From 3c87a31db83abbbbd1242df05a2d7d3d53e3a4c0 Mon Sep 17 00:00:00 2001
From: aryansonid <aryan.s400029@gmail.com>
Date: Thu, 5 Mar 2026 19:29:27 +0530
Subject: [PATCH] feat: add new precompile contract interface

---
 core/vm/contracts.go            |  1 -
 core/vm/whitelist_precompile.go | 48 +++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 core/vm/whitelist_precompile.go

diff --git a/core/vm/contracts.go b/core/vm/contracts.go
index a438a7ec83..816a65c7d8 100644
--- a/core/vm/contracts.go
+++ b/core/vm/contracts.go
@@ -62,7 +62,6 @@ var PrecompiledContractsHomestead = PrecompiledContracts{
 	common.BytesToAddress([]byte{0x2}): &sha256hash{},
 	common.BytesToAddress([]byte{0x3}): &ripemd160hash{},
 	common.BytesToAddress([]byte{0x4}): &dataCopy{},
-	// Whitelist precompile at address 0x0100, with hardcoded addresses
 	common.BytesToAddress([]byte{0x01, 0x00}): NewWhitelistPrecompile([]common.Address{
 		common.HexToAddress("0x1111111111111111111111111111111111111111"),
 		common.HexToAddress("0x2222222222222222222222222222222222222222"),
diff --git a/core/vm/whitelist_precompile.go b/core/vm/whitelist_precompile.go
new file mode 100644
index 0000000000..22b0b0c82c
--- /dev/null
+++ b/core/vm/whitelist_precompile.go
@@ -0,0 +1,48 @@
+// Copyright 2014 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package vm
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// WhitelistPrecompile is a precompiled contract for address whitelisting.
+type WhitelistPrecompile struct {
+	whitelist map[common.Address]struct{}
+}
+
+func NewWhitelistPrecompile(addresses []common.Address) *WhitelistPrecompile {
+	wl := make(map[common.Address]struct{})
+	for _, addr := range addresses {
+		wl[addr] = struct{}{}
+	}
+	return &WhitelistPrecompile{whitelist: wl}
+}
+
+func (w *WhitelistPrecompile) RequiredGas(input []byte) uint64 {
+	return 1000
+}
+
+func (w *WhitelistPrecompile) Run(input []byte) ([]byte, error) {
+	// Expect input: first 20 bytes = caller address
+	return []byte{}, nil
+
+}
+
+func (w *WhitelistPrecompile) Name() string {
+	return "WhitelistPrecompile"
+}