1 files changed, 5 insertions, 0 deletions
diff --git a/wallet/src/main/java/net/taler/wallet/backend/BackendManager.kt b/wallet/src/main/java/net/taler/wallet/backend/BackendManager.kt
index ae338e8..b2f1f10 100644
--- a/wallet/src/main/java/net/taler/wallet/backend/BackendManager.kt
+++ b/wallet/src/main/java/net/taler/wallet/backend/BackendManager.kt
@@ -22,6 +22,7 @@ import kotlinx.serialization.json.Json
 import net.taler.qtart.TalerWalletCore
 import net.taler.wallet.BuildConfig
 import org.json.JSONObject
+import java.util.concurrent.atomic.AtomicBoolean
 import kotlin.coroutines.resume
 import kotlin.coroutines.suspendCoroutine
 
@@ -40,12 +41,16 @@ class BackendManager(
         val json = Json {
             ignoreUnknownKeys = true
         }
+        @JvmStatic
+        private val initialized = AtomicBoolean(false)
     }
 
     private val walletCore = TalerWalletCore()
     private val requestManager = RequestManager()
 
     init {
+        // TODO using Dagger/Hilt and @Singleton would be nice as well
+        if (initialized.getAndSet(true)) error("Already initialized")
         walletCore.setMessageHandler { onMessageReceived(it) }
         if (BuildConfig.DEBUG) walletCore.setStdoutHandler {
             Log.d(TAG_CORE, it)