adding client status cli query (#372)

* adding client status cli query

* adding query client status cli to changelog

* updating long CLI help usage

CHANGELOG.md

@@ -102,6 +102,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 ### Features
 
 * [\#198](https://github.com/cosmos/ibc-go/pull/198) New CLI command `query ibc-transfer escrow-address <port> <channel id>` to get the escrow address for a channel; can be used to then query balance of escrowed tokens
+* [\#372](https://github.com/cosmos/ibc-go/pull/372) New CLI command `query ibc client status <client id>` to get the current activity status of a client
 
 ### Client Breaking Changes
 

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

@@ -20,6 +20,7 @@ func GetQueryCmd() *cobra.Command {
 	queryCmd.AddCommand(
 		GetCmdQueryClientStates(),
 		GetCmdQueryClientState(),
+		GetCmdQueryClientStatus(),
 		GetCmdQueryConsensusStates(),
 		GetCmdQueryConsensusState(),
 		GetCmdQueryHeader(),

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

@@ -89,6 +89,39 @@ func GetCmdQueryClientState() *cobra.Command {
 	return cmd
 }
 
+// GetCmdQueryClientStatus defines the command to query the status of a client with a given id
+func GetCmdQueryClientStatus() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:     "status [client-id]",
+		Short:   "Query client status",
+		Long:    "Query client activity status. Any client without an 'Active' status is considered inactive",
+		Example: fmt.Sprintf("%s query %s %s status [client-id]", version.AppName, host.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.QueryClientStatusRequest{
+				ClientId: clientID,
+			}
+
+			clientStatusRes, err := queryClient.ClientStatus(cmd.Context(), req)
+			if err != nil {
+				return err
+			}
+
+			return clientCtx.PrintProto(clientStatusRes)
+		},
+	}
+
+	return cmd
+}
+
 // GetCmdQueryConsensusStates defines the command to query all the consensus states from a given
 // client state.
 func GetCmdQueryConsensusStates() *cobra.Command {