update wormhole interface

Change-Id: I821234d1d010d9efd15cefb412a35b8717c36fa7

ethereum/contracts/interfaces/IWormhole.sol

@@ -0,0 +1,42 @@
+// contracts/Messages.sol
+// SPDX-License-Identifier: Apache 2
+
+pragma solidity ^0.8.0;
+
+import "../Structs.sol";
+
+interface IWormhole is Structs {
+    event LogMessagePublished(address indexed sender, uint64 sequence, uint32 nonce, bytes payload, uint8 consistencyLevel);
+
+    function publishMessage(
+        uint32 nonce,
+        bytes memory payload,
+        uint8 consistencyLevel
+    ) external payable returns (uint64 sequence);
+
+    function parseAndVerifyVM(bytes calldata encodedVM) external view returns (Structs.VM memory vm, bool valid, string memory reason);
+
+    function verifyVM(Structs.VM memory vm) external view returns (bool valid, string memory reason);
+
+    function verifySignatures(bytes32 hash, Structs.Signature[] memory signatures, Structs.GuardianSet memory guardianSet) external pure returns (bool valid, string memory reason) ;
+
+    function parseVM(bytes memory encodedVM) external pure returns (Structs.VM memory vm);
+
+    function getGuardianSet(uint32 index) external view returns (Structs.GuardianSet memory) ;
+
+    function getCurrentGuardianSetIndex() external view returns (uint32) ;
+
+    function getGuardianSetExpiry() external view returns (uint32) ;
+
+    function governanceActionIsConsumed(bytes32 hash) external view returns (bool) ;
+
+    function isInitialized(address impl) external view returns (bool) ;
+
+    function chainId() external view returns (uint16) ;
+
+    function governanceChainId() external view returns (uint16);
+
+    function governanceContract() external view returns (bytes32);
+
+    function messageFee() external view returns (uint256) ;
+}