [])
+        meshService.sendMessage(content,
+                                mentions: [],
+                                messageID: UUID().uuidString,
+                                timestamp: Date())
     }
     
     // MARK: - Simplified Nostr Integration (Inlined from MessageRouter)
@@ -5578,7 +5672,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             }
 
             // Validate recipient
-            if let rid = packet.recipientID, rid.hexEncodedString() != meshService.myPeerID {
+            if PeerID(hexData: packet.recipientID) != meshService.myPeerID {
                 return
             }
 
@@ -5788,7 +5882,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         }
         if !sentReadReceipts.contains(message.id) {
             if let key {
-                let receipt = ReadReceipt(originalMessageID: message.id, readerID: meshService.myPeerID.id, readerNickname: nickname)
+                let receipt = ReadReceipt(originalMessageID: message.id, readerID: meshService.myPeerID, readerNickname: nickname)
                 SecureLogger.debug("Viewing chat; sending READ ack for \(message.id.prefix(8))… via router", category: .session)
                 messageRouter.sendReadReceipt(receipt, to: PeerID(hexData: key))
                 sentReadReceipts.insert(message.id)
@@ -5823,7 +5917,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             NotificationService.shared.sendPrivateMessageNotification(
                 from: senderNickname,
                 message: messageContent,
-                peerID: targetPeerID.id
+                peerID: targetPeerID
             )
         }
     }
@@ -6216,7 +6310,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
                 NotificationService.shared.sendPrivateMessageNotification(
                     from: message.sender,
                     message: message.content,
-                    peerID: peerID.id
+                    peerID: peerID
                 )
             }
         } else {
@@ -6231,7 +6325,7 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
             if !sentReadReceipts.contains(message.id) {
                 let receipt = ReadReceipt(
                     originalMessageID: message.id,
-                    readerID: meshService.myPeerID.id,
+                    readerID: meshService.myPeerID,
                     readerNickname: nickname
                 )
                 
@@ -6270,7 +6364,9 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
         let isGeo = finalMessage.senderPeerID?.isGeoChat == true
 
         // Apply per-sender and per-content rate limits (drop if exceeded)
-        if finalMessage.sender != "system" {
+        // Treat action-style system messages (which carry a senderPeerID) the same as regular user messages
+        let shouldRateLimit = finalMessage.sender != "system" || finalMessage.senderPeerID != nil
+        if shouldRateLimit {
             let senderKey = normalizedSenderKey(for: finalMessage)
             let contentKey = normalizedContentKey(finalMessage.content)
             let now = Date()
@@ -6288,8 +6384,10 @@ final class ChatViewModel: ObservableObject, BitchatDelegate {
 
         // Persist mesh messages to mesh timeline always
         if !isGeo && finalMessage.sender != "system" {
-            meshTimeline.append(finalMessage)
+            if !meshTimeline.contains(where: { $0.id == finalMessage.id }) {
-            trimMeshTimelineIfNeeded()
+                meshTimeline.append(finalMessage)
+                trimMeshTimelineIfNeeded()
+            }
         }
 
         // Persist geochat messages to per-geohash timeline

bitchat/Views/ContentView.swift

@@ -47,7 +47,7 @@ struct ContentView: View {
     @State private var commandSuggestions: [String] = []
     @State private var showMessageActions = false
     @State private var selectedMessageSender: String?
-    @State private var selectedMessageSenderID: String?
+    @State private var selectedMessageSenderID: PeerID?
     @FocusState private var isNicknameFieldFocused: Bool
     @State private var isAtBottomPublic: Bool = true
     @State private var isAtBottomPrivate: Bool = true
@@ -80,7 +80,7 @@ struct ContentView: View {
     // Timer-based refresh removed; use LocationChannelManager live updates instead
     // Window sizes for rendering (infinite scroll up)
     @State private var windowCountPublic: Int = 300
-    @State private var windowCountPrivate: [String: Int] = [:]
+    @State private var windowCountPrivate: [PeerID: Int] = [:]
     
     // MARK: - Computed Properties
     
@@ -124,7 +124,7 @@ struct ContentView: View {
     
     
     private struct PrivateHeaderContext {
-        let headerPeerID: String
+        let headerPeerID: PeerID
         let peer: BitchatPeer?
         let displayName: String
         let isNostrAvailable: Bool
@@ -188,10 +188,6 @@ struct ContentView: View {
             )
         ) {
             peopleSheetView
-                #if os(iOS)
-                .presentationDetents([.large])
-                .presentationDragIndicator(.visible)
-                #endif
         }
         .sheet(isPresented: $showAppInfo) {
             AppInfoView()
@@ -203,11 +199,19 @@ struct ContentView: View {
             set: { _ in viewModel.showingFingerprintFor = nil }
         )) {
             if let peerID = viewModel.showingFingerprintFor {
-                FingerprintView(viewModel: viewModel, peerID: peerID.id)
+                FingerprintView(viewModel: viewModel, peerID: peerID)
             }
         }
 #if os(iOS)
-        .sheet(isPresented: $showImagePicker) {
+        // Only present image picker from main view when NOT in a sheet
+        .fullScreenCover(isPresented: Binding(
+            get: { showImagePicker && !showSidebar && viewModel.selectedPrivateChatPeer == nil },
+            set: { newValue in
+                if !newValue {
+                    showImagePicker = false
+                }
+            }
+        )) {
             ImagePickerView(sourceType: imagePickerSourceType) { image in
                 showImagePicker = false
                 if let image = image {
@@ -223,13 +227,19 @@ struct ContentView: View {
                     }
                 }
             }
-            .presentationDetents([.large])
-            .presentationDragIndicator(.hidden)
             .ignoresSafeArea()
         }
 #endif
 #if os(macOS)
-        .sheet(isPresented: $showMacImagePicker) {
+        // Only present Mac image picker from main view when NOT in a sheet
+        .sheet(isPresented: Binding(
+            get: { showMacImagePicker && !showSidebar && viewModel.selectedPrivateChatPeer == nil },
+            set: { newValue in
+                if !newValue {
+                    showMacImagePicker = false
+                }
+            }
+        )) {
             MacImagePickerView { url in
                 showMacImagePicker = false
                 if let url = url {
@@ -275,12 +285,12 @@ struct ContentView: View {
 
             Button("content.actions.direct_message") {
                 if let peerID = selectedMessageSenderID {
-                    if peerID.hasPrefix("nostr:") {
+                    if peerID.isGeoChat {
-                        if let full = viewModel.fullNostrHex(forSenderPeerID: PeerID(str: peerID)) {
+                        if let full = viewModel.fullNostrHex(forSenderPeerID: peerID) {
                             viewModel.startGeohashDM(withPubkeyHex: full)
                         }
                     } else {
-                        viewModel.startPrivateChat(with: PeerID(str: peerID))
+                        viewModel.startPrivateChat(with: peerID)
                     }
                     withAnimation(.easeInOut(duration: TransportConfig.uiAnimationMediumSeconds)) {
                         showSidebar = true
@@ -302,8 +312,8 @@ struct ContentView: View {
 
             Button("content.actions.block", role: .destructive) {
                 // Prefer direct geohash block when we have a Nostr sender ID
-                if let peerID = selectedMessageSenderID, peerID.hasPrefix("nostr:"),
+                if let peerID = selectedMessageSenderID, peerID.isGeoChat,
-                   let full = viewModel.fullNostrHex(forSenderPeerID: PeerID(str: peerID)),
+                   let full = viewModel.fullNostrHex(forSenderPeerID: peerID),
                    let sender = selectedMessageSender {
                     viewModel.blockGeohashUser(pubkeyHexLowercased: full, displayName: sender)
                 } else if let sender = selectedMessageSender {
@@ -334,9 +344,9 @@ struct ContentView: View {
     
     // MARK: - Message List View
     
-    private func messagesView(privatePeer: String?, isAtBottom: Binding<Bool>) -> some View {
+    private func messagesView(privatePeer: PeerID?, isAtBottom: Binding<Bool>) -> some View {
         let messages: [BitchatMessage] = {
-            if let peerID = PeerID(str: privatePeer) {
+            if let peerID = privatePeer {
                 return viewModel.getPrivateChatMessages(for: peerID)
             }
             return viewModel.messages
@@ -476,7 +486,7 @@ struct ContentView: View {
             }
             .onChange(of: viewModel.privateChats) { _ in
                 if let peerID = privatePeer,
-                   let messages = viewModel.privateChats[PeerID(str: peerID)],
+                   let messages = viewModel.privateChats[peerID],
                    !messages.isEmpty {
                     // If the newest private message is from me, always scroll
                     let lastMsg = messages.last!
@@ -531,7 +541,7 @@ struct ContentView: View {
             }
             .onAppear {
                 // Also check when view appears
-                if let peerID = PeerID(str: privatePeer) {
+                if let peerID = privatePeer {
                     // Try multiple times to ensure read receipts are sent
                     viewModel.markPrivateMessagesAsRead(from: peerID)
                     
@@ -784,7 +794,7 @@ struct ContentView: View {
         case "user":
             let id = url.path.trimmingCharacters(in: CharacterSet(charactersIn: "/"))
             let peerID = PeerID(str: id.removingPercentEncoding ?? id)
-            selectedMessageSenderID = peerID.id
+            selectedMessageSenderID = peerID
 
             if peerID.isGeoDM || peerID.isGeoChat {
                 selectedMessageSender = viewModel.geohashDisplayName(for: peerID)
@@ -832,10 +842,10 @@ struct ContentView: View {
     }
 
     private func scrollToBottom(on proxy: ScrollViewProxy,
-                                privatePeer: String?,
+                                privatePeer: PeerID?,
                                 isAtBottom: Binding<Bool>) {
         let targetID: String? = {
-            if let peer = PeerID(str: privatePeer),
+            if let peer = privatePeer,
                let last = viewModel.getPrivateChatMessages(for: peer).suffix(300).last?.id {
                 return "dm:\(peer)|\(last)"
             }
@@ -861,7 +871,7 @@ struct ContentView: View {
 
         DispatchQueue.main.asyncAfter(deadline: .now() + 0.05) {
             let secondTarget: String? = {
-                if let peer = PeerID(str: privatePeer),
+                if let peer = privatePeer,
                    let last = viewModel.getPrivateChatMessages(for: peer).suffix(300).last?.id {
                     return "dm:\(peer)|\(last)"
                 }
@@ -912,6 +922,53 @@ struct ContentView: View {
         #if os(macOS)
         .frame(minWidth: 420, minHeight: 520)
         #endif
+        // Present image picker from sheet context when IN a sheet (parent-child pattern)
+        #if os(iOS)
+        .fullScreenCover(isPresented: Binding(
+            get: { showImagePicker && (showSidebar || viewModel.selectedPrivateChatPeer != nil) },
+            set: { newValue in
+                if !newValue {
+                    showImagePicker = false
+                }
+            }
+        )) {
+            ImagePickerView(sourceType: imagePickerSourceType) { image in
+                showImagePicker = false
+                if let image = image {
+                    Task {
+                        do {
+                            let processedURL = try ImageUtils.processImage(image)
+                            await MainActor.run {
+                                viewModel.sendImage(from: processedURL)
+                            }
+                        } catch {
+                            SecureLogger.error("Image processing failed: \(error)", category: .session)
+                        }
+                    }
+                }
+            }
+            .ignoresSafeArea()
+        }
+        #endif
+        #if os(macOS)
+        .sheet(isPresented: $showMacImagePicker) {
+            MacImagePickerView { url in
+                showMacImagePicker = false
+                if let url = url {
+                    Task {
+                        do {
+                            let processedURL = try ImageUtils.processImage(at: url)
+                            await MainActor.run {
+                                viewModel.sendImage(from: processedURL)
+                            }
+                        } catch {
+                            SecureLogger.error("Image processing failed: \(error)", category: .session)
+                        }
+                    }
+                }
+            }
+        }
+        #endif
     }
     
     // MARK: - People Sheet Views
@@ -998,14 +1055,14 @@ struct ContentView: View {
                             textColor: textColor,
                             secondaryTextColor: secondaryTextColor,
                             onTapPeer: { peerID in
-                                viewModel.startPrivateChat(with: PeerID(str: peerID))
+                                viewModel.startPrivateChat(with: peerID)
                                 showSidebar = true
                             },
                             onToggleFavorite: { peerID in
-                                viewModel.toggleFavorite(peerID: PeerID(str: peerID))
+                                viewModel.toggleFavorite(peerID: peerID)
                             },
                             onShowFingerprint: { peerID in
-                                viewModel.showFingerprint(for: PeerID(str: peerID))
+                                viewModel.showFingerprint(for: peerID)
                             }
                         )
                     }
@@ -1020,7 +1077,7 @@ struct ContentView: View {
 
     private var privateChatSheetView: some View {
         VStack(spacing: 0) {
-            if let privatePeerID = viewModel.selectedPrivateChatPeer?.id {
+            if let privatePeerID = viewModel.selectedPrivateChatPeer {
                 let headerContext = makePrivateHeaderContext(for: privatePeerID)
 
                 HStack(spacing: 12) {
@@ -1044,12 +1101,11 @@ struct ContentView: View {
 
                     HStack(spacing: 8) {
                         privateHeaderInfo(context: headerContext, privatePeerID: privatePeerID)
-                        let peerID = PeerID(str: headerContext.headerPeerID)
+                        let isFavorite = viewModel.isFavorite(peerID: headerContext.headerPeerID)
-                        let isFavorite = viewModel.isFavorite(peerID: peerID)
 
-                        if !privatePeerID.hasPrefix("nostr_") {
+                        if !privatePeerID.isGeoDM {
                             Button(action: {
-                                viewModel.toggleFavorite(peerID: peerID)
+                                viewModel.toggleFavorite(peerID: headerContext.headerPeerID)
                             }) {
                                 Image(systemName: isFavorite ? "star.fill" : "star")
                                     .font(.bitchatSystem(size: 14))
@@ -1088,7 +1144,7 @@ struct ContentView: View {
                 .background(backgroundColor)
             }
 
-            messagesView(privatePeer: viewModel.selectedPrivateChatPeer?.id, isAtBottom: $isAtBottomPrivate)
+            messagesView(privatePeer: viewModel.selectedPrivateChatPeer, isAtBottom: $isAtBottomPrivate)
                 .background(backgroundColor)
                 .frame(maxWidth: .infinity, maxHeight: .infinity)
             Divider()
@@ -1110,9 +1166,9 @@ struct ContentView: View {
         )
     }
 
-    private func privateHeaderInfo(context: PrivateHeaderContext, privatePeerID: String) -> some View {
+    private func privateHeaderInfo(context: PrivateHeaderContext, privatePeerID: PeerID) -> some View {
         Button(action: {
-            viewModel.showFingerprint(for: PeerID(str: context.headerPeerID))
+            viewModel.showFingerprint(for: context.headerPeerID)
         }) {
             HStack(spacing: 6) {
                 if let connectionState = context.peer?.connectionState {
@@ -1135,7 +1191,7 @@ struct ContentView: View {
                     case .offline:
                         EmptyView()
                     }
-                } else if viewModel.meshService.isPeerReachable(PeerID(str: context.headerPeerID)) {
+                } else if viewModel.meshService.isPeerReachable(context.headerPeerID) {
                     Image(systemName: "point.3.filled.connected.trianglepath.dotted")
                         .font(.bitchatSystem(size: 14))
                         .foregroundColor(textColor)
@@ -1145,7 +1201,7 @@ struct ContentView: View {
                         .font(.bitchatSystem(size: 14))
                         .foregroundColor(.purple)
                         .accessibilityLabel(String(localized: "content.accessibility.available_nostr", comment: "Accessibility label for Nostr-available peer indicator"))
-                } else if viewModel.meshService.isPeerConnected(PeerID(str: context.headerPeerID)) || viewModel.connectedPeers.contains(PeerID(str: context.headerPeerID)) {
+                } else if viewModel.meshService.isPeerConnected(context.headerPeerID) || viewModel.connectedPeers.contains(context.headerPeerID) {
                     Image(systemName: "dot.radiowaves.left.and.right")
                         .font(.bitchatSystem(size: 14))
                         .foregroundColor(textColor)
@@ -1156,14 +1212,9 @@ struct ContentView: View {
                     .font(.bitchatSystem(size: 16, weight: .medium, design: .monospaced))
                     .foregroundColor(textColor)
 
-                if !privatePeerID.hasPrefix("nostr_") {
+                if !privatePeerID.isGeoDM {
-                    let statusPeerID: String = {
+                    let statusPeerID = viewModel.getShortIDForNoiseKey(privatePeerID)
-                        if privatePeerID.count == 64, let short = viewModel.getShortIDForNoiseKey(privatePeerID) {
+                    let encryptionStatus = viewModel.getEncryptionStatus(for: statusPeerID)
-                            return short.id
-                        }
-                        return context.headerPeerID
-                    }()
-                    let encryptionStatus = viewModel.getEncryptionStatus(for: PeerID(str: statusPeerID))
                     if let icon = encryptionStatus.icon {
                         Image(systemName: icon)
                             .font(.bitchatSystem(size: 14))
@@ -1195,33 +1246,27 @@ struct ContentView: View {
         .frame(height: headerHeight)
     }
 
-    private func makePrivateHeaderContext(for privatePeerID: String) -> PrivateHeaderContext {
+    private func makePrivateHeaderContext(for privatePeerID: PeerID) -> PrivateHeaderContext {
-        let headerPeerID: String = {
+        let headerPeerID = viewModel.getShortIDForNoiseKey(privatePeerID)
-            if privatePeerID.count == 64, let short = viewModel.getShortIDForNoiseKey(privatePeerID) {
+        let peer = viewModel.getPeer(byID: headerPeerID)
-                return short.id
-            }
-            return privatePeerID
-        }()
-
-        let peer = viewModel.getPeer(byID: PeerID(str: headerPeerID))
 
         let displayName: String = {
-            if privatePeerID.hasPrefix("nostr_"), case .location(let ch) = locationManager.selectedChannel {
+            if privatePeerID.isGeoDM, case .location(let ch) = locationManager.selectedChannel {
-                let disp = viewModel.geohashDisplayName(for: PeerID(str: privatePeerID))
+                let disp = viewModel.geohashDisplayName(for: privatePeerID)
                 return "#\(ch.geohash)/@\(disp)"
             }
             if let name = peer?.displayName { return name }
-            if let name = viewModel.meshService.peerNickname(peerID: PeerID(str: headerPeerID)) { return name }
+            if let name = viewModel.meshService.peerNickname(peerID: headerPeerID) { return name }
-            if let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: Data(hexString: headerPeerID) ?? Data()),
+            if let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: Data(hexString: headerPeerID.id) ?? Data()),
                !fav.peerNickname.isEmpty { return fav.peerNickname }
-            if headerPeerID.count == 16 {
+            if headerPeerID.id.count == 16 {
-                let candidates = viewModel.identityManager.getCryptoIdentitiesByPeerIDPrefix(PeerID(str: headerPeerID))
+                let candidates = viewModel.identityManager.getCryptoIdentitiesByPeerIDPrefix(headerPeerID)
                 if let id = candidates.first,
                    let social = viewModel.identityManager.getSocialIdentity(for: id.fingerprint) {
                     if let pet = social.localPetname, !pet.isEmpty { return pet }
                     if !social.claimedNickname.isEmpty { return social.claimedNickname }
                 }
-            } else if headerPeerID.count == 64, let keyData = Data(hexString: headerPeerID) {
+            } else if let keyData = headerPeerID.noiseKey {
                 let fp = keyData.sha256Fingerprint()
                 if let social = viewModel.identityManager.getSocialIdentity(for: fp) {
                     if let pet = social.localPetname, !pet.isEmpty { return pet }
@@ -1233,7 +1278,7 @@ struct ContentView: View {
 
         let isNostrAvailable: Bool = {
             guard let connectionState = peer?.connectionState else {
-                if let noiseKey = Data(hexString: headerPeerID),
+                if let noiseKey = Data(hexString: headerPeerID.id),
                    let favoriteStatus = FavoritesPersistenceService.shared.getFavoriteStatus(for: noiseKey),
                    favoriteStatus.isMutual {
                     return true
@@ -1752,7 +1797,7 @@ private extension ContentView {
 
     private func expandWindow(ifNeededFor message: BitchatMessage,
                               allMessages: [BitchatMessage],
-                              privatePeer: String?,
+                              privatePeer: PeerID?,
                               proxy: ScrollViewProxy) {
         let step = TransportConfig.uiWindowStepCount
         let contextKey: String = {
@@ -1812,7 +1857,19 @@ private extension ContentView {
     }
 
     private var shouldShowMediaControls: Bool {
-        if viewModel.selectedPrivateChatPeer != nil {
+        if let peer = viewModel.selectedPrivateChatPeer, !(peer.isGeoDM || peer.isGeoChat) {
+            return true
+        }
+        switch locationManager.selectedChannel {
+        case .mesh:
+            return true
+        case .location:
+            return false
+        }
+    }
+
+    private var shouldShowVoiceControl: Bool {
+        if let peer = viewModel.selectedPrivateChatPeer, !(peer.isGeoDM || peer.isGeoChat) {
             return true
         }
         switch locationManager.selectedChannel {
@@ -1857,17 +1914,23 @@ private extension ContentView {
         #endif
     }
 
+    @ViewBuilder
     var sendOrMicButton: some View {
         let hasText = !trimmedMessageText.isEmpty
-        return ZStack {
+        if shouldShowVoiceControl {
-            micButtonView
+            ZStack {
-                .opacity(hasText ? 0 : 1)
+                micButtonView
-                .allowsHitTesting(!hasText)
+                    .opacity(hasText ? 0 : 1)
+                    .allowsHitTesting(!hasText)
+                sendButtonView(enabled: hasText)
+                    .opacity(hasText ? 1 : 0)
+                    .allowsHitTesting(hasText)
+            }
+            .frame(width: 36, height: 36)
+        } else {
             sendButtonView(enabled: hasText)
-                .opacity(hasText ? 1 : 0)
+                .frame(width: 36, height: 36)
-                .allowsHitTesting(hasText)
         }
-        .frame(width: 36, height: 36)
     }
 
     private var micButtonView: some View {
@@ -1920,6 +1983,7 @@ private extension ContentView {
     }
 
     func startVoiceRecording() {
+        guard shouldShowVoiceControl else { return }
         guard !isRecordingVoiceNote && !isPreparingVoiceNote else { return }
         isPreparingVoiceNote = true
         Task { @MainActor in

bitchat/Views/FingerprintView.swift

@@ -10,7 +10,7 @@ import SwiftUI
 
 struct FingerprintView: View {
     @ObservedObject var viewModel: ChatViewModel
-    let peerID: String
+    let peerID: PeerID
     @Environment(\.dismiss) var dismiss
     @Environment(\.colorScheme) var colorScheme
     
@@ -65,15 +65,12 @@ struct FingerprintView: View {
             
             VStack(alignment: .leading, spacing: 16) {
                 // Prefer short mesh ID for session/encryption status
-                let statusPeerID: String = {
+                let statusPeerID = viewModel.getShortIDForNoiseKey(peerID)
-                    if peerID.count == 64, let short = viewModel.getShortIDForNoiseKey(peerID) { return short.id }
-                    return peerID
-                }()
                 // Resolve a friendly name
                 let peerNickname: String = {
-                    if let p = viewModel.getPeer(byID: PeerID(str: statusPeerID)) { return p.displayName }
+                    if let p = viewModel.getPeer(byID: statusPeerID) { return p.displayName }
-                    if let name = viewModel.meshService.peerNickname(peerID: PeerID(str: statusPeerID)) { return name }
+                    if let name = viewModel.meshService.peerNickname(peerID: statusPeerID) { return name }
-                    if peerID.count == 64, let data = Data(hexString: peerID) {
+                    if let data = peerID.noiseKey {
                         if let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: data), !fav.peerNickname.isEmpty { return fav.peerNickname }
                         let fp = data.sha256Fingerprint()
                         if let social = viewModel.identityManager.getSocialIdentity(for: fp) {
@@ -84,7 +81,7 @@ struct FingerprintView: View {
                     return Strings.unknownPeer()
                 }()
                 // Accurate encryption state based on short ID session
-                let encryptionStatus = viewModel.getEncryptionStatus(for: PeerID(str: statusPeerID))
+                let encryptionStatus = viewModel.getEncryptionStatus(for: statusPeerID)
                 
                 HStack {
                     if let icon = encryptionStatus.icon {
@@ -115,7 +112,7 @@ struct FingerprintView: View {
                         .font(.bitchatSystem(size: 12, weight: .bold, design: .monospaced))
                         .foregroundColor(textColor.opacity(0.7))
                     
-                    if let fingerprint = viewModel.getFingerprint(for: PeerID(str: statusPeerID)) {
+                    if let fingerprint = viewModel.getFingerprint(for: statusPeerID) {
                         Text(formatFingerprint(fingerprint))
                             .font(.bitchatSystem(size: 14, design: .monospaced))
                             .foregroundColor(textColor)
@@ -176,7 +173,6 @@ struct FingerprintView: View {
                 // Verification status
                 if encryptionStatus == .noiseSecured || encryptionStatus == .noiseVerified {
                     let isVerified = encryptionStatus == .noiseVerified
-                    let peerID = PeerID(str: peerID)
                     
                     VStack(spacing: 12) {
                         Text(isVerified ? Strings.verifiedBadge : Strings.notVerifiedBadge)
@@ -240,8 +236,6 @@ struct FingerprintView: View {
         .padding()
         .frame(maxWidth: .infinity, maxHeight: .infinity)
         .background(backgroundColor)
-        .presentationDetents([.large])
-        .presentationDragIndicator(.visible)
     }
     
     private func formatFingerprint(_ fingerprint: String) -> String {

bitchat/Views/LocationChannelsSheet.swift

@@ -125,9 +125,6 @@ struct LocationChannelsSheet: View {
             .navigationTitle("")
             #endif
         }
-        #if os(iOS)
-        .presentationDetents([.large])
-        #endif
         #if os(macOS)
         .frame(minWidth: 420, minHeight: 520)
         #endif

bitchat/Views/LocationNotesView.swift

@@ -78,9 +78,6 @@ struct LocationNotesView: View {
             .navigationTitle("")
             #endif
         }
-       #if os(iOS)
-        .presentationDetents([.large])
-        #endif
         .background(backgroundColor)
         .onDisappear { manager.cancel() }
         .onChange(of: geohash) { newValue in

bitchat/Views/MeshPeerList.swift

@@ -4,9 +4,9 @@ struct MeshPeerList: View {
     @ObservedObject var viewModel: ChatViewModel
     let textColor: Color
     let secondaryTextColor: Color
-    let onTapPeer: (String) -> Void
+    let onTapPeer: (PeerID) -> Void
-    let onToggleFavorite: (String) -> Void
+    let onToggleFavorite: (PeerID) -> Void
-    let onShowFingerprint: (String) -> Void
+    let onShowFingerprint: (PeerID) -> Void
     @Environment(\.colorScheme) var colorScheme
 
     @State private var orderedIDs: [String] = []
@@ -130,7 +130,7 @@ struct MeshPeerList: View {
                         }
 
                         if !isMe {
-                            Button(action: { onToggleFavorite(peer.peerID.id) }) {
+                            Button(action: { onToggleFavorite(peer.peerID) }) {
                                 Image(systemName: (peer.favoriteStatus?.isFavorite ?? false) ? "star.fill" : "star")
                                     .font(.bitchatSystem(size: 12))
                                     .foregroundColor((peer.favoriteStatus?.isFavorite ?? false) ? .yellow : secondaryTextColor)
@@ -142,8 +142,8 @@ struct MeshPeerList: View {
                     .padding(.vertical, 4)
                     .padding(.top, idx == 0 ? 10 : 0)
                     .contentShape(Rectangle())
-                    .onTapGesture { if !isMe { onTapPeer(peer.peerID.id) } }
+                    .onTapGesture { if !isMe { onTapPeer(peer.peerID) } }
-                    .onTapGesture(count: 2) { if !isMe { onShowFingerprint(peer.peerID.id) } }
+                    .onTapGesture(count: 2) { if !isMe { onShowFingerprint(peer.peerID) } }
                 }
             }
             // Seed and update order outside result builder

bitchat/Views/VerificationViews.swift

@@ -388,10 +388,6 @@ struct VerificationSheetView: View {
             .padding(.vertical, 14)
         }
         .background(backgroundColor)
-        #if os(iOS)
-        .presentationDetents([.large])
-        .presentationDragIndicator(.visible)
-        #endif
         .onDisappear { showingScanner = false }
     }
 }

bitchatTests/BLEServiceTests.swift

@@ -298,5 +298,5 @@ private final class MockBitchatDelegate: BitchatDelegate {
     func didUpdateMessageDeliveryStatus(_ messageID: String, status: DeliveryStatus) {}
     func didReceiveNoisePayload(from peerID: PeerID, type: NoisePayloadType, payload: Data, timestamp: Date) {}
     func didUpdateBluetoothState(_ state: CBManagerState) {}
-    func didReceivePublicMessage(from peerID: String, nickname: String, content: String, timestamp: Date) {}
+    func didReceivePublicMessage(from peerID: PeerID, nickname: String, content: String, timestamp: Date, messageID: String?) {}
 }

bitchatTests/EndToEnd/PrivateChatE2ETests.swift

@@ -186,11 +186,11 @@ struct PrivateChatE2ETests {
             // Bob relays private messages for Charlie
             bob.packetDeliveryHandler = { packet in
                 if let recipientID = packet.recipientID,
-                   String(data: recipientID, encoding: .utf8) == charlie.peerID {
+                   PeerID(data: recipientID) == charlie.peerID {
                     // Relay to Charlie
                     var relayPacket = packet
                     relayPacket.ttl = packet.ttl - 1
-                    self.charlie.simulateIncomingPacket(relayPacket)
+                    charlie.simulateIncomingPacket(relayPacket)
                 }
             }
             

bitchatTests/EndToEnd/PublicChatE2ETests.swift

@@ -388,7 +388,7 @@ struct PublicChatE2ETests {
 
             if let message = BitchatMessage(packet.payload) {
                 // Don't relay own messages
-                guard message.senderPeerID?.id != node.peerID else { return }
+                guard message.senderPeerID != node.peerID else { return }
                 
                 // Create relay message
                 let relayMessage = BitchatMessage(

bitchatTests/Fragmentation/FragmentationTests.swift

@@ -209,7 +209,7 @@ extension FragmentationTests {
         func didUpdateMessageDeliveryStatus(_ messageID: String, status: DeliveryStatus) {}
         func didReceiveNoisePayload(from peerID: PeerID, type: NoisePayloadType, payload: Data, timestamp: Date) {}
         func didUpdateBluetoothState(_ state: CBManagerState) {}
-        func didReceivePublicMessage(from peerID: PeerID, nickname: String, content: String, timestamp: Date) {
+        func didReceivePublicMessage(from peerID: PeerID, nickname: String, content: String, timestamp: Date, messageID: String?) {
             publicMessages.append((peerID, nickname, content))
         }
         func didReceiveRegionalPublicMessage(from peerID: PeerID, nickname: String, content: String, timestamp: Date) {}

bitchatTests/GossipSyncManagerTests.swift

@@ -125,16 +125,138 @@ struct GossipSyncManagerTests {
         #expect(manager._hasAnnouncement(for: PeerID(str: peerHex)) == false)
         #expect(manager._messageCount(for: PeerID(str: peerHex)) == 0)
     }
+
+    @Test func maintenanceEmitsTypedSyncRequests() throws {
+        var config = GossipSyncManager.Config()
+        config.seenCapacity = 10
+        config.fragmentCapacity = 5
+        config.fileTransferCapacity = 4
+        config.messageSyncIntervalSeconds = 1
+        config.fragmentSyncIntervalSeconds = 1
+        config.fileTransferSyncIntervalSeconds = 1
+        config.maintenanceIntervalSeconds = 0
+
+        let manager = GossipSyncManager(myPeerID: myPeerID, config: config)
+        let delegate = RecordingDelegate()
+        manager.delegate = delegate
+
+        let sender = try #require(Data(hexString: "1122334455667788"))
+        let now = UInt64(Date().timeIntervalSince1970 * 1000)
+
+        let announcePacket = BitchatPacket(
+            type: MessageType.announce.rawValue,
+            senderID: sender,
+            recipientID: nil,
+            timestamp: now,
+            payload: Data(),
+            signature: nil,
+            ttl: 1
+        )
+        let messagePacket = BitchatPacket(
+            type: MessageType.message.rawValue,
+            senderID: sender,
+            recipientID: nil,
+            timestamp: now,
+            payload: Data([0x01]),
+            signature: nil,
+            ttl: 1
+        )
+        let fragmentPacket = BitchatPacket(
+            type: MessageType.fragment.rawValue,
+            senderID: sender,
+            recipientID: nil,
+            timestamp: now,
+            payload: Data([0xAA]),
+            signature: nil,
+            ttl: 1
+        )
+        let filePacket = BitchatPacket(
+            type: MessageType.fileTransfer.rawValue,
+            senderID: sender,
+            recipientID: nil,
+            timestamp: now,
+            payload: Data([0xBB]),
+            signature: nil,
+            ttl: 1,
+            version: 2
+        )
+
+        manager.onPublicPacketSeen(announcePacket)
+        manager.onPublicPacketSeen(messagePacket)
+        manager.onPublicPacketSeen(fragmentPacket)
+        manager.onPublicPacketSeen(filePacket)
+
+        manager._performMaintenanceSynchronously(now: Date())
+
+        let sentPackets = delegate.packets
+        #expect(sentPackets.count == 3)
+        let decoded = sentPackets.compactMap { RequestSyncPacket.decode(from: $0.payload) }
+        #expect(decoded.count == 3)
+        #expect(decoded[0].types == .publicMessages)
+        #expect(decoded[1].types == .fragment)
+        #expect(decoded[2].types == .fileTransfer)
+    }
+
+    @Test func handleRequestSyncHonorsTypeFilter() async throws {
+        var config = GossipSyncManager.Config()
+        config.seenCapacity = 5
+        config.fragmentCapacity = 5
+        config.fileTransferCapacity = 0
+        config.messageSyncIntervalSeconds = 0
+        config.fragmentSyncIntervalSeconds = 0
+        config.fileTransferSyncIntervalSeconds = 0
+
+        let manager = GossipSyncManager(myPeerID: myPeerID, config: config)
+        let delegate = RecordingDelegate()
+        manager.delegate = delegate
+
+        let sender = try #require(Data(hexString: "aabbccddeeff0011"))
+        let now = UInt64(Date().timeIntervalSince1970 * 1000)
+
+        let messagePacket = BitchatPacket(
+            type: MessageType.message.rawValue,
+            senderID: sender,
+            recipientID: nil,
+            timestamp: now,
+            payload: Data([0x10]),
+            signature: nil,
+            ttl: 1
+        )
+
+        let fragmentPacket = BitchatPacket(
+            type: MessageType.fragment.rawValue,
+            senderID: sender,
+            recipientID: nil,
+            timestamp: now,
+            payload: Data([0x20]),
+            signature: nil,
+            ttl: 1
+        )
+
+        manager.onPublicPacketSeen(messagePacket)
+        manager.onPublicPacketSeen(fragmentPacket)
+
+        let peer = PeerID(str: "FFFFFFFFFFFFFFFF")
+        let request = RequestSyncPacket(p: 4, m: 1, data: Data(), types: .fragment)
+        manager.handleRequestSync(from: peer, request: request)
+
+        try await sleep(0.01)
+        let sentPackets = delegate.packets
+        #expect(sentPackets.count == 1)
+        #expect(sentPackets[0].type == MessageType.fragment.rawValue)
+    }
 }
 
 private final class RecordingDelegate: GossipSyncManager.Delegate {
     var onSend: (() -> Void)?
     private(set) var lastPacket: BitchatPacket?
+    private(set) var packets: [BitchatPacket] = []
     private let lock = NSLock()
 
     func sendPacket(_ packet: BitchatPacket) {
         lock.lock()
         lastPacket = packet
+        packets.append(packet)
         lock.unlock()
         onSend?()
     }

bitchatTests/InputValidatorTests.swift

@@ -0,0 +1,192 @@
+//
+// InputValidatorTests.swift
+// bitchatTests
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import Testing
+import Foundation
+@testable import bitchat
+
+struct InputValidatorTests {
+
+    // MARK: - Basic Validation Tests
+
+    @Test func validStringPassesValidation() throws {
+        let result = InputValidator.validateUserString("Hello World", maxLength: 100)
+        #expect(result == "Hello World")
+    }
+
+    @Test func emptyStringReturnsNil() throws {
+        let result = InputValidator.validateUserString("", maxLength: 100)
+        #expect(result == nil)
+    }
+
+    @Test func whitespaceOnlyStringReturnsNil() throws {
+        let result = InputValidator.validateUserString("   \n\t  ", maxLength: 100)
+        #expect(result == nil)
+    }
+
+    @Test func stringExceedingMaxLengthReturnsNil() throws {
+        let longString = String(repeating: "a", count: 101)
+        let result = InputValidator.validateUserString(longString, maxLength: 100)
+        #expect(result == nil)
+    }
+
+    @Test func stringAtMaxLengthIsAccepted() throws {
+        let exactString = String(repeating: "a", count: 100)
+        let result = InputValidator.validateUserString(exactString, maxLength: 100)
+        #expect(result == exactString)
+    }
+
+    @Test func whitespaceIsTrimmed() throws {
+        let result = InputValidator.validateUserString("  Hello  ", maxLength: 100)
+        #expect(result == "Hello")
+    }
+
+    // MARK: - Control Character Tests
+
+    @Test func nullCharacterIsRejected() throws {
+        let stringWithNull = "Hello\u{0000}World"
+        let result = InputValidator.validateUserString(stringWithNull, maxLength: 100)
+        #expect(result == nil)
+    }
+
+    @Test func bellCharacterIsRejected() throws {
+        let stringWithBell = "Hello\u{0007}World"
+        let result = InputValidator.validateUserString(stringWithBell, maxLength: 100)
+        #expect(result == nil)
+    }
+
+    @Test func backspaceCharacterIsRejected() throws {
+        let stringWithBackspace = "Hello\u{0008}World"
+        let result = InputValidator.validateUserString(stringWithBackspace, maxLength: 100)
+        #expect(result == nil)
+    }
+
+    @Test func escapeCharacterIsRejected() throws {
+        let stringWithEscape = "Hello\u{001B}World"
+        let result = InputValidator.validateUserString(stringWithEscape, maxLength: 100)
+        #expect(result == nil)
+    }
+
+    @Test func deleteCharacterIsRejected() throws {
+        let stringWithDelete = "Hello\u{007F}World"
+        let result = InputValidator.validateUserString(stringWithDelete, maxLength: 100)
+        #expect(result == nil)
+    }
+
+    @Test func multipleControlCharactersAreRejected() throws {
+        let stringWithMultiple = "Hello\u{0000}\u{0007}\u{001B}World"
+        let result = InputValidator.validateUserString(stringWithMultiple, maxLength: 100)
+        #expect(result == nil)
+    }
+
+    // MARK: - Unicode and Special Character Tests
+
+    @Test func emojiIsAccepted() throws {
+        let result = InputValidator.validateUserString("Hello 👋 World", maxLength: 100)
+        #expect(result == "Hello 👋 World")
+    }
+
+    @Test func unicodeCharactersAreAccepted() throws {
+        let result = InputValidator.validateUserString("Hello 世界 مرحبا", maxLength: 100)
+        #expect(result == "Hello 世界 مرحبا")
+    }
+
+    @Test func specialCharactersAreAccepted() throws {
+        let result = InputValidator.validateUserString("Hello!@#$%^&*()_+-=[]{}|;':\",./<>?", maxLength: 100)
+        #expect(result == "Hello!@#$%^&*()_+-=[]{}|;':\",./<>?")
+    }
+
+    // MARK: - Nickname Validation Tests
+
+    @Test func validNicknameIsAccepted() throws {
+        let result = InputValidator.validateNickname("Alice")
+        #expect(result == "Alice")
+    }
+
+    @Test func nicknameWithEmojiIsAccepted() throws {
+        let result = InputValidator.validateNickname("Alice 🚀")
+        #expect(result == "Alice 🚀")
+    }
+
+    @Test func nicknameTooLongIsRejected() throws {
+        let longNickname = String(repeating: "a", count: 51)
+        let result = InputValidator.validateNickname(longNickname)
+        #expect(result == nil)
+    }
+
+    @Test func nicknameAtMaxLengthIsAccepted() throws {
+        let exactNickname = String(repeating: "a", count: 50)
+        let result = InputValidator.validateNickname(exactNickname)
+        #expect(result == exactNickname)
+    }
+
+    @Test func nicknameWithControlCharacterIsRejected() throws {
+        let result = InputValidator.validateNickname("Alice\u{0000}")
+        #expect(result == nil)
+    }
+
+    // MARK: - Timestamp Validation Tests
+
+    @Test func currentTimestampIsValid() throws {
+        let now = Date()
+        let result = InputValidator.validateTimestamp(now)
+        #expect(result == true)
+    }
+
+    @Test func timestampWithinOneHourIsValid() throws {
+        let thirtyMinutesAgo = Date().addingTimeInterval(-30 * 60)
+        let result = InputValidator.validateTimestamp(thirtyMinutesAgo)
+        #expect(result == true)
+    }
+
+    @Test func timestampTwoHoursAgoIsInvalid() throws {
+        let twoHoursAgo = Date().addingTimeInterval(-2 * 3600)
+        let result = InputValidator.validateTimestamp(twoHoursAgo)
+        #expect(result == false)
+    }
+
+    @Test func timestampTwoHoursInFutureIsInvalid() throws {
+        let twoHoursFromNow = Date().addingTimeInterval(2 * 3600)
+        let result = InputValidator.validateTimestamp(twoHoursFromNow)
+        #expect(result == false)
+    }
+
+    @Test func timestampAtOneHourBoundaryIsValid() throws {
+        // Just slightly within the one-hour window
+        let almostOneHourAgo = Date().addingTimeInterval(-3599)
+        let result = InputValidator.validateTimestamp(almostOneHourAgo)
+        #expect(result == true)
+    }
+
+    // MARK: - Edge Cases
+
+    @Test func singleCharacterStringIsAccepted() throws {
+        let result = InputValidator.validateUserString("a", maxLength: 100)
+        #expect(result == "a")
+    }
+
+    @Test func stringWithOnlyNewlinesIsRejected() throws {
+        let result = InputValidator.validateUserString("\n\n\n", maxLength: 100)
+        #expect(result == nil)
+    }
+
+    @Test func stringWithMixedWhitespaceIsTrimmed() throws {
+        let result = InputValidator.validateUserString(" \t\nHello\n\t ", maxLength: 100)
+        #expect(result == "Hello")
+    }
+
+    @Test func stringWithLeadingControlCharacterIsRejected() throws {
+        let result = InputValidator.validateUserString("\u{0000}Hello", maxLength: 100)
+        #expect(result == nil)
+    }
+
+    @Test func stringWithTrailingControlCharacterIsRejected() throws {
+        let result = InputValidator.validateUserString("Hello\u{0000}", maxLength: 100)
+        #expect(result == nil)
+    }
+}

bitchatTests/MimeTypeTests.swift

@@ -0,0 +1,90 @@
+//
+// MimeTypeTests.swift
+// bitchatTests
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import Testing
+import Foundation
+@testable import bitchat
+
+// MARK: - MimeType Mapping and Signature Tests
+
+struct MimeTypeTests {
+
+    // MARK: MIME → Enum Parsing + Default Extension
+    @Test(arguments: [
+        ("image/jpeg", MimeType.jpeg, "jpg"),
+        ("image/jpg", MimeType.jpeg, "jpg"),
+        ("image/png", MimeType.png, "png"),
+        ("image/gif", MimeType.gif, "gif"),
+        ("image/webp", MimeType.webp, "webp"),
+        ("audio/mp4", MimeType.mp4Audio, "m4a"),
+        ("audio/m4a", MimeType.m4a, "m4a"),
+        ("audio/aac", MimeType.aac, "m4a"),
+        ("audio/mpeg", MimeType.mpeg, "mp3"),
+        ("audio/mp3", MimeType.mp3, "mp3"),
+        ("audio/wav", MimeType.wav, "wav"),
+        ("audio/x-wav", MimeType.xWav, "wav"),
+        ("audio/ogg", MimeType.ogg, "ogg"),
+        ("application/pdf", MimeType.pdf, "pdf"),
+        ("application/octet-stream", MimeType.octetStream, "bin")
+    ])
+    func mimeTypeParsingAndExtensions(
+        mimeString: String,
+        expectedType: MimeType,
+        expectedExt: String
+    ) throws {
+        guard let mime = MimeType(mimeString) else {
+            Issue.record("Failed to parse \(mimeString)")
+            return
+        }
+
+        #expect(mime == expectedType, "Expected \(expectedType) for \(mimeString)")
+        #expect(mime.mimeString == expectedType.mimeString)
+        #expect(mime.defaultExtension == expectedExt)
+        #expect(mime.isAllowed)
+    }
+
+    // MARK: - File Signature Validation
+    @Test(arguments: [
+        // === Image types ===
+        (MimeType.jpeg, [0xFF, 0xD8, 0xFF]),
+        (MimeType.png,  [0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A]),
+        (MimeType.gif,  [0x47, 0x49, 0x46, 0x38, 0x39, 0x61]), // "GIF89a"
+        (MimeType.webp, [0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00,
+                         0x57, 0x45, 0x42, 0x50]),             // "RIFF....WEBP"
+
+        // === Audio types ===
+        (MimeType.mp3,  [0x49, 0x44, 0x33]),                   // "ID3"
+        (MimeType.wav,  [0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00,
+                         0x57, 0x41, 0x56, 0x45]),             // "RIFF....WAVE"
+        (MimeType.ogg,  [0x4F, 0x67, 0x67, 0x53]),             // "OggS"
+
+        // === Application types ===
+        (MimeType.pdf,  [0x25, 0x50, 0x44, 0x46])              // "%PDF"
+    ])
+    func validSignatures(mime: MimeType, bytes: [UInt8]) throws {
+        let data = Data(bytes)
+        #expect(mime.matches(data: data),
+                "Expected \(mime.mimeString) to match its signature")
+    }
+
+    // MARK: - Negative Tests
+    @Test func invalidDataDoesNotMatch() throws {
+        let badData = Data(repeating: 0x00, count: 16)
+        for mime in MimeType.allCases where mime != .octetStream {
+            #expect(!mime.matches(data: badData),
+                    "Unexpectedly matched \(mime.mimeString) with zeroed data")
+        }
+    }
+
+    // MARK: - Octet-stream (generic binary)
+    @Test func octetStreamAlwaysMatches() throws {
+        let randomData = Data([0x00, 0x11, 0x22, 0x33])
+        #expect(MimeType.octetStream.matches(data: randomData),
+                "application/octet-stream should always be considered valid")
+    }
+}

bitchatTests/Mocks/MockBLEService.swift

@@ -203,10 +203,7 @@ final class MockBLEService: NSObject {
                let target = bus.service(for: recipientPeerID) {
                 target.simulateIncomingPacket(packet)
             } else {
-                // Not directly connected: deliver to neighbors for relay; also deliver directly if target is known
+                // Not directly connected: deliver to neighbors for relay
-                if let target = bus.service(for: recipientPeerID) {
-                    target.simulateIncomingPacket(packet)
-                }
                 for neighbor in neighbors() where neighbor.peerID != recipientPeerID {
                     neighbor.simulateIncomingPacket(packet)
                 }

bitchatTests/NostrProtocolTests.swift

@@ -126,7 +126,7 @@ struct NostrProtocolTests {
 
         // Build a DELIVERED ack embedded payload (geohash-style, no recipient peer ID)
         let messageID = "TEST-MSG-DELIVERED-1"
-        let senderPeerID = "0123456789abcdef" // 8-byte hex peer ID
+        let senderPeerID = PeerID(str: "0123456789abcdef") // 8-byte hex peer ID
 
         let embedded = try #require(
             NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .delivered, messageID: messageID, senderPeerID: senderPeerID),
@@ -176,7 +176,7 @@ struct NostrProtocolTests {
         let recipient = try NostrIdentity.generate()
         
         let messageID = "TEST-MSG-READ-1"
-        let senderPeerID = "fedcba9876543210" // 8-byte hex peer ID
+        let senderPeerID = PeerID(str: "fedcba9876543210") // 8-byte hex peer ID
         let embedded = try #require(
             NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .readReceipt, messageID: messageID, senderPeerID: senderPeerID),
             "Failed to embed read ack"

bitchatTests/Utils/PeerIDTests.swift

@@ -273,7 +273,7 @@ struct PeerIDTests {
     @Test func comparable_sorting_and_equality() {
         let p1 = PeerID(str: "aaa")
         let p2 = PeerID(str: "bbb")
-        let p3 = PeerID(str: "bbb")
+        let p3 = PeerID(str: "BBB")
         
         #expect(p1 < p2)
         #expect(p2 >= p1)
@@ -284,44 +284,18 @@ struct PeerIDTests {
     }
     
     @Test func equality() {
-        let string = "aaa"
+        let peerID = PeerID(str: "aaa")
-        let peerID = PeerID(str: string)
-        let badString = "bbb"
-        
-        // PeerID == String
-        #expect(peerID == string)
-        #expect(peerID == Optional(string))
-        #expect(Optional(peerID) == string)
-        #expect(Optional(peerID) == Optional(string))
-
-        // PeerID != String
-        #expect(peerID != badString)
-        #expect(peerID != Optional(badString))
-        #expect(Optional(peerID) != badString)
-        #expect(Optional(peerID) != Optional(badString))
-        
-        // String == PeerID
-        #expect(string == peerID)
-        #expect(Optional(string) == peerID)
-        #expect(string == Optional(peerID))
-        #expect(Optional(string) == Optional(peerID))
-
-        // String != PeerID
-        #expect(badString != peerID)
-        #expect(Optional(badString) != peerID)
-        #expect(badString != Optional(peerID))
-        #expect(Optional(badString) != Optional(peerID))
         
         // Regular PeerID <> PeerID
-        #expect(peerID == PeerID(str: "aaa"))
+        #expect(peerID == PeerID(str: "AAA"))
-        #expect(peerID == Optional(PeerID(str: "aaa")))
+        #expect(peerID == Optional(PeerID(str: "AAA")))
-        #expect(PeerID(str: "aaa") == peerID)
+        #expect(PeerID(str: "AAA") == peerID)
-        #expect(Optional(PeerID(str: "aaa")) == Optional(peerID))
+        #expect(Optional(PeerID(str: "AAA")) == Optional(peerID))
         
-        #expect(peerID != PeerID(str: "bbb"))
+        #expect(peerID != PeerID(str: "BBB"))
-        #expect(peerID != Optional(PeerID(str: "bbb")))
+        #expect(peerID != Optional(PeerID(str: "BBB")))
-        #expect(PeerID(str: "bbb") != peerID)
+        #expect(PeerID(str: "BBB") != peerID)
-        #expect(Optional(PeerID(str: "bbb")) != Optional(peerID))
+        #expect(Optional(PeerID(str: "BBB")) != Optional(peerID))
     }
     
     // MARK: - Computed properties

localPackages/BitLogger/Package.swift

@@ -18,6 +18,10 @@ let package = Package(
         .target(
             name: "BitLogger",
             path: "Sources"
+        ),
+        .testTarget(
+            name: "BitLoggerTests",
+            dependencies: ["BitLogger"]
         )
     ]
 )

localPackages/BitLogger/Sources/SecureLogger.swift

@@ -68,22 +68,6 @@ public final class SecureLogger {
         return formatter
     }()
     
-    // MARK: - Cached Regex Patterns
-    
-    private static let fingerprintPattern = #/[a-fA-F0-9]{64}/#
-    private static let base64Pattern = #/[A-Za-z0-9+/]{40,}={0,2}/#
-    private static let passwordPattern = #/password["\s:=]+["']?[^"'\s]+["']?/#
-    private static let peerIDPattern = #/peerID: ([a-zA-Z0-9]{8})[a-zA-Z0-9]+/#
-    
-    // MARK: - Sanitization Cache
-    
-    private static let sanitizationCache: NSCache<NSString, NSString> = {
-        let cache = NSCache<NSString, NSString>()
-        cache.countLimit = 100 // Keep last 100 sanitized strings
-        return cache
-    }()
-    private static let cacheQueue = DispatchQueue(label: "chat.bitchat.securelogger.cache", attributes: .concurrent)
-    
     // MARK: - Log Levels
     
     enum LogLevel {
@@ -161,8 +145,8 @@ public extension SecureLogger {
     static func error(_ error: Error, context: @autoclosure () -> String, category: OSLog = .noise,
                       file: String = #file, line: Int = #line, function: String = #function) {
         let location = formatLocation(file: file, line: line, function: function)
-        let sanitized = sanitize(context())
+        let sanitized = context().sanitized()
-        let errorDesc = sanitize(error.localizedDescription)
+        let errorDesc = error.localizedDescription.sanitized()
         
         #if DEBUG
         os_log("%{public}@ Error in %{public}@: %{public}@", log: category, type: .error, location, sanitized, errorDesc)
@@ -186,15 +170,15 @@ public extension SecureLogger {
         var message: String {
             switch self {
             case .handshakeStarted(let peerID):
-                return "Handshake started with peer: \(sanitize(peerID))"
+                return "Handshake started with peer: \(peerID.sanitized())"
             case .handshakeCompleted(let peerID):
-                return "Handshake completed with peer: \(sanitize(peerID))"
+                return "Handshake completed with peer: \(peerID.sanitized())"
             case .handshakeFailed(let peerID, let error):
-                return "Handshake failed with peer: \(sanitize(peerID)), error: \(error)"
+                return "Handshake failed with peer: \(peerID.sanitized()), error: \(error)"
             case .sessionExpired(let peerID):
-                return "Session expired for peer: \(sanitize(peerID))"
+                return "Session expired for peer: \(peerID.sanitized())"
             case .authenticationFailed(let peerID):
-                return "Authentication failed for peer: \(sanitize(peerID))"
+                return "Authentication failed for peer: \(peerID.sanitized())"
             }
         }
     }
@@ -249,7 +233,7 @@ private extension SecureLogger {
                     file: String, line: Int, function: String) {
         guard shouldLog(level) else { return }
         let location = formatLocation(file: file, line: line, function: function)
-        let sanitized = sanitize("\(location) \(message())")
+        let sanitized = "\(location) \(message())".sanitized()
         
         #if DEBUG
         os_log("%{public}@", log: category, type: level.osLogType, sanitized)
@@ -282,58 +266,6 @@ private extension SecureLogger {
         let timestamp = timestampFormatter.string(from: Date())
         return "[\(timestamp)] [\(fileName):\(line) \(function)]"
     }
-    
-    /// Sanitize strings to remove potentially sensitive data
-    static func sanitize(_ input: String) -> String {
-        let key = input as NSString
-        
-        // Check cache first
-        var cachedValue: String?
-        cacheQueue.sync {
-            cachedValue = sanitizationCache.object(forKey: key) as String?
-        }
-        
-        if let cached = cachedValue {
-            return cached
-        }
-        
-        // Perform sanitization
-        var sanitized = input
-        
-        // Remove full fingerprints (keep first 8 chars for debugging)
-        sanitized = sanitized.replacing(fingerprintPattern) { match in
-            let fingerprint = String(match.output)
-            return String(fingerprint.prefix(8)) + "..."
-        }
-        
-        // Remove base64 encoded data that might be keys
-        sanitized = sanitized.replacing(base64Pattern) { _ in
-            "<base64-data>"
-        }
-        
-        // Remove potential passwords (assuming they're in quotes or after "password:")
-        sanitized = sanitized.replacing(passwordPattern) { _ in
-            "password: <redacted>"
-        }
-        
-        // Truncate peer IDs to first 8 characters
-        sanitized = sanitized.replacing(peerIDPattern) { match in
-            "peerID: \(match.1)..."
-        }
-        
-        // Cache the result
-        cacheQueue.sync {
-            sanitizationCache.setObject(sanitized as NSString, forKey: key)
-        }
-        
-        return sanitized
-    }
-    
-    /// Sanitize individual values
-    static func sanitize<T>(_ value: T) -> String {
-        let stringValue = String(describing: value)
-        return sanitize(stringValue)
-    }
 }
 
 // MARK: - Migration Helper

localPackages/BitLogger/Sources/String+Sanitization.swift

@@ -0,0 +1,67 @@
+//
+// String+Sanitization.swift
+// BitLogger
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import Foundation
+
+extension String {
+    /// Sanitize strings to remove potentially sensitive data
+    func sanitized() -> String {
+        let key = self as NSString
+        
+        // Check cache first
+        if let cached = Self.queue.sync(execute: { Self.cache.object(forKey: key) }) {
+            return cached as String
+        }
+        
+        var sanitized = self
+        
+        // Remove full fingerprints (keep first 8 chars for debugging)
+        let fingerprintPattern = #/[a-fA-F0-9]{64}/#
+        sanitized = sanitized.replacing(fingerprintPattern) { match in
+            let fingerprint = String(match.output)
+            return String(fingerprint.prefix(8)) + "..."
+        }
+        
+        // Remove base64 encoded data that might be keys
+        let base64Pattern = #/[A-Za-z0-9+/]{40,}={0,2}/#
+        sanitized = sanitized.replacing(base64Pattern) { _ in
+            "<base64-data>"
+        }
+        
+        // Remove potential passwords (assuming they're in quotes or after "password:")
+        let passwordPattern = #/password["\s:=]+["']?[^"'\s]+["']?/#
+        sanitized = sanitized.replacing(passwordPattern) { _ in
+            "password: <redacted>"
+        }
+        
+        // Truncate peer IDs to first 8 characters
+        let peerIDPattern = #/peerID: ([a-zA-Z0-9]{8})[a-zA-Z0-9]+/#
+        sanitized = sanitized.replacing(peerIDPattern) { match in
+            "peerID: \(match.1)..."
+        }
+        
+        // Cache the result
+        Self.queue.sync {
+            Self.cache.setObject(sanitized as NSString, forKey: key)
+        }
+        
+        return sanitized
+    }
+}
+
+// MARK: - Cache Helpers
+
+private extension String {
+    static let queue = DispatchQueue(label: "chat.bitchat.securelogger.cache", attributes: .concurrent)
+
+    static let cache: NSCache<NSString, NSString> = {
+        let cache = NSCache<NSString, NSString>()
+        cache.countLimit = 100 // Keep last 100 sanitized strings
+        return cache
+    }()
+}

localPackages/BitLogger/Tests/StringSanitizationTests.swift

@@ -0,0 +1,143 @@
+//
+//  StringSanitizationTests.swift
+//  BitLogger
+//
+//  Created by Islam on 19/10/2025.
+//
+
+import Testing
+@testable import BitLogger
+
+struct StringSanitizationTests {
+    
+    @Test("64-hex fingerprint is truncated to first 8 chars followed by ellipsis")
+    func fingerprintTruncation() async throws {
+        let fingerprint = "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
+        #expect(fingerprint.count == 64)
+        
+        let input = "fingerprint=\(fingerprint)"
+        let output = input.sanitized()
+        
+        #expect(output.contains("fingerprint=01234567..."))
+        // Ensure no full fingerprint remains
+        #expect(output.contains(fingerprint) == false)
+    }
+    
+    @Test("Multiple fingerprints in a string are all truncated")
+    func multipleFingerprintTruncation() async throws {
+        let fp1 = String(repeating: "a", count: 64)
+        let fp2 = String(repeating: "b", count: 64)
+        let input = "fp1=\(fp1) fp2=\(fp2)"
+        let output = input.sanitized()
+        #expect(output.contains("fp1=aaaaaaaa..."))
+        #expect(output.contains("fp2=bbbbbbbb..."))
+        #expect(output.contains(fp1) == false)
+        #expect(output.contains(fp2) == false)
+    }
+    
+    @Test("Base64-like long data is replaced with <base64-data>")
+    func base64Replacement() async throws {
+        // 44+ chars of base64 characters
+        let base64ish = "QUJDREVGR0hJSktMTU5PUFFSU1RVVldYWVo5ODc2NTQzMjE="
+        let input = "payload=\(base64ish)"
+        let output = input.sanitized()
+        #expect(output == "payload=<base64-data>")
+    }
+    
+    @Test("Base64-like without padding is replaced with <base64-data>")
+    func base64NoPaddingReplacement() async throws {
+        let base64ish = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
+        #expect(base64ish.count >= 40)
+        let input = "b64:\(base64ish)"
+        let output = input.sanitized()
+        #expect(output == "b64:<base64-data>")
+    }
+    
+    @Test("Short base64-like strings (below threshold) are not replaced")
+    func shortBase64NotReplaced() async throws {
+        let short = "QUJDREVGR0hJSktMTU5P" // < 40 chars
+        let input = "payload=\(short)"
+        let output = input.sanitized()
+        #expect(output == input)
+    }
+    
+    @Test("Password redaction for key:value formats", arguments: [
+        "password: secret123",
+        "password=secret123",
+        "password = secret123",
+        "password: 'secret123'",
+        "password:\"secret123\"",
+        "password='secret123'"
+    ])
+    func passwordRedactionKeyValue(password: String) async throws {
+        #expect(password.sanitized() == "password: <redacted>")
+    }
+    
+    @Test("Password redaction inside wider messages")
+    func passwordRedactionInContext() async throws {
+        let input = "user=john password: 'p@ssW0rd' attempt=1"
+        let output = input.sanitized()
+        #expect(output == "user=john password: <redacted> attempt=1")
+    }
+    
+    @Test("PeerID is truncated to first 8 chars followed by ellipsis")
+    func peerIDTruncation() async throws {
+        let peer = "ABCDEF12GHIJKL34"
+        let input = "peerID: \(peer)"
+        let output = input.sanitized()
+        #expect(output == "peerID: ABCDEF12...")
+    }
+    
+    @Test("PeerID not truncated when exactly 8 chars")
+    func peerIDExactlyEightNotTruncated() async throws {
+        let peer = "ABCDEF12"
+        let input = "peerID: \(peer)"
+        let output = input.sanitized()
+        // Pattern only matches when there are more than 8 trailing chars, so unchanged
+        #expect(output == input)
+    }
+    
+    @Test("Non-matching content remains unchanged")
+    func nonMatchingUnchanged() async throws {
+        let input = "Hello world 123 - nothing sensitive here."
+        let output = input.sanitized()
+        #expect(output == input)
+    }
+    
+    @Test("Idempotency: sanitizing twice yields same result")
+    func idempotentSanitization() async throws {
+        let input = """
+        fingerprint=0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef \
+        password: "superSecret" \
+        peerID: ZYXWVUT987654321 \
+        payload=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/
+        """
+        let once = input.sanitized()
+        let twice = once.sanitized()
+        #expect(once == twice)
+    }
+    
+    @Test("Mixed content: all rules apply in a single string")
+    func mixedContent() async throws {
+        let fingerprint = "fedcba9876543210fedcba9876543210fedcba9876543210fedcba9876543210"
+        let base64ish = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
+        let peer = "PEERID01EXTRA"
+        let input = "fp=\(fingerprint) password='x' peerID: \(peer) data=\(base64ish)"
+        let output = input.sanitized()
+        #expect(output.contains("fp=fedcba98..."))
+        #expect(output.contains("password: <redacted>"))
+        #expect(output.contains("peerID: PEERID01..."))
+        #expect(output.contains("data=<base64-data>"))
+        #expect(output.contains(fingerprint) == false)
+        #expect(output.contains(base64ish) == false)
+    }
+    
+    @Test("Cache returns consistent result for repeated inputs")
+    func cacheHitConsistency() async throws {
+        let input = "password: hunter2"
+        let first = input.sanitized()
+        let second = input.sanitized()
+        #expect(first == "password: <redacted>")
+        #expect(first == second)
+    }
+}