diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 790823bd..624c76ed 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -556,7 +556,8 @@
       "Bash(adb logcat:*)",
       "Bash(git commit -m \"$\\(cat <<''EOF''\nfeat\\(android\\): add 5-minute polling timeout mechanism for keygen/sign\n\nImplements Electron''s checkAndTriggerKeygen\\(\\) polling fallback:\n- Adds polling every 2 seconds with 5-minute timeout\n- Triggers keygen/sign via synthetic session_started event on in_progress status\n- Handles gRPC stream disconnection when app goes to background\n- Shows timeout error in UI via existing error mechanism\n\n🤖 Generated with [Claude Code]\\(https://claude.com/claude-code\\)\n\nCo-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>\nEOF\n\\)\")",
       "Bash(go list:*)",
-      "Bash(adb install:*)"
+      "Bash(adb install:*)",
+      "Bash(git commit -m \"$\\(cat <<''EOF''\nfeat\\(tss\\): add real-time round progress from msg.Type\\(\\) parsing\n\nExtract current round number from tss-lib message type string using\nregex pattern `Round\\(\\\\d+\\)`. This enables real-time progress updates\n\\(1/4, 2/4... for keygen, 1/9, 2/9... for signing\\) instead of only\nshowing completion status.\n\nChanges across all three platforms:\n- tss-wasm/main.go: Add extractRoundFromMessageType\\(\\) and call\n  OnProgress with parsed round on each outgoing message\n- service-party-android/tsslib/tsslib.go: Same implementation for\n  Android gomobile binding\n- service-party-app/tss-party/main.go: Same implementation for\n  Electron subprocess, with isKeygen parameter to distinguish\n  keygen \\(4 rounds\\) vs signing \\(9 rounds\\)\n\nSafe fallback: Returns 0 if parsing fails, which doesn''t affect\nprotocol execution - only UI display.\n\n🤖 Generated with [Claude Code]\\(https://claude.com/claude-code\\)\n\nCo-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>\nEOF\n\\)\")"
     ],
     "deny": [],
     "ask": []
diff --git a/backend/mpc-system/services/service-party-android/app/src/main/java/com/durian/tssparty/data/repository/TssRepository.kt b/backend/mpc-system/services/service-party-android/app/src/main/java/com/durian/tssparty/data/repository/TssRepository.kt
index 8115b911..bd42591e 100644
--- a/backend/mpc-system/services/service-party-android/app/src/main/java/com/durian/tssparty/data/repository/TssRepository.kt
+++ b/backend/mpc-system/services/service-party-android/app/src/main/java/com/durian/tssparty/data/repository/TssRepository.kt
@@ -2259,20 +2259,43 @@ class TssRepository @Inject constructor(
     ): Result<String> {
         return withContext(Dispatchers.IO) {
             try {
-                // Parse signature (format: 0x + r(64) + s(64) + v(2))
-                val sigHex = signature.removePrefix("0x")
-                if (sigHex.length != 130) {
-                    return@withContext Result.failure(Exception("Invalid signature length"))
+                android.util.Log.d("TssRepository", "[BROADCAST] Input signature: ${signature.take(40)}...")
+                android.util.Log.d("TssRepository", "[BROADCAST] Signature length: ${signature.length}")
+
+                // Signature from TSS is Base64 encoded, need to decode and convert to hex
+                // Format after decode: r (32 bytes) + s (32 bytes) + v (1 byte) = 65 bytes
+                val sigBytes = try {
+                    android.util.Base64.decode(signature, android.util.Base64.NO_WRAP)
+                } catch (e: Exception) {
+                    // If not Base64, try to parse as hex directly
+                    android.util.Log.d("TssRepository", "[BROADCAST] Not Base64, trying hex...")
+                    signature.removePrefix("0x").hexToByteArray()
                 }
 
-                val rHex = sigHex.substring(0, 64)
-                val sHex = sigHex.substring(64, 128)
-                val vHex = sigHex.substring(128, 130)
+                android.util.Log.d("TssRepository", "[BROADCAST] Decoded signature bytes: ${sigBytes.size}")
 
-                val r = rHex.hexToByteArray()
-                val s = sHex.hexToByteArray()
-                val v = vHex.toInt(16)
-                val recoveryId = if (v >= 27) v - 27 else v
+                if (sigBytes.size != 65) {
+                    return@withContext Result.failure(Exception("Invalid signature length: ${sigBytes.size} bytes, expected 65"))
+                }
+
+                // Extract r, s, v from decoded bytes
+                val rBytes = sigBytes.copyOfRange(0, 32)
+                val sBytes = sigBytes.copyOfRange(32, 64)
+                val vByte = sigBytes[64].toInt() and 0xFF
+
+                // Convert to hex for logging
+                val rHex = rBytes.joinToString("") { "%02x".format(it) }
+                val sHex = sBytes.joinToString("") { "%02x".format(it) }
+
+                android.util.Log.d("TssRepository", "[BROADCAST] r: ${rHex.take(16)}...")
+                android.util.Log.d("TssRepository", "[BROADCAST] s: ${sHex.take(16)}...")
+                android.util.Log.d("TssRepository", "[BROADCAST] v: $vByte")
+
+                val recoveryId = if (vByte >= 27) vByte - 27 else vByte
+
+                // Use byte arrays directly for finalizeTransaction
+                val r = rBytes
+                val s = sBytes
 
                 // Finalize transaction with signature
                 val signedTx = TransactionUtils.finalizeTransaction(