perf: smart Contract Performance Improvement ⚡

contracts/lib/auth/Owned.sol

@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.8.4;
+
+/// @notice Simple single owner authorization mixin.
+/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/auth/Owned.sol)
+abstract contract Owned {
+    /*//////////////////////////////////////////////////////////////
+                                 EVENTS
+    //////////////////////////////////////////////////////////////*/
+
+    event OwnerUpdated(
+        address indexed user,
+        address indexed newOwner
+    );
+
+    /*//////////////////////////////////////////////////////////////
+                            OWNERSHIP STORAGE
+    //////////////////////////////////////////////////////////////*/
+
+    address public owner;
+
+    modifier onlyOwner() virtual {
+        require(msg.sender == owner, "UNAUTHORIZED");
+
+        _;
+    }
+
+    /*//////////////////////////////////////////////////////////////
+                               CONSTRUCTOR
+    //////////////////////////////////////////////////////////////*/
+
+    constructor(address _owner) {
+        owner = _owner;
+
+        emit OwnerUpdated(address(0), _owner);
+    }
+
+    /*//////////////////////////////////////////////////////////////
+                             OWNERSHIP LOGIC
+    //////////////////////////////////////////////////////////////*/
+
+    function setOwner(
+        address newOwner
+    ) public virtual onlyOwner {
+        owner = newOwner;
+
+        emit OwnerUpdated(msg.sender, newOwner);
+    }
+}