code: func (msg *MsgGetCFilters) BtcDecode(r io.Reader, pver uint32, _ MessageEncoding) error {
  	err := readElement(r, &msg.FilterType)
  	if err != nil {
  		return err
  	}
  
  	err = readElement(r, &msg.StartHeight)
  	if err != nil {
  		return err
  	}
  
  	return readElement(r, &msg.StopHash)
  }
docs: // BtcDecode decodes r using the bitcoin protocol encoding into the receiver.
  // This is part of the Message interface implementation.