diff --git a/component/viewer/src/main/java/one/nem/lacerta/component/viewer/model/RevSelectListener.java b/component/viewer/src/main/java/one/nem/lacerta/component/viewer/model/RevSelectListener.java
new file mode 100644
index 00000000..f1a69486
--- /dev/null
+++ b/component/viewer/src/main/java/one/nem/lacerta/component/viewer/model/RevSelectListener.java
@@ -0,0 +1,5 @@
+package one.nem.lacerta.component.viewer.model;
+
+public interface RevSelectListener {
+    void onRevSelect(String revisionId);
+}