claimReward.sol

function claimReward(Data storage _self, address _voter, uint _salt) public returns (uint) {
  // Ensures the voter has not already claimed tokens and challenge results have been processed
  require(_self.tokenClaims[_voter] == false);
  require(isResolved(_self));

  uint voterTokens = _self.voting.getNumPassingTokens(_voter, _self.challengeID, _salt);
  uint reward = voterReward(_self, _voter, _salt);

  // Subtracts the voter's information to preserve the participation ratios
  // of other voters compared to the remaining pool of rewards
  _self.winningTokens -= voterTokens;
  _self.rewardPool -= reward;

  require(_self.token.transfer(_voter, reward));

  // Ensures a voter cannot claim tokens again
  _self.tokenClaims[_voter] = true;
    
  return reward;
}