restructure tests and build system

5 files changed, 2487 insertions, 82 deletions

diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am
index 231e049a0..8ffee92bf 100644
--- a/src/lib/Makefile.am
+++ b/src/lib/Makefile.am
@@ -6,6 +6,8 @@ if USE_COVERAGE
   XLIB = -lgcov
 endif
 
+# Libraries
+
 lib_LTLIBRARIES = \
   libtalerauditor.la \
   libtalerexchange.la \
@@ -37,7 +39,13 @@ libtalerexchange_la_LIBADD = \
   -lgnunetutil \
   -ljansson \
   $(XLIB)
-
+if HAVE_LIBCURL
+libtalerexchange_la_LIBADD += -lcurl
+else
+if HAVE_LIBGNURL
+libtalerexchange_la_LIBADD += -lgnurl
+endif
+endif
 
 libtalerauditor_la_LDFLAGS = \
   -version-info 0:0:0 \
@@ -56,7 +64,6 @@ libtalerauditor_la_LIBADD = \
   -lgnunetutil \
   -ljansson \
   $(XLIB)
-
 if HAVE_LIBCURL
 libtalerauditor_la_LIBADD += -lcurl
 else
@@ -65,7 +72,6 @@ libtalerauditor_la_LIBADD += -lgnurl
 endif
 endif
 
-
 libtalertesting_la_LDFLAGS = \
   -version-info 0:0:0 \
   -no-undefined
@@ -135,96 +141,70 @@ libtalertesting_la_LIBADD = \
   -ljansson \
   $(XLIB)
 
-if HAVE_LIBCURL
-libtalerexchange_la_LIBADD += -lcurl
-else
-if HAVE_LIBGNURL
-libtalerexchange_la_LIBADD += -lgnurl
-endif
-endif
+# Testcases
+
+AM_TESTS_ENVIRONMENT=export TALER_PREFIX=$${TALER_PREFIX:-@libdir@};export PATH=$${TALER_PREFIX:-@prefix@}/bin:$$PATH;
 
 check_PROGRAMS = \
-  test_auditor_api_version \
   test_auditor_api \
+  test_auditor_api_version \
   test_bank_api_with_fakebank \
   test_bank_api_with_pybank \
   test_exchange_api \
   test_exchange_api_keys_cherry_picking \
-  test_exchange_api_overlapping_keys_bug
-
+  test_exchange_api_overlapping_keys_bug \
+  test_taler_exchange_aggregator-postgres \
+  test_taler_exchange_wirewatch-postgres
 if HAVE_TWISTER
   check_PROGRAMS += \
     test_exchange_api_twisted \
-    test_bank_api_with_pybank_twisted \
-    test_bank_api_with_fakebank_twisted
+    test_bank_api_with_fakebank_twisted \
+    test_bank_api_with_pybank_twisted
 endif
 
-test_bank_api_with_pybank_SOURCES = \
-  test_bank_api.c
-test_bank_api_with_pybank_LDADD = \
-  libtalertesting.la \
-  libtalerexchange.la \
-  -lgnunetutil \
-  $(top_builddir)/src/bank-lib/libtalerbank.la
-
-test_bank_api_with_fakebank_SOURCES = \
-  test_bank_api.c
-test_bank_api_with_fakebank_LDADD = \
-  $(top_builddir)/src/lib/libtalertesting.la \
-  -ltalerexchange \
-  -lgnunetutil \
-  libtalerbank.la
+TESTS = \
+  $(check_PROGRAMS)
 
-test_exchange_api_twisted_SOURCES = \
-  test_exchange_api_twisted.c
-test_exchange_api_twisted_LDADD = \
-  $(LIBGCRYPT_LIBS) \
+test_auditor_api_SOURCES = \
+  test_auditor_api.c
+test_auditor_api_LDADD = \
+  libtalerauditor.la \
   libtalertesting.la \
   libtalerexchange.la \
+  $(LIBGCRYPT_LIBS) \
   $(top_builddir)/src/bank-lib/libtalerfakebank.la \
   $(top_builddir)/src/bank-lib/libtalerbank.la \
   $(top_builddir)/src/json/libtalerjson.la \
   $(top_builddir)/src/util/libtalerutil.la \
-  -ltalertwistertesting \
-  -lgnunetjson \
   -lgnunetcurl \
   -lgnunetutil \
   -ljansson
 
-test_bank_api_with_fakebank_twisted_SOURCES = \
-  test_bank_api_twisted.c
-test_bank_api_with_fakebank_twisted_LDADD = \
-  $(top_builddir)/src/lib/libtalertesting.la \
-  $(top_builddir)/src/bank-lib/libtalerbank.la \
-  $(top_builddir)/src/bank-lib/libtalerfakebank.la \
-  $(top_builddir)/src/lib/libtalerexchange.la \
-  $(top_builddir)/src/json/libtalerjson.la \
-  -ltalertwistertesting \
-  -lgnunetjson \
+test_auditor_api_version_SOURCES = \
+  test_auditor_api_version.c
+test_auditor_api_version_LDADD = \
+  libtalerauditor.la \
+  $(LIBGCRYPT_LIBS) \
+  $(top_builddir)/src/util/libtalerutil.la \
   -lgnunetcurl \
   -lgnunetutil \
   -ljansson
 
-test_bank_api_with_pybank_twisted_SOURCES = \
-  test_bank_api_twisted.c
-test_bank_api_with_pybank_twisted_LDADD = \
+test_bank_api_with_fakebank_SOURCES = \
+  test_bank_api.c
+test_bank_api_with_fakebank_LDADD = \
   $(top_builddir)/src/lib/libtalertesting.la \
-  $(top_builddir)/src/bank-lib/libtalerbank.la \
-  $(top_builddir)/src/bank-lib/libtalerfakebank.la \
-  $(top_builddir)/src/lib/libtalerexchange.la \
-  $(top_builddir)/src/json/libtalerjson.la \
-  -ltalertwistertesting \
-  -lgnunetjson \
-  -lgnunetcurl \
+  -ltalerexchange \
   -lgnunetutil \
-  -ljansson
-
-
-
-AM_TESTS_ENVIRONMENT=export TALER_PREFIX=$${TALER_PREFIX:-@libdir@};export PATH=$${TALER_PREFIX:-@prefix@}/bin:$$PATH;
+  libtalerbank.la
 
-TESTS = \
-  $(check_PROGRAMS)
+test_bank_api_with_pybank_SOURCES = \
+  test_bank_api.c
+test_bank_api_with_pybank_LDADD = \
+  libtalertesting.la \
+  libtalerexchange.la \
+  -lgnunetutil \
+  $(top_builddir)/src/bank-lib/libtalerbank.la
 
 test_exchange_api_SOURCES = \
   test_exchange_api.c
@@ -240,9 +220,9 @@ test_exchange_api_LDADD = \
   -lgnunetutil \
   -ljansson
 
-test_exchange_api_overlapping_keys_bug_SOURCES = \
-  test_exchange_api_overlapping_keys_bug.c
-test_exchange_api_overlapping_keys_bug_LDADD = \
+test_exchange_api_keys_cherry_picking_SOURCES = \
+  test_exchange_api_keys_cherry_picking.c
+test_exchange_api_keys_cherry_picking_LDADD = \
   libtalertesting.la \
   libtalerexchange.la \
   $(LIBGCRYPT_LIBS) \
@@ -253,9 +233,9 @@ test_exchange_api_overlapping_keys_bug_LDADD = \
   -lgnunetutil \
   -ljansson
 
-test_exchange_api_keys_cherry_picking_SOURCES = \
-  test_exchange_api_keys_cherry_picking.c
-test_exchange_api_keys_cherry_picking_LDADD = \
+test_exchange_api_overlapping_keys_bug_SOURCES = \
+  test_exchange_api_overlapping_keys_bug.c
+test_exchange_api_overlapping_keys_bug_LDADD = \
   libtalertesting.la \
   libtalerexchange.la \
   $(LIBGCRYPT_LIBS) \
@@ -266,37 +246,87 @@ test_exchange_api_keys_cherry_picking_LDADD = \
   -lgnunetutil \
   -ljansson
 
-test_auditor_api_SOURCES = \
-  test_auditor_api.c
-test_auditor_api_LDADD = \
-  libtalerauditor.la \
+test_taler_exchange_aggregator_postgres_SOURCES = \
+  test_taler_exchange_aggregator.c
+test_taler_exchange_aggregator_postgres_LDADD = \
+  $(LIBGCRYPT_LIBS) \
+  $(top_builddir)/src/exchangedb/libtalerexchangedb.la \
+  $(top_builddir)/src/bank-lib/libtalerfakebank.la \
+  $(top_builddir)/src/json/libtalerjson.la \
+  $(top_builddir)/src/util/libtalerutil.la \
+  -lmicrohttpd \
+  -lgnunetutil \
+  -lgnunetjson \
+  -ljansson \
+  -lpthread
+
+test_taler_exchange_wirewatch_postgres_SOURCES = \
+  test_taler_exchange_wirewatch.c
+test_taler_exchange_wirewatch_postgres_LDADD = \
+  $(LIBGCRYPT_LIBS) \
+  $(top_builddir)/src/exchangedb/libtalerexchangedb.la \
+  $(top_builddir)/src/bank-lib/libtalerfakebank.la \
+  $(top_builddir)/src/json/libtalerjson.la \
+  $(top_builddir)/src/util/libtalerutil.la \
+  -lmicrohttpd \
+  -lgnunetutil \
+  -lgnunetjson \
+  -lgnunetpq \
+  -ljansson \
+  -lpthread
+
+test_exchange_api_twisted_SOURCES = \
+  test_exchange_api_twisted.c
+test_exchange_api_twisted_LDADD = \
+  $(LIBGCRYPT_LIBS) \
   libtalertesting.la \
   libtalerexchange.la \
-  $(LIBGCRYPT_LIBS) \
   $(top_builddir)/src/bank-lib/libtalerfakebank.la \
   $(top_builddir)/src/bank-lib/libtalerbank.la \
   $(top_builddir)/src/json/libtalerjson.la \
   $(top_builddir)/src/util/libtalerutil.la \
+  -ltalertwistertesting \
+  -lgnunetjson \
   -lgnunetcurl \
   -lgnunetutil \
   -ljansson
 
+test_bank_api_with_fakebank_twisted_SOURCES = \
+  test_bank_api_twisted.c
+test_bank_api_with_fakebank_twisted_LDADD = \
+  $(top_builddir)/src/lib/libtalertesting.la \
+  $(top_builddir)/src/bank-lib/libtalerbank.la \
+  $(top_builddir)/src/bank-lib/libtalerfakebank.la \
+  $(top_builddir)/src/lib/libtalerexchange.la \
+  $(top_builddir)/src/json/libtalerjson.la \
+  -ltalertwistertesting \
+  -lgnunetjson \
+  -lgnunetcurl \
+  -lgnunetutil \
+  -ljansson
 
-test_auditor_api_version_SOURCES = \
-  test_auditor_api_version.c
-test_auditor_api_version_LDADD = \
-  libtalerauditor.la \
-  $(LIBGCRYPT_LIBS) \
-  $(top_builddir)/src/util/libtalerutil.la \
+test_bank_api_with_pybank_twisted_SOURCES = \
+  test_bank_api_twisted.c
+test_bank_api_with_pybank_twisted_LDADD = \
+  $(top_builddir)/src/lib/libtalertesting.la \
+  $(top_builddir)/src/bank-lib/libtalerbank.la \
+  $(top_builddir)/src/bank-lib/libtalerfakebank.la \
+  $(top_builddir)/src/lib/libtalerexchange.la \
+  $(top_builddir)/src/json/libtalerjson.la \
+  -ltalertwistertesting \
+  -lgnunetjson \
   -lgnunetcurl \
   -lgnunetutil \
   -ljansson
 
 
+# Distribution
 
 EXTRA_DIST = \
   bank.conf \
   bank_twisted.conf \
+  test_auditor_api.conf \
+  test_auditor_api_expire_reserve_now.conf \
   test_exchange_api_home/.local/share/taler/exchange/offline-keys/master.priv \
   test_exchange_api_home/.config/taler/account-2.json \
   test_exchange_api_keys_cherry_picking_home/.config/taler/x-taler-bank.json \
@@ -310,5 +340,5 @@ EXTRA_DIST = \
   test_exchange_api_keys_cherry_picking_extended.conf \
   test_exchange_api_keys_cherry_picking_extended_2.conf \
   test_exchange_api_expire_reserve_now.conf \
-  test_auditor_api.conf \
-  test_auditor_api_expire_reserve_now.conf
+  test-taler-exchange-aggregator-postgres.conf \
+  test-taler-exchange-wirewatch-postgres.conf
diff --git a/src/lib/test-taler-exchange-aggregator-postgres.conf b/src/lib/test-taler-exchange-aggregator-postgres.conf
new file mode 100644
index 000000000..b6c18fd5b
--- /dev/null
+++ b/src/lib/test-taler-exchange-aggregator-postgres.conf
@@ -0,0 +1,87 @@
+[PATHS]
+# Persistant data storage for the testcase
+TALER_TEST_HOME = test_taler_exchange_httpd_home/
+
+[taler]
+# Currency supported by the exchange (can only be one)
+CURRENCY = EUR
+
+[exchange]
+# The DB plugin to use
+DB = postgres
+
+# HTTP port the exchange listens to
+PORT = 8081
+
+# Master public key used to sign the exchange's various keys
+MASTER_PUBLIC_KEY = 98NJW3CQHZQGQXTY3K85K531XKPAPAVV4Q5V8PYYRR00NJGZWNVG
+
+# Expected base URL of the exchange.  Used in wire transfers for
+# the tracking API.
+BASE_URL = "https://exchange.taler.net/"
+
+[exchangedb]
+# After how long do we close idle reserves?  The exchange
+# and the auditor must agree on this value.  We currently
+# expect it to be globally defined for the whole system,
+# as there is no way for wallets to query this value.  Thus,
+# it is only configurable for testing, and should be treated
+# as constant in production.
+IDLE_RESERVE_EXPIRATION_TIME = 4 weeks
+
+[exchangedb-postgres]
+
+#The connection string the plugin has to use for connecting to the database
+CONFIG = postgres:///talercheck
+
+
+[exchangedb]
+
+# After how long do we close idle reserves?  The exchange
+# and the auditor must agree on this value.  We currently
+# expect it to be globally defined for the whole system,
+# as there is no way for wallets to query this value.  Thus,
+# it is only configurable for testing, and should be treated
+# as constant in production.
+IDLE_RESERVE_EXPIRATION_TIME = 4 weeks
+
+# After how long do we forget about reserves?  Should be above
+# the legal expiration timeframe of withdrawn coins.
+LEGAL_RESERVE_EXPIRATION_TIME = 7 years
+
+[account-1]
+
+# What is the account URL?
+URL = "payto://x-taler-bank/localhost:8082/3"
+
+WIRE_RESPONSE = ${TALER_CONFIG_HOME}/account-1.json
+PLUGIN = "taler_bank"
+ENABLE_DEBIT = YES
+ENABLE_CREDIT = YES
+TALER_BANK_AUTH_METHOD = NONE
+
+[fees-x-taler-bank]
+
+# Fees for the forseeable future...
+# If you see this after 2018, update to match the next 10 years...
+WIRE-FEE-2018 = EUR:0.01
+WIRE-FEE-2019 = EUR:0.01
+WIRE-FEE-2020 = EUR:0.01
+WIRE-FEE-2021 = EUR:0.01
+WIRE-FEE-2022 = EUR:0.01
+WIRE-FEE-2023 = EUR:0.01
+WIRE-FEE-2024 = EUR:0.01
+WIRE-FEE-2025 = EUR:0.01
+WIRE-FEE-2026 = EUR:0.01
+WIRE-FEE-2027 = EUR:0.01
+
+CLOSING-FEE-2018 = EUR:0.01
+CLOSING-FEE-2019 = EUR:0.01
+CLOSING-FEE-2020 = EUR:0.01
+CLOSING-FEE-2021 = EUR:0.01
+CLOSING-FEE-2022 = EUR:0.01
+CLOSING-FEE-2023 = EUR:0.01
+CLOSING-FEE-2024 = EUR:0.01
+CLOSING-FEE-2025 = EUR:0.01
+CLOSING-FEE-2026 = EUR:0.01
+CLOSING-FEE-2027 = EUR:0.01
diff --git a/src/lib/test-taler-exchange-wirewatch-postgres.conf b/src/lib/test-taler-exchange-wirewatch-postgres.conf
new file mode 100644
index 000000000..7f8cc4793
--- /dev/null
+++ b/src/lib/test-taler-exchange-wirewatch-postgres.conf
@@ -0,0 +1,73 @@
+[PATHS]
+# Persistant data storage for the testcase
+TALER_TEST_HOME = test_taler_exchange_httpd_home/
+
+[taler]
+# Currency supported by the exchange (can only be one)
+CURRENCY = EUR
+
+[exchange]
+# The DB plugin to use
+DB = postgres
+
+# HTTP port the exchange listens to
+PORT = 8081
+
+# Master public key used to sign the exchange's various keys
+MASTER_PUBLIC_KEY = 98NJW3CQHZQGQXTY3K85K531XKPAPAVV4Q5V8PYYRR00NJGZWNVG
+
+# Expected base URL of the exchange.
+BASE_URL = "https://exchange.taler.net/"
+
+[exchangedb]
+# After how long do we close idle reserves?  The exchange
+# and the auditor must agree on this value.  We currently
+# expect it to be globally defined for the whole system,
+# as there is no way for wallets to query this value.  Thus,
+# it is only configurable for testing, and should be treated
+# as constant in production.
+#
+# This is THE test that requires a short reserve expiration time!
+IDLE_RESERVE_EXPIRATION_TIME = 5 s
+
+[exchangedb-postgres]
+
+#The connection string the plugin has to use for connecting to the database
+CONFIG = postgres:///talercheck
+
+[account-1]
+
+# What is the account URL?
+URL = "payto://x-taler-bank/localhost:8082/3"
+
+WIRE_RESPONSE = ${TALER_CONFIG_HOME}/account-1.json
+PLUGIN = "taler_bank"
+ENABLE_DEBIT = YES
+ENABLE_CREDIT = YES
+TALER_BANK_AUTH_METHOD = NONE
+
+[fees-x-taler-bank]
+
+# Fees for the forseeable future...
+# If you see this after 2018, update to match the next 10 years...
+WIRE-FEE-2018 = EUR:0.01
+WIRE-FEE-2019 = EUR:0.01
+WIRE-FEE-2020 = EUR:0.01
+WIRE-FEE-2021 = EUR:0.01
+WIRE-FEE-2022 = EUR:0.01
+WIRE-FEE-2023 = EUR:0.01
+WIRE-FEE-2024 = EUR:0.01
+WIRE-FEE-2025 = EUR:0.01
+WIRE-FEE-2026 = EUR:0.01
+WIRE-FEE-2027 = EUR:0.01
+
+CLOSING-FEE-2018 = EUR:0.01
+CLOSING-FEE-2019 = EUR:0.01
+CLOSING-FEE-2020 = EUR:0.01
+CLOSING-FEE-2021 = EUR:0.01
+CLOSING-FEE-2022 = EUR:0.01
+CLOSING-FEE-2023 = EUR:0.01
+CLOSING-FEE-2024 = EUR:0.01
+CLOSING-FEE-2025 = EUR:0.01
+CLOSING-FEE-2026 = EUR:0.01
+CLOSING-FEE-2027 = EUR:0.01
diff --git a/src/lib/test_taler_exchange_aggregator.c b/src/lib/test_taler_exchange_aggregator.c
new file mode 100644
index 000000000..a5f03e1d9
--- /dev/null
+++ b/src/lib/test_taler_exchange_aggregator.c
@@ -0,0 +1,1339 @@
+/*
+  This file is part of TALER
+  (C) 2016-2020 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 exchange/test_taler_exchange_aggregator.c
+ * @brief Tests for taler-exchange-aggregator logic
+ * @author Christian Grothoff <christian@grothoff.org>
+ */
+#include "platform.h"
+#include "taler_util.h"
+#include <gnunet/gnunet_json_lib.h>
+#include "taler_json_lib.h"
+#include "taler_exchangedb_plugin.h"
+#include <microhttpd.h>
+#include "taler_fakebank_lib.h"
+
+
+/**
+ * Commands for the interpreter.
+ */
+enum OpCode
+{
+
+  /**
+   * Terminate testcase with 'skipped' result.
+   */
+  OPCODE_TERMINATE_SKIP,
+
+  /**
+   * Run taler-exchange-aggregator.
+   */
+  OPCODE_RUN_AGGREGATOR,
+
+  /**
+   * Expect that we have exhaustively gone over all transactions.
+   */
+  OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+
+  /**
+   * Execute deposit operation against database.
+   */
+  OPCODE_DATABASE_DEPOSIT,
+
+  /**
+   * Wait a certain amount of time.
+   */
+  OPCODE_WAIT,
+
+  /**
+   * Expect that we have received the specified transaction.
+   */
+  OPCODE_EXPECT_TRANSACTION,
+
+  /**
+   * Finish testcase with success.
+   */
+  OPCODE_TERMINATE_SUCCESS
+};
+
+/**
+ * Command state for the interpreter.
+ */
+struct Command
+{
+
+  /**
+   * What instruction should we run?
+   */
+  enum OpCode opcode;
+
+  /**
+   * Human-readable label for the command.
+   */
+  const char *label;
+
+  union
+  {
+
+    /**
+     * If @e opcode is #OPCODE_EXPECT_TRANSACTION, this
+     * specifies which transaction we expected.  Note that
+     * the WTID will be set, not checked!
+     */
+    struct
+    {
+
+      /**
+       * Amount to be transferred.
+       */
+      const char *amount;
+
+      /**
+       * Account to debit.
+       */
+      uint64_t debit_account;
+
+      /**
+       * Account to credit.
+       */
+      uint64_t credit_account;
+
+      /**
+       * Base URL of the exchange.
+       */
+      const char *exchange_base_url;
+
+      /**
+       * Subject of the transfer, set by the command.
+       */
+      struct TALER_WireTransferIdentifierRawP wtid;
+
+    } expect_transaction;
+
+    /**
+     * If @e opcode is #OPCODE_DATABASE_DEPOST, this
+     * specifies which deposit operation we should fake.
+     */
+    struct
+    {
+
+      /**
+       * Each merchant name is automatically mapped to a unique
+       * merchant public key.
+       */
+      const char *merchant_name;
+
+      /**
+       * Merchant account number, is mapped to wire details.
+       */
+      uint64_t merchant_account;
+
+      /**
+       * By when does the merchant request the funds to be wired.
+       */
+      struct GNUNET_TIME_Relative wire_deadline;
+
+      /**
+       * What is the total amount (including exchange fees).
+       */
+      const char *amount_with_fee;
+
+      /**
+       * How high are the exchange fees? Must be smaller than @e amount_with_fee.
+       */
+      const char *deposit_fee;
+
+    } deposit;
+
+    /**
+     * How long should we wait if the opcode is #OPCODE_WAIT.
+     */
+    struct GNUNET_TIME_Relative wait_delay;
+
+  } details;
+
+};
+
+
+/**
+ * State of the interpreter.
+ */
+struct State
+{
+  /**
+   * Array of commands to run.
+   */
+  struct Command*commands;
+
+  /**
+   * Offset of the next command to be run.
+   */
+  unsigned int ioff;
+};
+
+
+/**
+ * Pipe used to communicate child death via signal.
+ */
+static struct GNUNET_DISK_PipeHandle *sigpipe;
+
+/**
+ * ID of task called whenever we get a SIGCHILD.
+ */
+static struct GNUNET_SCHEDULER_Task *child_death_task;
+
+/**
+ * ID of task called whenever we time out.
+ */
+static struct GNUNET_SCHEDULER_Task *timeout_task;
+
+/**
+ * Return value from main().
+ */
+static int result;
+
+/**
+ * Name of the configuration file to use.
+ */
+static char *config_filename;
+
+/**
+ * Database plugin.
+ */
+static struct TALER_EXCHANGEDB_Plugin *plugin;
+
+/**
+ * Our session with the database.
+ */
+static struct TALER_EXCHANGEDB_Session *session;
+
+/**
+ * The handle for the aggregator process that we are testing.
+ */
+static struct GNUNET_OS_Process *aggregator_proc;
+
+/**
+ * State of our interpreter while we are running the aggregator
+ * process.
+ */
+static struct State *aggregator_state;
+
+/**
+ * Task running the interpreter().
+ */
+static struct GNUNET_SCHEDULER_Task *int_task;
+
+/**
+ * Private key we use for fake coins.
+ */
+static struct GNUNET_CRYPTO_RsaPrivateKey *coin_pk;
+
+/**
+ * Public key we use for fake coins.
+ */
+static struct GNUNET_CRYPTO_RsaPublicKey *coin_pub;
+
+/**
+ * Handle for our fake bank.
+ */
+static struct TALER_FAKEBANK_Handle *fb;
+
+
+/**
+ * Interprets the commands from the test program.
+ *
+ * @param cls the `struct State` of the interpreter
+ */
+static void
+interpreter (void *cls);
+
+
+/**
+ * Task triggered whenever we are to shutdown.
+ *
+ * @param cls closure, NULL if we need to self-restart
+ */
+static void
+timeout_action (void *cls)
+{
+  timeout_task = NULL;
+  GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+              "Test failed: timeout\n");
+  result = 2;
+  GNUNET_SCHEDULER_shutdown ();
+}
+
+
+/**
+ * Task triggered whenever we are to shutdown.
+ *
+ * @param cls closure, NULL if we need to self-restart
+ */
+static void
+shutdown_action (void *cls)
+{
+  if (NULL != timeout_task)
+  {
+    GNUNET_SCHEDULER_cancel (timeout_task);
+    timeout_task = NULL;
+  }
+  if (NULL != int_task)
+  {
+    GNUNET_SCHEDULER_cancel (int_task);
+    int_task = NULL;
+  }
+  if (NULL != fb)
+  {
+    TALER_FAKEBANK_stop (fb);
+    fb = NULL;
+  }
+  if (NULL != child_death_task)
+  {
+    GNUNET_SCHEDULER_cancel (child_death_task);
+    child_death_task = NULL;
+  }
+  if (NULL != aggregator_proc)
+  {
+    GNUNET_break (0 == GNUNET_OS_process_kill (aggregator_proc,
+                                               SIGKILL));
+    GNUNET_OS_process_wait (aggregator_proc);
+    GNUNET_OS_process_destroy (aggregator_proc);
+    aggregator_proc = NULL;
+  }
+  plugin->drop_tables (plugin->cls);
+  TALER_EXCHANGEDB_plugin_unload (plugin);
+  plugin = NULL;
+}
+
+
+/**
+ * Task triggered whenever we receive a SIGCHLD (child
+ * process died).
+ *
+ * @param cls closure, NULL if we need to self-restart
+ */
+static void
+maint_child_death (void *cls)
+{
+  const struct GNUNET_DISK_FileHandle *pr;
+  char c[16];
+  struct State *state;
+
+  child_death_task = NULL;
+  pr = GNUNET_DISK_pipe_handle (sigpipe, GNUNET_DISK_PIPE_END_READ);
+  GNUNET_break (0 < GNUNET_DISK_file_read (pr, &c, sizeof (c)));
+  GNUNET_OS_process_wait (aggregator_proc);
+  GNUNET_OS_process_destroy (aggregator_proc);
+  aggregator_proc = NULL;
+  aggregator_state->ioff++;
+  state = aggregator_state;
+  aggregator_state = NULL;
+  child_death_task = GNUNET_SCHEDULER_add_read_file (
+    GNUNET_TIME_UNIT_FOREVER_REL,
+    pr,
+    &maint_child_death, NULL);
+
+  interpreter (state);
+}
+
+
+/**
+ * Setup (fake) information about a coin used in deposit.
+ *
+ * @param[out] issue information to initialize with "valid" data
+ */
+static void
+fake_issue (struct TALER_EXCHANGEDB_DenominationKeyInformationP *issue)
+{
+  memset (issue, 0, sizeof (struct
+                            TALER_EXCHANGEDB_DenominationKeyInformationP));
+  GNUNET_assert (GNUNET_OK ==
+                 TALER_string_to_amount_nbo ("EUR:1",
+                                             &issue->properties.value));
+  GNUNET_assert (GNUNET_OK ==
+                 TALER_string_to_amount_nbo ("EUR:0.1",
+                                             &issue->properties.fee_withdraw));
+  GNUNET_assert (GNUNET_OK ==
+                 TALER_string_to_amount_nbo ("EUR:0.1",
+                                             &issue->properties.fee_deposit));
+  GNUNET_assert (GNUNET_OK ==
+                 TALER_string_to_amount_nbo ("EUR:0.1",
+                                             &issue->properties.fee_refresh));
+  GNUNET_assert (GNUNET_OK ==
+                 TALER_string_to_amount_nbo ("EUR:0.1",
+                                             &issue->properties.fee_refund));
+}
+
+
+/**
+ * Setup (fake) information about a coin used in deposit.
+ *
+ * @param[out] coin information to initialize with "valid" data
+ */
+static void
+fake_coin (struct TALER_CoinPublicInfo *coin)
+{
+  struct GNUNET_HashCode hc;
+
+  GNUNET_CRYPTO_rsa_public_key_hash (coin_pub,
+                                     &coin->denom_pub_hash);
+  GNUNET_CRYPTO_hash_create_random (GNUNET_CRYPTO_QUALITY_WEAK,
+                                    &hc);
+  coin->denom_sig.rsa_signature = GNUNET_CRYPTO_rsa_sign_fdh (coin_pk,
+                                                              &hc);
+}
+
+
+/**
+ * Helper function to fake a deposit operation.
+ *
+ * @return #GNUNET_OK on success
+ */
+static int
+do_deposit (struct Command *cmd)
+{
+  struct TALER_EXCHANGEDB_Deposit deposit;
+  struct TALER_MerchantPrivateKeyP merchant_priv;
+  int ret;
+
+  memset (&deposit,
+          0,
+          sizeof (deposit));
+  /* we derive the merchant's private key from the
+     name, to ensure that the same name always
+     results in the same key pair. */
+  GNUNET_CRYPTO_kdf (&merchant_priv,
+                     sizeof (struct TALER_MerchantPrivateKeyP),
+                     "merchant-priv",
+                     strlen ("merchant-priv"),
+                     cmd->details.deposit.merchant_name,
+                     strlen (cmd->details.deposit.merchant_name),
+                     NULL, 0);
+  GNUNET_CRYPTO_eddsa_key_get_public (&merchant_priv.eddsa_priv,
+                                      &deposit.merchant_pub.eddsa_pub);
+  /* contract is just picked at random;
+     note: we may want to write this back to 'cmd' in the future. */
+  GNUNET_CRYPTO_hash_create_random (GNUNET_CRYPTO_QUALITY_WEAK,
+                                    &deposit.h_contract_terms);
+  if ( (GNUNET_OK !=
+        TALER_string_to_amount (cmd->details.deposit.amount_with_fee,
+                                &deposit.amount_with_fee)) ||
+       (GNUNET_OK !=
+        TALER_string_to_amount (cmd->details.deposit.deposit_fee,
+                                &deposit.deposit_fee)) )
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  fake_coin (&deposit.coin);
+  /* Build JSON for wire details */
+  {
+    char *str;
+
+    GNUNET_asprintf (&str,
+                     "payto://x-taler-bank/localhost:8082/%llu",
+                     (unsigned long
+                      long) cmd->details.deposit.merchant_account);
+    deposit.receiver_wire_account
+      = json_pack ("{s:s, s:s}",
+                   "salt", "this-is-a-salt-value",
+                   "url", str);
+    GNUNET_free (str);
+  }
+  GNUNET_assert (GNUNET_OK ==
+                 TALER_JSON_merchant_wire_signature_hash (
+                   deposit.receiver_wire_account,
+                   &deposit.h_wire));
+  deposit.timestamp = GNUNET_TIME_absolute_get ();
+  GNUNET_TIME_round_abs (&deposit.timestamp);
+  deposit.wire_deadline = GNUNET_TIME_relative_to_absolute (
+    cmd->details.deposit.wire_deadline);
+  GNUNET_TIME_round_abs (&deposit.wire_deadline);
+
+  /* finally, actually perform the DB operation */
+  if ( (GNUNET_OK !=
+        plugin->start (plugin->cls,
+                       session,
+                       "aggregator-test-1")) ||
+       (0 >
+        plugin->ensure_coin_known (plugin->cls,
+                                   session,
+                                   &deposit.coin)) ||
+       (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT !=
+        plugin->insert_deposit (plugin->cls,
+                                session,
+                                &deposit)) ||
+       (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS !=
+        plugin->commit (plugin->cls,
+                        session)) )
+  {
+    GNUNET_break (0);
+    ret = GNUNET_SYSERR;
+  }
+  else
+    ret = GNUNET_OK;
+  GNUNET_CRYPTO_rsa_signature_free (deposit.coin.denom_sig.rsa_signature);
+  json_decref (deposit.receiver_wire_account);
+  return ret;
+}
+
+
+/**
+ * Fail the testcase at the current command.
+ */
+static void
+fail (struct Command *cmd)
+{
+  fprintf (stderr,
+           "Testcase failed at command `%s'\n",
+           cmd->label);
+  result = 2;
+  GNUNET_SCHEDULER_shutdown ();
+}
+
+
+/**
+ * Interprets the commands from the test program.
+ *
+ * @param cls the `struct State` of the interpreter
+ */
+static void
+interpreter (void *cls)
+{
+  struct State *state = cls;
+
+  int_task = NULL;
+  while (1)
+  {
+    struct Command *cmd = &state->commands[state->ioff];
+
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+                "Running command %u (%s)\n",
+                state->ioff,
+                cmd->label);
+    switch (cmd->opcode)
+    {
+    case OPCODE_TERMINATE_SKIP:
+      /* return skip: test not finished, but did not fail either */
+      result = 77;
+      GNUNET_SCHEDULER_shutdown ();
+      return;
+    case OPCODE_WAIT:
+      state->ioff++;
+      int_task = GNUNET_SCHEDULER_add_delayed (cmd->details.wait_delay,
+                                               &interpreter,
+                                               state);
+      return;
+    case OPCODE_RUN_AGGREGATOR:
+      GNUNET_assert (NULL == aggregator_state);
+      aggregator_state = state;
+      aggregator_proc
+        = GNUNET_OS_start_process (GNUNET_NO,
+                                   GNUNET_OS_INHERIT_STD_ALL,
+                                   NULL, NULL, NULL,
+                                   "taler-exchange-aggregator",
+                                   "taler-exchange-aggregator",
+                                   "-c", config_filename,
+                                   "-t", /* enable temporary tables */
+                                   NULL);
+      if (NULL == aggregator_proc)
+      {
+        GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                    "Failed to start taler-exchange-aggregator. Check $PATH.\n");
+        GNUNET_break (0);
+        aggregator_state = NULL;
+        fail (cmd);
+        return;
+      }
+      return;
+    case OPCODE_EXPECT_TRANSACTIONS_EMPTY:
+      if (GNUNET_OK != TALER_FAKEBANK_check_empty (fb))
+      {
+        fail (cmd);
+        return;
+      }
+      state->ioff++;
+      break;
+    case OPCODE_DATABASE_DEPOSIT:
+      if (GNUNET_OK !=
+          do_deposit (cmd))
+      {
+        fail (cmd);
+        return;
+      }
+      state->ioff++;
+      break;
+    case OPCODE_EXPECT_TRANSACTION:
+      {
+        struct TALER_Amount want_amount;
+
+        if (GNUNET_OK !=
+            TALER_string_to_amount (cmd->details.expect_transaction.amount,
+                                    &want_amount))
+        {
+          GNUNET_break (0);
+          fail (cmd);
+          return;
+        }
+        if (GNUNET_OK !=
+            TALER_FAKEBANK_check_debit (fb,
+                                        &want_amount,
+                                        cmd->details.expect_transaction.
+                                        debit_account,
+                                        cmd->details.expect_transaction.
+                                        credit_account,
+                                        cmd->details.expect_transaction.
+                                        exchange_base_url,
+                                        &cmd->details.expect_transaction.wtid))
+        {
+          fail (cmd);
+          return;
+        }
+        state->ioff++;
+        break;
+      }
+    case OPCODE_TERMINATE_SUCCESS:
+      result = 0;
+      GNUNET_SCHEDULER_shutdown ();
+      return;
+    }
+  }
+}
+
+
+/**
+ * Contains the test program. Here each step of the testcase
+ * is defined.
+ */
+static void
+run_test ()
+{
+  static struct Command commands[] = {
+    /* test running with empty DB */
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-on-empty-db"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-on-start"
+    },
+
+    /* test simple deposit */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-1",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:1",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-1"
+    },
+
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-1",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.89"
+    },
+
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-on-start"
+    },
+
+    /* test idempotency: run again on transactions already done */
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-1"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-1"
+    },
+
+    /* test combining deposits */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-2a",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:1",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-2b",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:1",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-2"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-2",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:1.79"
+    },
+
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-2"
+    },
+
+    /* test NOT combining deposits of different accounts or keys */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-3a",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:1",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-3b",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 5,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:1",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-3c",
+      .details.deposit.merchant_name = "alice",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:1",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-3"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-3a",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.89"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-3b",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.89"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-3c",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 5,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.89"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-3"
+    },
+
+    /* test NOT running deposits instantly, but after delay */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-4a",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 5 }, /* 5s */
+      .details.deposit.amount_with_fee = "EUR:0.2",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-4b",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 5 }, /* 5s */
+      .details.deposit.amount_with_fee = "EUR:0.2",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-4-early"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-4-fast"
+    },
+    {
+      .opcode = OPCODE_WAIT,
+      .label = "wait (5s)",
+      .details.wait_delay = { 1000LL * 1000 * 6 } /* 6s */
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-4-delayed"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-4",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.19"
+    },
+
+    /* test picking all deposits at earliest deadline */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-5a",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 10 }, /* 10s */
+      .details.deposit.amount_with_fee = "EUR:0.2",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-5b",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 5 }, /* 5s */
+      .details.deposit.amount_with_fee = "EUR:0.2",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-5-early"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-5-early"
+    },
+    {
+      .opcode = OPCODE_WAIT,
+      .label = "wait (5s)",
+      .details.wait_delay = { 1000LL * 1000 * 6 } /* 6s */
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-5-delayed"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-5",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.19"
+    },
+
+    /* Test NEVER running 'tiny' unless they make up minimum unit */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-6a",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:0.102",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-6a-tiny"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-6a-tiny"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-6b",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:0.102",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-6c",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:0.102",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-6c-tiny"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-6c-tiny"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-6d",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:0.102",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-6d-tiny"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-6d-tiny"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-6e",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:0.112",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-6e"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-6",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.01"
+    },
+
+    /* Test profiteering if wire deadline is short */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-7a",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:0.109",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-7a-tiny"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-7a-tiny"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-7b",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:0.119",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-7-profit"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-7",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.01"
+    },
+    /* Now check profit was actually taken */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-7c",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:0.122",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-7c-loss"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-7",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.01"
+    },
+
+    /* Test that aggregation would happen fully if wire deadline is long */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-8a",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 5 }, /* 5s */
+      .details.deposit.amount_with_fee = "EUR:0.109",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-8a-tiny"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-8a-tiny"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-8b",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 5 }, /* 5s */
+      .details.deposit.amount_with_fee = "EUR:0.109",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-8b-tiny"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-8b-tiny"
+    },
+    /* now trigger aggregate with large transaction and short deadline */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-8c",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:0.122",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-8"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-8",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.03"
+    },
+
+
+    /* Test aggregation with fees and rounding profits */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-9a",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 5 }, /* 5s */
+      .details.deposit.amount_with_fee = "EUR:0.104",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-9a-tiny"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-9a-tiny"
+    },
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-9b",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 5 }, /* 5s */
+      .details.deposit.amount_with_fee = "EUR:0.105",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-9b-tiny"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTIONS_EMPTY,
+      .label = "expect-empty-transactions-after-9b-tiny"
+    },
+    /* now trigger aggregate with large transaction and short deadline */
+    {
+      .opcode = OPCODE_DATABASE_DEPOSIT,
+      .label = "do-deposit-9c",
+      .details.deposit.merchant_name = "bob",
+      .details.deposit.merchant_account = 4,
+      .details.deposit.wire_deadline = { 1000LL * 1000 * 0 }, /* 0s */
+      .details.deposit.amount_with_fee = "EUR:0.112",
+      .details.deposit.deposit_fee = "EUR:0.1"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-deposit-9"
+    },
+    /* 0.009 + 0.009 + 0.022 - 0.001 - 0.002 - 0.008 = 0.029 => 0.02 */
+    {
+      .opcode = OPCODE_EXPECT_TRANSACTION,
+      .label = "expect-deposit-9",
+      .details.expect_transaction.debit_account = 3,
+      .details.expect_transaction.credit_account = 4,
+      .details.expect_transaction.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transaction.amount = "EUR:0.01"
+    },
+
+    /* Everything tested, terminate with success */
+    {
+      .opcode = OPCODE_TERMINATE_SUCCESS,
+      .label = "testcase-complete-terminating-with-success"
+    },
+    /* note: rest not reached, this is just sample code */
+    {
+      .opcode = OPCODE_TERMINATE_SKIP,
+      .label = "testcase-incomplete-terminating-with-skip"
+    }
+  };
+  static struct State state = {
+    .commands = commands
+  };
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Launching interpreter\n");
+  int_task = GNUNET_SCHEDULER_add_now (&interpreter,
+                                       &state);
+}
+
+
+/**
+ * Main function that will be run by the scheduler.
+ *
+ * @param cls closure with configuration
+ */
+static void
+run (void *cls)
+{
+  struct GNUNET_CONFIGURATION_Handle *cfg = cls;
+  struct TALER_EXCHANGEDB_DenominationKeyInformationP issue;
+  struct TALER_DenominationPublicKey dpk;
+
+  plugin = TALER_EXCHANGEDB_plugin_load (cfg);
+  if (NULL == plugin)
+  {
+    GNUNET_break (0);
+    result = 77;
+    return;
+  }
+  if (GNUNET_OK !=
+      plugin->create_tables (plugin->cls))
+  {
+    GNUNET_break (0);
+    TALER_EXCHANGEDB_plugin_unload (plugin);
+    plugin = NULL;
+    result = 77;
+    return;
+  }
+  session = plugin->get_session (plugin->cls);
+  GNUNET_assert (NULL != session);
+  fake_issue (&issue);
+  dpk.rsa_public_key = coin_pub;
+  GNUNET_CRYPTO_rsa_public_key_hash (dpk.rsa_public_key,
+                                     &issue.properties.denom_hash);
+  if ( (GNUNET_OK !=
+        plugin->start (plugin->cls,
+                       session,
+                       "aggregator-test-2")) ||
+       (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT !=
+        plugin->insert_denomination_info (plugin->cls,
+                                          session,
+                                          &dpk,
+                                          &issue)) ||
+       (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS !=
+        plugin->commit (plugin->cls,
+                        session)) )
+  {
+    GNUNET_break (0);
+    TALER_EXCHANGEDB_plugin_unload (plugin);
+    plugin = NULL;
+    result = 77;
+    return;
+  }
+  child_death_task =
+    GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+                                    GNUNET_DISK_pipe_handle (sigpipe,
+                                                             GNUNET_DISK_PIPE_END_READ),
+                                    &maint_child_death,
+                                    NULL);
+  GNUNET_SCHEDULER_add_shutdown (&shutdown_action,
+                                 NULL);
+  timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
+                                               &timeout_action,
+                                               NULL);
+  result = 1; /* test failed for undefined reason */
+  fb = TALER_FAKEBANK_start (8082);
+  if (NULL == fb)
+  {
+    GNUNET_SCHEDULER_shutdown ();
+    result = 77;
+    return;
+  }
+  run_test ();
+}
+
+
+/**
+ * Signal handler called for SIGCHLD.  Triggers the
+ * respective handler by writing to the trigger pipe.
+ */
+static void
+sighandler_child_death ()
+{
+  static char c;
+  int old_errno = errno;  /* back-up errno */
+
+  GNUNET_break (1 ==
+                GNUNET_DISK_file_write (GNUNET_DISK_pipe_handle
+                                          (sigpipe, GNUNET_DISK_PIPE_END_WRITE),
+                                        &c, sizeof (c)));
+  errno = old_errno;    /* restore errno */
+}
+
+
+int
+main (int argc,
+      char *const argv[])
+{
+  const char *plugin_name;
+  char *testname;
+  struct GNUNET_OS_Process *proc;
+  struct GNUNET_CONFIGURATION_Handle *cfg;
+  struct GNUNET_SIGNAL_Context *shc_chld;
+
+  result = -1;
+  if (NULL == (plugin_name = strrchr (argv[0], (int) '-')))
+  {
+    GNUNET_break (0);
+    return -1;
+  }
+  plugin_name++;
+  (void) GNUNET_asprintf (&testname,
+                          "test-taler-exchange-aggregator-%s",
+                          plugin_name);
+  (void) GNUNET_asprintf (&config_filename,
+                          "%s.conf",
+                          testname);
+  /* these might get in the way */
+  unsetenv ("XDG_DATA_HOME");
+  unsetenv ("XDG_CONFIG_HOME");
+  GNUNET_log_setup ("test_taler_exchange_aggregator",
+                    "WARNING",
+                    NULL);
+  proc = GNUNET_OS_start_process (GNUNET_NO,
+                                  GNUNET_OS_INHERIT_STD_ALL,
+                                  NULL, NULL, NULL,
+                                  "taler-exchange-keyup",
+                                  "taler-exchange-keyup",
+                                  "-c", config_filename,
+                                  NULL);
+  if (NULL == proc)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Failed to run `taler-exchange-keyup`, is your PATH correct?\n");
+    return 77;
+  }
+  GNUNET_OS_process_wait (proc);
+  GNUNET_OS_process_destroy (proc);
+  if (GNUNET_OK !=
+      GNUNET_NETWORK_test_port_free (IPPROTO_TCP,
+                                     8082))
+  {
+    fprintf (stderr,
+             "Required port %u not available, skipping.\n",
+             (unsigned int) 8082);
+    return 77;
+  }
+  cfg = GNUNET_CONFIGURATION_create ();
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_parse (cfg,
+                                  config_filename))
+  {
+    GNUNET_break (0);
+    GNUNET_free (config_filename);
+    GNUNET_free (testname);
+    return 2;
+  }
+  sigpipe = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO,
+                              GNUNET_NO, GNUNET_NO);
+  GNUNET_assert (NULL != sigpipe);
+  shc_chld =
+    GNUNET_SIGNAL_handler_install (GNUNET_SIGCHLD,
+                                   &sighandler_child_death);
+  coin_pk = GNUNET_CRYPTO_rsa_private_key_create (1024);
+  coin_pub = GNUNET_CRYPTO_rsa_private_key_get_public (coin_pk);
+  GNUNET_SCHEDULER_run (&run,
+                        cfg);
+  GNUNET_CRYPTO_rsa_private_key_free (coin_pk);
+  GNUNET_CRYPTO_rsa_public_key_free (coin_pub);
+  GNUNET_SIGNAL_handler_uninstall (shc_chld);
+  shc_chld = NULL;
+  GNUNET_DISK_pipe_close (sigpipe);
+  GNUNET_CONFIGURATION_destroy (cfg);
+  GNUNET_free (config_filename);
+  GNUNET_free (testname);
+  return result;
+}
+
+
+/* end of test_taler_exchange_aggregator.c */
diff --git a/src/lib/test_taler_exchange_wirewatch.c b/src/lib/test_taler_exchange_wirewatch.c
new file mode 100644
index 000000000..9c089a54d
--- /dev/null
+++ b/src/lib/test_taler_exchange_wirewatch.c
@@ -0,0 +1,876 @@
+/*
+  This file is part of TALER
+  (C) 2016, 2017, 2018 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 exchange/test_taler_exchange_wirewatch.c
+ * @brief Tests for taler-exchange-wirewatch and taler-exchange-aggregator logic;
+ *        Performs an invalid wire transfer to the exchange, and then checks that
+ *        wirewatch immediately sends the money back.
+ *        Then performs a valid wire transfer, waits for the reserve to expire,
+ *        and then checks that the aggregator sends the money back.
+ * @author Christian Grothoff <christian@grothoff.org>
+ */
+#include "platform.h"
+#include "taler_util.h"
+#include <gnunet/gnunet_json_lib.h>
+#include <gnunet/gnunet_pq_lib.h>
+#include "taler_json_lib.h"
+#include <microhttpd.h>
+#include "taler_fakebank_lib.h"
+
+
+/**
+ * Commands for the interpreter.
+ */
+enum OpCode
+{
+
+  /**
+   * Terminate testcase with 'skipped' result.
+   */
+  OPCODE_TERMINATE_SKIP,
+
+  /**
+   * Run taler-exchange-aggregator.
+   */
+  OPCODE_RUN_AGGREGATOR,
+
+  /**
+   * Expect that we have exhaustively gone over all transactions.
+   */
+  OPCODE_RUN_WIREWATCH,
+
+  /**
+   * Send money from bank to exchange.
+   */
+  OPCODE_RUN_TRANSFER,
+
+  /**
+   * Wait a certain amount of time.
+   */
+  OPCODE_WAIT,
+
+  /**
+   * Expect that we have received the specified transfer.
+   */
+  OPCODE_EXPECT_TRANSFER,
+
+  /**
+   * Expect that we have 'expected' all wire transfers.
+   */
+  OPCODE_EXPECT_TRANSFERS_EMPTY,
+
+  /**
+   * Finish testcase with success.
+   */
+  OPCODE_TERMINATE_SUCCESS
+};
+
+
+/**
+ * Command state for the interpreter.
+ */
+struct Command
+{
+
+  /**
+   * What instruction should we run?
+   */
+  enum OpCode opcode;
+
+  /**
+   * Human-readable label for the command.
+   */
+  const char *label;
+
+  union
+  {
+
+    /**
+     * If @e opcode is #OPCODE_EXPECT_TRANSFER, this
+     * specifies which transaction we expected.  Note that
+     * the WTID will be set, not checked!
+     */
+    struct
+    {
+
+      /**
+       * Amount to be transferred.
+       */
+      const char *amount;
+
+      /**
+       * Account to debit.
+       */
+      uint64_t debit_account;
+
+      /**
+       * Account to credit.
+       */
+      uint64_t credit_account;
+
+      /**
+       * Expected base URL for the exchange.
+       */
+      const char *exchange_base_url;
+
+      /**
+       * Subject of the transfer, set by the command.
+       */
+      struct TALER_WireTransferIdentifierRawP wtid;
+
+    } expect_transfer;
+
+
+    /**
+     * If @e opcode is #OPCODE_RUN_TRANSFER, this
+     * specifies which transaction the bank should do.
+     */
+    struct
+    {
+
+      /**
+       * Amount to be transferred.
+       */
+      const char *amount;
+
+      /**
+       * Account to debit.
+       */
+      uint64_t debit_account;
+
+      /**
+       * Account to credit.
+       */
+      uint64_t credit_account;
+
+      /**
+       * Subject of the transfer, set by the command.
+       */
+      const char *subject;
+
+      /**
+       * Serial ID of the wire transfer as assigned by the bank.
+       */
+      uint64_t serial_id;
+
+    } run_transfer;
+
+    struct
+    {
+
+      /**
+       * The handle for the aggregator process that we are testing.
+       */
+      struct GNUNET_OS_Process *aggregator_proc;
+
+      /**
+       * ID of task called whenever we get a SIGCHILD.
+       */
+      struct GNUNET_SCHEDULER_Task *child_death_task;
+
+    } aggregator;
+
+    struct
+    {
+
+      /**
+       * The handle for the wirewatch process that we are testing.
+       */
+      struct GNUNET_OS_Process *wirewatch_proc;
+
+      /**
+       * ID of task called whenever we get a SIGCHILD.
+       */
+      struct GNUNET_SCHEDULER_Task *child_death_task;
+
+    } wirewatch;
+
+    /**
+     * How long should we wait if the opcode is #OPCODE_WAIT.
+     */
+    struct GNUNET_TIME_Relative wait_delay;
+
+  } details;
+
+};
+
+
+/**
+ * State of the interpreter.
+ */
+struct State
+{
+  /**
+   * Array of commands to run.
+   */
+  struct Command*commands;
+
+  /**
+   * Offset of the next command to be run.
+   */
+  unsigned int ioff;
+};
+
+
+/**
+ * Pipe used to communicate child death via signal.
+ */
+static struct GNUNET_DISK_PipeHandle *sigpipe;
+
+/**
+ * ID of task called whenever we time out.
+ */
+static struct GNUNET_SCHEDULER_Task *timeout_task;
+
+/**
+ * Return value from main().
+ */
+static int result;
+
+/**
+ * Name of the configuration file to use.
+ */
+static char *config_filename;
+
+/**
+ * Task running the interpreter().
+ */
+static struct GNUNET_SCHEDULER_Task *int_task;
+
+/**
+ * Handle for our fake bank.
+ */
+static struct TALER_FAKEBANK_Handle *fb;
+
+
+/**
+ * Interprets the commands from the test program.
+ *
+ * @param cls the `struct State` of the interpreter
+ */
+static void
+interpreter (void *cls);
+
+
+/**
+ * Advance the IP and run the next command.
+ *
+ * @param state interpreter to advance.
+ */
+static void
+next_command (struct State *state)
+{
+  GNUNET_assert (NULL == int_task);
+  state->ioff++;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Advancing to command %s\n",
+              state->commands[state->ioff].label);
+  int_task = GNUNET_SCHEDULER_add_now (&interpreter,
+                                       state);
+}
+
+
+/**
+ * Fail the testcase at the current command.
+ */
+static void
+fail (struct Command *cmd)
+{
+  GNUNET_assert (NULL == int_task);
+  fprintf (stderr,
+           "Testcase failed at command `%s'\n",
+           cmd->label);
+  result = 2;
+  GNUNET_SCHEDULER_shutdown ();
+}
+
+
+/**
+ * Task triggered whenever we are to shutdown.
+ *
+ * @param cls closure, NULL if we need to self-restart
+ */
+static void
+timeout_action (void *cls)
+{
+  timeout_task = NULL;
+  GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+              "Test failed: timeout\n");
+  result = 2;
+  GNUNET_SCHEDULER_shutdown ();
+}
+
+
+/**
+ * Task triggered whenever we are to shutdown.
+ *
+ * @param cls our `struct State`
+ */
+static void
+shutdown_action (void *cls)
+{
+  struct State *state = cls;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "Running shutdown\n");
+  if (NULL != timeout_task)
+  {
+    GNUNET_SCHEDULER_cancel (timeout_task);
+    timeout_task = NULL;
+  }
+  if (NULL != int_task)
+  {
+    GNUNET_SCHEDULER_cancel (int_task);
+    int_task = NULL;
+  }
+  if (NULL != fb)
+  {
+    TALER_FAKEBANK_stop (fb);
+    fb = NULL;
+  }
+  for (unsigned int i = 0; i<=state->ioff; i++)
+  {
+    struct Command *cmd = &state->commands[i];
+
+    switch (cmd->opcode)
+    {
+    case OPCODE_TERMINATE_SKIP:
+      break;
+    case OPCODE_RUN_AGGREGATOR:
+      if (NULL != cmd->details.aggregator.child_death_task)
+      {
+        GNUNET_SCHEDULER_cancel (cmd->details.aggregator.child_death_task);
+        cmd->details.aggregator.child_death_task = NULL;
+      }
+      if (NULL != cmd->details.aggregator.aggregator_proc)
+      {
+        GNUNET_break (0 == GNUNET_OS_process_kill (
+                        cmd->details.aggregator.aggregator_proc,
+                        SIGKILL));
+        GNUNET_OS_process_wait (cmd->details.aggregator.aggregator_proc);
+        GNUNET_OS_process_destroy (cmd->details.aggregator.aggregator_proc);
+        cmd->details.aggregator.aggregator_proc = NULL;
+      }
+      break;
+    case OPCODE_RUN_WIREWATCH:
+      if (NULL != cmd->details.wirewatch.child_death_task)
+      {
+        GNUNET_SCHEDULER_cancel (cmd->details.wirewatch.child_death_task);
+        cmd->details.wirewatch.child_death_task = NULL;
+      }
+      if (NULL != cmd->details.wirewatch.wirewatch_proc)
+      {
+        GNUNET_break (0 == GNUNET_OS_process_kill (
+                        cmd->details.wirewatch.wirewatch_proc,
+                        SIGKILL));
+        GNUNET_OS_process_wait (cmd->details.wirewatch.wirewatch_proc);
+        GNUNET_OS_process_destroy (cmd->details.wirewatch.wirewatch_proc);
+        cmd->details.wirewatch.wirewatch_proc = NULL;
+      }
+      break;
+    case OPCODE_RUN_TRANSFER:
+      break;
+    case OPCODE_WAIT:
+      break;
+    case OPCODE_EXPECT_TRANSFER:
+      break;
+    case OPCODE_EXPECT_TRANSFERS_EMPTY:
+      break;
+    case OPCODE_TERMINATE_SUCCESS:
+      break;
+    }
+  }
+}
+
+
+/**
+ * Task triggered whenever we receive a SIGCHLD (child
+ * process died).
+ *
+ * @param cls our `struct State`
+ */
+static void
+maint_child_death (void *cls)
+{
+  struct State *state = cls;
+  const struct GNUNET_DISK_FileHandle *pr;
+  struct Command *cmd = &state->commands[state->ioff];
+  char c[16];
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Child process died for command %s\n",
+              cmd->label);
+  pr = GNUNET_DISK_pipe_handle (sigpipe,
+                                GNUNET_DISK_PIPE_END_READ);
+  GNUNET_break (0 < GNUNET_DISK_file_read (pr,
+                                           &c,
+                                           sizeof (c)));
+  switch (cmd->opcode)
+  {
+  case OPCODE_RUN_AGGREGATOR:
+    GNUNET_assert (NULL != cmd->details.aggregator.child_death_task);
+    cmd->details.aggregator.child_death_task = NULL;
+    GNUNET_OS_process_wait (cmd->details.aggregator.aggregator_proc);
+    GNUNET_OS_process_destroy (cmd->details.aggregator.aggregator_proc);
+    cmd->details.aggregator.aggregator_proc = NULL;
+    break;
+  case OPCODE_RUN_WIREWATCH:
+    GNUNET_assert (NULL != cmd->details.wirewatch.child_death_task);
+    cmd->details.wirewatch.child_death_task = NULL;
+    GNUNET_OS_process_wait (cmd->details.wirewatch.wirewatch_proc);
+    GNUNET_OS_process_destroy (cmd->details.wirewatch.wirewatch_proc);
+    cmd->details.wirewatch.wirewatch_proc = NULL;
+    break;
+  default:
+    fail (cmd);
+    return;
+  }
+  next_command (state);
+}
+
+
+/**
+ * Interprets the commands from the test program.
+ *
+ * @param cls the `struct State` of the interpreter
+ */
+static void
+interpreter (void *cls)
+{
+  struct State *state = cls;
+  struct Command *cmd = &state->commands[state->ioff];
+
+  GNUNET_assert (NULL != int_task);
+  int_task = NULL;
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "Running command %u (%s)\n",
+              state->ioff,
+              cmd->label);
+  switch (cmd->opcode)
+  {
+  case OPCODE_TERMINATE_SKIP:
+    /* return skip: test not finished, but did not fail either */
+    result = 77;
+    GNUNET_SCHEDULER_shutdown ();
+    return;
+  case OPCODE_RUN_AGGREGATOR:
+    cmd->details.aggregator.child_death_task =
+      GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+                                      GNUNET_DISK_pipe_handle (sigpipe,
+                                                               GNUNET_DISK_PIPE_END_READ),
+                                      &maint_child_death,
+                                      state);
+    cmd->details.aggregator.aggregator_proc
+      = GNUNET_OS_start_process (GNUNET_NO,
+                                 GNUNET_OS_INHERIT_STD_ALL,
+                                 NULL, NULL, NULL,
+                                 "taler-exchange-aggregator",
+                                 "taler-exchange-aggregator",
+                                 "-c", config_filename,
+                                 "-t", /* enable temporary tables */
+                                 NULL);
+    if (NULL == cmd->details.aggregator.aggregator_proc)
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "Failed to start taler-exchange-aggregator. Check $PATH.\n");
+      GNUNET_break (0);
+      fail (cmd);
+      return;
+    }
+    return;
+  case OPCODE_RUN_WIREWATCH:
+    cmd->details.wirewatch.child_death_task =
+      GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+                                      GNUNET_DISK_pipe_handle (sigpipe,
+                                                               GNUNET_DISK_PIPE_END_READ),
+                                      &maint_child_death,
+                                      state);
+    cmd->details.wirewatch.wirewatch_proc
+      = GNUNET_OS_start_process (GNUNET_NO,
+                                 GNUNET_OS_INHERIT_STD_ALL,
+                                 NULL, NULL, NULL,
+                                 "taler-exchange-wirewatch",
+                                 "taler-exchange-wirewatch",
+                                 "-c", config_filename,
+                                 "-T", /* run in test mode, exit instead of looping */
+                                 NULL);
+    if (NULL == cmd->details.wirewatch.wirewatch_proc)
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "Failed to start taler-exchange-wirewatch. Check $PATH.\n");
+      GNUNET_break (0);
+      fail (cmd);
+      return;
+    }
+    return;
+  case OPCODE_RUN_TRANSFER:
+    {
+      struct TALER_Amount amount;
+
+      if (GNUNET_OK !=
+          TALER_string_to_amount (cmd->details.run_transfer.amount,
+                                  &amount))
+      {
+        GNUNET_break (0);
+        fail (cmd);
+        return;
+      }
+      GNUNET_assert (NULL != cmd->details.run_transfer.subject);
+      cmd->details.run_transfer.serial_id
+        = TALER_FAKEBANK_make_transfer (fb,
+                                        cmd->details.run_transfer.debit_account,
+                                        cmd->details.run_transfer.credit_account,
+                                        &amount,
+                                        cmd->details.run_transfer.subject,
+                                        "https://exchange.taler.net/");
+      next_command (state);
+      return;
+    }
+  case OPCODE_WAIT:
+    state->ioff++;
+    GNUNET_assert (NULL == int_task);
+    int_task = GNUNET_SCHEDULER_add_delayed (cmd->details.wait_delay,
+                                             &interpreter,
+                                             state);
+    return;
+  case OPCODE_EXPECT_TRANSFER:
+    {
+      struct TALER_Amount want_amount;
+
+      if (GNUNET_OK !=
+          TALER_string_to_amount (cmd->details.expect_transfer.amount,
+                                  &want_amount))
+      {
+        GNUNET_break (0);
+        fail (cmd);
+        return;
+      }
+      if (GNUNET_OK !=
+          TALER_FAKEBANK_check_debit (fb,
+                                      &want_amount,
+                                      cmd->details.expect_transfer.debit_account,
+                                      cmd->details.expect_transfer.
+                                      credit_account,
+                                      cmd->details.expect_transfer.
+                                      exchange_base_url,
+                                      &cmd->details.expect_transfer.wtid))
+      {
+        fail (cmd);
+        return;
+      }
+      next_command (state);
+      return;
+    }
+  case OPCODE_EXPECT_TRANSFERS_EMPTY:
+    if (GNUNET_OK != TALER_FAKEBANK_check_empty (fb))
+    {
+      fail (cmd);
+      return;
+    }
+    next_command (state);
+    return;
+  case OPCODE_TERMINATE_SUCCESS:
+    result = 0;
+    GNUNET_SCHEDULER_shutdown ();
+    return;
+  }
+}
+
+
+/**
+ * Main function that will be run by the scheduler.
+ *
+ * @param cls closure with configuration
+ */
+static void
+run (void *cls)
+{
+  static struct Command commands[] = {
+    /* test running with empty DB */
+    {
+      .opcode = OPCODE_EXPECT_TRANSFERS_EMPTY,
+      .label = "expect-empty-transactions-on-start"
+    },
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-on-empty"
+    },
+    {
+      .opcode = OPCODE_RUN_WIREWATCH,
+      .label = "run-wirewatch-on-empty"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSFERS_EMPTY,
+      .label = "expect-empty-transactions-after-dry-run"
+    },
+    /* fill exchange's reserve at bank */
+    {
+      .opcode = OPCODE_RUN_TRANSFER,
+      .label = "run-transfer-good-to-exchange",
+      .details.run_transfer.debit_account = 4,
+      .details.run_transfer.credit_account = 3,
+      .details.run_transfer.subject =
+        "SRB8VQHNTNJWSSG7BXT24Z063ZSXN7T0MHCQCBAFC1V17BZH10D0",
+      .details.run_transfer.amount = "EUR:5.00"
+    },
+    /* creates reserve */
+    {
+      .opcode = OPCODE_RUN_WIREWATCH,
+      .label = "run-wirewatch-on-good-transfer"
+    },
+    /* clear first transfer from DLL */
+    {
+      .opcode = OPCODE_EXPECT_TRANSFER,
+      .label = "clear-good-transfer-to-exchange",
+      .details.expect_transfer.debit_account = 4,
+      .details.expect_transfer.credit_account = 3,
+      .details.expect_transfer.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transfer.amount = "EUR:5.00"
+    },
+    /* should do NOTHING, it is too early... */
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-non-expired-reserve"
+    },
+    /* check nothing happened */
+    {
+      .opcode = OPCODE_EXPECT_TRANSFERS_EMPTY,
+      .label = "expect-empty-transactions-1"
+    },
+    /* Configuration says reserves expire after 5s! */
+    {
+      .opcode = OPCODE_WAIT,
+      .label = "wait (5s)",
+      .details.wait_delay = { 1000LL * 1000 * 6 } /* 6s */
+    },
+    /* This time the reserve expired, so the money should go back... */
+    {
+      .opcode = OPCODE_RUN_AGGREGATOR,
+      .label = "run-aggregator-non-expired-reserve"
+    },
+    /* Check exchange sent money back, minus closing fee of EUR:0.01  */
+    {
+      .opcode = OPCODE_EXPECT_TRANSFER,
+      .label = "check-reserve-expiration-transfer",
+      .details.expect_transfer.debit_account = 3,
+      .details.expect_transfer.credit_account = 4,
+      .details.expect_transfer.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transfer.amount = "EUR:4.99"
+    },
+    /* check nothing else happened */
+    {
+      .opcode = OPCODE_EXPECT_TRANSFERS_EMPTY,
+      .label = "expect-empty-transactions-1"
+    },
+    /* This cannot work unless #5077 is implemented. */
+#if TEST_5077
+    {
+      .opcode = OPCODE_RUN_TRANSFER,
+      .label = "run-transfer-bad-to-exchange",
+      .details.run_transfer.debit_account = 4,
+      .details.run_transfer.credit_account = 3,
+      .details.run_transfer.subject = "random junk",
+      .details.run_transfer.amount = "EUR:5.00"
+    },
+    {
+      .opcode = OPCODE_RUN_WIREWATCH,
+      .label = "run-wirewatch-on-bad-transfer"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSFER,
+      .label = "expect-bad-transfer-to-exchange",
+      .details.expect_transfer.debit_account = 4,
+      .details.expect_transfer.credit_account = 3,
+      .details.expect_transfer.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transfer.amount = "EUR:5.00"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSFER,
+      .label = "expect-rewire-transfer-from-exchange",
+      .details.expect_transfer.debit_account = 3,
+      .details.expect_transfer.credit_account = 4,
+      .details.expect_transfer.exchange_base_url =
+        "https://exchange.taler.net/",
+      .details.expect_transfer.amount = "EUR:5.00"
+    },
+    {
+      .opcode = OPCODE_EXPECT_TRANSFERS_EMPTY,
+      .label = "expect-empty-transactions-1"
+    },
+#endif
+
+    {
+      .opcode = OPCODE_TERMINATE_SUCCESS,
+      .label = "testcase-complete-terminating-with-success"
+    }
+  };
+  static struct State state = {
+    .commands = commands
+  };
+
+  GNUNET_SCHEDULER_add_shutdown (&shutdown_action,
+                                 &state);
+  timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
+                                               &timeout_action,
+                                               &state);
+  result = 1; /* test failed for undefined reason */
+  fb = TALER_FAKEBANK_start (8082);
+  if (NULL == fb)
+  {
+    GNUNET_SCHEDULER_shutdown ();
+    result = 77;
+    return;
+  }
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Launching interpreter\n");
+  int_task = GNUNET_SCHEDULER_add_now (&interpreter,
+                                       &state);
+}
+
+
+/**
+ * Signal handler called for SIGCHLD.  Triggers the
+ * respective handler by writing to the trigger pipe.
+ */
+static void
+sighandler_child_death ()
+{
+  static char c;
+  int old_errno = errno;  /* back-up errno */
+
+  GNUNET_break (1 ==
+                GNUNET_DISK_file_write (GNUNET_DISK_pipe_handle
+                                          (sigpipe, GNUNET_DISK_PIPE_END_WRITE),
+                                        &c, sizeof (c)));
+  errno = old_errno;    /* restore errno */
+}
+
+
+int
+main (int argc,
+      char *const argv[])
+{
+  const char *plugin_name;
+  char *testname;
+  struct GNUNET_OS_Process *proc;
+  struct GNUNET_CONFIGURATION_Handle *cfg;
+  struct GNUNET_SIGNAL_Context *shc_chld;
+
+  result = -1;
+  if (NULL == (plugin_name = strrchr (argv[0], (int) '-')))
+  {
+    GNUNET_break (0);
+    return -1;
+  }
+  plugin_name++;
+  (void) GNUNET_asprintf (&testname,
+                          "test-taler-exchange-wirewatch-%s",
+                          plugin_name);
+  (void) GNUNET_asprintf (&config_filename,
+                          "%s.conf",
+                          testname);
+  /* these might get in the way */
+  unsetenv ("XDG_DATA_HOME");
+  unsetenv ("XDG_CONFIG_HOME");
+  GNUNET_log_setup ("test_taler_exchange_wirewatch",
+                    "WARNING",
+                    NULL);
+  /* check database is working */
+  {
+    struct GNUNET_PQ_Context *conn;
+    struct GNUNET_PQ_ExecuteStatement es[] = {
+      GNUNET_PQ_EXECUTE_STATEMENT_END
+    };
+
+    conn = GNUNET_PQ_connect ("postgres:///talercheck",
+                              es,
+                              NULL);
+    if (NULL == conn)
+      return 77;
+    GNUNET_PQ_disconnect (conn);
+  }
+  proc = GNUNET_OS_start_process (GNUNET_NO,
+                                  GNUNET_OS_INHERIT_STD_ALL,
+                                  NULL, NULL, NULL,
+                                  "taler-exchange-keyup",
+                                  "taler-exchange-keyup",
+                                  "-c", config_filename,
+                                  NULL);
+  if (NULL == proc)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Failed to run `taler-exchange-keyup`, is your PATH correct?\n");
+    return 77;
+  }
+  GNUNET_OS_process_wait (proc);
+  GNUNET_OS_process_destroy (proc);
+  proc = GNUNET_OS_start_process (GNUNET_NO,
+                                  GNUNET_OS_INHERIT_STD_ALL,
+                                  NULL, NULL, NULL,
+                                  "taler-exchange-dbinit",
+                                  "taler-exchange-dbinit",
+                                  "-c", config_filename,
+                                  "-r",
+                                  NULL);
+  if (NULL == proc)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Failed to run `taler-exchange-keyup`, is your PATH correct?\n");
+    return 77;
+  }
+  GNUNET_OS_process_wait (proc);
+  GNUNET_OS_process_destroy (proc);
+  if (GNUNET_OK !=
+      GNUNET_NETWORK_test_port_free (IPPROTO_TCP,
+                                     8082))
+  {
+    fprintf (stderr,
+             "Required port %u not available, skipping.\n",
+             (unsigned int) 8082);
+    return 77;
+  }
+  cfg = GNUNET_CONFIGURATION_create ();
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_parse (cfg,
+                                  config_filename))
+  {
+    GNUNET_break (0);
+    GNUNET_free (config_filename);
+    GNUNET_free (testname);
+    return 2;
+  }
+  sigpipe = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO,
+                              GNUNET_NO, GNUNET_NO);
+  GNUNET_assert (NULL != sigpipe);
+  shc_chld =
+    GNUNET_SIGNAL_handler_install (GNUNET_SIGCHLD,
+                                   &sighandler_child_death);
+  GNUNET_SCHEDULER_run (&run,
+                        cfg);
+  GNUNET_SIGNAL_handler_uninstall (shc_chld);
+  GNUNET_DISK_pipe_close (sigpipe);
+  GNUNET_CONFIGURATION_destroy (cfg);
+  GNUNET_free (config_filename);
+  GNUNET_free (testname);
+  return result;
+}
+
+
+/* end of test_taler_exchange_wirewatch.c */