1 files changed, 11 insertions, 3 deletions
diff --git a/packages/taler-wallet-webextension/src/wxApi.ts b/packages/taler-wallet-webextension/src/wxApi.ts
index ce1dac14f..46c9f1b2d 100644
--- a/packages/taler-wallet-webextension/src/wxApi.ts
+++ b/packages/taler-wallet-webextension/src/wxApi.ts
@@ -24,9 +24,11 @@
 import {
   AbsoluteTime,
   CoreApiResponse,
+  DetailsMap,
   Logger,
   LogLevel,
   NotificationType,
+  TalerError,
   TalerErrorCode,
   TalerErrorDetail,
   WalletDiagnostics,
@@ -92,13 +94,19 @@ export interface BackgroundApiClient {
   ): Promise<BackgroundOperations[Op]["response"]>;
 }
 
-export class BackgroundError extends Error {
-  public errorDetail: TalerErrorDetail;
+export class BackgroundError<T = any> extends Error {
+  public errorDetail: TalerErrorDetail & T;
 
-  constructor(title: string, e: TalerErrorDetail) {
+  constructor(title: string, e: TalerErrorDetail & T) {
     super(title);
     this.errorDetail = e;
   }
+
+  hasErrorCode<C extends keyof DetailsMap>(
+    code: C,
+  ): this is BackgroundError<DetailsMap[C]> {
+    return this.errorDetail.code === code;
+  }
 }
 
 /**