code: def namedb_get_namespace_reveal( cur, namespace_id, current_block, include_history=True ):
      
  
      select_query = "SELECT * FROM namespaces WHERE namespace_id = ? AND op = ? AND reveal_block <= ? AND ? < reveal_block + ?;"
      args = (namespace_id, NAMESPACE_REVEAL, current_block, current_block, NAMESPACE_REVEAL_EXPIRE)
  
      namespace_reveal_rows = namedb_query_execute( cur, select_query, args )
  
      namespace_reveal_row = namespace_reveal_rows.fetchone()
      if namespace_reveal_row is None:
          # no such reveal 
          return None 
  
      reveal_rec = {}
      reveal_rec.update( namespace_reveal_row )
  
      if include_history:
          hist = namedb_get_history( cur, namespace_id )
          reveal_rec['history'] = hist
      
      reveal_rec = op_decanonicalize('NAMESPACE_REVEAL', reveal_rec)
      return reveal_rec
docs: Get a namespace reveal, and optionally its history, given its namespace ID.
      Only return a namespace record if:
      * it is not ready
      * it is not expired