From f1383740274a46a9a02f77f5d279f46daa122fae Mon Sep 17 00:00:00 2001
From: Felix Lange <fjl@twurst.com>
Date: Sun, 4 Dec 2016 19:43:59 +0100
Subject: [PATCH] ethereum: document use of Removed field for
 SubscribeFilterLogs

---
 interfaces.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/interfaces.go b/interfaces.go
index 5e38a90546..bbb204ff23 100644
--- a/interfaces.go
+++ b/interfaces.go
@@ -152,6 +152,9 @@ type FilterQuery struct {
 
 // LogFilterer provides access to contract log events using a one-off query or continuous
 // event subscription.
+//
+// Logs received through a streaming query subscription may have Removed set to true,
+// indicating that the log was reverted due to a chain reorganisation.
 type LogFilterer interface {
 	FilterLogs(ctx context.Context, q FilterQuery) ([]vm.Log, error)
 	SubscribeFilterLogs(ctx context.Context, q FilterQuery, ch chan<- vm.Log) (Subscription, error)