diff --git a/core/errorx/wrap.go b/core/errorx/wrap.go
new file mode 100644
index 00000000..f4c7da66
--- /dev/null
+++ b/core/errorx/wrap.go
@@ -0,0 +1,21 @@
+package errorx
+
+import "fmt"
+
+// Wrap returns an error that wraps err with given message.
+func Wrap(err error, message string) error {
+	if err == nil {
+		return nil
+	}
+
+	return fmt.Errorf("%s: %w", message, err)
+}
+
+// Wrapf returns an error that wraps err with given format and args.
+func Wrapf(err error, format string, args ...interface{}) error {
+	if err == nil {
+		return nil
+	}
+
+	return fmt.Errorf("%s: %w", fmt.Sprintf(format, args...), err)
+}
diff --git a/core/errorx/wrap_test.go b/core/errorx/wrap_test.go
new file mode 100644
index 00000000..088bc378
--- /dev/null
+++ b/core/errorx/wrap_test.go
@@ -0,0 +1,18 @@
+package errorx
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestWrap(t *testing.T) {
+	assert.Nil(t, Wrap(nil, "test"))
+	assert.Equal(t, "foo: bar", Wrap(errors.New("bar"), "foo").Error())
+}
+
+func TestWrapf(t *testing.T) {
+	assert.Nil(t, Wrapf(nil, "%s", "test"))
+	assert.Equal(t, "foo bar: quz", Wrapf(errors.New("quz"), "foo %s", "bar").Error())
+}
diff --git a/gateway/config.go b/gateway/config.go
new file mode 100644
index 00000000..133ebbb7
--- /dev/null
+++ b/gateway/config.go
@@ -0,0 +1,7 @@
+package gateway
+
+import "github.com/zeromicro/go-zero/rest"
+
+type GatewayConf struct {
+	rest.RestConf
+}
diff --git a/gateway/server.go b/gateway/server.go
new file mode 100644
index 00000000..8cdb1f96
--- /dev/null
+++ b/gateway/server.go
@@ -0,0 +1,6 @@
+package gateway
+
+type Server struct {
+}
+
+func MustNewServer() {}