changing wire plugin specification from [exchange]WIREFORMAT to [exchange-wire-PLUGIN]enable=YES/NO

src/benchmark/taler-exchange-benchmark.conf

@@ -11,11 +11,6 @@ CURRENCY = KUDOS
 
 [exchange]
 
-# Wire format supported by the exchange
-# We use 'test' for testing of the actual
-# coin operations, and 'sepa' to test SEPA-specific routines.
-WIREFORMAT = test
-
 # HTTP port the exchange listens to
 PORT = 8081
 # How to access our database
@@ -27,6 +22,9 @@ MASTER_PUBLIC_KEY = 98NJW3CQHZQGQXTY3K85K531XKPAPAVV4Q5V8PYYRR00NJGZWNVG
 [exchangedb-postgres]
 DB_CONN_STR = "postgres:///talercheck"
 
+[exchange-wire-test]
+# Enable 'test' for testing of the actual coin operations.
+ENABLE = YES
 
 [exchange-wire-outgoing-test]
 # What is the main website of the bank?
@@ -88,4 +86,3 @@ fee_deposit = KUDOS:0.00
 fee_refresh = KUDOS:0.00
 fee_refund = KUDOS:0.00
 rsa_keysize = 1024
-

src/exchange-lib/test_exchange_api.conf

@@ -10,11 +10,6 @@ CURRENCY = EUR
 
 [exchange]
 
-# Wire format supported by the exchange
-# We use 'test' for testing of the actual
-# coin operations, and 'sepa' to test SEPA-specific routines.
-WIREFORMAT = test sepa
-
 # HTTP port the exchange listens to
 PORT = 8081
 
@@ -31,11 +26,19 @@ BASE_URL = "https://exchange.com/"
 [exchangedb-postgres]
 DB_CONN_STR = "postgres:///talercheck"
 
+[exchange-wire-sepa]
+# Enable 'sepa' to test SEPA-specific routines.
+ENABLE = YES
+
 [exchange-wire-incoming-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 = ${TALER_CONFIG_HOME}/sepa.json
 
+[exchange-wire-test]
+# Enable 'test' for testing of the actual coin operations.
+ENABLE = YES
+
 [exchange-wire-incoming-test]
 # This is the response we give out for the /wire request.  It provides
 # wallets with the bank information for transfers to the exchange.

src/exchange/exchange.conf

@@ -7,10 +7,6 @@
 # in respective subdirectories.)
 KEYDIR = ${TALER_DATA_HOME}/exchange/live-keys/
 
-# Wire format supported by the exchange.  We use 'test' for testing of
-# the actual coin operations.
-# WIREFORMAT = test
-
 # Master public key used to sign the exchange's various keys
 # MASTER_PUBLIC_KEY = 98NJW3CQHZQGQXTY3K85K531XKPAPAVV4Q5V8PYYRR00NJGZWNVG
 

src/exchange/test-taler-exchange-aggregator-postgres.conf

@@ -10,11 +10,6 @@ CURRENCY = EUR
 # The DB plugin to use
 DB = postgres
 
-# Wire format supported by the exchange
-# We use 'test' for testing of the actual
-# coin operations.
-WIREFORMAT = test
-
 # HTTP port the exchange listens to
 PORT = 8081
 
@@ -30,6 +25,9 @@ BASE_URL = "https://exchange.taler.net/"
 DB_CONN_STR = postgres:///talercheck
 
 
+[exchange-wire-test]
+# Enable 'test' for testing of the actual coin operations.
+ENABLE = YES
 
 [exchange-wire-outgoing-test]
 # What is the main website of the bank?

src/exchange/test_taler_exchange_httpd.conf

@@ -9,11 +9,6 @@ CURRENCY = EUR
 
 [exchange]
 
-# Wire format supported by the exchange
-# We use 'test' for testing of the actual
-# coin operations.
-WIREFORMAT = test
-
 # HTTP port the exchange listens to
 PORT = 8081
 
@@ -27,6 +22,9 @@ DB = postgres
 [exchangedb-postgres]
 DB_CONN_STR = "postgres:///talercheck"
 
+[exchange-wire-test]
+# Enable 'test' for testing of the actual coin operations.
+ENABLE = YES
 
 [exchange-wire-outgoing-test]
 # What is the main website of the bank?

src/exchangedb/exchangedb.conf

@@ -5,3 +5,10 @@
 [exchangedb]
 # Where do we expect to find information about auditors?
 AUDITOR_BASE_DIR = ${TALER_DATA_HOME}/auditors/
+
+# Where do we expect to find information about wire transfer fees
+# for aggregate payments?  These are the amounts we charge (subtract)
+# the merchant per wire transfer.  The directory is expected to
+# contain files "$METHOD.fee" with the cost structure, where
+# $METHOD corresponds to a wire transfer method.
+WIREFEE_BASE_DIR = ${TALER_DATA_HOME}/wirefees/

src/exchangedb/exchangedb_fees.c

@@ -0,0 +1,243 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2017 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 exchangedb/exchangedb_fees.c
+ * @brief Logic to read/write/convert aggregation wire fees (not other fees!)
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_exchangedb_lib.h"
+
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * Structure for wire fees on disk.
+ */
+struct TALER_WireFeeDiskP
+{
+
+  /**
+   * Wire fee details.
+   */
+  struct TALER_MasterWireFeePS wf;
+
+
+  /**
+   * Signature affirming the above fee structure.
+   */
+  struct TALER_MasterSignatureP master_sig;
+
+};
+
+GNUNET_NETWORK_STRUCT_END
+
+
+/**
+ * Convert @a wd disk format to host format.
+ *
+ * @param wd aggregate fees, disk format
+ * @return fees in host format
+ */
+static struct TALER_EXCHANGEDB_AggregateFees *
+wd2af (const struct TALER_WireFeeDiskP *wd)
+{
+  struct TALER_EXCHANGEDB_AggregateFees *af;
+
+  af = GNUNET_new (struct TALER_EXCHANGEDB_AggregateFees);
+  af->start_date = GNUNET_TIME_absolute_ntoh (wd->wf.start_date);
+  af->end_date = GNUNET_TIME_absolute_ntoh (wd->wf.end_date);
+  TALER_amount_ntoh (&af->wire_fee,
+                     &wd->wf.wire_fee);
+  af->master_sig = wd->master_sig;
+  return af;
+}
+
+
+/**
+ * Read the current fee structure from disk.
+ *
+ * @param cfg configuration to use
+ * @param wireplugin name of the wire plugin to read fees for
+ * @return sorted list of aggregation fees, NULL on error
+ */
+struct TALER_EXCHANGEDB_AggregateFees *
+TALER_EXCHANGEDB_fees_read (const struct GNUNET_CONFIGURATION_Handle *cfg,
+                            const char *wireplugin)
+{
+  char *wirefee_base_dir;
+  char *fn;
+  struct GNUNET_DISK_FileHandle *fh;
+  struct TALER_WireFeeDiskP wd;
+  struct TALER_EXCHANGEDB_AggregateFees *af;
+  struct TALER_EXCHANGEDB_AggregateFees *endp;
+
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_get_value_filename (cfg,
+                                               "exchangedb",
+                                               "WIREFEE_BASE_DIR",
+                                               &wirefee_base_dir))
+    return NULL;
+  GNUNET_asprintf (&fn,
+                   "%s" DIR_SEPARATOR_STR "%s.fee",
+                   wirefee_base_dir,
+                   wireplugin);
+  GNUNET_free (wirefee_base_dir);
+  fh = GNUNET_DISK_file_open (fn,
+                              GNUNET_DISK_OPEN_READ,
+                              GNUNET_DISK_PERM_NONE);
+  GNUNET_free (fn);
+  if (NULL == fh)
+    return NULL;
+
+  af = NULL;
+  endp = NULL;
+  while (sizeof (wd) ==
+         GNUNET_DISK_file_read (fh,
+                                &wd,
+                                sizeof (wd)))
+  {
+    struct TALER_EXCHANGEDB_AggregateFees *n;
+
+    n = wd2af (&wd);
+    if ( ( (NULL == af) ||
+           (endp->end_date.abs_value_us == n->start_date.abs_value_us) ) &&
+         (n->start_date.abs_value_us < n->end_date.abs_value_us) )
+    {
+      /* append to list */
+      if (NULL != endp)
+        endp->next = n;
+      else
+        af = n;
+      endp = n;
+    }
+    else
+    {
+      /* We expect file to be in chronological order! */
+      GNUNET_break (0);
+      GNUNET_DISK_file_close (fh);
+      GNUNET_free (n);
+      TALER_EXCHANGEDB_fees_free (af);
+      return NULL;
+    }
+  }
+  GNUNET_DISK_file_close (fh);
+  return af;
+}
+
+
+/**
+ * Convert @a af to @a wf.
+ *
+ * @param[in,out] af aggregate fees, host format (updated to round time)
+ * @param[out] wf aggregate fees, disk / signature format
+ */
+void
+TALER_EXCHANGEDB_fees_2_wf (struct TALER_EXCHANGEDB_AggregateFees *af,
+                            struct TALER_MasterWireFeePS *wf)
+{
+  (void) GNUNET_TIME_round_abs (&af->start_date);
+  (void) GNUNET_TIME_round_abs (&af->end_date);
+  wf->purpose.size = htonl (sizeof (*wf));
+  wf->purpose.purpose = htonl (TALER_SIGNATURE_MASTER_WIRE_FEES);
+  wf->start_date = GNUNET_TIME_absolute_hton (af->start_date);
+  wf->end_date = GNUNET_TIME_absolute_hton (af->end_date);
+  TALER_amount_hton (&wf->wire_fee,
+                     &af->wire_fee);
+}
+
+
+/**
+ * Write given fee structure to disk.
+ *
+ * @param filename where to write the fees
+ * @param af fee structure to write
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+TALER_EXCHANGEDB_fees_write (const char *filename,
+                             struct TALER_EXCHANGEDB_AggregateFees *af)
+{
+  struct GNUNET_DISK_FileHandle *fh;
+  struct TALER_WireFeeDiskP wd;
+  struct TALER_EXCHANGEDB_AggregateFees *last;
+
+  if (GNUNET_OK !=
+      GNUNET_DISK_directory_create_for_file (filename))
+    return GNUNET_SYSERR;
+
+  fh = GNUNET_DISK_file_open (filename,
+                              GNUNET_DISK_OPEN_WRITE |
+                              GNUNET_DISK_OPEN_TRUNCATE |
+                              GNUNET_DISK_OPEN_CREATE,
+                              GNUNET_DISK_PERM_USER_READ |
+                              GNUNET_DISK_PERM_USER_WRITE);
+  if (NULL == fh)
+    return GNUNET_SYSERR;
+
+  last = NULL;
+  while (NULL != af)
+  {
+    if ( ( (NULL != last) &&
+           (last->end_date.abs_value_us != af->start_date.abs_value_us) ) ||
+         (af->start_date.abs_value_us >= af->end_date.abs_value_us) )
+    {
+      /* @a af malformed, refusing to write file that will be rejected */
+      GNUNET_break (0);
+      GNUNET_assert (GNUNET_OK ==
+                     GNUNET_DISK_file_close (fh));
+      return GNUNET_SYSERR;
+    }
+    TALER_EXCHANGEDB_fees_2_wf (af,
+                                &wd.wf);
+    wd.master_sig = af->master_sig;
+    af = af->next;
+    if (sizeof (wd) !=
+        GNUNET_DISK_file_write (fh,
+                                &wd,
+                                sizeof (wd)))
+    {
+      GNUNET_assert (GNUNET_OK ==
+                     GNUNET_DISK_file_close (fh));
+      return GNUNET_SYSERR;
+    }
+  }
+  GNUNET_assert (GNUNET_OK ==
+                 GNUNET_DISK_file_close (fh));
+  return GNUNET_OK;
+}
+
+
+/**
+ * Free @a af data structure
+ *
+ * @param af list to free
+ */
+void
+TALER_EXCHANGEDB_fees_free (struct TALER_EXCHANGEDB_AggregateFees *af)
+{
+  struct TALER_EXCHANGEDB_AggregateFees *next;
+
+  while (NULL != af)
+  {
+    next = af->next;
+    GNUNET_free (af);
+    af = next;
+  }
+}
+
+
+/* end of exchangedb_fees.c */

src/exchangedb/test_exchangedb_fees.c

@@ -0,0 +1,46 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2017 Inria & 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 exchangedb/test_exchangedb_fees.c
+ * @brief test cases for functions in exchangedb/exchangedb_fees.c
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet/gnunet_util_lib.h"
+#include "taler_signatures.h"
+#include "taler_exchangedb_lib.h"
+
+
+int
+main (int argc,
+      const char *const argv[])
+{
+  struct GNUNET_CONFIGURATION_Handle *cfg;
+  int ret;
+
+  ret = 1;
+  GNUNET_log_setup ("test-exchangedb-fees",
+                    "WARNING",
+                    NULL);
+  cfg = GNUNET_CONFIGURATION_create ();
+
+  GNUNET_CONFIGURATION_set_value_string (cfg,
+                                         "exchangedb",
+                                         "AUDITOR_BASE_DIR",
+                                         tmpdir);
+  ret = 0;
+  return ret;
+}

src/include/taler_wire_lib.h

@@ -45,4 +45,28 @@ void
 TALER_WIRE_plugin_unload (struct TALER_WIRE_Plugin *plugin);
 
 
+/**
+ * Signature of a function to be called on each enabled
+ * wire plugin.
+ *
+ * @param cls closure
+ * @param name name of the enabled plugin
+ */
+typedef void
+(*TALER_WIRE_EnabledCallback)(void *cls,
+                              const char *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);
+
 #endif

src/wire/wire-sepa.conf

@@ -1,5 +1,11 @@
+# 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
+
 [exchange-wire-incoming-sepa]
 # This is the response we give out for the /wire request.  It provides
 # wallets with the bank information for transfers to the exchange.

src/wire/wire-test.conf

@@ -1,5 +1,11 @@
 # 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
+
 [exchange-wire-incoming-test]
 # This is the response we give out for the /wire request.  It provides
 # wallets with the bank information for transfers to the exchange.

src/wire/wire.c

@@ -1,6 +1,6 @@
 /*
   This file is part of TALER
-  (C) 2015, 2016 GNUnet e.V.
+  (C) 2015, 2016, 2017 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
@@ -69,4 +69,80 @@ 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 */