Add E2EE diagnostic logging for debugging call encryption

- Enable diag file for all builds (was DEBUG-only)
- Add native frame count + bad streak query methods (JNI)
- Add periodic E2EE-HEALTH log with enc/dec frame counts
- Reduce scan receivers spam (only log on state change)
- Log E2EE state on call connected
- Log when attachSender/attachReceiver skips due to missing key

app/src/main/cpp/rosetta_e2ee.cpp

@@ -531,6 +531,7 @@ public:
     }
 
     uint32_t KeyFingerprint() const { return key_fingerprint_; }
+    int FrameCount() const { return diag_count_.load(std::memory_order_relaxed); }
 
     /* ── RefCountInterface ─────────────────────────────────────── */
     void AddRef() const override {
@@ -724,6 +725,8 @@ public:
     }
 
     uint32_t KeyFingerprint() const { return key_fingerprint_; }
+    int FrameCount() const { return diag_count_.load(std::memory_order_relaxed); }
+    uint32_t BadStreak() const { return bad_audio_streak_.load(std::memory_order_relaxed); }
 
     /* ── RefCountInterface ─────────────────────────────────────── */
     void AddRef() const override {
@@ -1121,4 +1124,33 @@ Java_com_rosetta_messenger_network_XChaCha20E2EE_nativeCloseDiagFile(
     }
 }
 
+/* ── Query frame counts for health checks ────────────────────── */
+
+JNIEXPORT jint JNICALL
+Java_com_rosetta_messenger_network_XChaCha20E2EE_nativeGetEncryptorFrameCount(
+        JNIEnv *, jclass, jlong ptr)
+{
+    if (ptr == 0) return -1;
+    auto *enc = reinterpret_cast<XChaCha20Encryptor *>(ptr);
+    return enc->FrameCount();
+}
+
+JNIEXPORT jint JNICALL
+Java_com_rosetta_messenger_network_XChaCha20E2EE_nativeGetDecryptorFrameCount(
+        JNIEnv *, jclass, jlong ptr)
+{
+    if (ptr == 0) return -1;
+    auto *dec = reinterpret_cast<XChaCha20Decryptor *>(ptr);
+    return dec->FrameCount();
+}
+
+JNIEXPORT jint JNICALL
+Java_com_rosetta_messenger_network_XChaCha20E2EE_nativeGetDecryptorBadStreak(
+        JNIEnv *, jclass, jlong ptr)
+{
+    if (ptr == 0) return -1;
+    auto *dec = reinterpret_cast<XChaCha20Decryptor *>(ptr);
+    return dec->BadStreak();
+}
+
 } /* extern "C" */

app/src/main/java/com/rosetta/messenger/network/CallManager.kt

@@ -736,6 +736,9 @@ object CallManager {
 
     private fun onCallConnected() {
         appContext?.let { CallSoundManager.play(it, CallSoundManager.CallSound.CONNECTED) }
+        val keyFp = sharedKeyBytes?.fingerprintHex(8) ?: "null"
+        breadcrumb("CONNECTED: e2eeAvail=$e2eeAvailable keyFp=$keyFp sEnc=${senderEncryptors.size} rDec=${receiverDecryptors.size} nativeLoaded=${XChaCha20E2EE.nativeLoaded}")
+        breadcrumbState("onCallConnected")
         updateState { it.copy(phase = CallPhase.ACTIVE, statusText = "Call active") }
         durationJob?.cancel()
         durationJob =
@@ -832,6 +835,9 @@ object CallManager {
         emitCallAttachmentIfNeeded(snapshot)
         resetRtcObjects()
         e2eeAvailable = true
+        lastScanLog = ""
+        lastHealthLog = ""
+        healthLogCount = 0
         role = null
         roomId = ""
         offerSent = false
@@ -893,14 +899,15 @@ object CallManager {
         }
         sharedKeyBytes = keyBytes.copyOf(32)
         breadcrumb("KE: shared key fp=${sharedKeyBytes?.fingerprintHex(8)}")
-        // Frame-level diagnostics are enabled only for debug builds.
-        if (BuildConfig.DEBUG) {
+        // Enable frame-level diagnostics for all builds (needed for debugging E2EE issues).
         try {
             val dir = java.io.File(appContext!!.filesDir, "crash_reports")
             if (!dir.exists()) dir.mkdirs()
             val diagPath = java.io.File(dir, "e2ee_diag.txt").absolutePath
             XChaCha20E2EE.nativeOpenDiagFile(diagPath)
-            } catch (_: Throwable) {}
+            breadcrumb("E2EE: diag file opened at $diagPath")
+        } catch (t: Throwable) {
+            breadcrumb("E2EE: diag file open FAILED: ${t.message}")
         }
         // If sender track already exists, bind encryptor now.
         val existingSender =
@@ -916,8 +923,13 @@ object CallManager {
         Log.i(TAG, "E2EE key ready (XChaCha20)")
     }
 
+    private var lastHealthLog = ""
+    private var healthLogCount = 0
+
     private fun startE2EERebindLoopIfNeeded() {
         if (e2eeRebindJob?.isActive == true) return
+        healthLogCount = 0
+        lastHealthLog = ""
         e2eeRebindJob =
             scope.launch {
                 while (true) {
@@ -934,9 +946,29 @@ object CallManager {
                         attachSenderE2EE(sender)
                     }
                     attachReceiverE2EEFromPeerConnection()
+                    // Periodic health check: log frame counts from native
+                    healthLogCount++
+                    if (healthLogCount % 4 == 0) { // every ~6s
+                        logE2EEHealth()
                     }
                 }
             }
+    }
+
+    private fun logE2EEHealth() {
+        val encFrames = senderEncryptors.values.firstOrNull()?.frameCount() ?: -1
+        val decFrames = receiverDecryptors.values.firstOrNull()?.frameCount() ?: -1
+        val badStreak = receiverDecryptors.values.firstOrNull()?.badStreak() ?: -1
+        val keyFp = sharedKeyBytes?.fingerprintHex(8) ?: "null"
+        val health = "enc=$encFrames dec=$decFrames bad=$badStreak keyFp=$keyFp sEnc=${senderEncryptors.size} rDec=${receiverDecryptors.size}"
+        // Only log if state changed or every 5th iteration to avoid spam
+        if (health != lastHealthLog || healthLogCount % 20 == 0) {
+            breadcrumb("E2EE-HEALTH: $health")
+            lastHealthLog = health
+        }
+    }
+
+    private var lastScanLog = ""
 
     private fun attachReceiverE2EEFromPeerConnection() {
         val pc = peerConnection ?: return
@@ -956,7 +988,12 @@ object CallManager {
                     fromTransceivers++
                 }
             }
-            breadcrumb("E2EE: scan receivers attached recv=$fromReceivers tx=$fromTransceivers totalMap=${receiverDecryptors.size}")
+            val hasKey = sharedKeyBytes != null
+            val scanLog = "recv=$fromReceivers tx=$fromTransceivers totalMap=${receiverDecryptors.size} hasKey=$hasKey e2eeAvail=$e2eeAvailable"
+            if (scanLog != lastScanLog) {
+                breadcrumb("E2EE: scan receivers attached $scanLog")
+                lastScanLog = scanLog
+            }
         }.onFailure {
             breadcrumb("E2EE: attachReceiverE2EEFromPeerConnection failed: ${it.message}")
         }
@@ -1096,8 +1133,15 @@ object CallManager {
     }
 
     private fun attachSenderE2EE(sender: RtpSender?) {
-        if (!e2eeAvailable) return
-        val key = sharedKeyBytes ?: return
+        if (!e2eeAvailable) {
+            breadcrumb("E2EE: attachSender SKIP — e2eeAvailable=false")
+            return
+        }
+        val key = sharedKeyBytes
+        if (key == null) {
+            breadcrumb("E2EE: attachSender SKIP — sharedKeyBytes=null")
+            return
+        }
         if (sender == null) return
         val mapKey = senderMapKey(sender)
         val existing = senderEncryptors[mapKey]
@@ -1134,8 +1178,15 @@ object CallManager {
     }
 
     private fun attachReceiverE2EE(receiver: RtpReceiver?) {
-        if (!e2eeAvailable) return
-        val key = sharedKeyBytes ?: return
+        if (!e2eeAvailable) {
+            breadcrumb("E2EE: attachReceiver SKIP — e2eeAvailable=false")
+            return
+        }
+        val key = sharedKeyBytes
+        if (key == null) {
+            breadcrumb("E2EE: attachReceiver SKIP — sharedKeyBytes=null")
+            return
+        }
         if (receiver == null) return
         val mapKey = receiverMapKey(receiver)
         val existing = receiverDecryptors[mapKey]

app/src/main/java/com/rosetta/messenger/network/XChaCha20E2EE.kt

@@ -72,6 +72,8 @@ object XChaCha20E2EE {
 
         override fun getNativeFrameEncryptor(): Long = nativePtr
 
+        fun frameCount(): Int = if (nativePtr != 0L) nativeGetEncryptorFrameCount(nativePtr) else -1
+
         fun dispose() {
             if (nativePtr != 0L) nativeReleaseEncryptor(nativePtr)
         }
@@ -89,6 +91,9 @@ object XChaCha20E2EE {
 
         override fun getNativeFrameDecryptor(): Long = nativePtr
 
+        fun frameCount(): Int = if (nativePtr != 0L) nativeGetDecryptorFrameCount(nativePtr) else -1
+        fun badStreak(): Int = if (nativePtr != 0L) nativeGetDecryptorBadStreak(nativePtr) else -1
+
         fun dispose() {
             if (nativePtr != 0L) nativeReleaseDecryptor(nativePtr)
         }
@@ -99,8 +104,11 @@ object XChaCha20E2EE {
     @JvmStatic private external fun nativeHSalsa20(rawDh: ByteArray): ByteArray
     @JvmStatic private external fun nativeCreateEncryptor(key: ByteArray): Long
     @JvmStatic private external fun nativeReleaseEncryptor(ptr: Long)
+    @JvmStatic private external fun nativeGetEncryptorFrameCount(ptr: Long): Int
     @JvmStatic private external fun nativeCreateDecryptor(key: ByteArray): Long
     @JvmStatic private external fun nativeReleaseDecryptor(ptr: Long)
+    @JvmStatic private external fun nativeGetDecryptorFrameCount(ptr: Long): Int
+    @JvmStatic private external fun nativeGetDecryptorBadStreak(ptr: Long): Int
     @JvmStatic private external fun nativeInstallCrashHandler(path: String)
     @JvmStatic external fun nativeOpenDiagFile(path: String)
     @JvmStatic external fun nativeCloseDiagFile()