From 3b989f1e2501ceaddf4747781c549a7604ae5894 Mon Sep 17 00:00:00 2001
From: Marius van der Wijden <m.vanderwijden@live.de>
Date: Wed, 8 Apr 2026 15:27:59 +0200
Subject: [PATCH] core: undo unnecessary change

---
 core/vm/instructions.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index 84855bf845..10ea09ed8b 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -516,6 +516,9 @@ func opSload(pc *uint64, evm *EVM, scope *ScopeContext) ([]byte, error) {
 }
 
 func opSstore(pc *uint64, evm *EVM, scope *ScopeContext) ([]byte, error) {
+	if evm.readOnly {
+		return nil, ErrWriteProtection
+	}
 	loc := scope.Stack.pop()
 	val := scope.Stack.pop()
 	evm.StateDB.SetState(scope.Contract.Address(), loc.Bytes32(), val.Bytes32())