add libtool_version.ml

src/http_info.ml

@@ -20,8 +20,15 @@ let config req _server _env =
   let res = Api.encode Api.ExchangeVersionResponse.jsont config in
   Respond.result res req
 
+(* not implemented:
+     - kyc
+     - wads
+     - account limits
+     - zero limited operations
+     - recoup
+     - extensions *)
 let mk_keys ~db_conn (module Keys : Keys.S) ~last_issue_date =
-  let version = Api.protocol_version in
+  let version = Libtool_version.mte_protocol_version in
   let base_url = Config.base_url in
   let currency = Config.currency in
   let shopping_url = Config.shopping_url in