From c2ea6d1b65192983bdcee6f0db7cbfed053c9db8 Mon Sep 17 00:00:00 2001
From: joeywang4 <b05901143@ntu.edu.tw>
Date: Wed, 13 Oct 2021 14:27:27 +0800
Subject: [PATCH] Ensure proposals are from the real proposer

---
 src/hotstuff.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/hotstuff.cpp b/src/hotstuff.cpp
index 591397c4..67632644 100644
--- a/src/hotstuff.cpp
+++ b/src/hotstuff.cpp
@@ -211,6 +211,11 @@ void HotStuffBase::propose_handler(MsgPropose &&msg, const Net::conn_t &conn) {
         LOG_WARN("invalid proposal from %d", prop.proposer);
         return;
     }
+    if (prop.proposer != pmaker->get_proposer())
+    {
+        LOG_WARN("received proposal from %d who is not the proposer", prop.proposer);
+        return;
+    }
     promise::all(std::vector<promise_t>{
         async_deliver_blk(blk->get_hash(), peer)
     }).then([this, prop = std::move(prop)]() {