From f59872222a6b32a59504ebe79637332f5e9d8d1c Mon Sep 17 00:00:00 2001
From: snowrugar-beep <snowrugar-beep@users.noreply.github.com>
Date: Wed, 29 Jul 2026 17:14:05 +0100
Subject: [PATCH] perf(access): inline access control checks into unchecked
 helpers

Refactor modifier logic into an internal _checkOwner() view function
so that each guarded function reuses a single check routine instead
of duplicating the same bytecode at every entry point.

Closes #739
---
 contracts/access/GasGuardAccess.sol | 39 +++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 contracts/access/GasGuardAccess.sol

diff --git a/contracts/access/GasGuardAccess.sol b/contracts/access/GasGuardAccess.sol
new file mode 100644
index 0000000..d8c3e42
--- /dev/null
+++ b/contracts/access/GasGuardAccess.sol
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+abstract contract GasGuardAccess {
+    address public owner;
+    address public pendingOwner;
+
+    error Unauthorized();
+    error ZeroAddress();
+    error AlreadySet();
+
+    event OwnershipTransferStarted(address indexed from, address indexed to);
+
+    constructor(address owner_) {
+        if (owner_ == address(0)) revert ZeroAddress();
+        owner = owner_;
+    }
+
+    function _checkOwner() internal view {
+        if (msg.sender != owner) revert Unauthorized();
+    }
+
+    modifier onlyOwner() {
+        _checkOwner();
+        _;
+    }
+
+    function transferOwnership(address newOwner) external onlyOwner {
+        if (newOwner == address(0)) revert ZeroAddress();
+        pendingOwner = newOwner;
+        emit OwnershipTransferStarted(owner, newOwner);
+    }
+
+    function acceptOwnership() external {
+        if (msg.sender != pendingOwner) revert Unauthorized();
+        owner = pendingOwner;
+        pendingOwner = address(0);
+    }
+}