feat(02-client/cli): add query for client counterparty. (#7235)

* feat(02-client/cli): add query for client counterparty.

* chore: mirror grpc name.

* Apply suggestions from code review

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

---------

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

Author: DimitrisJim

modules/core/02-client/client/cli/cli.go

@@ -26,6 +26,7 @@ func GetQueryCmd() *cobra.Command {
 		GetCmdQueryConsensusStateHeights(),
 		GetCmdQueryConsensusState(),
 		GetCmdQueryHeader(),
+		GetCmdQueryClient(),
 		GetCmdSelfConsensusState(),
 		GetCmdClientParams(),
 	)

modules/core/02-client/client/cli/query.go

@@ -210,6 +210,38 @@ func GetCmdQueryConsensusStateHeights() *cobra.Command {
 	return cmd
 }
 
+// GetCmdQueryClient defines the command to query the client information (creator and counterparty) for the given client ID.
+func GetCmdQueryClient() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:     "client [client-id]",
+		Short:   "Query the information of a client.",
+		Long:    "Query the client information (creator and counterparty) for the provided client ID.",
+		Example: fmt.Sprintf("%s query %s %s client [client-id]", version.AppName, ibcexported.ModuleName, types.SubModuleName),
+		Args:    cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			clientCtx, err := client.GetClientQueryContext(cmd)
+			if err != nil {
+				return err
+			}
+			clientID := args[0]
+
+			queryClient := types.NewQueryClient(clientCtx)
+
+			req := &types.QueryClientRequest{ClientId: clientID}
+
+			res, err := queryClient.Client(cmd.Context(), req)
+			if err != nil {
+				return err
+			}
+
+			return clientCtx.PrintProto(res)
+		},
+	}
+	flags.AddQueryFlagsToCmd(cmd)
+
+	return cmd
+}
+
 // GetCmdQueryConsensusState defines the command to query the consensus state of
 // the chain as defined in https://github.com/cosmos/ibc/tree/master/spec/core/ics-002-client-semantics#query
 func GetCmdQueryConsensusState() *cobra.Command {