Timelock, erc20Wrapper and erc20FlashMint verification

certora/harnesses/ERC20FlashMintHarness.sol

@@ -0,0 +1,5 @@
+import "../munged/token/ERC20/extensions/ERC20FlashMint.sol";
+
+contract ERC20FlashMintHarness is ERC20FlashMint {
+    constructor(string memory name, string memory symbol) ERC20(name, symbol) {}
+}

certora/harnesses/ERC20WrapperHarness.sol

@@ -6,5 +6,12 @@ contract ERC20WrapperHarness is ERC20Wrapper {
         ERC20Wrapper(underlyingToken)
         ERC20(_name, _symbol)
     {}
-}
 
+    function underlyingTotalSupply() public view returns (uint256) {
+        return underlying.totalSupply();
+    }
+
+    function underlyingBalanceOf(address account) public view returns (uint256) {
+        return underlying.balanceOf(account);
+    }
+}

certora/harnesses/IERC3156FlashBorrowerHarness.sol

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: MIT
+// OpenZeppelin Contracts v4.4.1 (interfaces/IERC3156FlashBorrower.sol)
+
+import "../munged/interfaces/IERC3156FlashBorrower.sol";
+
+pragma solidity ^0.8.0;
+
+contract IERC3156FlashBorrowerHarness is IERC3156FlashBorrower {
+    bytes32 somethingToReturn;
+
+    function onFlashLoan(
+        address initiator,
+        address token,
+        uint256 amount,
+        uint256 fee,
+        bytes calldata data
+    ) external override returns (bytes32){
+        return somethingToReturn;
+    }
+}