diff --git a/app.go b/app.go
index b3ea930..9619bbd 100644
--- a/app.go
+++ b/app.go
@@ -3,7 +3,7 @@ package kit
 import (
 	"context"
 	"errors"
-	"fmt"
+	"git.diulo.com/mogfee/kit/core/logx"
 	_ "git.diulo.com/mogfee/kit/encoding/form"
 	_ "git.diulo.com/mogfee/kit/encoding/json"
 	_ "git.diulo.com/mogfee/kit/encoding/xml"
@@ -47,7 +47,6 @@ func New(opts ...Option) *App {
 	for _, opt := range opts {
 		opt(&o)
 	}
-	fmt.Println(o.id)
 	if o.logger != nil {
 		logx.SetLogger(o.logger)
 	}
diff --git a/options.go b/options.go
index 548e0b3..812459a 100644
--- a/options.go
+++ b/options.go
@@ -2,6 +2,7 @@ package kit
 
 import (
 	"context"
+	"git.diulo.com/mogfee/kit/core/logx"
 	"git.diulo.com/mogfee/kit/registry"
 	"git.diulo.com/mogfee/kit/transport"
 	"net/url"
diff --git a/transport/http/client.go b/transport/http/client.go
index 24760b9..bdc7c45 100644
--- a/transport/http/client.go
+++ b/transport/http/client.go
@@ -6,6 +6,7 @@ import (
 	"crypto/tls"
 	"fmt"
 	"git.diulo.com/mogfee/kit/encoding"
+	"git.diulo.com/mogfee/kit/errors"
 	"git.diulo.com/mogfee/kit/internal/host"
 	"git.diulo.com/mogfee/kit/internal/httputil"
 	"git.diulo.com/mogfee/kit/middleware"
@@ -259,7 +260,7 @@ func (client *Client) do(req *http.Request) (*http.Response, error) {
 			node selector.Node
 		)
 		if node, done, err = client.selector.Select(req.Context(), selector.WithNodeFilter(client.opts.nodeFilters...)); err != nil {
-			return nil, errorx.ServiceUnavailable("NODE_NOT_FOUND", err.Error())
+			return nil, errors.ServiceUnavailable("NODE_NOT_FOUND", err.Error())
 		}
 		if client.insecure {
 			req.URL.Scheme = "http"
@@ -306,13 +307,13 @@ func DefaultErrorDecoder(ctx context.Context, res *http.Response) error {
 	data, err := io.ReadAll(res.Body)
 	defer res.Body.Close()
 	if err == nil {
-		e := new(errorx.Error)
+		e := new(errors.Error)
 		if err = CodecForResponse(res).Unmarshal(data, e); err == nil {
 			e.Code = int32(res.StatusCode)
 			return e
 		}
 	}
-	return errorx.Newf(res.StatusCode, errorx.UnknownReason, "").WithCause(err)
+	return errors.Newf(res.StatusCode, errors.UnknownReason, "").WithCause(err)
 }
 func CodecForResponse(r *http.Response) encoding.Codec {
 	codec := encoding.GetCodec(httputil.ContentSubtype(r.Request.Header.Get("Content-Type")))
diff --git a/transport/http/codec.go b/transport/http/codec.go
index a67d893..3ad3ade 100644
--- a/transport/http/codec.go
+++ b/transport/http/codec.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"fmt"
 	"git.diulo.com/mogfee/kit/encoding"
+	"git.diulo.com/mogfee/kit/errors"
 	"git.diulo.com/mogfee/kit/internal/httputil"
 	"git.diulo.com/mogfee/kit/transport/http/binding"
 	"github.com/gorilla/mux"
@@ -38,18 +39,18 @@ func DefaultRequestQuery(r *http.Request, v any) error {
 func DefaultRequestDecoder(r *http.Request, v any) error {
 	codec, ok := CodeForRequest(r, "Content-Type")
 	if !ok {
-		return errorx.BadRequest("CODEC", fmt.Sprintf("unregister Content-Type: %s", codec))
+		return errors.BadRequest("CODEC", fmt.Sprintf("unregister Content-Type: %s", codec))
 	}
 	data, err := io.ReadAll(r.Body)
 	if err != nil {
-		return errorx.BadRequest("CODEC", err.Error())
+		return errors.BadRequest("CODEC", err.Error())
 	}
 	r.Body = io.NopCloser(bytes.NewBuffer(data))
 	if len(data) == 0 {
 		return nil
 	}
 	if err = codec.Unmarshal(data, v); err != nil {
-		return errorx.BadRequest("CODEC", err.Error())
+		return errors.BadRequest("CODEC", err.Error())
 	}
 	return nil
 }
@@ -72,7 +73,7 @@ func DefaultResponseEncoder(w http.ResponseWriter, r *http.Request, v any) error
 	return err
 }
 func DefaultErrorEncoder(w http.ResponseWriter, r *http.Request, err error) {
-	se := errorx.FromError(err)
+	se := errors.FromError(err)
 	codec, _ := CodeForRequest(r, "Accept")
 	body, err := codec.Marshal(se)
 	if err != nil {
diff --git a/transport/http/server.go b/transport/http/server.go
index 6e6bce8..cf5a39a 100644
--- a/transport/http/server.go
+++ b/transport/http/server.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"crypto/tls"
 	"errors"
+	"git.diulo.com/mogfee/kit/core/logx"
 	"git.diulo.com/mogfee/kit/internal/endpoint"
 	"git.diulo.com/mogfee/kit/internal/host"
 	"git.diulo.com/mogfee/kit/internal/matcher"