diff --git a/contracts/core/Dispatcher.sol b/contracts/core/Dispatcher.sol
index 3b06706e..b7b26064 100644
--- a/contracts/core/Dispatcher.sol
+++ b/contracts/core/Dispatcher.sol
@@ -296,26 +296,27 @@ contract Dispatcher is IbcDispatcher, IbcEventsEmitter, Ownable, Ibc {
      * The dApp's onCloseIbcChannel callback is invoked.
      * dApp should throw an error if the channel should not be closed.
      */
-    function onCloseIbcChannel(address portAddress, bytes32 channelId, Ics23Proof calldata proof) external {
-        // verify VIBC/IBC hub chain has processed ChanCloseConfirm event
-        consensusStateManager.verifyMembership(
-            proof,
-            bytes('channel/path/to/be/added/here'),
-            bytes('expected channel bytes constructed from params. Channel.State = {Closed(_Pending?)}')
-        );
-
-        // ensure port owns channel
-        Channel memory channel = portChannelMap[portAddress][channelId];
-        if (channel.counterpartyChannelId == bytes32(0)) {
-            revert channelNotOwnedByPortAddress();
-        }
-
-        // confirm with dApp by calling its callback
-        IbcChannelReceiver reciever = IbcChannelReceiver(portAddress);
-        reciever.onCloseIbcChannel(channelId, channel.counterpartyPortId, channel.counterpartyChannelId);
-        delete portChannelMap[portAddress][channelId];
-        emit CloseIbcChannel(portAddress, channelId);
-    }
+    // FIXME this is commented out to make the contract size smaller. We need to optimise for size
+    // function onCloseIbcChannel(address portAddress, bytes32 channelId, Ics23Proof calldata proof) external {
+    //     // verify VIBC/IBC hub chain has processed ChanCloseConfirm event
+    //     consensusStateManager.verifyMembership(
+    //         proof,
+    //         bytes('channel/path/to/be/added/here'),
+    //         bytes('expected channel bytes constructed from params. Channel.State = {Closed(_Pending?)}')
+    //     );
+    //
+    //     // ensure port owns channel
+    //     Channel memory channel = portChannelMap[portAddress][channelId];
+    //     if (channel.counterpartyChannelId == bytes32(0)) {
+    //         revert channelNotOwnedByPortAddress();
+    //     }
+    //
+    //     // confirm with dApp by calling its callback
+    //     IbcChannelReceiver reciever = IbcChannelReceiver(portAddress);
+    //     reciever.onCloseIbcChannel(channelId, channel.counterpartyPortId, channel.counterpartyChannelId);
+    //     delete portChannelMap[portAddress][channelId];
+    //     emit CloseIbcChannel(portAddress, channelId);
+    // }
 
     //
     // IBC Packet methods
diff --git a/test/Dispatcher.t.sol b/test/Dispatcher.t.sol
index 370a83d2..a8f4b6eb 100644
--- a/test/Dispatcher.t.sol
+++ b/test/Dispatcher.t.sol
@@ -219,35 +219,36 @@ contract ChannelOpenTestBase is Base {
     }
 }
 
-contract DispatcherCloseChannelTest is ChannelOpenTestBase {
-    function test_closeChannelInit_success() public {
-        vm.expectEmit(true, true, true, true);
-        emit CloseIbcChannel(address(mars), channelId);
-        mars.triggerChannelClose(channelId);
-    }
-
-    function test_closeChannelInit_mustOwner() public {
-        Mars earth = new Mars(dispatcher);
-        vm.expectRevert(abi.encodeWithSignature('channelNotOwnedBySender()'));
-        earth.triggerChannelClose(channelId);
-    }
-
-    function test_closeChannelConfirm_success() public {
-        vm.expectEmit(true, true, true, true);
-        emit CloseIbcChannel(address(mars), channelId);
-        dispatcher.onCloseIbcChannel(address(mars), channelId, validProof);
-    }
-
-    function test_closeChannelConfirm_mustOwner() public {
-        vm.expectRevert(abi.encodeWithSignature('channelNotOwnedByPortAddress()'));
-        dispatcher.onCloseIbcChannel(address(mars), 'channel-999', validProof);
-    }
-
-    function test_closeChannelConfirm_invalidProof() public {
-        vm.expectRevert('Invalid dummy membership proof');
-        dispatcher.onCloseIbcChannel(address(mars), channelId, invalidProof);
-    }
-}
+// FIXME this is commented out to make the contract size smaller. We need to optimise for size
+// contract DispatcherCloseChannelTest is ChannelOpenTestBase {
+//     function test_closeChannelInit_success() public {
+//         vm.expectEmit(true, true, true, true);
+//         emit CloseIbcChannel(address(mars), channelId);
+//         mars.triggerChannelClose(channelId);
+//     }
+//
+//     function test_closeChannelInit_mustOwner() public {
+//         Mars earth = new Mars(dispatcher);
+//         vm.expectRevert(abi.encodeWithSignature('channelNotOwnedBySender()'));
+//         earth.triggerChannelClose(channelId);
+//     }
+//
+//     function test_closeChannelConfirm_success() public {
+//         vm.expectEmit(true, true, true, true);
+//         emit CloseIbcChannel(address(mars), channelId);
+//         dispatcher.onCloseIbcChannel(address(mars), channelId, validProof);
+//     }
+//
+//     function test_closeChannelConfirm_mustOwner() public {
+//         vm.expectRevert(abi.encodeWithSignature('channelNotOwnedByPortAddress()'));
+//         dispatcher.onCloseIbcChannel(address(mars), 'channel-999', validProof);
+//     }
+//
+//     function test_closeChannelConfirm_invalidProof() public {
+//         vm.expectRevert('Invalid dummy membership proof');
+//         dispatcher.onCloseIbcChannel(address(mars), channelId, invalidProof);
+//     }
+// }
 
 contract DispatcherSendPacketTest is ChannelOpenTestBase {
     // default params