taler-typescript-core

commit 7f966ae5de07fabd09f9cfcf9e0d6309a378063e
parent 27d6013f31a15ccf7b582ea5b90f459757740883
Author: Florian Dold <dold@taler.net>
Date:   Wed, 29 Jul 2026 13:48:11 +0200

wallet-core: add a dev experiment that blocks order claims

Lets a test observe how the wallet retries a claim without taking the order
away from the nonce it claims with.

Issue: https://bugs.taler.net/n/11087

Diffstat:
M
packages/taler-wallet-core/src/dev-experiments.ts
 | 
29
++++++++++++++++++++++++++++-

1 file changed, 28 insertions(+), 1 deletion(-)
diff --git a/packages/taler-wallet-core/src/dev-experiments.ts b/packages/taler-wallet-core/src/dev-experiments.ts
@@ -49,6 +49,7 @@ import {
   j2s,
 } from "@gnu-taler/taler-util";
 import {
+  HeadersImpl,
   HttpRequestLibrary,
   HttpRequestOptions,
   HttpResponse,
@@ -125,6 +126,8 @@ export interface DevExperimentState {
 
   blockPayResponse?: boolean;
 
+  blockClaimResponse?: boolean;
+
   /** Migration test for confirmPay */
   flagConfirmPayNoWait?: boolean;
 
@@ -513,6 +516,12 @@ export async function applyDevExperiment(
       wex.ws.devExperimentState.blockPayResponse = val;
       return;
     }
+    case "block-claim-response": {
+      const val = getValFlag(parsedUri);
+      logger.info(`setting dev experiment blockClaimResponse=${val}`);
+      wex.ws.devExperimentState.blockClaimResponse = val;
+      return;
+    }
     case "pretend-no-denoms": {
       wex.ws.devExperimentState.pretendNoDenoms = true;
       return;
@@ -857,7 +866,13 @@ function mockResponseReplacementJson(
   };
 }
 
-function mockInternalServerError(resp: HttpResponse): HttpResponse {
+/**
+ * Fake a 500 for a request.  Takes only the request-identifying part of a
+ * response, so that a request that is never sent on can be faked as well.
+ */
+function mockInternalServerError(
+  resp: Pick<HttpResponse, "requestMethod" | "requestUrl" | "headers">,
+): HttpResponse {
   const textEncoder = new TextEncoder();
   const respJson = {
     code: TalerErrorCode.GENERIC_INTERNAL_INVARIANT_FAILURE,
@@ -942,6 +957,18 @@ export class DevExperimentHttpLib implements HttpRequestLibrary {
         const realResp = await this.underlyingLib.fetch(url, opt);
         return mockInternalServerError(realResp);
       }
+    } else if (this.devExperimentState.blockClaimResponse) {
+      if (method === "post" && url.endsWith("/claim")) {
+        logger.warn(`blocking /claim response`);
+        // The claim is not sent on at all: the merchant would hand the order
+        // to our nonce, and every further attempt would then be a repeated
+        // claim instead of a first one.
+        return mockInternalServerError({
+          requestMethod: "POST",
+          requestUrl: url,
+          headers: new HeadersImpl(),
+        });
+      }
     }
     if (
       evalFailProbability(this.devExperimentState.tc?.dropRequestProbability)