From d5eb39105e320d5d830f2df6e5f38c5385e4c5be Mon Sep 17 00:00:00 2001
From: Linus Nordberg <linus@nordberg.se>
Date: Mon, 21 Apr 2014 19:52:30 +0200
Subject: Add placeholder for audit_path/2.

---
 src/ht.erl | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/ht.erl b/src/ht.erl
index 97842bc..68c3c67 100644
--- a/src/ht.erl
+++ b/src/ht.erl
@@ -14,7 +14,8 @@
 -type inner() :: #inner{}.
 
 -export_type([head/0, tree/0, inner/0, leaf/0]).
--export([create/1, append/2, tree_hash/1, tree_version/1]).
+-export([create/1, append/2, tree_hash/1, tree_version/1,
+        audit_path/2]).
 
 %% Public interface.
 -spec create(iolist() | binary()) -> head().
@@ -71,6 +72,14 @@ append(Dest, Newtree, 0) when is_record(Dest, inner) ->
 append(Dest, Newtree, Depth) when is_record(Dest, inner) ->
     mkinner(Dest#inner.child0, append(Dest#inner.child1, Newtree, Depth - 1)).
 
+%% @doc return a list of those hashes needed to calculate the tree
+%% hash for Head given the knowledge of the hash in entry with number
+%% Index.
+-spec audit_path(head(), non_neg_integer()) -> list().
+audit_path(Head, Index) ->
+    [fixme, Head, Index].
+
+%%%%%%%%%%%%%%%%%%%%
 %% Private functions.
 
 -spec mkhead(non_neg_integer(), tree()) -> head();
-- 
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