params: 
data must not be empty
/home/storagev2/xstorage.rb:18:in `update'
/home/storagev2/xstorage.rb:18:in `decrypt'
/home/storagev2/xstorage.rb:220:in `decode'
/home/storagev2/xstorage.rb:227:in `dispatch'
/home/storagev2/xstorage.rb:251:in `main'
/home/storagev2/xsettings.rb:13:in `<main>'