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fix(android): remove 0x prefix from messageHash before TSS sign 

TSS native library expects pure hex string without 0x prefix.
Fix both startSigning (initiator) and executeSignAsJoiner (joiner) functions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
hailin 2026-01-01 22:04:18 -08:00
parent 0bd764e1d1
commit 001f0ac480
1 changed files with 17 additions and 3 deletions
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20
backend/mpc-system/services/service-party-android/app/src/main/java/com/durian/tssparty/data/repository/TssRepository.kt
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@ -1216,6 +1216,13 @@ class TssRepository @Inject constructor(
android.util.Log.d("TssRepository", "Starting TSS sign with ${allParticipants.size} participants, thresholdT=$thresholdT")
// Start TSS sign
// Remove 0x prefix from messageHash - TSS library expects pure hex
val cleanMessageHash = if (messageHash.startsWith("0x") || messageHash.startsWith("0X")) {
messageHash.substring(2)
} else {
messageHash
}
android.util.Log.d("TssRepository", "Starting TSS sign with cleanMessageHash=${cleanMessageHash.take(20)}...")
val startResult = tssNativeBridge.startSign(
sessionId = sessionId,
partyId = partyId,
@ -1223,7 +1230,7 @@ class TssRepository @Inject constructor(
thresholdT = thresholdT,
thresholdN = shareEntity.thresholdN, // Use original N from keygen
participants = allParticipants,
messageHash = messageHash,
messageHash = cleanMessageHash,
shareData = shareEntity.encryptedShare,
password = password
)
@ -2158,7 +2165,14 @@ class TssRepository @Inject constructor(
}
// Start TSS sign
android.util.Log.d("TssRepository", "[CO-SIGN] Calling tssNativeBridge.startSign...")
// Remove 0x prefix from messageHash - TSS library expects pure hex
val rawMessageHash = session.messageHash ?: ""
val cleanMessageHash = if (rawMessageHash.startsWith("0x") || rawMessageHash.startsWith("0X")) {
rawMessageHash.substring(2)
} else {
rawMessageHash
}
android.util.Log.d("TssRepository", "[CO-SIGN] Calling tssNativeBridge.startSign with cleanMessageHash=${cleanMessageHash.take(20)}...")
val startResult = tssNativeBridge.startSign(
sessionId = sessionId,
partyId = partyId,
@ -2166,7 +2180,7 @@ class TssRepository @Inject constructor(
thresholdT = session.thresholdT,
thresholdN = shareEntity.thresholdN,
participants = session.participants,
messageHash = session.messageHash ?: "",
messageHash = cleanMessageHash,
shareData = shareEntity.encryptedShare,
password = password
)