[#1301] adm/morph: Add flag -v to 'Tokens'

Signed-off-by: Alexander Chuprov <a.chuprov@yadro.com>

cmd/frostfs-adm/internal/modules/morph/nns/tokens.go

@@ -1,15 +1,25 @@
 package nns
 
 import (
+	"math/big"
+	"strings"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-contract/nns"
+	client "git.frostfs.info/TrueCloudLab/frostfs-contract/rpcclient/nns"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-adm/internal/commonflags"
 	commonCmd "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/internal/common"
 	"github.com/spf13/cobra"
 )
 
+const (
+	verboseDesc = "Include additional information about CNAME record."
+)
+
 func initTokensCmd() {
 	Cmd.AddCommand(tokensCmd)
 	tokensCmd.Flags().StringP(commonflags.EndpointFlag, commonflags.EndpointFlagShort, "", commonflags.EndpointFlagDesc)
 	tokensCmd.Flags().String(commonflags.AlphabetWalletsFlag, "", commonflags.AlphabetWalletsFlagDesc)
+	tokensCmd.Flags().BoolP(commonflags.Verbose, commonflags.VerboseShorthand, false, verboseDesc)
 }
 
 func listTokens(cmd *cobra.Command, _ []string) {
@@ -18,7 +28,39 @@ func listTokens(cmd *cobra.Command, _ []string) {
 	commonCmd.ExitOnErr(cmd, "unable to get tokens: %w", err)
 	for toks, err := it.Next(10); err == nil && len(toks) > 0; toks, err = it.Next(10) {
 		for _, token := range toks {
-			cmd.Println(string(token))
+			output := string(token)
+			if verbose, _ := cmd.Flags().GetBool(commonflags.Verbose); verbose {
+				cname, err := getCnameRecord(c, token)
+				commonCmd.ExitOnErr(cmd, "", err)
+				if cname != "" {
+					output += " (CNAME: " + cname + ")"
+				}
+			}
+			cmd.Println(output)
 		}
 	}
 }
+
+func getCnameRecord(c *client.Contract, token []byte) (string, error) {
+	items, err := c.GetRecords(string(token), big.NewInt(int64(nns.CNAME)))
+
+	// GetRecords returns the error "not an array" if the domain does not contain records.
+	if err != nil && strings.Contains(err.Error(), "not an array") {
+		return "", nil
+	}
+
+	if err != nil {
+		return "", err
+	}
+
+	if len(items) == 0 {
+		return "", nil
+	}
+
+	record, err := items[0].TryBytes()
+	if err != nil {
+		return "", err
+	}
+
+	return string(record), nil
+}