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+/*
+ This file is part of TALER
+ Copyright (C) 2023 Taler Systems SA
+
+ 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.
+
+ 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 TALER; see the file COPYING. If not, see
+ <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file testing/test_exchange_api_conflicts.c
+ * @brief testcase to test exchange's handling of coin conflicts: same private
+ * keys but different denominations or age restrictions
+ * @author Özgür Kesim
+ */
+#include "platform.h"
+#include "taler_util.h"
+#include "taler_signatures.h"
+#include "taler_exchange_service.h"
+#include "taler_json_lib.h"
+#include <gnunet/gnunet_util_lib.h>
+#include <gnunet/gnunet_testing_lib.h>
+#include <microhttpd.h>
+#include "taler_bank_service.h"
+#include "taler_fakebank_lib.h"
+#include "taler_testing_lib.h"
+#include "taler_extensions.h"
+
+/**
+ * Configuration file we use. One (big) configuration is used
+ * for the various components for this test.
+ */
+static char *config_file;
+
+/**
+ * Our credentials.
+ */
+static struct TALER_TESTING_Credentials cred;
+
+/**
+ * Some tests behave differently when using CS as we cannot
+ * reuse the coin private key for different denominations
+ * due to the derivation of it with the /csr values. Hence
+ * some tests behave differently in CS mode, hence this
+ * flag.
+ */
+static bool uses_cs;
+
+/**
+ * Execute the taler-exchange-wirewatch command with
+ * our configuration file.
+ *
+ * @param label label to use for the command.
+ */
+#define CMD_EXEC_WIREWATCH(label) \
+ TALER_TESTING_cmd_exec_wirewatch2 (label, config_file, \
+ "exchange-account-2")
+
+/**
+ * Execute the taler-exchange-aggregator, closer and transfer commands with
+ * our configuration file.
+ *
+ * @param label label to use for the command.
+ */
+#define CMD_EXEC_AGGREGATOR(label) \
+ TALER_TESTING_cmd_sleep ("sleep-before-aggregator", 2), \
+ TALER_TESTING_cmd_exec_aggregator (label "-aggregator", config_file), \
+ TALER_TESTING_cmd_exec_transfer (label "-transfer", config_file)
+
+
+/**
+ * Run wire transfer of funds from some user's account to the
+ * exchange.
+ *
+ * @param label label to use for the command.
+ * @param amount amount to transfer, i.e. "EUR:1"
+ */
+#define CMD_TRANSFER_TO_EXCHANGE(label,amount) \
+ TALER_TESTING_cmd_admin_add_incoming (label, amount, \
+ &cred.ba, \
+ cred.user42_payto)
+
+/**
+ * Main function that will tell the interpreter what commands to
+ * run.
+ *
+ * @param cls closure
+ * @param is interpreter we use to run commands
+ */
+static void
+run (void *cls,
+ struct TALER_TESTING_Interpreter *is)
+{
+ (void) cls;
+ /**
+ * Test withdrawal with conflicting coins.
+ */
+ struct TALER_TESTING_Command withdraw_conflict_denom[] = {
+ /**
+ * Move money to the exchange's bank account.
+ */
+ CMD_TRANSFER_TO_EXCHANGE ("create-reserve-denom",
+ "EUR:21.14"),
+ TALER_TESTING_cmd_check_bank_admin_transfer ("check-create-reserve-denom",
+ "EUR:21.14",
+ cred.user42_payto,
+ cred.exchange_payto,
+ "create-reserve-denom"),
+ /**
+ * Make a reserve exist, according to the previous
+ * transfer.
+ */
+ CMD_EXEC_WIREWATCH ("wirewatch-conflict-denom"),
+ /**
+ * Withdraw EUR:0.10, EUR:1, EUR:5, EUR:15, but using the same private key each time.
+ */
+ TALER_TESTING_cmd_batch_withdraw_with_conflict ("withdraw-coin-denom-1",
+ "create-reserve-denom",
+ true,
+ 0, /* age */
+ MHD_HTTP_OK,
+ "EUR:1",
+ "EUR:5",
+ "EUR:10",
+ "EUR:0.10",
+ NULL),
+
+ TALER_TESTING_cmd_end ()
+ };
+
+ struct TALER_TESTING_Command spend_conflict_denom[] = {
+ /**
+ * Spend the coin.
+ */
+ TALER_TESTING_cmd_deposit ("deposit-denom",
+ "withdraw-coin-denom-1",
+ 0,
+ cred.user42_payto,
+ "{\"items\":[{\"name\":\"ice cream\",\"value\":1}]}",
+ GNUNET_TIME_UNIT_ZERO,
+ "EUR:0.99",
+ MHD_HTTP_OK),
+ TALER_TESTING_cmd_deposit ("deposit-denom-conflict",
+ "withdraw-coin-denom-1",
+ 1,
+ cred.user42_payto,
+ "{\"items\":[{\"name\":\"ice cream\",\"value\":1}]}",
+ GNUNET_TIME_UNIT_ZERO,
+ "EUR:4.99",
+ /* Note: For CS, even though the master secret is the
+ * same for each coin, their private keys differ due
+ * to the random choice of the nonce by the exchange. */
+ uses_cs ? MHD_HTTP_OK : MHD_HTTP_CONFLICT),
+ TALER_TESTING_cmd_deposit ("deposit-denom-conflict-2",
+ "withdraw-coin-denom-1",
+ 2,
+ cred.user42_payto,
+ "{\"items\":[{\"name\":\"ice cream\",\"value\":1}]}",
+ GNUNET_TIME_UNIT_ZERO,
+ "EUR:9.99",
+ /* Note: For CS, even though the master secret is the
+ * same for each coin, their private keys differ due
+ * to the random choice of the nonce by the exchange. */
+ uses_cs ? MHD_HTTP_OK : MHD_HTTP_CONFLICT),
+ TALER_TESTING_cmd_deposit ("deposit-denom-conflict-3",
+ "withdraw-coin-denom-1",
+ 3,
+ cred.user42_payto,
+ "{\"items\":[{\"name\":\"ice cream\",\"value\":1}]}",
+ GNUNET_TIME_UNIT_ZERO,
+ "EUR:0.09",
+ /* Note: For CS, even though the master secret is the
+ * same for each coin, their private keys differ due
+ * to the random choice of the nonce by the exchange. */
+ uses_cs ? MHD_HTTP_OK : MHD_HTTP_CONFLICT),
+ TALER_TESTING_cmd_end ()
+ };
+
+ struct TALER_TESTING_Command withdraw_conflict_age[] = {
+ /**
+ * Move money to the exchange's bank account.
+ */
+ CMD_TRANSFER_TO_EXCHANGE ("create-reserve-age",
+ "EUR:3.03"),
+ TALER_TESTING_cmd_check_bank_admin_transfer ("check-create-reserve-age",
+ "EUR:3.03",
+ cred.user42_payto,
+ cred.exchange_payto,
+ "create-reserve-age"),
+ /**
+ * Make a reserve exist, according to the previous
+ * transfer.
+ */
+ CMD_EXEC_WIREWATCH ("wirewatch-conflict-age"),
+ /**
+ * Withdraw EUR:1, EUR:5, EUR:15, but using the same private key each time.
+ */
+ TALER_TESTING_cmd_batch_withdraw_with_conflict ("withdraw-coin-age-1",
+ "create-reserve-age",
+ true,
+ 10, /* age */
+ MHD_HTTP_OK,
+ "EUR:1",
+ "EUR:1",
+ "EUR:1",
+ NULL),
+
+ TALER_TESTING_cmd_end ()
+ };
+
+ struct TALER_TESTING_Command spend_conflict_age[] = {
+ /**
+ * Spend the coin.
+ */
+ TALER_TESTING_cmd_deposit ("deposit-age",
+ "withdraw-coin-age-1",
+ 0,
+ cred.user42_payto,
+ "{\"items\":[{\"name\":\"ice cream\",\"value\":1}]}",
+ GNUNET_TIME_UNIT_ZERO,
+ "EUR:0.99",
+ MHD_HTTP_OK),
+ TALER_TESTING_cmd_deposit ("deposit-age-conflict",
+ "withdraw-coin-age-1",
+ 1,
+ cred.user42_payto,
+ "{\"items\":[{\"name\":\"ice cream\",\"value\":1}]}",
+ GNUNET_TIME_UNIT_ZERO,
+ "EUR:0.99",
+ MHD_HTTP_CONFLICT),
+ TALER_TESTING_cmd_deposit ("deposit-age-conflict-2",
+ "withdraw-coin-age-1",
+ 2,
+ cred.user42_payto,
+ "{\"items\":[{\"name\":\"ice cream\",\"value\":1}]}",
+ GNUNET_TIME_UNIT_ZERO,
+ "EUR:0.99",
+ MHD_HTTP_CONFLICT),
+ TALER_TESTING_cmd_end ()
+ };
+
+
+ {
+ struct TALER_TESTING_Command commands[] = {
+ TALER_TESTING_cmd_run_fakebank ("run-fakebank",
+ cred.cfg,
+ "exchange-account-2"),
+ TALER_TESTING_cmd_system_start ("start-taler",
+ config_file,
+ "-e",
+ NULL),
+ TALER_TESTING_cmd_get_exchange ("get-exchange",
+ cred.cfg,
+ NULL,
+ true,
+ true),
+ TALER_TESTING_cmd_batch ("withdraw-conflict-denom",
+ withdraw_conflict_denom),
+ TALER_TESTING_cmd_batch ("spend-conflict-denom",
+ spend_conflict_denom),
+ TALER_TESTING_cmd_batch ("withdraw-conflict-age",
+ withdraw_conflict_age),
+ TALER_TESTING_cmd_batch ("spend-conflict-age",
+ spend_conflict_age),
+ /* End the suite. */
+ TALER_TESTING_cmd_end ()
+ };
+
+ TALER_TESTING_run (is,
+ commands);
+ }
+}
+
+
+int
+main (int argc,
+ char *const *argv)
+{
+ (void) argc;
+ {
+ char *cipher;
+
+ cipher = GNUNET_STRINGS_get_suffix_from_binary_name (argv[0]);
+ GNUNET_assert (NULL != cipher);
+ uses_cs = (0 == strcmp (cipher,
+ "cs"));
+ GNUNET_asprintf (&config_file,
+ "test_exchange_api_conflicts-%s.conf",
+ cipher);
+ GNUNET_free (cipher);
+ }
+ return TALER_TESTING_main (argv,
+ "INFO",
+ config_file,
+ "exchange-account-2",
+ TALER_TESTING_BS_FAKEBANK,
+ &cred,
+ &run,
+ NULL);
+}
+
+
+/* end of test_exchange_api_conflicts.c */
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