diff --git a/api/api.proto b/api/api.proto
index f52cf7b3dd1..5d5e810f75e 100644
--- a/api/api.proto
+++ b/api/api.proto
@@ -74,6 +74,9 @@ service Wallet {
   }
   rpc GetBlockByNum (NumberMessage) returns (Block) {
 
+  }
+  rpc TotalTransaction (EmptyMessage) returns (NumberMessage) {
+
   }
 };
 // the api of tron's db