1 files changed, 31 insertions, 1 deletions
diff --git a/packages/taler-harness/src/harness/harness.ts b/packages/taler-harness/src/harness/harness.ts
index 7b2f980cc..1120eae84 100644
--- a/packages/taler-harness/src/harness/harness.ts
+++ b/packages/taler-harness/src/harness/harness.ts
@@ -41,17 +41,21 @@ import {
   Logger,
   MerchantReserveCreateConfirmation,
   MerchantTemplateAddDetails,
+  NotificationType,
   parsePaytoUri,
   stringToBytes,
   TalerError,
   TalerProtocolDuration,
+  TransactionMajorState,
   WalletNotification,
 } from "@gnu-taler/taler-util";
 import {
   BankApi,
   BankServiceHandle,
   HarnessExchangeBankAccount,
+  OpenedPromise,
   openPromise,
+  WalletApiOperation,
   WalletCoreApiClient,
   WalletCoreRequestType,
   WalletCoreResponseType,
@@ -934,7 +938,12 @@ export class FakebankService
     );
     await this.pingUntilAvailable();
     for (const acc of this.accounts) {
-      await BankApi.registerAccount(this, acc.accountName, acc.accountPassword, {});
+      await BankApi.registerAccount(
+        this,
+        acc.accountName,
+        acc.accountPassword,
+        {},
+      );
     }
   }
 
@@ -2246,9 +2255,26 @@ export interface WalletClientArgs {
   onNotification?(n: WalletNotification): void;
 }
 
+export type CancelFn = () => void;
+export type NotificationHandler = (n: WalletNotification) => void;
+
+/**
+ * Convenience wrapper around a (remote) wallet handle.
+ */
 export class WalletClient {
   remoteWallet: RemoteWallet | undefined = undefined;
   private waiter: WalletNotificationWaiter = makeNotificationWaiter();
+  notificationHandlers: NotificationHandler[] = [];
+
+  addNotificationListener(f: NotificationHandler): CancelFn {
+    this.notificationHandlers.push(f);
+    return () => {
+      const idx = this.notificationHandlers.indexOf(f);
+      if (idx >= 0) {
+        this.notificationHandlers.splice(idx, 1);
+      }
+    };
+  }
 
   async call<Op extends keyof WalletOperations>(
     operation: Op,
@@ -2260,6 +2286,7 @@ export class WalletClient {
     const client = getClientFromRemoteWallet(this.remoteWallet);
     return client.call(operation, payload);
   }
+
   constructor(private args: WalletClientArgs) {}
 
   async connect(): Promise<void> {
@@ -2272,6 +2299,9 @@ export class WalletClient {
           walletClient.args.onNotification(n);
         }
         waiter.notify(n);
+        for (const h of walletClient.notificationHandlers) {
+          h(n);
+        }
       },
     });
     this.remoteWallet = w;