WiP: added auction_brandt as extension

- added an extension to handle auctions via libbrandt
  - /extensions/auction_brandt GET and POST handler defined
  - initial parsing of transcript.json implemented, yet WiP

- multiple cleanups and changes to extension handling

1 files changed, 9 insertions, 4 deletions

diff --git a/src/exchange/taler-exchange-httpd_keys.c b/src/exchange/taler-exchange-httpd_keys.c
index 4fb8a717..4761f314 100644
--- a/src/exchange/taler-exchange-httpd_keys.c
+++ b/src/exchange/taler-exchange-httpd_keys.c
@@ -1916,18 +1916,23 @@ create_krd (struct TEH_KeyStateHandle *ksh,
 
       /* flag our findings so far */
       has_extensions = true;
-      GNUNET_assert (NULL != extension->config_json);
 
       ext = GNUNET_JSON_PACK (
         GNUNET_JSON_pack_bool ("critical",
                                extension->critical),
         GNUNET_JSON_pack_string ("version",
-                                 extension->version),
-        GNUNET_JSON_pack_object_incref ("config",
-                                        extension->config_json)
+                                 extension->version)
         );
       GNUNET_assert (NULL != ext);
 
+      if (extension->has_config)
+      {
+        GNUNET_assert (extension->config_json);
+        json_object_set_new (ext,
+                             "config",
+                             extension->config_json);
+      }
+
       r = json_object_set_new (
         extensions,
         extension->name,