temporary

app/src/main/java/com/bitchat/android/mesh/BluetoothConnectionManager.kt

@@ -99,6 +99,20 @@ class BluetoothConnectionManager(
         try {
             isActive = true
             
+
+        // CRITICAL FIX: To be discoverable by iOS, we MUST set the adapter's name
+        // to our 8-character peerID. iOS uses the `localName` field for discovery.
+        try {
+            if (bluetoothAdapter?.name != myPeerID) {
+                bluetoothAdapter?.name = myPeerID
+                Log.d(TAG, "Set Bluetooth adapter name to peerID: $myPeerID for iOS compatibility.")
+            }
+        } catch (se: SecurityException) {
+            Log.e(TAG, "Missing BLUETOOTH_CONNECT permission to set adapter name.", se)
+            // This is not fatal, but will prevent discovery by iOS clients.
+            // We can still be discovered if the iOS client initiates the connection.
+        }
+
             // Start all component managers
             connectionScope.launch {
                 // Start connection tracker first

app/src/main/java/com/bitchat/android/mesh/BluetoothMeshService.kt

@@ -11,6 +11,7 @@ import com.bitchat.android.model.ReadReceipt
 import com.bitchat.android.protocol.BitchatPacket
 import com.bitchat.android.protocol.MessageType
 import com.bitchat.android.protocol.SpecialRecipients
+import com.bitchat.android.util.toHexString
 import kotlinx.coroutines.*
 import java.util.*
 import kotlin.random.Random
@@ -36,17 +37,17 @@ class BluetoothMeshService(private val context: Context) {
     }
     
     // My peer identification - same format as iOS
-    val myPeerID: String = generateCompatiblePeerID()
+        val myPeerID: ByteArray = generateCompatiblePeerID()
     
     // Core components - each handling specific responsibilities
     private val encryptionService = EncryptionService(context)
     private val peerManager = PeerManager()
     private val fragmentManager = FragmentManager()
-    private val securityManager = SecurityManager(encryptionService, myPeerID)
+        private val securityManager = SecurityManager(encryptionService, myPeerID.toHexString())
     private val storeForwardManager = StoreForwardManager()
-    private val messageHandler = MessageHandler(myPeerID)
+        private val messageHandler = MessageHandler(myPeerID.toHexString())
-    internal val connectionManager = BluetoothConnectionManager(context, myPeerID, fragmentManager) // Made internal for access
+        internal val connectionManager = BluetoothConnectionManager(context, myPeerID.toHexString(), fragmentManager) // Made internal for access
-    private val packetProcessor = PacketProcessor(myPeerID)
+        private val packetProcessor = PacketProcessor(myPeerID.toHexString())
     
     // Service state management
     private var isActive = false
@@ -119,6 +120,17 @@ class BluetoothMeshService(private val context: Context) {
                     storeForwardManager.sendCachedMessages(peerID)
                 }
             }
+            
+            override fun processNoiseHandshake(peerID: String, payload: ByteArray, isInitiation: Boolean): Boolean {
+                return try {
+                    // For now, treat as legacy key exchange until full Noise implementation
+                    encryptionService.addPeerPublicKey(peerID, payload)
+                    true
+                } catch (e: Exception) {
+                    Log.e(TAG, "Failed to process Noise handshake: ${e.message}")
+                    false
+                }
+            }
         }
         
         // StoreForwardManager delegates
@@ -189,6 +201,36 @@ class BluetoothMeshService(private val context: Context) {
                 return securityManager.decryptFromPeer(encryptedData, senderPeerID)
             }
             
+            // Noise protocol operations
+            override fun hasNoiseSession(peerID: String): Boolean {
+                // For now, return false since we don't have full Noise implemented
+                // This will be updated when NoiseEncryptionService is fully integrated
+                return false
+            }
+            
+            override fun initiateNoiseHandshake(peerID: String) {
+                // For now, send a basic key exchange instead of full Noise handshake
+                // This will be updated when NoiseEncryptionService is fully integrated
+                Log.d(TAG, "TODO: Initiate full Noise handshake with $peerID")
+                sendKeyExchangeToDevice()
+            }
+            
+            override fun updatePeerIDBinding(newPeerID: String, fingerprint: String, nickname: String, 
+                                           publicKey: ByteArray, previousPeerID: String?) {
+                // Update peer mapping in the PeerManager for peer ID rotation support
+                peerManager.addOrUpdatePeer(newPeerID, nickname)
+                
+                // If there was a previous peer ID, remove it to avoid duplicates
+                previousPeerID?.let { oldPeerID ->
+                    peerManager.removePeer(oldPeerID)
+                }
+                
+                // Register the public key with the delegate (ChatViewModel)
+                delegate?.registerPeerPublicKey(newPeerID, publicKey)
+                
+                Log.d(TAG, "Updated peer ID binding: $newPeerID (was: $previousPeerID), fingerprint: ${fingerprint.take(16)}...")
+            }
+            
             // Message operations  
             override fun decryptChannelMessage(encryptedContent: ByteArray, channel: String): String? {
                 return delegate?.decryptChannelMessage(encryptedContent, channel)
@@ -584,10 +626,10 @@ class BluetoothMeshService(private val context: Context) {
     /**
      * Generate peer ID compatible with iOS
      */
-    private fun generateCompatiblePeerID(): String {
+        private fun generateCompatiblePeerID(): ByteArray {
         val randomBytes = ByteArray(4)
         Random.nextBytes(randomBytes)
-        return randomBytes.joinToString("") { "%02x".format(it) }
+        return randomBytes
     }
 }
 

app/src/main/java/com/bitchat/android/mesh/MessageHandler.kt

@@ -9,6 +9,8 @@ import com.bitchat.android.model.RoutedPacket
 import com.bitchat.android.protocol.BitchatPacket
 import com.bitchat.android.protocol.MessageType
 import kotlinx.coroutines.*
+import org.json.JSONObject
+import java.security.MessageDigest
 import java.util.*
 import kotlin.random.Random
 
@@ -29,27 +31,136 @@ class MessageHandler(private val myPeerID: String) {
     private val handlerScope = CoroutineScope(Dispatchers.IO + SupervisorJob())
     
     /**
-     * Handle Noise encrypted transport message (temporarily stubbed)
+     * Handle Noise encrypted transport message
      */
     suspend fun handleNoiseEncrypted(routed: RoutedPacket) {
         val packet = routed.packet
         val peerID = routed.peerID ?: "unknown"
         
-        Log.d(TAG, "TODO: Handle Noise encrypted message from $peerID (${packet.payload.size} bytes)")
+        Log.d(TAG, "Processing Noise encrypted message from $peerID (${packet.payload.size} bytes)")
         
-        // For now, just log it - this will be implemented with actual Noise protocol handling
+        // Skip our own messages
+        if (peerID == myPeerID) return
+        
+        try {
+            // Decrypt the message using the Noise service
+            val decryptedData = delegate?.decryptFromPeer(packet.payload, peerID)
+            if (decryptedData == null) {
+                Log.w(TAG, "Failed to decrypt Noise message from $peerID - may need handshake")
+                return
+            }
+            
+            // Check if it's a special format message (type marker + payload)
+            if (decryptedData.size > 1) {
+                val typeMarker = decryptedData[0].toUByte()
+                
+                // Check if this is a delivery ACK with the new format
+                if (typeMarker == MessageType.DELIVERY_ACK.value) {
+                    // Extract the ACK JSON data (skip the type marker)
+                    val ackData = decryptedData.sliceArray(1 until decryptedData.size)
+                    
+                    // Decode the delivery ACK
+                    val ack = DeliveryAck.decode(ackData)
+                    if (ack != null) {
+                        delegate?.onDeliveryAckReceived(ack)
+                        Log.d(TAG, "Processed delivery ACK from $peerID")
+                        return
+                    }
+                }
+                
+                // Check for read receipt with type marker
+                if (typeMarker == MessageType.READ_RECEIPT.value) {
+                    val receiptData = decryptedData.sliceArray(1 until decryptedData.size)
+                    val receipt = ReadReceipt.decode(receiptData)
+                    if (receipt != null) {
+                        delegate?.onReadReceiptReceived(receipt)
+                        Log.d(TAG, "Processed read receipt from $peerID")
+                        return
+                    }
+                }
+            }
+            
+            // Try to parse as a full inner packet (for compatibility with other message types)
+            val innerPacket = BitchatPacket.fromBinaryData(decryptedData)
+            if (innerPacket != null) {
+                Log.d(TAG, "Decrypted inner packet type ${innerPacket.type} from $peerID")
+                
+                // Create a new routed packet with the decrypted inner packet
+                val innerRouted = RoutedPacket(innerPacket, peerID, routed.relayAddress)
+                
+                // Process the decrypted inner packet recursively
+                when (MessageType.fromValue(innerPacket.type)) {
+                    MessageType.MESSAGE -> handleMessage(innerRouted)
+                    MessageType.DELIVERY_ACK -> handleDeliveryAck(innerRouted)
+                    MessageType.READ_RECEIPT -> handleReadReceipt(innerRouted)
+                    else -> {
+                        Log.w(TAG, "Unexpected inner packet type: ${innerPacket.type}")
+                    }
+                }
+            } else {
+                Log.w(TAG, "Failed to parse decrypted data as packet from $peerID")
+            }
+            
+        } catch (e: Exception) {
+            Log.e(TAG, "Error processing Noise encrypted message from $peerID: ${e.message}")
+        }
     }
     
     /**
-     * Handle Noise identity announcement (temporarily stubbed)
+     * Handle Noise identity announcement - supports peer ID rotation
      */
     suspend fun handleNoiseIdentityAnnouncement(routed: RoutedPacket) {
         val packet = routed.packet
         val peerID = routed.peerID ?: "unknown"
         
-        Log.d(TAG, "TODO: Handle Noise identity announcement from $peerID (${packet.payload.size} bytes)")
+        Log.d(TAG, "Processing Noise identity announcement from $peerID (${packet.payload.size} bytes)")
         
-        // For now, just log it - this will be implemented with peer ID rotation handling
+        // Skip our own announcements
+        if (peerID == myPeerID) return
+        
+        try {
+            // Parse the identity announcement
+            val announcement = parseNoiseIdentityAnnouncement(packet.payload)
+            if (announcement == null) {
+                Log.w(TAG, "Failed to parse Noise identity announcement from $peerID")
+                return
+            }
+            
+            Log.d(TAG, "Parsed identity announcement: peerID=${announcement.peerID}, " +
+                    "nickname=${announcement.nickname}, fingerprint=${announcement.fingerprint?.take(16)}...")
+            
+            // Verify the announcement signature (basic validation)
+            // In a full implementation, this would use cryptographic verification
+            if (announcement.signature.isEmpty()) {
+                Log.w(TAG, "Identity announcement from $peerID has no signature")
+                return
+            }
+            
+            // Update peer binding in the delegate (ChatViewModel/BluetoothMeshService)
+            delegate?.updatePeerIDBinding(
+                newPeerID = announcement.peerID,
+                fingerprint = announcement.fingerprint ?: "",
+                nickname = announcement.nickname,
+                publicKey = announcement.publicKey,
+                previousPeerID = announcement.previousPeerID
+            )
+            
+            // Check if we need to initiate a handshake with this peer
+            val hasSession = delegate?.hasNoiseSession(announcement.peerID) ?: false
+            if (!hasSession) {
+                Log.d(TAG, "No session with ${announcement.peerID}, may need handshake")
+                
+                // Use lexicographic comparison to decide who initiates (prevents both sides from initiating)
+                if (myPeerID < announcement.peerID) {
+                    delegate?.initiateNoiseHandshake(announcement.peerID)
+                }
+            }
+            
+            Log.d(TAG, "Successfully processed identity announcement from $peerID")
+            
+        } catch (e: Exception) {
+            Log.e(TAG, "Error processing Noise identity announcement from $peerID: ${e.message}")
+        }
     }
     
     /**
@@ -343,6 +454,45 @@ class MessageHandler(private val myPeerID: String) {
         }
     }
     
+    /**
+     * Parse Noise identity announcement from payload
+     */
+    private fun parseNoiseIdentityAnnouncement(payload: ByteArray): NoiseIdentityAnnouncement? {
+        return try {
+            val jsonString = String(payload, Charsets.UTF_8)
+            val json = JSONObject(jsonString)
+            
+            val peerID = json.getString("peerID")
+            val nickname = json.getString("nickname")
+            val publicKeyBase64 = json.getString("publicKey")
+            val timestampMs = json.getLong("timestamp")
+            val signatureBase64 = json.getString("signature")
+            val previousPeerID = if (json.has("previousPeerID")) json.getString("previousPeerID") else null
+            
+            // Decode base64 fields
+            val publicKey = android.util.Base64.decode(publicKeyBase64, android.util.Base64.DEFAULT)
+            val signature = android.util.Base64.decode(signatureBase64, android.util.Base64.DEFAULT)
+            
+            // Calculate fingerprint from public key
+            val digest = MessageDigest.getInstance("SHA-256")
+            val hash = digest.digest(publicKey)
+            val fingerprint = hash.joinToString("") { "%02x".format(it) }
+            
+            NoiseIdentityAnnouncement(
+                peerID = peerID,
+                nickname = nickname,
+                publicKey = publicKey,
+                timestamp = Date(timestampMs),
+                signature = signature,
+                fingerprint = fingerprint,
+                previousPeerID = previousPeerID
+            )
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to parse Noise identity announcement: ${e.message}")
+            null
+        }
+    }
+    
     /**
      * Shutdown the handler
      */
@@ -351,6 +501,47 @@ class MessageHandler(private val myPeerID: String) {
     }
 }
 
+/**
+ * Noise Identity Announcement data class (compatible with iOS version)
+ */
+data class NoiseIdentityAnnouncement(
+    val peerID: String,
+    val nickname: String,
+    val publicKey: ByteArray,
+    val timestamp: Date,
+    val signature: ByteArray,
+    val fingerprint: String?,
+    val previousPeerID: String? = null
+) {
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as NoiseIdentityAnnouncement
+
+        if (peerID != other.peerID) return false
+        if (nickname != other.nickname) return false
+        if (!publicKey.contentEquals(other.publicKey)) return false
+        if (timestamp != other.timestamp) return false
+        if (!signature.contentEquals(other.signature)) return false
+        if (fingerprint != other.fingerprint) return false
+        if (previousPeerID != other.previousPeerID) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = peerID.hashCode()
+        result = 31 * result + nickname.hashCode()
+        result = 31 * result + publicKey.contentHashCode()
+        result = 31 * result + timestamp.hashCode()
+        result = 31 * result + signature.contentHashCode()
+        result = 31 * result + (fingerprint?.hashCode() ?: 0)
+        result = 31 * result + (previousPeerID?.hashCode() ?: 0)
+        return result
+    }
+}
+
 /**
  * Delegate interface for message handler callbacks
  */
@@ -373,6 +564,12 @@ interface MessageHandlerDelegate {
     fun encryptForPeer(data: ByteArray, recipientPeerID: String): ByteArray?
     fun decryptFromPeer(encryptedData: ByteArray, senderPeerID: String): ByteArray?
     
+    // Noise protocol operations
+    fun hasNoiseSession(peerID: String): Boolean
+    fun initiateNoiseHandshake(peerID: String)
+    fun updatePeerIDBinding(newPeerID: String, fingerprint: String, nickname: String, 
+                           publicKey: ByteArray, previousPeerID: String?)
+    
     // Message operations
     fun decryptChannelMessage(encryptedContent: ByteArray, channel: String): String?
     

app/src/main/java/com/bitchat/android/mesh/SecurityManager.kt

@@ -87,16 +87,52 @@ class SecurityManager(private val encryptionService: EncryptionService, private
     }
     
     /**
-     * Handle Noise handshake packet (temporarily stubbed for basic build)
+     * Handle Noise handshake packet
      */
     suspend fun handleNoiseHandshake(routed: RoutedPacket, step: Int): Boolean {
         val packet = routed.packet
         val peerID = routed.peerID ?: "unknown"
 
-        Log.d(TAG, "TODO: Handle Noise handshake step $step from $peerID (${packet.payload.size} bytes)")
+        Log.d(TAG, "Processing Noise handshake step $step from $peerID (${packet.payload.size} bytes)")
         
-        // For now, just treat it as a key exchange for compatibility
+        // Skip our own handshake messages
-        return handleKeyExchange(routed)
+        if (peerID == myPeerID) return false
+        
+        if (packet.payload.isEmpty()) {
+            Log.w(TAG, "Noise handshake packet has empty payload")
+            return false
+        }
+        
+        // Prevent duplicate handshake processing
+        val exchangeKey = "$peerID-${packet.payload.sliceArray(0 until minOf(16, packet.payload.size)).contentHashCode()}"
+        
+        if (processedKeyExchanges.contains(exchangeKey)) {
+            Log.d(TAG, "Already processed handshake: $exchangeKey")
+            return false
+        }
+        
+        processedKeyExchanges.add(exchangeKey)
+        
+        try {
+            // Process the Noise handshake through the delegate (NoiseEncryptionService)
+            val success = delegate?.processNoiseHandshake(peerID, packet.payload, step == 1) ?: false
+            
+            if (success) {
+                Log.d(TAG, "Successfully processed Noise handshake step $step from $peerID")
+                
+                // Notify delegate
+                delegate?.onKeyExchangeCompleted(peerID, packet.payload, routed.relayAddress)
+                
+                return true
+            } else {
+                Log.w(TAG, "Failed to process Noise handshake from $peerID")
+                return false
+            }
+            
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to process Noise handshake from $peerID: ${e.message}")
+            return false
+        }
     }
     
     /**
@@ -333,4 +369,5 @@ class SecurityManager(private val encryptionService: EncryptionService, private
  */
 interface SecurityManagerDelegate {
     fun onKeyExchangeCompleted(peerID: String, peerPublicKeyData: ByteArray, receivedAddress: String?)
+    fun processNoiseHandshake(peerID: String, payload: ByteArray, isInitiation: Boolean): Boolean
 }

app/src/main/java/com/bitchat/android/protocol/BinaryProtocol.kt

@@ -80,6 +80,8 @@ data class BitchatPacket(
     var ttl: UByte
 ) : Parcelable {
 
+    // Secondary constructor removed to enforce ByteArray usage for peerIDs
+    /*
     constructor(
         type: UByte,
         ttl: UByte,
@@ -95,6 +97,7 @@ data class BitchatPacket(
         signature = null,
         ttl = ttl
     )
+    */
 
     fun toBinaryData(): ByteArray? {
         return BinaryProtocol.encode(this)

app/src/main/java/com/bitchat/android/util/ByteArrayExtensions.kt

@@ -0,0 +1,8 @@
+package com.bitchat.android.util
+
+/**
+ * Extension function to convert a ByteArray to a hexadecimal string.
+ */
+fun ByteArray.toHexString(): String {
+    return this.joinToString("") { "%02x".format(it) }
+}

app/src/main/java/com/bitchat/android/util/ByteArrayWrapper.kt

@@ -0,0 +1,26 @@
+package com.bitchat.android.util
+
+import java.util.Arrays
+
+/**
+ * A wrapper class for ByteArray to allow it to be used as a key in HashMaps.
+ * The default ByteArray does not override equals() and hashCode() based on content.
+ *
+ * @param bytes The byte array to wrap.
+ */
+data class ByteArrayWrapper(val bytes: ByteArray) {
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+        other as ByteArrayWrapper
+        return Arrays.equals(bytes, other.bytes)
+    }
+
+    override fun hashCode(): Int {
+        return Arrays.hashCode(bytes)
+    }
+
+    fun toHexString(): String {
+        return bytes.joinToString("") { "%02x".format(it) }
+    }
+}