code: func parseRelevantTxAcceptedParams(params []json.RawMessage) (transaction []byte, err error) {
  	if len(params) < 1 {
  		return nil, wrongNumParams(len(params))
  	}
  
  	return parseHexParam(params[0])
  }
docs: // parseRelevantTxAcceptedParams parses out the parameter included in a
  // relevanttxaccepted notification.