code: def tx_is_data_script(out_script, blockchain='bitcoin', **blockchain_opts):
      
      if blockchain == 'bitcoin':
          return btc_tx_output_script_has_data(out_script, **blockchain_opts)
      else:
          raise ValueError('Unknown blockchain "{}"'.format(blockchain))
docs: Given a blockchain name and an output script (tx['outs'][x]['script']),
      determine whether or not it is a data-bearing script---i.e. one with data for the state engine.
  
      Return True if so
      Reurn False if not