From 94ec62c544520084e6336c39a8fb6a4c5e7bdfbb Mon Sep 17 00:00:00 2001
From: "mark.lin" <mark@maicoin.com>
Date: Tue, 12 Sep 2017 10:55:02 +0800
Subject: [PATCH] consensus: add Istanbul consensus engine interface

---
 consensus/consensus.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/consensus/consensus.go b/consensus/consensus.go
index 1e013d5d4c..87228ae49d 100644
--- a/consensus/consensus.go
+++ b/consensus/consensus.go
@@ -120,3 +120,14 @@ type PoW interface {
 	// Hashrate returns the current mining hashrate of a PoW consensus engine.
 	Hashrate() float64
 }
+
+// Istanbul is a consensus engine to avoid byzantine failure
+type Istanbul interface {
+	Engine
+
+	// Start starts the engine
+	Start(chain ChainReader, currentBlock func() *types.Block, hasBadBlock func(hash common.Hash) bool) error
+
+	// Stop stops the engine
+	Stop() error
+}