chore: fix all compiler warnings

.gas-snapshot

@@ -1,7 +1,7 @@
-AxelarHelperTest:testCustomOrderingAxelar() (gas: 341805)
-AxelarHelperTest:testFancyAxelar() (gas: 236169)
-AxelarHelperTest:testMultiDstAxelar() (gas: 391397)
-AxelarHelperTest:testSimpleAxelar() (gas: 189999)
+AxelarHelperTest:testCustomOrderingAxelar() (gas: 340185)
+AxelarHelperTest:testFancyAxelar() (gas: 236007)
+AxelarHelperTest:testMultiDstAxelar() (gas: 391073)
+AxelarHelperTest:testSimpleAxelar() (gas: 189189)
 CelerHelperTest:testCustomOrderingCeler() (gas: 108685)
 CelerHelperTest:testFancyCeler() (gas: 118987)
 CelerHelperTest:testMultiDstCeler() (gas: 151884)
@@ -17,10 +17,10 @@ LayerZeroHelperTest:testFancyLZ() (gas: 296242)
 LayerZeroHelperTest:testMultiDstLZ() (gas: 476527)
 LayerZeroHelperTest:testSimpleLZ() (gas: 245817)
 LayerZeroHelperTest:testSimpleLZWithEstimates() (gas: 246414)
-LayerZeroV2HelperTest:testCustomEventSelector() (gas: 341769)
-LayerZeroV2HelperTest:testMultipleDestinations() (gas: 649473)
-LayerZeroV2HelperTest:testMultipleDestinationsCustomEventSelector() (gas: 649584)
-LayerZeroV2HelperTest:testSingleDestination() (gas: 344507)
+LayerZeroV2HelperTest:testCustomEventSelector() (gas: 341707)
+LayerZeroV2HelperTest:testMultipleDestinations() (gas: 649225)
+LayerZeroV2HelperTest:testMultipleDestinationsCustomEventSelector() (gas: 649336)
+LayerZeroV2HelperTest:testSingleDestination() (gas: 344445)
 StargateHelperTest:testCustomOrderingSG() (gas: 798922)
 StargateHelperTest:testFancySG() (gas: 591061)
 StargateHelperTest:testSimpleSG() (gas: 538333)
@@ -31,7 +31,7 @@ WormholeAutomaticRelayerHelperTest:testFancyWormhole() (gas: 224754)
 WormholeAutomaticRelayerHelperTest:testMultiDstWormhole() (gas: 345999)
 WormholeAutomaticRelayerHelperTest:testMultiDstWormholeWithAdditionalVAA() (gas: 374447)
 WormholeAutomaticRelayerHelperTest:testSimpleWormhole() (gas: 177619)
-WormholeSpecializedRelayerHelperTest:testCustomOrderingWormhole() (gas: 599240)
-WormholeSpecializedRelayerHelperTest:testFancyWormhole() (gas: 332394)
-WormholeSpecializedRelayerHelperTest:testMultiDstWormhole() (gas: 635874)
-WormholeSpecializedRelayerHelperTest:testSimpleWormhole() (gas: 335186)
+WormholeSpecializedRelayerHelperTest:testCustomOrderingWormhole() (gas: 599230)
+WormholeSpecializedRelayerHelperTest:testFancyWormhole() (gas: 332389)
+WormholeSpecializedRelayerHelperTest:testMultiDstWormhole() (gas: 635864)
+WormholeSpecializedRelayerHelperTest:testSimpleWormhole() (gas: 335181)

src/celer/CelerHelper.sol

@@ -283,7 +283,7 @@ contract CelerHelper is Test {
     /// @param fromMessageBus represents the source message bus address
     /// @param message represents the message data
     /// @return gasEstimate the estimated gas
-    function _estimateGas(address fromMessageBus, bytes memory message) internal returns (uint256 gasEstimate) {
+    function _estimateGas(address fromMessageBus, bytes memory message) internal view returns (uint256 gasEstimate) {
         /// NOTE: In celer two fees are involved, but only the 1st one is
         /// estimated here
         /// 1: Sync, Sign and Store Cost [Source Fees]

src/layerzero-v2/LayerZeroV2Helper.sol

@@ -132,7 +132,6 @@ contract LayerZeroV2Helper is Test {
     /// @return the decoded packet
     function decodePacket(bytes calldata encodedPacket) public pure returns (Packet memory) {
         /// @dev decode the packet header
-        uint8 version = uint8(encodedPacket[0]);
         uint64 nonce = toUint64(encodedPacket, 1);
         uint32 srcEid = toUint32(encodedPacket, 9);
         address sender = toAddress(encodedPacket, 13);

test/Axelar.t.sol

@@ -33,9 +33,9 @@ contract AnotherTarget {
     }
 
     function execute(
-        bytes32 commandId,
+        bytes32, /*commandId*/
         string calldata sourceChain,
-        string calldata sourceAddress,
+        string calldata, /*sourceAddress*/
         bytes calldata payload
     ) external {
         require(

test/Celer.t.sol

@@ -11,13 +11,15 @@ contract Target {
         Fail, // execution failed, finalized
         Success, // execution succeeded, finalized
         Retry // execution rejected, can retry later
+
     }
 
-    function executeMessage(address _sender, uint64 _srcChainId, bytes calldata _message, address _executor)
-        external
-        payable
-        returns (ExecutionStatus)
-    {
+    function executeMessage(
+        address, /*_sender*/
+        uint64, /*_srcChainId*/
+        bytes calldata _message,
+        address /*_executor*/
+    ) external payable returns (ExecutionStatus) {
         value = abi.decode(_message, (uint256));
 
         return ExecutionStatus.Success;
@@ -35,13 +37,14 @@ contract AnotherTarget {
         Fail, // execution failed, finalized
         Success, // execution succeeded, finalized
         Retry // execution rejected, can retry later
+
     }
 
     constructor(uint64 _expectedChainId) {
         expectedChainId = _expectedChainId;
     }
 
-    function executeMessage(address _sender, uint64 _srcChainId, bytes calldata _message, address _executor)
+    function executeMessage(address, /*_sender*/ uint64 _srcChainId, bytes calldata _message, address /*_executor*/ )
         external
         payable
         returns (ExecutionStatus)

test/Hyperlane.t.sol

@@ -22,7 +22,7 @@ interface IInterchainGasPaymaster {
 contract Target {
     uint256 public value;
 
-    function handle(uint32 _origin, bytes32 _sender, bytes calldata _message) external {
+    function handle(uint32, /*_origin*/ bytes32, /*_sender*/ bytes calldata _message) external {
         value = abi.decode(_message, (uint256));
     }
 }
@@ -38,7 +38,7 @@ contract AnotherTarget {
         expectedOrigin = _expectedOrigin;
     }
 
-    function handle(uint32 _origin, bytes32 _sender, bytes calldata _message) external {
+    function handle(uint32 _origin, bytes32, /*_sender*/ bytes calldata _message) external {
         require(_origin == expectedOrigin, "Unexpected origin");
         (value, kevin, bob) = abi.decode(_message, (uint256, address, bytes32));
     }

test/LayerZero.t.sol

@@ -19,9 +19,12 @@ interface ILayerZeroEndpoint {
 contract Target {
     uint256 public value;
 
-    function lzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload)
-        external
-    {
+    function lzReceive(
+        uint16, /*_srcChainId*/
+        bytes calldata, /*_srcAddress*/
+        uint64, /*_nonce*/
+        bytes calldata _payload
+    ) external {
         value = abi.decode(_payload, (uint256));
     }
 }
@@ -37,7 +40,7 @@ contract AnotherTarget {
         expectedId = _expectedId;
     }
 
-    function lzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload)
+    function lzReceive(uint16 _srcChainId, bytes calldata, /*_srcAddress*/ uint64, /*_nonce*/ bytes calldata _payload)
         external
     {
         require(_srcChainId == expectedId, "Unexpected id");

test/LayerZeroV2.t.sol

@@ -43,11 +43,11 @@ contract Target {
     uint256 public value;
 
     function lzReceive(
-        Origin calldata _origin,
-        bytes32 _guid,
+        Origin calldata, /*_origin*/
+        bytes32, /*_guid*/
         bytes calldata _message,
-        address _executor,
-        bytes calldata _extraData
+        address, /*_executor*/
+        bytes calldata /*_extraData*/
     ) external payable {
         value = abi.decode(_message, (uint256));
     }

test/Wormhole.AutomaticRelayer.t.sol

@@ -81,10 +81,10 @@ contract Target is IWormholeReceiver {
 
     function receiveWormholeMessages(
         bytes memory payload,
-        bytes[] memory additionalVaas,
-        bytes32 sourceAddress,
-        uint16 sourceChain,
-        bytes32 deliveryHash
+        bytes[] memory, /*additionalVaas*/
+        bytes32, /*sourceAddress*/
+        uint16, /*sourceChain*/
+        bytes32 /*deliveryHash*/
     ) external payable {
         value = abi.decode(payload, (uint256));
     }
@@ -97,9 +97,9 @@ contract AdditionalVAATarget is IWormholeReceiver {
     function receiveWormholeMessages(
         bytes memory payload,
         bytes[] memory additionalVaas,
-        bytes32 sourceAddress,
-        uint16 sourceChain,
-        bytes32 deliveryHash
+        bytes32, /*sourceAddress*/
+        uint16, /*sourceChain*/
+        bytes32 /*deliveryHash*/
     ) external payable {
         value = abi.decode(payload, (uint256));
         vaalen = additionalVaas.length;
@@ -119,10 +119,10 @@ contract AnotherTarget {
 
     function receiveWormholeMessages(
         bytes memory payload,
-        bytes[] memory additionalVaas,
-        bytes32 sourceAddress,
+        bytes[] memory, /*additionalVaas*/
+        bytes32, /*sourceAddress*/
         uint16 sourceChain,
-        bytes32 deliveryHash
+        bytes32 /*deliveryHash*/
     ) external payable {
         require(sourceChain == expectedChainId, "Unexpected origin");
         (value, kevin, bob) = abi.decode(payload, (uint256, address, bytes32));
@@ -137,11 +137,11 @@ contract CCTPTarget {
     }
 
     function receiveWormholeMessages(
-        bytes memory payload,
+        bytes memory, /*payload*/
         bytes[] memory additionalVaas,
-        bytes32 sourceAddress,
-        uint16 sourceChain,
-        bytes32 deliveryHash
+        bytes32, /*sourceAddress*/
+        uint16, /*sourceChain*/
+        bytes32 /*deliveryHash*/
     ) external payable {
         (bytes memory message, bytes memory attestation) = abi.decode(additionalVaas[0], (bytes, bytes));
         transmitter.receiveMessage(message, attestation);

test/Wormhole.SpecializedRelayer.t.sol

@@ -20,8 +20,7 @@ contract Target {
 
     function receiveMessage(bytes memory encodedMessage) public {
         // call the Wormhole core contract to parse and verify the encodedMessage
-        (IWormhole.VM memory wormholeMessage, bool valid, string memory reason) =
-            wormhole.parseAndVerifyVM(encodedMessage);
+        (IWormhole.VM memory wormholeMessage, bool valid,) = wormhole.parseAndVerifyVM(encodedMessage);
         // do security checks and set value
         require(valid);
         value = abi.decode(wormholeMessage.payload, (uint256));
@@ -42,8 +41,7 @@ contract AnotherTarget {
 
     function receiveMessage(bytes memory encodedMessage) public {
         // call the Wormhole core contract to parse and verify the encodedMessage
-        (IWormhole.VM memory wormholeMessage, bool valid, string memory reason) =
-            wormhole.parseAndVerifyVM(encodedMessage);
+        (IWormhole.VM memory wormholeMessage, bool valid,) = wormhole.parseAndVerifyVM(encodedMessage);
         // do security checks and set value
         require(valid);
         require(wormholeMessage.emitterChainId == 2);
@@ -93,7 +91,7 @@ contract WormholeSpecializedRelayerHelperTest is Test {
 
         POLYGON_FORK_ID = vm.createSelectFork(RPC_POLYGON_MAINNET);
         target = new Target(IWormhole(L2_1_CORE));
-        anotherTarget = new AnotherTarget(IWormhole(L2_1_CORE),address(this));
+        anotherTarget = new AnotherTarget(IWormhole(L2_1_CORE), address(this));
 
         ARBITRUM_FORK_ID = vm.createSelectFork(RPC_ARBITRUM_MAINNET);
         altTarget = new Target(IWormhole(L2_2_CORE));