Add EIP7702Utils (#5587)

contracts/account/utils/EIP7702Utils.sol

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.20;
+
+/**
+ * @dev Library with common EIP-7702 utility functions.
+ *
+ * See https://eips.ethereum.org/EIPS/eip-7702[ERC-7702].
+ */
+library EIP7702Utils {
+    bytes3 internal constant EIP7702_PREFIX = 0xef0100;
+
+    /**
+     * @dev Returns the address of the delegate if `account` as an EIP-7702 delegation setup, or address(0) otherwise.
+     */
+    function fetchDelegate(address account) internal view returns (address) {
+        bytes23 delegation = bytes23(account.code);
+        return bytes3(delegation) == EIP7702_PREFIX ? address(bytes20(delegation << 24)) : address(0);
+    }
+}