fix #4851

src/exchange/taler-exchange-httpd.c

@@ -624,10 +624,6 @@ exchange_serve_process_config ()
              (unsigned int) TALER_CURRENCY_LEN);
     return GNUNET_SYSERR;
   }
-  if (GNUNET_OK !=
-      TEH_VALIDATION_init (cfg))
-    return GNUNET_SYSERR;
-
   if (GNUNET_OK !=
       GNUNET_CONFIGURATION_get_value_string (cfg,
                                              "exchange",
@@ -637,7 +633,6 @@ exchange_serve_process_config ()
     GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                                "exchange",
                                "master_public_key");
-    TEH_VALIDATION_done ();
     return GNUNET_SYSERR;
   }
   if (GNUNET_OK !=
@@ -648,11 +643,17 @@ exchange_serve_process_config ()
     fprintf (stderr,
              "Invalid master public key given in exchange configuration.");
     GNUNET_free (TEH_master_public_key_str);
-    TEH_VALIDATION_done ();
     return GNUNET_SYSERR;
   }
   GNUNET_free (TEH_master_public_key_str);
 
+  if ( (GNUNET_OK !=
+        TEH_VALIDATION_init (cfg)) ||
+       (GNUNET_OK !=
+        TEH_WIRE_init ()) )
+    return GNUNET_SYSERR;
+
+
   if (NULL ==
       (TEH_plugin = TALER_EXCHANGEDB_plugin_load (cfg)))
   {

src/exchange/taler-exchange-httpd_wire.c

@@ -120,15 +120,34 @@ TEH_WIRE_handler_wire (struct TEH_RequestHandler *rh,
                        const char *upload_data,
                        size_t *upload_data_size)
 {
-  if (NULL == wire_methods)
-    wire_methods = TEH_VALIDATION_get_wire_methods ("exchange-wire-incoming");
-
+  GNUNET_assert (NULL != wire_methods);
   return TEH_RESPONSE_reply_json (connection,
                                   wire_methods,
                                   MHD_HTTP_OK);
 }
 
 
+/**
+ * Initialize wire subsystem.
+ *
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR if we found no valid
+ *         wire methods
+ */
+int
+TEH_WIRE_init ()
+{
+  wire_methods = TEH_VALIDATION_get_wire_methods ("exchange-wire-incoming");
+  if ( (NULL == wire_methods) ||
+       (0 == json_object_size (wire_methods)) )
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Failed to find properly configured wire transfer method\n");
+    return GNUNET_SYSERR;
+  }
+  return GNUNET_OK;
+}
+
+
 /**
  * Initialize libgcrypt.
  */

src/exchange/taler-exchange-httpd_wire.h

@@ -26,6 +26,16 @@
 #include "taler-exchange-httpd.h"
 
 
+/**
+ * Initialize wire subsystem.
+ *
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR if we found no valid
+ *         wire methods
+ */
+int
+TEH_WIRE_init (void);
+
+
 /**
  * Obtain fee structure for @a wire_plugin_name wire transfers.
  *