From a34dbd8435792223b04cd839518be9218263c450 Mon Sep 17 00:00:00 2001
From: Weixie Cui <cuiweixie@gmail.com>
Date: Tue, 14 Jul 2026 20:00:00 +0800
Subject: [PATCH] internal/ethapi: cap default tx sync timeout at RPC max

SendRawTransactionSync capped an explicitly requested timeout but not
the configured default. Clamp defaultTimeout to the max so a misconfigured
default cannot wait longer than RPCTxSyncMaxTimeout.
---
 internal/ethapi/api.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 2eb4dee3c0..d5cabaea49 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1790,6 +1790,9 @@ func (api *TransactionAPI) SendRawTransactionSync(ctx context.Context, input hex
 		defaultTimeout = api.b.RPCTxSyncDefaultTimeout()
 		timeout        = defaultTimeout
 	)
+	if timeout > maxTimeout {
+		timeout = maxTimeout
+	}
 	if timeoutMs != nil && *timeoutMs > 0 {
 		req := time.Duration(*timeoutMs) * time.Millisecond
 		if req > maxTimeout {