New error code for a unknown reserve public key.

Specific to the /reserve/status API.

src/exchange/taler-exchange-httpd_reserve_status.c

@@ -154,9 +154,10 @@ TEH_RESERVE_handler_reserve_status (struct TEH_RequestHandler *rh,
   if (NULL == rsc.rh)
     return TEH_RESPONSE_reply_json_pack (connection,
                                          MHD_HTTP_NOT_FOUND,
-                                         "{s:s, s:s}",
+                                         "{s:s, s:s, s:I}",
                                          "error", "Reserve not found",
-                                         "parameter", "withdraw_pub");
+                                         "parameter", "withdraw_pub",
+                                         "code", (json_int_t) TALER_EC_RESERVE_STATUS_UNKNOWN);
   mhd_ret = reply_reserve_status_success (connection,
 					  rsc.rh);
   TEH_plugin->free_reserve_history (TEH_plugin->cls,

src/include/taler_error_codes.h

@@ -299,6 +299,12 @@ enum TALER_ErrorCode
    */
   TALER_EC_RESERVE_STATUS_DB_ERROR = 1150,
 
+  /**
+   * The reserve status was requested using a unknown key,
+   * to be returned with 404 Not Found.
+   */
+  TALER_EC_RESERVE_STATUS_UNKNOWN = 1151,
+
 
   /**
    * The respective coin did not have sufficient residual value

src/json/json.c

@@ -80,6 +80,4 @@ TALER_JSON_get_error_code (const json_t *json)
   return TALER_EC_INVALID;
 }
 
-
-
 /* End of json/json.c */