diff --git a/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java b/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java
index 1e24a762..214a0813 100644
--- a/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java
+++ b/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java
@@ -1,4 +1,21 @@
 package one.nem.lacerta.data;
 
+import java.util.ArrayList;
+
+import one.nem.lacerta.model.ListItem;
+import one.nem.lacerta.model.ListItemType;
+
 public interface LacertaLibrary {
+
+    // Get History
+
+    ArrayList<ListItem> getRecentDocument(int limit);
+    ArrayList<ListItem> getRecentDocument(int limit, int offset);
+    ArrayList<ListItem> getRecentDocument(int limit, int offset, ListItemType type);
+
+    // Get List
+
+    ArrayList<ListItem> getDocumentList(int limit);
+
+
 }