From 3406cf78b48a6b6860e16cfc9449a3490cd5c0b7 Mon Sep 17 00:00:00 2001
From: SChernykh <sergey.v.chernykh@gmail.com>
Date: Wed, 11 May 2022 15:07:54 +0200
Subject: [PATCH] Don't return stale chain tip to other peers

---
 src/side_chain.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/side_chain.cpp b/src/side_chain.cpp
index a127228..62ea654 100644
--- a/src/side_chain.cpp
+++ b/src/side_chain.cpp
@@ -584,8 +584,13 @@ bool SideChain::get_block_blob(const hash& id, std::vector<uint8_t>& blob)
 	const PoolBlock* block = nullptr;
 
 	// Empty hash means we return current sidechain tip
-	if (id == hash()) {
+	if (id.empty()) {
 		block = m_chainTip;
+
+		// Don't return stale chain tip
+		if (block && (block->m_txinGenHeight + 2 < m_pool->miner_data().height)) {
+			return false;
+		}
 	}
 	else {
 		auto it = m_blocksById.find(id);