diff --git a/sdk-go/go.mod b/sdk-go/go.mod
index b3dd286..71dd786 100644
--- a/sdk-go/go.mod
+++ b/sdk-go/go.mod
@@ -2,4 +2,4 @@ module go.fusiongalaxy.cn/bdware/bdcontract-client
 
 go 1.23
 
-require github.com/tjfoc/gmsm v1.4.1 // indirect
+require github.com/tjfoc/gmsm v1.4.1
diff --git a/sdk-go/main.go b/sdk-go/main.go
deleted file mode 100644
index e69de29..0000000