From de0b8ae82ce35f77c2883c8d74445b354643b019 Mon Sep 17 00:00:00 2001
From: maskpp <maskpp266@gmail.com>
Date: Mon, 10 Feb 2025 22:49:54 +0800
Subject: [PATCH] avoid building repeat payload

---
 eth/catalyst/api.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/eth/catalyst/api.go b/eth/catalyst/api.go
index ad66671b6dcc..79b0f2a42854 100644
--- a/eth/catalyst/api.go
+++ b/eth/catalyst/api.go
@@ -474,6 +474,11 @@ func (api *ConsensusAPI) forkchoiceUpdated(update engine.ForkchoiceStateV1, payl
 				TxListHash:   &txListHash,
 			}
 			id := args.Id()
+			// If we already are busy generating this work, then we do not need
+			// to start a second process.
+			if api.localBlocks.has(id) {
+				return valid(&id), nil
+			}
 			payload, err := api.eth.Miner().BuildPayload(args, false)
 			if err != nil {
 				log.Error("Failed to build payload", "err", err)