Changing configuration structure to enable multiple accounts.

This change enables using multiple wire plugins at the same time.
Also, we now distinguish between the wire plugin (i.e. EBICS or
taler_bank) and the wire method (i.e. SEPA or x-taler-bank) that
the wire plugin is implementing.  The "taler-bank" wire method
was renamed from "test" to "x-taler-bank".

This also changes the format of the /wire response of the exchange,
as we now need to return multiple accounts.  Note that wire fees
are specified per wire method, not per wire account.

taler-exchange-keyup now automatically signs all of the /wire
responses in the location specified by the configuration.

Account identification in wire plugins was changed to use
payto://-URLs instead of method-specific JSON fields.  Signing
and validation of /wire responses was moved from each wire
plugin to a generic validation method in libtalerutil (crypto)
or libtalerjson (for JSON-formatted inputs).
Convenience methods were added to generate JSON for wire accounts
(salting, signing).

Various section and option names were adjusted to streamline the
configuration and make it more consistent overall.  Documentation
was updated as well.

16 files changed, 59 insertions, 3619 deletions

diff --git a/src/wire/Makefile.am b/src/wire/Makefile.am
index 5f651461e..9fcf877f9 100644
--- a/src/wire/Makefile.am
+++ b/src/wire/Makefile.am
@@ -8,114 +8,15 @@ endif
 
 pkgcfgdir = $(prefix)/share/taler/config.d/
 
-pkgcfg_DATA = \
-  wire-sepa.conf \
-  wire-test.conf
-
-
-EXTRA_DIST = \
-  wire-sepa.conf \
-  wire-test.conf \
-  test_wire_plugin.conf \
-  test_wire_plugin_transactions_test.conf \
-  test_wire_plugin_key.priv \
-  test_wire_plugin_test.json \
-  test_wire_plugin_sepa.json 
-
-plugindir = $(libdir)/taler
-
-plugin_LTLIBRARIES = \
-  libtaler_plugin_wire_sepa.la \
-  libtaler_plugin_wire_test.la
-
-noinst_LTLIBRARIES = \
-  libtaler_plugin_wire_template.la
-
 lib_LTLIBRARIES = \
   libtalerwire.la
 
-
-libtaler_plugin_wire_test_la_SOURCES = \
-  plugin_wire_test.c
-libtaler_plugin_wire_test_la_LIBADD = \
-  $(LTLIBINTL)
-libtaler_plugin_wire_test_la_LDFLAGS = \
-  $(TALER_PLUGIN_LDFLAGS) \
-  $(top_builddir)/src/bank-lib/libtalerbank.la \
-  $(top_builddir)/src/util/libtalerutil.la \
-  -lgnunetcurl \
-  -lgnunetutil $(XLIB)
-
-
-libtaler_plugin_wire_sepa_la_SOURCES = \
-  plugin_wire_sepa.c
-libtaler_plugin_wire_sepa_la_LIBADD = \
-  $(LTLIBINTL)
-libtaler_plugin_wire_sepa_la_LDFLAGS = \
-  $(TALER_PLUGIN_LDFLAGS) \
-  $(top_builddir)/src/json/libtalerjson.la \
-  $(top_builddir)/src/util/libtalerutil.la \
-  -lgnunetjson \
-  -lgnunetutil $(XLIB)
-
-
-libtaler_plugin_wire_template_la_SOURCES = \
-  plugin_wire_template.c
-libtaler_plugin_wire_template_la_LIBADD = \
-  $(LTLIBINTL)
-libtaler_plugin_wire_template_la_LDFLAGS = \
-  $(TALER_PLUGIN_LDFLAGS) \
-  $(top_builddir)/src/util/libtalerutil.la \
-  -lgnunetutil $(XLIB)
-
-
 libtalerwire_la_SOURCES = \
-  wire.c
+  wire.c \
+  wire_helper.c
 libtalerwire_la_LIBADD = \
   -lgnunetutil \
   $(XLIB)
 libtalerwire_la_LDFLAGS = \
   -version-info 1:0:0 \
   -export-dynamic -no-undefined
-
-
-AM_TESTS_ENVIRONMENT=export TALER_PREFIX=$${TALER_PREFIX:-@libdir@};export PATH=$${TALER_PREFIX:-@prefix@}/bin:$$PATH;
-
-TESTS = \
- test_sepa_wireformat \
- test_wire_plugin
-
-check_PROGRAMS= \
- test_sepa_wireformat \
- test_wire_plugin \
- test_wire_plugin_transactions_test
-
-
-test_sepa_wireformat_SOURCES = \
-  test_sepa_wireformat.c
-test_sepa_wireformat_LDADD = \
-  -lgnunetutil \
-  -ljansson \
-  libtalerwire.la \
-  $(top_builddir)/src/util/libtalerutil.la
-
-
-test_wire_plugin_SOURCES = \
-  test_wire_plugin.c
-test_wire_plugin_LDADD = \
-  -lgnunetjson \
-  -lgnunetutil \
-  -ljansson \
-  libtalerwire.la \
-  $(top_builddir)/src/util/libtalerutil.la
-
-
-test_wire_plugin_transactions_test_SOURCES = \
-  test_wire_plugin_transactions_test.c
-test_wire_plugin_transactions_test_LDADD = \
-  -lgnunetjson \
-  -lgnunetutil \
-  -ljansson \
-  libtalerwire.la \
-  $(top_builddir)/src/bank-lib/libtalerfakebank.la \
-  $(top_builddir)/src/util/libtalerutil.la
diff --git a/src/wire/plugin_wire_sepa.c b/src/wire/plugin_wire_sepa.c
deleted file mode 100644
index 416acac7c..000000000
--- a/src/wire/plugin_wire_sepa.c
+++ /dev/null
@@ -1,960 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2016, 2017 GNUnet e.V. & Inria
-
-  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 plugin_wire_sepa.c
- * @brief wire plugin for transfers using SEPA/EBICS
- * @author Florian Dold
- * @author Christian Grothoff
- * @author Sree Harsha Totakura
- */
-#include "platform.h"
-#include "taler_wire_plugin.h"
-#include "taler_signatures.h"
-#include <gnunet/gnunet_json_lib.h>
-
-
-/**
- * Type of the "cls" argument given to each of the functions in
- * our API.
- */
-struct SepaClosure
-{
-
-  /**
-   * Which currency do we support?
-   */
-  char *currency;
-
-};
-
-
-/**
- * Round amount DOWN to the amount that can be transferred via the wire
- * method.  For example, Taler may support 0.000001 EUR as a unit of
- * payment, but SEPA only supports 0.01 EUR.  This function would
- * round 0.125 EUR to 0.12 EUR in this case.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param[in,out] amount amount to round down
- * @return #GNUNET_OK on success, #GNUNET_NO if rounding was unnecessary,
- *         #GNUNET_SYSERR if the amount or currency was invalid
- */
-static int
-sepa_amount_round (void *cls,
-                   struct TALER_Amount *amount)
-{
-  struct SepaClosure *sc = cls;
-  uint32_t delta;
-
-  if (NULL == sc->currency)
-    return GNUNET_SYSERR;
-  if (0 != strcasecmp (amount->currency,
-                       sc->currency))
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  delta = amount->fraction % (TALER_AMOUNT_FRAC_BASE / 100);
-  if (0 == delta)
-    return GNUNET_NO;
-  amount->fraction -= delta;
-  return GNUNET_OK;
-}
-
-
-/* Taken from GNU gettext */
-
-/**
- * Entry in the country table.
- */
-struct table_entry
-{
-  /**
-   * 2-Character international country code.
-   */
-  const char *code;
-
-  /**
-   * Long English name of the country.
-   */
-  const char *english;
-};
-
-
-/* Keep the following table in sync with gettext.
-   WARNING: the entries should stay sorted according to the code */
-/**
- * List of country codes.
- */
-static const struct table_entry country_table[] =
-  {
-    { "AE", "U.A.E." },
-    { "AF", "Afghanistan" },
-    { "AL", "Albania" },
-    { "AM", "Armenia" },
-    { "AN", "Netherlands Antilles" },
-    { "AR", "Argentina" },
-    { "AT", "Austria" },
-    { "AU", "Australia" },
-    { "AZ", "Azerbaijan" },
-    { "BA", "Bosnia and Herzegovina" },
-    { "BD", "Bangladesh" },
-    { "BE", "Belgium" },
-    { "BG", "Bulgaria" },
-    { "BH", "Bahrain" },
-    { "BN", "Brunei Darussalam" },
-    { "BO", "Bolivia" },
-    { "BR", "Brazil" },
-    { "BT", "Bhutan" },
-    { "BY", "Belarus" },
-    { "BZ", "Belize" },
-    { "CA", "Canada" },
-    { "CG", "Congo" },
-    { "CH", "Switzerland" },
-    { "CI", "Cote d'Ivoire" },
-    { "CL", "Chile" },
-    { "CM", "Cameroon" },
-    { "CN", "People's Republic of China" },
-    { "CO", "Colombia" },
-    { "CR", "Costa Rica" },
-    { "CS", "Serbia and Montenegro" },
-    { "CZ", "Czech Republic" },
-    { "DE", "Germany" },
-    { "DK", "Denmark" },
-    { "DO", "Dominican Republic" },
-    { "DZ", "Algeria" },
-    { "EC", "Ecuador" },
-    { "EE", "Estonia" },
-    { "EG", "Egypt" },
-    { "ER", "Eritrea" },
-    { "ES", "Spain" },
-    { "ET", "Ethiopia" },
-    { "FI", "Finland" },
-    { "FO", "Faroe Islands" },
-    { "FR", "France" },
-    { "GB", "United Kingdom" },
-    { "GD", "Caribbean" },
-    { "GE", "Georgia" },
-    { "GL", "Greenland" },
-    { "GR", "Greece" },
-    { "GT", "Guatemala" },
-    { "HK", "Hong Kong" },
-    { "HK", "Hong Kong S.A.R." },
-    { "HN", "Honduras" },
-    { "HR", "Croatia" },
-    { "HT", "Haiti" },
-    { "HU", "Hungary" },
-    { "ID", "Indonesia" },
-    { "IE", "Ireland" },
-    { "IL", "Israel" },
-    { "IN", "India" },
-    { "IQ", "Iraq" },
-    { "IR", "Iran" },
-    { "IS", "Iceland" },
-    { "IT", "Italy" },
-    { "JM", "Jamaica" },
-    { "JO", "Jordan" },
-    { "JP", "Japan" },
-    { "KE", "Kenya" },
-    { "KG", "Kyrgyzstan" },
-    { "KH", "Cambodia" },
-    { "KR", "South Korea" },
-    { "KW", "Kuwait" },
-    { "KZ", "Kazakhstan" },
-    { "LA", "Laos" },
-    { "LB", "Lebanon" },
-    { "LI", "Liechtenstein" },
-    { "LK", "Sri Lanka" },
-    { "LT", "Lithuania" },
-    { "LU", "Luxembourg" },
-    { "LV", "Latvia" },
-    { "LY", "Libya" },
-    { "MA", "Morocco" },
-    { "MC", "Principality of Monaco" },
-    { "MD", "Moldava" },
-    { "MD", "Moldova" },
-    { "ME", "Montenegro" },
-    { "MK", "Former Yugoslav Republic of Macedonia" },
-    { "ML", "Mali" },
-    { "MM", "Myanmar" },
-    { "MN", "Mongolia" },
-    { "MO", "Macau S.A.R." },
-    { "MT", "Malta" },
-    { "MV", "Maldives" },
-    { "MX", "Mexico" },
-    { "MY", "Malaysia" },
-    { "NG", "Nigeria" },
-    { "NI", "Nicaragua" },
-    { "NL", "Netherlands" },
-    { "NO", "Norway" },
-    { "NP", "Nepal" },
-    { "NZ", "New Zealand" },
-    { "OM", "Oman" },
-    { "PA", "Panama" },
-    { "PE", "Peru" },
-    { "PH", "Philippines" },
-    { "PK", "Islamic Republic of Pakistan" },
-    { "PL", "Poland" },
-    { "PR", "Puerto Rico" },
-    { "PT", "Portugal" },
-    { "PY", "Paraguay" },
-    { "QA", "Qatar" },
-    { "RE", "Reunion" },
-    { "RO", "Romania" },
-    { "RS", "Serbia" },
-    { "RU", "Russia" },
-    { "RW", "Rwanda" },
-    { "SA", "Saudi Arabia" },
-    { "SE", "Sweden" },
-    { "SG", "Singapore" },
-    { "SI", "Slovenia" },
-    { "SK", "Slovak" },
-    { "SN", "Senegal" },
-    { "SO", "Somalia" },
-    { "SR", "Suriname" },
-    { "SV", "El Salvador" },
-    { "SY", "Syria" },
-    { "TH", "Thailand" },
-    { "TJ", "Tajikistan" },
-    { "TM", "Turkmenistan" },
-    { "TN", "Tunisia" },
-    { "TR", "Turkey" },
-    { "TT", "Trinidad and Tobago" },
-    { "TW", "Taiwan" },
-    { "TZ", "Tanzania" },
-    { "UA", "Ukraine" },
-    { "US", "United States" },
-    { "UY", "Uruguay" },
-    { "VA", "Vatican" },
-    { "VE", "Venezuela" },
-    { "VN", "Viet Nam" },
-    { "YE", "Yemen" },
-    { "ZA", "South Africa" },
-    { "ZW", "Zimbabwe" }
-  };
-
-
-/**
- * Country code comparator function, for binary search with bsearch().
- *
- * @param ptr1 pointer to a `struct table_entry`
- * @param ptr2 pointer to a `struct table_entry`
- * @return result of strncmp()'ing the 2-digit country codes of the entries
- */
-static int
-cmp_country_code (const void *ptr1,
-                  const void *ptr2)
-{
-  const struct table_entry *cc1 = ptr1;
-  const struct table_entry *cc2 = ptr2;
-
-  return strncmp (cc1->code,
-                  cc2->code,
-                  2);
-}
-
-
-/**
- * Validates given IBAN according to the European Banking Standards.  See:
- * http://www.europeanpaymentscouncil.eu/documents/ECBS%20IBAN%20standard%20EBS204_V3.2.pdf
- *
- * @param iban the IBAN number to validate
- * @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
- */
-static int
-validate_iban (const char *iban)
-{
-  char cc[2];
-  char ibancpy[35];
-  struct table_entry cc_entry;
-  unsigned int len;
-  char *nbuf;
-  unsigned int i;
-  unsigned int j;
-  unsigned long long dividend;
-  unsigned long long remainder;
-  int nread;
-  int ret;
-
-  len = strlen (iban);
-  if (len > 34)
-  {
-    GNUNET_break_op (0);
-    return GNUNET_NO;
-  }
-  strncpy (cc, iban, 2);
-  strncpy (ibancpy, iban + 4, len - 4);
-  strncpy (ibancpy + len - 4, iban, 4);
-  ibancpy[len] = '\0';
-  cc_entry.code = cc;
-  cc_entry.english = NULL;
-  if (NULL ==
-      bsearch (&cc_entry,
-               country_table,
-               sizeof (country_table) / sizeof (struct table_entry),
-               sizeof (struct table_entry),
-               &cmp_country_code))
-  {
-    GNUNET_break_op (0);
-    return GNUNET_NO;
-  }
-  nbuf = GNUNET_malloc ((len * 2) + 1);
-  for (i=0, j=0; i < len; i++)
-  {
-    if (isalpha ((unsigned char) ibancpy[i]))
-    {
-      if (2 != snprintf(&nbuf[j],
-                        3,
-                        "%2u",
-                        (ibancpy[i] - 'A' + 10)))
-      {
-        GNUNET_free (nbuf);
-        return GNUNET_NO;
-      }
-      j += 2;
-      continue;
-    }
-    nbuf[j] = ibancpy[i];
-    j++;
-  }
-  for (j=0;'\0' != nbuf[j];j++)
-    GNUNET_assert (isdigit( (unsigned char) nbuf[j]));
-  GNUNET_assert (sizeof(dividend) >= 8);
-  remainder = 0;
-  for (i=0; i<j; i+=16)
-  {
-    if (1 !=
-        (ret = sscanf (&nbuf[i],
-                       "%16llu %n",
-                       &dividend,
-                       &nread)))
-    {
-      GNUNET_free (nbuf);
-      GNUNET_break_op (0);
-      return GNUNET_NO;
-    }
-    if (0 != remainder)
-      dividend += remainder * (pow (10, nread));
-    remainder = dividend % 97;
-  }
-  GNUNET_free (nbuf);
-  if (1 == remainder)
-    return GNUNET_YES;
-  GNUNET_break_op (0); /* checksum wrong */
-  return GNUNET_NO;
-}
-
-
-/**
- * Compute purpose for signing.
- *
- * @param sepa_name name of the account holder
- * @param iban bank account number in IBAN format
- * @param bic bank identifier
- * @param[out] wsd purpose to be signed
- */
-static void
-compute_purpose (const char *sepa_name,
-                 const char *iban,
-                 const char *bic,
-                 struct TALER_MasterWireDetailsPS *wsd)
-{
-  struct GNUNET_HashContext *hc;
-
-  wsd->purpose.size = htonl (sizeof (struct TALER_MasterWireDetailsPS));
-  wsd->purpose.purpose = htonl (TALER_SIGNATURE_MASTER_SEPA_DETAILS);
-  hc = GNUNET_CRYPTO_hash_context_start ();
-  GNUNET_CRYPTO_hash_context_read (hc,
-				   "sepa",
-				   strlen ("sepa") + 1);
-  GNUNET_CRYPTO_hash_context_read (hc,
-				   sepa_name,
-				   strlen (sepa_name) + 1);
-  GNUNET_CRYPTO_hash_context_read (hc,
-				   iban,
-				   strlen (iban) + 1);
-  GNUNET_CRYPTO_hash_context_read (hc,
-				   bic,
-				   strlen (bic) + 1);
-  GNUNET_CRYPTO_hash_context_finish (hc,
-				     &wsd->h_sepa_details);
-}
-
-
-/**
- * Verify that the signature in the @a json for /wire/sepa is valid.
- *
- * @param json json reply with the signature
- * @param master_pub public key of the exchange to verify against
- * @return #GNUNET_SYSERR if @a json is invalid,
- *         #GNUNET_NO if the method is unknown,
- *         #GNUNET_OK if the json is valid
- */
-static int
-verify_wire_sepa_signature_ok (const json_t *json,
-                               const struct TALER_MasterPublicKeyP *master_pub)
-{
-  struct TALER_MasterSignatureP exchange_sig;
-  struct TALER_MasterWireDetailsPS mp;
-  const char *name;
-  const char *iban;
-  const char *bic;
-  struct GNUNET_JSON_Specification spec[] = {
-    GNUNET_JSON_spec_fixed_auto ("sig", &exchange_sig),
-    GNUNET_JSON_spec_string ("name", &name),
-    GNUNET_JSON_spec_string ("iban", &iban),
-    GNUNET_JSON_spec_string ("bic", &bic),
-    GNUNET_JSON_spec_end()
-  };
-
-  if (NULL == master_pub)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                "Skipping signature check as master public key not given\n");
-    return GNUNET_OK;
-  }
-  if (GNUNET_OK !=
-      GNUNET_JSON_parse (json, spec,
-                         NULL, NULL))
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  compute_purpose (name,
-                   iban,
-                   bic,
-                   &mp);
-  if (GNUNET_OK !=
-      GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_SEPA_DETAILS,
-                                  &mp.purpose,
-                                  &exchange_sig.eddsa_signature,
-                                  &master_pub->eddsa_pub))
-  {
-    GNUNET_break_op (0);
-    GNUNET_JSON_parse_free (spec);
-    return GNUNET_SYSERR;
-  }
-  GNUNET_JSON_parse_free (spec);
-  return GNUNET_OK;
-}
-
-
-/**
- * Check if the given wire format JSON object is correctly formatted
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param wire the JSON wire format object
- * @param master_pub public key of the exchange to verify against
- * @param[out] emsg set to an error message, unless we return #TALER_EC_NONE;
- *             error message must be freed by the caller using GNUNET_free()
- * @return #TALER_EC_NONE if correctly formatted
- */
-static enum TALER_ErrorCode
-sepa_wire_validate (void *cls,
-                    const json_t *wire,
-                    const struct TALER_MasterPublicKeyP *master_pub,
-                    char **emsg)
-{
-  json_error_t error;
-  const char *type;
-  const char *iban;
-  const char *name;
-  const char *bic;
-
-  *emsg = NULL;
-  if (0 != json_unpack_ex
-      ((json_t *) wire,
-       &error, 0,
-       "{"
-       "s:s," /* type: sepa */
-       "s:s," /* iban: IBAN */
-       "s:s," /* name: beneficiary name */
-       "s:s" /* bic: beneficiary bank's BIC */
-       "}",
-       "type", &type,
-       "iban", &iban,
-       "name", &name,
-       "bic", &bic))
-  {
-    char *dump;
-
-    dump = json_dumps (wire, 0);
-    GNUNET_asprintf (emsg,
-                     "JSON parsing failed at %s:%u: %s (%s): %s\n",
-                     __FILE__, __LINE__,
-                     error.text,
-                     error.source,
-                     dump);
-    free (dump);
-    return TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_JSON;
-  }
-  if (0 != strcasecmp (type,
-                       "sepa"))
-  {
-    GNUNET_asprintf (emsg,
-                     "Transfer type `%s' invalid for SEPA wire plugin\n",
-                     type);
-    return TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_TYPE;
-  }
-  if (1 != validate_iban (iban))
-  {
-    GNUNET_asprintf (emsg,
-                     "IBAN `%s' invalid\n",
-                     iban);
-    return TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_ACCOUNT_NUMBER;
-  }
-  /* FIXME: don't parse again, integrate properly... */
-  if (GNUNET_OK !=
-      verify_wire_sepa_signature_ok (wire,
-                                     master_pub))
-  {
-    GNUNET_asprintf (emsg,
-                     "Signature using public key `%s' invalid\n",
-                     TALER_B2S (master_pub));
-    return TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_SIGNATURE;
-  }
-  return TALER_EC_NONE;
-}
-
-
-/**
- * Obtain wire transfer details in the plugin-specific format
- * from the configuration.
- *
- * @param cls closure
- * @param cfg configuration with details about wire accounts
- * @param account_name which section in the configuration should we parse
- * @return NULL if @a cfg fails to have valid wire details for @a account_name
- */
-static json_t *
-sepa_get_wire_details (void *cls,
-                       const struct GNUNET_CONFIGURATION_Handle *cfg,
-                       const char *account_name)
-{
-  char *sepa_wire_file;
-  json_error_t err;
-  json_t *ret;
-  char *emsg;
-
-  /* Fetch reply */
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_filename (cfg,
-                                               account_name,
-                                               "SEPA_RESPONSE_FILE",
-                                               &sepa_wire_file))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_WARNING,
-                               account_name,
-                               "SEPA_RESPONSE_FILE");
-    return NULL;
-  }
-  ret = json_load_file (sepa_wire_file,
-                        JSON_REJECT_DUPLICATES,
-                        &err);
-  if (NULL == ret)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Failed to parse JSON in %s: %s (%s:%u)\n",
-                sepa_wire_file,
-                err.text,
-                err.source,
-                err.line);
-    GNUNET_free (sepa_wire_file);
-    return NULL;
-  }
-  if (TALER_EC_NONE !=
-      sepa_wire_validate (cls,
-                          ret,
-                          NULL,
-                          &emsg))
-    {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Failed to validate SEPA data in %s: %s\n",
-                sepa_wire_file,
-                emsg);
-    GNUNET_free (emsg);
-    GNUNET_free (sepa_wire_file);
-    json_decref (ret);
-    return NULL;
-  }
-  GNUNET_free (sepa_wire_file);
-  return ret;
-}
-
-
-/**
- * Sign wire transfer details in the plugin-specific format.
- *
- * @param cls closure
- * @param in wire transfer details in JSON format
- * @param key private signing key to use
- * @param salt salt to add
- * @param[out] sig where to write the signature
- * @return #GNUNET_OK on success
- */
-static int
-sepa_sign_wire_details (void *cls,
-                        const json_t *in,
-                        const struct TALER_MasterPrivateKeyP *key,
-                        const struct GNUNET_HashCode *salt,
-                        struct TALER_MasterSignatureP *sig)
-{
-  struct TALER_MasterWireDetailsPS wsd;
-  const char *sepa_name;
-  const char *iban;
-  const char *bic;
-  const char *type;
-  json_error_t err;
-
-  if (0 !=
-      json_unpack_ex ((json_t *) in,
-                      &err,
-                      0 /* flags */,
-                      "{s:s, s:s, s:s, s:s}",
-                      "type", &type,
-                      "name", &sepa_name,
-                      "iban", &iban,
-                      "bic", &bic))
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                "Failed to unpack JSON: %s (at %u)\n",
-                err.text,
-                err.position);
-    return GNUNET_SYSERR;
-  }
-  if (0 != strcmp (type,
-                   "sepa"))
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                "`type' must be `sepa' for SEPA wire details\n");
-    return GNUNET_SYSERR;
-  }
-  if (1 != validate_iban (iban))
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                "IBAN invalid in SEPA wire details\n");
-    return GNUNET_SYSERR;
-  }
-  compute_purpose (sepa_name,
-                   iban,
-                   bic,
-                   &wsd);
-  GNUNET_CRYPTO_eddsa_sign (&key->eddsa_priv,
-			    &wsd.purpose,
-			    &sig->eddsa_signature);
-  return GNUNET_OK;
-}
-
-
-/**
- * Prepare for exeuction of a wire transfer.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param wire valid wire account information
- * @param amount amount to transfer, already rounded
- * @param exchange_base_url base URL of the exchange (for tracking)
- * @param wtid wire transfer identifier to use
- * @param psc function to call with the prepared data to persist
- * @param psc_cls closure for @a psc
- * @return NULL on failure
- */
-static struct TALER_WIRE_PrepareHandle *
-sepa_prepare_wire_transfer (void *cls,
-                            const json_t *wire,
-                            const struct TALER_Amount *amount,
-                            const char *exchange_base_url,
-                            const struct TALER_WireTransferIdentifierRawP *wtid,
-                            TALER_WIRE_PrepareTransactionCallback psc,
-                            void *psc_cls)
-{
-  GNUNET_break (0); // FIXME: not implemented
-  return NULL;
-}
-
-
-/**
- * Abort preparation of a wire transfer. For example,
- * because we are shutting down.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param pth preparation to cancel
- */
-static void
-sepa_prepare_wire_transfer_cancel (void *cls,
-                                   struct TALER_WIRE_PrepareHandle *pth)
-{
-  GNUNET_break (0); // FIXME: not implemented
-}
-
-
-/**
- * Execute a wire transfer.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param buf buffer with the prepared execution details
- * @param buf_size number of bytes in @a buf
- * @param cc function to call upon success
- * @param cc_cls closure for @a cc
- * @return NULL on error
- */
-static struct TALER_WIRE_ExecuteHandle *
-sepa_execute_wire_transfer (void *cls,
-                            const char *buf,
-                            size_t buf_size,
-                            TALER_WIRE_ConfirmationCallback cc,
-                            void *cc_cls)
-{
-  GNUNET_break (0); // FIXME: not implemented
-  return NULL;
-}
-
-
-/**
- * Abort execution of a wire transfer. For example, because we are
- * shutting down.  Note that if an execution is aborted, it may or
- * may not still succeed. The caller MUST run @e
- * execute_wire_transfer again for the same request as soon as
- * possilbe, to ensure that the request either ultimately succeeds
- * or ultimately fails. Until this has been done, the transaction is
- * in limbo (i.e. may or may not have been committed).
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param eh execution to cancel
- */
-static void
-sepa_execute_wire_transfer_cancel (void *cls,
-                                   struct TALER_WIRE_ExecuteHandle *eh)
-{
-  GNUNET_break (0); // FIXME: not implemented
-}
-
-
-/**
- * Query transfer history of an account.  We use the variable-size
- * @a start_off to indicate which transfers we are interested in as
- * different banking systems may have different ways to identify
- * transfers.  The @a start_off value must thus match the value of
- * a `row_off` argument previously given to the @a hres_cb.  Use
- * NULL to query transfers from the beginning of time (with
- * positive @a num_results) or from the latest committed transfers
- * (with negative @a num_results).
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param direction what kinds of wire transfers should be returned
- * @param start_off from which row on do we want to get results, use NULL for the latest; exclusive
- * @param start_off_len number of bytes in @a start_off; must be `sizeof(uint64_t)`.
- * @param num_results how many results do we want; negative numbers to go into the past,
- *                    positive numbers to go into the future starting at @a start_row;
- *                    must not be zero.
- * @param hres_cb the callback to call with the transaction history
- * @param hres_cb_cls closure for the above callback
- */
-static struct TALER_WIRE_HistoryHandle *
-sepa_get_history (void *cls,
-                  enum TALER_BANK_Direction direction,
-                  const void *start_off,
-                  size_t start_off_len,
-                  int64_t num_results,
-                  TALER_WIRE_HistoryResultCallback hres_cb,
-                  void *hres_cb_cls)
-{
-  GNUNET_break (0);
-  return NULL;
-}
-
-
-/**
- * Cancel going over the account's history.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param whh operation to cancel
- */
-static void
-sepa_get_history_cancel (void *cls,
-			 struct TALER_WIRE_HistoryHandle *whh)
-{
-  GNUNET_break (0);
-}
-
-
-
-/**
- * Context for a rejection operation.
- */
-struct TALER_WIRE_RejectHandle
-{
-  /**
-   * Function to call with the result.
-   */
-  TALER_WIRE_RejectTransferCallback rej_cb;
-
-  /**
-   * Closure for @e rej_cb.
-   */
-  void *rej_cb_cls;
-
-  /**
-   * Handle to task for timeout of operation.
-   */
-  struct GNUNET_SCHEDULER_Task *timeout_task;
-};
-
-
-/**
- * Rejection operation failed with timeout, notify callback
- * and clean up.
- *
- * @param cls closure with `struct TALER_WIRE_RejectHandle`
- */
-static void
-timeout_reject (void *cls)
-{
-  struct TALER_WIRE_RejectHandle *rh = cls;
-
-  rh->timeout_task = NULL;
-  rh->rej_cb (rh->rej_cb_cls,
-              TALER_EC_NOT_IMPLEMENTED /* in the future: TALER_EC_TIMEOUT */);
-  GNUNET_free (rh);
-}
-
-
-/**
- * Reject an incoming wire transfer that was obtained from the
- * history. This function can be used to transfer funds back to
- * the sender if the WTID was malformed (i.e. due to a typo).
- *
- * Calling `reject_transfer` twice on the same wire transfer should
- * be idempotent, i.e. not cause the funds to be wired back twice.
- * Furthermore, the transfer should henceforth be removed from the
- * results returned by @e get_history.
- *
- * @param cls plugin's closure
- * @param start_off offset of the wire transfer in plugin-specific format
- * @param start_off_len number of bytes in @a start_off
- * @param rej_cb function to call with the result of the operation
- * @param rej_cb_cls closure for @a rej_cb
- * @return handle to cancel the operation
- */
-static struct TALER_WIRE_RejectHandle *
-sepa_reject_transfer (void *cls,
-                      const void *start_off,
-                      size_t start_off_len,
-                      TALER_WIRE_RejectTransferCallback rej_cb,
-                      void *rej_cb_cls)
-{
-  struct TALER_WIRE_RejectHandle *rh;
-
-  GNUNET_break (0); /* not implemented, just a stub! */
-  rh = GNUNET_new (struct TALER_WIRE_RejectHandle);
-  rh->rej_cb = rej_cb;
-  rh->rej_cb_cls = rej_cb_cls;
-  rh->timeout_task = GNUNET_SCHEDULER_add_now (&timeout_reject,
-                                               rh);
-  return rh;
-}
-
-
-/**
- * Cancel ongoing reject operation.  Note that the rejection may still
- * proceed. Basically, if this function is called, the rejection may
- * have happened or not.  This function is usually used during shutdown
- * or system upgrades.  At a later point, the application must call
- * @e reject_transfer again for this wire transfer, unless the
- * @e get_history shows that the wire transfer no longer exists.
- *
- * @param cls plugins' closure
- * @param rh operation to cancel
- * @return closure of the callback of the operation
- */
-static void *
-sepa_reject_transfer_cancel (void *cls,
-                             struct TALER_WIRE_RejectHandle *rh)
-{
-  void *ret = rh->rej_cb_cls;
-
-  GNUNET_SCHEDULER_cancel (rh->timeout_task);
-  GNUNET_free (rh);
-  return ret;
-}
-
-
-/**
- * Initialize sepa-wire subsystem.
- *
- * @param cls a configuration instance
- * @return NULL on error, otherwise a `struct TALER_WIRE_Plugin`
- */
-void *
-libtaler_plugin_wire_sepa_init (void *cls)
-{
-  struct GNUNET_CONFIGURATION_Handle *cfg = cls;
-  struct SepaClosure *sc;
-  struct TALER_WIRE_Plugin *plugin;
-
-  sc = GNUNET_new (struct SepaClosure);
-  if (NULL != cfg)
-  {
-    if (GNUNET_OK !=
-        GNUNET_CONFIGURATION_get_value_string (cfg,
-                                               "taler",
-                                               "CURRENCY",
-                                               &sc->currency))
-    {
-      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                                 "taler",
-                                 "CURRENCY");
-      GNUNET_free (sc);
-      return NULL;
-    }
-  }
-  plugin = GNUNET_new (struct TALER_WIRE_Plugin);
-  plugin->cls = sc;
-  plugin->amount_round = &sepa_amount_round;
-  plugin->get_wire_details = &sepa_get_wire_details;
-  plugin->sign_wire_details = &sepa_sign_wire_details;
-  plugin->wire_validate = &sepa_wire_validate;
-  plugin->prepare_wire_transfer = &sepa_prepare_wire_transfer;
-  plugin->prepare_wire_transfer_cancel = &sepa_prepare_wire_transfer_cancel;
-  plugin->execute_wire_transfer = &sepa_execute_wire_transfer;
-  plugin->execute_wire_transfer_cancel = &sepa_execute_wire_transfer_cancel;
-  plugin->get_history = &sepa_get_history;
-  plugin->get_history_cancel = &sepa_get_history_cancel;
-  plugin->reject_transfer = &sepa_reject_transfer;
-  plugin->reject_transfer_cancel = &sepa_reject_transfer_cancel;
-  return plugin;
-}
-
-
-/**
- * Shutdown Sepa wire subsystem.
- *
- * @param cls a `struct TALER_WIRE_Plugin`
- * @return NULL (always)
- */
-void *
-libtaler_plugin_wire_sepa_done (void *cls)
-{
-  struct TALER_WIRE_Plugin *plugin = cls;
-  struct SepaClosure *sc = plugin->cls;
-
-  GNUNET_free_non_null (sc->currency);
-  GNUNET_free (sc);
-  GNUNET_free (plugin);
-  return NULL;
-}
-
-/* end of plugin_wire_sepa.c */
diff --git a/src/wire/plugin_wire_template.c b/src/wire/plugin_wire_template.c
deleted file mode 100644
index 06e70c2a8..000000000
--- a/src/wire/plugin_wire_template.c
+++ /dev/null
@@ -1,346 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2016 GNUnet e.V.
-
-  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 plugin_wire_template.c
- * @brief template for wire plugins; replace "template" with real plugin name!
- * @author Florian Dold
- * @author Christian Grothoff
- * @author Sree Harsha Totakura
- */
-#include "platform.h"
-#include "taler_wire_plugin.h"
-
-
-/**
- * Type of the "cls" argument given to each of the functions in
- * our API.
- */
-struct TemplateClosure
-{
-
-  /**
-   * URL of the bank for sending funds to the bank.
-   */
-  char *bank_url;
-
-  /**
-   * Which currency do we support?
-   */
-  char *currency;
-
-};
-
-
-/**
- * Round amount DOWN to the amount that can be transferred via the wire
- * method.  For example, Taler may support 0.000001 EUR as a unit of
- * payment, but SEPA only supports 0.01 EUR.  This function would
- * round 0.125 EUR to 0.12 EUR in this case.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param[in,out] amount amount to round down
- * @return #GNUNET_OK on success, #GNUNET_NO if rounding was unnecessary,
- *         #GNUNET_SYSERR if the amount or currency was invalid
- */
-static int
-template_amount_round (void *cls,
-                       struct TALER_Amount *amount)
-{
-  struct TemplateClosure *tc = cls;
-
-  if (0 != strcasecmp (amount->currency,
-                       tc->currency))
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  GNUNET_break (0); // not implemented
-  return GNUNET_SYSERR;
-}
-
-
-/**
- * Obtain wire transfer details in the plugin-specific format
- * from the configuration.
- *
- * @param cls closure
- * @param cfg configuration with details about wire accounts
- * @param account_name which section in the configuration should we parse
- * @return NULL if @a cfg fails to have valid wire details for @a account_name
- */
-static json_t *
-template_get_wire_details (void *cls,
-                           const struct GNUNET_CONFIGURATION_Handle *cfg,
-                           const char *account_name)
-{
-  GNUNET_break (0);
-  return NULL;
-}
-
-
-/**
- * Check if the given wire format JSON object is correctly formatted
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param wire the JSON wire format object
- * @param master_pub public key of the exchange to verify against
- * @param[out] emsg set to an error message, unless we return #TALER_EC_NONE;
- *             error message must be freed by the caller using GNUNET_free()
- * @return #TALER_EC_NONE if correctly formatted
- */
-static enum TALER_ErrorCode
-template_wire_validate (void *cls,
-                        const json_t *wire,
-                        const struct TALER_MasterPublicKeyP *master_pub,
-                        char **emsg)
-{
-  GNUNET_asprintf (emsg,
-                   "Not implemented");
-  return TALER_EC_NOT_IMPLEMENTED;
-}
-
-
-/**
- * Prepare for exeuction of a wire transfer.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param wire valid wire account information
- * @param amount amount to transfer, already rounded
- * @param exchange_base_url base URL of the exchange (for tracking)
- * @param wtid wire transfer identifier to use
- * @param ptc function to call with the prepared data to persist
- * @param ptc_cls closure for @a ptc
- * @return NULL on failure
- */
-static struct TALER_WIRE_PrepareHandle *
-template_prepare_wire_transfer (void *cls,
-                                const json_t *wire,
-                                const struct TALER_Amount *amount,
-                                const char *exchange_base_url,
-                                const struct TALER_WireTransferIdentifierRawP *wtid,
-                                TALER_WIRE_PrepareTransactionCallback ptc,
-                                void *ptc_cls)
-{
-  GNUNET_break (0);
-  return NULL;
-}
-
-
-/**
- * Abort preparation of a wire transfer. For example,
- * because we are shutting down.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param pth preparation to cancel
- */
-static void
-template_prepare_wire_transfer_cancel (void *cls,
-                                       struct TALER_WIRE_PrepareHandle *pth)
-{
-  GNUNET_break (0);
-}
-
-
-/**
- * Execute a wire transfer.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param buf buffer with the prepared execution details
- * @param buf_size number of bytes in @a buf
- * @param cc function to call upon success
- * @param cc_cls closure for @a cc
- * @return NULL on error
- */
-static struct TALER_WIRE_ExecuteHandle *
-template_execute_wire_transfer (void *cls,
-                                const char *buf,
-                                size_t buf_size,
-                                TALER_WIRE_ConfirmationCallback cc,
-                                void *cc_cls)
-{
-  GNUNET_break (0);
-  return NULL;
-}
-
-
-/**
- * Sign wire transfer details in the plugin-specific format.
- *
- * @param cls closure
- * @param in wire transfer details in JSON format
- * @param key private signing key to use
- * @param salt salt to add
- * @param[out] sig where to write the signature
- * @return #GNUNET_OK on success
- */
-static int
-template_sign_wire_details (void *cls,
-                            const json_t *in,
-                            const struct TALER_MasterPrivateKeyP *key,
-                            const struct GNUNET_HashCode *salt,
-                            struct TALER_MasterSignatureP *sig)
-{
-  GNUNET_break (0);
-  return GNUNET_SYSERR;
-}
-
-
-/**
- * Abort execution of a wire transfer. For example, because we are
- * shutting down.  Note that if an execution is aborted, it may or
- * may not still succeed. The caller MUST run @e
- * execute_wire_transfer again for the same request as soon as
- * possilbe, to ensure that the request either ultimately succeeds
- * or ultimately fails. Until this has been done, the transaction is
- * in limbo (i.e. may or may not have been committed).
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param eh execution to cancel
- */
-static void
-template_execute_wire_transfer_cancel (void *cls,
-                                       struct TALER_WIRE_ExecuteHandle *eh)
-{
-  GNUNET_break (0);
-}
-
-
-/**
- * Query transfer history of an account.  We use the variable-size
- * @a start_off to indicate which transfers we are interested in as
- * different banking systems may have different ways to identify
- * transfers.  The @a start_off value must thus match the value of
- * a `row_off` argument previously given to the @a hres_cb.  Use
- * NULL to query transfers from the beginning of time (with
- * positive @a num_results) or from the latest committed transfers
- * (with negative @a num_results).
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param direction what kinds of wire transfers should be returned
- * @param start_off from which row on do we want to get results, use NULL for the latest; exclusive
- * @param start_off_len number of bytes in @a start_off; must be `sizeof(uint64_t)`.
- * @param num_results how many results do we want; negative numbers to go into the past,
- *                    positive numbers to go into the future starting at @a start_row;
- *                    must not be zero.
- * @param hres_cb the callback to call with the transaction history
- * @param hres_cb_cls closure for the above callback
- */
-static struct TALER_WIRE_HistoryHandle *
-template_get_history (void *cls,
-                      enum TALER_BANK_Direction direction,
-                      const void *start_off,
-                      size_t start_off_len,
-                      int64_t num_results,
-                      TALER_WIRE_HistoryResultCallback hres_cb,
-                      void *hres_cb_cls)
-{
-  GNUNET_break (0);
-  return NULL;
-}
-
-
-/**
- * Cancel going over the account's history.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param whh operation to cancel
- */
-static void
-template_get_history_cancel (void *cls,
-			     struct TALER_WIRE_HistoryHandle *whh)
-{
-  GNUNET_break (0);
-}
-
-
-/**
- * Initialize template-wire subsystem.
- *
- * @param cls a configuration instance
- * @return NULL on error, otherwise a `struct TALER_WIRE_Plugin`
- */
-void *
-libtaler_plugin_wire_template_init (void *cls)
-{
-  struct GNUNET_CONFIGURATION_Handle *cfg = cls;
-  struct TemplateClosure *tc;
-  struct TALER_WIRE_Plugin *plugin;
-
-  tc = GNUNET_new (struct TemplateClosure);
-
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_string (cfg,
-                                             "exchange-wire-template",
-                                             "bank_url",
-                                             &tc->bank_url))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                               "exchange-wire-template",
-                               "bank_url");
-    GNUNET_free (tc);
-    return NULL;
-  }
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_string (cfg,
-                                             "taler",
-                                             "CURRENCY",
-                                             &tc->currency))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                               "taler",
-                               "CURRENCY");
-    GNUNET_free (tc->bank_url);
-    GNUNET_free (tc);
-    return NULL;
-  }
-
-  plugin = GNUNET_new (struct TALER_WIRE_Plugin);
-  plugin->cls = tc;
-  plugin->amount_round = &template_amount_round;
-  plugin->get_wire_details = &template_get_wire_details;
-  plugin->sign_wire_details = &template_sign_wire_details;
-  plugin->wire_validate = &template_wire_validate;
-  plugin->prepare_wire_transfer = &template_prepare_wire_transfer;
-  plugin->prepare_wire_transfer_cancel = &template_prepare_wire_transfer_cancel;
-  plugin->execute_wire_transfer = &template_execute_wire_transfer;
-  plugin->execute_wire_transfer_cancel = &template_execute_wire_transfer_cancel;
-  plugin->get_history = &template_get_history;
-  plugin->get_history_cancel = &template_get_history_cancel;
-  return plugin;
-}
-
-
-/**
- * Shutdown Template wire subsystem.
- *
- * @param cls a `struct TALER_WIRE_Plugin`
- * @return NULL (always)
- */
-void *
-libtaler_plugin_wire_template_done (void *cls)
-{
-  struct TALER_WIRE_Plugin *plugin = cls;
-  struct TemplateClosure *tc = plugin->cls;
-
-  GNUNET_free (tc->bank_url);
-  GNUNET_free (tc->currency);
-  GNUNET_free (tc);
-  GNUNET_free (plugin);
-  return NULL;
-}
-
-/* end of plugin_wire_template.c */
diff --git a/src/wire/plugin_wire_test.c b/src/wire/plugin_wire_test.c
deleted file mode 100644
index 11feaea7e..000000000
--- a/src/wire/plugin_wire_test.c
+++ /dev/null
@@ -1,1302 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2017 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 plugin_wire_test.c
- * @brief plugin for the "test" wire method
- * @author Christian Grothoff
- */
-#include "platform.h"
-#include "taler_wire_plugin.h"
-#include "taler_bank_service.h"
-#include "taler_signatures.h"
-#include <gnunet/gnunet_curl_lib.h>
-
-/* only for HTTP status codes */
-#include <microhttpd.h>
-
-/**
- * Type of the "cls" argument given to each of the functions in
- * our API.
- */
-struct TestClosure
-{
-
-  /**
-   * Which currency do we support?
-   */
-  char *currency;
-
-  /**
-   * URL of our bank.
-   */
-  char *bank_url;
-
-  /**
-   * Authentication information.
-   */
-  struct TALER_BANK_AuthenticationData auth;
-
-  /**
-   * Handle to the context for sending funds to the bank.
-   */
-  struct GNUNET_CURL_Context *ctx;
-
-  /**
-   * Scheduler context for running the @e ctx.
-   */
-  struct GNUNET_CURL_RescheduleContext *rc;
-
-  /**
-   * Number of the account that the exchange has at the bank for
-   * transfers.
-   */
-  unsigned long long exchange_account_no;
-
-};
-
-
-/**
- * Handle returned by #test_prepare_wire_transfer.
- */
-struct TALER_WIRE_PrepareHandle
-{
-
-  /**
-   * Task we use for async execution.
-   */
-  struct GNUNET_SCHEDULER_Task *task;
-
-  /**
-   * Test closure we run in.
-   */
-  struct TestClosure *tc;
-
-  /**
-   * Wire data for the transfer.
-   */
-  json_t *wire;
-
-  /**
-   * Base URL to use for the exchange.
-   */
-  char *exchange_base_url;
-
-  /**
-   * Function to call with the serialized data.
-   */
-  TALER_WIRE_PrepareTransactionCallback ptc;
-
-  /**
-   * Closure for @e ptc.
-   */
-  void *ptc_cls;
-
-  /**
-   * Amount to transfer.
-   */
-  struct TALER_Amount amount;
-
-  /**
-   * Subject of the wire transfer.
-   */
-  struct TALER_WireTransferIdentifierRawP wtid;
-
-
-};
-
-
-/**
- * Handle returned by #test_execute_wire_transfer.
- */
-struct TALER_WIRE_ExecuteHandle
-{
-
-  /**
-   * Handle to the HTTP request to the bank.
-   */
-  struct TALER_BANK_AdminAddIncomingHandle *aaih;
-
-  /**
-   * Function to call with the result.
-   */
-  TALER_WIRE_ConfirmationCallback cc;
-
-  /**
-   * Closure for @e cc.
-   */
-  void *cc_cls;
-};
-
-
-
-/**
- * Round amount DOWN to the amount that can be transferred via the wire
- * method.  For example, Taler may support 0.000001 EUR as a unit of
- * payment, but SEPA only supports 0.01 EUR.  This function would
- * round 0.125 EUR to 0.12 EUR in this case.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param[in,out] amount amount to round down
- * @return #GNUNET_OK on success, #GNUNET_NO if rounding was unnecessary,
- *         #GNUNET_SYSERR if the amount or currency was invalid
- */
-static int
-test_amount_round (void *cls,
-                   struct TALER_Amount *amount)
-{
-  struct TestClosure *tc = cls;
-  uint32_t delta;
-
-  if (NULL == tc->currency)
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                               "taler",
-                               "CURRENCY");
-    return GNUNET_SYSERR; /* not configured with currency */
-  }
-  if (0 != strcasecmp (amount->currency,
-                       tc->currency))
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  /* 'test' method supports 1/100 of the unit currency, i.e. 0.01 CUR */
-  delta = amount->fraction % (TALER_AMOUNT_FRAC_BASE / 100);
-  if (0 == delta)
-    return GNUNET_NO;
-  amount->fraction -= delta;
-  return GNUNET_OK;
-}
-
-
-/**
- * Compute purpose for signing.
- *
- * @param account number of the account
- * @param bank_url URL of the bank
- * @param[out] wsd purpose to be signed
- */
-static void
-compute_purpose (uint64_t account,
-                 const char *bank_url,
-                 struct TALER_MasterWireDetailsPS *wsd)
-{
-  struct GNUNET_HashContext *hc;
-  uint64_t n = GNUNET_htonll (account);
-
-  wsd->purpose.size = htonl (sizeof (struct TALER_MasterWireDetailsPS));
-  wsd->purpose.purpose = htonl (TALER_SIGNATURE_MASTER_TEST_DETAILS);
-  hc = GNUNET_CRYPTO_hash_context_start ();
-  GNUNET_CRYPTO_hash_context_read (hc,
-				   "test",
-				   strlen ("test") + 1);
-  GNUNET_CRYPTO_hash_context_read (hc,
-				   &n,
-                                   sizeof (n));
-  GNUNET_CRYPTO_hash_context_read (hc,
-				   bank_url,
-				   strlen (bank_url) + 1);
-  GNUNET_CRYPTO_hash_context_finish (hc,
-				     &wsd->h_sepa_details);
-}
-
-
-/**
- * Check if the given wire format JSON object is correctly formatted.
- * Right now, the only thing we require is a field
- * "account_number" which must contain a positive 53-bit integer.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param wire the JSON wire format object
- * @param master_pub public key of the exchange to verify against
- * @param[out] emsg set to an error message, unless we return #TALER_EC_NONE;
- *             error message must be freed by the caller using GNUNET_free()
- * @return #TALER_EC_NONE if correctly formatted
- */
-static enum TALER_ErrorCode
-test_wire_validate (void *cls,
-                    const json_t *wire,
-                    const struct TALER_MasterPublicKeyP *master_pub,
-                    char **emsg)
-{
-  struct TestClosure *tc = cls;
-  json_error_t error;
-  json_int_t account_no;
-  const char *bank_url;
-  const char *sig_s;
-  struct TALER_MasterWireDetailsPS wsd;
-  struct TALER_MasterSignatureP sig;
-
-  *emsg = NULL;
-  if (0 !=
-      json_unpack_ex ((json_t *) wire,
-		      &error,
-		      0,
-		      "{s:I, s:s}",
-		      "account_number", &account_no,
-                      "bank_url", &bank_url))
-  {
-    char *dump;
-
-    dump = json_dumps (wire, 0);
-    GNUNET_asprintf (emsg,
-                     "JSON parsing failed at %s:%u: %s (%s): %s\n",
-                     __FILE__, __LINE__,
-                     error.text,
-                     error.source,
-                     dump);
-    free (dump);
-    return TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_JSON;
-  }
-  if ( (account_no < 0) ||
-       (account_no > (1LL << 53)) )
-  {
-    GNUNET_asprintf (emsg,
-                     "Account number %llu outside of permitted range\n",
-                     account_no);
-    return TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_ACCOUNT_NUMBER;
-  }
-  if ( (NULL != tc->bank_url) &&
-       (0 != strcmp (bank_url,
-                     tc->bank_url)) )
-  {
-    GNUNET_asprintf (emsg,
-                     "Wire specifies bank URL `%s', but this exchange only supports `%s'\n",
-                     bank_url,
-                     tc->bank_url);
-    return TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_BANK;
-  }
-  if (NULL == master_pub)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                "Skipping signature check as master public key not given\n");
-    return TALER_EC_NONE;
-  }
-  if (0 !=
-      json_unpack_ex ((json_t *) wire,
-		      &error,
-		      0,
-		      "{s:s}",
-                      "sig", &sig_s))
-  {
-    GNUNET_asprintf (emsg,
-                     "Signature check required, but signature is missing\n");
-    return TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_SIGNATURE;
-  }
-  compute_purpose (account_no,
-                   bank_url,
-                   &wsd);
-  if (GNUNET_OK !=
-      GNUNET_STRINGS_string_to_data (sig_s,
-                                     strlen (sig_s),
-                                     &sig,
-                                     sizeof (sig)))
-  {
-    GNUNET_break (0);
-    return TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_SIGNATURE;
-  }
-  if (GNUNET_OK !=
-      GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_TEST_DETAILS,
-                                  &wsd.purpose,
-                                  &sig.eddsa_signature,
-                                  &master_pub->eddsa_pub))
-  {
-    GNUNET_asprintf (emsg,
-                     "Signature using public key `%s' invalid\n",
-                     TALER_B2S (master_pub));
-    return TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_SIGNATURE;
-  }
-  return TALER_EC_NONE;
-}
-
-
-/**
- * Obtain wire transfer details in the plugin-specific format
- * from the configuration.
- *
- * @param cls closure
- * @param cfg configuration with details about wire accounts
- * @param account_name which section in the configuration should we parse
- * @return NULL if @a cfg fails to have valid wire details for @a account_name
- */
-static json_t *
-test_get_wire_details (void *cls,
-                       const struct GNUNET_CONFIGURATION_Handle *cfg,
-                       const char *account_name)
-{
-  struct TestClosure *tc = cls;
-  char *test_wire_file;
-  json_error_t err;
-  json_t *ret;
-  char *emsg;
-
-  /* Fetch reply */
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_filename (cfg,
-                                               account_name,
-                                               "TEST_RESPONSE_FILE",
-                                               &test_wire_file))
-  {
-    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                               account_name,
-                               "TEST_RESPONSE_FILE");
-    return NULL;
-  }
-  ret = json_load_file (test_wire_file,
-                        JSON_REJECT_DUPLICATES,
-                        &err);
-  if (NULL == ret)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Failed to parse JSON in %s: %s (%s:%u)\n",
-                test_wire_file,
-                err.text,
-                err.source,
-                err.line);
-    GNUNET_free (test_wire_file);
-    return NULL;
-  }
-  if (TALER_EC_NONE !=
-      test_wire_validate (tc,
-                          ret,
-                          NULL,
-                          &emsg))
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Failed to validate TEST wire data in %s: %s\n",
-                test_wire_file,
-                emsg);
-    GNUNET_free (emsg);
-    GNUNET_free (test_wire_file);
-    json_decref (ret);
-    return NULL;
-  }
-  GNUNET_free (test_wire_file);
-  return ret;
-}
-
-
-GNUNET_NETWORK_STRUCT_BEGIN
-/**
- * Format we used for serialized transaction data.
- */
-struct BufFormatP
-{
-
-  /**
-   * The wire transfer identifier.
-   */
-  struct TALER_WireTransferIdentifierRawP wtid;
-
-  /**
-   * The amount.
-   */
-  struct TALER_AmountNBO amount;
-
-  /* followed by serialized 'wire' JSON data (0-terminated) */
-
-  /* followed by 0-terminated base URL */
-
-};
-GNUNET_NETWORK_STRUCT_END
-
-
-/**
- * Abort preparation of a wire transfer. For example,
- * because we are shutting down.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param pth preparation to cancel
- */
-static void
-test_prepare_wire_transfer_cancel (void *cls,
-                                   struct TALER_WIRE_PrepareHandle *pth)
-{
-  if (NULL != pth->task)
-    GNUNET_SCHEDULER_cancel (pth->task);
-  json_decref (pth->wire);
-  GNUNET_free (pth->exchange_base_url);
-  GNUNET_free (pth);
-}
-
-
-/**
- * Prepare for exeuction of a wire transfer.  Calls the
- * callback with the serialized state.
- *
- * @param cls the `struct TALER_WIRE_PrepareHandle`
- */
-static void
-do_prepare (void *cls)
-{
-  struct TALER_WIRE_PrepareHandle *pth = cls;
-  char *wire_enc;
-  size_t len_w;
-  size_t len_b;
-  struct BufFormatP bf;
-
-  pth->task = NULL;
-  /* serialize the state into a 'buf' */
-  wire_enc = json_dumps (pth->wire,
-                         JSON_COMPACT | JSON_SORT_KEYS);
-  if (NULL == wire_enc)
-  {
-    GNUNET_break (0);
-    pth->ptc (pth->ptc_cls,
-              NULL,
-              0);
-    test_prepare_wire_transfer_cancel (NULL,
-                                       pth);
-    return;
-  }
-  len_w = strlen (wire_enc) + 1;
-  len_b = strlen (pth->exchange_base_url) + 1;
-  bf.wtid = pth->wtid;
-  TALER_amount_hton (&bf.amount,
-                     &pth->amount);
-  {
-    char buf[sizeof (struct BufFormatP) + len_w + len_b];
-
-    memcpy (buf,
-            &bf,
-            sizeof (struct BufFormatP));
-    memcpy (&buf[sizeof (struct BufFormatP)],
-            wire_enc,
-            len_w);
-    memcpy (&buf[sizeof (struct BufFormatP) + len_w],
-            pth->exchange_base_url,
-            len_b);
-
-    /* finally give the state back */
-    pth->ptc (pth->ptc_cls,
-              buf,
-              sizeof (buf));
-  }
-  free (wire_enc); /* not using GNUNET_free(),
-                      as this one is allocated by libjansson */
-  test_prepare_wire_transfer_cancel (NULL,
-                                     pth);
-}
-
-
-/**
- * Prepare for exeuction of a wire transfer.  Note that we should call
- * @a ptc asynchronously (as that is what the API requires, because
- * some transfer methods need it).  So while we could immediately call
- * @a ptc, we first bundle up all the data and schedule a task to do
- * the work.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param wire valid wire account information
- * @param amount amount to transfer, already rounded
- * @param exchange_base_url base URL of this exchange
- * @param wtid wire transfer identifier to use
- * @param ptc function to call with the prepared data to persist
- * @param ptc_cls closure for @a ptc
- * @return NULL on failure
- */
-static struct TALER_WIRE_PrepareHandle *
-test_prepare_wire_transfer (void *cls,
-                            const json_t *wire,
-                            const struct TALER_Amount *amount,
-                            const char *exchange_base_url,
-                            const struct TALER_WireTransferIdentifierRawP *wtid,
-                            TALER_WIRE_PrepareTransactionCallback ptc,
-                            void *ptc_cls)
-{
-  struct TestClosure *tc = cls;
-  struct TALER_WIRE_PrepareHandle *pth;
-  char *emsg;
-
-  if (TALER_EC_NONE !=
-      test_wire_validate (tc,
-                          wire,
-                          NULL,
-                          &emsg))
-  {
-    GNUNET_break_op (0);
-    GNUNET_free (emsg);
-    return NULL;
-  }
-  pth = GNUNET_new (struct TALER_WIRE_PrepareHandle);
-  pth->tc = tc;
-  pth->wire = json_incref ((json_t *) wire);
-  pth->exchange_base_url = GNUNET_strdup (exchange_base_url);
-  pth->wtid = *wtid;
-  pth->ptc = ptc;
-  pth->ptc_cls = ptc_cls;
-  pth->amount = *amount;
-  pth->task = GNUNET_SCHEDULER_add_now (&do_prepare,
-                                        pth);
-  return pth;
-}
-
-
-/**
- * Called with the result of submitting information about an incoming
- * transaction to a bank.
- *
- * @param cls closure with the `struct TALER_WIRE_ExecuteHandle`
- * @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request
- *                    0 if the bank's reply is bogus (fails to follow the protocol)
- * @param ec error code from the bank
- * @param serial_id unique ID of the wire transfer in the bank's records; UINT64_MAX on error
- * @param json detailed response from the HTTPD, or NULL if reply was not JSON
- */
-static void
-execute_cb (void *cls,
-            unsigned int http_status,
-            enum TALER_ErrorCode ec,
-            uint64_t serial_id,
-            const json_t *json)
-{
-  struct TALER_WIRE_ExecuteHandle *eh = cls;
-  json_t *reason;
-  const char *emsg;
-  char *s;
-
-  eh->aaih = NULL;
-  emsg = NULL;
-  if (NULL != json)
-  {
-    reason = json_object_get (json,
-                              "reason");
-    if (NULL != reason)
-      emsg = json_string_value (reason);
-  }
-  if (NULL != emsg)
-    GNUNET_asprintf (&s,
-                     "%u/%u (%s)",
-                     http_status,
-                     (unsigned int) ec,
-                     emsg);
-  else
-    GNUNET_asprintf (&s,
-                     "%u/%u",
-                     http_status,
-                     (unsigned int) ec);
-  eh->cc (eh->cc_cls,
-          (MHD_HTTP_OK == http_status) ? GNUNET_OK : GNUNET_SYSERR,
-          serial_id,
-          (MHD_HTTP_OK == http_status) ? NULL : s);
-  GNUNET_free (s);
-  GNUNET_free (eh);
-}
-
-
-/**
- * Sign wire transfer details in the plugin-specific format.
- *
- * @param cls closure
- * @param in wire transfer details in JSON format
- * @param key private signing key to use
- * @param salt salt to add
- * @param[out] sig where to write the signature
- * @return #GNUNET_OK on success
- */
-static int
-test_sign_wire_details (void *cls,
-                        const json_t *in,
-                        const struct TALER_MasterPrivateKeyP *key,
-                        const struct GNUNET_HashCode *salt,
-                        struct TALER_MasterSignatureP *sig)
-{
-  struct TALER_MasterWireDetailsPS wsd;
-  const char *bank_url;
-  const char *type;
-  json_int_t account;
-  json_error_t err;
-
-  if (0 !=
-      json_unpack_ex ((json_t *) in,
-                      &err,
-                      0 /* flags */,
-                      "{s:s, s:s, s:I}",
-                      "type", &type,
-                      "bank_url", &bank_url,
-                      "account_number", &account))
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                "Failed to unpack JSON: %s (at %u)\n",
-                err.text,
-                err.position);
-    return GNUNET_SYSERR;
-  }
-  if (0 != strcmp (type,
-                   "test"))
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                "`type' must be `test' for test wire details\n");
-    return GNUNET_SYSERR;
-  }
-  compute_purpose (account,
-                   bank_url,
-                   &wsd);
-  GNUNET_CRYPTO_eddsa_sign (&key->eddsa_priv,
-			    &wsd.purpose,
-			    &sig->eddsa_signature);
-  return GNUNET_OK;
-}
-
-
-/**
- * Execute a wire transfer.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param buf buffer with the prepared execution details
- * @param buf_size number of bytes in @a buf
- * @param cc function to call upon success
- * @param cc_cls closure for @a cc
- * @return NULL on error
- */
-static struct TALER_WIRE_ExecuteHandle *
-test_execute_wire_transfer (void *cls,
-                            const char *buf,
-                            size_t buf_size,
-                            TALER_WIRE_ConfirmationCallback cc,
-                            void *cc_cls)
-{
-  struct TestClosure *tc = cls;
-  struct TALER_WIRE_ExecuteHandle *eh;
-  json_t *wire;
-  json_error_t error;
-  struct TALER_Amount amount;
-  json_int_t account_no;
-  struct BufFormatP bf;
-  char *emsg;
-  const char *json_s;
-  const char *exchange_base_url;
-  char *wire_s;
-
-  if (NULL == tc->ctx)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Bank not initialized, cannot do transfers!\n");
-    return NULL; /* not initialized with configuration, cannot do transfers */
-  }
-  if ( (buf_size <= sizeof (struct BufFormatP)) ||
-       ('\0' != buf[buf_size - 1]) )
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-  json_s = &buf[sizeof (struct BufFormatP)];
-  exchange_base_url = &json_s[strlen (json_s) + 1];
-  if (exchange_base_url > &buf[buf_size - 1])
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-  memcpy (&bf,
-          buf,
-          sizeof (bf));
-  TALER_amount_ntoh (&amount,
-                     &bf.amount);
-  wire = json_loads (json_s,
-                     JSON_REJECT_DUPLICATES,
-                     NULL);
-  if (NULL == wire)
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-  GNUNET_assert (TALER_EC_NONE ==
-                 test_wire_validate (tc,
-                                     wire,
-                                     NULL,
-                                     &emsg));
-  if (0 !=
-      json_unpack_ex (wire,
-		      &error,
-		      0,
-		      "{s:I}",
-		      "account_number", &account_no))
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-
-  eh = GNUNET_new (struct TALER_WIRE_ExecuteHandle);
-  eh->cc = cc;
-  eh->cc_cls = cc_cls;
-  wire_s = GNUNET_STRINGS_data_to_string_alloc (&bf.wtid,
-                                                sizeof (bf.wtid));
-  eh->aaih = TALER_BANK_admin_add_incoming (tc->ctx,
-                                            tc->bank_url,
-                                            &tc->auth,
-                                            exchange_base_url,
-                                            wire_s,
-                                            &amount,
-                                            (uint64_t) tc->exchange_account_no,
-					    (uint64_t) account_no,
-                                            &execute_cb,
-                                            eh);
-  GNUNET_free (wire_s);
-  json_decref (wire);
-  if (NULL == eh->aaih)
-  {
-    GNUNET_break (0);
-    GNUNET_free (eh);
-    return NULL;
-  }
-  return eh;
-}
-
-
-/**
- * Abort execution of a wire transfer. For example, because we are
- * shutting down.  Note that if an execution is aborted, it may or
- * may not still succeed. The caller MUST run @e
- * execute_wire_transfer again for the same request as soon as
- * possilbe, to ensure that the request either ultimately succeeds
- * or ultimately fails. Until this has been done, the transaction is
- * in limbo (i.e. may or may not have been committed).
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param eh execution to cancel
- */
-static void
-test_execute_wire_transfer_cancel (void *cls,
-                                   struct TALER_WIRE_ExecuteHandle *eh)
-{
-  TALER_BANK_admin_add_incoming_cancel (eh->aaih);
-  GNUNET_free (eh);
-}
-
-
-/**
- * Handle for a #test_get_history() request.
- */
-struct TALER_WIRE_HistoryHandle
-{
-
-  /**
-   * Function to call with results.
-   */
-  TALER_WIRE_HistoryResultCallback hres_cb;
-
-  /**
-   * Closure for @e hres_cb.
-   */
-  void *hres_cb_cls;
-
-  /**
-   * Request to the bank.
-   */
-  struct TALER_BANK_HistoryHandle *hh;
-
-};
-
-
-/**
- * Function called with results from the bank about the transaction history.
- *
- * @param cls the `struct TALER_WIRE_HistoryHandle`
- * @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request
- *                    0 if the bank's reply is bogus (fails to follow the protocol),
- *                    #MHD_HTTP_NO_CONTENT if there are no more results; on success the
- *                    last callback is always of this status (even if `abs(num_results)` were
- *                    already returned).
- * @param ec taler error code
- * @param dir direction of the transfer
- * @param serial_id monotonically increasing counter corresponding to the transaction
- * @param details details about the wire transfer
- * @param json detailed response from the HTTPD, or NULL if reply was not in JSON
- */
-static void
-bhist_cb (void *cls,
-          unsigned int http_status,
-          enum TALER_ErrorCode ec,
-          enum TALER_BANK_Direction dir,
-          uint64_t serial_id,
-          const struct TALER_BANK_TransferDetails *details,
-          const json_t *json)
-{
-  struct TALER_WIRE_HistoryHandle *whh = cls;
-  uint64_t bserial_id = GNUNET_htonll (serial_id);
-  struct TALER_WIRE_TransferDetails wd;
-
-  switch (http_status) {
-  case MHD_HTTP_OK:
-    {
-      char *subject;
-      char *space;
-
-      wd.amount = details->amount;
-      wd.execution_date = details->execution_date;
-      subject = GNUNET_strdup (details->wire_transfer_subject);
-      space = strchr (subject, (int) ' ');
-      if (NULL != space)
-      {
-        /* Space separates the actual wire transfer subject from the
-           exchange base URL (if present, expected only for outgoing
-           transactions).  So we cut the string off at the space. */
-        *space = '\0';
-      }
-      /* NOTE: For a real bank, the subject should include a checksum! */
-      if (GNUNET_OK !=
-          GNUNET_STRINGS_string_to_data (subject,
-                                         strlen (subject),
-                                         &wd.wtid,
-                                         sizeof (wd.wtid)))
-      {
-        /* Ill-formed wire subject, set binary version to all zeros
-           and pass as a string, this time including the part after
-           the space. */
-        memset (&wd.wtid,
-                0,
-                sizeof (wd.wtid));
-        wd.wtid_s = details->wire_transfer_subject;
-      }
-      else
-      {
-        wd.wtid_s = NULL;
-      }
-      GNUNET_free (subject);
-      wd.account_details = details->account_details;
-
-      if ( (NULL != whh->hres_cb) &&
-           (GNUNET_OK !=
-            whh->hres_cb (whh->hres_cb_cls,
-                          TALER_EC_NONE,
-                          dir,
-                          &bserial_id,
-                          sizeof (bserial_id),
-                          &wd)) )
-        whh->hres_cb = NULL;
-      break;
-    }
-  case MHD_HTTP_NO_CONTENT:
-    if (NULL != whh->hres_cb)
-      (void) whh->hres_cb (whh->hres_cb_cls,
-                           ec,
-                           TALER_BANK_DIRECTION_NONE,
-                           NULL,
-                           0,
-                           NULL);
-    GNUNET_free (whh);
-    break;
-  default:
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Bank failed with HTTP status %u (EC: %u)\n",
-                http_status,
-                ec);
-    if (NULL != whh->hres_cb)
-      (void) whh->hres_cb (whh->hres_cb_cls,
-                           ec,
-                           TALER_BANK_DIRECTION_NONE,
-                           NULL,
-                           0,
-                           NULL);
-    GNUNET_free (whh);
-    break;
-  }
-}
-
-
-/**
- * Query transfer history of an account.  We use the variable-size
- * @a start_off to indicate which transfers we are interested in as
- * different banking systems may have different ways to identify
- * transfers.  The @a start_off value must thus match the value of
- * a `row_off` argument previously given to the @a hres_cb.  Use
- * NULL to query transfers from the beginning of time (with
- * positive @a num_results) or from the latest committed transfers
- * (with negative @a num_results).
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param direction what kinds of wire transfers should be returned
- * @param start_off from which row on do we want to get results, use NULL for the latest; exclusive
- * @param start_off_len number of bytes in @a start_off; must be `sizeof(uint64_t)`.
- * @param num_results how many results do we want; negative numbers to go into the past,
- *                    positive numbers to go into the future starting at @a start_row;
- *                    must not be zero.
- * @param hres_cb the callback to call with the transaction history
- * @param hres_cb_cls closure for the above callback
- */
-static struct TALER_WIRE_HistoryHandle *
-test_get_history (void *cls,
-                  enum TALER_BANK_Direction direction,
-                  const void *start_off,
-                  size_t start_off_len,
-                  int64_t num_results,
-                  TALER_WIRE_HistoryResultCallback hres_cb,
-                  void *hres_cb_cls)
-{
-  struct TestClosure *tc = cls;
-  struct TALER_WIRE_HistoryHandle *whh;
-  const uint64_t *start_off_b64;
-  uint64_t start_row;
-
-  if (0 == num_results)
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-  if (TALER_BANK_DIRECTION_NONE == direction)
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-  if ( (NULL != start_off) &&
-       (sizeof (uint64_t) != start_off_len) )
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Wire plugin 'test' got start offset of wrong size (%llu instead of %llu)\n",
-                (unsigned long long) start_off_len, (unsigned long long) sizeof (uint64_t));
-    GNUNET_break (0);
-    /* Probably something is wrong with the DB, some other component
-     * wrote a wrong value to it.  Instead of completely stopping to work, 
-     * we just scan from the beginning. */
-    start_off = NULL;
-  }
-  if (NULL == start_off)
-  {
-    start_row = UINT64_MAX; /* no start row */
-  }
-  else
-  {
-    start_off_b64 = start_off;
-    start_row = GNUNET_ntohll (*start_off_b64);
-  }
-
-  whh = GNUNET_new (struct TALER_WIRE_HistoryHandle);
-  whh->hres_cb = hres_cb;
-  whh->hres_cb_cls = hres_cb_cls;
-  whh->hh = TALER_BANK_history (tc->ctx,
-                                tc->bank_url,
-                                &tc->auth,
-                                (uint64_t) tc->exchange_account_no,
-                                direction,
-                                start_row,
-                                num_results,
-                                &bhist_cb,
-                                whh);
-  if (NULL == whh->hh)
-  {
-    GNUNET_break (0);
-    GNUNET_free (whh);
-    return NULL;
-  }
-
-  return whh;
-}
-
-
-/**
- * Cancel going over the account's history.
- *
- * @param cls the @e cls of this struct with the plugin-specific state
- * @param whh operation to cancel
- */
-static void
-test_get_history_cancel (void *cls,
-			 struct TALER_WIRE_HistoryHandle *whh)
-{
-  TALER_BANK_history_cancel (whh->hh);
-  GNUNET_free (whh);
-}
-
-
-/**
- * Context for a rejection operation.
- */
-struct TALER_WIRE_RejectHandle
-{
-  /**
-   * Function to call with the result.
-   */
-  TALER_WIRE_RejectTransferCallback rej_cb;
-
-  /**
-   * Closure for @e rej_cb.
-   */
-  void *rej_cb_cls;
-
-  /**
-   * Handle for the reject operation.
-   */
-  struct TALER_BANK_RejectHandle *brh;
-};
-
-
-/**
- * Callbacks of this type are used to serve the result of asking
- * the bank to reject an incoming wire transfer.
- *
- * @param cls closure
- * @param http_status HTTP response code, #MHD_HTTP_NO_CONTENT (204) for successful status request;
- *                    #MHD_HTTP_NOT_FOUND if the rowid is unknown;
- *                    0 if the bank's reply is bogus (fails to follow the protocol),
- * @param ec detailed error code
- */
-static void
-reject_cb (void *cls,
-           unsigned int http_status,
-           enum TALER_ErrorCode ec)
-{
-  struct TALER_WIRE_RejectHandle *rh = cls;
-
-  rh->brh = NULL;
-  rh->rej_cb (rh->rej_cb_cls,
-              ec);
-  GNUNET_free (rh);
-}
-
-
-/**
- * Reject an incoming wire transfer that was obtained from the
- * history. This function can be used to transfer funds back to
- * the sender if the WTID was malformed (i.e. due to a typo).
- *
- * Calling `reject_transfer` twice on the same wire transfer should
- * be idempotent, i.e. not cause the funds to be wired back twice.
- * Furthermore, the transfer should henceforth be removed from the
- * results returned by @e get_history.
- *
- * @param cls plugin's closure
- * @param start_off offset of the wire transfer in plugin-specific format
- * @param start_off_len number of bytes in @a start_off
- * @param rej_cb function to call with the result of the operation
- * @param rej_cb_cls closure for @a rej_cb
- * @return handle to cancel the operation
- */
-static struct TALER_WIRE_RejectHandle *
-test_reject_transfer (void *cls,
-                      const void *start_off,
-                      size_t start_off_len,
-                      TALER_WIRE_RejectTransferCallback rej_cb,
-                      void *rej_cb_cls)
-{
-  struct TestClosure *tc = cls;
-  const uint64_t *rowid_b64 = start_off;
-  struct TALER_WIRE_RejectHandle *rh;
-
-  if (sizeof (uint64_t) != start_off_len)
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-  rh = GNUNET_new (struct TALER_WIRE_RejectHandle);
-  rh->rej_cb = rej_cb;
-  rh->rej_cb_cls = rej_cb_cls;
-  rh->brh = TALER_BANK_reject (tc->ctx,
-                               tc->bank_url,
-                               &tc->auth,
-                               (uint64_t) tc->exchange_account_no,
-                               GNUNET_ntohll (*rowid_b64),
-                               &reject_cb,
-                               rh);
-  if (NULL == rh->brh)
-  {
-    GNUNET_free (rh);
-    return NULL;
-  }
-  return rh;
-}
-
-
-/**
- * Cancel ongoing reject operation.  Note that the rejection may still
- * proceed. Basically, if this function is called, the rejection may
- * have happened or not.  This function is usually used during shutdown
- * or system upgrades.  At a later point, the application must call
- * @e reject_transfer again for this wire transfer, unless the
- * @e get_history shows that the wire transfer no longer exists.
- *
- * @param cls plugins' closure
- * @param rh operation to cancel
- * @return closure of the callback of the operation
- */
-static void *
-test_reject_transfer_cancel (void *cls,
-                             struct TALER_WIRE_RejectHandle *rh)
-{
-  void *ret = rh->rej_cb_cls;
-
-  if (NULL != rh->brh)
-    TALER_BANK_reject_cancel (rh->brh);
-  GNUNET_free (rh);
-  return ret;
-}
-
-
-/**
- * Initialize test-wire subsystem.
- *
- * @param cls a configuration instance
- * @return NULL on error, otherwise a `struct TALER_WIRE_Plugin`
- */
-void *
-libtaler_plugin_wire_test_init (void *cls)
-{
-  struct GNUNET_CONFIGURATION_Handle *cfg = cls;
-  struct TestClosure *tc;
-  struct TALER_WIRE_Plugin *plugin;
-  char *user;
-  char *pass;
-
-  tc = GNUNET_new (struct TestClosure);
-  if (NULL != cfg)
-  {
-    if (GNUNET_OK !=
-        GNUNET_CONFIGURATION_get_value_string (cfg,
-                                               "exchange-wire-test",
-                                               "BANK_URL",
-                                               &tc->bank_url))
-    {
-      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                                 "exchange-wire-test",
-                                 "BANK_URL");
-      GNUNET_free (tc);
-      return NULL;
-    }
-    if (GNUNET_OK !=
-        GNUNET_CONFIGURATION_get_value_number (cfg,
-                                               "exchange-wire-test",
-                                               "EXCHANGE_ACCOUNT_NUMBER",
-                                               &tc->exchange_account_no))
-    {
-      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                                 "exchange-wire-test",
-                                 "EXCHANGE_ACCOUNT_NUMBER");
-      GNUNET_free (tc->bank_url);
-      GNUNET_free (tc);
-      return NULL;
-    }
-    if (GNUNET_OK !=
-        GNUNET_CONFIGURATION_get_value_string (cfg,
-                                               "taler",
-                                               "CURRENCY",
-                                               &tc->currency))
-    {
-      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                                 "taler",
-                                 "CURRENCY");
-      GNUNET_free (tc->bank_url);
-      GNUNET_free (tc);
-      return NULL;
-    }
-    if (GNUNET_OK !=
-        GNUNET_CONFIGURATION_get_value_string (cfg,
-                                               "exchange-wire-test",
-                                               "USERNAME",
-                                               &user))
-    {
-      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                                 "exchange-wire-test",
-                                 "USERNAME");
-      GNUNET_free (tc->bank_url);
-      GNUNET_free (tc);
-      return NULL;
-    }
-    if (GNUNET_OK !=
-        GNUNET_CONFIGURATION_get_value_string (cfg,
-                                               "exchange-wire-test",
-                                               "PASSWORD",
-                                               &pass))
-    {
-      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
-                                 "exchange-wire-test",
-                                 "PASSWORD");
-      GNUNET_free (tc->bank_url);
-      GNUNET_free (tc);
-      GNUNET_free (user);
-      return NULL;
-    }
-    tc->auth.method = TALER_BANK_AUTH_BASIC;
-    tc->auth.details.basic.username = user;
-    tc->auth.details.basic.password = pass;
-    tc->ctx = GNUNET_CURL_init (&GNUNET_CURL_gnunet_scheduler_reschedule,
-                                &tc->rc);
-    tc->rc = GNUNET_CURL_gnunet_rc_create (tc->ctx);
-    if (NULL == tc->ctx)
-    {
-      GNUNET_break (0);
-      GNUNET_free (tc->currency);
-      GNUNET_free (tc->bank_url);
-      GNUNET_free (tc->auth.details.basic.username);
-      GNUNET_free (tc->auth.details.basic.password);
-      GNUNET_free (tc);
-      return NULL;
-    }
-  }
-  plugin = GNUNET_new (struct TALER_WIRE_Plugin);
-  plugin->cls = tc;
-  plugin->amount_round = &test_amount_round;
-  plugin->get_wire_details = &test_get_wire_details;
-  plugin->sign_wire_details = &test_sign_wire_details;
-  plugin->wire_validate = &test_wire_validate;
-  plugin->prepare_wire_transfer = &test_prepare_wire_transfer;
-  plugin->prepare_wire_transfer_cancel = &test_prepare_wire_transfer_cancel;
-  plugin->execute_wire_transfer = &test_execute_wire_transfer;
-  plugin->execute_wire_transfer_cancel = &test_execute_wire_transfer_cancel;
-  plugin->get_history = &test_get_history;
-  plugin->get_history_cancel = &test_get_history_cancel;
-  plugin->reject_transfer = &test_reject_transfer;
-  plugin->reject_transfer_cancel = &test_reject_transfer_cancel;
-  return plugin;
-}
-
-
-/**
- * Shutdown Test wire subsystem.
- *
- * @param cls a `struct TALER_WIRE_Plugin`
- * @return NULL (always)
- */
-void *
-libtaler_plugin_wire_test_done (void *cls)
-{
-  struct TALER_WIRE_Plugin *plugin = cls;
-  struct TestClosure *tc = plugin->cls;
-
-  if (NULL != tc->ctx)
-  {
-    GNUNET_CURL_fini (tc->ctx);
-    tc->ctx = NULL;
-  }
-  if (NULL != tc->rc)
-  {
-    GNUNET_CURL_gnunet_rc_destroy (tc->rc);
-    tc->rc = NULL;
-  }
-  switch (tc->auth.method)
-  {
-  case TALER_BANK_AUTH_NONE:
-    break;
-  case TALER_BANK_AUTH_BASIC:
-    if (NULL != tc->auth.details.basic.username)
-    {
-      GNUNET_free (tc->auth.details.basic.username);
-      tc->auth.details.basic.username = NULL;
-    }
-    if (NULL != tc->auth.details.basic.password)
-    {
-      GNUNET_free (tc->auth.details.basic.password);
-      tc->auth.details.basic.password = NULL;
-    }
-    break;
-  }
-  GNUNET_free_non_null (tc->currency);
-  GNUNET_free_non_null (tc->bank_url);
-  GNUNET_free (tc);
-  GNUNET_free (plugin);
-  return NULL;
-}
-
-/* end of plugin_wire_test.c */
diff --git a/src/wire/test_sepa_wireformat.c b/src/wire/test_sepa_wireformat.c
deleted file mode 100644
index 07a3784c6..000000000
--- a/src/wire/test_sepa_wireformat.c
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
-  This file is part of TALER
-  (C) 2015, 2016 GNUnet e.V.
-
-  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 wire/test_sepa_wireformat.c
- * @brief Tests for JSON SEPA format validation
- * @author Sree Harsha Totakura <sreeharsha@totakura.in>
- */
-
-#include "platform.h"
-#include "taler_util.h"
-#include "taler_wire_lib.h"
-
-
-/* Valid SEPA data */
-static const char * const valid_wire_str =
-    "{ \"type\":\"SEPA\", \
-\"iban\":\"DE67830654080004822650\",                 \
-\"name\":\"GNUnet e.V.\",                               \
-\"bic\":\"GENODEF1SLR\",                                 \
-\"salt\":\"123456789\",                                     \
-\"address\": \"foobar\"}";
-
-/* IBAN has wrong country code */
-static const char * const invalid_wire_str =
-    "{ \"type\":\"SEPA\", \
-\"iban\":\"XX67830654080004822650\",                 \
-\"name\":\"GNUnet e.V.\",                               \
-\"bic\":\"GENODEF1SLR\",                                 \
-\"salt\":\"123456789\",                                     \
-\"address\": \"foobar\"}";
-
-/* IBAN has wrong checksum */
-static const char * const invalid_wire_str2 =
-    "{ \"type\":\"SEPA\", \
-\"iban\":\"DE67830654080004822651\",                 \
-\"name\":\"GNUnet e.V.\",                               \
-\"bic\":\"GENODEF1SLR\",                                 \
-\"salt\":\"123456789\",                                     \
-\"address\": \"foobar\"}";
-
-/* Unsupported wireformat type */
-static const char * const unsupported_wire_str =
-    "{ \"type\":\"unsupported\", \
-\"iban\":\"DE67830654080004822650\",                 \
-\"name\":\"GNUnet e.V.\",                               \
-\"bic\":\"GENODEF1SLR\",                                 \
-\"salt\":\"123456789\",                                     \
-\"address\": \"foobar\"}";
-
-
-int
-main(int argc,
-     const char *const argv[])
-{
-  json_t *wire;
-  char *emsg;
-  json_error_t error;
-  int ret;
-  struct GNUNET_CONFIGURATION_Handle *cfg;
-  struct TALER_WIRE_Plugin *plugin;
-
-  GNUNET_log_setup ("test-sepa-wireformats",
-                    "WARNING",
-                    NULL);
-  cfg = GNUNET_CONFIGURATION_create ();
-  GNUNET_CONFIGURATION_set_value_string (cfg,
-                                         "taler",
-                                         "currency",
-                                         "EUR");
-  plugin = TALER_WIRE_plugin_load (cfg,
-                                   "sepa");
-  GNUNET_assert (NULL != plugin);
-  (void) memset(&error, 0, sizeof(error));
-  GNUNET_assert (NULL != (wire = json_loads (unsupported_wire_str, 0, NULL)));
-  GNUNET_assert (TALER_EC_NONE != plugin->wire_validate (NULL,
-                                                         wire,
-                                                         NULL,
-                                                         &emsg));
-  GNUNET_free (emsg);
-  json_decref (wire);
-  GNUNET_assert (NULL != (wire = json_loads (invalid_wire_str, 0, NULL)));
-  GNUNET_assert (TALER_EC_NONE != plugin->wire_validate (NULL,
-                                                         wire,
-                                                         NULL,
-                                                         &emsg));
-  GNUNET_free (emsg);
-  json_decref (wire);
-  GNUNET_assert (NULL != (wire = json_loads (invalid_wire_str2, 0, NULL)));
-  GNUNET_assert (TALER_EC_NONE != plugin->wire_validate (NULL,
-                                                         wire,
-                                                         NULL,
-                                                         &emsg));
-  GNUNET_free (emsg);
-  json_decref (wire);
-  GNUNET_assert (NULL != (wire = json_loads (valid_wire_str, 0, &error)));
-  ret = plugin->wire_validate (NULL,
-                               wire,
-                               NULL,
-                               &emsg);
-  json_decref (wire);
-  TALER_WIRE_plugin_unload (plugin);
-  GNUNET_CONFIGURATION_destroy (cfg);
-  if (TALER_EC_NONE != ret)
-    return 1;
-  return 0;
-}
diff --git a/src/wire/test_wire_plugin.c b/src/wire/test_wire_plugin.c
deleted file mode 100644
index f5dba01aa..000000000
--- a/src/wire/test_wire_plugin.c
+++ /dev/null
@@ -1,269 +0,0 @@
-/*
-  This file is part of TALER
-  (C) 2015, 2016, 2017 GNUnet e.V. and Inria
-
-  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 wire/test_wire_plugin.c
- * @brief Tests for wire plugins
- * @author Christian Grothoff
- * @author Sree Harsha Totakura <sreeharsha@totakura.in>
- */
-#include "platform.h"
-#include "taler_util.h"
-#include "taler_wire_lib.h"
-#include "taler_wire_plugin.h"
-#include <gnunet/gnunet_json_lib.h>
-#include <jansson.h>
-
-
-/**
- * Definitions for a test with a plugin.
- */
-struct TestBlock {
-
-  /**
-   * Name of the plugin to test.
-   */
-  const char *plugin_name;
-
-  /**
-   * JSON template expected by the plugin for an account definition.
-   */
-  const char *json_proto;
-
-  /**
-   * Amount to give to the rounding function.
-   */
-  const char *round_in;
-
-  /**
-   * Expected result from rounding.
-   */
-  const char *round_out;
-
-  /**
-   * Currency to give to the plugin.
-   */ 
-  const char *currency;
-};
-
-
-/**
- * List of plugins and (unsigned) JSON account definitions
- * to use for the tests.
- */
-static struct TestBlock tests[] = {
-  {
-    .plugin_name = "sepa",
-    .json_proto = "{  \"type\":\"sepa\", \"iban\":\"DE67830654080004822650\", \"name\":\"GNUnet e.V.\", \"bic\":\"GENODEF1SLR\" }",
-    .round_in = "EUR:0.123456",
-    .round_out = "EUR:0.12",
-    .currency = "EUR"
-  },
-  {
-    .plugin_name = "test",
-    .json_proto = "{  \"type\":\"test\", \"bank_url\":\"http://localhost/\", \"account_number\":42 }",
-    .round_in = "KUDOS:0.123456",
-    .round_out = "KUDOS:0.12",
-    .currency = "KUDOS"
-  },
-  {
-    NULL, NULL, NULL, NULL, NULL
-  }
-};
-
-
-/**
- * Private key used to sign wire details.
- */
-static struct TALER_MasterPrivateKeyP priv_key;
-
-/**
- * Public key matching #priv_key.
- */
-static struct TALER_MasterPublicKeyP pub_key;
-
-/**
- * Our configuration.
- */
-static struct GNUNET_CONFIGURATION_Handle *cfg;
-
-
-/**
- * Run the test.
- *
- * @param test details of the test
- * @param plugin plugin to test
- * @param wire wire details for testing
- * @return #GNUNET_OK on success
- */
-static int
-run_test (const struct TestBlock *test,
-          struct TALER_WIRE_Plugin *plugin,
-          json_t *wire)
-{
-  struct GNUNET_HashCode salt;
-  struct TALER_MasterSignatureP sig;
-  json_t *lwire;
-  struct TALER_Amount in;
-  struct TALER_Amount expect;
-  char *emsg;
-
-  GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_NONCE,
-                              &salt,
-                              sizeof (salt));
-  if (GNUNET_OK !=
-      plugin->sign_wire_details (plugin->cls,
-                                 wire,
-                                 &priv_key,
-                                 &salt,
-                                 &sig))
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  json_object_set_new (wire,
-                       "salt",
-                       GNUNET_JSON_from_data (&salt,
-                                              sizeof (salt)));
-  json_object_set_new (wire,
-                       "sig",
-                       GNUNET_JSON_from_data (&sig,
-                                              sizeof (sig)));
-  if (TALER_EC_NONE !=
-      plugin->wire_validate (plugin->cls,
-                             wire,
-                             &pub_key,
-                             &emsg))
-  {
-    GNUNET_break (0);
-    GNUNET_free (emsg);
-    return GNUNET_SYSERR;
-  }
-  /* load wire details from file */
-  lwire = plugin->get_wire_details (plugin->cls,
-                                    cfg,
-                                    test->plugin_name);
-  if (NULL == lwire)
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  if (TALER_EC_NONE !=
-      plugin->wire_validate (plugin->cls,
-                             lwire,
-                             &pub_key,
-                             &emsg))
-  {
-    GNUNET_break (0);
-    GNUNET_free (emsg);
-    json_decref (lwire);
-    return GNUNET_SYSERR;
-  }
-  json_decref (lwire);
-  GNUNET_assert (GNUNET_OK ==
-                 TALER_string_to_amount (test->round_in,
-                                         &in));
-  GNUNET_assert (GNUNET_OK ==
-                 TALER_string_to_amount (test->round_out,
-                                         &expect));
-  if (GNUNET_OK !=
-      plugin->amount_round (plugin->cls,
-                            &in))
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  if (0 != TALER_amount_cmp (&in, &expect))
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  if (GNUNET_NO !=
-      plugin->amount_round (plugin->cls,
-                            &in))
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  memset (&in, 0, sizeof (in));
-  GNUNET_log_skip (GNUNET_ERROR_TYPE_ERROR, 1);
-  if (GNUNET_SYSERR !=
-      plugin->amount_round (plugin->cls,
-                            &in))
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-int
-main (int argc,
-      const char *const argv[])
-{
-  json_t *wire;
-  int ret;
-  struct TALER_WIRE_Plugin *plugin;
-  const struct TestBlock *test;
-  unsigned int i;
-  struct GNUNET_CRYPTO_EddsaPrivateKey *pk;
-
-  GNUNET_log_setup ("test-wire-plugin",
-                    "WARNING",
-                    NULL);
-  cfg = GNUNET_CONFIGURATION_create ();
-  GNUNET_assert (GNUNET_OK ==
-                 GNUNET_CONFIGURATION_load (cfg,
-                                            "test_wire_plugin.conf"));
-  pk = GNUNET_CRYPTO_eddsa_key_create_from_file ("test_wire_plugin_key.priv");
-  priv_key.eddsa_priv = *pk;
-  GNUNET_free (pk);
-  GNUNET_CRYPTO_eddsa_key_get_public (&priv_key.eddsa_priv,
-                                      &pub_key.eddsa_pub);
-  ret = GNUNET_OK;
-  for (i=0;NULL != (test = &tests[i])->plugin_name;i++)
-  {
-    GNUNET_CONFIGURATION_set_value_string (cfg,
-					   "taler",
-					   "CURRENCY",
-					   test->currency);
-    plugin = TALER_WIRE_plugin_load (cfg,
-                                     test->plugin_name);
-    GNUNET_assert (NULL != plugin);
-    wire = json_loads (test->json_proto, 0, NULL);
-    GNUNET_assert (NULL != wire);
-    ret = run_test (test, plugin, wire);
-    json_decref (wire);
-    TALER_WIRE_plugin_unload (plugin);
-    if (GNUNET_OK != ret)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-		  "%s FAILED\n",
-		  test->plugin_name);
-      break;
-    }
-    else
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE,
-		  "%s PASS\n",
-		  test->plugin_name);
-    }
-  }
-  GNUNET_CONFIGURATION_destroy (cfg);
-  if (GNUNET_OK != ret)
-    return 1;
-  return 0;
-}
diff --git a/src/wire/test_wire_plugin.conf b/src/wire/test_wire_plugin.conf
deleted file mode 100644
index 90b4f0749..000000000
--- a/src/wire/test_wire_plugin.conf
+++ /dev/null
@@ -1,21 +0,0 @@
-# This file is in the public domain.
-#
-[test]
-# This is the response we give out for the /wire request.  It provides
-# wallets with the bank information for transfers to the exchange.
-TEST_RESPONSE_FILE = test_wire_plugin_test.json
-
-[sepa]
-# This is the response we give out for the /wire request.  It provides
-# wallets with the bank information for transfers to the exchange.
-SEPA_RESPONSE_FILE = test_wire_plugin_sepa.json
-
-
-[exchange-wire-test]
-# For transfers made by the exchange, we need to know
-# the URL of the bank (where the /admin/add/incoming API
-# is avaialble).
-BANK_URL = http://localhost/
-
-[taler]
-CURRENCY = "EUR"
diff --git a/src/wire/test_wire_plugin_key.priv b/src/wire/test_wire_plugin_key.priv
deleted file mode 100644
index 26b4f26f6..000000000
--- a/src/wire/test_wire_plugin_key.priv
+++ /dev/null
@@ -1 +0,0 @@
-?Sg��b�@J��s;�%aK���ȉ�s_��Hў
\ No newline at end of file
diff --git a/src/wire/test_wire_plugin_sepa.json b/src/wire/test_wire_plugin_sepa.json
deleted file mode 100644
index 175345f0c..000000000
--- a/src/wire/test_wire_plugin_sepa.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "salt": "32V01R7K4T02S74PZZMVXRQ1K7FR948RBNB9BJ5Z101HEQFH7CW7J82006GY3BPTGQ4FM775PSSRD3K9MY97HSNVVCGEVBPVSAQ2710",
-  "type": "sepa",
-  "iban": "DE67830654080004822650",
-  "sig": "K48GPPM715ZXX0DC597WESD5ECT3R0B3TAFQMB68SBF4K5CZ5KCE9NESN1JX412SPZ82PSV7JAPVJFXDDTZ63YV4295S5RC28E4221G",
-  "name": "GNUnet e.V.",
-  "bic": "GENODEF1SLR"
-}
\ No newline at end of file
diff --git a/src/wire/test_wire_plugin_test.json b/src/wire/test_wire_plugin_test.json
deleted file mode 100644
index e5a0c3329..000000000
--- a/src/wire/test_wire_plugin_test.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "type": "test",
-  "bank_url": "http://localhost/",
-  "sig": "KX1CMHNFH1WE10244AEF07AXHJCF9PZDZVNZBC9P4EJEQ1MH1Y3C2TWF08VTQMK4N5TCV0V1VTGWSV0WB8TB9YQRZW87F5A6KCEZ81R",
-  "account_number": 42,
-  "salt": "EZV905MQPVAZEMGC6SEZQF2Z75P6ZKTN8TX00JHN11S7J81DQ78G8Z551K6TGR9WHPP0JW1X9J9X9CVRY48JTHBCP6Q4XKJ6R2G18G0"
-}
diff --git a/src/wire/test_wire_plugin_transactions_test.c b/src/wire/test_wire_plugin_transactions_test.c
deleted file mode 100644
index ccfde1b40..000000000
--- a/src/wire/test_wire_plugin_transactions_test.c
+++ /dev/null
@@ -1,356 +0,0 @@
-/*
-  This file is part of TALER
-  (C) 2015, 2016, 2017 GNUnet e.V. and Inria
-
-  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 wire/test_wire_plugin_transactions_test.c
- * @brief Tests performing actual transactions with the TEST wire plugin against FAKEBANK
- * @author Christian Grothoff
- */
-#include "platform.h"
-#include "taler_util.h"
-#include "taler_wire_lib.h"
-#include "taler_wire_plugin.h"
-#include "taler_fakebank_lib.h"
-#include <gnunet/gnunet_json_lib.h>
-#include <jansson.h>
-
-
-/**
- * When does the test timeout? Right now, we expect this to be very
- * fast.
- */
-#define TIMEOUT GNUNET_TIME_UNIT_SECONDS
-
-
-/**
- * Input for the wire transfer details.
- */
-static const char *json_proto =
-  "{  \"type\":\"test\", \"bank_url\":\"http://localhost:8088/\", \"account_number\":42 }";
-
-
-/**
- * Private key used to sign wire details.
- */
-static struct TALER_MasterPrivateKeyP priv_key;
-
-/**
- * Public key matching #priv_key.
- */
-static struct TALER_MasterPublicKeyP pub_key;
-
-/**
- * Our configuration.
- */
-static struct GNUNET_CONFIGURATION_Handle *cfg;
-
-/**
- * Set to #GNUNET_SYSERR if the test failed.
- */
-static int global_ret;
-
-/**
- * The 'test' plugin that we are using for the test.
- */
-static struct TALER_WIRE_Plugin *plugin;
-
-/**
- * Active preparation handle, or NULL if not active.
- */
-static struct TALER_WIRE_PrepareHandle *ph;
-
-/**
- * Active execution handle, or NULL if not active.
- */
-static struct TALER_WIRE_ExecuteHandle *eh;
-
-/**
- * Handle to the bank.
- */
-static struct TALER_FAKEBANK_Handle *fb;
-
-/**
- * Handle to the history request.
- */
-static struct TALER_WIRE_HistoryHandle *hh;
-
-/**
- * Handle for the timeout task.
- */
-static struct GNUNET_SCHEDULER_Task *tt;
-
-/**
- * Which serial ID do we expect to get from /history?
- */
-static uint64_t serial_target;
-
-/**
- * Wire transfer identifier we are using.
- */
-static struct TALER_WireTransferIdentifierRawP wtid;
-
-
-/**
- * Function called on shutdown (regular, error or CTRL-C).
- *
- * @param cls NULL
- */
-static void
-do_shutdown (void *cls)
-{
-  TALER_FAKEBANK_stop (fb);
-  fb = NULL;
-  if (NULL != eh)
-  {
-    plugin->execute_wire_transfer_cancel (plugin->cls,
-                                          eh);
-    eh = NULL;
-  }
-  if (NULL != ph)
-  {
-    plugin->prepare_wire_transfer_cancel (plugin->cls,
-                                          ph);
-    ph = NULL;
-  }
-  if (NULL != hh)
-  {
-    plugin->get_history_cancel (plugin->cls,
-                                hh);
-    hh = NULL;
-  }
-  if (NULL != tt)
-  {
-    GNUNET_SCHEDULER_cancel (tt);
-    tt = NULL;
-  }
-  TALER_WIRE_plugin_unload (plugin);
-}
-
-
-/**
- * Function called on timeout.
- *
- * @param cls NULL
- */
-static void
-timeout_cb (void *cls)
-{
-  tt = NULL;
-  GNUNET_break (0);
-  global_ret = GNUNET_SYSERR;
-  GNUNET_SCHEDULER_shutdown ();
-}
-
-
-/**
- * Callbacks of this type are used to serve the result of asking
- * the bank for the transaction history.
- *
- * @param cls closure
- * @param ec taler status code
- * @param dir direction of the transfer
- * @param row_off identification of the position at which we are querying
- * @param row_off_size number of bytes in @a row_off
- * @param details details about the wire transfer
- * @return #GNUNET_OK to continue, #GNUNET_SYSERR to abort iteration
- */
-static int
-history_result_cb (void *cls,
-                   enum TALER_ErrorCode ec,
-                   enum TALER_BANK_Direction dir,
-                   const void *row_off,
-                   size_t row_off_size,
-                   const struct TALER_WIRE_TransferDetails *details)
-{
-  uint64_t *serialp;
-  uint64_t serialh;
-  struct TALER_Amount amount;
-
-  hh = NULL;
-  if ( (TALER_BANK_DIRECTION_NONE == dir) &&
-       (GNUNET_OK == global_ret) )
-  {
-    GNUNET_SCHEDULER_shutdown ();
-    return GNUNET_OK;
-  }
-  if (sizeof (uint64_t) != row_off_size)
-  {
-    GNUNET_break (0);
-    global_ret = GNUNET_SYSERR;
-    GNUNET_SCHEDULER_shutdown ();
-    return GNUNET_SYSERR;
-  }
-  serialp = (uint64_t *) row_off;
-  serialh = GNUNET_ntohll (*serialp);
-  if (serialh != serial_target)
-  {
-    GNUNET_break (0);
-    global_ret = GNUNET_SYSERR;
-    GNUNET_SCHEDULER_shutdown ();
-    return GNUNET_SYSERR;
-  }
-  GNUNET_assert (GNUNET_OK ==
-                 TALER_string_to_amount ("KUDOS:5.01",
-                                         &amount));
-  if (0 != TALER_amount_cmp (&amount,
-                             &details->amount))
-  {
-    GNUNET_break (0);
-    global_ret = GNUNET_SYSERR;
-    GNUNET_SCHEDULER_shutdown ();
-    return GNUNET_SYSERR;
-  }
-  if (0 != memcmp (&wtid,
-                   &details->wtid,
-                   sizeof (struct TALER_WireTransferIdentifierRawP)))
-  {
-    GNUNET_break (0);
-    global_ret = GNUNET_SYSERR;
-    GNUNET_SCHEDULER_shutdown ();
-    return GNUNET_SYSERR;
-  }
-  global_ret = GNUNET_OK;
-  return GNUNET_OK;
-}
-
-
-/**
- * Function called with the result from the execute step.
- *
- * @param cls closure
- * @param success #GNUNET_OK on success, #GNUNET_SYSERR on failure
- * @param serial_id unique ID of the wire transfer in the bank's records; UINT64_MAX on error
- * @param emsg NULL on success, otherwise an error message
- */
-static void
-confirmation_cb (void *cls,
-                 int success,
-                 uint64_t serial_id,
-                 const char *emsg)
-{
-  eh = NULL;
-  if (GNUNET_OK != success)
-  {
-    GNUNET_break (0);
-    global_ret = GNUNET_SYSERR;
-    GNUNET_SCHEDULER_shutdown ();
-    return;
-  }
-  serial_target = serial_id;
-  hh = plugin->get_history (plugin->cls,
-                            TALER_BANK_DIRECTION_BOTH,
-                            NULL, 0,
-                            5,
-                            &history_result_cb,
-                            NULL);
-}
-
-
-/**
- * Callback with prepared transaction.
- *
- * @param cls closure
- * @param buf transaction data to persist, NULL on error
- * @param buf_size number of bytes in @a buf, 0 on error
- */
-static void
-prepare_cb (void *cls,
-            const char *buf,
-            size_t buf_size)
-{
-  ph = NULL;
-  if (NULL == buf)
-  {
-    GNUNET_break (0);
-    global_ret = GNUNET_SYSERR;
-    GNUNET_SCHEDULER_shutdown ();
-    return;
-  }
-  plugin->execute_wire_transfer (plugin->cls,
-                                 buf,
-                                 buf_size,
-                                 &confirmation_cb,
-                                 NULL);
-}
-
-
-/**
- * Run the test.
- *
- * @param cls NULL
- */
-static void
-run (void *cls)
-{
-  json_t *wire;
-  struct TALER_Amount amount;
-
-  GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
-                                 NULL);
-  tt = GNUNET_SCHEDULER_add_delayed (TIMEOUT,
-                                     &timeout_cb,
-                                     NULL);
-  GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
-                              &wtid,
-                              sizeof (wtid));
-  GNUNET_assert (GNUNET_OK ==
-                 TALER_string_to_amount ("KUDOS:5.01",
-                                         &amount));
-  wire = json_loads (json_proto,
-                     0,
-                     NULL);
-  fb = TALER_FAKEBANK_start (8088);
-  ph = plugin->prepare_wire_transfer (plugin->cls,
-                                      wire,
-                                      &amount,
-                                      "https://exchange.net/",
-                                      &wtid,
-                                      &prepare_cb,
-                                      NULL);
-  json_decref (wire);
-}
-
-
-int
-main (int argc,
-      const char *const argv[])
-{
-  struct GNUNET_CRYPTO_EddsaPrivateKey *pk;
-
-  GNUNET_log_setup ("test-wire-plugin-transactions-test",
-                    "WARNING",
-                    NULL);
-  cfg = GNUNET_CONFIGURATION_create ();
-  GNUNET_assert (GNUNET_OK ==
-                 GNUNET_CONFIGURATION_load (cfg,
-                                            "test_wire_plugin_transactions_test.conf"));
-  pk = GNUNET_CRYPTO_eddsa_key_create_from_file ("test_wire_plugin_key.priv");
-  priv_key.eddsa_priv = *pk;
-  GNUNET_free (pk);
-  GNUNET_CRYPTO_eddsa_key_get_public (&priv_key.eddsa_priv,
-                                      &pub_key.eddsa_pub);
-  global_ret = GNUNET_OK;
-  plugin = TALER_WIRE_plugin_load (cfg,
-                                   "test");
-  GNUNET_assert (NULL != plugin);
-  GNUNET_SCHEDULER_run (&run,
-                        NULL);
-  GNUNET_CONFIGURATION_destroy (cfg);
-  if (GNUNET_OK != global_ret)
-    return 1;
-  return 0;
-}
-
-/* end of test_wire_plugin_transactions_test.c */
diff --git a/src/wire/test_wire_plugin_transactions_test.conf b/src/wire/test_wire_plugin_transactions_test.conf
deleted file mode 100644
index 42fb51b79..000000000
--- a/src/wire/test_wire_plugin_transactions_test.conf
+++ /dev/null
@@ -1,15 +0,0 @@
-# This file is in the public domain.
-#
-[test]
-# This is the response we give out for the /wire request.  It provides
-# wallets with the bank information for transfers to the exchange.
-TEST_RESPONSE_FILE = test_wire_plugin_test.json
-
-[exchange-wire-test]
-# For transfers made by the exchange, we need to know
-# the URL of the bank (where the /admin/add/incoming API
-# is avaialble).
-BANK_URL= http://localhost:8088/
-
-[taler]
-CURRENCY = "KUDOS"
diff --git a/src/wire/wire-sepa.conf b/src/wire/wire-sepa.conf
deleted file mode 100644
index eb43d3dcc..000000000
--- a/src/wire/wire-sepa.conf
+++ /dev/null
@@ -1,15 +0,0 @@
-# This file is in the public domain.
-#
-# Configuration for SEPA wire plugin.
-
-[exchange-wire-sepa]
-# Set to "YES" to activate the 'sepa' plugin.
-ENABLE = NO
-
-# This is the response we give out for the /wire request.  It provides
-# wallets with the bank information for transfers to the exchange.
-SEPA_RESPONSE_FILE = ${TALER_CONFIG_HOME}/exchange/wire/sepa.json
-
-[exchange-wire-outgoing-sepa]
-# This section should contain the options required for making outgoing
-# SEPA transfers. Not yet supported (need libebics).
diff --git a/src/wire/wire-test.conf b/src/wire/wire-test.conf
deleted file mode 100644
index 7ee217ee1..000000000
--- a/src/wire/wire-test.conf
+++ /dev/null
@@ -1,22 +0,0 @@
-# This file is in the public domain.
-#
-# Configuration for TEST wire plugin.
-#
-[exchange-wire-test]
-# Set to "YES" to activate the 'test' plugin.
-ENABLE = NO
-
-# This is the response we give out for the /wire request.  It provides
-# wallets with the bank information for transfers to the exchange.
-TEST_RESPONSE_FILE = ${TALER_CONFIG_HOME}/exchange/wire/test.json
-
-# We need to know the exchange's account number at the bank.
-EXCHANGE_ACCOUNT_NUMBER = 2
-
-# For accessing transfers, we need to know
-# the URL of the bank (where the /history API is available).
-# BANK_URL = https://bank.demo.taler.net/
-
-# Authentication information for basic authentication
-USERNAME = user
-PASSWORD = pass
diff --git a/src/wire/wire.c b/src/wire/wire.c
index 58180b7b1..aeb8689e6 100644
--- a/src/wire/wire.c
+++ b/src/wire/wire.c
@@ -146,80 +146,4 @@ TALER_WIRE_plugin_unload (struct TALER_WIRE_Plugin *plugin)
 }
 
 
-/**
- * Closure of #check_for_wire.
- */
-struct FindEnabledWireContext
-{
-  /**
-   * Configuration we are usign.
-   */
-  const struct GNUNET_CONFIGURATION_Handle *cfg;
-
-  /**
-   * Callback to invoke.
-   */
-  TALER_WIRE_EnabledCallback cb;
-
-  /**
-   * Closure for @e cb.
-   */
-  void *cb_cls;
-};
-
-
-/**
- * Check if @a section begins with "exchange-wire-", and if
- * so if the "ENABLE" option is set to "YES".  If both are
- * true, call the callback from the context with the
- * rest of the section name.
- *
- * @param cls our `struct FindEnabledWireContext`
- * @param section name of a section in the configuration
- */
-static void
-check_for_wire (void *cls,
-                const char *section)
-{
-  struct FindEnabledWireContext *ctx = cls;
-  const char *name;
-
-  if (0 != strncasecmp (section,
-                        "exchange-wire-",
-                        strlen ("exchange-wire-")))
-    return;
-  if (GNUNET_YES !=
-      GNUNET_CONFIGURATION_get_value_yesno (ctx->cfg,
-                                            section,
-                                            "ENABLE"))
-    return;
-  name = &section[strlen ("exchange-wire-")];
-  ctx->cb (ctx->cb_cls,
-           name);
-}
-
-
-/**
- * Check which wire plugins are enabled in @a cfg and call @a cb for each one.
- *
- * @param cfg configuration to use
- * @param cb callback to invoke
- * @param cb_cls closure for @a cb
- */
-void
-TALER_WIRE_find_enabled (const struct GNUNET_CONFIGURATION_Handle *cfg,
-                         TALER_WIRE_EnabledCallback cb,
-                         void *cb_cls)
-{
-  struct FindEnabledWireContext ctx;
-
-  ctx.cfg = cfg;
-  ctx.cb = cb;
-  ctx.cb_cls = cb_cls;
-  GNUNET_CONFIGURATION_iterate_sections (cfg,
-                                         &check_for_wire,
-                                         &ctx);
-}
-
-
 /* end of wire.c */
diff --git a/src/wire/wire_helper.c b/src/wire/wire_helper.c
new file mode 100644
index 000000000..34d40e11e
--- /dev/null
+++ b/src/wire/wire_helper.c
@@ -0,0 +1,57 @@
+/*
+  This file is part of TALER
+  (C) 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 wire/wire_helper.c
+ * @brief Helper functions for dealing with wire formats
+ * @author Christian Grothoff <christian@grothoff.org>
+ */
+#include "platform.h"
+#include "taler_util.h"
+#include "taler_wire_lib.h"
+
+/**
+ * Prefix of PAYTO URLs.
+ */
+#define PAYTO "payto://"
+
+
+/**
+ * Obtain the payment method from a @a payto_url
+ *
+ * @param payto_url the URL to parse
+ * @return NULL on error (malformed @a payto_url)
+ */
+char *
+TALER_WIRE_payto_get_method (const char *payto_url)
+{
+  const char *start;
+  const char *end;
+
+  if (0 != strncmp (payto_url,
+                    PAYTO,
+                    strlen (PAYTO)))
+    return NULL;
+  start = &payto_url[strlen(PAYTO)];
+  end = strchr (start,
+                (unsigned char) '/');
+  if (NULL == end)
+    return NULL;
+  return GNUNET_strndup (start,
+                         end - start);
+}
+
+/* end of wire_helper.c */