diff --git a/contracts/base/GeneralMiddleware.sol b/contracts/base/GeneralMiddleware.sol
index 3d00a7c4..1259411e 100644
--- a/contracts/base/GeneralMiddleware.sol
+++ b/contracts/base/GeneralMiddleware.sol
@@ -71,8 +71,8 @@ contract GeneralMiddleware is IbcMwUser, IbcMiddleware, IbcMwEventsEmitter, IbcM
         bytes32 destPortAddr,
         bytes calldata appData,
         uint64 timeoutTimestamp,
-        uint256[2] calldata gasLimits,
-        uint256[2] calldata gasPrices
+        uint256[2] memory gasLimits,
+        uint256[2] memory gasPrices
     ) external payable override returns (uint64 sequence) {}
 
     function sendMWPacket(
diff --git a/contracts/examples/Mars.sol b/contracts/examples/Mars.sol
index 9b3928ef..f4a7a532 100644
--- a/contracts/examples/Mars.sol
+++ b/contracts/examples/Mars.sol
@@ -92,15 +92,9 @@ contract Mars is IbcReceiverBase, IbcReceiver, FeeSender {
 
     /**
      * @notice Callback for acknowledging a packet; triggered on reciept of an IBC packet by the counterparty
-     * @param packet The IBC packet for which acknowledgement is received
-     * @param ack The acknowledgement packet received
      * @dev Make sure to validate packet's source and destiation channels and ports.
      */
-    function onAcknowledgementPacket(IbcPacket calldata packet, AckPacket calldata ack)
-        external
-        virtual
-        onlyIbcDispatcher
-    {
+    function onAcknowledgementPacket(IbcPacket calldata, AckPacket calldata ack) external virtual onlyIbcDispatcher {
         ackPackets.push(ack);
     }
 
@@ -119,14 +113,8 @@ contract Mars is IbcReceiverBase, IbcReceiver, FeeSender {
      * @notice Handles channel close callback on the dest chain
      * @param channelId The unique identifier of the channel
      * @dev Make sure to validate channelId and counterpartyVersion
-     * @param counterpartyPortId The unique identifier of the counterparty's port
-     * @param counterpartyChannelId The unique identifier of the counterparty's channel
      */
-    function onChanCloseConfirm(bytes32 channelId, string calldata counterpartyPortId, bytes32 counterpartyChannelId)
-        external
-        virtual
-        onlyIbcDispatcher
-    {
+    function onChanCloseConfirm(bytes32 channelId, string calldata, bytes32) external virtual onlyIbcDispatcher {
         // logic to determine if the channel should be closed
         bool channelFound = false;
         for (uint256 i = 0; i < connectedChannels.length; i++) {
@@ -182,8 +170,8 @@ contract Mars is IbcReceiverBase, IbcReceiver, FeeSender {
         string calldata message,
         bytes32 channelId,
         uint64 timeoutTimestamp,
-        uint256[2] calldata gasLimits,
-        uint256[2] calldata gasPrices
+        uint256[2] memory gasLimits,
+        uint256[2] memory gasPrices
     ) external payable returns (uint64 sequence) {
         sequence = dispatcher.sendPacket(channelId, bytes(message), timeoutTimestamp);
         _depositSendPacketFee(dispatcher, channelId, sequence, gasLimits, gasPrices);
@@ -192,15 +180,15 @@ contract Mars is IbcReceiverBase, IbcReceiver, FeeSender {
     /**
      * @notice Handles the channel close init event
      * @dev Make sure to validate channelId and counterpartyVersion
-     * @param counterpartyPortIdentifier The unique identifier of the counterparty's channel
      * @param version The channel version
      */
-    function onChanOpenInit(
-        ChannelOrder,
-        string[] calldata,
-        string calldata counterpartyPortIdentifier,
-        string calldata version
-    ) external view virtual onlyIbcDispatcher returns (string memory selectedVersion) {
+    function onChanOpenInit(ChannelOrder, string[] calldata, string calldata, string calldata version)
+        external
+        view
+        virtual
+        onlyIbcDispatcher
+        returns (string memory selectedVersion)
+    {
         return _openChannel(version);
     }
 
diff --git a/contracts/implementation_templates/FeeSender.sol b/contracts/implementation_templates/FeeSender.sol
index 1e204416..8da2550d 100644
--- a/contracts/implementation_templates/FeeSender.sol
+++ b/contracts/implementation_templates/FeeSender.sol
@@ -45,14 +45,16 @@ abstract contract FeeSender {
      *                  - gasPrices[1] for `ackPacket` fees, for the src chain
      * @notice The total fees sent in the msg.value should be equal to the total gasLimits[0] * gasPrices[0] +
      * @notice Use the Polymer fee estimation api to get the required fees to ensure that enough fees are sent.
+     * @dev Note: We have to have gasLimits and gasPrices as memory arrays. We cannot have them as calldata arrays
+     * because solidity has weird behavior with using too much calldata in stacked calls
      * gasLimits[1] * gasPrices[1]. The transaction will revert if a higher or lower value is sent
      */
     function _depositSendPacketFee(
         IbcDispatcher dispatcher,
         bytes32 channelId,
         uint64 sequence,
-        uint256[2] calldata gasLimits,
-        uint256[2] calldata gasPrices
+        uint256[2] memory gasLimits,
+        uint256[2] memory gasPrices
     ) internal {
         dispatcher.feeVault().depositSendPacketFee{value: msg.value}(channelId, sequence, gasLimits, gasPrices);
     }