IWETH addition

Author: derpy-duck

src/interfaces/ITokenBridge.sol

@@ -3,7 +3,7 @@
 
 pragma solidity ^0.8.0;
 
-// import "./IWETH.sol";
+import "./IWETH.sol";
 import "./IWormhole.sol";
 
 interface ITokenBridge {
@@ -149,7 +149,7 @@ interface ITokenBridge {
 
     function tokenImplementation() external view returns (address);
 
-    // function WETH() external view returns (IWETH);
+    function WETH() external view returns (IWETH);
 
     function outstandingBridged(address token) external view returns (uint256);
 

src/interfaces/IWETH.sol

@@ -0,0 +1,11 @@
+// contracts/Bridge.sol
+// SPDX-License-Identifier: Apache 2
+
+pragma solidity ^0.8.0;
+
+import "./IERC20.sol";
+
+interface IWETH is IERC20 {
+    function deposit() external payable;
+    function withdraw(uint amount) external;
+}