diff --git a/external/cmn/sp_client.go b/external/cmn/sp_client.go
index f9eb203..15cbb06 100644
--- a/external/cmn/sp_client.go
+++ b/external/cmn/sp_client.go
@@ -3,6 +3,7 @@ package cmn
 import (
 	"context"
 	"encoding/xml"
+	"io"
 	"net/http"
 	"strconv"
 	"strings"
@@ -61,3 +62,19 @@ func (c *SPClient) GetBucketReadQuota(ctx context.Context, bucketName string) (Q
 	}
 	return QuotaResult, nil
 }
+
+func (c *SPClient) GetBundleObject(ctx context.Context, bucketName, objectName string) (io.ReadCloser, error) {
+	var urlStr string
+	parts := strings.Split(c.host, "//")
+	urlStr = parts[0] + "//" + bucketName + "." + parts[1] + "/" + objectName
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, urlStr, nil)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := c.hc.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	return resp.Body, nil
+}
diff --git a/syncer/syncer.go b/syncer/syncer.go
index 589040c..b5b6a36 100644
--- a/syncer/syncer.go
+++ b/syncer/syncer.go
@@ -154,7 +154,7 @@ func (s *BlobSyncer) sync() error {
 		var latestBlockResp *structs.GetBlockV2Response
 		block, err = s.client.GetBeaconBlock(ctx, blockID)
 		if err != nil {
-			if err != eth.ErrBlockNotFound {
+			if !errors.Is(err, eth.ErrBlockNotFound) {
 				return err
 			}
 			// Both try to get forked block and non-exist block will return 404. When the response is ErrBlockNotFound,
@@ -217,7 +217,7 @@ func (s *BlobSyncer) sync() error {
 		dbErr = err
 	}
 	if dbErr != nil {
-		logging.Logger.Errorf("failed to save block(h=%d) to DB, err=%s", blockID, err.Error())
+		logging.Logger.Errorf("failed to save block(h=%d) to DB, err=%s", blockID, dbErr.Error())
 		return dbErr
 	}
 	if blockID == s.bundleDetail.finalizeBlockID {