sanity for TimelockController and Votes

certora/munged/mocks/EIP712External.sol

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+import "../utils/cryptography/draft-EIP712.sol";
+import "../utils/cryptography/ECDSA.sol";
+
+contract EIP712External is EIP712 {
+    constructor(string memory name, string memory version) EIP712(name, version) {}
+
+    function domainSeparator() external view returns (bytes32) {
+        return _domainSeparatorV4();
+    }
+
+    function verify(
+        bytes memory signature,
+        address signer,
+        address mailTo,
+        string memory mailContents
+    ) external view {
+        bytes32 digest = _hashTypedDataV4(
+            keccak256(abi.encode(keccak256("Mail(address to,string contents)"), mailTo, keccak256(bytes(mailContents))))
+        );
+        address recoveredSigner = ECDSA.recover(digest, signature);
+        require(recoveredSigner == signer);
+    }
+
+    function getChainId() external view returns (uint256) {
+        return block.chainid;
+    }
+}