[#169] Add --ttl argument in CLI

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

cmd/neofs-cli/modules/root.go

@@ -21,6 +21,8 @@ const (
 	envPrefix = "NEOFS_CLI"
 
 	generateKeyConst = "new"
+
+	ttlDefaultValue = 2
 )
 
 // Global scope flags.
@@ -73,6 +75,9 @@ func init() {
 	rootCmd.PersistentFlags().StringP("rpc-endpoint", "r", "", "remote node address (as 'multiaddr' or '<host>:<port>')")
 	_ = viper.BindPFlag("rpc", rootCmd.PersistentFlags().Lookup("rpc-endpoint"))
 
+	rootCmd.PersistentFlags().Uint32("ttl", ttlDefaultValue, "TTL value in request meta header")
+	_ = viper.BindPFlag("ttl", rootCmd.PersistentFlags().Lookup("ttl"))
+
 	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose output")
 
 	// Cobra also supports local flags, which will only run
@@ -165,6 +170,13 @@ func getSDKClient() (*client.Client, error) {
 	return client.New(key, client.WithAddress(ipAddr))
 }
 
+func getTTL() uint32 {
+	ttl := viper.GetUint32("ttl")
+	printVerbose("TTL: %d", ttl)
+
+	return ttl
+}
+
 // ownerFromString converts string with NEO3 wallet address to neofs owner ID.
 func ownerFromString(s string) (*owner.ID, error) {
 	result := owner.NewID()