fix: polish trezor reliability and ux

.cursor/rules/rules.main.mdc

@@ -19,7 +19,7 @@ alwaysApply: true
 - use official kotlin code guide
 - always use trailing commas in parameters list, except after modifiers parameter
 - when invoking any composable function, always pass the modifier argument last in the call, sse named parameters if needed to ensure this order, and omit trailing commas after it.
-- never modify `strings.xml`
+- English source copy may be updated in `app/src/main/res/values/strings.xml`; never edit localized `values-*/strings.xml` files directly
 - always keep compose preview at end of file
 - split screen composables into stateful wrapper parent and stateless child which can be rendered in the previews.
 - wrap previews in `AppThemeSurface` composable, and name them simple, like `Preview`, `Preview2`.

app/src/main/java/to/bitkit/ext/TrezorExceptionExt.kt

@@ -11,3 +11,10 @@ fun Throwable.isTrezorUserCancellation(): Boolean =
 
 fun Throwable.isTrezorDeviceBusy(): Boolean =
     generateSequence(this) { it.cause }.any { it is TrezorException.DeviceBusy }
+
+fun Throwable.isTrezorLockedOrBusy(): Boolean =
+    isTrezorDeviceBusy() ||
+        generateSequence(this) { it.cause }.any {
+            val message = it.message.orEmpty()
+            "Device error (code 99)" in message && "Firmware error" in message
+        }

app/src/main/java/to/bitkit/models/HardwareWallet.kt

@@ -65,6 +65,13 @@ data class HwFundingTransaction(
     val satsPerVByte: ULong,
 )
 
+data class HwFundingSignedTx(
+    val serializedTx: String,
+    val miningFeeSats: ULong,
+    val feeRate: ULong,
+    val totalSpent: ULong,
+)
+
 data class HwFundingBroadcastResult(
     val txId: String,
     val miningFeeSats: ULong,

app/src/main/java/to/bitkit/repositories/HwWalletRepo.kt

@@ -41,6 +41,7 @@ import to.bitkit.ext.timestamp
 import to.bitkit.models.HwFundingAccount
 import to.bitkit.models.HwFundingAddressType
 import to.bitkit.models.HwFundingBroadcastResult
+import to.bitkit.models.HwFundingSignedTx
 import to.bitkit.models.HwFundingTransaction
 import to.bitkit.models.HwWallet
 import to.bitkit.models.HwWalletReceivedTx
@@ -128,6 +129,9 @@ class HwWalletRepo @Inject constructor(
     /** Pairing-code request raised by the device during connect; the UI shows the Pair Device sheet. */
     val needsPairingCode = trezorRepo.needsPairingCode
 
+    /** Identity of the active request, incremented for each pairing-code callback. */
+    val pairingCodeRequestId = trezorRepo.pairingCodeRequestId
+
     fun submitPairingCode(code: String) = trezorRepo.submitPairingCode(code)
 
     fun cancelPairingCode() = trezorRepo.cancelPairingCode()
@@ -219,11 +223,11 @@ class HwWalletRepo @Inject constructor(
         }
     }
 
-    /** Signs a composed funding payment on the Trezor and broadcasts it. */
-    suspend fun signAndBroadcastFunding(
+    /** Signs a composed funding payment on the Trezor. */
+    suspend fun signFunding(
         deviceId: String,
         funding: HwFundingTransaction,
-    ): Result<HwFundingBroadcastResult> = withContext(ioDispatcher) {
+    ): Result<HwFundingSignedTx> = withContext(ioDispatcher) {
         runSuspendCatching {
             val signed = runSuspendCatching {
                 trezorRepo.signTxFromPsbt(
@@ -237,16 +241,31 @@ class HwWalletRepo @Inject constructor(
                     trezorRepo.disconnectStaleSession(deviceId)
                 }
             }
-            val txId = trezorRepo.broadcastRawTx(serializedTx = signed.getOrThrow().serializedTx).getOrThrow()
-            HwFundingBroadcastResult(
-                txId = txId,
+            val signedTx = signed.getOrThrow()
+            HwFundingSignedTx(
+                serializedTx = signedTx.serializedTx,
                 miningFeeSats = funding.miningFeeSats,
                 feeRate = ceil(funding.feeRate.toDouble()).toULong(),
                 totalSpent = funding.totalSpent,
             )
         }
     }
 
+    /** Broadcasts a signed funding payment without requiring the hardware device. */
+    suspend fun broadcastFunding(
+        signedTx: HwFundingSignedTx,
+    ): Result<HwFundingBroadcastResult> = withContext(ioDispatcher) {
+        runSuspendCatching {
+            val txId = trezorRepo.broadcastRawTx(serializedTx = signedTx.serializedTx).getOrThrow()
+            HwFundingBroadcastResult(
+                txId = txId,
+                miningFeeSats = signedTx.miningFeeSats,
+                feeRate = signedTx.feeRate,
+                totalSpent = signedTx.totalSpent,
+            )
+        }
+    }
+
     suspend fun disconnectStaleSession(deviceId: String): Result<Unit> = trezorRepo.disconnectStaleSession(deviceId)
 
     /**

app/src/main/java/to/bitkit/repositories/TrezorRepo.kt

@@ -38,7 +38,6 @@ import kotlinx.coroutines.Job
 import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.TimeoutCancellationException
 import kotlinx.coroutines.delay
-import kotlinx.coroutines.withTimeout
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharedFlow
@@ -52,16 +51,19 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import kotlinx.coroutines.withContext
+import kotlinx.coroutines.withTimeout
 import to.bitkit.data.HwWalletStore
 import to.bitkit.data.SettingsStore
 import to.bitkit.di.IoDispatcher
 import to.bitkit.env.Env
 import to.bitkit.ext.isTrezorDeviceBusy
+import to.bitkit.ext.isTrezorLockedOrBusy
 import to.bitkit.ext.isTrezorUserCancellation
 import to.bitkit.ext.nowMs
 import to.bitkit.ext.runSuspendCatching
 import to.bitkit.ext.toTransportType
 import to.bitkit.models.ALL_ADDRESS_TYPES
+import to.bitkit.models.HwWalletId
 import to.bitkit.models.KnownDevice
 import to.bitkit.models.TransportType
 import to.bitkit.models.toAccountDerivationPath
@@ -77,7 +79,6 @@ import to.bitkit.utils.AppError
 import to.bitkit.utils.Logger
 import to.bitkit.utils.TrezorErrorPresenter
 import java.io.File
-import to.bitkit.models.HwWalletId
 import javax.inject.Inject
 import javax.inject.Singleton
 import kotlin.time.Clock
@@ -152,6 +153,9 @@ class TrezorRepo @Inject constructor(
      */
     val needsPairingCode = trezorTransport.needsPairingCode
 
+    /** Identity of the active pairing-code request; changes for every transport callback. */
+    val pairingCodeRequestId = trezorTransport.pairingCodeRequestId
+
     /**
      * Submit the pairing code entered by the user.
      */
@@ -716,13 +720,27 @@ class TrezorRepo @Inject constructor(
     }
 
     suspend fun ensureConnected(deviceId: String): Result<TrezorFeatures> = withContext(ioDispatcher) {
-        awaitConnectedOrNull(deviceId)?.let { return@withContext Result.success(it) }
-        if (isKnownBluetoothDevice(deviceId)) {
-            return@withContext reconnectKnownBluetoothDevice(deviceId)
+        val result = awaitConnectedOrNull(deviceId)?.let { Result.success(it) } ?: run {
+            if (isKnownBluetoothDevice(deviceId)) {
+                reconnectKnownBluetoothDevice(deviceId)
+            } else {
+                connectKnownDevice(deviceId, forceSession = true)
+            }
         }
-        connectKnownDevice(deviceId, forceSession = true)
+        result.requireUnlocked()
     }
 
+    private fun Result<TrezorFeatures>.requireUnlocked(): Result<TrezorFeatures> = fold(
+        onSuccess = {
+            if (it.pinProtection == true && it.unlocked == false) {
+                Result.failure(TrezorException.DeviceBusy())
+            } else {
+                Result.success(it)
+            }
+        },
+        onFailure = { Result.failure(it) },
+    )
+
     /**
      * BLE Trezors often need a few seconds to advertise again after unlock, so retry
      * with growing delays (same cadence as [retryAutoReconnect]) instead of failing on
@@ -876,8 +894,7 @@ class TrezorRepo @Inject constructor(
                 gapLimit = gapLimit,
             )
             trezorService.startWatcher(params, eventBridge)
-            TrezorDebugLog.log(WATCHER_TAG, "Started watcher '$watcherId' for '${extendedKey.take(12)}...'")
-            Logger.info("Started watcher '$watcherId'", context = TAG)
+            TrezorDebugLog.log(WATCHER_TAG, "Started watcher '$watcherId'")
         }.onFailure {
             Logger.error("Start watcher failed", it, context = TAG)
             _state.update { s -> s.copy(error = trezorErrorMessage(it)) }
@@ -889,7 +906,6 @@ class TrezorRepo @Inject constructor(
             awaitSetup()
             trezorService.stopWatcher(watcherId)
             TrezorDebugLog.log(WATCHER_TAG, "Stopped watcher '$watcherId'")
-            Logger.info("Stopped watcher '$watcherId'", context = TAG)
         }.onFailure {
             Logger.error("Stop watcher failed", it, context = TAG)
             _state.update { s -> s.copy(error = trezorErrorMessage(it)) }
@@ -1234,7 +1250,7 @@ class TrezorRepo @Inject constructor(
     }
 
     private fun trezorErrorMessage(error: Throwable): String? =
-        if (error.isTrezorDeviceBusy()) {
+        if (error.isTrezorLockedOrBusy()) {
             TrezorErrorPresenter.userMessage(context, error)
         } else {
             error.message

app/src/main/java/to/bitkit/services/TrezorDebugLog.kt

@@ -7,20 +7,27 @@ import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.update
+import to.bitkit.utils.Logger
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
 
 object TrezorDebugLog {
+    private const val TAG = "TrezorDebugLog"
     private const val MAX_LINES = 300
+    private val secretValuePattern = Regex(
+        """(?i)\b(mnemonic|seed|passphrase|pin|pairing[ _-]?code|credential|xpub|extended[ _-]?key|psbt|""" +
+            """raw[ _-]?tx|serialized[ _-]?tx)\s*[:=]\s*("[^"]*"|'[^']*'|[^\s,;]+)""",
+    )
     private val _lines = MutableStateFlow<ImmutableList<String>>(persistentListOf())
     val lines: StateFlow<ImmutableList<String>> = _lines.asStateFlow()
 
     private val fmt = SimpleDateFormat("HH:mm:ss.SSS", Locale.US)
 
     fun log(tag: String, msg: String) {
-        val ts = fmt.format(Date())
-        val line = "$ts [$tag] $msg"
+        val sanitizedMessage = secretValuePattern.replace(msg) { "${it.groupValues[1]}=<redacted>" }
+        val ts = synchronized(fmt) { fmt.format(Date()) }
+        val line = "$ts [$tag] $sanitizedMessage"
         _lines.update { current ->
             val updated = current + line
             if (updated.size > MAX_LINES) {
@@ -29,6 +36,7 @@ object TrezorDebugLog {
                 updated.toImmutableList()
             }
         }
+        Logger.debug("Recorded Trezor diagnostic '$tag': '$sanitizedMessage'", context = TAG)
     }
 
     fun clear() {