evm: Add transceiver type getter to Transceiver base contract (wormhole-foundation#456)

Author: nik-suri

evm/src/Transceiver/Transceiver.sol

@@ -90,6 +90,8 @@ abstract contract Transceiver is
         return nttManagerToken;
     }
 
+    function getTransceiverType() external view virtual returns (string memory);
+
     /// =============== TRANSCEIVING LOGIC ===============================================
 
     /// @inheritdoc ITransceiver

evm/src/Transceiver/WormholeTransceiver/WormholeTransceiver.sol

@@ -33,7 +33,7 @@ contract WormholeTransceiver is
 {
     using BytesParsing for bytes;
 
-    string public constant WORMHOLE_TRANSCEIVER_VERSION = "1.0.0";
+    string public constant WORMHOLE_TRANSCEIVER_VERSION = "1.1.0";
 
     constructor(
         address nttManager,
@@ -55,6 +55,10 @@ contract WormholeTransceiver is
 
     // ==================== External Interface ===============================================
 
+    function getTransceiverType() external pure override returns (string memory) {
+        return "wormhole";
+    }
+
     /// @inheritdoc IWormholeTransceiver
     function receiveMessage(bytes memory encodedMessage) external {
         uint16 sourceChainId;

evm/src/interfaces/ITransceiver.sol

@@ -37,6 +37,9 @@ interface ITransceiver {
         bytes32 recipientNttManagerAddress, bytes32 expectedRecipientNttManagerAddress
     );
 
+    /// @notice Returns the string type of the transceiver. E.g. "wormhole", "axelar", etc.
+    function getTransceiverType() external view returns (string memory);
+
     /// @notice Fetch the delivery price for a given recipient chain transfer.
     /// @param recipientChain The Wormhole chain ID of the target chain.
     /// @param instruction An additional Instruction provided by the Transceiver to be

evm/test/mocks/DummyTransceiver.sol

@@ -12,6 +12,10 @@ contract DummyTransceiver is Transceiver, ITransceiverReceiver {
 
     constructor(address nttManager) Transceiver(nttManager) {}
 
+    function getTransceiverType() external pure override returns (string memory) {
+        return "dummy";
+    }
+
     function _quoteDeliveryPrice(
         uint16, /* recipientChain */
         TransceiverStructs.TransceiverInstruction memory /* transceiverInstruction */