diff --git a/lsdb/Lsdb.go b/lsdb/Lsdb.go
index 3ea8661..d99c15c 100644
--- a/lsdb/Lsdb.go
+++ b/lsdb/Lsdb.go
@@ -80,7 +80,7 @@ func (l *Lsdb) BuildAndInstallOwnNameLsa() {
 //  @receiver l
 //
 func (l *Lsdb) BuildAndInstallOwnCoordinateLsa() {
-	panic("implement me")
+	// todo
 }
 
 //
@@ -134,11 +134,12 @@ func (l *Lsdb) GetSync() *communication.SyncLogicHandler {
 //  @receiver l*
 //  @param routerIdentifier
 //  @param lsaType
-//  @return *lsa.ILsa
+//  @return lsa.ILsa
 //
 func (l *Lsdb) FindLsa(routerIdentifier *component.Identifier,
 	lsaType lsa.LsaType) lsa.ILsa {
-	panic("")
+	// todo
+	return &lsa.NameLsa{}
 }
 
 //
@@ -159,7 +160,7 @@ func (l *Lsdb) IsLsaNew(routerIdentifier *component.Identifier,
 	return true
 }
 
-func (l *Lsdb) InstallLsa(lsa *lsa.ILsa)  {
+func (l *Lsdb) InstallLsa(lsa lsa.ILsa)  {
 }
 
 func (l* Lsdb) RemoveLsa(routerIdentifier *component.Identifier,
@@ -191,11 +192,11 @@ func (l *Lsdb) BuildAndInstallOwnAdjLsa()  {
 //  @Description: 在调度器中安排一个刷新或过期事件
 //  @receiver l
 //
-func (l *Lsdb) ScheduleLsaExpiration(lsa *lsa.ILsa,duration *time.Duration)  {
+func (l *Lsdb) ScheduleLsaExpiration(lsa lsa.ILsa,duration *time.Duration)  {
 
 }
 
-func (l* Lsdb) ExpireOrRefreshLsa(lsa *lsa.ILsa)  {
+func (l* Lsdb) ExpireOrRefreshLsa(lsa lsa.ILsa)  {
 }
 
 func (l *Lsdb) ProcessInterestForLsa(interest *packet.Interest,
@@ -236,6 +237,7 @@ func (l *Lsdb) AfterFetchLsa(buffer bytes.Buffer,interestName *component.Identif
 }
 
 func (l *Lsdb) getLsaExpirationTimePoint() time.Time {
-	panic("")
+	// todo
+	return time.Time{}
 }