code: def namedb_get_names_owned_by_address( cur, address, current_block ):
      
  
      unexpired_fragment, unexpired_args = namedb_select_where_unexpired_names( current_block )
  
      select_query = "SELECT name FROM name_records JOIN namespaces ON name_records.namespace_id = namespaces.namespace_id " + \
                     "WHERE name_records.address = ? AND name_records.revoked = 0 AND " + unexpired_fragment + ";"
      args = (address,) + unexpired_args
  
      name_rows = namedb_query_execute( cur, select_query, args )
  
      names = []
      for name_row in name_rows:
          names.append( name_row['name'] )
  
      if len(names) == 0:
          return None 
      else:
          return names
docs: Get the list of non-expired, non-revoked names owned by an address.
      Only works if there is a *singular* address for the name.