refactor frombinarydata

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

@@ -10,8 +10,6 @@ import com.bitchat.android.protocol.BitchatPacket
 import com.bitchat.android.protocol.MessageType
 import com.bitchat.android.util.toHexString
 import kotlinx.coroutines.*
-import org.json.JSONObject
-import java.security.MessageDigest
 import java.util.*
 import kotlin.random.Random
 
@@ -121,7 +119,7 @@ class MessageHandler(private val myPeerID: String) {
         
         try {
             // Parse the identity announcement
-            val announcement = parseNoiseIdentityAnnouncement(packet.payload)
+            val announcement = NoiseIdentityAnnouncement.fromBinaryData(packet.payload)
             if (announcement == null) {
                 Log.w(TAG, "Failed to parse Noise identity announcement from $peerID")
                 return
@@ -406,45 +404,6 @@ 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
-        }
-    }
-    
     /**
      * Convert hex string peer ID to binary data (8 bytes) - same as iOS implementation
      */

app/src/main/java/com/bitchat/android/model/NoiseIdentityAnnouncement.kt

@@ -1,5 +1,8 @@
 package com.bitchat.android.model
 
+import android.util.Log
+import org.json.JSONObject
+import java.security.MessageDigest
 import java.util.*
 
 /**
@@ -41,4 +44,47 @@ data class NoiseIdentityAnnouncement(
         result = 31 * result + (previousPeerID?.hashCode() ?: 0)
         return result
     }
+    
+    companion object {
+        private const val TAG = "NoiseIdentityAnnouncement"
+        
+        /**
+         * Parse Noise identity announcement from binary payload
+         */
+        fun fromBinaryData(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
+            }
+        }
+    }
 }