-fix api call

src/exchange/taler-exchange-httpd_extensions.c

@@ -171,6 +171,7 @@ extension_update_event_cb (void *cls,
   // Get the config from the database as string
   {
     char *config_str;
+    struct TALER_MasterSignatureP config_sig; // ignored
     enum GNUNET_DB_QueryStatus qs;
     struct TALER_Extension *extension;
     json_error_t err;
@@ -182,7 +183,8 @@ extension_update_event_cb (void *cls,
 
     qs = TEH_plugin->get_extension_config (TEH_plugin->cls,
                                            extension->name,
-                                           &config_str);
+                                           &config_str,
+                                           &config_sig);
 
     if (qs < 0)
     {

src/exchangedb/plugin_exchangedb_postgres.c

@@ -2753,8 +2753,11 @@ prepare_statements (struct PostgresClosure *pg)
     /* Used in #postgres_get_extension_config */
     GNUNET_PQ_make_prepare (
       "get_extension_config",
-      "SELECT (config) FROM extensions"
-      " WHERE name=$1;",
+      "SELECT "
+      " config, "
+      " config_sig "
+      "FROM extensions"
+      "   WHERE name=$1;",
       1),
     GNUNET_PQ_PREPARED_STATEMENT_END
   };
@@ -11446,7 +11449,8 @@ postgres_set_extension_config (void *cls,
 enum GNUNET_DB_QueryStatus
 postgres_get_extension_config (void *cls,
                                const char *extension_name,
-                               char **config)
+                               char **config,
+                               struct TALER_MasterSignatureP *config_sig)
 {
   struct PostgresClosure *pg = cls;
   struct GNUNET_PQ_QueryParam params[] = {
@@ -11455,6 +11459,7 @@ postgres_get_extension_config (void *cls,
   };
   struct GNUNET_PQ_ResultSpec rs[] = {
     GNUNET_PQ_result_spec_string ("config", config),
+    GNUNET_PQ_result_spec_auto_from_type ("config_sig", config_sig),
     GNUNET_PQ_result_spec_end
   };
 

src/exchangedb/test_exchangedb.c

@@ -108,6 +108,49 @@ mark_prepare_cb (void *cls,
 }
 
 
+/**
+ * Simple check that config retrieval and setting for extensions work
+ */
+static enum GNUNET_GenericReturnValue
+test_extension_config (void)
+{
+  char *config;
+  struct TALER_MasterSignatureP sig;
+
+  memset (&sig, 0x42, sizeof(sig));
+
+  FAILIF (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS !=
+          plugin->get_extension_config (plugin->cls,
+                                        "fnord",
+                                        &config,
+                                        &sig));
+
+  sig.eddsa_signature.r[23] = 0x23;
+
+  FAILIF (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT !=
+          plugin->set_extension_config (plugin->cls,
+                                        "fnord",
+                                        "bar",
+                                        &sig));
+
+  memset (&sig, 0, sizeof(sig));
+
+  FAILIF (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT !=
+          plugin->get_extension_config (plugin->cls,
+                                        "fnord",
+                                        &config,
+                                        &sig));
+
+  FAILIF (0 != strcmp ("bar", config));
+
+  FAILIF (0x23 != sig.eddsa_signature.r[23]);
+
+  return GNUNET_OK;
+drop:
+  return GNUNET_SYSERR;
+}
+
+
 /**
  * Test API relating to persisting the wire plugins preparation data.
  *
@@ -1334,6 +1377,10 @@ run (void *cls)
                                                  0,
                                                  &recoup_cb,
                                                  NULL));
+  /* simple extension check */
+  FAILIF (GNUNET_OK !=
+          test_extension_config ());
+
   RND_BLK (&reserve_pub);
   GNUNET_assert (GNUNET_OK ==
                  TALER_string_to_amount (CURRENCY ":1.000010",

src/include/taler_exchangedb_plugin.h

@@ -4049,7 +4049,8 @@ struct TALER_EXCHANGEDB_Plugin
   enum GNUNET_DB_QueryStatus
   (*get_extension_config)(void *cls,
                           const char *extension_name,
-                          char **config);
+                          char **config,
+                          struct TALER_MasterSignatureP *config_sig);
 
 };