From 47ee58bc9fde394b8bc8ac0e2c82131276181187 Mon Sep 17 00:00:00 2001
From: Tsahi Zidenberg <tsahi@offchainlabs.com>
Date: Tue, 30 Aug 2022 12:01:04 -0600
Subject: [PATCH] fast-exist FindRetentionBound

---
 core/blockchain_arbitrum.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/core/blockchain_arbitrum.go b/core/blockchain_arbitrum.go
index d46a2eff9b..2709b8ae39 100644
--- a/core/blockchain_arbitrum.go
+++ b/core/blockchain_arbitrum.go
@@ -73,6 +73,10 @@ func (bc *BlockChain) FindRetentionBound() uint64 {
 	minimumSpan := bc.cacheConfig.TriesInMemory
 	minimumAge := uint64(bc.cacheConfig.TrieRetention.Seconds())
 
+	if minimumAge == 0 {
+		return minimumSpan
+	}
+
 	saturatingCast := func(value int64) uint64 {
 		if value < 0 {
 			return 0