From 284cd8a85be7cb756cdad99888299f928c415a90 Mon Sep 17 00:00:00 2001
From: qinglin89 <316032931@qq.com>
Date: Fri, 10 Mar 2023 15:23:42 +0800
Subject: [PATCH 1/2] consensus: fix delete the 1st validator from
 snapshot.recents list

---
 consensus/parlia/parlia.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/consensus/parlia/parlia.go b/consensus/parlia/parlia.go
index f3e051691b..22054cfa0d 100644
--- a/consensus/parlia/parlia.go
+++ b/consensus/parlia/parlia.go
@@ -1326,7 +1326,11 @@ func (p *Parlia) backOffTime(snap *Snapshot, header *types.Header, val common.Ad
 		if p.chainConfig.IsPlanck(header.Number) {
 			// reverse the key/value of snap.Recents to get recentsMap
 			recentsMap := make(map[common.Address]uint64, len(snap.Recents))
+			bound := header.Number.Uint64() - uint64(len(validators)/2+1)
 			for seen, recent := range snap.Recents {
+				if seen <= bound {
+					continue
+				}
 				recentsMap[recent] = seen
 			}
 

From 94afd8106c81650a358b225bd29b2ab4ce53ef6c Mon Sep 17 00:00:00 2001
From: qinglin89 <316032931@qq.com>
Date: Sun, 12 Mar 2023 12:06:40 +0800
Subject: [PATCH 2/2] consensus:fix uint sub error with negative

---
 consensus/parlia/parlia.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/consensus/parlia/parlia.go b/consensus/parlia/parlia.go
index 22054cfa0d..693a9e28b3 100644
--- a/consensus/parlia/parlia.go
+++ b/consensus/parlia/parlia.go
@@ -1326,7 +1326,10 @@ func (p *Parlia) backOffTime(snap *Snapshot, header *types.Header, val common.Ad
 		if p.chainConfig.IsPlanck(header.Number) {
 			// reverse the key/value of snap.Recents to get recentsMap
 			recentsMap := make(map[common.Address]uint64, len(snap.Recents))
-			bound := header.Number.Uint64() - uint64(len(validators)/2+1)
+			bound := uint64(0)
+			if n, limit := header.Number.Uint64(), uint64(len(validators)/2+1); n > limit {
+				bound = n - limit
+			}
 			for seen, recent := range snap.Recents {
 				if seen <= bound {
 					continue