From 3a69d1e48120c3909254b8da3bf2fdd605fc8b8d Mon Sep 17 00:00:00 2001
From: xiaoch05 <xiaoch2010@gmail.com>
Date: Fri, 26 Apr 2024 14:17:41 +0800
Subject: [PATCH] add transfer ownership event

---
 helix-contract/contracts/utils/AccessController.sol | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/helix-contract/contracts/utils/AccessController.sol b/helix-contract/contracts/utils/AccessController.sol
index c74d5fe0..c080c2ab 100644
--- a/helix-contract/contracts/utils/AccessController.sol
+++ b/helix-contract/contracts/utils/AccessController.sol
@@ -9,6 +9,8 @@ contract AccessController {
     address public operator;
     address public pendingDao;
 
+    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
+
     modifier onlyDao() {
         require(msg.sender == dao, "!dao");
         _;
@@ -33,10 +35,12 @@ contract AccessController {
     }
 
     function acceptOwnership() external {
+        address oldDao = dao;
         address newDao = msg.sender;
         require(pendingDao == newDao, "!pendingDao");
         delete pendingDao;
         dao = newDao;
+        emit OwnershipTransferred(oldDao, newDao);
     }
 }