diff --git a/runelite-api/src/main/java/net/runelite/api/AbstractArchive.java b/runelite-api/src/main/java/net/runelite/api/AbstractArchive.java
new file mode 100644
index 0000000000..0be27dfa46
--- /dev/null
+++ b/runelite-api/src/main/java/net/runelite/api/AbstractArchive.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2020, Noodleeater <noodleeater4@gmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.runelite.api;
+
+/**
+ * Represents an archive of data, which is ordered into "groups" of "files".
+ */
+public interface AbstractArchive extends IndexDataBase
+{
+	/**
+	 * the methods bellow are usefull for reading byte data from the cache
+	 */
+	int getGroupCount();
+
+	byte[] getConfigData(int archiveId, int fileId);
+
+	int[] getFileIds(int groupId);
+
+	int[][] getFileIds();
+
+	byte[] getFile(int groupId, int fileId);
+
+	int getGroupFileCount(int groupId);
+
+	int[] getFileCounts();
+}
diff --git a/runescape-api/src/main/java/net/runelite/rs/api/RSAbstractArchive.java b/runescape-api/src/main/java/net/runelite/rs/api/RSAbstractArchive.java
index fe3f6c7003..bddfbe6f71 100644
--- a/runescape-api/src/main/java/net/runelite/rs/api/RSAbstractArchive.java
+++ b/runescape-api/src/main/java/net/runelite/rs/api/RSAbstractArchive.java
@@ -1,14 +1,36 @@
 package net.runelite.rs.api;
 
+import net.runelite.api.AbstractArchive;
 import net.runelite.api.IndexDataBase;
 import net.runelite.mapping.Import;
 
-public interface RSAbstractArchive extends IndexDataBase
+public interface RSAbstractArchive extends IndexDataBase, AbstractArchive
 {
 	@Import("takeFile")
+	@Override
 	byte[] getConfigData(int archiveId, int fileId);
 
 	@Import("getGroupFileIds")
 	@Override
-	int[] getFileIds(int group);
+	int[] getFileIds(int groupId);
+
+	@Import("groupCount")
+	@Override
+	int getGroupCount();
+
+	@Import("fileIds")
+	@Override
+	int[][] getFileIds();
+
+	@Import("getFile")
+	@Override
+	byte[] getFile(int groupId, int fileId);
+
+	@Import("getGroupFileCount")
+	@Override
+	int getGroupFileCount(int groupId);
+
+	@Import("fileCounts")
+	@Override
+	int[] getFileCounts();
 }