perf: smart Contract Performance Improvement ⚡

contracts/lib/utils/ReentrancyGuard.sol

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: MIT
+pragma solidity  >=0.8.4;
+
+/// @notice Reentrancy protection for smart contracts.
+/// @author z0r0z.eth
+/// @author Modified from Seaport
+///         (https://github.com/ProjectOpenSea/seaport/blob/main/contracts/lib/ReentrancyGuard.sol)
+/// @author Modified from Solmate
+///         (https://github.com/Rari-Capital/solmate/blob/main/src/utils/ReentrancyGuard.sol)
+abstract contract ReentrancyGuard {
+    error Reentrancy();
+
+    uint256 private guard = 1;
+
+    modifier nonReentrant() virtual {
+        setReentrancyGuard();
+
+        _;
+
+        clearReentrancyGuard();
+    }
+
+    /// @dev Check guard sentinel value and set it.
+    function setReentrancyGuard() internal virtual {
+        if (guard == 2) revert Reentrancy();
+
+        guard = 2;
+    }
+
+    /// @dev Unset sentinel value.
+    function clearReentrancyGuard() internal virtual {
+        guard = 1;
+    }
+}