Fix ibc client (#8341)

* fix-ibc-client

* add changelog

CHANGELOG.md

@@ -43,6 +43,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 ### Bug Fixes
 
   * (x/auth) [\#8287](https://github.com/cosmos/cosmos-sdk/pull/8287) Fix `tx sign --signature-only` to return correct sequence value in signature.
+  * (x/ibc) [\#8341](https://github.com/cosmos/cosmos-sdk/pull/8341) Fix query latest consensus state.
 
 ## [v0.40.0](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.40.0) - 2021-01-08
 

x/ibc/core/04-channel/client/utils/utils.go

@@ -133,8 +133,9 @@ func QueryLatestConsensusState(
 	if err != nil {
 		return nil, clienttypes.Height{}, clienttypes.Height{}, err
 	}
-	clientState, err := clienttypes.UnpackClientState(clientRes.IdentifiedClientState.ClientState)
-	if err != nil {
+
+	var clientState exported.ClientState
+	if err := clientCtx.InterfaceRegistry.UnpackAny(clientRes.IdentifiedClientState.ClientState, &clientState); err != nil {
 		return nil, clienttypes.Height{}, clienttypes.Height{}, err
 	}
 
@@ -148,8 +149,8 @@ func QueryLatestConsensusState(
 		return nil, clienttypes.Height{}, clienttypes.Height{}, err
 	}
 
-	consensusState, err := clienttypes.UnpackConsensusState(res.ConsensusState)
-	if err != nil {
+	var consensusState exported.ConsensusState
+	if err := clientCtx.InterfaceRegistry.UnpackAny(res.ConsensusState, &consensusState); err != nil {
 		return nil, clienttypes.Height{}, clienttypes.Height{}, err
 	}