Fixed crash signing via wc

app/src/main/res/navigation/external_sign_graph.xml

@@ -9,7 +9,6 @@
         android:id="@+id/ConfirmSignExtrinsicFragment"
         android:name="io.novafoundation.nova.feature_external_sign_impl.presentation.signExtrinsic.ExternalSignFragment"
         android:label="ConfirmSignExtrinsicFragment"
-        app:useAdd="true"
         tools:layout="@layout/fragment_confirm_sign_extrinsic">
 
         <action

build.gradle

@@ -1,8 +1,8 @@
 buildscript {
     ext {
         // App version
-        versionName = '9.2.3'
-        versionCode = 174
+        versionName = '9.2.4'
+        versionCode = 175
 
         applicationId = "io.novafoundation.nova"
         releaseApplicationSuffix = "market"

feature-ledger-impl/src/main/java/io/novafoundation/nova/feature_ledger_impl/sdk/discovery/CompoundLedgerDiscoveryService.kt

@@ -10,6 +10,8 @@ class CompoundLedgerDiscoveryService(
     private val delegates: List<LedgerDeviceDiscoveryService>
 ) : LedgerDeviceDiscoveryService {
 
+    private var discoveringSubscribersManager = DiscoveringSubscribersManager()
+
     constructor(vararg delegates: LedgerDeviceDiscoveryService) : this(delegates.toList())
 
     override val discoveredDevices: Flow<List<LedgerDevice>> by lazy {
@@ -26,10 +28,37 @@ class CompoundLedgerDiscoveryService(
     }
 
     override fun startDiscovery() {
-        delegates.forEach { it.startDiscovery() }
+        if (discoveringSubscribersManager.noSubscribers()) {
+            delegates.forEach { it.startDiscovery() }
+        }
+
+        discoveringSubscribersManager.addSubscriber()
     }
 
     override fun stopDiscovery() {
-        delegates.forEach { it.stopDiscovery() }
+        discoveringSubscribersManager.removeSubscriber()
+
+        if (discoveringSubscribersManager.noSubscribers()) {
+            delegates.forEach { it.stopDiscovery() }
+        }
+    }
+}
+
+private class DiscoveringSubscribersManager {
+
+    private var subscribers = 0
+
+    fun addSubscriber() {
+        subscribers++
+    }
+
+    fun removeSubscriber() {
+        if (subscribers == 0) return
+
+        subscribers--
+    }
+
+    fun noSubscribers(): Boolean {
+        return subscribers == 0
     }
 }