From 1731af3f29d21fc9ff69166c79391573c7a9a60e Mon Sep 17 00:00:00 2001
From: Mark Haines <mark.haines@matrix.org>
Date: Tue, 18 Nov 2014 16:44:52 +0000
Subject: [PATCH] SYN-104: When going backwards the end token should be before
 the last event

---
 synapse/storage/stream.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py
index 475e7f20a..a95402467 100644
--- a/synapse/storage/stream.py
+++ b/synapse/storage/stream.py
@@ -253,6 +253,9 @@ class StreamStore(SQLBaseStore):
         if rows:
             topo = rows[-1]["topological_ordering"]
             toke = rows[-1]["stream_ordering"]
+            if direction == 'b':
+                topo -= 1
+                toke -= 1
             next_token = "t%s-%s" % (topo, toke)
         else:
             # TODO (erikj): We should work out what to do here instead.