Merge branch 'master' into age-withdraw-merge

37 files changed, 480 insertions, 1128 deletions

diff --git a/src/testing/taler-unified-setup.sh b/src/testing/taler-unified-setup.sh
index a52aebff1..1ddc3316e 100755
--- a/src/testing/taler-unified-setup.sh
+++ b/src/testing/taler-unified-setup.sh
@@ -29,19 +29,21 @@ set -eu
 
 # Exit, with status code "skip" (no 'real' failure)
 function exit_skip() {
-    echo " SKIP: " "$@"
+    echo " SKIP: " "$@" >&2
     exit 77
 }
 
 # Exit, with error message (hard failure)
 function exit_fail() {
-    echo " FAIL: " "$@"
+    echo " FAIL: " "$@" >&2
     exit 1
 }
 
 # Cleanup to run whenever we exit
 function cleanup()
 {
+    echo "Taler unified setup terminating!" >&2
+
     for n in $(jobs -p)
     do
         kill $n 2> /dev/null || true
@@ -53,6 +55,7 @@ function cleanup()
 # Install cleanup handler (except for kill -9)
 trap cleanup EXIT
 
+WAIT_FOR_SIGNAL=0
 START_AUDITOR=0
 START_BACKUP=0
 START_EXCHANGE=0
@@ -71,7 +74,7 @@ LOGLEVEL="DEBUG"
 DEFAULT_SLEEP="0.2"
 
 # Parse command-line options
-while getopts ':abc:d:efghl:mnr:stu:vw' OPTION; do
+while getopts ':abc:d:efghl:mnr:stu:vwW' OPTION; do
     case "$OPTION" in
         a)
             START_AUDITOR="1"
@@ -82,7 +85,7 @@ while getopts ':abc:d:efghl:mnr:stu:vw' OPTION; do
         c)
             CONF_ORIG="$OPTARG"
             ;;
-        c)
+        d)
             WIRE_DOMAIN="$OPTARG"
             ;;
         e)
@@ -142,6 +145,9 @@ while getopts ':abc:d:efghl:mnr:stu:vw' OPTION; do
         w)
             START_WIREWATCH="1"
             ;;
+        W)
+            WAIT_FOR_SIGNAL="1"
+            ;;
         ?)
         exit_fail "Unrecognized command line option"
         ;;
@@ -201,22 +207,40 @@ register_sandbox_account() {
       demobank \
       delete \
       --bank-account "$1" &> /dev/null || true
-    libeufin-cli sandbox \
-      demobank \
-      register --name "$3"
+
+    MAYBE_IBAN="${4:-}"
+    if test -n "$MAYBE_IBAN"; then
+      libeufin-cli sandbox \
+        demobank \
+        register --name "$3" --iban "$MAYBE_IBAN"
+    else
+      libeufin-cli sandbox \
+        demobank \
+        register --name "$3"
+    fi
+
     unset LIBEUFIN_SANDBOX_USERNAME
     unset LIBEUFIN_SANDBOX_PASSWORD
 }
 
 
-BANK_PORT=$(taler-config -c "$CONF" -s "BANK" -o "HTTP_PORT")
-if [ "1" = "$START_NEXUS" ]
+if [[ "1" = "$START_NEXUS" || "1" = "$START_FAKEBANK" ]]
 then
-    NEXUS_PORT="$BANK_PORT"
-    SANDBOX_PORT="1$BANK_PORT"
+    BANK_PORT=$(taler-config -c "$CONF" -s "BANK" -o "HTTP_PORT")
+    if [ "1" = "$START_NEXUS" ]
+    then
+        NEXUS_PORT="$BANK_PORT"
+        SANDBOX_PORT="1$BANK_PORT"
+    else
+        NEXUS_PORT="0"
+        SANDBOX_PORT="1$BANK_PORT"
+    fi
 else
-    NEXUS_PORT="0"
-    SANDBOX_PORT="1$BANK_PORT"
+    if [ "1" = "$START_SANDBOX" ]
+    then
+        BANK_PORT=$(taler-config -c "$CONF" -s "BANK" -o "HTTP_PORT")
+        SANDBOX_PORT="$BANK_PORT"
+    fi
 fi
 
 if [ "1" = "$START_SANDBOX" ]
@@ -256,7 +280,11 @@ then
     fi
     echo "OK"
     echo -n "Register Sandbox users ..."
-    register_sandbox_account fortytwo x "Forty Two"
+    # The specified IBAN and name must match the ones hard-coded into
+    # the C helper for the add-incoming call.  Without this value,
+    # Sandbox  won't find the target account to debit along a /add-incoming
+    # call.
+    register_sandbox_account fortytwo x "User42" FR7630006000011234567890189
     register_sandbox_account fortythree x "Forty Three"
     register_sandbox_account exchange x "Exchange Company"
     register_sandbox_account tor x "Tor Project"
@@ -610,7 +638,7 @@ then
     if [ "1" != "$OK" ]
     then
         cat "$LAST_RESPONSE"
-        exit_skip "Failed to setup exchange keys, check secmod logs"
+        exit_fail "Failed to setup exchange keys, check secmod logs"
     fi
     rm "$LAST_RESPONSE"
     echo " OK"
@@ -662,7 +690,7 @@ then
     if [ "1" != "$OK" ]
     then
         cat "$LAST_RESPONSE"
-        exit_skip " Failed to setup keys"
+        exit_fail " Failed to setup keys"
     fi
     rm "$LAST_RESPONSE"
     echo " OK"
@@ -681,7 +709,17 @@ fi
 # Signal caller that we are ready.
 echo "<<READY>>"
 
-# Wait until caller stops us.
-read
+if [ "1" = "$WAIT_FOR_SIGNAL" ]
+then
+    while true
+    do
+        sleep 0.1
+    done
+else
+    # Wait until caller stops us.
+    read
+fi
+
+echo "Taler unified setup terminating!" >&2
 
 exit 0
diff --git a/src/testing/test_auditor_api_version.c b/src/testing/test_auditor_api_version.c
index 252369fa7..dcd542ad8 100644
--- a/src/testing/test_auditor_api_version.c
+++ b/src/testing/test_auditor_api_version.c
@@ -41,7 +41,7 @@
  */
 #define CONFIG_FILE "test_auditor_api-rsa.conf"
 
-static struct TALER_AUDITOR_Handle *ah;
+static struct TALER_AUDITOR_GetConfigHandle *ah;
 
 static struct GNUNET_CURL_Context *ctx;
 
@@ -62,7 +62,11 @@ do_shutdown (void *cls)
     GNUNET_SCHEDULER_cancel (tt);
     tt = NULL;
   }
-  TALER_AUDITOR_disconnect (ah);
+  if (NULL != ah)
+  {
+    TALER_AUDITOR_get_config_cancel (ah);
+    ah = NULL;
+  }
   GNUNET_CURL_fini (ctx);
   GNUNET_CURL_gnunet_rc_destroy (rc);
 }
@@ -82,20 +86,16 @@ do_timeout (void *cls)
  * Function called with information about the auditor.
  *
  * @param cls closure
- * @param hr http response details
- * @param vi basic information about the auditor
- * @param compat protocol compatibility information
+ * @param vr response details
  */
 static void
 version_cb (void *cls,
-            const struct TALER_AUDITOR_HttpResponse *hr,
-            const struct TALER_AUDITOR_VersionInformation *vi,
-            enum TALER_AUDITOR_VersionCompatibility compat)
+            const struct TALER_AUDITOR_ConfigResponse *vr)
 {
   (void) cls;
-  (void) hr;
-  if ( (NULL != vi) &&
-       (TALER_AUDITOR_VC_MATCH == compat) )
+  ah = NULL;
+  if ( (MHD_HTTP_OK == vr->hr.http_status) &&
+       (TALER_AUDITOR_VC_MATCH == vr->details.ok.compat) )
     global_ret = 0;
   else
     global_ret = 2;
@@ -118,10 +118,10 @@ run (void *cls)
   ctx = GNUNET_CURL_init (&GNUNET_CURL_gnunet_scheduler_reschedule,
                           &rc);
   rc = GNUNET_CURL_gnunet_rc_create (ctx);
-  ah = TALER_AUDITOR_connect (ctx,
-                              auditor_url,
-                              &version_cb,
-                              NULL);
+  ah = TALER_AUDITOR_get_config (ctx,
+                                 auditor_url,
+                                 &version_cb,
+                                 NULL);
   GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
                                  NULL);
   tt = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS,
diff --git a/src/testing/test_bank_api.c b/src/testing/test_bank_api.c
index a2afdf06e..e197b152c 100644
--- a/src/testing/test_bank_api.c
+++ b/src/testing/test_bank_api.c
@@ -142,8 +142,8 @@ run (void *cls,
         "fetch-transactions-at-nexus",
         "exchange", /* from taler-nexus-prepare */
         "x", /* from taler-nexus-prepare */
-        "http://localhost:5001",
-        "my-bank-account") /* from taler-nexus-prepare */
+        "http://localhost:8082",
+        "exchange-nexus") /* from taler-nexus-prepare */
       : TALER_TESTING_cmd_sleep ("nop",
                                  0),
       TALER_TESTING_cmd_bank_debits ("history-2b",
diff --git a/src/testing/test_exchange_api.conf b/src/testing/test_exchange_api.conf
index 9ed12412e..b7f8c5c60 100644
--- a/src/testing/test_exchange_api.conf
+++ b/src/testing/test_exchange_api.conf
@@ -11,7 +11,7 @@ CURRENCY_ROUND_UNIT = EUR:0.01
 [auditor]
 BASE_URL = "http://localhost:8083/"
 PORT = 8083
-PUBLIC_KEY = SA7JVMCW3MMN7SYAWJ9AB0BGJDX6MP3PNN2JWQ3T8233MDSQC7Z0
+PUBLIC_KEY = T0XJ9QZ59YDN7QG3RE40SB2HY7W0ASR1EKF4WZDGZ1G159RSQC80
 TINY_AMOUNT = EUR:0.01
 
 [auditordb-postgres]
diff --git a/src/testing/test_exchange_api_home/taler/auditor/offline-keys/auditor.priv b/src/testing/test_exchange_api_home/taler/auditor/offline-keys/auditor.priv
new file mode 100644
index 000000000..7e712e483
--- /dev/null
+++ b/src/testing/test_exchange_api_home/taler/auditor/offline-keys/auditor.priv
@@ -0,0 +1 @@
+�G,U���{�~#r�-��H���������
\ No newline at end of file
diff --git a/src/testing/testing_api_cmd_auditor_deposit_confirmation.c b/src/testing/testing_api_cmd_auditor_deposit_confirmation.c
index c6a1516e7..5c7b76a31 100644
--- a/src/testing/testing_api_cmd_auditor_deposit_confirmation.c
+++ b/src/testing/testing_api_cmd_auditor_deposit_confirmation.c
@@ -1,6 +1,6 @@
 /*
   This file is part of TALER
-  Copyright (C) 2018, 2021 Taler Systems SA
+  Copyright (C) 2018-2023 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
@@ -132,13 +132,15 @@ do_retry (void *cls)
  * to check if the response code is acceptable.
  *
  * @param cls closure.
- * @param hr HTTP response details
+ * @param dcr response details
  */
 static void
-deposit_confirmation_cb (void *cls,
-                         const struct TALER_AUDITOR_HttpResponse *hr)
+deposit_confirmation_cb (
+  void *cls,
+  const struct TALER_AUDITOR_DepositConfirmationResponse *dcr)
 {
   struct DepositConfirmationState *dcs = cls;
+  const struct TALER_AUDITOR_HttpResponse *hr = &dcr->hr;
 
   dcs->dc = NULL;
   if (dcs->expected_response_code != hr->http_status)
@@ -208,7 +210,7 @@ deposit_confirmation_run (void *cls,
   const struct TALER_CoinSpendPrivateKeyP *coin_priv;
   const struct TALER_EXCHANGE_Keys *keys;
   const struct TALER_EXCHANGE_SigningPublicKey *spk;
-  struct TALER_AUDITOR_Handle *auditor;
+  const char *auditor_url;
   struct TALER_EXCHANGE_Handle *exchange
     = TALER_TESTING_get_exchange (is);
 
@@ -229,9 +231,14 @@ deposit_confirmation_run (void *cls,
       TALER_TESTING_interpreter_fail (is);
       return;
     }
-    GNUNET_assert (GNUNET_OK ==
-                   TALER_TESTING_get_trait_auditor (auditor_cmd,
-                                                    &auditor));
+    if (GNUNET_OK !=
+        TALER_TESTING_get_trait_auditor_url (auditor_cmd,
+                                             &auditor_url))
+    {
+      GNUNET_break (0);
+      TALER_TESTING_interpreter_fail (is);
+      return;
+    }
   }
   deposit_cmd
     = TALER_TESTING_interpreter_lookup_command (is,
@@ -317,25 +324,27 @@ deposit_confirmation_run (void *cls,
     if (GNUNET_TIME_absolute_is_zero (refund_deadline.abs_time))
       refund_deadline = timestamp;
   }
-  dcs->dc = TALER_AUDITOR_deposit_confirmation (auditor,
-                                                &h_wire,
-                                                &no_h_policy,
-                                                &h_contract_terms,
-                                                *exchange_timestamp,
-                                                *wire_deadline,
-                                                refund_deadline,
-                                                &amount_without_fee,
-                                                &coin_pub,
-                                                &merchant_pub,
-                                                exchange_pub,
-                                                exchange_sig,
-                                                &keys->master_pub,
-                                                spk->valid_from,
-                                                spk->valid_until,
-                                                spk->valid_legal,
-                                                &spk->master_sig,
-                                                &deposit_confirmation_cb,
-                                                dcs);
+  dcs->dc = TALER_AUDITOR_deposit_confirmation (
+    TALER_TESTING_interpreter_get_context (is),
+    auditor_url,
+    &h_wire,
+    &no_h_policy,
+    &h_contract_terms,
+    *exchange_timestamp,
+    *wire_deadline,
+    refund_deadline,
+    &amount_without_fee,
+    &coin_pub,
+    &merchant_pub,
+    exchange_pub,
+    exchange_sig,
+    &keys->master_pub,
+    spk->valid_from,
+    spk->valid_until,
+    spk->valid_legal,
+    &spk->master_sig,
+    &deposit_confirmation_cb,
+    dcs);
 
   if (NULL == dcs->dc)
   {
diff --git a/src/testing/testing_api_cmd_auditor_exchanges.c b/src/testing/testing_api_cmd_auditor_exchanges.c
index 070b6409d..aa9a1bfb7 100644
--- a/src/testing/testing_api_cmd_auditor_exchanges.c
+++ b/src/testing/testing_api_cmd_auditor_exchanges.c
@@ -1,6 +1,6 @@
 /*
   This file is part of TALER
-  Copyright (C) 2018 Taler Systems SA
+  Copyright (C) 2018-2023 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
@@ -127,11 +127,10 @@ do_retry (void *cls)
  */
 static void
 exchanges_cb (void *cls,
-              const struct TALER_AUDITOR_HttpResponse *hr,
-              unsigned int num_exchanges,
-              const struct TALER_AUDITOR_ExchangeInfo *ei)
+              const struct TALER_AUDITOR_ListExchangesResponse *ler)
 {
   struct ExchangesState *es = cls;
+  const struct TALER_AUDITOR_HttpResponse *hr = &ler->hr;
 
   es->leh = NULL;
   if (es->expected_response_code != hr->http_status)
@@ -164,24 +163,30 @@ exchanges_cb (void *cls,
                                      hr->http_status);
     return;
   }
+  if (MHD_HTTP_OK != hr->http_status)
+  {
+    TALER_TESTING_interpreter_next (es->is);
+    return;
+  }
   if (NULL != es->exchange_url)
   {
-    unsigned int found = GNUNET_NO;
+    bool found = false;
+    unsigned int num_exchanges = ler->details.ok.num_exchanges;
+    const struct TALER_AUDITOR_ExchangeInfo *ei = ler->details.ok.ei;
 
     for (unsigned int i = 0;
          i<num_exchanges;
          i++)
       if (0 == strcmp (es->exchange_url,
                        ei[i].exchange_url))
-        found = GNUNET_YES;
-    if (GNUNET_NO == found)
+        found = true;
+    if (! found)
     {
       TALER_LOG_ERROR ("Exchange '%s' doesn't exist at this auditor\n",
                        es->exchange_url);
       TALER_TESTING_interpreter_fail (es->is);
       return;
     }
-
     TALER_LOG_DEBUG ("Exchange '%s' exists at this auditor!\n",
                      es->exchange_url);
   }
@@ -203,7 +208,7 @@ exchanges_run (void *cls,
 {
   struct ExchangesState *es = cls;
   const struct TALER_TESTING_Command *auditor_cmd;
-  struct TALER_AUDITOR_Handle *auditor;
+  const char *auditor_url;
 
   (void) cmd;
   auditor_cmd = TALER_TESTING_interpreter_get_command (is,
@@ -214,15 +219,20 @@ exchanges_run (void *cls,
     TALER_TESTING_interpreter_fail (is);
     return;
   }
-  GNUNET_assert (GNUNET_OK ==
-                 TALER_TESTING_get_trait_auditor (auditor_cmd,
-                                                  &auditor));
-
+  if (GNUNET_OK !=
+      TALER_TESTING_get_trait_auditor_url (auditor_cmd,
+                                           &auditor_url))
+  {
+    GNUNET_break (0);
+    TALER_TESTING_interpreter_fail (is);
+    return;
+  }
   es->is = is;
-  es->leh = TALER_AUDITOR_list_exchanges (auditor,
-                                          &exchanges_cb,
-                                          es);
-
+  es->leh = TALER_AUDITOR_list_exchanges (
+    TALER_TESTING_interpreter_get_context (is),
+    auditor_url,
+    &exchanges_cb,
+    es);
   if (NULL == es->leh)
   {
     GNUNET_break (0);
@@ -287,14 +297,6 @@ exchanges_traits (void *cls,
 }
 
 
-/**
- * Create a "list exchanges" command.
- *
- * @param label command label.
- * @param auditor auditor connection.
- * @param expected_response_code expected HTTP response code.
- * @return the command.
- */
 struct TALER_TESTING_Command
 TALER_TESTING_cmd_exchanges (const char *label,
                              unsigned int expected_response_code)
@@ -318,16 +320,6 @@ TALER_TESTING_cmd_exchanges (const char *label,
 }
 
 
-/**
- * Create a "list exchanges" command and check whether
- * a particular exchange belongs to the returned bundle.
- *
- * @param label command label.
- * @param expected_response_code expected HTTP response code.
- * @param exchange_url URL of the exchange supposed to
- *  be included in the response.
- * @return the command.
- */
 struct TALER_TESTING_Command
 TALER_TESTING_cmd_exchanges_with_url (const char *label,
                                       unsigned int expected_response_code,
diff --git a/src/testing/testing_api_cmd_bank_history_credit.c b/src/testing/testing_api_cmd_bank_history_credit.c
index 286d06314..f2fb70e0a 100644
--- a/src/testing/testing_api_cmd_bank_history_credit.c
+++ b/src/testing/testing_api_cmd_bank_history_credit.c
@@ -288,8 +288,7 @@ command_cb (void *cls,
  * to be allocated, and the second to actually populate every
  * element.
  *
- * @param is interpreter state (supposedly having the
- *        current CMD pointing at a "history" CMD).
+ * @param hs history state
  * @param[out] rh history array to initialize.
  * @return number of entries in @a rh.
  */
diff --git a/src/testing/testing_api_cmd_batch_deposit.c b/src/testing/testing_api_cmd_batch_deposit.c
index 6a05071af..0a4fbd251 100644
--- a/src/testing/testing_api_cmd_batch_deposit.c
+++ b/src/testing/testing_api_cmd_batch_deposit.c
@@ -251,12 +251,15 @@ batch_deposit_run (void *cls,
                                  &wire_salt),
     GNUNET_JSON_spec_end ()
   };
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
+  const char *exchange_url
+    = TALER_TESTING_get_exchange_url (is);
 
   (void) cmd;
-  if (NULL == exchange)
+  if (NULL == exchange_url)
+  {
+    GNUNET_break (0);
     return;
+  }
   memset (cdds,
           0,
           sizeof (cdds));
@@ -383,13 +386,16 @@ batch_deposit_run (void *cls,
       .refund_deadline = ds->refund_deadline
     };
 
-    ds->dh = TALER_EXCHANGE_batch_deposit (exchange,
-                                           &dcd,
-                                           ds->num_coins,
-                                           cdds,
-                                           &batch_deposit_cb,
-                                           ds,
-                                           &ec);
+    ds->dh = TALER_EXCHANGE_batch_deposit (
+      TALER_TESTING_interpreter_get_context (is),
+      exchange_url,
+      TALER_TESTING_get_keys (is),
+      &dcd,
+      ds->num_coins,
+      cdds,
+      &batch_deposit_cb,
+      ds,
+      &ec);
   }
   if (NULL == ds->dh)
   {
diff --git a/src/testing/testing_api_cmd_contract_get.c b/src/testing/testing_api_cmd_contract_get.c
index adde3ed22..902ec4a4a 100644
--- a/src/testing/testing_api_cmd_contract_get.c
+++ b/src/testing/testing_api_cmd_contract_get.c
@@ -190,13 +190,16 @@ get_run (void *cls,
   struct ContractGetState *ds = cls;
   const struct TALER_ContractDiffiePrivateP *contract_priv;
   const struct TALER_TESTING_Command *ref;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
+  const char *exchange_url;
 
   (void) cmd;
-  if (NULL == exchange)
-    return;
   ds->is = is;
+  exchange_url = TALER_TESTING_get_exchange_url (is);
+  if (NULL == exchange_url)
+  {
+    GNUNET_break (0);
+    return;
+  }
   ref = TALER_TESTING_interpreter_lookup_command (ds->is,
                                                   ds->contract_ref);
   GNUNET_assert (NULL != ref);
@@ -210,7 +213,8 @@ get_run (void *cls,
   }
   ds->contract_priv = *contract_priv;
   ds->dh = TALER_EXCHANGE_contract_get (
-    exchange,
+    TALER_TESTING_interpreter_get_context (is),
+    exchange_url,
     contract_priv,
     &get_cb,
     ds);
diff --git a/src/testing/testing_api_cmd_deposit.c b/src/testing/testing_api_cmd_deposit.c
index 3d5c00abd..f2a3a2698 100644
--- a/src/testing/testing_api_cmd_deposit.c
+++ b/src/testing/testing_api_cmd_deposit.c
@@ -98,7 +98,7 @@ struct DepositState
   /**
    * Deposit handle while operation is running.
    */
-  struct TALER_EXCHANGE_DepositHandle *dh;
+  struct TALER_EXCHANGE_BatchDepositHandle *dh;
 
   /**
    * Timestamp of the /deposit operation in the wallet (contract signing time).
@@ -215,7 +215,7 @@ do_retry (void *cls)
  */
 static void
 deposit_cb (void *cls,
-            const struct TALER_EXCHANGE_DepositResult *dr)
+            const struct TALER_EXCHANGE_BatchDepositResult *dr)
 {
   struct DepositState *ds = cls;
 
@@ -254,10 +254,11 @@ deposit_cb (void *cls,
   }
   if (MHD_HTTP_OK == dr->hr.http_status)
   {
+    GNUNET_assert (1 == dr->details.ok.num_signatures);
     ds->deposit_succeeded = GNUNET_YES;
     ds->exchange_timestamp = dr->details.ok.deposit_timestamp;
     ds->exchange_pub = *dr->details.ok.exchange_pub;
-    ds->exchange_sig = *dr->details.ok.exchange_sig;
+    ds->exchange_sig = dr->details.ok.exchange_sigs[0];
   }
   TALER_TESTING_interpreter_next (ds->is);
 }
@@ -296,12 +297,15 @@ deposit_run (void *cls,
                                  &wire_salt),
     GNUNET_JSON_spec_end ()
   };
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
+  const char *exchange_url
+    = TALER_TESTING_get_exchange_url (is);
 
   (void) cmd;
-  if (NULL == exchange)
+  if (NULL == exchange_url)
+  {
+    GNUNET_break (0);
     return;
+  }
   ds->is = is;
   if (NULL != ds->deposit_reference)
   {
@@ -469,12 +473,16 @@ deposit_run (void *cls,
       .refund_deadline = ds->refund_deadline
     };
 
-    ds->dh = TALER_EXCHANGE_deposit (exchange,
-                                     &dcd,
-                                     &cdd,
-                                     &deposit_cb,
-                                     ds,
-                                     &ec);
+    ds->dh = TALER_EXCHANGE_batch_deposit (
+      TALER_TESTING_interpreter_get_context (is),
+      exchange_url,
+      TALER_TESTING_get_keys (is),
+      &dcd,
+      1,
+      &cdd,
+      &deposit_cb,
+      ds,
+      &ec);
   }
   if (NULL == ds->dh)
   {
@@ -505,7 +513,7 @@ deposit_cleanup (void *cls,
   {
     TALER_TESTING_command_incomplete (ds->is,
                                       cmd->label);
-    TALER_EXCHANGE_deposit_cancel (ds->dh);
+    TALER_EXCHANGE_batch_deposit_cancel (ds->dh);
     ds->dh = NULL;
   }
   if (NULL != ds->retry_task)
diff --git a/src/testing/testing_api_cmd_deposits_get.c b/src/testing/testing_api_cmd_deposits_get.c
index 972a85b7c..165af9b18 100644
--- a/src/testing/testing_api_cmd_deposits_get.c
+++ b/src/testing/testing_api_cmd_deposits_get.c
@@ -198,12 +198,8 @@ track_transaction_run (void *cls,
   struct TALER_MerchantWireHashP h_wire_details;
   struct TALER_PrivateContractHashP h_contract_terms;
   const struct TALER_MerchantPrivateKeyP *merchant_priv;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
 
   tts->cmd = cmd;
-  if (NULL == exchange)
-    return;
   tts->is = is;
   transaction_cmd
     = TALER_TESTING_interpreter_lookup_command (tts->is,
@@ -275,14 +271,17 @@ track_transaction_run (void *cls,
     return;
   }
 
-  tts->tth = TALER_EXCHANGE_deposits_get (exchange,
-                                          merchant_priv,
-                                          &h_wire_details,
-                                          &h_contract_terms,
-                                          &coin_pub,
-                                          GNUNET_TIME_UNIT_ZERO,
-                                          &deposit_wtid_cb,
-                                          tts);
+  tts->tth = TALER_EXCHANGE_deposits_get (
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
+    merchant_priv,
+    &h_wire_details,
+    &h_contract_terms,
+    &coin_pub,
+    GNUNET_TIME_UNIT_ZERO,
+    &deposit_wtid_cb,
+    tts);
   GNUNET_assert (NULL != tts->tth);
 }
 
diff --git a/src/testing/testing_api_cmd_get_auditor.c b/src/testing/testing_api_cmd_get_auditor.c
index 42c887da9..e1ae8ba54 100644
--- a/src/testing/testing_api_cmd_get_auditor.c
+++ b/src/testing/testing_api_cmd_get_auditor.c
@@ -49,9 +49,9 @@ struct GetAuditorState
   struct TALER_TESTING_Interpreter *is;
 
   /**
-   * Auditor handle we produced.
+   * Auditor handle used to get the configuration.
    */
-  struct TALER_AUDITOR_Handle *auditor;
+  struct TALER_AUDITOR_GetConfigHandle *auditor;
 
   /**
    * URL of the auditor.
@@ -70,23 +70,28 @@ struct GetAuditorState
  * Function called with information about the auditor.
  *
  * @param cls closure
- * @param hr HTTP response data
- * @param vi basic information about the auditor
- * @param compat protocol compatibility information
+ * @param vr response data
  */
 static void
 version_cb (
   void *cls,
-  const struct TALER_AUDITOR_HttpResponse *hr,
-  const struct TALER_AUDITOR_VersionInformation *vi,
-  enum TALER_AUDITOR_VersionCompatibility compat)
+  const struct TALER_AUDITOR_ConfigResponse *vr)
 {
   struct GetAuditorState *gas = cls;
 
-  if (MHD_HTTP_OK != hr->http_status)
+  gas->auditor = NULL;
+  if (MHD_HTTP_OK != vr->hr.http_status)
   {
     TALER_TESTING_unexpected_status (gas->is,
-                                     hr->http_status);
+                                     vr->hr.http_status);
+    return;
+  }
+  if ( (NULL != gas->priv_file) &&
+       (0 != GNUNET_memcmp (&gas->auditor_pub,
+                            &vr->details.ok.vi.auditor_pub)) )
+  {
+    GNUNET_break (0);
+    TALER_TESTING_interpreter_fail (gas->is);
     return;
   }
   TALER_TESTING_interpreter_next (gas->is);
@@ -130,10 +135,10 @@ get_auditor_run (void *cls,
   }
   gas->is = is;
   gas->auditor
-    = TALER_AUDITOR_connect (TALER_TESTING_interpreter_get_context (is),
-                             gas->auditor_url,
-                             &version_cb,
-                             gas);
+    = TALER_AUDITOR_get_config (TALER_TESTING_interpreter_get_context (is),
+                                gas->auditor_url,
+                                &version_cb,
+                                gas);
   if (NULL == gas->auditor)
   {
     GNUNET_break (0);
@@ -157,7 +162,8 @@ get_auditor_cleanup (void *cls,
 
   if (NULL != gas->auditor)
   {
-    TALER_AUDITOR_disconnect (gas->auditor);
+    GNUNET_break (0);
+    TALER_AUDITOR_get_config_cancel (gas->auditor);
     gas->auditor = NULL;
   }
   GNUNET_free (gas->priv_file);
@@ -186,7 +192,6 @@ get_auditor_traits (void *cls,
   struct TALER_TESTING_Trait traits[] = {
     TALER_TESTING_make_trait_auditor_priv (&gas->auditor_priv),
     TALER_TESTING_make_trait_auditor_pub (&gas->auditor_pub),
-    TALER_TESTING_make_trait_auditor (gas->auditor),
     TALER_TESTING_make_trait_auditor_url (gas->auditor_url),
     TALER_TESTING_trait_end ()
   };
diff --git a/src/testing/testing_api_cmd_get_exchange.c b/src/testing/testing_api_cmd_get_exchange.c
index 2fc8ba77e..2822616c0 100644
--- a/src/testing/testing_api_cmd_get_exchange.c
+++ b/src/testing/testing_api_cmd_get_exchange.c
@@ -189,7 +189,7 @@ get_exchange_traits (void *cls,
 {
   struct GetExchangeState *ges = cls;
   unsigned int off = (NULL == ges->master_priv_file) ? 1 : 0;
-  const struct TALER_EXCHANGE_Keys *keys
+  struct TALER_EXCHANGE_Keys *keys
     = TALER_EXCHANGE_get_keys (ges->exchange);
 
   if (NULL != keys)
@@ -198,6 +198,7 @@ get_exchange_traits (void *cls,
       TALER_TESTING_make_trait_master_priv (&ges->master_priv),
       TALER_TESTING_make_trait_master_pub (&keys->master_pub),
       TALER_TESTING_make_trait_exchange (ges->exchange),
+      TALER_TESTING_make_trait_keys (keys),
       TALER_TESTING_make_trait_exchange_url (ges->exchange_url),
       TALER_TESTING_trait_end ()
     };
diff --git a/src/testing/testing_api_cmd_kyc_proof.c b/src/testing/testing_api_cmd_kyc_proof.c
index 291378d97..c0fe7495a 100644
--- a/src/testing/testing_api_cmd_kyc_proof.c
+++ b/src/testing/testing_api_cmd_kyc_proof.c
@@ -127,13 +127,16 @@ proof_kyc_run (void *cls,
   const struct TALER_TESTING_Command *res_cmd;
   const struct TALER_PaytoHashP *h_payto;
   char *uargs;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
+  const char *exchange_url;
 
   (void) cmd;
-  if (NULL == exchange)
-    return;
   kps->is = is;
+  exchange_url = TALER_TESTING_get_exchange_url (is);
+  if (NULL == exchange_url)
+  {
+    GNUNET_break (0);
+    return;
+  }
   res_cmd = TALER_TESTING_interpreter_lookup_command (
     kps->is,
     kps->payment_target_reference);
@@ -157,12 +160,14 @@ proof_kyc_run (void *cls,
     GNUNET_asprintf (&uargs,
                      "&code=%s",
                      kps->code);
-  kps->kph = TALER_EXCHANGE_kyc_proof (exchange,
-                                       h_payto,
-                                       kps->logic,
-                                       uargs,
-                                       &proof_kyc_cb,
-                                       kps);
+  kps->kph = TALER_EXCHANGE_kyc_proof (
+    TALER_TESTING_interpreter_get_context (is),
+    exchange_url,
+    h_payto,
+    kps->logic,
+    uargs,
+    &proof_kyc_cb,
+    kps);
   GNUNET_free (uargs);
   GNUNET_assert (NULL != kps->kph);
 }
diff --git a/src/testing/testing_api_cmd_kyc_wallet_get.c b/src/testing/testing_api_cmd_kyc_wallet_get.c
index 5f6eaeb4c..fa6edab20 100644
--- a/src/testing/testing_api_cmd_kyc_wallet_get.c
+++ b/src/testing/testing_api_cmd_kyc_wallet_get.c
@@ -147,13 +147,16 @@ wallet_kyc_run (void *cls,
                 struct TALER_TESTING_Interpreter *is)
 {
   struct KycWalletGetState *kwg = cls;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
+  const char *exchange_url;
 
   kwg->cmd = cmd;
-  if (NULL == exchange)
-    return;
   kwg->is = is;
+  exchange_url = TALER_TESTING_get_exchange_url (is);
+  if (NULL == exchange_url)
+  {
+    GNUNET_break (0);
+    return;
+  }
   if (NULL != kwg->reserve_reference)
   {
     const struct TALER_TESTING_Command *res_cmd;
@@ -185,13 +188,15 @@ wallet_kyc_run (void *cls,
   GNUNET_CRYPTO_eddsa_key_get_public (&kwg->reserve_priv.eddsa_priv,
                                       &kwg->reserve_pub.eddsa_pub);
   kwg->reserve_payto_uri
-    = TALER_reserve_make_payto (TALER_EXCHANGE_get_base_url (exchange),
+    = TALER_reserve_make_payto (exchange_url,
                                 &kwg->reserve_pub);
-  kwg->kwh = TALER_EXCHANGE_kyc_wallet (exchange,
-                                        &kwg->reserve_priv,
-                                        &kwg->balance,
-                                        &wallet_kyc_cb,
-                                        kwg);
+  kwg->kwh = TALER_EXCHANGE_kyc_wallet (
+    TALER_TESTING_interpreter_get_context (is),
+    exchange_url,
+    &kwg->reserve_priv,
+    &kwg->balance,
+    &wallet_kyc_cb,
+    kwg);
   GNUNET_assert (NULL != kwg->kwh);
 }
 
diff --git a/src/testing/testing_api_cmd_purse_create_deposit.c b/src/testing/testing_api_cmd_purse_create_deposit.c
index 2f13849d2..36dbfbff1 100644
--- a/src/testing/testing_api_cmd_purse_create_deposit.c
+++ b/src/testing/testing_api_cmd_purse_create_deposit.c
@@ -189,12 +189,8 @@ deposit_run (void *cls,
 {
   struct PurseCreateDepositState *ds = cls;
   struct TALER_EXCHANGE_PurseDeposit deposits[ds->num_coin_references];
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
 
   (void) cmd;
-  if (NULL == exchange)
-    return;
   ds->is = is;
   for (unsigned int i = 0; i<ds->num_coin_references; i++)
   {
@@ -259,7 +255,9 @@ deposit_run (void *cls,
                    "pay_deadline",
                    GNUNET_JSON_from_timestamp (ds->purse_expiration)));
   ds->dh = TALER_EXCHANGE_purse_create_with_deposit (
-    exchange,
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
     &ds->purse_priv,
     &ds->merge_priv,
     &ds->contract_priv,
diff --git a/src/testing/testing_api_cmd_purse_delete.c b/src/testing/testing_api_cmd_purse_delete.c
index 758524ae2..f6b7d5735 100644
--- a/src/testing/testing_api_cmd_purse_delete.c
+++ b/src/testing/testing_api_cmd_purse_delete.c
@@ -97,12 +97,15 @@ purse_delete_run (void *cls,
   struct PurseDeleteState *pds = cls;
   const struct TALER_PurseContractPrivateKeyP *purse_priv;
   const struct TALER_TESTING_Command *ref;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
+  const char *exchange_url;
 
   (void) cmd;
-  if (NULL == exchange)
+  exchange_url = TALER_TESTING_get_exchange_url (is);
+  if (NULL == exchange_url)
+  {
+    GNUNET_break (0);
     return;
+  }
   ref = TALER_TESTING_interpreter_lookup_command (is,
                                                   pds->purse_cmd);
   if (NULL == ref)
@@ -121,7 +124,8 @@ purse_delete_run (void *cls,
   }
   pds->is = is;
   pds->pdh = TALER_EXCHANGE_purse_delete (
-    exchange,
+    TALER_TESTING_interpreter_get_context (is),
+    exchange_url,
     purse_priv,
     &purse_delete_cb,
     pds);
diff --git a/src/testing/testing_api_cmd_purse_deposit.c b/src/testing/testing_api_cmd_purse_deposit.c
index fb1d51551..8bddc53a6 100644
--- a/src/testing/testing_api_cmd_purse_deposit.c
+++ b/src/testing/testing_api_cmd_purse_deposit.c
@@ -259,11 +259,7 @@ deposit_run (void *cls,
   struct TALER_EXCHANGE_PurseDeposit deposits[ds->num_coin_references];
   const struct TALER_PurseContractPublicKeyP *purse_pub;
   const struct TALER_TESTING_Command *purse_cmd;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
 
-  if (NULL == exchange)
-    return;
   (void) cmd;
   ds->is = is;
   purse_cmd = TALER_TESTING_interpreter_lookup_command (is,
@@ -321,7 +317,9 @@ deposit_run (void *cls,
   }
 
   ds->dh = TALER_EXCHANGE_purse_deposit (
-    exchange,
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
     NULL, /* FIXME #7271: WADs support: purse exchange URL */
     &ds->purse_pub,
     ds->min_age,
diff --git a/src/testing/testing_api_cmd_purse_get.c b/src/testing/testing_api_cmd_purse_get.c
index 235ae63cd..d5246660b 100644
--- a/src/testing/testing_api_cmd_purse_get.c
+++ b/src/testing/testing_api_cmd_purse_get.c
@@ -183,11 +183,7 @@ status_run (void *cls,
 {
   struct StatusState *ss = cls;
   const struct TALER_TESTING_Command *create_purse;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
 
-  if (NULL == exchange)
-    return;
   ss->is = is;
   create_purse
     = TALER_TESTING_interpreter_lookup_command (is,
@@ -202,12 +198,15 @@ status_run (void *cls,
     TALER_TESTING_interpreter_fail (is);
     return;
   }
-  ss->pgh = TALER_EXCHANGE_purse_get (exchange,
-                                      ss->purse_pub,
-                                      ss->timeout,
-                                      ss->wait_for_merge,
-                                      &purse_status_cb,
-                                      ss);
+  ss->pgh = TALER_EXCHANGE_purse_get (
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
+    ss->purse_pub,
+    ss->timeout,
+    ss->wait_for_merge,
+    &purse_status_cb,
+    ss);
   if (! GNUNET_TIME_relative_is_zero (ss->timeout))
   {
     TALER_TESTING_interpreter_next (is);
diff --git a/src/testing/testing_api_cmd_purse_merge.c b/src/testing/testing_api_cmd_purse_merge.c
index 8f4f6b3c7..503ef162d 100644
--- a/src/testing/testing_api_cmd_purse_merge.c
+++ b/src/testing/testing_api_cmd_purse_merge.c
@@ -201,12 +201,8 @@ merge_run (void *cls,
   const struct TALER_PurseMergePrivateKeyP *merge_priv;
   const json_t *ct;
   const struct TALER_TESTING_Command *ref;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
 
   (void) cmd;
-  if (NULL == exchange)
-    return;
   ds->is = is;
   ref = TALER_TESTING_interpreter_lookup_command (ds->is,
                                                   ds->merge_ref);
@@ -322,7 +318,9 @@ merge_run (void *cls,
                                       &ds->merge_pub.eddsa_pub);
   ds->merge_timestamp = GNUNET_TIME_timestamp_get ();
   ds->dh = TALER_EXCHANGE_account_merge (
-    exchange,
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
     NULL, /* no wad */
     &ds->reserve_priv,
     &ds->purse_pub,
diff --git a/src/testing/testing_api_cmd_recoup.c b/src/testing/testing_api_cmd_recoup.c
index 9483b1582..263a33034 100644
--- a/src/testing/testing_api_cmd_recoup.c
+++ b/src/testing/testing_api_cmd_recoup.c
@@ -182,11 +182,7 @@ recoup_run (void *cls,
   char *cref;
   unsigned int idx;
   const struct TALER_ExchangeWithdrawValues *ewv;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
 
-  if (NULL == exchange)
-    return;
   ps->is = is;
   if (GNUNET_OK !=
       TALER_TESTING_parse_coin_reference (
@@ -259,13 +255,16 @@ recoup_run (void *cls,
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "Trying to recoup denomination '%s'\n",
               TALER_B2S (&denom_pub->h_key));
-  ps->ph = TALER_EXCHANGE_recoup (exchange,
-                                  denom_pub,
-                                  coin_sig,
-                                  ewv,
-                                  planchet,
-                                  &recoup_cb,
-                                  ps);
+  ps->ph = TALER_EXCHANGE_recoup (
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
+    denom_pub,
+    coin_sig,
+    ewv,
+    planchet,
+    &recoup_cb,
+    ps);
   GNUNET_assert (NULL != ps->ph);
 }
 
diff --git a/src/testing/testing_api_cmd_recoup_refresh.c b/src/testing/testing_api_cmd_recoup_refresh.c
index 1c7456c73..7de5b96df 100644
--- a/src/testing/testing_api_cmd_recoup_refresh.c
+++ b/src/testing/testing_api_cmd_recoup_refresh.c
@@ -184,11 +184,7 @@ recoup_refresh_run (void *cls,
   const struct TALER_ExchangeWithdrawValues *ewv;
   char *cref;
   unsigned int idx;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
 
-  if (NULL == exchange)
-    return;
   rrs->is = is;
   if (GNUNET_OK !=
       TALER_TESTING_parse_coin_reference (
@@ -273,15 +269,18 @@ recoup_refresh_run (void *cls,
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "Trying to recoup_refresh denomination '%s'\n",
               TALER_B2S (&denom_pub->h_key));
-  rrs->ph = TALER_EXCHANGE_recoup_refresh (exchange,
-                                           denom_pub,
-                                           coin_sig,
-                                           ewv,
-                                           rplanchet,
-                                           planchet,
-                                           idx,
-                                           &recoup_refresh_cb,
-                                           rrs);
+  rrs->ph = TALER_EXCHANGE_recoup_refresh (
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
+    denom_pub,
+    coin_sig,
+    ewv,
+    rplanchet,
+    planchet,
+    idx,
+    &recoup_refresh_cb,
+    rrs);
   GNUNET_assert (NULL != rrs->ph);
 }
 
diff --git a/src/testing/testing_api_cmd_refresh.c b/src/testing/testing_api_cmd_refresh.c
index a15e8dbc6..dfaf31fd4 100644
--- a/src/testing/testing_api_cmd_refresh.c
+++ b/src/testing/testing_api_cmd_refresh.c
@@ -496,12 +496,8 @@ refresh_reveal_run (void *cls,
   struct RefreshRevealState *rrs = cls;
   struct RefreshMeltState *rms;
   const struct TALER_TESTING_Command *melt_cmd;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
 
   rrs->cmd = cmd;
-  if (NULL == exchange)
-    return;
   rrs->is = is;
   melt_cmd = TALER_TESTING_interpreter_lookup_command (is,
                                                        rrs->melt_reference);
@@ -518,14 +514,16 @@ refresh_reveal_run (void *cls,
 
     for (unsigned int i = 0; i<rms->num_fresh_coins; i++)
       alg_values[i] = rms->mbds[i].alg_value;
-    rrs->rrh = TALER_EXCHANGE_refreshes_reveal (exchange,
-                                                &rms->rms,
-                                                &rms->refresh_data,
-                                                rms->num_fresh_coins,
-                                                alg_values,
-                                                rms->noreveal_index,
-                                                &reveal_cb,
-                                                rrs);
+    rrs->rrh = TALER_EXCHANGE_refreshes_reveal (
+      TALER_TESTING_interpreter_get_context (is),
+      TALER_TESTING_get_exchange_url (is),
+      &rms->rms,
+      &rms->refresh_data,
+      rms->num_fresh_coins,
+      alg_values,
+      rms->noreveal_index,
+      &reveal_cb,
+      rrs);
   }
   if (NULL == rrs->rrh)
   {
@@ -783,13 +781,16 @@ refresh_link_run (void *cls,
   const struct TALER_TESTING_Command *reveal_cmd;
   const struct TALER_TESTING_Command *melt_cmd;
   const struct TALER_TESTING_Command *coin_cmd;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
+  const char *exchange_url;
 
   rls->cmd = cmd;
-  if (NULL == exchange)
-    return;
   rls->is = is;
+  exchange_url = TALER_TESTING_get_exchange_url (is);
+  if (NULL == exchange_url)
+  {
+    GNUNET_break (0);
+    return;
+  }
   reveal_cmd = TALER_TESTING_interpreter_lookup_command (rls->is,
                                                          rls->reveal_reference);
   if (NULL == reveal_cmd)
@@ -832,11 +833,13 @@ refresh_link_run (void *cls,
   }
 
   /* finally, use private key from withdraw sign command */
-  rls->rlh = TALER_EXCHANGE_link (exchange,
-                                  coin_priv,
-                                  rms->refresh_data.melt_age_commitment_proof,
-                                  &link_cb,
-                                  rls);
+  rls->rlh = TALER_EXCHANGE_link (
+    TALER_TESTING_interpreter_get_context (is),
+    exchange_url,
+    coin_priv,
+    rms->refresh_data.melt_age_commitment_proof,
+    &link_cb,
+    rls);
 
   if (NULL == rls->rlh)
   {
@@ -908,12 +911,8 @@ melt_cb (void *cls,
 {
   struct RefreshMeltState *rms = cls;
   const struct TALER_EXCHANGE_HttpResponse *hr = &mr->hr;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (rms->is);
 
   rms->rmh = NULL;
-  if (NULL == exchange)
-    return;
   if (rms->expected_response_code != hr->http_status)
   {
     if (0 != rms->do_retry)
@@ -973,11 +972,14 @@ melt_cb (void *cls,
   {
     TALER_LOG_DEBUG ("Doubling the melt (%s)\n",
                      rms->cmd->label);
-    rms->rmh = TALER_EXCHANGE_melt (exchange,
-                                    &rms->rms,
-                                    &rms->refresh_data,
-                                    &melt_cb,
-                                    rms);
+    rms->rmh = TALER_EXCHANGE_melt (
+      TALER_TESTING_interpreter_get_context (rms->is),
+      TALER_TESTING_get_exchange_url (rms->is),
+      TALER_TESTING_get_keys (rms->is),
+      &rms->rms,
+      &rms->refresh_data,
+      &melt_cb,
+      rms);
     rms->double_melt = false;
     return;
   }
@@ -1149,11 +1151,14 @@ melt_run (void *cls,
     GNUNET_assert (age_restricted ==
                    (NULL != age_commitment_proof));
 
-    rms->rmh = TALER_EXCHANGE_melt (exchange,
-                                    &rms->rms,
-                                    &rms->refresh_data,
-                                    &melt_cb,
-                                    rms);
+    rms->rmh = TALER_EXCHANGE_melt (
+      TALER_TESTING_interpreter_get_context (is),
+      TALER_TESTING_get_exchange_url (is),
+      TALER_TESTING_get_keys (is),
+      &rms->rms,
+      &rms->refresh_data,
+      &melt_cb,
+      rms);
 
     if (NULL == rms->rmh)
     {
diff --git a/src/testing/testing_api_cmd_refund.c b/src/testing/testing_api_cmd_refund.c
index a3ebd2e85..b8ce85f96 100644
--- a/src/testing/testing_api_cmd_refund.c
+++ b/src/testing/testing_api_cmd_refund.c
@@ -54,11 +54,6 @@ struct RefundState
   uint64_t refund_transaction_id;
 
   /**
-   * Connection to the exchange.
-   */
-  struct TALER_EXCHANGE_Handle *exchange;
-
-  /**
    * Handle to the refund operation.
    */
   struct TALER_EXCHANGE_RefundHandle *rh;
@@ -116,9 +111,6 @@ refund_run (void *cls,
   const struct TALER_MerchantPrivateKeyP *merchant_priv;
   const struct TALER_TESTING_Command *coin_cmd;
 
-  rs->exchange = TALER_TESTING_get_exchange (is);
-  if (NULL == rs->exchange)
-    return;
   rs->is = is;
   if (GNUNET_OK !=
       TALER_string_to_amount (rs->refund_amount,
@@ -172,14 +164,17 @@ refund_run (void *cls,
     TALER_TESTING_interpreter_fail (is);
     return;
   }
-  rs->rh = TALER_EXCHANGE_refund (rs->exchange,
-                                  &refund_amount,
-                                  &h_contract_terms,
-                                  &coin,
-                                  rs->refund_transaction_id,
-                                  merchant_priv,
-                                  &refund_cb,
-                                  rs);
+  rs->rh = TALER_EXCHANGE_refund (
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
+    &refund_amount,
+    &h_contract_terms,
+    &coin,
+    rs->refund_transaction_id,
+    merchant_priv,
+    &refund_cb,
+    rs);
   GNUNET_assert (NULL != rs->rh);
 }
 
diff --git a/src/testing/testing_api_cmd_reserve_attest.c b/src/testing/testing_api_cmd_reserve_attest.c
index 77166d2b5..64b15a10d 100644
--- a/src/testing/testing_api_cmd_reserve_attest.c
+++ b/src/testing/testing_api_cmd_reserve_attest.c
@@ -152,12 +152,15 @@ attest_run (void *cls,
 {
   struct AttestState *ss = cls;
   const struct TALER_TESTING_Command *create_reserve;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
+  const char *exchange_url;
 
-  if (NULL == exchange)
-    return;
   ss->is = is;
+  exchange_url = TALER_TESTING_get_exchange_url (is);
+  if (NULL == exchange_url)
+  {
+    GNUNET_break (0);
+    return;
+  }
   create_reserve
     = TALER_TESTING_interpreter_lookup_command (is,
                                                 ss->reserve_reference);
@@ -179,12 +182,14 @@ attest_run (void *cls,
   }
   GNUNET_CRYPTO_eddsa_key_get_public (&ss->reserve_priv->eddsa_priv,
                                       &ss->reserve_pub.eddsa_pub);
-  ss->rsh = TALER_EXCHANGE_reserves_attest (exchange,
-                                            ss->reserve_priv,
-                                            ss->attrs_len,
-                                            ss->attrs,
-                                            &reserve_attest_cb,
-                                            ss);
+  ss->rsh = TALER_EXCHANGE_reserves_attest (
+    TALER_TESTING_interpreter_get_context (is),
+    exchange_url,
+    ss->reserve_priv,
+    ss->attrs_len,
+    ss->attrs,
+    &reserve_attest_cb,
+    ss);
 }
 
 
diff --git a/src/testing/testing_api_cmd_reserve_close.c b/src/testing/testing_api_cmd_reserve_close.c
index b2929f164..8e272f547 100644
--- a/src/testing/testing_api_cmd_reserve_close.c
+++ b/src/testing/testing_api_cmd_reserve_close.c
@@ -142,11 +142,7 @@ close_run (void *cls,
 {
   struct CloseState *ss = cls;
   const struct TALER_TESTING_Command *create_reserve;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
 
-  if (NULL == exchange)
-    return;
   ss->is = is;
   create_reserve
     = TALER_TESTING_interpreter_lookup_command (is,
@@ -169,11 +165,13 @@ close_run (void *cls,
   }
   GNUNET_CRYPTO_eddsa_key_get_public (&ss->reserve_priv->eddsa_priv,
                                       &ss->reserve_pub.eddsa_pub);
-  ss->rsh = TALER_EXCHANGE_reserves_close (exchange,
-                                           ss->reserve_priv,
-                                           ss->target_account,
-                                           &reserve_close_cb,
-                                           ss);
+  ss->rsh = TALER_EXCHANGE_reserves_close (
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    ss->reserve_priv,
+    ss->target_account,
+    &reserve_close_cb,
+    ss);
 }
 
 
diff --git a/src/testing/testing_api_cmd_reserve_get.c b/src/testing/testing_api_cmd_reserve_get.c
index a43459401..9a938cf82 100644
--- a/src/testing/testing_api_cmd_reserve_get.c
+++ b/src/testing/testing_api_cmd_reserve_get.c
@@ -178,12 +178,15 @@ status_run (void *cls,
 {
   struct StatusState *ss = cls;
   const struct TALER_TESTING_Command *create_reserve;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
+  const char *exchange_url;
 
-  if (NULL == exchange)
-    return;
   ss->is = is;
+  exchange_url = TALER_TESTING_get_exchange_url (is);
+  if (NULL == exchange_url)
+  {
+    GNUNET_break (0);
+    return;
+  }
   create_reserve
     = TALER_TESTING_interpreter_lookup_command (is,
                                                 ss->reserve_reference);
@@ -197,11 +200,13 @@ status_run (void *cls,
     TALER_TESTING_interpreter_fail (is);
     return;
   }
-  ss->rsh = TALER_EXCHANGE_reserves_get (exchange,
-                                         ss->reserve_pubp,
-                                         ss->timeout,
-                                         &reserve_status_cb,
-                                         ss);
+  ss->rsh = TALER_EXCHANGE_reserves_get (
+    TALER_TESTING_interpreter_get_context (is),
+    exchange_url,
+    ss->reserve_pubp,
+    ss->timeout,
+    &reserve_status_cb,
+    ss);
   if (! GNUNET_TIME_relative_is_zero (ss->timeout))
   {
     TALER_TESTING_interpreter_next (is);
diff --git a/src/testing/testing_api_cmd_reserve_get_attestable.c b/src/testing/testing_api_cmd_reserve_get_attestable.c
index 75783e041..ed1eb1355 100644
--- a/src/testing/testing_api_cmd_reserve_get_attestable.c
+++ b/src/testing/testing_api_cmd_reserve_get_attestable.c
@@ -125,12 +125,15 @@ get_attestable_run (void *cls,
   const struct TALER_TESTING_Command *ref_reserve;
   const struct TALER_ReservePrivateKeyP *reserve_priv;
   const struct TALER_ReservePublicKeyP *reserve_pub;
-  struct TALER_EXCHANGE_Handle *exchange
-    = TALER_TESTING_get_exchange (is);
+  const char *exchange_url;
 
-  if (NULL == exchange)
-    return;
   ss->is = is;
+  exchange_url = TALER_TESTING_get_exchange_url (is);
+  if (NULL == exchange_url)
+  {
+    GNUNET_break (0);
+    return;
+  }
   ref_reserve
     = TALER_TESTING_interpreter_lookup_command (is,
                                                 ss->reserve_reference);
@@ -162,10 +165,12 @@ get_attestable_run (void *cls,
     }
     ss->reserve_pub = *reserve_pub;
   }
-  ss->rgah = TALER_EXCHANGE_reserves_get_attestable (exchange,
-                                                     &ss->reserve_pub,
-                                                     &reserve_get_attestable_cb,
-                                                     ss);
+  ss->rgah = TALER_EXCHANGE_reserves_get_attestable (
+    TALER_TESTING_interpreter_get_context (is),
+    exchange_url,
+    &ss->reserve_pub,
+    &reserve_get_attestable_cb,
+    ss);
 }
 
 
diff --git a/src/testing/testing_api_cmd_reserve_history.c b/src/testing/testing_api_cmd_reserve_history.c
index e9cc11a6d..6e68bbe26 100644
--- a/src/testing/testing_api_cmd_reserve_history.c
+++ b/src/testing/testing_api_cmd_reserve_history.c
@@ -369,10 +369,13 @@ history_run (void *cls,
   }
   GNUNET_CRYPTO_eddsa_key_get_public (&ss->reserve_priv->eddsa_priv,
                                       &ss->reserve_pub.eddsa_pub);
-  ss->rsh = TALER_EXCHANGE_reserves_history (exchange,
-                                             ss->reserve_priv,
-                                             &reserve_history_cb,
-                                             ss);
+  ss->rsh = TALER_EXCHANGE_reserves_history (
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
+    ss->reserve_priv,
+    &reserve_history_cb,
+    ss);
 }
 
 
diff --git a/src/testing/testing_api_cmd_reserve_open.c b/src/testing/testing_api_cmd_reserve_open.c
index 6a6247b8d..a78662c33 100644
--- a/src/testing/testing_api_cmd_reserve_open.c
+++ b/src/testing/testing_api_cmd_reserve_open.c
@@ -256,7 +256,9 @@ open_run (void *cls,
     cpi->h_denom_pub = denom_pub->h_key;
   }
   ss->rsh = TALER_EXCHANGE_reserves_open (
-    exchange,
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
     ss->reserve_priv,
     &ss->reserve_pay,
     ss->cpl,
diff --git a/src/testing/testing_api_cmd_reserve_purse.c b/src/testing/testing_api_cmd_reserve_purse.c
index 79530803a..7a356c231 100644
--- a/src/testing/testing_api_cmd_reserve_purse.c
+++ b/src/testing/testing_api_cmd_reserve_purse.c
@@ -245,7 +245,9 @@ purse_run (void *cls,
                    GNUNET_JSON_from_timestamp (ds->purse_expiration)));
   ds->merge_timestamp = GNUNET_TIME_timestamp_get ();
   ds->dh = TALER_EXCHANGE_purse_create_with_merge (
-    exchange,
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
     &ds->reserve_priv,
     &ds->purse_priv,
     &ds->merge_priv,
diff --git a/src/testing/testing_api_cmd_reserve_status.c b/src/testing/testing_api_cmd_reserve_status.c
index 7e7b45cd7..2da1bf740 100644
--- a/src/testing/testing_api_cmd_reserve_status.c
+++ b/src/testing/testing_api_cmd_reserve_status.c
@@ -341,10 +341,13 @@ status_run (void *cls,
   }
   GNUNET_CRYPTO_eddsa_key_get_public (&ss->reserve_priv->eddsa_priv,
                                       &ss->reserve_pub.eddsa_pub);
-  ss->rsh = TALER_EXCHANGE_reserves_status (exchange,
-                                            ss->reserve_priv,
-                                            &reserve_status_cb,
-                                            ss);
+  ss->rsh = TALER_EXCHANGE_reserves_status (
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
+    ss->reserve_priv,
+    &reserve_status_cb,
+    ss);
 }
 
 
diff --git a/src/testing/testing_api_cmd_transfer_get.c b/src/testing/testing_api_cmd_transfer_get.c
index 10fe48c2c..37fe736ba 100644
--- a/src/testing/testing_api_cmd_transfer_get.c
+++ b/src/testing/testing_api_cmd_transfer_get.c
@@ -345,10 +345,13 @@ track_transfer_run (void *cls,
     }
     GNUNET_assert (NULL != wtid_ptr);
   }
-  tts->tth = TALER_EXCHANGE_transfers_get (exchange,
-                                           wtid_ptr,
-                                           &track_transfer_cb,
-                                           tts);
+  tts->tth = TALER_EXCHANGE_transfers_get (
+    TALER_TESTING_interpreter_get_context (is),
+    TALER_TESTING_get_exchange_url (is),
+    TALER_TESTING_get_keys (is),
+    wtid_ptr,
+    &track_transfer_cb,
+    tts);
   GNUNET_assert (NULL != tts->tth);
 }
 
diff --git a/src/testing/testing_api_helpers_exchange.c b/src/testing/testing_api_helpers_exchange.c
deleted file mode 100644
index 1444f1545..000000000
--- a/src/testing/testing_api_helpers_exchange.c
+++ /dev/null
@@ -1,796 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2018-2020 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 testing/testing_api_helpers_exchange.c
- * @brief helper functions
- * @author Christian Grothoff
- * @author Marcello Stanisci
- */
-#include "platform.h"
-#include "taler_json_lib.h"
-#include <gnunet/gnunet_curl_lib.h>
-#include "taler_signatures.h"
-#include "taler_extensions.h"
-#include "taler_testing_lib.h"
-
-/**
- * Run multiple taler-exchange-httpd processes in
- * parallel using GNU parallel?
- */
-#define GNU_PARALLEL 0
-
-
-void
-TALER_TESTING_cleanup_files (const char *config_name)
-{
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_parse_and_run (config_name,
-                                          &TALER_TESTING_cleanup_files_cfg,
-                                          NULL))
-    exit (77);
-}
-
-
-enum GNUNET_GenericReturnValue
-TALER_TESTING_run_auditor_exchange (const char *config_filename,
-                                    const char *exchange_master_pub,
-                                    const char *exchange_base_url,
-                                    int do_remove)
-{
-  struct GNUNET_OS_Process *proc;
-  enum GNUNET_OS_ProcessStatusType type;
-  unsigned long code;
-
-  TALER_LOG_DEBUG ("Add exchange (%s,%s) to the auditor\n",
-                   exchange_base_url,
-                   exchange_master_pub);
-
-  proc = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
-                                  NULL, NULL, NULL,
-                                  "taler-auditor-exchange",
-                                  "taler-auditor-exchange",
-                                  "-c", config_filename,
-                                  "-u", exchange_base_url,
-                                  "-m", exchange_master_pub,
-                                  (GNUNET_YES == do_remove)
-                                  ? "-r"
-                                  : NULL,
-                                  NULL);
-  if (NULL == proc)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Failed to run `taler-auditor-exchange`, is your PATH correct?\n");
-    return GNUNET_SYSERR;
-  }
-  GNUNET_assert (GNUNET_OK ==
-                 GNUNET_OS_process_wait_status (proc,
-                                                &type,
-                                                &code));
-  GNUNET_OS_process_destroy (proc);
-  if ( (0 != code) ||
-       (GNUNET_OS_PROCESS_EXITED != type) )
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "taler-auditor-exchange terminated with error (%d/%d)\n",
-                (int) type,
-                (int) code);
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-enum GNUNET_GenericReturnValue
-TALER_TESTING_exchange_db_reset (const char *config_filename)
-{
-  struct GNUNET_OS_Process *proc;
-  enum GNUNET_OS_ProcessStatusType type;
-  unsigned long code;
-
-  proc = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
-                                  NULL, NULL, NULL,
-                                  "taler-exchange-dbinit",
-                                  "taler-exchange-dbinit",
-                                  "-c", config_filename,
-                                  "-L", "WARNING",
-                                  "-r",
-                                  NULL);
-  if (NULL == proc)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Failed to run `taler-exchange-dbinit`, is your PATH correct?\n");
-    return GNUNET_NO;
-  }
-  if (GNUNET_SYSERR ==
-      GNUNET_OS_process_wait_status (proc,
-                                     &type,
-                                     &code))
-  {
-    GNUNET_break (0);
-    GNUNET_OS_process_destroy (proc);
-    return GNUNET_SYSERR;
-  }
-  GNUNET_OS_process_destroy (proc);
-  if ( (type == GNUNET_OS_PROCESS_EXITED) &&
-       (0 != code) )
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Failed to setup (exchange) database, exit code %d\n",
-                (int) code);
-    return GNUNET_NO;
-  }
-  if ( (type != GNUNET_OS_PROCESS_EXITED) ||
-       (0 != code) )
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Unexpected error (%d/%d) running `taler-exchange-dbinit'!\n",
-                (int) type,
-                (int) code);
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-enum GNUNET_GenericReturnValue
-TALER_TESTING_auditor_db_reset (const char *config_filename)
-{
-  struct GNUNET_OS_Process *proc;
-  enum GNUNET_OS_ProcessStatusType type;
-  unsigned long code;
-
-  proc = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
-                                  NULL, NULL, NULL,
-                                  "taler-auditor-dbinit",
-                                  "taler-auditor-dbinit",
-                                  "-c", config_filename,
-                                  "-R",
-                                  NULL);
-  if (NULL == proc)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Failed to run `taler-auditor-dbinit`, is your PATH correct?\n");
-    return GNUNET_NO;
-  }
-  if (GNUNET_SYSERR ==
-      GNUNET_OS_process_wait_status (proc,
-                                     &type,
-                                     &code))
-  {
-    GNUNET_break (0);
-    GNUNET_OS_process_destroy (proc);
-    return GNUNET_SYSERR;
-  }
-  GNUNET_OS_process_destroy (proc);
-  if ( (type == GNUNET_OS_PROCESS_EXITED) &&
-       (0 != code) )
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Failed to setup (auditor) database, exit code %d\n",
-                (int) code);
-    return GNUNET_NO;
-  }
-  if ( (type != GNUNET_OS_PROCESS_EXITED) ||
-       (0 != code) )
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Unexpected error (%d/%d) running `taler-auditor-dbinit'!\n",
-                (int) type,
-                (int) code);
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-/**
- * Type of closure for
- * #sign_keys_for_exchange.
- */
-struct SignInfo
-{
-  /**
-   * Members will be set to the exchange configuration.
-   */
-  struct TALER_TESTING_ExchangeConfiguration *ec;
-
-  /**
-   * Name of the configuration file to use.
-   */
-  const char *config_filename;
-
-  /**
-   * Did we reset the database?
-   */
-  int db_reset;
-};
-
-
-/**
- * Sign the keys for an exchange given configuration @a cfg.
- * The information to be signed must be in a file "auditor.in".
- *
- * @param[in,out] cls a `struct SignInfo` with further parameters
- * @param cfg configuration to use
- * @return #GNUNET_OK on success
- */
-static enum GNUNET_GenericReturnValue
-sign_keys_for_exchange (void *cls,
-                        const struct GNUNET_CONFIGURATION_Handle *cfg)
-{
-  struct SignInfo *si = cls;
-  char *exchange_master_pub;
-  int ret;
-
-  /* Load the extensions */
-  if (GNUNET_OK != TALER_extensions_init (cfg))
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "couldn't load extensions");
-    return GNUNET_SYSERR;
-  }
-
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_string (cfg,
-                                             "exchange",
-                                             "BASE_URL",
-                                             &si->ec->exchange_url))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_WARNING,
-                               "exchange",
-                               "BASE_URL");
-    si->ec->exchange_url = NULL;
-    return GNUNET_NO;
-  }
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_string (cfg,
-                                             "auditor",
-                                             "BASE_URL",
-                                             &si->ec->auditor_url))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_WARNING,
-                               "auditor",
-                               "BASE_URL");
-    GNUNET_free (si->ec->exchange_url);
-    si->ec->exchange_url = NULL;
-    si->ec->auditor_url = NULL;
-    return GNUNET_SYSERR;
-  }
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_string (cfg,
-                                             "exchange",
-                                             "MASTER_PUBLIC_KEY",
-                                             &exchange_master_pub))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                               "exchange",
-                               "MASTER_PUBLIC_KEY");
-    ret = GNUNET_SYSERR;
-    goto fail;
-  }
-  if ( (GNUNET_OK !=
-        TALER_TESTING_run_auditor_exchange (si->config_filename,
-                                            exchange_master_pub,
-                                            si->ec->exchange_url,
-                                            GNUNET_NO)) &&
-       (GNUNET_YES == si->db_reset) )
-  {
-    ret = GNUNET_NO;
-    goto fail;
-  }
-  GNUNET_free (exchange_master_pub);
-  return GNUNET_OK;
-fail:
-  GNUNET_free (si->ec->exchange_url);
-  GNUNET_free (si->ec->auditor_url);
-  si->ec->exchange_url = NULL;
-  si->ec->auditor_url = NULL;
-  return ret;
-}
-
-
-enum GNUNET_GenericReturnValue
-TALER_TESTING_prepare_exchange (const char *config_filename,
-                                int reset_db,
-                                struct TALER_TESTING_ExchangeConfiguration *ec)
-{
-  struct SignInfo si = {
-    .config_filename = config_filename,
-    .ec = ec,
-    .db_reset = reset_db
-  };
-
-  if (GNUNET_YES == reset_db)
-  {
-    if (GNUNET_OK !=
-        TALER_TESTING_exchange_db_reset (config_filename))
-      return GNUNET_NO;
-    if (GNUNET_OK !=
-        TALER_TESTING_auditor_db_reset (config_filename))
-      return GNUNET_NO;
-  }
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_parse_and_run (config_filename,
-                                          &sign_keys_for_exchange,
-                                          &si))
-    return GNUNET_NO;
-  return GNUNET_OK;
-}
-
-
-int
-TALER_TESTING_wait_exchange_ready (const char *base_url)
-{
-  char *wget_cmd;
-  unsigned int iter;
-
-  GNUNET_asprintf (&wget_cmd,
-                   "wget -q -t 1 -T 1 %sseed -o /dev/null -O /dev/null",
-                   base_url); // make sure ends with '/'
-  /* give child time to start and bind against the socket */
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-              "Waiting for `taler-exchange-httpd` service to be ready (check with: %s)\n",
-              wget_cmd);
-  iter = 0;
-  do
-  {
-    if (10 == iter)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                  "Failed to launch `taler-exchange-httpd` service (or `wget')\n");
-      GNUNET_free (wget_cmd);
-      return 77;
-    }
-    sleep (1);
-    iter++;
-  }
-  while (0 != system (wget_cmd));
-  GNUNET_free (wget_cmd);
-  return 0;
-}
-
-
-/**
- * Wait for the auditor to have started. Waits for at
- * most 10s, after that returns 77 to indicate an error.
- *
- * @param base_url what URL should we expect the auditor
- *        to be running at
- * @return 0 on success
- */
-int
-TALER_TESTING_wait_auditor_ready (const char *base_url)
-{
-  char *wget_cmd;
-  unsigned int iter;
-
-  GNUNET_asprintf (&wget_cmd,
-                   "wget -q -t 1 -T 1 %sversion -o /dev/null -O /dev/null",
-                   base_url); // make sure ends with '/'
-  /* give child time to start and bind against the socket */
-  fprintf (stderr,
-           "Waiting for `taler-auditor-httpd' to be ready at %s\n",
-           base_url);
-  iter = 0;
-  do
-  {
-    if (10 == iter)
-    {
-      fprintf (stderr,
-               "Failed to launch `taler-auditor-httpd' (or `wget')\n");
-      GNUNET_free (wget_cmd);
-      return 77;
-    }
-    fprintf (stderr, ".\n");
-    sleep (1);
-    iter++;
-  }
-  while (0 != system (wget_cmd));
-  GNUNET_free (wget_cmd);
-  return 0;
-}
-
-
-enum GNUNET_GenericReturnValue
-TALER_TESTING_setup_with_exchange (TALER_TESTING_Main main_cb,
-                                   void *main_cb_cls,
-                                   const char *config_file)
-{
-  struct TALER_TESTING_SetupContext setup_ctx = {
-    .config_filename = config_file,
-    .main_cb = main_cb,
-    .main_cb_cls = main_cb_cls
-  };
-  enum GNUNET_GenericReturnValue result;
-
-  result =
-    GNUNET_CONFIGURATION_parse_and_run (config_file,
-                                        &TALER_TESTING_setup_with_exchange_cfg,
-                                        &setup_ctx);
-  if (GNUNET_OK != result)
-    return result;
-  return GNUNET_OK;
-}
-
-
-/**
- * Stop taler-exchange-crypto helpers.
- *
- * @param[in] helpers the process handles.
- */
-static void
-stop_helpers (struct GNUNET_OS_Process *helpers[3])
-{
-  for (unsigned int i = 0; i<3; i++)
-  {
-    if (NULL == helpers[i])
-      continue;
-    GNUNET_break (0 ==
-                  GNUNET_OS_process_kill (helpers[i],
-                                          SIGTERM));
-    GNUNET_break (GNUNET_OK ==
-                  GNUNET_OS_process_wait (helpers[i]));
-    GNUNET_OS_process_destroy (helpers[i]);
-  }
-}
-
-
-/**
- * Start taler-exchange-crypto helpers.
- *
- * @param config_filename configuration file to use
- * @param[out] helpers where to store the process handles.
- */
-static enum GNUNET_GenericReturnValue
-start_helpers (const char *config_filename,
-               struct GNUNET_OS_Process *helpers[3])
-{
-  char *dir;
-  const struct GNUNET_OS_ProjectData *pd;
-
-  pd = GNUNET_OS_project_data_get ();
-  GNUNET_OS_init (TALER_project_data_default ());
-  dir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_BINDIR);
-  GNUNET_OS_init (pd);
-  if (NULL == dir)
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  {
-    char *fn;
-
-    GNUNET_asprintf (&fn,
-                     "%s/%s",
-                     dir,
-                     "taler-exchange-secmod-eddsa");
-    helpers[0] = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
-                                          NULL, NULL, NULL,
-                                          fn,
-                                          "taler-exchange-secmod-eddsa",
-                                          "-c", config_filename,
-                                          "-L", "INFO",
-                                          NULL);
-    GNUNET_free (fn);
-  }
-  {
-    char *fn;
-
-    GNUNET_asprintf (&fn,
-                     "%s/%s",
-                     dir,
-                     "taler-exchange-secmod-rsa");
-    helpers[1] = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
-                                          NULL, NULL, NULL,
-                                          fn,
-                                          "taler-exchange-secmod-rsa",
-                                          "-c", config_filename,
-                                          "-L", "INFO",
-                                          NULL);
-    GNUNET_free (fn);
-  }
-  {
-    char *fn;
-
-    GNUNET_asprintf (&fn,
-                     "%s/%s",
-                     dir,
-                     "taler-exchange-secmod-cs");
-    helpers[2] = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
-                                          NULL, NULL, NULL,
-                                          fn,
-                                          "taler-exchange-secmod-cs",
-                                          "-c", config_filename,
-                                          "-L", "INFO",
-                                          NULL);
-    GNUNET_free (fn);
-  }
-  GNUNET_free (dir);
-  if ( (NULL == helpers[0]) ||
-       (NULL == helpers[1]) ||
-       (NULL == helpers[2]) )
-  {
-    stop_helpers (helpers);
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-enum GNUNET_GenericReturnValue
-TALER_TESTING_setup_with_exchange_cfg (
-  void *cls,
-  const struct GNUNET_CONFIGURATION_Handle *cfg)
-{
-  const struct TALER_TESTING_SetupContext *setup_ctx = cls;
-  struct GNUNET_OS_Process *exchanged;
-  struct GNUNET_OS_Process *helpers[3];
-  unsigned long long port;
-  char *serve;
-  char *base_url;
-  int result;
-
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_string (cfg,
-                                             "exchange",
-                                             "SERVE",
-                                             &serve))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                               "exchange",
-                               "SERVE");
-    return GNUNET_NO;
-  }
-
-  if (0 == strcmp ("tcp",
-                   serve))
-  {
-    if (GNUNET_OK !=
-        GNUNET_CONFIGURATION_get_value_number (cfg,
-                                               "exchange",
-                                               "PORT",
-                                               &port))
-    {
-      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                                 "exchange",
-                                 "PORT");
-      GNUNET_free (serve);
-      return GNUNET_NO;
-    }
-
-    if (GNUNET_OK !=
-        GNUNET_NETWORK_test_port_free (IPPROTO_TCP,
-                                       (uint16_t) port))
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                  "Required port %llu not available, skipping.\n",
-                  port);
-      GNUNET_free (serve);
-      return GNUNET_NO;
-    }
-  }
-  GNUNET_free (serve);
-  if (GNUNET_OK !=
-      start_helpers (setup_ctx->config_filename,
-                     helpers))
-  {
-    GNUNET_break (0);
-    return 77;
-  }
-  exchanged = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
-                                       NULL, NULL, NULL,
-#if GNU_PARALLEL
-                                       "parallel",
-#endif
-                                       "taler-exchange-httpd",
-                                       "taler-exchange-httpd",
-                                       "-L", "INFO",
-                                       "-a", /* some tests may need timetravel */
-                                       "-c", setup_ctx->config_filename,
-#if GNU_PARALLEL
-                                       "-r",
-                                       ":::",
-                                       "-",
-                                       "-",
-                                       "-",
-                                       "-",
-#endif
-                                       NULL);
-  if (NULL == exchanged)
-  {
-    GNUNET_break (0);
-    stop_helpers (helpers);
-    return 77;
-  }
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_string (cfg,
-                                             "exchange",
-                                             "BASE_URL",
-                                             &base_url))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                               "exchange",
-                               "BASE_URL");
-    stop_helpers (helpers);
-    return GNUNET_NO;
-  }
-
-  if (0 != TALER_TESTING_wait_exchange_ready (base_url))
-  {
-    GNUNET_free (base_url);
-    stop_helpers (helpers);
-    GNUNET_break (0 ==
-                  GNUNET_OS_process_kill (exchanged,
-                                          SIGTERM));
-#if GNU_PARALLEL
-    /* GNU Parallel kills on 2nd SIGTERM, need to give it a
-       chance to process the 1st signal first... */
-    sleep (1);
-    GNUNET_break (0 ==
-                  GNUNET_OS_process_kill (exchanged,
-                                          SIGTERM));
-#endif
-    GNUNET_break (GNUNET_OK ==
-                  GNUNET_OS_process_wait (exchanged));
-    GNUNET_OS_process_destroy (exchanged);
-    return 77;
-  }
-  GNUNET_free (base_url);
-
-  /* NOTE: this call blocks.  */
-  result = TALER_TESTING_setup (setup_ctx->main_cb,
-                                setup_ctx->main_cb_cls,
-                                cfg,
-                                exchanged,
-                                GNUNET_YES);
-  GNUNET_break (0 ==
-                GNUNET_OS_process_kill (exchanged,
-                                        SIGTERM));
-#if GNU_PARALLEL
-  /* GNU Parallel kills on 2nd SIGTERM, need to give it a
-     chance to process the 1st signal first... */
-  sleep (1);
-  GNUNET_break (0 ==
-                GNUNET_OS_process_kill (exchanged,
-                                        SIGTERM));
-#endif
-  GNUNET_break (GNUNET_OK ==
-                GNUNET_OS_process_wait (exchanged));
-  GNUNET_OS_process_destroy (exchanged);
-  stop_helpers (helpers);
-  return result;
-}
-
-
-enum GNUNET_GenericReturnValue
-TALER_TESTING_setup_with_auditor_and_exchange_cfg (
-  void *cls,
-  const struct GNUNET_CONFIGURATION_Handle *cfg)
-{
-  const struct TALER_TESTING_SetupContext *setup_ctx = cls;
-  struct GNUNET_OS_Process *auditord;
-  unsigned long long port;
-  char *serve;
-  char *base_url;
-  int result;
-
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_string (cfg,
-                                             "auditor",
-                                             "SERVE",
-                                             &serve))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                               "auditor",
-                               "SERVE");
-    return GNUNET_NO;
-  }
-
-  if (0 == strcmp ("tcp", serve))
-  {
-    if (GNUNET_OK !=
-        GNUNET_CONFIGURATION_get_value_number (cfg,
-                                               "auditor",
-                                               "PORT",
-                                               &port))
-    {
-      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                                 "auditor",
-                                 "PORT");
-      GNUNET_free (serve);
-      return GNUNET_NO;
-    }
-
-    if (GNUNET_OK !=
-        GNUNET_NETWORK_test_port_free (IPPROTO_TCP,
-                                       (uint16_t) port))
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                  "Required port %llu not available, skipping.\n",
-                  port);
-      GNUNET_free (serve);
-      return GNUNET_NO;
-    }
-  }
-  GNUNET_free (serve);
-  auditord = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
-                                      NULL, NULL, NULL,
-                                      "taler-auditor-httpd",
-                                      "taler-auditor-httpd",
-                                      "-c", setup_ctx->config_filename,
-                                      NULL);
-
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_string (cfg,
-                                             "auditor",
-                                             "BASE_URL",
-                                             &base_url))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                               "auditor",
-                               "BASE_URL");
-    return GNUNET_NO;
-  }
-
-  if (0 != TALER_TESTING_wait_auditor_ready (base_url))
-  {
-    GNUNET_free (base_url);
-    GNUNET_break (0 ==
-                  GNUNET_OS_process_kill (auditord,
-                                          SIGTERM));
-    GNUNET_break (GNUNET_OK ==
-                  GNUNET_OS_process_wait (auditord));
-    GNUNET_OS_process_destroy (auditord);
-    return 77;
-  }
-  GNUNET_free (base_url);
-
-  /* NOTE: this call blocks.  */
-  result = TALER_TESTING_setup_with_exchange_cfg ((void *) setup_ctx,
-                                                  cfg);
-  GNUNET_break (0 ==
-                GNUNET_OS_process_kill (auditord,
-                                        SIGTERM));
-  GNUNET_break (GNUNET_OK ==
-                GNUNET_OS_process_wait (auditord));
-  GNUNET_OS_process_destroy (auditord);
-  return result;
-}
-
-
-enum GNUNET_GenericReturnValue
-TALER_TESTING_setup_with_auditor_and_exchange (TALER_TESTING_Main main_cb,
-                                               void *main_cb_cls,
-                                               const char *config_file)
-{
-  struct TALER_TESTING_SetupContext setup_ctx = {
-    .config_filename = config_file,
-    .main_cb = main_cb,
-    .main_cb_cls = main_cb_cls
-  };
-
-  return GNUNET_CONFIGURATION_parse_and_run (
-    config_file,
-    &TALER_TESTING_setup_with_auditor_and_exchange_cfg,
-    &setup_ctx);
-}
-
-
-/* end of testing_api_helpers_exchange.c */
diff --git a/src/testing/testing_api_loop.c b/src/testing/testing_api_loop.c
index ea6b805b0..411e47c45 100644
--- a/src/testing/testing_api_loop.c
+++ b/src/testing/testing_api_loop.c
@@ -385,7 +385,7 @@ do_timeout (void *cls)
  *
  * @param cls the `struct TALER_TESTING_Interpreter *`
  * @param type type of the process
- * @param exit_code status code of the process
+ * @param code status code of the process
  */
 static void
 maint_child_death (void *cls,
diff --git a/src/testing/testing_api_traits.c b/src/testing/testing_api_traits.c
index d84e2c37e..d00a8d8ca 100644
--- a/src/testing/testing_api_traits.c
+++ b/src/testing/testing_api_traits.c
@@ -102,4 +102,59 @@ TALER_TESTING_get_exchange (struct TALER_TESTING_Interpreter *is)
 }
 
 
+const char *
+TALER_TESTING_get_exchange_url (struct TALER_TESTING_Interpreter *is)
+{
+  const char *exchange_url;
+  const struct TALER_TESTING_Command *exchange_cmd;
+
+  exchange_cmd
+    = TALER_TESTING_interpreter_get_command (is,
+                                             "exchange");
+  if (NULL == exchange_cmd)
+  {
+    GNUNET_break (0);
+    TALER_TESTING_interpreter_fail (is);
+    return NULL;
+  }
+  if (GNUNET_OK !=
+      TALER_TESTING_get_trait_exchange_url (exchange_cmd,
+                                            &exchange_url))
+  {
+    GNUNET_break (0);
+    TALER_TESTING_interpreter_fail (is);
+    return NULL;
+  }
+  return exchange_url;
+}
+
+
+struct TALER_EXCHANGE_Keys *
+TALER_TESTING_get_keys (
+  struct TALER_TESTING_Interpreter *is)
+{
+  struct TALER_EXCHANGE_Keys *keys;
+  const struct TALER_TESTING_Command *exchange_cmd;
+
+  exchange_cmd
+    = TALER_TESTING_interpreter_get_command (is,
+                                             "exchange");
+  if (NULL == exchange_cmd)
+  {
+    GNUNET_break (0);
+    TALER_TESTING_interpreter_fail (is);
+    return NULL;
+  }
+  if (GNUNET_OK !=
+      TALER_TESTING_get_trait_keys (exchange_cmd,
+                                    &keys))
+  {
+    GNUNET_break (0);
+    TALER_TESTING_interpreter_fail (is);
+    return NULL;
+  }
+  return keys;
+}
+
+
 /* end of testing_api_traits.c */