taler-harness: remove axios usage, renovate some tests

36 files changed, 631 insertions, 888 deletions

diff --git a/packages/taler-harness/package.json b/packages/taler-harness/package.json
index 6dfe9b74b..435ff8a59 100644
--- a/packages/taler-harness/package.json
+++ b/packages/taler-harness/package.json
@@ -40,7 +40,6 @@
   "dependencies": {
     "@gnu-taler/taler-util": "workspace:*",
     "@gnu-taler/taler-wallet-core": "workspace:*",
-    "axios": "^0.27.2",
     "tslib": "^2.5.3"
   }
 }
\ No newline at end of file
diff --git a/packages/taler-harness/src/bench1.ts b/packages/taler-harness/src/bench1.ts
index 6aa444e0a..618eb683e 100644
--- a/packages/taler-harness/src/bench1.ts
+++ b/packages/taler-harness/src/bench1.ts
@@ -26,13 +26,13 @@ import {
   j2s,
   Logger,
 } from "@gnu-taler/taler-util";
-import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
 import {
   AccessStats,
   createNativeWalletHost2,
   Wallet,
   WalletApiOperation,
 } from "@gnu-taler/taler-wallet-core";
+import { harnessHttpLib } from "./harness/harness.js";
 
 /**
  * Entry point for the benchmark.
@@ -46,11 +46,6 @@ export async function runBench1(configJson: any): Promise<void> {
   // Validate the configuration file for this benchmark.
   const b1conf = codecForBench1Config().decode(configJson);
 
-  const myHttpLib = createPlatformHttpLib({
-    enableThrottling: false,
-    allowHttp: true,
-  });
-
   const numIter = b1conf.iterations ?? 1;
   const numDeposits = b1conf.deposits ?? 5;
   const restartWallet = b1conf.restartAfter ?? 20;
@@ -85,7 +80,7 @@ export async function runBench1(configJson: any): Promise<void> {
       const res = await createNativeWalletHost2({
         // No persistent DB storage.
         persistentStoragePath: undefined,
-        httpLib: myHttpLib,
+        httpLib: harnessHttpLib,
         config: {
           testing: {
             insecureTrustExchange: trustExchange,
diff --git a/packages/taler-harness/src/harness/harness.ts b/packages/taler-harness/src/harness/harness.ts
index 926a0c93b..7db9d82bd 100644
--- a/packages/taler-harness/src/harness/harness.ts
+++ b/packages/taler-harness/src/harness/harness.ts
@@ -55,9 +55,11 @@ import {
   RewardCreateRequest,
   TippingReserveStatus,
   WalletNotification,
+  codecForAny,
 } from "@gnu-taler/taler-util";
 import {
   createPlatformHttpLib,
+  expectSuccessResponseOrThrow,
   readSuccessResponseJsonOrThrow,
 } from "@gnu-taler/taler-util/http";
 import {
@@ -78,7 +80,6 @@ import {
   WalletNotificationWaiter,
 } from "@gnu-taler/taler-wallet-core/remote";
 import { deepStrictEqual } from "assert";
-import axiosImp, { AxiosError } from "axios";
 import { ChildProcess, spawn } from "child_process";
 import * as fs from "fs";
 import * as http from "http";
@@ -87,12 +88,9 @@ import * as path from "path";
 import * as readline from "readline";
 import { URL } from "url";
 import { CoinConfig } from "./denomStructures.js";
-import { LibeufinNexusApi, LibeufinSandboxApi } from "./libeufin-apis.js";
 
 const logger = new Logger("harness.ts");
 
-const axios = axiosImp.default;
-
 export async function delayMs(ms: number): Promise<void> {
   return new Promise((resolve, reject) => {
     setTimeout(() => resolve(), ms);
@@ -322,12 +320,6 @@ export class GlobalTestState {
     );
   }
 
-  assertAxiosError(e: any): asserts e is AxiosError {
-    if (!e.isAxiosError) {
-      throw Error("expected axios error");
-    }
-  }
-
   assertTrue(b: boolean): asserts b {
     if (!b) {
       throw Error("test assertion failed");
@@ -558,7 +550,10 @@ export async function pingProc(
   while (true) {
     try {
       logger.trace(`pinging ${serviceName} at ${url}`);
-      const resp = await axios.get(url);
+      const resp = await harnessHttpLib.fetch(url);
+      if (resp.status !== 200) {
+        throw Error("non-200 status code");
+      }
       logger.trace(`service ${serviceName} available`);
       return;
     } catch (e: any) {
@@ -584,289 +579,6 @@ class BankServiceBase {
 }
 
 /**
- * Work in progress.  The key point is that both Sandbox and Nexus
- * will be configured and started by this class.
- */
-class LibEuFinBankService extends BankServiceBase implements BankServiceHandle {
-  sandboxProc: ProcessWrapper | undefined;
-  nexusProc: ProcessWrapper | undefined;
-
-  http = createPlatformHttpLib({
-    allowHttp: true,
-    enableThrottling: false,
-  });
-
-  static async create(
-    gc: GlobalTestState,
-    bc: BankConfig,
-  ): Promise<LibEuFinBankService> {
-    return new LibEuFinBankService(gc, bc, "foo");
-  }
-
-  get port() {
-    return this.bankConfig.httpPort;
-  }
-  get nexusPort() {
-    return this.bankConfig.httpPort + 1000;
-  }
-
-  get nexusDbConn(): string {
-    return `jdbc:sqlite:${this.globalTestState.testDir}/libeufin-nexus.sqlite3`;
-  }
-
-  get sandboxDbConn(): string {
-    return `jdbc:sqlite:${this.globalTestState.testDir}/libeufin-sandbox.sqlite3`;
-  }
-
-  get nexusBaseUrl(): string {
-    return `http://localhost:${this.nexusPort}`;
-  }
-
-  get baseUrlDemobank(): string {
-    let url = new URL("demobanks/default/", this.baseUrlNetloc);
-    return url.href;
-  }
-
-  get bankAccessApiBaseUrl(): string {
-    let url = new URL("access-api/", this.baseUrlDemobank);
-    return url.href;
-  }
-
-  get baseUrlNetloc(): string {
-    return `http://localhost:${this.bankConfig.httpPort}/`;
-  }
-
-  get baseUrl(): string {
-    return this.bankAccessApiBaseUrl;
-  }
-
-  async setSuggestedExchange(
-    e: ExchangeServiceInterface,
-    exchangePayto: string,
-  ) {
-    await sh(
-      this.globalTestState,
-      "libeufin-sandbox-set-default-exchange",
-      `libeufin-sandbox default-exchange ${e.baseUrl} ${exchangePayto}`,
-      {
-        ...process.env,
-        LIBEUFIN_SANDBOX_DB_CONNECTION: this.sandboxDbConn,
-      },
-    );
-  }
-
-  // Create one at both sides: Sandbox and Nexus.
-  async createExchangeAccount(
-    accountName: string,
-    password: string,
-  ): Promise<HarnessExchangeBankAccount> {
-    logger.info("Create Exchange account(s)!");
-    /**
-     * Many test cases try to create a Exchange account before
-     * starting the bank;  that's because the Pybank did it entirely
-     * via the configuration file.
-     */
-    await this.start();
-    await this.pingUntilAvailable();
-    await LibeufinSandboxApi.createDemobankAccount(accountName, password, {
-      baseUrl: this.bankAccessApiBaseUrl,
-    });
-    let bankAccountLabel = accountName;
-    await LibeufinSandboxApi.createDemobankEbicsSubscriber(
-      {
-        hostID: "talertestEbicsHost",
-        userID: "exchangeEbicsUser",
-        partnerID: "exchangeEbicsPartner",
-      },
-      bankAccountLabel,
-      { baseUrl: this.baseUrlDemobank },
-    );
-
-    await LibeufinNexusApi.createUser(
-      { baseUrl: this.nexusBaseUrl },
-      {
-        username: accountName,
-        password: password,
-      },
-    );
-    await LibeufinNexusApi.createEbicsBankConnection(
-      { baseUrl: this.nexusBaseUrl },
-      {
-        name: "ebics-connection", // connection name.
-        ebicsURL: new URL("ebicsweb", this.baseUrlNetloc).href,
-        hostID: "talertestEbicsHost",
-        userID: "exchangeEbicsUser",
-        partnerID: "exchangeEbicsPartner",
-      },
-    );
-    await LibeufinNexusApi.connectBankConnection(
-      { baseUrl: this.nexusBaseUrl },
-      "ebics-connection",
-    );
-    await LibeufinNexusApi.fetchAccounts(
-      { baseUrl: this.nexusBaseUrl },
-      "ebics-connection",
-    );
-    await LibeufinNexusApi.importConnectionAccount(
-      { baseUrl: this.nexusBaseUrl },
-      "ebics-connection", // connection name
-      accountName, // offered account label
-      `${accountName}-nexus-label`, // bank account label at Nexus
-    );
-    await LibeufinNexusApi.createTwgFacade(
-      { baseUrl: this.nexusBaseUrl },
-      {
-        name: "exchange-facade",
-        connectionName: "ebics-connection",
-        accountName: `${accountName}-nexus-label`,
-        currency: "EUR",
-        reserveTransferLevel: "report",
-      },
-    );
-    await LibeufinNexusApi.postPermission(
-      { baseUrl: this.nexusBaseUrl },
-      {
-        action: "grant",
-        permission: {
-          subjectId: accountName,
-          subjectType: "user",
-          resourceType: "facade",
-          resourceId: "exchange-facade", // facade name
-          permissionName: "facade.talerWireGateway.transfer",
-        },
-      },
-    );
-    await LibeufinNexusApi.postPermission(
-      { baseUrl: this.nexusBaseUrl },
-      {
-        action: "grant",
-        permission: {
-          subjectId: accountName,
-          subjectType: "user",
-          resourceType: "facade",
-          resourceId: "exchange-facade", // facade name
-          permissionName: "facade.talerWireGateway.history",
-        },
-      },
-    );
-    // Set fetch task.
-    await LibeufinNexusApi.postTask(
-      { baseUrl: this.nexusBaseUrl },
-      `${accountName}-nexus-label`,
-      {
-        name: "wirewatch-task",
-        cronspec: "* * *",
-        type: "fetch",
-        params: {
-          level: "all",
-          rangeType: "all",
-        },
-      },
-    );
-    await LibeufinNexusApi.postTask(
-      { baseUrl: this.nexusBaseUrl },
-      `${accountName}-nexus-label`,
-      {
-        name: "aggregator-task",
-        cronspec: "* * *",
-        type: "submit",
-        params: {},
-      },
-    );
-    let facadesResp = await LibeufinNexusApi.getAllFacades({
-      baseUrl: this.nexusBaseUrl,
-    });
-    let accountInfoResp = await LibeufinSandboxApi.demobankAccountInfo(
-      "admin",
-      "secret",
-      { baseUrl: this.bankAccessApiBaseUrl },
-      accountName, // bank account label.
-    );
-    return {
-      accountName: accountName,
-      accountPassword: password,
-      accountPaytoUri: accountInfoResp.data.paytoUri,
-      wireGatewayApiBaseUrl: facadesResp.data.facades[0].baseUrl,
-    };
-  }
-
-  async start(): Promise<void> {
-    /**
-     * Because many test cases try to create a Exchange bank
-     * account _before_ starting the bank (Pybank did it only via
-     * the config), it is possible that at this point Sandbox and
-     * Nexus are already running.  Hence, this method only launches
-     * them if they weren't launched earlier.
-     */
-
-    // Only go ahead if BOTH aren't running.
-    if (this.sandboxProc || this.nexusProc) {
-      logger.info("Nexus or Sandbox already running, not taking any action.");
-      return;
-    }
-    await sh(
-      this.globalTestState,
-      "libeufin-sandbox-config-demobank",
-      `libeufin-sandbox config --currency=${this.bankConfig.currency} default`,
-      {
-        ...process.env,
-        LIBEUFIN_SANDBOX_DB_CONNECTION: this.sandboxDbConn,
-        LIBEUFIN_SANDBOX_ADMIN_PASSWORD: "secret",
-      },
-    );
-    this.sandboxProc = this.globalTestState.spawnService(
-      "libeufin-sandbox",
-      ["serve", "--port", `${this.port}`],
-      "libeufin-sandbox",
-      {
-        ...process.env,
-        LIBEUFIN_SANDBOX_DB_CONNECTION: this.sandboxDbConn,
-        LIBEUFIN_SANDBOX_ADMIN_PASSWORD: "secret",
-      },
-    );
-    await runCommand(
-      this.globalTestState,
-      "libeufin-nexus-superuser",
-      "libeufin-nexus",
-      ["superuser", "admin", "--password", "test"],
-      {
-        ...process.env,
-        LIBEUFIN_NEXUS_DB_CONNECTION: this.nexusDbConn,
-      },
-    );
-    this.nexusProc = this.globalTestState.spawnService(
-      "libeufin-nexus",
-      ["serve", "--port", `${this.nexusPort}`],
-      "libeufin-nexus",
-      {
-        ...process.env,
-        LIBEUFIN_NEXUS_DB_CONNECTION: this.nexusDbConn,
-      },
-    );
-    // need to wait here, because at this point
-    // a Ebics host needs to be created (RESTfully)
-    await this.pingUntilAvailable();
-    LibeufinSandboxApi.createEbicsHost(
-      { baseUrl: this.baseUrlNetloc },
-      "talertestEbicsHost",
-    );
-  }
-
-  async pingUntilAvailable(): Promise<void> {
-    await pingProc(
-      this.sandboxProc,
-      `http://localhost:${this.bankConfig.httpPort}`,
-      "libeufin-sandbox",
-    );
-    await pingProc(
-      this.nexusProc,
-      `${this.nexusBaseUrl}/config`,
-      "libeufin-nexus",
-    );
-  }
-}
-
-/**
  * Implementation of the bank service using the "taler-fakebank-run" tool.
  */
 export class FakebankService
@@ -1152,6 +864,9 @@ export class ExchangeService implements ExchangeServiceInterface {
       "currency_round_unit",
       e.roundUnit ?? `${e.currency}:0.01`,
     );
+    // Set to a high value to not break existing test cases where the merchant
+    // would cover all fees.
+    config.setString("exchange", "STEFAN_ABS", `${e.currency}:1`);
     config.setString(
       "exchange",
       "revocation_dir",
@@ -1636,20 +1351,30 @@ export interface DeleteTippingReserveArgs {
   purge?: boolean;
 }
 
+/**
+ * Default HTTP client handle for the integration test harness.
+ */
+export const harnessHttpLib = createPlatformHttpLib({
+  allowHttp: true,
+  enableThrottling: false,
+});
+
 export class MerchantApiClient {
   constructor(
     private baseUrl: string,
     public readonly auth: MerchantAuthConfiguration,
   ) {}
 
-  // FIXME: Migrate everything to this in favor of axios
-  http = createPlatformHttpLib({ allowHttp: true, enableThrottling: false });
+  httpClient = createPlatformHttpLib({ allowHttp: true, enableThrottling: false });
 
   async changeAuth(auth: MerchantAuthConfiguration): Promise<void> {
     const url = new URL("private/auth", this.baseUrl);
-    await axios.post(url.href, auth, {
+    const res = await this.httpClient.fetch(url.href, {
+      method: "POST",
+      body: auth,
       headers: this.makeAuthHeader(),
     });
+    await expectSuccessResponseOrThrow(res);
   }
 
   async deleteTippingReserve(req: DeleteTippingReserveArgs): Promise<void> {
@@ -1657,7 +1382,8 @@ export class MerchantApiClient {
     if (req.purge) {
       url.searchParams.set("purge", "YES");
     }
-    const resp = await axios.delete(url.href, {
+    const resp = await this.httpClient.fetch(url.href, {
+      method: "DELETE",
       headers: this.makeAuthHeader(),
     });
     logger.info(`delete status: ${resp.status}`);
@@ -1668,7 +1394,7 @@ export class MerchantApiClient {
     req: CreateMerchantTippingReserveRequest,
   ): Promise<MerchantReserveCreateConfirmation> {
     const url = new URL("private/reserves", this.baseUrl);
-    const resp = await this.http.fetch(url.href, {
+    const resp = await this.httpClient.fetch(url.href, {
       method: "POST",
       body: req,
       headers: this.makeAuthHeader(),
@@ -1684,7 +1410,7 @@ export class MerchantApiClient {
     console.log(this.makeAuthHeader());
     const url = new URL("private", this.baseUrl);
     logger.info(`request url ${url.href}`);
-    const resp = await this.http.fetch(url.href, {
+    const resp = await this.httpClient.fetch(url.href, {
       method: "GET",
       headers: this.makeAuthHeader(),
     });
@@ -1694,7 +1420,7 @@ export class MerchantApiClient {
   async getPrivateTipReserves(): Promise<TippingReserveStatus> {
     console.log(this.makeAuthHeader());
     const url = new URL("private/reserves", this.baseUrl);
-    const resp = await this.http.fetch(url.href, {
+    const resp = await this.httpClient.fetch(url.href, {
       method: "GET",
       headers: this.makeAuthHeader(),
     });
@@ -1704,33 +1430,37 @@ export class MerchantApiClient {
 
   async deleteInstance(instanceId: string) {
     const url = new URL(`management/instances/${instanceId}`, this.baseUrl);
-    await axios.delete(url.href, {
+    const resp = await this.httpClient.fetch(url.href, {
+      method: "DELETE",
       headers: this.makeAuthHeader(),
     });
+    await expectSuccessResponseOrThrow(resp);
   }
 
   async createInstance(req: MerchantInstanceConfig): Promise<void> {
     const url = new URL("management/instances", this.baseUrl);
-    await axios.post(url.href, req, {
+    await this.httpClient.fetch(url.href, {
+      method: "POST",
+      body: req,
       headers: this.makeAuthHeader(),
     });
   }
 
   async getInstances(): Promise<MerchantInstancesResponse> {
     const url = new URL("management/instances", this.baseUrl);
-    const resp = await axios.get(url.href, {
+    const resp = await this.httpClient.fetch(url.href, {
       headers: this.makeAuthHeader(),
     });
-    return resp.data;
+    return resp.json();
   }
 
   async getInstanceFullDetails(instanceId: string): Promise<any> {
     const url = new URL(`management/instances/${instanceId}`, this.baseUrl);
     try {
-      const resp = await axios.get(url.href, {
+      const resp = await this.httpClient.fetch(url.href, {
         headers: this.makeAuthHeader(),
       });
-      return resp.data;
+      return resp.json();
     } catch (e) {
       throw e;
     }
@@ -1750,6 +1480,8 @@ export class MerchantApiClient {
 
 /**
  * FIXME:  This should be deprecated in favor of MerchantApiClient
+ *
+ * @deprecated use MerchantApiClient instead
  */
 export namespace MerchantPrivateApi {
   export async function createOrder(
@@ -1760,10 +1492,15 @@ export namespace MerchantPrivateApi {
   ): Promise<MerchantPostOrderResponse> {
     const baseUrl = merchantService.makeInstanceBaseUrl(instanceName);
     let url = new URL("private/orders", baseUrl);
-    const resp = await axios.post(url.href, req, {
+    const resp = await harnessHttpLib.fetch(url.href, {
+      method: "POST",
+      body: req,
       headers: withAuthorization as Record<string, string>,
     });
-    return codecForMerchantPostOrderResponse().decode(resp.data);
+    return readSuccessResponseJsonOrThrow(
+      resp,
+      codecForMerchantPostOrderResponse(),
+    );
   }
 
   export async function createTemplate(
@@ -1774,7 +1511,9 @@ export namespace MerchantPrivateApi {
   ) {
     const baseUrl = merchantService.makeInstanceBaseUrl(instanceName);
     let url = new URL("private/templates", baseUrl);
-    const resp = await axios.post(url.href, req, {
+    const resp = await harnessHttpLib.fetch(url.href, {
+      method: "POST",
+      body: req,
       headers: withAuthorization as Record<string, string>,
     });
     if (resp.status !== 204) {
@@ -1794,10 +1533,13 @@ export namespace MerchantPrivateApi {
     if (query.sessionId) {
       reqUrl.searchParams.set("session_id", query.sessionId);
     }
-    const resp = await axios.get(reqUrl.href, {
+    const resp = await harnessHttpLib.fetch(reqUrl.href, {
       headers: withAuthorization as Record<string, string>,
     });
-    return codecForMerchantOrderPrivateStatusResponse().decode(resp.data);
+    return readSuccessResponseJsonOrThrow(
+      resp,
+      codecForMerchantOrderPrivateStatusResponse(),
+    );
   }
 
   export async function giveRefund(
@@ -1813,12 +1555,16 @@ export namespace MerchantPrivateApi {
       `private/orders/${r.orderId}/refund`,
       merchantService.makeInstanceBaseUrl(r.instance),
     );
-    const resp = await axios.post(reqUrl.href, {
-      refund: r.amount,
-      reason: r.justification,
+    const resp = await harnessHttpLib.fetch(reqUrl.href, {
+      method: "POST",
+      body: {
+        refund: r.amount,
+        reason: r.justification,
+      },
     });
+    const respBody = await resp.json();
     return {
-      talerRefundUri: resp.data.taler_refund_uri,
+      talerRefundUri: respBody.taler_refund_uri,
     };
   }
 
@@ -1830,9 +1576,9 @@ export namespace MerchantPrivateApi {
       `private/reserves`,
       merchantService.makeInstanceBaseUrl(instance),
     );
-    const resp = await axios.get(reqUrl.href);
+    const resp = await harnessHttpLib.fetch(reqUrl.href);
     // FIXME: validate
-    return resp.data;
+    return resp.json();
   }
 
   export async function giveTip(
@@ -1844,9 +1590,12 @@ export namespace MerchantPrivateApi {
       `private/tips`,
       merchantService.makeInstanceBaseUrl(instance),
     );
-    const resp = await axios.post(reqUrl.href, req);
+    const resp = await harnessHttpLib.fetch(reqUrl.href, {
+      method: "POST",
+      body: req,
+    });
     // FIXME: validate
-    return resp.data;
+    return resp.json();
   }
 }
 
@@ -2052,7 +1801,12 @@ export class MerchantService implements MerchantServiceInterface {
         instanceConfig.defaultPayDelay ??
         Duration.toTalerProtocolDuration(Duration.getForever()),
     };
-    await axios.post(url, body);
+    const httpLib = createPlatformHttpLib({
+      allowHttp: true,
+      enableThrottling: false,
+    });
+    const resp = await httpLib.fetch(url, { method: "POST", body });
+    await expectSuccessResponseOrThrow(resp);
   }
 
   makeInstanceBaseUrl(instanceName?: string): string {
diff --git a/packages/taler-harness/src/harness/libeufin-apis.ts b/packages/taler-harness/src/harness/libeufin-apis.ts
index cb9acdaa4..3c57eee07 100644
--- a/packages/taler-harness/src/harness/libeufin-apis.ts
+++ b/packages/taler-harness/src/harness/libeufin-apis.ts
@@ -6,8 +6,21 @@
  */
 
 import { URL } from "@gnu-taler/taler-util";
-import axiosImp from "axios";
-const axios = axiosImp.default;
+import {
+  createPlatformHttpLib,
+  makeBasicAuthHeader,
+} from "@gnu-taler/taler-util/http";
+import {
+  LibeufinNexusTransactions,
+  LibeufinSandboxAdminBankAccountBalance,
+  NexusBankConnections,
+  NexusFacadeListResponse,
+  NexusGetPermissionsResponse,
+  NexusNewTransactionsInfo,
+  NexusTask,
+  NexusTaskCollection,
+  NexusUserResponse,
+} from "./libeufin.js";
 
 export interface LibeufinSandboxServiceInterface {
   baseUrl: string;
@@ -163,30 +176,13 @@ export interface LibeufinSandboxAddIncomingRequest {
   direction: string;
 }
 
+const libeufinHttpLib = createPlatformHttpLib();
+
 /**
  * APIs spread across Legacy and Access, it is therefore
  * the "base URL" relative to which API every call addresses.
  */
 export namespace LibeufinSandboxApi {
-  // Need Access API base URL.
-  export async function demobankAccountInfo(
-    username: string,
-    password: string,
-    libeufinSandboxService: LibeufinSandboxServiceInterface,
-    accountLabel: string,
-  ) {
-    let url = new URL(
-      `accounts/${accountLabel}`,
-      libeufinSandboxService.baseUrl,
-    );
-    return await axios.get(url.href, {
-      auth: {
-        username: username,
-        password: password,
-      },
-    });
-  }
-
   // Creates one bank account via the Access API.
   // Need the /demobanks/$id/access-api as the base URL
   export async function createDemobankAccount(
@@ -194,12 +190,15 @@ export namespace LibeufinSandboxApi {
     password: string,
     libeufinSandboxService: LibeufinSandboxServiceInterface,
     iban: string | null = null,
-  ) {
+  ): Promise<void> {
     let url = new URL("testing/register", libeufinSandboxService.baseUrl);
-    await axios.post(url.href, {
-      username: username,
-      password: password,
-      iban: iban,
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      body: {
+        username: username,
+        password: password,
+        iban: iban,
+      },
     });
   }
   // Need /demobanks/$id as the base URL
@@ -209,75 +208,57 @@ export namespace LibeufinSandboxApi {
     libeufinSandboxService: LibeufinSandboxServiceInterface,
     username: string = "admin",
     password: string = "secret",
-  ) {
+  ): Promise<void> {
     // baseUrl should already be pointed to one demobank.
     let url = new URL("ebics/subscribers", libeufinSandboxService.baseUrl);
-    await axios.post(
-      url.href,
-      {
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      body: {
         userID: req.userID,
         hostID: req.hostID,
         partnerID: req.partnerID,
         demobankAccountLabel: demobankAccountLabel,
       },
-      {
-        auth: {
-          username: "admin",
-          password: "secret",
-        },
-      },
-    );
+    });
   }
 
   export async function rotateKeys(
     libeufinSandboxService: LibeufinSandboxServiceInterface,
     hostID: string,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinSandboxService.baseUrl;
     let url = new URL(`admin/ebics/hosts/${hostID}/rotate-keys`, baseUrl);
-    await axios.post(
-      url.href,
-      {},
-      {
-        auth: {
-          username: "admin",
-          password: "secret",
-        },
-      },
-    );
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      body: {},
+    });
   }
   export async function createEbicsHost(
     libeufinSandboxService: LibeufinSandboxServiceInterface,
     hostID: string,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinSandboxService.baseUrl;
     let url = new URL("admin/ebics/hosts", baseUrl);
-    await axios.post(
-      url.href,
-      {
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      body: {
         hostID,
         ebicsVersion: "2.5",
       },
-      {
-        auth: {
-          username: "admin",
-          password: "secret",
-        },
-      },
-    );
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+    });
   }
 
   export async function createBankAccount(
     libeufinSandboxService: LibeufinSandboxServiceInterface,
     req: BankAccountInfo,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinSandboxService.baseUrl;
     let url = new URL(`admin/bank-accounts/${req.label}`, baseUrl);
-    await axios.post(url.href, req, {
-      auth: {
-        username: "admin",
-        password: "secret",
-      },
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      body: req,
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
   }
 
@@ -288,14 +269,13 @@ export namespace LibeufinSandboxApi {
   export async function createEbicsSubscriber(
     libeufinSandboxService: LibeufinSandboxServiceInterface,
     req: CreateEbicsSubscriberRequest,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinSandboxService.baseUrl;
     let url = new URL("admin/ebics/subscribers", baseUrl);
-    await axios.post(url.href, req, {
-      auth: {
-        username: "admin",
-        password: "secret",
-      },
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      body: req,
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
   }
 
@@ -306,14 +286,13 @@ export namespace LibeufinSandboxApi {
   export async function createEbicsBankAccount(
     libeufinSandboxService: LibeufinSandboxServiceInterface,
     req: CreateEbicsBankAccountRequest,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinSandboxService.baseUrl;
     let url = new URL("admin/ebics/bank-accounts", baseUrl);
-    await axios.post(url.href, req, {
-      auth: {
-        username: "admin",
-        password: "secret",
-      },
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      body: req,
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
   }
 
@@ -321,17 +300,16 @@ export namespace LibeufinSandboxApi {
     libeufinSandboxService: LibeufinSandboxServiceInterface,
     accountLabel: string,
     req: SimulateIncomingTransactionRequest,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinSandboxService.baseUrl;
     let url = new URL(
       `admin/bank-accounts/${accountLabel}/simulate-incoming-transaction`,
       baseUrl,
     );
-    await axios.post(url.href, req, {
-      auth: {
-        username: "admin",
-        password: "secret",
-      },
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      body: req,
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
   }
 
@@ -344,13 +322,10 @@ export namespace LibeufinSandboxApi {
       `admin/bank-accounts/${accountLabel}/transactions`,
       baseUrl,
     );
-    const res = await axios.get(url.href, {
-      auth: {
-        username: "admin",
-        password: "secret",
-      },
+    const res = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
-    return res.data as SandboxAccountTransactions;
+    return (await res.json()) as SandboxAccountTransactions;
   }
 
   export async function getCamt053(
@@ -359,61 +334,50 @@ export namespace LibeufinSandboxApi {
   ): Promise<any> {
     const baseUrl = libeufinSandboxService.baseUrl;
     let url = new URL("admin/payments/camt", baseUrl);
-    return await axios.post(
-      url.href,
-      {
+    return await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: {
         bankaccount: accountLabel,
         type: 53,
       },
-      {
-        auth: {
-          username: "admin",
-          password: "secret",
-        },
-      },
-    );
+    });
   }
 
   export async function getAccountInfoWithBalance(
     libeufinSandboxService: LibeufinSandboxServiceInterface,
     accountLabel: string,
-  ): Promise<any> {
+  ): Promise<LibeufinSandboxAdminBankAccountBalance> {
     const baseUrl = libeufinSandboxService.baseUrl;
     let url = new URL(`admin/bank-accounts/${accountLabel}`, baseUrl);
-    return await axios.get(url.href, {
-      auth: {
-        username: "admin",
-        password: "secret",
-      },
+    const res = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
+    return res.json();
   }
 }
 
 export namespace LibeufinNexusApi {
   export async function getAllConnections(
     nexus: LibeufinNexusServiceInterface,
-  ): Promise<any> {
+  ): Promise<NexusBankConnections> {
     let url = new URL("bank-connections", nexus.baseUrl);
-    const res = await axios.get(url.href, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    const res = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
-    return res;
+    return res.json();
   }
 
   export async function deleteBankConnection(
     libeufinNexusService: LibeufinNexusServiceInterface,
     req: DeleteBankConnectionRequest,
-  ): Promise<any> {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL("bank-connections/delete-connection", baseUrl);
-    return await axios.post(url.href, req, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: req,
     });
   }
 
@@ -423,9 +387,10 @@ export namespace LibeufinNexusApi {
   ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL("bank-connections", baseUrl);
-    await axios.post(
-      url.href,
-      {
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: {
         source: "new",
         type: "ebics",
         name: req.name,
@@ -437,13 +402,7 @@ export namespace LibeufinNexusApi {
           systemID: req.systemID,
         },
       },
-      {
-        auth: {
-          username: "admin",
-          password: "test",
-        },
-      },
-    );
+    });
   }
 
   export async function getBankAccount(
@@ -452,12 +411,10 @@ export namespace LibeufinNexusApi {
   ): Promise<any> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(`bank-accounts/${accountName}`, baseUrl);
-    return await axios.get(url.href, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    const resp = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
+    return resp.json();
   }
 
   export async function submitInitiatedPayment(
@@ -470,16 +427,11 @@ export namespace LibeufinNexusApi {
       `bank-accounts/${accountName}/payment-initiations/${paymentId}/submit`,
       baseUrl,
     );
-    await axios.post(
-      url.href,
-      {},
-      {
-        auth: {
-          username: "admin",
-          password: "test",
-        },
-      },
-    );
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: {},
+    });
   }
 
   export async function fetchAccounts(
@@ -491,16 +443,11 @@ export namespace LibeufinNexusApi {
       `bank-connections/${connectionName}/fetch-accounts`,
       baseUrl,
     );
-    await axios.post(
-      url.href,
-      {},
-      {
-        auth: {
-          username: "admin",
-          password: "test",
-        },
-      },
-    );
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: {},
+    });
   }
 
   export async function importConnectionAccount(
@@ -514,37 +461,27 @@ export namespace LibeufinNexusApi {
       `bank-connections/${connectionName}/import-account`,
       baseUrl,
     );
-    await axios.post(
-      url.href,
-      {
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: {
         offeredAccountId,
         nexusBankAccountId,
       },
-      {
-        auth: {
-          username: "admin",
-          password: "test",
-        },
-      },
-    );
+    });
   }
 
   export async function connectBankConnection(
     libeufinNexusService: LibeufinNexusServiceInterface,
     connectionName: string,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(`bank-connections/${connectionName}/connect`, baseUrl);
-    await axios.post(
-      url.href,
-      {},
-      {
-        auth: {
-          username: "admin",
-          password: "test",
-        },
-      },
-    );
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: {},
+    });
   }
 
   export async function getPaymentInitiations(
@@ -558,43 +495,33 @@ export namespace LibeufinNexusApi {
       `/bank-accounts/${accountName}/payment-initiations`,
       baseUrl,
     );
-    let response = await axios.get(url.href, {
-      auth: {
-        username: username,
-        password: password,
-      },
+    let response = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
+    const respJson = await response.json();
     console.log(
       `Payment initiations of: ${accountName}`,
-      JSON.stringify(response.data, null, 2),
+      JSON.stringify(respJson, null, 2),
     );
   }
 
-  export async function getConfig(
-    libeufinNexusService: LibeufinNexusServiceInterface,
-  ): Promise<void> {
-    const baseUrl = libeufinNexusService.baseUrl;
-    let url = new URL(`/config`, baseUrl);
-    let response = await axios.get(url.href);
-  }
-
   // Uses the Anastasis API to get a list of transactions.
   export async function getAnastasisTransactions(
     libeufinNexusService: LibeufinNexusServiceInterface,
     anastasisBaseUrl: string,
+    // FIXME: Nail down type!
     params: {}, // of the request: {delta: 5, ..}
     username: string = "admin",
     password: string = "test",
   ): Promise<any> {
     let url = new URL("history/incoming", anastasisBaseUrl);
-    let response = await axios.get(url.href, {
-      params: params,
-      auth: {
-        username: username,
-        password: password,
-      },
+    for (const [k, v] of Object.entries(params)) {
+      url.searchParams.set(k, String(v));
+    }
+    let response = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
-    return response;
+    return response.json();
   }
 
   // FIXME: this function should return some structured
@@ -604,16 +531,13 @@ export namespace LibeufinNexusApi {
     accountName: string,
     username: string = "admin",
     password: string = "test",
-  ): Promise<any> {
+  ): Promise<LibeufinNexusTransactions> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(`/bank-accounts/${accountName}/transactions`, baseUrl);
-    let response = await axios.get(url.href, {
-      auth: {
-        username: username,
-        password: password,
-      },
+    let response = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
-    return response;
+    return response.json();
   }
 
   export async function fetchTransactions(
@@ -623,25 +547,21 @@ export namespace LibeufinNexusApi {
     level: string = "report",
     username: string = "admin",
     password: string = "test",
-  ): Promise<any> {
+  ): Promise<NexusNewTransactionsInfo> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(
       `/bank-accounts/${accountName}/fetch-transactions`,
       baseUrl,
     );
-    return await axios.post(
-      url.href,
-      {
+    const resp = await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: {
         rangeType: rangeType,
         level: level,
       },
-      {
-        auth: {
-          username: username,
-          password: password,
-        },
-      },
-    );
+    });
+    return resp.json();
   }
 
   export async function changePassword(
@@ -649,97 +569,109 @@ export namespace LibeufinNexusApi {
     username: string,
     req: UpdateNexusUserRequest,
     auth: NexusAuth,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(`/users/${username}/password`, baseUrl);
-    await axios.post(url.href, req, auth);
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: req,
+    });
   }
 
   export async function getUser(
     libeufinNexusService: LibeufinNexusServiceInterface,
     auth: NexusAuth,
-  ): Promise<any> {
+  ): Promise<NexusUserResponse> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(`/user`, baseUrl);
-    return await axios.get(url.href, auth);
+    const resp = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+    });
+    return resp.json();
   }
 
   export async function createUser(
     libeufinNexusService: LibeufinNexusServiceInterface,
     req: CreateNexusUserRequest,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(`/users`, baseUrl);
-    await axios.post(url.href, req, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: req,
     });
   }
 
   export async function getAllPermissions(
     libeufinNexusService: LibeufinNexusServiceInterface,
-  ): Promise<any> {
+  ): Promise<NexusGetPermissionsResponse> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(`/permissions`, baseUrl);
-    return await axios.get(url.href, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    const resp = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
+    return resp.json();
   }
 
   export async function postPermission(
     libeufinNexusService: LibeufinNexusServiceInterface,
     req: PostNexusPermissionRequest,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(`/permissions`, baseUrl);
-    await axios.post(url.href, req, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: req,
+    });
+  }
+
+  export async function getAllTasks(
+    libeufinNexusService: LibeufinNexusServiceInterface,
+    bankAccountName: string,
+  ): Promise<NexusTaskCollection> {
+    const baseUrl = libeufinNexusService.baseUrl;
+    let url = new URL(`/bank-accounts/${bankAccountName}/schedule`, baseUrl);
+    const resp = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
+    return resp.json();
   }
 
-  export async function getTasks(
+  export async function getTask(
     libeufinNexusService: LibeufinNexusServiceInterface,
     bankAccountName: string,
     // When void, the request returns the list of all the
     // tasks under this bank account.
-    taskName: string | void,
-  ): Promise<any> {
+    taskName: string,
+  ): Promise<NexusTask> {
     const baseUrl = libeufinNexusService.baseUrl;
-    let url = new URL(`/bank-accounts/${bankAccountName}/schedule`, baseUrl);
+    let url = new URL(
+      `/bank-accounts/${bankAccountName}/schedule/${taskName}`,
+      baseUrl,
+    );
     if (taskName) url = new URL(taskName, `${url.href}/`);
-
-    // It's caller's responsibility to interpret the response.
-    return await axios.get(url.href, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    const resp = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
+    return resp.json();
   }
 
   export async function deleteTask(
     libeufinNexusService: LibeufinNexusServiceInterface,
     bankAccountName: string,
     taskName: string,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(
       `/bank-accounts/${bankAccountName}/schedule/${taskName}`,
       baseUrl,
     );
-    await axios.delete(url.href, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    await libeufinHttpLib.fetch(url.href, {
+      method: "DELETE",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
   }
 
@@ -747,53 +679,50 @@ export namespace LibeufinNexusApi {
     libeufinNexusService: LibeufinNexusServiceInterface,
     bankAccountName: string,
     req: PostNexusTaskRequest,
-  ): Promise<any> {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(`/bank-accounts/${bankAccountName}/schedule`, baseUrl);
-    return await axios.post(url.href, req, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: req,
     });
   }
 
   export async function deleteFacade(
     libeufinNexusService: LibeufinNexusServiceInterface,
     facadeName: string,
-  ): Promise<any> {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(`facades/${facadeName}`, baseUrl);
-    return await axios.delete(url.href, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    await libeufinHttpLib.fetch(url.href, {
+      method: "DELETE",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
   }
 
   export async function getAllFacades(
     libeufinNexusService: LibeufinNexusServiceInterface,
-  ): Promise<any> {
+  ): Promise<NexusFacadeListResponse> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL("facades", baseUrl);
-    return await axios.get(url.href, {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
+    const resp = await libeufinHttpLib.fetch(url.href, {
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
     });
+    // FIXME: Just return validated, typed response here!
+    return resp.json();
   }
 
   export async function createAnastasisFacade(
     libeufinNexusService: LibeufinNexusServiceInterface,
     req: CreateAnastasisFacadeRequest,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL("facades", baseUrl);
-    await axios.post(
-      url.href,
-      {
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: {
         name: req.name,
         type: "anastasis",
         config: {
@@ -803,24 +732,19 @@ export namespace LibeufinNexusApi {
           reserveTransferLevel: req.reserveTransferLevel,
         },
       },
-      {
-        auth: {
-          username: "admin",
-          password: "test",
-        },
-      },
-    );
+    });
   }
 
   export async function createTwgFacade(
     libeufinNexusService: LibeufinNexusServiceInterface,
     req: CreateTalerWireGatewayFacadeRequest,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL("facades", baseUrl);
-    await axios.post(
-      url.href,
-      {
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: {
         name: req.name,
         type: "taler-wire-gateway",
         config: {
@@ -830,33 +754,22 @@ export namespace LibeufinNexusApi {
           reserveTransferLevel: req.reserveTransferLevel,
         },
       },
-      {
-        auth: {
-          username: "admin",
-          password: "test",
-        },
-      },
-    );
+    });
   }
 
   export async function submitAllPaymentInitiations(
     libeufinNexusService: LibeufinNexusServiceInterface,
     accountId: string,
-  ) {
+  ): Promise<void> {
     const baseUrl = libeufinNexusService.baseUrl;
     let url = new URL(
       `/bank-accounts/${accountId}/submit-all-payment-initiations`,
       baseUrl,
     );
-    await axios.post(
-      url.href,
-      {},
-      {
-        auth: {
-          username: "admin",
-          password: "test",
-        },
-      },
-    );
+    await libeufinHttpLib.fetch(url.href, {
+      method: "POST",
+      headers: { Authorization: makeBasicAuthHeader("admin", "secret") },
+      body: {},
+    });
   }
 }
diff --git a/packages/taler-harness/src/harness/libeufin.ts b/packages/taler-harness/src/harness/libeufin.ts
index 8fd276fad..9f3e7a5a0 100644
--- a/packages/taler-harness/src/harness/libeufin.ts
+++ b/packages/taler-harness/src/harness/libeufin.ts
@@ -26,39 +26,32 @@
 /**
  * Imports.
  */
-import axios from "axios";
-import { URL, Logger } from "@gnu-taler/taler-util";
+import { AmountString, Logger } from "@gnu-taler/taler-util";
 import {
-  GlobalTestState,
   DbInfo,
-  pingProc,
+  GlobalTestState,
   ProcessWrapper,
+  getRandomIban,
+  pingProc,
   runCommand,
   setupDb,
   sh,
-  getRandomIban,
 } from "../harness/harness.js";
 import {
-  LibeufinSandboxApi,
-  LibeufinNexusApi,
+  CreateAnastasisFacadeRequest,
   CreateEbicsBankAccountRequest,
-  LibeufinSandboxServiceInterface,
-  CreateTalerWireGatewayFacadeRequest,
-  SimulateIncomingTransactionRequest,
-  SandboxAccountTransactions,
-  DeleteBankConnectionRequest,
   CreateEbicsBankConnectionRequest,
-  UpdateNexusUserRequest,
-  NexusAuth,
-  CreateAnastasisFacadeRequest,
-  PostNexusTaskRequest,
-  PostNexusPermissionRequest,
   CreateNexusUserRequest,
+  CreateTalerWireGatewayFacadeRequest,
+  LibeufinNexusApi,
+  LibeufinSandboxApi,
+  LibeufinSandboxServiceInterface,
+  PostNexusPermissionRequest,
 } from "../harness/libeufin-apis.js";
 
 const logger = new Logger("libeufin.ts");
 
-export { LibeufinSandboxApi, LibeufinNexusApi };
+export { LibeufinNexusApi, LibeufinSandboxApi };
 
 export interface LibeufinServices {
   libeufinSandbox: LibeufinSandboxService;
@@ -76,7 +69,7 @@ export interface LibeufinNexusConfig {
   databaseJdbcUri: string;
 }
 
-interface LibeufinNexusMoneyMovement {
+export interface LibeufinNexusMoneyMovement {
   amount: string;
   creditDebitIndicator: string;
   details: {
@@ -103,11 +96,11 @@ interface LibeufinNexusMoneyMovement {
   };
 }
 
-interface LibeufinNexusBatches {
+export interface LibeufinNexusBatches {
   batchTransactions: Array<LibeufinNexusMoneyMovement>;
 }
 
-interface LibeufinNexusTransaction {
+export interface LibeufinNexusTransaction {
   amount: string;
   creditDebitIndicator: string;
   status: string;
@@ -118,7 +111,7 @@ interface LibeufinNexusTransaction {
   batches: Array<LibeufinNexusBatches>;
 }
 
-interface LibeufinNexusTransactions {
+export interface LibeufinNexusTransactions {
   transactions: Array<LibeufinNexusTransaction>;
 }
 
@@ -182,6 +175,146 @@ export interface LibeufinPreparedPaymentDetails {
   nexusBankAccountName: string;
 }
 
+export interface NexusBankConnection {
+  // connection type.  For example "ebics".
+  type: string;
+
+  // connection name as given by the user at
+  // the moment of creation.
+  name: string;
+}
+
+export interface NexusBankConnections {
+  bankConnections: NexusBankConnection[];
+}
+
+export interface FacadeShowInfo {
+  // Name of the facade, same as the "fcid" parameter.
+  name: string;
+
+  // Type of the facade.
+  // For example, "taler-wire-gateway".
+  type: string;
+
+  // Bas URL of the facade.
+  baseUrl: string;
+
+  // details depending on the facade type.
+  config: any;
+}
+
+export interface FetchParams {
+  // Because transactions are delivered by banks in "batches",
+  // then every batch can have different qualities.  This value
+  // lets the request specify which type of batch ought to be
+  // returned.  Currently, the following two type are supported:
+  //
+  // 'report': typically includes only non booked transactions.
+  // 'statement': typically includes only booked transactions.
+  level: "report" | "statement" | "all";
+
+  // This type indicates the time range of the query.
+  // It allows the following values:
+  //
+  // 'latest': retrieves the last transactions from the bank.
+  //           If there are older unread transactions, those will *not*
+  //           be downloaded.
+  //
+  // 'all': retrieves all the transactions from the bank,
+  //        until the oldest.
+  //
+  // 'previous-days': currently *not* implemented, it will allow
+  //                  the request to download transactions from
+  //                  today until N days before.
+  //
+  // 'since-last': retrieves all the transactions since the last
+  //               time one was downloaded.
+  //
+  rangeType: "latest" | "all" | "previous-days" | "since-last";
+}
+
+export interface NexusTask {
+  // The resource being impacted by this operation.
+  // Typically a (Nexus) bank account being fetched
+  // or whose payments are submitted.  In this cases,
+  // this value is the "bank-account" constant.
+  resourceType: string;
+  // Name of the resource.  In case of "bank-account", that
+  // is the name under which the bank account was imported
+  // from the bank.
+  resourceId: string;
+  // Task name, equals 'taskId'
+  taskName: string;
+  // Values allowed are "fetch" or "submit".
+  taskType: string;
+  // FIXME: describe.
+  taskCronSpec: string;
+  // Only meaningful for "fetch" types.
+  taskParams: FetchParams;
+  // Timestamp in secons when the next iteration will run.
+  nextScheduledExecutionSec: number;
+  // Timestamp in seconds when the previous iteration ran.
+  prevScheduledExecutionSec: number;
+}
+
+export interface NexusNewTransactionsInfo {
+  // How many transactions are new to Nexus.
+  newTransactions: number;
+  // How many transactions got downloaded by the request.
+  // Note that a transaction can be downloaded multiple
+  // times but only counts as new once.
+  downloadedTransactions: number;
+}
+
+
+export interface NexusUserResponse {
+  // User name
+  username: string;
+
+  // Is this a super user?
+  superuser: boolean;
+}
+
+export interface NexusTaskShortInfo {
+  cronspec: string;
+  type: "fetch" | "submit";
+  params: FetchParams;
+}
+
+export interface NexusTaskCollection {
+  // This field can contain *multiple* objects of the type sampled below.
+  schedule: {
+    [taskName: string]: NexusTaskShortInfo;
+  };
+}
+
+export interface NexusFacadeListResponse {
+  facades: FacadeShowInfo[];
+}
+
+export interface LibeufinSandboxAdminBankAccountBalance {
+  // Balance in the $currency:$amount format.
+  balance: AmountString;
+  // IBAN of the bank account identified by $accountLabel
+  iban: string;
+  // BIC of the bank account identified by $accountLabel
+  bic: string;
+  // Mentions $accountLabel
+  label: string;
+}
+
+export interface LibeufinPermission {
+  subjectType: string;
+  subjectId: string;
+  resourceType: string;
+  resourceId: string;
+  permissionName: string;
+}
+
+export interface NexusGetPermissionsResponse {
+  permissions: LibeufinPermission[];
+}
+
 export class LibeufinSandboxService implements LibeufinSandboxServiceInterface {
   static async create(
     gc: GlobalTestState,
diff --git a/packages/taler-harness/src/index.ts b/packages/taler-harness/src/index.ts
index 0efaea9ad..cd688ed89 100644
--- a/packages/taler-harness/src/index.ts
+++ b/packages/taler-harness/src/index.ts
@@ -191,12 +191,12 @@ configCli
     const config = Configuration.load();
     let res;
     if (args.get.file) {
-      res = config.getString(args.get.section, args.get.option);
-    } else {
       res = config.getPath(args.get.section, args.get.option);
+    } else {
+      res = config.getString(args.get.section, args.get.option);
     }
     if (res.isDefined()) {
-      console.log(res.getValue());
+      console.log(res.required());
     } else {
       console.warn("not found");
       process.exit(1);
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-api-bankaccount.ts b/packages/taler-harness/src/integrationtests/test-libeufin-api-bankaccount.ts
index f36168301..e5e3dfe64 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-api-bankaccount.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-api-bankaccount.ts
@@ -101,7 +101,7 @@ export async function runLibeufinApiBankaccountTest(t: GlobalTestState) {
     nexus,
     "local-mock",
   );
-  let el = findNexusPayment("mock subject", transactions.data);
+  let el = findNexusPayment("mock subject", transactions);
   t.assertTrue(el instanceof Object);
 }
 
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-api-bankconnection.ts b/packages/taler-harness/src/integrationtests/test-libeufin-api-bankconnection.ts
index 912b7b2ac..243500dc9 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-api-bankconnection.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-api-bankconnection.ts
@@ -45,12 +45,12 @@ export async function runLibeufinApiBankconnectionTest(t: GlobalTestState) {
   });
 
   let connections = await LibeufinNexusApi.getAllConnections(nexus);
-  t.assertTrue(connections.data["bankConnections"].length == 1);
+  t.assertTrue(connections.bankConnections.length == 1);
 
   await LibeufinNexusApi.deleteBankConnection(nexus, {
     bankConnectionId: "bankconnection-api-test-connection",
   });
   connections = await LibeufinNexusApi.getAllConnections(nexus);
-  t.assertTrue(connections.data["bankConnections"].length == 0);
+  t.assertTrue(connections.bankConnections.length == 0);
 }
 runLibeufinApiBankconnectionTest.suites = ["libeufin"];
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-api-facade-bad-request.ts b/packages/taler-harness/src/integrationtests/test-libeufin-api-facade-bad-request.ts
index a1da9e0da..27cc81588 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-api-facade-bad-request.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-api-facade-bad-request.ts
@@ -18,15 +18,16 @@
  * Imports.
  */
 import { URL } from "@gnu-taler/taler-util";
-import axiosImp from "axios";
-import { GlobalTestState } from "../harness/harness.js";
+import { GlobalTestState, harnessHttpLib } from "../harness/harness.js";
 import {
   launchLibeufinServices,
   NexusUserBundle,
   SandboxUserBundle,
 } from "../harness/libeufin.js";
-
-const axios = axiosImp.default;
+import {
+  createPlatformHttpLib,
+  makeBasicAuthHeader,
+} from "@gnu-taler/taler-util/http";
 
 export async function runLibeufinApiFacadeBadRequestTest(t: GlobalTestState) {
   /**
@@ -50,21 +51,17 @@ export async function runLibeufinApiFacadeBadRequestTest(t: GlobalTestState) {
   console.log("malformed facade");
   const baseUrl = libeufinServices.libeufinNexus.baseUrl;
   let url = new URL("facades", baseUrl);
-  let resp = await axios.post(
-    url.href,
-    {
+  let resp = await harnessHttpLib.fetch(url.href, {
+    method: "POST",
+    body: {
       name: "malformed-facade",
       type: "taler-wire-gateway",
       config: {}, // malformation here.
     },
-    {
-      auth: {
-        username: "admin",
-        password: "test",
-      },
-      validateStatus: () => true,
+    headers: {
+      Authorization: makeBasicAuthHeader("admin", "test"),
     },
-  );
+  });
   t.assertTrue(resp.status == 400);
 }
 
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-api-facade.ts b/packages/taler-harness/src/integrationtests/test-libeufin-api-facade.ts
index 946c565d4..a819dd481 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-api-facade.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-api-facade.ts
@@ -51,20 +51,20 @@ export async function runLibeufinApiFacadeTest(t: GlobalTestState) {
     libeufinServices.libeufinNexus,
   );
   // check that original facade shows up.
-  t.assertTrue(resp.data["facades"][0]["name"] == user01nexus.twgReq["name"]);
+  t.assertTrue(resp.facades[0].name == user01nexus.twgReq["name"]);
 
-  const twgBaseUrl: string = resp.data["facades"][0]["baseUrl"];
+  const twgBaseUrl: string = resp.facades[0]["baseUrl"];
   t.assertTrue(typeof twgBaseUrl === "string");
   t.assertTrue(twgBaseUrl.startsWith("http://"));
   t.assertTrue(twgBaseUrl.endsWith("/"));
 
   // delete it.
-  resp = await LibeufinNexusApi.deleteFacade(
+  await LibeufinNexusApi.deleteFacade(
     libeufinServices.libeufinNexus,
     user01nexus.twgReq["name"],
   );
-  // check that no facades show up.
-  t.assertTrue(!resp.data.hasOwnProperty("facades"));
+  resp = await LibeufinNexusApi.getAllFacades(libeufinServices.libeufinNexus);
+  t.assertTrue(!resp.hasOwnProperty("facades"));
 }
 
 runLibeufinApiFacadeTest.suites = ["libeufin"];
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-api-permissions.ts b/packages/taler-harness/src/integrationtests/test-libeufin-api-permissions.ts
index f8f2d7d80..56443c20a 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-api-permissions.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-api-permissions.ts
@@ -46,7 +46,8 @@ export async function runLibeufinApiPermissionsTest(t: GlobalTestState) {
     user01nexus.twgTransferPermission,
   );
   let transferPermission = await LibeufinNexusApi.getAllPermissions(nexus);
-  let element = transferPermission.data["permissions"].pop();
+  let element = transferPermission["permissions"].pop();
+  t.assertTrue(!!element);
   t.assertTrue(
     element["permissionName"] == "facade.talerwiregateway.transfer" &&
       element["subjectId"] == "username-01",
@@ -58,7 +59,7 @@ export async function runLibeufinApiPermissionsTest(t: GlobalTestState) {
   await LibeufinNexusApi.postPermission(nexus, denyTransfer);
 
   transferPermission = await LibeufinNexusApi.getAllPermissions(nexus);
-  t.assertTrue(transferPermission.data["permissions"].length == 0);
+  t.assertTrue(transferPermission["permissions"].length == 0);
 }
 
 runLibeufinApiPermissionsTest.suites = ["libeufin"];
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-api-sandbox-transactions.ts b/packages/taler-harness/src/integrationtests/test-libeufin-api-sandbox-transactions.ts
index f1ff69a6d..6cfc55aa6 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-api-sandbox-transactions.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-api-sandbox-transactions.ts
@@ -64,6 +64,6 @@ export async function runLibeufinApiSandboxTransactionsTest(
     sandbox,
     "mock-account",
   );
-  t.assertAmountEquals(ret.data.balance, "EUR:2.1");
+  t.assertAmountEquals(ret.balance, "EUR:2.1");
 }
 runLibeufinApiSandboxTransactionsTest.suites = ["libeufin"];
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-api-scheduling.ts b/packages/taler-harness/src/integrationtests/test-libeufin-api-scheduling.ts
index 95f4bfaa0..15ed2ab78 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-api-scheduling.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-api-scheduling.ts
@@ -54,19 +54,19 @@ export async function runLibeufinApiSchedulingTest(t: GlobalTestState) {
       rangeType: "all",
     },
   });
-  let resp = await LibeufinNexusApi.getTasks(
+  let resp = await LibeufinNexusApi.getTask(
     nexus,
     user01nexus.localAccountName,
     "test-task",
   );
-  t.assertTrue(resp.data["taskName"] == "test-task");
+  t.assertTrue(resp.taskName == "test-task");
   await LibeufinNexusApi.deleteTask(
     nexus,
     user01nexus.localAccountName,
     "test-task",
   );
   try {
-    await LibeufinNexusApi.getTasks(
+    await LibeufinNexusApi.getTask(
       nexus,
       user01nexus.localAccountName,
       "test-task",
@@ -82,19 +82,19 @@ export async function runLibeufinApiSchedulingTest(t: GlobalTestState) {
     type: "submit",
     params: {},
   });
-  resp = await LibeufinNexusApi.getTasks(
+  resp = await LibeufinNexusApi.getTask(
     nexus,
     user01nexus.localAccountName,
     "test-task",
   );
-  t.assertTrue(resp.data["taskName"] == "test-task");
+  t.assertTrue(resp.taskName == "test-task");
   await LibeufinNexusApi.deleteTask(
     nexus,
     user01nexus.localAccountName,
     "test-task",
   );
   try {
-    await LibeufinNexusApi.getTasks(
+    await LibeufinNexusApi.getTask(
       nexus,
       user01nexus.localAccountName,
       "test-task",
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-api-users.ts b/packages/taler-harness/src/integrationtests/test-libeufin-api-users.ts
index bc3103c7e..662b22bbe 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-api-users.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-api-users.ts
@@ -56,8 +56,8 @@ export async function runLibeufinApiUsersTest(t: GlobalTestState) {
       password: "got-changed",
     },
   });
-  console.log(resp.data);
-  t.assertTrue(resp.data["username"] == "one" && !resp.data["superuser"]);
+  console.log(resp);
+  t.assertTrue(resp["username"] == "one" && !resp["superuser"]);
 }
 
 runLibeufinApiUsersTest.suites = ["libeufin"];
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-c5x.ts b/packages/taler-harness/src/integrationtests/test-libeufin-c5x.ts
index c6dfca99b..5097bc4d3 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-c5x.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-c5x.ts
@@ -79,7 +79,7 @@ export async function runLibeufinC5xTest(t: GlobalTestState) {
     libeufinServices.libeufinNexus,
     user01nexus.localAccountName,
   );
-  t.assertTrue(nexusTxs.data["transactions"].length == 0);
+  t.assertTrue(nexusTxs["transactions"].length == 0);
 
   // Addressing one payment to user 01
   await libeufinServices.libeufinSandbox.makeTransaction(
@@ -95,8 +95,8 @@ export async function runLibeufinC5xTest(t: GlobalTestState) {
     "all", // range
     "report", // C52
   );
-  t.assertTrue(expectOne.data.newTransactions == 1);
-  t.assertTrue(expectOne.data.downloadedTransactions == 1);
+  t.assertTrue(expectOne.newTransactions == 1);
+  t.assertTrue(expectOne.downloadedTransactions == 1);
 
   /* Expect zero payments being downloaded because the
    * previous request consumed already the one pending
@@ -108,8 +108,8 @@ export async function runLibeufinC5xTest(t: GlobalTestState) {
     "all", // range
     "report", // C52
   );
-  t.assertTrue(expectZero.data.newTransactions == 0);
-  t.assertTrue(expectZero.data.downloadedTransactions == 0);
+  t.assertTrue(expectZero.newTransactions == 0);
+  t.assertTrue(expectZero.downloadedTransactions == 0);
 
   /**
    * A statement should still account zero payments because
@@ -121,8 +121,8 @@ export async function runLibeufinC5xTest(t: GlobalTestState) {
     "all", // range
     "statement", // C53
   );
-  t.assertTrue(expectZero.data.newTransactions == 0);
-  t.assertTrue(expectZero.data.downloadedTransactions == 0);
+  t.assertTrue(expectZero.newTransactions == 0);
+  t.assertTrue(expectZero.downloadedTransactions == 0);
 
   /**
    * Ticking now.  That books any pending transaction.
@@ -141,7 +141,7 @@ export async function runLibeufinC5xTest(t: GlobalTestState) {
     "all", // range
     "statement", // C53
   );
-  t.assertTrue(expectOne.data.downloadedTransactions == 1);
-  t.assertTrue(expectOne.data.newTransactions == 0);
+  t.assertTrue(expectOne.downloadedTransactions == 1);
+  t.assertTrue(expectOne.newTransactions == 0);
 }
 runLibeufinC5xTest.suites = ["libeufin"];
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-facade-anastasis.ts b/packages/taler-harness/src/integrationtests/test-libeufin-facade-anastasis.ts
index 10c73fed5..0efd55f44 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-facade-anastasis.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-facade-anastasis.ts
@@ -53,9 +53,9 @@ export async function runLibeufinAnastasisFacadeTest(t: GlobalTestState) {
   );
   // check that original facade shows up.
   t.assertTrue(
-    resp.data["facades"][0]["name"] == user01nexus.anastasisReq["name"],
+    resp["facades"][0]["name"] == user01nexus.anastasisReq["name"],
   );
-  const anastasisBaseUrl: string = resp.data["facades"][0]["baseUrl"];
+const anastasisBaseUrl: string = resp["facades"][0]["baseUrl"];
   t.assertTrue(typeof anastasisBaseUrl === "string");
   t.assertTrue(anastasisBaseUrl.startsWith("http://"));
   t.assertTrue(anastasisBaseUrl.endsWith("/"));
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-refund.ts b/packages/taler-harness/src/integrationtests/test-libeufin-refund.ts
index 9d90121a0..d37363bab 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-refund.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-refund.ts
@@ -77,7 +77,7 @@ export async function runLibeufinRefundTest(t: GlobalTestState) {
     libeufinServices.libeufinNexus,
     user01nexus.localAccountName,
   );
-  t.assertTrue(nexusTxs.data["transactions"].length == 1);
+  t.assertTrue(nexusTxs["transactions"].length == 1);
 
   // Submit the reimbursement
   await LibeufinNexusApi.submitInitiatedPayment(
diff --git a/packages/taler-harness/src/integrationtests/test-libeufin-sandbox-wire-transfer-cli.ts b/packages/taler-harness/src/integrationtests/test-libeufin-sandbox-wire-transfer-cli.ts
index e6b074d3f..be467e2f1 100644
--- a/packages/taler-harness/src/integrationtests/test-libeufin-sandbox-wire-transfer-cli.ts
+++ b/packages/taler-harness/src/integrationtests/test-libeufin-sandbox-wire-transfer-cli.ts
@@ -79,7 +79,7 @@ export async function runLibeufinSandboxWireTransferCliTest(
     sandbox,
     "mock-account-2",
   );
-  console.log(ret.data.balance);
-  t.assertTrue(ret.data.balance == "EUR:1.89");
+  console.log(ret.balance);
+  t.assertTrue(ret.balance == "EUR:1.89");
 }
 runLibeufinSandboxWireTransferCliTest.suites = ["libeufin"];
diff --git a/packages/taler-harness/src/integrationtests/test-merchant-exchange-confusion.ts b/packages/taler-harness/src/integrationtests/test-merchant-exchange-confusion.ts
index 2fccd0b97..e18cd7a0f 100644
--- a/packages/taler-harness/src/integrationtests/test-merchant-exchange-confusion.ts
+++ b/packages/taler-harness/src/integrationtests/test-merchant-exchange-confusion.ts
@@ -23,8 +23,6 @@ import {
   PreparePayResultType,
 } from "@gnu-taler/taler-util";
 import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
-import axiosImp from "axios";
-const axios = axiosImp.default;
 import { URL } from "url";
 import { defaultCoinConfig } from "../harness/denomStructures.js";
 import {
@@ -36,6 +34,7 @@ import {
   ExchangeService,
   getPayto,
   GlobalTestState,
+  harnessHttpLib,
   MerchantPrivateApi,
   MerchantService,
   setupDb,
@@ -45,6 +44,7 @@ import {
   FaultyMerchantTestEnvironment,
   withdrawViaBank,
 } from "../harness/helpers.js";
+import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
 
 /**
  * Run a test case with a simple TESTKUDOS Taler environment, consisting
@@ -186,9 +186,7 @@ export async function runMerchantExchangeConfusionTest(t: GlobalTestState) {
   t.assertTrue(orderStatus.already_paid_order_id === undefined);
   let publicOrderStatusUrl = orderStatus.order_status_url;
 
-  let publicOrderStatusResp = await axios.get(publicOrderStatusUrl, {
-    validateStatus: () => true,
-  });
+  let publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -197,7 +195,7 @@ export async function runMerchantExchangeConfusionTest(t: GlobalTestState) {
   }
 
   let pubUnpaidStatus = codecForMerchantOrderStatusUnpaid().decode(
-    publicOrderStatusResp.data,
+    await publicOrderStatusResp.json(),
   );
 
   console.log(pubUnpaidStatus);
@@ -221,9 +219,7 @@ export async function runMerchantExchangeConfusionTest(t: GlobalTestState) {
 
   console.log("requesting", orderUrlWithHash.href);
 
-  publicOrderStatusResp = await axios.get(orderUrlWithHash.href, {
-    validateStatus: () => true,
-  });
+  publicOrderStatusResp = await harnessHttpLib.fetch(orderUrlWithHash.href);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -232,7 +228,7 @@ export async function runMerchantExchangeConfusionTest(t: GlobalTestState) {
   }
 
   pubUnpaidStatus = codecForMerchantOrderStatusUnpaid().decode(
-    publicOrderStatusResp.data,
+    await publicOrderStatusResp.json(),
   );
 
   const confirmPayRes = await wallet.client.call(
diff --git a/packages/taler-harness/src/integrationtests/test-merchant-instances-delete.ts b/packages/taler-harness/src/integrationtests/test-merchant-instances-delete.ts
index 09231cdd8..e6e5bff76 100644
--- a/packages/taler-harness/src/integrationtests/test-merchant-instances-delete.ts
+++ b/packages/taler-harness/src/integrationtests/test-merchant-instances-delete.ts
@@ -17,9 +17,7 @@
 /**
  * Imports.
  */
-import { URL } from "@gnu-taler/taler-util";
-import axiosImp from "axios";
-const axios = axiosImp.default;
+import { TalerError, URL } from "@gnu-taler/taler-util";
 import {
   ExchangeService,
   GlobalTestState,
@@ -27,7 +25,9 @@ import {
   MerchantService,
   setupDb,
   getPayto,
+  harnessHttpLib,
 } from "../harness/harness.js";
+import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
 
 /**
  * Test instance deletion and authentication for it
@@ -61,15 +61,17 @@ export async function runMerchantInstancesDeleteTest(t: GlobalTestState) {
   const baseUrl = merchant.makeInstanceBaseUrl();
 
   {
-    const r = await axios.get(new URL("config", baseUrl).href);
-    console.log(r.data);
-    t.assertDeepEqual(r.data.currency, "TESTKUDOS");
+    const r = await harnessHttpLib.fetch(new URL("config", baseUrl).href);
+    const data = await r.json();
+    console.log(data);
+    t.assertDeepEqual(data.currency, "TESTKUDOS");
   }
 
   // Instances should initially be empty
   {
-    const r = await axios.get(new URL("management/instances", baseUrl).href);
-    t.assertDeepEqual(r.data.instances, []);
+    const r = await harnessHttpLib.fetch(new URL("management/instances", baseUrl).href);
+    const data = await r.json();
+    t.assertDeepEqual(data.instances, []);
   }
 
   // Add an instance, no auth!
@@ -121,8 +123,8 @@ export async function runMerchantInstancesDeleteTest(t: GlobalTestState) {
       await unauthMerchantClient.deleteInstance("myinst");
     });
     console.log("Got expected exception", exc);
-    t.assertAxiosError(exc);
-    t.assertDeepEqual(exc.response?.status, 401);
+    t.assertTrue(exc instanceof TalerError);
+    t.assertDeepEqual(exc.errorDetail.httpStatusCode, 401);
   }
 }
 
diff --git a/packages/taler-harness/src/integrationtests/test-merchant-instances-urls.ts b/packages/taler-harness/src/integrationtests/test-merchant-instances-urls.ts
index 534b35278..18a09c76b 100644
--- a/packages/taler-harness/src/integrationtests/test-merchant-instances-urls.ts
+++ b/packages/taler-harness/src/integrationtests/test-merchant-instances-urls.ts
@@ -18,8 +18,6 @@
  * Imports.
  */
 import { Duration } from "@gnu-taler/taler-util";
-import axiosImp from "axios";
-const axios = axiosImp.default;
 import {
   ExchangeService,
   GlobalTestState,
@@ -27,14 +25,14 @@ import {
   MerchantService,
   setupDb,
   getPayto,
+  harnessHttpLib,
 } from "../harness/harness.js";
+import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
 
 /**
  * Do basic checks on instance management and authentication.
  */
 export async function runMerchantInstancesUrlsTest(t: GlobalTestState) {
-  // Set up test environment
-
   const db = await setupDb(t);
 
   const exchange = ExchangeService.create(t, {
@@ -111,11 +109,10 @@ export async function runMerchantInstancesUrlsTest(t: GlobalTestState) {
   });
 
   async function check(url: string, token: string, expectedStatus: number) {
-    const resp = await axios.get(url, {
+    const resp = await harnessHttpLib.fetch(url, {
       headers: {
         Authorization: `Bearer ${token}`,
       },
-      validateStatus: () => true,
     });
     console.log(
       `checking ${url}, expected ${expectedStatus}, got ${resp.status}`,
diff --git a/packages/taler-harness/src/integrationtests/test-merchant-instances.ts b/packages/taler-harness/src/integrationtests/test-merchant-instances.ts
index 78626ea3d..f7d89c543 100644
--- a/packages/taler-harness/src/integrationtests/test-merchant-instances.ts
+++ b/packages/taler-harness/src/integrationtests/test-merchant-instances.ts
@@ -18,8 +18,6 @@
  * Imports.
  */
 import { URL } from "@gnu-taler/taler-util";
-import axiosImp from "axios";
-const axios = axiosImp.default;
 import {
   ExchangeService,
   GlobalTestState,
@@ -27,7 +25,9 @@ import {
   MerchantService,
   setupDb,
   getPayto,
+  harnessHttpLib,
 } from "../harness/harness.js";
+import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
 
 /**
  * Do basic checks on instance management and authentication.
@@ -61,15 +61,19 @@ export async function runMerchantInstancesTest(t: GlobalTestState) {
   const baseUrl = merchant.makeInstanceBaseUrl();
 
   {
-    const r = await axios.get(new URL("config", baseUrl).href);
-    console.log(r.data);
-    t.assertDeepEqual(r.data.currency, "TESTKUDOS");
+    const r = await harnessHttpLib.fetch(new URL("config", baseUrl).href);
+    const data = await r.json();
+    console.log(data);
+    t.assertDeepEqual(data.currency, "TESTKUDOS");
   }
 
   // Instances should initially be empty
   {
-    const r = await axios.get(new URL("management/instances", baseUrl).href);
-    t.assertDeepEqual(r.data.instances, []);
+    const r = await harnessHttpLib.fetch(
+      new URL("management/instances", baseUrl).href,
+    );
+    const data = await r.json();
+    t.assertDeepEqual(data.instances, []);
   }
 
   // Add an instance, no auth!
@@ -104,11 +108,14 @@ export async function runMerchantInstancesTest(t: GlobalTestState) {
   // Check that a "malformed" bearer Authorization header gets ignored
   {
     const url = merchant.makeInstanceBaseUrl();
-    const resp = await axios.get(new URL("management/instances", url).href, {
-      headers: {
-        Authorization: "foo bar-baz",
+    const resp = await harnessHttpLib.fetch(
+      new URL("management/instances", url).href,
+      {
+        headers: {
+          Authorization: "foo bar-baz",
+        },
       },
-    });
+    );
     t.assertDeepEqual(resp.status, 200);
   }
 
@@ -130,9 +137,7 @@ export async function runMerchantInstancesTest(t: GlobalTestState) {
   });
 
   console.log(exc);
-
-  t.assertAxiosError(exc);
-  t.assertTrue(exc.response?.status === 401);
+  t.assertTrue(exc.errorDetail.httpStatusCode === 401);
 
   merchantClient = new MerchantApiClient(merchant.makeInstanceBaseUrl(), {
     method: "token",
@@ -145,12 +150,15 @@ export async function runMerchantInstancesTest(t: GlobalTestState) {
   // Now, try some variations.
   {
     const url = merchant.makeInstanceBaseUrl();
-    const resp = await axios.get(new URL("management/instances", url).href, {
-      headers: {
-        // Note the spaces
-        Authorization: "Bearer     secret-token:foobar",
+    const resp = await harnessHttpLib.fetch(
+      new URL("management/instances", url).href,
+      {
+        headers: {
+          // Note the spaces
+          Authorization: "Bearer     secret-token:foobar",
+        },
       },
-    });
+    );
     t.assertDeepEqual(resp.status, 200);
   }
 
@@ -176,7 +184,7 @@ export async function runMerchantInstancesTest(t: GlobalTestState) {
       await unauthMerchantClient.deleteInstance("myinst");
     });
     console.log(exc);
-    t.assertAxiosError(exc);
+    t.assertTrue(exc.errorDetail.httpStatusCode === 401);
     t.assertDeepEqual(exc.response?.status, 401);
   }
 }
diff --git a/packages/taler-harness/src/integrationtests/test-merchant-longpolling.ts b/packages/taler-harness/src/integrationtests/test-merchant-longpolling.ts
index 59f23fe5d..8d271c5d1 100644
--- a/packages/taler-harness/src/integrationtests/test-merchant-longpolling.ts
+++ b/packages/taler-harness/src/integrationtests/test-merchant-longpolling.ts
@@ -24,20 +24,18 @@ import {
   codecForMerchantOrderStatusUnpaid,
 } from "@gnu-taler/taler-util";
 import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
-import axiosImp from "axios";
-import { GlobalTestState, MerchantPrivateApi } from "../harness/harness.js";
+import { GlobalTestState, MerchantPrivateApi, harnessHttpLib } from "../harness/harness.js";
 import {
   createSimpleTestkudosEnvironmentV2,
-  withdrawViaBankV2
+  withdrawViaBankV2,
 } from "../harness/helpers.js";
-const axios = axiosImp.default;
+import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
 
 /**
  * Run test for basic, bank-integrated withdrawal.
  */
 export async function runMerchantLongpollingTest(t: GlobalTestState) {
   // Set up test environment
-
   const { walletClient, bank, exchange, merchant } =
     await createSimpleTestkudosEnvironmentV2(t);
 
@@ -83,9 +81,7 @@ export async function runMerchantLongpollingTest(t: GlobalTestState) {
   // First, request order status without longpolling
   {
     console.log("requesting", publicOrderStatusUrl.href);
-    let publicOrderStatusResp = await axios.get(publicOrderStatusUrl.href, {
-      validateStatus: () => true,
-    });
+    let publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl.href);
 
     if (publicOrderStatusResp.status != 402) {
       throw Error(
@@ -98,9 +94,7 @@ export async function runMerchantLongpollingTest(t: GlobalTestState) {
   publicOrderStatusUrl.searchParams.set("timeout_ms", "500");
 
   console.log("requesting", publicOrderStatusUrl.href);
-  let publicOrderStatusResp = await axios.get(publicOrderStatusUrl.href, {
-    validateStatus: () => true,
-  });
+  let publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl.href);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -109,7 +103,7 @@ export async function runMerchantLongpollingTest(t: GlobalTestState) {
   }
 
   let pubUnpaidStatus = codecForMerchantOrderStatusUnpaid().decode(
-    publicOrderStatusResp.data,
+    await publicOrderStatusResp.json(),
   );
 
   console.log(pubUnpaidStatus);
@@ -135,9 +129,7 @@ export async function runMerchantLongpollingTest(t: GlobalTestState) {
     preparePayResp.contractTermsHash,
   );
 
-  let publicOrderStatusPromise = axios.get(publicOrderStatusUrl.href, {
-    validateStatus: () => true,
-  });
+  let publicOrderStatusPromise = harnessHttpLib.fetch(publicOrderStatusUrl.href);
 
   t.assertTrue(preparePayResp.status === PreparePayResultType.PaymentPossible);
 
@@ -152,15 +144,12 @@ export async function runMerchantLongpollingTest(t: GlobalTestState) {
   }
 
   pubUnpaidStatus = codecForMerchantOrderStatusUnpaid().decode(
-    publicOrderStatusResp.data,
+    await publicOrderStatusResp.json(),
   );
 
-  const confirmPayRes = await walletClient.call(
-    WalletApiOperation.ConfirmPay,
-    {
-      proposalId: proposalId,
-    },
-  );
+  const confirmPayRes = await walletClient.call(WalletApiOperation.ConfirmPay, {
+    proposalId: proposalId,
+  });
 
   t.assertTrue(confirmPayRes.type === ConfirmPayResultType.Done);
 }
diff --git a/packages/taler-harness/src/integrationtests/test-merchant-refund-api.ts b/packages/taler-harness/src/integrationtests/test-merchant-refund-api.ts
index 5d9b23fa7..8efac1fc1 100644
--- a/packages/taler-harness/src/integrationtests/test-merchant-refund-api.ts
+++ b/packages/taler-harness/src/integrationtests/test-merchant-refund-api.ts
@@ -17,12 +17,14 @@
 /**
  * Imports.
  */
+import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
 import {
   GlobalTestState,
   MerchantPrivateApi,
   MerchantServiceInterface,
   WalletCli,
   ExchangeServiceInterface,
+  harnessHttpLib,
 } from "../harness/harness.js";
 import {
   createSimpleTestkudosEnvironment,
@@ -34,8 +36,6 @@ import {
   PreparePayResultType,
   Duration,
 } from "@gnu-taler/taler-util";
-import axiosImp from "axios";
-const axios = axiosImp.default;
 import {
   WalletApiOperation,
   BankServiceHandle,
@@ -136,23 +136,19 @@ async function testRefundApiWithFulfillmentUrl(
     preparePayResult.contractTermsHash,
   );
 
-  let publicOrderStatusResp = await axios.get(publicOrderStatusUrl.href, {
-    validateStatus: () => true,
-  });
-  console.log(publicOrderStatusResp.data);
+  let publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl.href);
+  const respData = await publicOrderStatusResp.json();
   t.assertTrue(publicOrderStatusResp.status === 200);
-  t.assertAmountEquals(publicOrderStatusResp.data.refund_amount, "TESTKUDOS:5");
+  t.assertAmountEquals(respData.refund_amount, "TESTKUDOS:5");
 
   publicOrderStatusUrl = new URL(
     `orders/${orderId}`,
     merchant.makeInstanceBaseUrl(),
   );
   console.log(`requesting order status via '${publicOrderStatusUrl.href}'`);
-  publicOrderStatusResp = await axios.get(publicOrderStatusUrl.href, {
-    validateStatus: () => true,
-  });
+  publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl.href);
   console.log(publicOrderStatusResp.status);
-  console.log(publicOrderStatusResp.data);
+  console.log(await publicOrderStatusResp.json());
   // We didn't give any authentication, so we should get a fulfillment URL back
   t.assertTrue(publicOrderStatusResp.status === 403);
 }
@@ -252,22 +248,20 @@ async function testRefundApiWithFulfillmentMessage(
     preparePayResult.contractTermsHash,
   );
 
-  let publicOrderStatusResp = await axios.get(publicOrderStatusUrl.href, {
-    validateStatus: () => true,
-  });
-  console.log(publicOrderStatusResp.data);
+  let publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl.href);
+  let respData = await publicOrderStatusResp.json();
+  console.log(respData);
   t.assertTrue(publicOrderStatusResp.status === 200);
-  t.assertAmountEquals(publicOrderStatusResp.data.refund_amount, "TESTKUDOS:5");
+  t.assertAmountEquals(respData.refund_amount, "TESTKUDOS:5");
 
   publicOrderStatusUrl = new URL(
     `orders/${orderId}`,
     merchant.makeInstanceBaseUrl(),
   );
 
-  publicOrderStatusResp = await axios.get(publicOrderStatusUrl.href, {
-    validateStatus: () => true,
-  });
-  console.log(publicOrderStatusResp.data);
+  publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl.href);
+  respData = await publicOrderStatusResp.json();
+  console.log(respData);
   // We didn't give any authentication, so we should get a fulfillment URL back
   t.assertTrue(publicOrderStatusResp.status === 403);
 }
diff --git a/packages/taler-harness/src/integrationtests/test-merchant-spec-public-orders.ts b/packages/taler-harness/src/integrationtests/test-merchant-spec-public-orders.ts
index 975ba707b..fca368dad 100644
--- a/packages/taler-harness/src/integrationtests/test-merchant-spec-public-orders.ts
+++ b/packages/taler-harness/src/integrationtests/test-merchant-spec-public-orders.ts
@@ -24,7 +24,6 @@ import {
   encodeCrock,
   getRandomBytes,
 } from "@gnu-taler/taler-util";
-import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
 import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
 import {
   BankService,
@@ -33,17 +32,13 @@ import {
   MerchantPrivateApi,
   MerchantService,
   WalletCli,
+  harnessHttpLib,
 } from "../harness/harness.js";
 import {
   createSimpleTestkudosEnvironment,
   withdrawViaBank,
 } from "../harness/helpers.js";
 
-const httpLib = createPlatformHttpLib({
-  allowHttp: true,
-  enableThrottling: false,
-});
-
 interface Context {
   merchant: MerchantService;
   merchantBaseUrl: string;
@@ -51,6 +46,8 @@ interface Context {
   exchange: ExchangeService;
 }
 
+const httpLib = harnessHttpLib;
+
 async function testWithClaimToken(
   t: GlobalTestState,
   c: Context,
diff --git a/packages/taler-harness/src/integrationtests/test-pay-paid.ts b/packages/taler-harness/src/integrationtests/test-pay-paid.ts
index 2ef91e4a8..a377b7237 100644
--- a/packages/taler-harness/src/integrationtests/test-pay-paid.ts
+++ b/packages/taler-harness/src/integrationtests/test-pay-paid.ts
@@ -17,7 +17,7 @@
 /**
  * Imports.
  */
-import { GlobalTestState, MerchantPrivateApi } from "../harness/harness.js";
+import { GlobalTestState, MerchantPrivateApi, harnessHttpLib } from "../harness/harness.js";
 import {
   withdrawViaBank,
   createFaultInjectedMerchantTestkudosEnvironment,
@@ -28,8 +28,6 @@ import {
   ConfirmPayResultType,
   URL,
 } from "@gnu-taler/taler-util";
-import axiosImp from "axios";
-const axios = axiosImp.default;
 import { FaultInjectionRequestContext } from "../harness/faultInjection.js";
 import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
 
@@ -86,9 +84,7 @@ export async function runPayPaidTest(t: GlobalTestState) {
   t.assertTrue(orderStatus.already_paid_order_id === undefined);
   let publicOrderStatusUrl = orderStatus.order_status_url;
 
-  let publicOrderStatusResp = await axios.get(publicOrderStatusUrl, {
-    validateStatus: () => true,
-  });
+  let publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -97,7 +93,7 @@ export async function runPayPaidTest(t: GlobalTestState) {
   }
 
   let pubUnpaidStatus = codecForMerchantOrderStatusUnpaid().decode(
-    publicOrderStatusResp.data,
+    publicOrderStatusResp.json(),
   );
 
   console.log(pubUnpaidStatus);
@@ -113,9 +109,7 @@ export async function runPayPaidTest(t: GlobalTestState) {
 
   const proposalId = preparePayResp.proposalId;
 
-  publicOrderStatusResp = await axios.get(publicOrderStatusUrl, {
-    validateStatus: () => true,
-  });
+  publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -124,7 +118,7 @@ export async function runPayPaidTest(t: GlobalTestState) {
   }
 
   pubUnpaidStatus = codecForMerchantOrderStatusUnpaid().decode(
-    publicOrderStatusResp.data,
+    publicOrderStatusResp.json(),
   );
 
   const confirmPayRes = await wallet.client.call(
@@ -136,14 +130,12 @@ export async function runPayPaidTest(t: GlobalTestState) {
 
   t.assertTrue(confirmPayRes.type === ConfirmPayResultType.Done);
 
-  publicOrderStatusResp = await axios.get(publicOrderStatusUrl, {
-    validateStatus: () => true,
-  });
+  publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl);
 
-  console.log(publicOrderStatusResp.data);
+  console.log(publicOrderStatusResp.json());
 
   if (publicOrderStatusResp.status != 200) {
-    console.log(publicOrderStatusResp.data);
+    console.log(publicOrderStatusResp.json());
     throw Error(
       `expected status 200 (after paying), but got ${publicOrderStatusResp.status}`,
     );
diff --git a/packages/taler-harness/src/integrationtests/test-payment-abort.ts b/packages/taler-harness/src/integrationtests/test-payment-abort.ts
index 40438c583..05ca7a543 100644
--- a/packages/taler-harness/src/integrationtests/test-payment-abort.ts
+++ b/packages/taler-harness/src/integrationtests/test-payment-abort.ts
@@ -17,14 +17,12 @@
 /**
  * Imports.
  */
-import { GlobalTestState, MerchantPrivateApi } from "../harness/harness.js";
+import { GlobalTestState, MerchantPrivateApi, harnessHttpLib } from "../harness/harness.js";
 import {
   withdrawViaBank,
   createFaultInjectedMerchantTestkudosEnvironment,
 } from "../harness/helpers.js";
-import {
-  FaultInjectionRequestContext,
-} from "../harness/faultInjection.js";
+import { FaultInjectionRequestContext } from "../harness/faultInjection.js";
 import {
   codecForMerchantOrderStatusUnpaid,
   ConfirmPayResultType,
@@ -35,9 +33,6 @@ import {
   URL,
 } from "@gnu-taler/taler-util";
 import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
-import axiosImp from "axios";
-
-const axios = axiosImp.default;
 
 export async function runPaymentAbortTest(t: GlobalTestState) {
   // Set up test environment
@@ -75,9 +70,7 @@ export async function runPaymentAbortTest(t: GlobalTestState) {
   t.assertTrue(orderStatus.already_paid_order_id === undefined);
   let publicOrderStatusUrl = orderStatus.order_status_url;
 
-  let publicOrderStatusResp = await axios.get(publicOrderStatusUrl, {
-    validateStatus: () => true,
-  });
+  let publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -86,7 +79,7 @@ export async function runPaymentAbortTest(t: GlobalTestState) {
   }
 
   let pubUnpaidStatus = codecForMerchantOrderStatusUnpaid().decode(
-    publicOrderStatusResp.data,
+    publicOrderStatusResp.json(),
   );
 
   console.log(pubUnpaidStatus);
@@ -102,9 +95,7 @@ export async function runPaymentAbortTest(t: GlobalTestState) {
 
   const proposalId = preparePayResp.proposalId;
 
-  publicOrderStatusResp = await axios.get(publicOrderStatusUrl, {
-    validateStatus: () => true,
-  });
+  publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -113,7 +104,7 @@ export async function runPaymentAbortTest(t: GlobalTestState) {
   }
 
   pubUnpaidStatus = codecForMerchantOrderStatusUnpaid().decode(
-    publicOrderStatusResp.data,
+    publicOrderStatusResp.json(),
   );
 
   faultyMerchant.faultProxy.addFault({
diff --git a/packages/taler-harness/src/integrationtests/test-payment-claim.ts b/packages/taler-harness/src/integrationtests/test-payment-claim.ts
index eb219c1e7..3e52cb5dd 100644
--- a/packages/taler-harness/src/integrationtests/test-payment-claim.ts
+++ b/packages/taler-harness/src/integrationtests/test-payment-claim.ts
@@ -42,13 +42,15 @@ export async function runPaymentClaimTest(t: GlobalTestState) {
 
   // Withdraw digital cash into the wallet.
 
-  await withdrawViaBankV2(t, {
+  const wres = await withdrawViaBankV2(t, {
     walletClient,
     bank,
     exchange,
     amount: "TESTKUDOS:20",
   });
 
+  await wres.withdrawalFinishedCond;
+
   // Set up order.
 
   const orderResp = await MerchantPrivateApi.createOrder(merchant, "default", {
diff --git a/packages/taler-harness/src/integrationtests/test-payment-idempotency.ts b/packages/taler-harness/src/integrationtests/test-payment-idempotency.ts
index e16cf9dd1..6373c2393 100644
--- a/packages/taler-harness/src/integrationtests/test-payment-idempotency.ts
+++ b/packages/taler-harness/src/integrationtests/test-payment-idempotency.ts
@@ -37,13 +37,15 @@ export async function runPaymentIdempotencyTest(t: GlobalTestState) {
 
   // Withdraw digital cash into the wallet.
 
-  await withdrawViaBankV2(t, {
+  const wres = await withdrawViaBankV2(t, {
     walletClient,
     bank,
     exchange,
     amount: "TESTKUDOS:20",
   });
 
+  await wres.withdrawalFinishedCond;
+
   // Set up order.
 
   const orderResp = await MerchantPrivateApi.createOrder(merchant, "default", {
diff --git a/packages/taler-harness/src/integrationtests/test-payment-template.ts b/packages/taler-harness/src/integrationtests/test-payment-template.ts
index 172791648..707be52e1 100644
--- a/packages/taler-harness/src/integrationtests/test-payment-template.ts
+++ b/packages/taler-harness/src/integrationtests/test-payment-template.ts
@@ -50,7 +50,8 @@ export async function runPaymentTemplateTest(t: GlobalTestState) {
 
   // Withdraw digital cash into the wallet.
 
-  await withdrawViaBankV2(t, { walletClient, bank, exchange, amount: "TESTKUDOS:20" });
+  const wres = await withdrawViaBankV2(t, { walletClient, bank, exchange, amount: "TESTKUDOS:20" });
+  await wres.withdrawalFinishedCond;
 
   // Request a template payment
 
diff --git a/packages/taler-harness/src/integrationtests/test-payment-transient.ts b/packages/taler-harness/src/integrationtests/test-payment-transient.ts
index 33a9716d5..c2a8e37c5 100644
--- a/packages/taler-harness/src/integrationtests/test-payment-transient.ts
+++ b/packages/taler-harness/src/integrationtests/test-payment-transient.ts
@@ -17,23 +17,22 @@
 /**
  * Imports.
  */
-import { GlobalTestState, MerchantPrivateApi } from "../harness/harness.js";
 import {
-  withdrawViaBank,
-  createFaultInjectedMerchantTestkudosEnvironment,
-} from "../harness/helpers.js";
-import { FaultInjectionResponseContext } from "../harness/faultInjection.js";
-import {
-  codecForMerchantOrderStatusUnpaid,
   ConfirmPayResultType,
   PreparePayResultType,
   TalerErrorCode,
   TalerErrorDetail,
   URL,
+  codecForMerchantOrderStatusUnpaid,
 } from "@gnu-taler/taler-util";
 import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
-import axiosImp from "axios";
-const axios = axiosImp.default;
+import { FaultInjectionResponseContext } from "../harness/faultInjection.js";
+import { GlobalTestState, MerchantPrivateApi, harnessHttpLib } from "../harness/harness.js";
+import {
+  createFaultInjectedMerchantTestkudosEnvironment,
+  withdrawViaBank,
+} from "../harness/helpers.js";
+
 
 /**
  * Run test for a payment where the merchant has a transient
@@ -75,9 +74,7 @@ export async function runPaymentTransientTest(t: GlobalTestState) {
   t.assertTrue(orderStatus.already_paid_order_id === undefined);
   let publicOrderStatusUrl = orderStatus.order_status_url;
 
-  let publicOrderStatusResp = await axios.get(publicOrderStatusUrl, {
-    validateStatus: () => true,
-  });
+  let publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -86,7 +83,7 @@ export async function runPaymentTransientTest(t: GlobalTestState) {
   }
 
   let pubUnpaidStatus = codecForMerchantOrderStatusUnpaid().decode(
-    publicOrderStatusResp.data,
+    publicOrderStatusResp.json(),
   );
 
   console.log(pubUnpaidStatus);
@@ -102,9 +99,7 @@ export async function runPaymentTransientTest(t: GlobalTestState) {
 
   const proposalId = preparePayResp.proposalId;
 
-  publicOrderStatusResp = await axios.get(publicOrderStatusUrl, {
-    validateStatus: () => true,
-  });
+  publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -113,7 +108,7 @@ export async function runPaymentTransientTest(t: GlobalTestState) {
   }
 
   pubUnpaidStatus = codecForMerchantOrderStatusUnpaid().decode(
-    publicOrderStatusResp.data,
+    publicOrderStatusResp.json(),
   );
 
   let faultInjected = false;
@@ -165,14 +160,12 @@ export async function runPaymentTransientTest(t: GlobalTestState) {
   // Now ask the merchant if paid
 
   console.log("requesting", publicOrderStatusUrl);
-  publicOrderStatusResp = await axios.get(publicOrderStatusUrl, {
-    validateStatus: () => true,
-  });
+  publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl);
 
-  console.log(publicOrderStatusResp.data);
+  console.log(publicOrderStatusResp.json());
 
   if (publicOrderStatusResp.status != 200) {
-    console.log(publicOrderStatusResp.data);
+    console.log(publicOrderStatusResp.json());
     throw Error(
       `expected status 200 (after paying), but got ${publicOrderStatusResp.status}`,
     );
diff --git a/packages/taler-harness/src/integrationtests/test-paywall-flow.ts b/packages/taler-harness/src/integrationtests/test-paywall-flow.ts
index b0477a049..5f63d4fac 100644
--- a/packages/taler-harness/src/integrationtests/test-paywall-flow.ts
+++ b/packages/taler-harness/src/integrationtests/test-paywall-flow.ts
@@ -17,7 +17,7 @@
 /**
  * Imports.
  */
-import { GlobalTestState, MerchantPrivateApi } from "../harness/harness.js";
+import { GlobalTestState, MerchantPrivateApi, harnessHttpLib } from "../harness/harness.js";
 import {
   PreparePayResultType,
   codecForMerchantOrderStatusUnpaid,
@@ -29,12 +29,6 @@ import {
   createSimpleTestkudosEnvironmentV2,
   withdrawViaBankV2,
 } from "../harness/helpers.js";
-import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
-
-const httpLib = createPlatformHttpLib({
-  allowHttp: true,
-  enableThrottling: false,
-});
 
 /**
  * Run test for basic, bank-integrated withdrawal.
@@ -47,13 +41,15 @@ export async function runPaywallFlowTest(t: GlobalTestState) {
 
   // Withdraw digital cash into the wallet.
 
-  await withdrawViaBankV2(t, {
+  const wres = await withdrawViaBankV2(t, {
     walletClient,
     bank,
     exchange,
     amount: "TESTKUDOS:20",
   });
 
+  await wres.withdrawalFinishedCond;
+
   /**
    * =========================================================================
    * Create an order and let the wallet pay under a session ID
@@ -86,7 +82,7 @@ export async function runPaywallFlowTest(t: GlobalTestState) {
   t.assertTrue(orderStatus.already_paid_order_id === undefined);
   let publicOrderStatusUrl = new URL(orderStatus.order_status_url);
 
-  let publicOrderStatusResp = await httpLib.fetch(publicOrderStatusUrl.href);
+  let publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl.href);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -112,7 +108,7 @@ export async function runPaywallFlowTest(t: GlobalTestState) {
   const proposalId = preparePayResp.proposalId;
 
   console.log("requesting", publicOrderStatusUrl.href);
-  publicOrderStatusResp = await httpLib.fetch(publicOrderStatusUrl.href);
+  publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl.href);
   console.log("response body", publicOrderStatusResp.json());
   if (publicOrderStatusResp.status != 402) {
     throw Error(
@@ -129,7 +125,7 @@ export async function runPaywallFlowTest(t: GlobalTestState) {
   });
 
   t.assertTrue(confirmPayRes.type === ConfirmPayResultType.Done);
-  publicOrderStatusResp = await httpLib.fetch(publicOrderStatusUrl.href);
+  publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl.href);
 
   console.log(publicOrderStatusResp.json());
 
@@ -231,7 +227,7 @@ export async function runPaywallFlowTest(t: GlobalTestState) {
   console.log("requesting public status", publicOrderStatusUrl);
 
   // Ask the order status of the claimed-but-unpaid order
-  publicOrderStatusResp = await httpLib.fetch(publicOrderStatusUrl.href);
+  publicOrderStatusResp = await harnessHttpLib.fetch(publicOrderStatusUrl.href);
 
   if (publicOrderStatusResp.status != 402) {
     throw Error(`expected status 402, but got ${publicOrderStatusResp.status}`);
diff --git a/packages/taler-harness/src/integrationtests/test-refund-auto.ts b/packages/taler-harness/src/integrationtests/test-refund-auto.ts
index 607080e68..5648835d5 100644
--- a/packages/taler-harness/src/integrationtests/test-refund-auto.ts
+++ b/packages/taler-harness/src/integrationtests/test-refund-auto.ts
@@ -36,13 +36,15 @@ export async function runRefundAutoTest(t: GlobalTestState) {
 
   // Withdraw digital cash into the wallet.
 
-  await withdrawViaBankV2(t, {
+  const wres = await withdrawViaBankV2(t, {
     walletClient,
     bank,
     exchange,
     amount: "TESTKUDOS:20",
   });
 
+  await wres.withdrawalFinishedCond;
+
   // Set up order.
   const orderResp = await MerchantPrivateApi.createOrder(merchant, "default", {
     order: {
diff --git a/packages/taler-harness/src/integrationtests/test-refund-incremental.ts b/packages/taler-harness/src/integrationtests/test-refund-incremental.ts
index 8e7e38b71..8ac0948f2 100644
--- a/packages/taler-harness/src/integrationtests/test-refund-incremental.ts
+++ b/packages/taler-harness/src/integrationtests/test-refund-incremental.ts
@@ -45,13 +45,15 @@ export async function runRefundIncrementalTest(t: GlobalTestState) {
 
   // Withdraw digital cash into the wallet.
 
-  await withdrawViaBankV2(t, {
+  const wres = await withdrawViaBankV2(t, {
     walletClient,
     bank,
     exchange,
     amount: "TESTKUDOS:20",
   });
 
+  await wres.withdrawalFinishedCond;
+
   // Set up order.
 
   const orderResp = await MerchantPrivateApi.createOrder(merchant, "default", {
diff --git a/packages/taler-harness/src/integrationtests/test-wallet-balance.ts b/packages/taler-harness/src/integrationtests/test-wallet-balance.ts
index 0f75bd96e..15b0fd427 100644
--- a/packages/taler-harness/src/integrationtests/test-wallet-balance.ts
+++ b/packages/taler-harness/src/integrationtests/test-wallet-balance.ts
@@ -17,22 +17,11 @@
 /**
  * Imports.
  */
-import { Amounts, Duration, PreparePayResultType } from "@gnu-taler/taler-util";
+import { Amounts, PreparePayResultType } from "@gnu-taler/taler-util";
 import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
-import { CoinConfig, defaultCoinConfig } from "../harness/denomStructures.js";
-import {
-  ExchangeService,
-  FakebankService,
-  getRandomIban,
-  GlobalTestState,
-  MerchantPrivateApi,
-  MerchantService,
-  setupDb,
-  WalletCli,
-} from "../harness/harness.js";
+import { GlobalTestState, MerchantPrivateApi } from "../harness/harness.js";
 import {
   createSimpleTestkudosEnvironmentV2,
-  withdrawViaBank,
   withdrawViaBankV2,
 } from "../harness/helpers.js";
 
@@ -50,13 +39,15 @@ export async function runWalletBalanceTest(t: GlobalTestState) {
 
   // Withdraw digital cash into the wallet.
 
-  await withdrawViaBankV2(t, {
+  const wres = await withdrawViaBankV2(t, {
     walletClient,
     bank,
     exchange,
     amount: "TESTKUDOS:20",
   });
 
+  await wres.withdrawalFinishedCond;
+
   const order = {
     summary: "Buy me!",
     amount: "TESTKUDOS:5",
diff --git a/packages/taler-harness/src/integrationtests/test-wallet-dbless.ts b/packages/taler-harness/src/integrationtests/test-wallet-dbless.ts
index 58f564f34..153ae93d8 100644
--- a/packages/taler-harness/src/integrationtests/test-wallet-dbless.ts
+++ b/packages/taler-harness/src/integrationtests/test-wallet-dbless.ts
@@ -23,7 +23,6 @@ import {
   j2s,
   TalerError,
 } from "@gnu-taler/taler-util";
-import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
 import {
   checkReserve,
   CryptoDispatcher,
@@ -36,7 +35,7 @@ import {
   Wallet,
   withdrawCoin,
 } from "@gnu-taler/taler-wallet-core";
-import { GlobalTestState } from "../harness/harness.js";
+import { GlobalTestState, harnessHttpLib } from "../harness/harness.js";
 import { createSimpleTestkudosEnvironmentV2 } from "../harness/helpers.js";
 
 /**
@@ -47,10 +46,7 @@ export async function runWalletDblessTest(t: GlobalTestState) {
 
   const { bank, exchange } = await createSimpleTestkudosEnvironmentV2(t);
 
-  const http = createPlatformHttpLib({
-    allowHttp: true,
-    enableThrottling: false,
-  });
+  const http = harnessHttpLib;
   const cryptiDisp = new CryptoDispatcher(
     new SynchronousCryptoWorkerFactoryPlain(),
   );