def single_trigger_earn_out(contributorScoresWithEnrollment: pd.DataFrame) -> pd.DataFrame:
  """
  A function that earns out users with a negative writing impact upon any CRNH note
  Args:
      contributorScoresWithEnrollment (pd.DataFrame): contributor scores with state and current enrollment
  Returns:
    pd.DataFrame: updated contributor scores reflecting single trigger earned out users
  """
  earnedOutUsers = (
    (
      contributorScoresWithEnrollment[c.notesCurrentlyRatedNotHelpful].fillna(0, inplace=False)
      > contributorScoresWithEnrollment[c.notesCurrentlyRatedHelpful].fillna(0, inplace=False)
    )
    & (contributorScoresWithEnrollment[c.hasCrnhSinceEarnOut] == True)
    & (
      contributorScoresWithEnrollment[c.enrollmentState]
      != c.enrollmentStateToThrift[c.earnedOutNoAcknowledge]
    )
    & (
      contributorScoresWithEnrollment[c.enrollmentState]
      != c.enrollmentStateToThrift[c.earnedOutAcknowledged]
    )
    & (contributorScoresWithEnrollment[c.enrollmentState] != c.enrollmentStateToThrift[c.newUser])
    & (contributorScoresWithEnrollment[c.enrollmentState] != c.enrollmentStateToThrift[c.removed])
  )

  contributorScoresWithEnrollment.loc[earnedOutUsers, c.numberOfTimesEarnedOutKey] = (
    contributorScoresWithEnrollment.loc[earnedOutUsers, c.numberOfTimesEarnedOutKey] + 1
  )

  # use earned out no ack internally to identify newly earned out users
  contributorScoresWithEnrollment.loc[
    earnedOutUsers, c.enrollmentState
  ] = c.enrollmentStateToThrift[c.earnedOutNoAcknowledge]
  contributorScoresWithEnrollment.loc[earnedOutUsers, c.timestampOfLastStateChange] = c.epochMillis

  return contributorScoresWithEnrollment.drop(columns=[c.hasCrnhSinceEarnOut])

  A function that earns out users with a negative writing impact upon any CRNH note
  Args:
      contributorScoresWithEnrollment (pd.DataFrame): contributor scores with state and current enrollment
  Returns:
    pd.DataFrame: updated contributor scores reflecting single trigger earned out users
  
sourcecode/scoring/contributor_state.py