--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hgext/infinitepush/indexapi.py	Fri Feb 09 13:39:15 2018 +0530
@@ -0,0 +1,70 @@
+# Infinite push
+#
+# Copyright 2016 Facebook, Inc.
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2 or any later version.
+
+from __future__ import absolute_import
+
+class indexapi(object):
+    """Class that manages access to infinitepush index.
+
+    This class is a context manager and all write operations (like
+    deletebookmarks, addbookmark etc) should use `with` statement:
+
+      with index:
+          index.deletebookmarks(...)
+          ...
+    """
+
+    def __init__(self):
+        """Initializes the metadata store connection."""
+
+    def close(self):
+        """Cleans up the metadata store connection."""
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        pass
+
+    def addbundle(self, bundleid, nodesctx):
+        """Takes a bundleid and a list of node contexts for each node
+        in that bundle and records that."""
+        raise NotImplementedError()
+
+    def addbookmark(self, bookmark, node):
+        """Takes a bookmark name and hash, and records mapping in the metadata
+        store."""
+        raise NotImplementedError()
+
+    def addmanybookmarks(self, bookmarks):
+        """Takes a dict with mapping from bookmark to hash and records mapping
+        in the metadata store."""
+        raise NotImplementedError()
+
+    def deletebookmarks(self, patterns):
+        """Accepts list of bookmarks and deletes them.
+        """
+        raise NotImplementedError()
+
+    def getbundle(self, node):
+        """Returns the bundleid for the bundle that contains the given node."""
+        raise NotImplementedError()
+
+    def getnode(self, bookmark):
+        """Returns the node for the given bookmark. None if it doesn't exist."""
+        raise NotImplementedError()
+
+    def getbookmarks(self, query):
+        """Returns bookmarks that match the query"""
+        raise NotImplementedError()
+
+    def saveoptionaljsonmetadata(self, node, jsonmetadata):
+        """Saves optional metadata for a given node"""
+        raise NotImplementedError()
+
+class indexexception(Exception):
+    pass