second round of renamefest

30 files changed, 277 insertions, 282 deletions

diff --git a/configure.ac b/configure.ac
index f69bcefd2..abc23c1f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -174,7 +174,9 @@ AC_CONFIG_FILES([Makefile
                  src/include/Makefile
                  src/util/Makefile
                  src/pq/Makefile
+                 src/mintdb/Makefile
                  src/mint/Makefile
-                 src/lib/Makefile
+                 src/mint-tools/Makefile
+                 src/mint-lib/Makefile
                  ])
 AC_OUTPUT
diff --git a/src/Makefile.am b/src/Makefile.am
index 0315beadc..a2d3ebcd9 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,3 +1,3 @@
 # This Makefile.am is in the public domain
 AM_CPPFLAGS = -I$(top_srcdir)/src/include
-SUBDIRS = include util pq mint lib
+SUBDIRS = include util pq mintdb mint mint-tools mint-lib
diff --git a/src/include/Makefile.am b/src/include/Makefile.am
index 4d4c6771e..5bb4cfa20 100644
--- a/src/include/Makefile.am
+++ b/src/include/Makefile.am
@@ -8,6 +8,7 @@ talerinclude_HEADERS = \
   taler_json_lib.h \
   taler_util.h \
   taler_mint_service.h \
+  taler_mintdb_lib.h \
   taler_mintdb_plugin.h \
   taler_pq_lib.h \
   taler_signatures.h
diff --git a/src/mint/key_io.h b/src/include/taler_mintdb_lib.h
index 0ff968976..cceec3307 100644
--- a/src/mint/key_io.h
+++ b/src/include/taler_mintdb_lib.h
@@ -14,14 +14,14 @@
   TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
 */
 /**
- * @file mint/key_io.h
+ * @file include/taler_mintdb_lib.h
  * @brief IO operations for the mint's private keys
  * @author Florian Dold
  * @author Benedikt Mueller
  * @author Christian Grothoff
  */
-#ifndef KEY_IO_H
-#define KEY_IO_H
+#ifndef TALER_MINTDB_LIB_H
+#define TALER_MINTDB_LIB_H
 
 #include <gnunet/gnunet_util_lib.h>
 #include "taler_signatures.h"
@@ -184,4 +184,24 @@ TALER_MINT_read_denom_key (const char *filename,
                            struct TALER_DenominationKeyIssueInformation *dki);
 
 
+/**
+ * Initialize the plugin.
+ *
+ * @param cfg configuration to use
+ * @return NULL on failure
+ */
+struct TALER_MINTDB_Plugin *
+TALER_MINT_plugin_load (const struct GNUNET_CONFIGURATION_Handle *cfg);
+
+
+/**
+ * Shutdown the plugin.
+ *
+ * @param plugin plugin to unload
+ */
+void
+TALER_MINT_plugin_unload (struct TALER_MINTDB_Plugin *plugin);
+
+
+
 #endif
diff --git a/src/include/taler_mintdb_plugin.h b/src/include/taler_mintdb_plugin.h
index 8c9f4af23..7cd3e9202 100644
--- a/src/include/taler_mintdb_plugin.h
+++ b/src/include/taler_mintdb_plugin.h
@@ -479,9 +479,10 @@ struct TALER_MINTDB_Plugin
   void *cls;
 
   /**
-   * Name of the library which generated this plugin
+   * Name of the library which generated this plugin.  Set by the
+   * plugin loader.
    */
-  const char *library_name;
+  char *library_name;
 
   /**
    * Get the thread-local database-handle.
diff --git a/src/lib/Makefile.am b/src/mint-lib/Makefile.am
index f91ca32c1..f91ca32c1 100644
--- a/src/lib/Makefile.am
+++ b/src/mint-lib/Makefile.am
diff --git a/src/lib/mint_api.c b/src/mint-lib/mint_api.c
index 019793b78..019793b78 100644
--- a/src/lib/mint_api.c
+++ b/src/mint-lib/mint_api.c
diff --git a/src/lib/test_mint_api.c b/src/mint-lib/test_mint_api.c
index a068dde93..a068dde93 100644
--- a/src/lib/test_mint_api.c
+++ b/src/mint-lib/test_mint_api.c
diff --git a/src/mint-tools/Makefile.am b/src/mint-tools/Makefile.am
new file mode 100644
index 000000000..7ae6f355a
--- /dev/null
+++ b/src/mint-tools/Makefile.am
@@ -0,0 +1,63 @@
+# This Makefile.am is in the public domain
+AM_CPPFLAGS = -I$(top_srcdir)/src/include
+
+bin_PROGRAMS = \
+  taler-mint-keyup \
+  taler-mint-keycheck \
+  taler-mint-reservemod \
+  taler-mint-dbinit
+
+taler_mint_keyup_SOURCES = \
+  taler-mint-keyup.c
+
+taler_mint_keyup_LDADD = \
+  $(LIBGCRYPT_LIBS) \
+  $(top_builddir)/src/util/libtalerutil.la \
+  $(top_builddir)/src/pq/libtalerpq.la \
+  $(top_builddir)/src/mint/libtalermint_common.la \
+  -lgnunetutil
+taler_mint_keyup_LDFLAGS = $(POSTGRESQL_LDFLAGS)
+
+
+taler_mint_keycheck_SOURCES = \
+  taler-mint-keycheck.c
+
+taler_mint_keycheck_LDADD = \
+  $(LIBGCRYPT_LIBS) \
+  $(top_builddir)/src/util/libtalerutil.la \
+  $(top_builddir)/src/pq/libtalerpq.la \
+  $(top_builddir)/src/mint/libtalermint_common.la \
+  -lgnunetutil
+taler_mint_keycheck_LDFLAGS = $(POSTGRESQL_LDFLAGS)
+
+taler_mint_reservemod_SOURCES = \
+  taler-mint-reservemod.c
+taler_mint_reservemod_LDADD = \
+  $(LIBGCRYPT_LIBS) \
+  $(top_builddir)/src/util/libtalerutil.la \
+  $(top_builddir)/src/pq/libtalerpq.la \
+  $(top_builddir)/src/mint/libtalermint_common.la \
+  -lpq \
+  -lgnunetutil
+taler_mint_reservemod_LDFLAGS = \
+  $(POSTGRESQL_LDFLAGS)
+taler_mint_reservemod_CPPFLAGS = \
+  -I$(top_srcdir)/src/include \
+  -I$(top_srcdir)/src/pq/ \
+  $(POSTGRESQL_CPPFLAGS)
+
+taler_mint_dbinit_SOURCES = \
+  taler-mint-dbinit.c
+taler_mint_dbinit_LDADD = \
+  $(LIBGCRYPT_LIBS) \
+  $(top_builddir)/src/util/libtalerutil.la \
+  $(top_builddir)/src/pq/libtalerpq.la \
+  $(top_builddir)/src/mint/libtalermint_common.la \
+  -lpq \
+  -lgnunetutil
+taler_mint_dbinit_LDFLAGS = \
+  $(POSTGRESQL_LDFLAGS)
+taler_mint_dbinit_CPPFLAGS = \
+  -I$(top_srcdir)/src/include \
+  -I$(top_srcdir)/src/pq/ \
+  $(POSTGRESQL_CPPFLAGS)
diff --git a/src/mint/taler-mint-dbinit.c b/src/mint-tools/taler-mint-dbinit.c
index 8056b7df0..ec08369b8 100644
--- a/src/mint/taler-mint-dbinit.c
+++ b/src/mint-tools/taler-mint-dbinit.c
@@ -23,7 +23,7 @@
 #include <libpq-fe.h>
 #include "taler_util.h"
 #include "taler_mintdb_plugin.h"
-#include "plugin.h"
+#include "taler_mintdb_lib.h"
 
 /**
  * Mint directory with the keys.
@@ -35,6 +35,11 @@ static char *mint_base_dir;
  */
 static struct GNUNET_CONFIGURATION_Handle *cfg;
 
+/**
+ * Our DB plugin.
+ */
+static struct TALER_MINTDB_Plugin *plugin;
+
 
 /**
  * The main function of the database initialization tool.
@@ -78,8 +83,8 @@ main (int argc,
              "Failed to load mint configuration.\n");
     return 1;
   }
-  if (GNUNET_OK !=
-      TALER_MINT_plugin_load (cfg))
+  if (NULL ==
+      (plugin = TALER_MINT_plugin_load (cfg)))
   {
     fprintf (stderr,
              "Failed to initialize database plugin.\n");
@@ -91,10 +96,10 @@ main (int argc,
   {
     fprintf (stderr,
              "Failed to initialize database.\n");
-    TALER_MINT_plugin_unload ();
+    TALER_MINT_plugin_unload (plugin);
     return 1;
   }
-  TALER_MINT_plugin_unload ();
+  TALER_MINT_plugin_unload (plugin);
   return 0;
 }
 
diff --git a/src/mint/taler-mint-keycheck.c b/src/mint-tools/taler-mint-keycheck.c
index 4e8885fd3..b18ebdf7a 100644
--- a/src/mint/taler-mint-keycheck.c
+++ b/src/mint-tools/taler-mint-keycheck.c
@@ -24,7 +24,7 @@
  */
 #include <platform.h>
 #include <gnunet/gnunet_util_lib.h>
-#include "key_io.h"
+#include "taler_mintdb_lib.h"
 
 /**
  * Mint directory with the keys.
diff --git a/src/mint/taler-mint-keyup.c b/src/mint-tools/taler-mint-keyup.c
index ab457426c..8ffe7d165 100644
--- a/src/mint/taler-mint-keyup.c
+++ b/src/mint-tools/taler-mint-keyup.c
@@ -24,7 +24,7 @@
 #include <platform.h>
 #include <gnunet/gnunet_util_lib.h>
 #include "taler_util.h"
-#include "key_io.h"
+#include "taler_mintdb_lib.h"
 
 /**
  * When generating filenames from a cryptographic hash, we do not use
diff --git a/src/mint/taler-mint-reservemod.c b/src/mint-tools/taler-mint-reservemod.c
index 125748704..3261f47cf 100644
--- a/src/mint/taler-mint-reservemod.c
+++ b/src/mint-tools/taler-mint-reservemod.c
@@ -25,7 +25,7 @@
 #include "taler_util.h"
 #include "taler_signatures.h"
 #include "taler_mintdb_plugin.h"
-#include "taler_pq_lib.h"
+#include "taler_mintdb_lib.h"
 
 
 /**
diff --git a/src/mint/Makefile.am b/src/mint/Makefile.am
index f8e5696ff..538020e9e 100644
--- a/src/mint/Makefile.am
+++ b/src/mint/Makefile.am
@@ -1,82 +1,8 @@
 # This Makefile.am is in the public domain
-AM_CPPFLAGS = -I$(top_srcdir)/src/include -I$(top_srcdir)/src/pq/ $(POSTGRESQL_CPPFLAGS)
-
-plugindir = $(libdir)/taler
-
-plugin_LTLIBRARIES = \
-  libtaler_plugin_mintdb_postgres.la
-
-EXTRA_DIST = plugin_mintdb_common.c
-
-libtaler_plugin_mintdb_postgres_la_SOURCES = \
-  plugin_mintdb_postgres.c
-libtaler_plugin_mintdb_postgres_la_LIBADD = \
-  $(LTLIBINTL)
-libtaler_plugin_mintdb_postgres_la_LDFLAGS = \
-  $(TALER_PLUGIN_LDFLAGS) \
-  -lpq \
-  -lgnunetutil
-
-lib_LTLIBRARIES = \
-  libtalermint_common.la
-
-libtalermint_common_la_SOURCES = \
-  key_io.c key_io.h \
-  plugin.c plugin.h
-
-libtalermint_common_la_LIBADD = \
-  $(top_builddir)/src/util/libtalerutil.la \
-  -lgnunetutil
-
-libtalermint_common_la_LDFLAGS = \
-  $(POSTGRESQL_LDFLAGS) \
-  -version-info 0:0:0 \
-  -no-undefined
-
+AM_CPPFLAGS = -I$(top_srcdir)/src/include
 
 bin_PROGRAMS = \
-  taler-mint-keyup \
-  taler-mint-keycheck \
-  taler-mint-reservemod \
-  taler-mint-httpd \
-  taler-mint-dbinit
-
-taler_mint_keyup_SOURCES = \
-  taler-mint-keyup.c
-
-taler_mint_keyup_LDADD = \
-  $(LIBGCRYPT_LIBS) \
-  $(top_builddir)/src/util/libtalerutil.la \
-  $(top_builddir)/src/pq/libtalerpq.la \
-  $(top_builddir)/src/mint/libtalermint_common.la \
-  -lpq \
-  -lgnunetutil
-taler_mint_keyup_LDFLAGS = $(POSTGRESQL_LDFLAGS)
-
-
-taler_mint_keycheck_SOURCES = \
-  taler-mint-keycheck.c
-
-taler_mint_keycheck_LDADD = \
-  $(LIBGCRYPT_LIBS) \
-  $(top_builddir)/src/util/libtalerutil.la \
-  $(top_builddir)/src/pq/libtalerpq.la \
-  $(top_builddir)/src/mint/libtalermint_common.la \
-  -lgnunetutil \
-  -lpq
-taler_mint_keycheck_LDFLAGS = $(POSTGRESQL_LDFLAGS)
-
-taler_mint_reservemod_SOURCES = \
-  taler-mint-reservemod.c
-taler_mint_reservemod_LDADD = \
-  $(LIBGCRYPT_LIBS) \
-  $(top_builddir)/src/util/libtalerutil.la \
-  $(top_builddir)/src/pq/libtalerpq.la \
-  $(top_builddir)/src/mint/libtalermint_common.la \
-  -lpq \
-  -lgnunetutil
-taler_mint_reservemod_LDFLAGS = \
-  $(POSTGRESQL_LDFLAGS)
+  taler-mint-httpd
 
 taler_mint_httpd_SOURCES = \
   taler-mint-httpd.c \
@@ -92,56 +18,8 @@ taler_mint_httpd_LDADD = \
   $(LIBGCRYPT_LIBS) \
   $(top_builddir)/src/util/libtalerutil.la \
   $(top_builddir)/src/pq/libtalerpq.la \
-  $(top_builddir)/src/mint/libtalermint_common.la \
-  -lpq \
+  $(top_builddir)/src/mintdb/libtalermintdb.la \
   -lmicrohttpd \
   -ljansson \
   -lgnunetutil \
   -lpthread
-taler_mint_httpd_LDFLAGS = \
-  $(POSTGRESQL_LDFLAGS)
-
-
-taler_mint_dbinit_SOURCES = \
-  taler-mint-dbinit.c
-taler_mint_dbinit_LDADD = \
-  $(LIBGCRYPT_LIBS) \
-  $(top_builddir)/src/util/libtalerutil.la \
-  $(top_builddir)/src/pq/libtalerpq.la \
-  $(top_builddir)/src/mint/libtalermint_common.la \
-  -lpq \
-  -lgnunetutil
-taler_mint_dbinit_LDFLAGS = $(POSTGRESQL_LDFLAGS)
-
-check_PROGRAMS = \
-  test-mint-deposits \
-  test-mint-common \
-  test-mint-db-postgres
-
-test_mint_deposits_SOURCES = \
-  test_mint_deposits.c
-test_mint_deposits_LDADD = \
-  libtalermint_common.la \
-  $(top_srcdir)/src/util/libtalerutil.la \
-  $(top_srcdir)/src/pq/libtalerpq.la \
-  -lgnunetutil \
-  -ljansson \
-  -lpq
-
-test_mint_common_SOURCES = \
-  test_mint_common.c
-test_mint_common_LDADD = \
-  libtalermint_common.la \
-  $(top_srcdir)/src/util/libtalerutil.la \
-  $(top_srcdir)/src/pq/libtalerpq.la \
-  -lgnunetutil
-
-test_mint_db_postgres_SOURCES = \
-  test_mint_db.c
-test_mint_db_postgres_LDADD = \
-  libtalermint_common.la \
-  $(top_srcdir)/src/util/libtalerutil.la \
-  $(top_srcdir)/src/pq/libtalerpq.la \
-  -lgnunetutil -ljansson
-EXTRA_test_mint_db_postgres_DEPENDENCIES = \
-  libtaler_plugin_mintdb_postgres.la
diff --git a/src/mint/plugin.h b/src/mint/plugin.h
deleted file mode 100644
index 0dfb866da..000000000
--- a/src/mint/plugin.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2015 Christian Grothoff (and other contributing authors)
-
-  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, If not, see <http://www.gnu.org/licenses/>
-*/
-/**
- * @file mint/plugin.h
- * @brief Logic to load database plugins
- * @author Christian Grothoff
- */
-#ifndef PLUGIN_H
-#define PLUGIN_H
-
-#include <gnunet/gnunet_util_lib.h>
-#include "taler_mintdb_plugin.h"
-
-/**
- * Global variable with the plugin (once loaded).
- */
-extern struct TALER_MINTDB_Plugin *plugin;
-
-
-/**
- * Initialize the plugin.
- *
- * @param cfg configuration to use
- * @return #GNUNET_OK on success
- */
-int
-TALER_MINT_plugin_load (const struct GNUNET_CONFIGURATION_Handle *cfg);
-
-
-/**
- * Shutdown the plugin.
- */
-void
-TALER_MINT_plugin_unload (void);
-
-
-#endif
diff --git a/src/mint/taler-mint-httpd.c b/src/mint/taler-mint-httpd.c
index 13c77b033..a86735963 100644
--- a/src/mint/taler-mint-httpd.c
+++ b/src/mint/taler-mint-httpd.c
@@ -25,7 +25,6 @@
 #include <gnunet/gnunet_util_lib.h>
 #include <jansson.h>
 #include <microhttpd.h>
-#include <libpq-fe.h>
 #include <pthread.h>
 #include "taler_signatures.h"
 #include "taler_util.h"
@@ -36,7 +35,6 @@
 #include "taler-mint-httpd_refresh.h"
 #include "taler-mint-httpd_keystate.h"
 #include "taler_mintdb_plugin.h"
-#include "plugin.h"
 
 
 /**
@@ -61,6 +59,11 @@ struct GNUNET_CRYPTO_EddsaPublicKey TMH_master_public_key;
 char *TMH_expected_wire_format = "sepa";
 
 /**
+ * Our DB plugin.
+ */
+struct TALER_MINTDB_Plugin *TMH_plugin;
+
+/**
  * The HTTP Daemon.
  */
 static struct MHD_Daemon *mydaemon;
@@ -260,8 +263,8 @@ mint_serve_process_config (const char *mint_directory)
   }
   GNUNET_free (TMH_master_public_key_str);
 
-  if (GNUNET_OK !=
-      TALER_MINT_plugin_load (cfg))
+  if (NULL ==
+      (TMH_plugin = TALER_MINT_plugin_load (cfg)))
   {
     fprintf (stderr,
              "failed to initialize DB subsystem\n");
@@ -355,5 +358,6 @@ main (int argc, char *const *argv)
 
   ret = TMH_KS_loop ();
   MHD_stop_daemon (mydaemon);
+  TALER_MINT_plugin_unload (TMH_plugin);
   return (GNUNET_OK == ret) ? 0 : 1;
 }
diff --git a/src/mint/taler-mint-httpd.h b/src/mint/taler-mint-httpd.h
index 92ce54b84..11f2f3658 100644
--- a/src/mint/taler-mint-httpd.h
+++ b/src/mint/taler-mint-httpd.h
@@ -59,6 +59,11 @@ extern struct GNUNET_CRYPTO_EddsaPublicKey TMH_master_public_key;
  */
 extern struct GNUNET_CRYPTO_EddsaPrivateKey TMH_mint_private_signing_key;
 
+/**
+ * Our DB plugin.
+ */
+extern struct TALER_MINTDB_Plugin *TMH_plugin;
+
 
 /**
  * Struct describing an URL and the handler for it.
diff --git a/src/mint/taler-mint-httpd_db.c b/src/mint/taler-mint-httpd_db.c
index 2fdd87188..13fde7240 100644
--- a/src/mint/taler-mint-httpd_db.c
+++ b/src/mint/taler-mint-httpd_db.c
@@ -26,7 +26,7 @@
 #include "taler-mint-httpd_responses.h"
 #include "taler_util.h"
 #include "taler-mint-httpd_keystate.h"
-#include "plugin.h"
+#include "taler_mintdb_lib.h"
 
 
 /**
@@ -109,14 +109,14 @@ TMH_DB_execute_deposit (struct MHD_Connection *connection,
   struct TALER_DenominationKeyIssueInformation *dki;
   int ret;
 
-  if (NULL == (session = plugin->get_session (plugin->cls,
+  if (NULL == (session = TMH_plugin->get_session (TMH_plugin->cls,
                                               GNUNET_NO)))
   {
     GNUNET_break (0);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
   if (GNUNET_YES ==
-      plugin->have_deposit (plugin->cls,
+      TMH_plugin->have_deposit (TMH_plugin->cls,
                             session,
                             deposit))
   {
@@ -136,7 +136,7 @@ TMH_DB_execute_deposit (struct MHD_Connection *connection,
   TMH_KS_release (mks);
 
   if (GNUNET_OK !=
-      plugin->start (plugin->cls,
+      TMH_plugin->start (TMH_plugin->cls,
                      session))
   {
     GNUNET_break (0);
@@ -145,7 +145,7 @@ TMH_DB_execute_deposit (struct MHD_Connection *connection,
   /* fee for THIS transaction */
   spent = deposit->amount_with_fee;
   /* add cost of all previous transactions */
-  tl = plugin->get_coin_transactions (plugin->cls,
+  tl = TMH_plugin->get_coin_transactions (TMH_plugin->cls,
                                       session,
                                       &deposit->coin.coin_pub);
   if (GNUNET_OK !=
@@ -153,7 +153,7 @@ TMH_DB_execute_deposit (struct MHD_Connection *connection,
                                          &spent,
                                          &spent))
   {
-    plugin->free_coin_transaction_list (plugin->cls,
+    TMH_plugin->free_coin_transaction_list (TMH_plugin->cls,
                                         tl);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
@@ -162,30 +162,30 @@ TMH_DB_execute_deposit (struct MHD_Connection *connection,
   if (0 < TALER_amount_cmp (&spent,
                             &value))
   {
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     ret = TMH_RESPONSE_reply_deposit_insufficient_funds (connection,
                                                        tl);
-    plugin->free_coin_transaction_list (plugin->cls,
+    TMH_plugin->free_coin_transaction_list (TMH_plugin->cls,
                                         tl);
     return ret;
   }
-  plugin->free_coin_transaction_list (plugin->cls,
+  TMH_plugin->free_coin_transaction_list (TMH_plugin->cls,
                                       tl);
 
   if (GNUNET_OK !=
-      plugin->insert_deposit (plugin->cls,
+      TMH_plugin->insert_deposit (TMH_plugin->cls,
                               session,
                               deposit))
   {
     TALER_LOG_WARNING ("Failed to store /deposit information in database\n");
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
 
   if (GNUNET_OK !=
-      plugin->commit (plugin->cls,
+      TMH_plugin->commit (TMH_plugin->cls,
                       session))
   {
     TALER_LOG_WARNING ("/deposit transaction commit failed\n");
@@ -217,13 +217,13 @@ TMH_DB_execute_withdraw_status (struct MHD_Connection *connection,
   struct ReserveHistory *rh;
   int res;
 
-  if (NULL == (session = plugin->get_session (plugin->cls,
+  if (NULL == (session = TMH_plugin->get_session (TMH_plugin->cls,
                                               GNUNET_NO)))
   {
     GNUNET_break (0);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
-  rh = plugin->get_reserve_history (plugin->cls,
+  rh = TMH_plugin->get_reserve_history (TMH_plugin->cls,
                                     session,
                                     reserve_pub);
   if (NULL == rh)
@@ -233,7 +233,7 @@ TMH_DB_execute_withdraw_status (struct MHD_Connection *connection,
                                        "error", "Reserve not found");
   res = TMH_RESPONSE_reply_withdraw_status_success (connection,
                                                   rh);
-  plugin->free_reserve_history (plugin->cls,
+  TMH_plugin->free_reserve_history (TMH_plugin->cls,
                                 rh);
   return res;
 }
@@ -282,13 +282,13 @@ TMH_DB_execute_withdraw_sign (struct MHD_Connection *connection,
                       blinded_msg_len,
                       &h_blind);
 
-  if (NULL == (session = plugin->get_session (plugin->cls,
+  if (NULL == (session = TMH_plugin->get_session (TMH_plugin->cls,
                                               GNUNET_NO)))
   {
     GNUNET_break (0);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
-  res = plugin->get_collectable_blindcoin (plugin->cls,
+  res = TMH_plugin->get_collectable_blindcoin (TMH_plugin->cls,
                                            session,
                                            &h_blind,
                                            &collectable);
@@ -323,7 +323,7 @@ TMH_DB_execute_withdraw_sign (struct MHD_Connection *connection,
                                        "Denomination not found");
   }
   if (GNUNET_OK !=
-      plugin->start (plugin->cls,
+      TMH_plugin->start (TMH_plugin->cls,
                      session))
   {
     GNUNET_break (0);
@@ -331,12 +331,12 @@ TMH_DB_execute_withdraw_sign (struct MHD_Connection *connection,
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
 
-  rh = plugin->get_reserve_history (plugin->cls,
+  rh = TMH_plugin->get_reserve_history (TMH_plugin->cls,
                                     session,
                                     reserve);
   if (NULL == rh)
   {
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     TMH_KS_release (key_state);
     return TMH_RESPONSE_reply_json_pack (connection,
@@ -357,7 +357,7 @@ TMH_DB_execute_withdraw_sign (struct MHD_Connection *connection,
                         &value,
                         &fee_withdraw))
   {
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     TMH_KS_release (key_state);
     return TMH_RESPONSE_reply_internal_db_error (connection);
@@ -378,7 +378,7 @@ TMH_DB_execute_withdraw_sign (struct MHD_Connection *connection,
                               &deposit_total,
                               &pos->details.bank->amount))
         {
-          plugin->rollback (plugin->cls,
+          TMH_plugin->rollback (TMH_plugin->cls,
                             session);
           TMH_KS_release (key_state);
           return TMH_RESPONSE_reply_internal_db_error (connection);
@@ -398,7 +398,7 @@ TMH_DB_execute_withdraw_sign (struct MHD_Connection *connection,
                               &withdraw_total,
                               &value))
         {
-          plugin->rollback (plugin->cls,
+          TMH_plugin->rollback (TMH_plugin->cls,
                             session);
           TMH_KS_release (key_state);
           return TMH_RESPONSE_reply_internal_db_error (connection);
@@ -416,15 +416,15 @@ TMH_DB_execute_withdraw_sign (struct MHD_Connection *connection,
                             &balance))
   {
     TMH_KS_release (key_state);
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     res = TMH_RESPONSE_reply_withdraw_sign_insufficient_funds (connection,
                                                              rh);
-    plugin->free_reserve_history (plugin->cls,
+    TMH_plugin->free_reserve_history (TMH_plugin->cls,
                                   rh);
     return res;
   }
-  plugin->free_reserve_history (plugin->cls,
+  TMH_plugin->free_reserve_history (TMH_plugin->cls,
                                 rh);
 
   /* Balance is good, sign the coin! */
@@ -435,7 +435,7 @@ TMH_DB_execute_withdraw_sign (struct MHD_Connection *connection,
   if (NULL == sig)
   {
     GNUNET_break (0);
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     return TMH_RESPONSE_reply_internal_error (connection,
                                             "Internal error");
@@ -448,7 +448,7 @@ TMH_DB_execute_withdraw_sign (struct MHD_Connection *connection,
                       &collectable.h_coin_envelope);
   collectable.reserve_sig = *signature;
   if (GNUNET_OK !=
-      plugin->insert_collectable_blindcoin (plugin->cls,
+      TMH_plugin->insert_collectable_blindcoin (TMH_plugin->cls,
                                             session,
                                             &h_blind,
                                             amount_required,
@@ -456,12 +456,12 @@ TMH_DB_execute_withdraw_sign (struct MHD_Connection *connection,
   {
     GNUNET_break (0);
     GNUNET_CRYPTO_rsa_signature_free (sig);
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
   if (GNUNET_OK !=
-      plugin->commit (plugin->cls,
+      TMH_plugin->commit (TMH_plugin->cls,
                       session))
   {
     TALER_LOG_WARNING ("/withdraw/sign transaction commit failed\n");
@@ -523,7 +523,7 @@ refresh_accept_melts (struct MHD_Connection *connection,
   /* fee for THIS transaction; the melt amount includes the fee! */
   spent = coin_details->melt_amount_with_fee;
   /* add historic transaction costs of this coin */
-  tl = plugin->get_coin_transactions (plugin->cls,
+  tl = TMH_plugin->get_coin_transactions (TMH_plugin->cls,
                                       session,
                                       &coin_public_info->coin_pub);
   if (GNUNET_OK !=
@@ -532,7 +532,7 @@ refresh_accept_melts (struct MHD_Connection *connection,
                                          &spent))
   {
     GNUNET_break (0);
-    plugin->free_coin_transaction_list (plugin->cls,
+    TMH_plugin->free_coin_transaction_list (TMH_plugin->cls,
                                         tl);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
@@ -553,11 +553,11 @@ refresh_accept_melts (struct MHD_Connection *connection,
                                                              coin_details->melt_amount_with_fee,
                                                              coin_residual))
       ? GNUNET_NO : GNUNET_SYSERR;
-    plugin->free_coin_transaction_list (plugin->cls,
+    TMH_plugin->free_coin_transaction_list (TMH_plugin->cls,
                                         tl);
     return res;
   }
-  plugin->free_coin_transaction_list (plugin->cls,
+  TMH_plugin->free_coin_transaction_list (TMH_plugin->cls,
                                       tl);
 
   melt.coin = *coin_public_info;
@@ -565,7 +565,7 @@ refresh_accept_melts (struct MHD_Connection *connection,
   melt.session_hash = *session_hash;
   melt.amount_with_fee = coin_details->melt_amount_with_fee;
   if (GNUNET_OK !=
-      plugin->insert_refresh_melt (plugin->cls,
+      TMH_plugin->insert_refresh_melt (TMH_plugin->cls,
                                    session,
                                    oldcoin_index,
                                    &melt))
@@ -617,26 +617,26 @@ TMH_DB_execute_refresh_melt (struct MHD_Connection *connection,
   int res;
   unsigned int i;
 
-  if (NULL == (session = plugin->get_session (plugin->cls,
+  if (NULL == (session = TMH_plugin->get_session (TMH_plugin->cls,
                                               GNUNET_NO)))
   {
     GNUNET_break (0);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
   if (GNUNET_OK !=
-      plugin->start (plugin->cls,
+      TMH_plugin->start (TMH_plugin->cls,
                      session))
   {
     GNUNET_break (0);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
-  res = plugin->get_refresh_session (plugin->cls,
+  res = TMH_plugin->get_refresh_session (TMH_plugin->cls,
                                      session,
                                      session_hash,
                                      &refresh_session);
   if (GNUNET_YES == res)
   {
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     res = TMH_RESPONSE_reply_refresh_melt_success (connection,
                                                  session_hash,
@@ -645,7 +645,7 @@ TMH_DB_execute_refresh_melt (struct MHD_Connection *connection,
   }
   if (GNUNET_SYSERR == res)
   {
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
@@ -664,7 +664,7 @@ TMH_DB_execute_refresh_melt (struct MHD_Connection *connection,
                                      i)))
     {
       TMH_KS_release (key_state);
-      plugin->rollback (plugin->cls,
+      TMH_plugin->rollback (TMH_plugin->cls,
                         session);
       return (GNUNET_SYSERR == res) ? MHD_NO : MHD_YES;
     }
@@ -673,13 +673,13 @@ TMH_DB_execute_refresh_melt (struct MHD_Connection *connection,
 
   /* store requested new denominations */
   if (GNUNET_OK !=
-      plugin->insert_refresh_order (plugin->cls,
+      TMH_plugin->insert_refresh_order (TMH_plugin->cls,
                                     session,
                                     session_hash,
                                     num_new_denoms,
                                     denom_pubs))
   {
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
@@ -687,14 +687,14 @@ TMH_DB_execute_refresh_melt (struct MHD_Connection *connection,
   for (i = 0; i < TALER_CNC_KAPPA; i++)
   {
     if (GNUNET_OK !=
-        plugin->insert_refresh_commit_coins (plugin->cls,
+        TMH_plugin->insert_refresh_commit_coins (TMH_plugin->cls,
                                              session,
                                              session_hash,
                                              i,
                                              num_new_denoms,
                                              commit_coin[i]))
     {
-      plugin->rollback (plugin->cls,
+      TMH_plugin->rollback (TMH_plugin->cls,
                         session);
       return TMH_RESPONSE_reply_internal_db_error (connection);
     }
@@ -702,14 +702,14 @@ TMH_DB_execute_refresh_melt (struct MHD_Connection *connection,
   for (i = 0; i < TALER_CNC_KAPPA; i++)
   {
     if (GNUNET_OK !=
-        plugin->insert_refresh_commit_links (plugin->cls,
+        TMH_plugin->insert_refresh_commit_links (TMH_plugin->cls,
                                              session,
                                              session_hash,
                                              i,
                                              coin_count,
                                              commit_link[i]))
     {
-      plugin->rollback (plugin->cls,
+      TMH_plugin->rollback (TMH_plugin->cls,
                         session);
       return TMH_RESPONSE_reply_internal_db_error (connection);
     }
@@ -723,12 +723,12 @@ TMH_DB_execute_refresh_melt (struct MHD_Connection *connection,
     = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG,
                                 TALER_CNC_KAPPA);
   if (GNUNET_OK !=
-      (res = plugin->create_refresh_session (plugin->cls,
+      (res = TMH_plugin->create_refresh_session (TMH_plugin->cls,
                                              session,
                                              session_hash,
                                              &refresh_session)))
   {
-    plugin->rollback (plugin->cls,
+    TMH_plugin->rollback (TMH_plugin->cls,
                       session);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
@@ -736,7 +736,7 @@ TMH_DB_execute_refresh_melt (struct MHD_Connection *connection,
 
 
   if (GNUNET_OK !=
-      plugin->commit (plugin->cls,
+      TMH_plugin->commit (TMH_plugin->cls,
                       session))
   {
     TALER_LOG_WARNING ("/refresh/melt transaction commit failed\n");
@@ -789,7 +789,7 @@ check_commitment (struct MHD_Connection *connection,
   commit_links = GNUNET_malloc (num_oldcoins *
                                 sizeof (struct RefreshCommitLink));
   if (GNUNET_OK !=
-      plugin->get_refresh_commit_links (plugin->cls,
+      TMH_plugin->get_refresh_commit_links (TMH_plugin->cls,
                                         session,
                                         session_hash,
                                         off,
@@ -888,7 +888,7 @@ check_commitment (struct MHD_Connection *connection,
                                 sizeof (struct RefreshCommitCoin));
 
   if (GNUNET_OK !=
-      plugin->get_refresh_commit_coins (plugin->cls,
+      TMH_plugin->get_refresh_commit_coins (TMH_plugin->cls,
                                         session,
                                         session_hash,
                                         off,
@@ -1008,7 +1008,7 @@ refresh_mint_coin (struct MHD_Connection *connection,
     return ev_sig;
   }
   if (GNUNET_OK !=
-      plugin->insert_refresh_collectable (plugin->cls,
+      TMH_plugin->insert_refresh_collectable (TMH_plugin->cls,
                                           session,
                                           session_hash,
                                           coin_off,
@@ -1054,14 +1054,14 @@ TMH_DB_execute_refresh_reveal (struct MHD_Connection *connection,
   unsigned int j;
   unsigned int off;
 
-  if (NULL == (session = plugin->get_session (plugin->cls,
+  if (NULL == (session = TMH_plugin->get_session (TMH_plugin->cls,
                                               GNUNET_NO)))
   {
     GNUNET_break (0);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
 
-  res = plugin->get_refresh_session (plugin->cls,
+  res = TMH_plugin->get_refresh_session (TMH_plugin->cls,
                                      session,
                                      session_hash,
                                      &refresh_session);
@@ -1081,7 +1081,7 @@ TMH_DB_execute_refresh_reveal (struct MHD_Connection *connection,
   for (j=0;j<refresh_session.num_oldcoins;j++)
   {
     if (GNUNET_OK !=
-        plugin->get_refresh_melt (plugin->cls,
+        TMH_plugin->get_refresh_melt (TMH_plugin->cls,
                                   session,
                                   session_hash,
                                   j,
@@ -1095,7 +1095,7 @@ TMH_DB_execute_refresh_reveal (struct MHD_Connection *connection,
   denom_pubs = GNUNET_malloc (refresh_session.num_newcoins *
                               sizeof (struct TALER_DenominationPublicKey));
   if (GNUNET_OK !=
-      plugin->get_refresh_order (plugin->cls,
+      TMH_plugin->get_refresh_order (TMH_plugin->cls,
                                  session,
                                  session_hash,
                                  refresh_session.num_newcoins,
@@ -1136,7 +1136,7 @@ TMH_DB_execute_refresh_reveal (struct MHD_Connection *connection,
 
   /* Client request OK, start transaction */
   if (GNUNET_OK !=
-      plugin->start (plugin->cls,
+      TMH_plugin->start (TMH_plugin->cls,
                      session))
   {
     GNUNET_break (0);
@@ -1149,7 +1149,7 @@ TMH_DB_execute_refresh_reveal (struct MHD_Connection *connection,
   commit_coins = GNUNET_malloc (refresh_session.num_newcoins *
                                 sizeof (struct RefreshCommitCoin));
   if (GNUNET_OK !=
-      plugin->get_refresh_commit_coins (plugin->cls,
+      TMH_plugin->get_refresh_commit_coins (TMH_plugin->cls,
                                         session,
                                         session_hash,
                                         refresh_session.noreveal_index,
@@ -1195,7 +1195,7 @@ TMH_DB_execute_refresh_reveal (struct MHD_Connection *connection,
   GNUNET_free (commit_coins);
 
   if (GNUNET_OK !=
-      plugin->commit (plugin->cls,
+      TMH_plugin->commit (TMH_plugin->cls,
                       session))
   {
     TALER_LOG_WARNING ("/refresh/reveal transaction commit failed\n");
@@ -1234,13 +1234,13 @@ TMH_DB_execute_refresh_link (struct MHD_Connection *connection,
   struct TALER_EncryptedLinkSecretP shared_secret_enc;
   struct LinkDataList *ldl;
 
-  if (NULL == (session = plugin->get_session (plugin->cls,
+  if (NULL == (session = TMH_plugin->get_session (TMH_plugin->cls,
                                               GNUNET_NO)))
   {
     GNUNET_break (0);
     return TMH_RESPONSE_reply_internal_db_error (connection);
   }
-  res = plugin->get_transfer (plugin->cls,
+  res = TMH_plugin->get_transfer (TMH_plugin->cls,
                               session,
                               coin_pub,
                               &transfer_pub,
@@ -1260,7 +1260,7 @@ TMH_DB_execute_refresh_link (struct MHD_Connection *connection,
   }
   GNUNET_assert (GNUNET_OK == res);
 
-  ldl = plugin->get_link_data_list (plugin->cls,
+  ldl = TMH_plugin->get_link_data_list (TMH_plugin->cls,
                                     session,
                                     coin_pub);
   if (NULL == ldl)
@@ -1275,7 +1275,7 @@ TMH_DB_execute_refresh_link (struct MHD_Connection *connection,
                                                &transfer_pub,
                                                &shared_secret_enc,
                                                ldl);
-  plugin->free_link_data_list (plugin->cls,
+  TMH_plugin->free_link_data_list (TMH_plugin->cls,
                                ldl);
   return res;
 }
diff --git a/src/mint/taler-mint-httpd_db.h b/src/mint/taler-mint-httpd_db.h
index 44d11ffc9..3e8a7df7f 100644
--- a/src/mint/taler-mint-httpd_db.h
+++ b/src/mint/taler-mint-httpd_db.h
@@ -21,7 +21,6 @@
 #ifndef TALER_MINT_HTTPD_DB_H
 #define TALER_MINT_HTTPD_DB_H
 
-#include <libpq-fe.h>
 #include <microhttpd.h>
 #include <gnunet/gnunet_util_lib.h>
 #include "taler_util.h"
diff --git a/src/mint/taler-mint-httpd_deposit.c b/src/mint/taler-mint-httpd_deposit.c
index a1d64be45..ee2d24845 100644
--- a/src/mint/taler-mint-httpd_deposit.c
+++ b/src/mint/taler-mint-httpd_deposit.c
@@ -30,7 +30,6 @@
 #include <gnunet/gnunet_util_lib.h>
 #include <jansson.h>
 #include <microhttpd.h>
-#include <libpq-fe.h>
 #include <pthread.h>
 #include "taler_mintdb_plugin.h"
 #include "taler_signatures.h"
diff --git a/src/mint/taler-mint-httpd_keystate.h b/src/mint/taler-mint-httpd_keystate.h
index 4946ec1a3..26c9ccad6 100644
--- a/src/mint/taler-mint-httpd_keystate.h
+++ b/src/mint/taler-mint-httpd_keystate.h
@@ -26,7 +26,7 @@
 #include <gnunet/gnunet_util_lib.h>
 #include <microhttpd.h>
 #include "taler-mint-httpd.h"
-#include "key_io.h"
+#include "taler_mintdb_lib.h"
 
 
 /**
diff --git a/src/mint/taler-mint-httpd_mhd.c b/src/mint/taler-mint-httpd_mhd.c
index 934a2f9d2..a12158731 100644
--- a/src/mint/taler-mint-httpd_mhd.c
+++ b/src/mint/taler-mint-httpd_mhd.c
@@ -27,7 +27,6 @@
 #include <gnunet/gnunet_util_lib.h>
 #include <jansson.h>
 #include <microhttpd.h>
-#include <libpq-fe.h>
 #include <pthread.h>
 #include "taler-mint-httpd_responses.h"
 #include "taler-mint-httpd.h"
diff --git a/src/mintdb/Makefile.am b/src/mintdb/Makefile.am
new file mode 100644
index 000000000..ceaa2e210
--- /dev/null
+++ b/src/mintdb/Makefile.am
@@ -0,0 +1,68 @@
+# This Makefile.am is in the public domain
+AM_CPPFLAGS = -I$(top_srcdir)/src/include -I$(top_srcdir)/src/pq/ $(POSTGRESQL_CPPFLAGS)
+
+plugindir = $(libdir)/taler
+
+plugin_LTLIBRARIES = \
+  libtaler_plugin_mintdb_postgres.la
+
+EXTRA_DIST = plugin_mintdb_common.c
+
+libtaler_plugin_mintdb_postgres_la_SOURCES = \
+  plugin_mintdb_postgres.c
+libtaler_plugin_mintdb_postgres_la_LIBADD = \
+  $(LTLIBINTL)
+libtaler_plugin_mintdb_postgres_la_LDFLAGS = \
+  $(TALER_PLUGIN_LDFLAGS) \
+  -lpq \
+  -lgnunetutil
+
+lib_LTLIBRARIES = \
+  libtalermintdb.la
+
+libtalermintdb_la_SOURCES = \
+  mintdb_keyio.c \
+  mintdb_plugin.c
+
+libtalermintdb_la_LIBADD = \
+  $(top_builddir)/src/util/libtalerutil.la \
+  -lgnunetutil
+
+libtalermintdb_la_LDFLAGS = \
+  $(POSTGRESQL_LDFLAGS) \
+  -version-info 0:0:0 \
+  -no-undefined
+
+
+check_PROGRAMS = \
+  test-mintdb-deposits \
+  test-mintdb-keyio \
+  test-mintdb-postgres
+
+test_mintdb_deposits_SOURCES = \
+  test_mintdb_deposits.c
+test_mintdb_deposits_LDADD = \
+  libtalermintdb.la \
+  $(top_srcdir)/src/util/libtalerutil.la \
+  $(top_srcdir)/src/pq/libtalerpq.la \
+  -lgnunetutil \
+  -ljansson \
+  -lpq
+
+test_mintdb_keyio_SOURCES = \
+  test_mintdb_keyio.c
+test_mintdb_keyio_LDADD = \
+  libtalermintdb.la \
+  $(top_srcdir)/src/util/libtalerutil.la \
+  $(top_srcdir)/src/pq/libtalerpq.la \
+  -lgnunetutil
+
+test_mintdb_postgres_SOURCES = \
+  test_mintdb.c
+test_mintdb_postgres_LDADD = \
+  libtalermintdb.la \
+  $(top_srcdir)/src/util/libtalerutil.la \
+  $(top_srcdir)/src/pq/libtalerpq.la \
+  -lgnunetutil -ljansson
+EXTRA_test_mintdb_postgres_DEPENDENCIES = \
+  libtaler_plugin_mintdb_postgres.la
diff --git a/src/mint/key_io.c b/src/mintdb/mintdb_keyio.c
index 02d888d5d..321b890c3 100644
--- a/src/mint/key_io.c
+++ b/src/mintdb/mintdb_keyio.c
@@ -14,7 +14,7 @@
   TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
 */
 /**
- * @file mint/key_io.c
+ * @file mintdb/mintdb_keyio.c
  * @brief I/O operations for the Mint's private keys
  * @author Florian Dold
  * @author Benedikt Mueller
@@ -22,7 +22,7 @@
  * @author Christian Grothoff
  */
 #include "platform.h"
-#include "key_io.h"
+#include "taler_mintdb_lib.h"
 
 
 /**
diff --git a/src/mint/plugin.c b/src/mintdb/mintdb_plugin.c
index 147d4c4c7..b109ff3d1 100644
--- a/src/mint/plugin.c
+++ b/src/mintdb/mintdb_plugin.c
@@ -14,21 +14,17 @@
   TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
 */
 /**
- * @file mint/plugin.c
+ * @file mintdb/mintdb_plugin.c
  * @brief Logic to load database plugin
  * @author Christian Grothoff
  */
 #include "platform.h"
-#include "plugin.h"
+#include "taler_mintdb_lib.h"
+#include "taler_mintdb_plugin.h"
 #include <ltdl.h>
 
 
 /**
- * Global variable with the plugin (once loaded).
- */
-struct TALER_MINTDB_Plugin *plugin;
-
-/**
  * Libtool search path before we started.
  */
 static char *old_dlsearchpath;
@@ -40,15 +36,14 @@ static char *old_dlsearchpath;
  * @param cfg configuration to use
  * @return #GNUNET_OK on success
  */
-int
+struct TALER_MINTDB_Plugin *
 TALER_MINT_plugin_load (const struct GNUNET_CONFIGURATION_Handle *cfg)
 {
   char *plugin_name;
   char *lib_name;
   struct GNUNET_CONFIGURATION_Handle *cfg_dup;
+  struct TALER_MINTDB_Plugin *plugin;
 
-  if (NULL != plugin)
-    return GNUNET_OK;
   if (GNUNET_SYSERR ==
       GNUNET_CONFIGURATION_get_value_string (cfg,
                                              "mint",
@@ -58,7 +53,7 @@ TALER_MINT_plugin_load (const struct GNUNET_CONFIGURATION_Handle *cfg)
     GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                                "mint",
                                "db");
-    return GNUNET_SYSERR;
+    return NULL;
   }
   (void) GNUNET_asprintf (&lib_name,
                           "libtaler_plugin_mintdb_%s",
@@ -66,24 +61,31 @@ TALER_MINT_plugin_load (const struct GNUNET_CONFIGURATION_Handle *cfg)
   GNUNET_free (plugin_name);
   cfg_dup = GNUNET_CONFIGURATION_dup (cfg);
   plugin = GNUNET_PLUGIN_load (lib_name, cfg_dup);
+  if (NULL != plugin)
+    plugin->library_name = lib_name;
+  else
+    GNUNET_free (lib_name);
   GNUNET_CONFIGURATION_destroy (cfg_dup);
-  GNUNET_free (lib_name);
-  if (NULL == plugin)
-    return GNUNET_SYSERR;
-  return GNUNET_OK;
+  return plugin;
 }
 
 
 /**
  * Shutdown the plugin.
+ *
+ * @param plugin the plugin to unload
  */
 void
-TALER_MINT_plugin_unload ()
+TALER_MINT_plugin_unload (struct TALER_MINTDB_Plugin *plugin)
 {
+  char *lib_name;
+
   if (NULL == plugin)
     return;
-  GNUNET_assert (NULL == GNUNET_PLUGIN_unload (plugin->library_name,
+  lib_name = plugin->library_name;
+  GNUNET_assert (NULL == GNUNET_PLUGIN_unload (lib_name,
                                                plugin));
+  GNUNET_free (lib_name);
 }
 
 
diff --git a/src/mint/plugin_mintdb_common.c b/src/mintdb/plugin_mintdb_common.c
index a95cf4be2..a95cf4be2 100644
--- a/src/mint/plugin_mintdb_common.c
+++ b/src/mintdb/plugin_mintdb_common.c
diff --git a/src/mint/plugin_mintdb_postgres.c b/src/mintdb/plugin_mintdb_postgres.c
index 9846d1720..fa2c19db0 100644
--- a/src/mint/plugin_mintdb_postgres.c
+++ b/src/mintdb/plugin_mintdb_postgres.c
@@ -2299,7 +2299,6 @@ libtaler_plugin_mintdb_postgres_init (void *cls)
   }
   plugin = GNUNET_new (struct TALER_MINTDB_Plugin);
   plugin->cls = pg;
-  plugin->library_name = "libtaler_plugin_mintdb_postgres";
   plugin->get_session = &postgres_get_session;
   plugin->drop_temporary = &postgres_drop_temporary;
   plugin->create_tables = &postgres_create_tables;
diff --git a/src/mint/test_mint_db.c b/src/mintdb/test_mintdb.c
index a82094075..a82094075 100644
--- a/src/mint/test_mint_db.c
+++ b/src/mintdb/test_mintdb.c
diff --git a/src/mint/test_mint_deposits.c b/src/mintdb/test_mintdb_deposits.c
index dbe12e88d..dbe12e88d 100644
--- a/src/mint/test_mint_deposits.c
+++ b/src/mintdb/test_mintdb_deposits.c
diff --git a/src/mint/test_mint_common.c b/src/mintdb/test_mintdb_keyio.c
index 83df25046..83df25046 100644
--- a/src/mint/test_mint_common.c
+++ b/src/mintdb/test_mintdb_keyio.c