From fa8e1025f5f9fc827b2436a1544f943cd4f9411c Mon Sep 17 00:00:00 2001
From: Daniel Sanchez <sanchez.quiros.daniel@gmail.com>
Date: Thu, 3 Aug 2023 12:25:33 +0200
Subject: [PATCH] Fix: genesis pruning in engine (#289)

* Do not prune genesis

* Fix retain condition
---
 consensus-engine/src/lib.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/consensus-engine/src/lib.rs b/consensus-engine/src/lib.rs
index 371c8c26..5d6b8f1b 100644
--- a/consensus-engine/src/lib.rs
+++ b/consensus-engine/src/lib.rs
@@ -400,7 +400,10 @@ impl<O: Overlay> Carnot<O> {
     /// Blocks newer than the last committed block are not safe to be pruned
     pub fn prune_older_blocks_by_view(&mut self, threshold_view: View) {
         assert!(threshold_view < self.latest_committed_block().view);
-        self.safe_blocks.retain(|_, b| b.view < threshold_view);
+        // do not remove genesis
+        let view_zero = View::new(0);
+        self.safe_blocks
+            .retain(|_, b| b.view > threshold_view && view_zero == b.view);
     }
 }