From fb3da3a28d6ed6a16ca7d0fa8ec775de51c7df6b Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Thu, 11 Mar 2021 13:08:41 +0100
Subject: towards recovering from accidental double spends

---
 .../test-wallet-backup-doublespend.ts              | 140 +++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 packages/taler-wallet-cli/src/integrationtests/test-wallet-backup-doublespend.ts

(limited to 'packages/taler-wallet-cli/src/integrationtests/test-wallet-backup-doublespend.ts')

diff --git a/packages/taler-wallet-cli/src/integrationtests/test-wallet-backup-doublespend.ts b/packages/taler-wallet-cli/src/integrationtests/test-wallet-backup-doublespend.ts
new file mode 100644
index 000000000..94cad7510
--- /dev/null
+++ b/packages/taler-wallet-cli/src/integrationtests/test-wallet-backup-doublespend.ts
@@ -0,0 +1,140 @@
+/*
+ This file is part of GNU Taler
+ (C) 2020 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * Imports.
+ */
+import { PreparePayResultType } from "@gnu-taler/taler-wallet-core";
+import { testPay } from "@gnu-taler/taler-wallet-core/src/operations/testing";
+import {
+  GlobalTestState,
+  BankApi,
+  BankAccessApi,
+  WalletCli,
+  MerchantPrivateApi,
+} from "./harness";
+import {
+  createSimpleTestkudosEnvironment,
+  makeTestPayment,
+  withdrawViaBank,
+} from "./helpers";
+import { SyncService } from "./sync";
+
+/**
+ * Run test for basic, bank-integrated withdrawal.
+ */
+export async function runWalletBackupDoublespendTest(t: GlobalTestState) {
+  // Set up test environment
+
+  const {
+    commonDb,
+    merchant,
+    wallet,
+    bank,
+    exchange,
+  } = await createSimpleTestkudosEnvironment(t);
+
+  const sync = await SyncService.create(t, {
+    currency: "TESTKUDOS",
+    annualFee: "TESTKUDOS:0.5",
+    database: commonDb.connStr,
+    fulfillmentUrl: "taler://fulfillment-success",
+    httpPort: 8089,
+    name: "sync1",
+    paymentBackendUrl: merchant.makeInstanceBaseUrl(),
+    uploadLimitMb: 10,
+  });
+
+  await sync.start();
+  await sync.pingUntilAvailable();
+
+  await wallet.addBackupProvider({
+    backupProviderBaseUrl: sync.baseUrl,
+    activate: true,
+  });
+
+  await withdrawViaBank(t, { wallet, bank, exchange, amount: "TESTKUDOS:10" });
+
+  await wallet.runBackupCycle();
+  await wallet.runUntilDone();
+  await wallet.runBackupCycle();
+
+  const backupRecovery = await wallet.exportBackupRecovery();
+
+  const wallet2 = new WalletCli(t, "wallet2");
+
+  await wallet2.importBackupRecovery({ recovery: backupRecovery });
+
+  await wallet2.runBackupCycle();
+
+  console.log("wallet1 balance before spend:", await wallet.getBalances());
+
+  await makeTestPayment(t, {
+    merchant,
+    wallet,
+    order: {
+      summary: "foo",
+      amount: "TESTKUDOS:7",
+    },
+  });
+
+  await wallet.runUntilDone();
+
+  console.log("wallet1 balance after spend:", await wallet.getBalances());
+
+  {
+    console.log("wallet2 balance:", await wallet2.getBalances());
+  }
+
+  // Now we double-spend with the second wallet
+
+  {
+    const instance = "default";
+
+    const orderResp = await MerchantPrivateApi.createOrder(merchant, instance, {
+      order: {
+        amount: "TESTKUDOS:8",
+        summary: "bla",
+        fulfillment_url: "taler://fulfillment-success",
+      },
+    });
+
+    let orderStatus = await MerchantPrivateApi.queryPrivateOrderStatus(
+      merchant,
+      {
+        orderId: orderResp.order_id,
+      },
+    );
+
+    t.assertTrue(orderStatus.order_status === "unpaid");
+
+    // Make wallet pay for the order
+
+    const preparePayResult = await wallet2.preparePay({
+      talerPayUri: orderStatus.taler_pay_uri,
+    });
+
+    t.assertTrue(
+      preparePayResult.status === PreparePayResultType.PaymentPossible,
+    );
+
+    const res = await wallet2.confirmPay({
+      proposalId: preparePayResult.proposalId,
+    });
+
+    console.log(res);
+  }
+}
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