From b8e2cbd08a091756a5364743fe825012551f8787 Mon Sep 17 00:00:00 2001
From: Joaquin Gonzalez <jpgonzalezra@gmail.com>
Date: Mon, 20 May 2024 17:15:17 -0300
Subject: [PATCH] fix: Add check for already initialized guardian

---
 src/SimpleGuardianModule.sol | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/SimpleGuardianModule.sol b/src/SimpleGuardianModule.sol
index 5b7a9f2..a9aef0b 100644
--- a/src/SimpleGuardianModule.sol
+++ b/src/SimpleGuardianModule.sol
@@ -18,6 +18,7 @@ abstract contract SimpleGuardianModule {
     error InvalidGuardianSignature();
     error NotGuardian();
     error InvalidNonce();
+    error GuardianAlreadyInitialized();
 
     address public guardian;
     mapping(address => uint256) private _nonces;
@@ -37,7 +38,9 @@ abstract contract SimpleGuardianModule {
     }
 
     function initGuardian(address newGuardian) external {
-        require(guardian == address(0));
+        if (guardian != address(0)) {
+            revert GuardianAlreadyInitialized();
+        }
         _updateGuardian(newGuardian);
     }