code: def get_renew_burn_info( outputs ):
      
      if len(outputs) < 4:
          raise Exception("Malformed renew outputs: don't have 4")
  
      burn_addr = virtualchain.script_hex_to_address(outputs[3]['script'])
      if burn_addr is None:
          raise Exception("Malformed renew inputs: burn output is a nonstandard script")
  
      op_fee = outputs[3]['value']
      return {'burn_address': burn_addr, 'op_fee': op_fee}
docs: There are four poutputs: the OP_RETURN, the registration (owner)
      address, the change address (i.e. from the preorderer), and the
      burn address with the renewal fee.
  
      Get the burn address and value