From ce76139fed4cad5186ff185fcbeca2d79f1a6cbd Mon Sep 17 00:00:00 2001
From: Your Name <maeng779@gmail.com>
Date: Tue, 23 Apr 2024 14:01:49 +0900
Subject: [PATCH] eth/catalyst: fix block times and difficulty growth
 estimation

---
 eth/catalyst/api.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/eth/catalyst/api.go b/eth/catalyst/api.go
index 28b28218e3..f733721977 100644
--- a/eth/catalyst/api.go
+++ b/eth/catalyst/api.go
@@ -657,7 +657,7 @@ func (api *ConsensusAPI) heartbeat() {
 				if deltaTime > 0 {
 					growth := deltaDiff / deltaTime
 					left := new(big.Int).Sub(ttd, htd)
-					eta = time.Duration(new(big.Int).Div(left, new(big.Int).SetUint64(growth)).Uint64()) * time.Second
+					eta = time.Duration(new(big.Int).Div(left, new(big.Int).SetUint64(growth+1)).Uint64()) * time.Second
 				}
 			}
 			message := "Merge is configured, but previously seen beacon client is offline. Please ensure it is operational before the transition arrives!"