1 files changed, 1 insertions, 0 deletions

diff --git a/core/state_backend.go b/core/state_backend.go
index ae9fe1d..cc7e90c 100644
--- a/core/state_backend.go
+++ b/core/state_backend.go
@@ -15,6 +15,7 @@ type StateBackend interface {
         GetCurrentKey() string
         SetCurrentNamespace(namespace any) error
         GetCurrentNamespace() any
+        Snapshot(checkpointID uint64, targetDir string) error
 
         // For User ===
         // GetValueState will perform in disk