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/**
 *Submitted for verification at Etherscan.io on 2018-04-02
*/

pragma solidity ^0.4.19;

// File: zeppelin/contracts/ownership/Ownable.sol

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
  address public owner;


  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() {
    owner = msg.sender;
  }


  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }


  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) onlyOwner public {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

// File: zeppelin/contracts/lifecycle/Pausable.sol

/**
 * @title Pausable
 * @dev Base contract which allows children to implement an emergency stop mechanism.
 */
contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  /**
   * @dev Modifier to make a function callable only when the contract is not paused.
   */
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  /**
   * @dev Modifier to make a function callable only when the contract is paused.
   */
  modifier whenPaused() {
    require(paused);
    _;
  }

  /**
   * @dev called by the owner to pause, triggers stopped state
   */
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    Pause();
  }

  /**
   * @dev called by the owner to unpause, returns to normal state
   */
  function unpause() onlyOwner whenPaused public {
    paused = false;
    Unpause();
  }
}

// File: zeppelin/contracts/math/SafeMath.sol

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {
  function mul(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal constant returns (uint256) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    return c;
  }

  function sub(uint256 a, uint256 b) internal constant returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

// File: zeppelin/contracts/ownership/HasNoEther.sol

/**
 * @title Contracts that should not own Ether
 * @author Remco Bloemen <remco@2π.com>
 * @dev This tries to block incoming ether to prevent accidental loss of Ether. Should Ether end up
 * in the contract, it will allow the owner to reclaim this ether.
 * @notice Ether can still be send to this contract by:
 * calling functions labeled `payable`
 * `selfdestruct(contract_address)`
 * mining directly to the contract address
*/
contract HasNoEther is Ownable {

  /**
  * @dev Constructor that rejects incoming Ether
  * @dev The `payable` flag is added so we can access `msg.value` without compiler warning. If we
  * leave out payable, then Solidity will allow inheriting contracts to implement a payable
  * constructor. By doing it this way we prevent a payable constructor from working. Alternatively
  * we could use assembly to access msg.value.
  */
  function HasNoEther() payable {
    require(msg.value == 0);
  }

  /**
   * @dev Disallows direct send by settings a default function without the `payable` flag.
   */
  function() external {
  }

  /**
   * @dev Transfer all Ether held by the contract to the owner.
   */
  function reclaimEther() external onlyOwner {
    assert(owner.send(this.balance));
  }
}

// File: contracts/presale/AxiePresale.sol

contract AxiePresale is HasNoEther, Pausable {
  using SafeMath for uint256;

  // No Axies can be adopted after this end date: Friday, March 16, 2018 11:59:59 PM GMT.
  uint256 constant public PRESALE_END_TIMESTAMP = 1521244799;

  uint8 constant public CLASS_BEAST = 0;
  uint8 constant public CLASS_AQUATIC = 2;
  uint8 constant public CLASS_PLANT = 4;

  uint256 constant public INITIAL_PRICE_INCREMENT = 1600 szabo; // 0.0016 Ether
  uint256 constant public INITIAL_PRICE = INITIAL_PRICE_INCREMENT;
  uint256 constant public REF_CREDITS_PER_AXIE = 5;

  mapping (uint8 => uint256) public currentPrices;
  mapping (uint8 => uint256) public priceIncrements;

  mapping (uint8 => uint256) public totalAxiesAdopted;
  mapping (address => mapping (uint8 => uint256)) public axiesAdopted;

  mapping (address => uint256) public referralCredits;
  mapping (address => uint256) public axiesRewarded;
  uint256 public totalAxiesRewarded;

  event AxiesAdopted(
    address indexed adopter,
    uint8 indexed clazz,
    uint256 quantity,
    address indexed referrer
  );

  event AxiesRewarded(address indexed receiver, uint256 quantity);

  event AdoptedAxiesRedeemed(address indexed receiver, uint8 indexed clazz, uint256 quantity);
  event RewardedAxiesRedeemed(address indexed receiver, uint256 quantity);

  function AxiePresale() public {
    priceIncrements[CLASS_BEAST] = priceIncrements[CLASS_AQUATIC] = //
      priceIncrements[CLASS_PLANT] = INITIAL_PRICE_INCREMENT;

    currentPrices[CLASS_BEAST] = currentPrices[CLASS_AQUATIC] = //
      currentPrices[CLASS_PLANT] = INITIAL_PRICE;
  }

  function axiesPrice(
    uint256 beastQuantity,
    uint256 aquaticQuantity,
    uint256 plantQuantity
  )
    public
    view
    returns (uint256 totalPrice)
  {
    uint256 price;

    (price,,) = _axiesPrice(CLASS_BEAST, beastQuantity);
    totalPrice = totalPrice.add(price);

    (price,,) = _axiesPrice(CLASS_AQUATIC, aquaticQuantity);
    totalPrice = totalPrice.add(price);

    (price,,) = _axiesPrice(CLASS_PLANT, plantQuantity);
    totalPrice = totalPrice.add(price);
  }

  function adoptAxies(
    uint256 beastQuantity,
    uint256 aquaticQuantity,
    uint256 plantQuantity,
    address referrer
  )
    public
    payable
    whenNotPaused
  {
    require(now <= PRESALE_END_TIMESTAMP);

    require(beastQuantity <= 3);
    require(aquaticQuantity <= 3);
    require(plantQuantity <= 3);

    address adopter = msg.sender;
    address actualReferrer = 0x0;

    // An adopter cannot be his/her own referrer.
    if (referrer != adopter) {
      actualReferrer = referrer;
    }

    uint256 value = msg.value;
    uint256 price;

    if (beastQuantity > 0) {
      price = _adoptAxies(
        adopter,
        CLASS_BEAST,
        beastQuantity,
        actualReferrer
      );

      require(value >= price);
      value -= price;
    }

    if (aquaticQuantity > 0) {
      price = _adoptAxies(
        adopter,
        CLASS_AQUATIC,
        aquaticQuantity,
        actualReferrer
      );

      require(value >= price);
      value -= price;
    }

    if (plantQuantity > 0) {
      price = _adoptAxies(
        adopter,
        CLASS_PLANT,
        plantQuantity,
        actualReferrer
      );

      require(value >= price);
      value -= price;
    }

    msg.sender.transfer(value);

    // The current referral is ignored if the referrer's address is 0x0.
    if (actualReferrer != 0x0) {
      uint256 numCredit = referralCredits[actualReferrer]
        .add(beastQuantity)
        .add(aquaticQuantity)
        .add(plantQuantity);

      uint256 numReward = numCredit / REF_CREDITS_PER_AXIE;

      if (numReward > 0) {
        referralCredits[actualReferrer] = numCredit % REF_CREDITS_PER_AXIE;
        axiesRewarded[actualReferrer] = axiesRewarded[actualReferrer].add(numReward);
        totalAxiesRewarded = totalAxiesRewarded.add(numReward);
        AxiesRewarded(actualReferrer, numReward);
      } else {
        referralCredits[actualReferrer] = numCredit;
      }
    }
  }

  function redeemAdoptedAxies(
    address receiver,
    uint256 beastQuantity,
    uint256 aquaticQuantity,
    uint256 plantQuantity
  )
    public
    onlyOwner
    returns (
      uint256 /* remainingBeastQuantity */,
      uint256 /* remainingAquaticQuantity */,
      uint256 /* remainingPlantQuantity */
    )
  {
    return (
      _redeemAdoptedAxies(receiver, CLASS_BEAST, beastQuantity),
      _redeemAdoptedAxies(receiver, CLASS_AQUATIC, aquaticQuantity),
      _redeemAdoptedAxies(receiver, CLASS_PLANT, plantQuantity)
    );
  }

  function redeemRewardedAxies(
    address receiver,
    uint256 quantity
  )
    public
    onlyOwner
    returns (uint256 remainingQuantity)
  {
    remainingQuantity = axiesRewarded[receiver] = axiesRewarded[receiver].sub(quantity);

    if (quantity > 0) {
      // This requires that rewarded Axies are always included in the total
      // to make sure overflow won't happen.
      totalAxiesRewarded -= quantity;

      RewardedAxiesRedeemed(receiver, quantity);
    }
  }

  /**
   * @dev Calculate price of Axies from the same class.
   * @param clazz The class of Axies.
   * @param quantity Number of Axies to be calculated.
   */
  function _axiesPrice(
    uint8 clazz,
    uint256 quantity
  )
    private
    view
    returns (uint256 totalPrice, uint256 priceIncrement, uint256 currentPrice)
  {
    priceIncrement = priceIncrements[clazz];
    currentPrice = currentPrices[clazz];

    uint256 nextPrice;

    for (uint256 i = 0; i < quantity; i++) {
      totalPrice = totalPrice.add(currentPrice);
      nextPrice = currentPrice.add(priceIncrement);

      if (nextPrice / 100 finney != currentPrice / 100 finney) {
        priceIncrement >>= 1;
      }

      currentPrice = nextPrice;
    }
  }

  /**
   * @dev Adopt some Axies from the same class.
   * @param adopter Address of the adopter.
   * @param clazz The class of adopted Axies.
   * @param quantity Number of Axies to be adopted, this should be positive.
   * @param referrer Address of the referrer.
   */
  function _adoptAxies(
    address adopter,
    uint8 clazz,
    uint256 quantity,
    address referrer
  )
    private
    returns (uint256 totalPrice)
  {
    (totalPrice, priceIncrements[clazz], currentPrices[clazz]) = _axiesPrice(clazz, quantity);

    axiesAdopted[adopter][clazz] = axiesAdopted[adopter][clazz].add(quantity);
    totalAxiesAdopted[clazz] = totalAxiesAdopted[clazz].add(quantity);

    AxiesAdopted(
      adopter,
      clazz,
      quantity,
      referrer
    );
  }

  /**
   * @dev Redeem adopted Axies from the same class.
   * @param receiver Address of the receiver.
   * @param clazz The class of adopted Axies.
   * @param quantity Number of adopted Axies to be redeemed.
   */
  function _redeemAdoptedAxies(
    address receiver,
    uint8 clazz,
    uint256 quantity
  )
    private
    returns (uint256 remainingQuantity)
  {
    remainingQuantity = axiesAdopted[receiver][clazz] = axiesAdopted[receiver][clazz].sub(quantity);

    if (quantity > 0) {
      // This requires that adopted Axies are always included in the total
      // to make sure overflow won't happen.
      totalAxiesAdopted[clazz] -= quantity;

      AdoptedAxiesRedeemed(receiver, clazz, quantity);
    }
  }
}

// File: zeppelin/contracts/ownership/HasNoContracts.sol

/**
 * @title Contracts that should not own Contracts
 * @author Remco Bloemen <remco@2π.com>
 * @dev Should contracts (anything Ownable) end up being owned by this contract, it allows the owner
 * of this contract to reclaim ownership of the contracts.
 */
contract HasNoContracts is Ownable {

  /**
   * @dev Reclaim ownership of Ownable contracts
   * @param contractAddr The address of the Ownable to be reclaimed.
   */
  function reclaimContract(address contractAddr) external onlyOwner {
    Ownable contractInst = Ownable(contractAddr);
    contractInst.transferOwnership(owner);
  }
}

// File: contracts/presale/AxiePresaleExtended.sol

contract AxiePresaleExtended is HasNoContracts, Pausable {
  using SafeMath for uint256;

  // No Axies can be adopted after this end date: Monday, April 16, 2018 11:59:59 PM GMT.
  uint256 constant public PRESALE_END_TIMESTAMP = 1523923199;

  // The total number of adopted Axies will be capped at 5250,
  // so the number of Axies which have Mystic parts will be capped roughly at 2000.
  uint256 constant public MAX_TOTAL_ADOPTED_AXIES = 5250;

  uint8 constant public CLASS_BEAST = 0;
  uint8 constant public CLASS_AQUATIC = 2;
  uint8 constant public CLASS_PLANT = 4;

  // The initial price increment and the initial price are for reference only
  uint256 constant public INITIAL_PRICE_INCREMENT = 1600 szabo; // 0.0016 Ether
  uint256 constant public INITIAL_PRICE = INITIAL_PRICE_INCREMENT;

  uint256 constant public REF_CREDITS_PER_AXIE = 5;

  AxiePresale public presaleContract;
  address public redemptionAddress;

  mapping (uint8 => uint256) public currentPrice;
  mapping (uint8 => uint256) public priceIncrement;

  mapping (uint8 => uint256) private _totalAdoptedAxies;
  mapping (uint8 => uint256) private _totalDeductedAdoptedAxies;
  mapping (address => mapping (uint8 => uint256)) private _numAdoptedAxies;
  mapping (address => mapping (uint8 => uint256)) private _numDeductedAdoptedAxies;

  mapping (address => uint256) private _numRefCredits;
  mapping (address => uint256) private _numDeductedRefCredits;
  uint256 public numBountyCredits;

  uint256 private _totalRewardedAxies;
  uint256 private _totalDeductedRewardedAxies;
  mapping (address => uint256) private _numRewardedAxies;
  mapping (address => uint256) private _numDeductedRewardedAxies;

  event AxiesAdopted(
    address indexed _adopter,
    uint8 indexed _class,
    uint256 _quantity,
    address indexed _referrer
  );

  event AxiesRewarded(address indexed _receiver, uint256 _quantity);

  event AdoptedAxiesRedeemed(address indexed _receiver, uint8 indexed _class, uint256 _quantity);
  event RewardedAxiesRedeemed(address indexed _receiver, uint256 _quantity);

  event RefCreditsMinted(address indexed _receiver, uint256 _numMintedCredits);

  function AxiePresaleExtended() public payable {
    require(msg.value == 0);
    paused = true;
    numBountyCredits = 300;
  }

  function () external payable {
    require(msg.sender == address(presaleContract));
  }

  modifier whenNotInitialized {
    require(presaleContract == address(0));
    _;
  }

  modifier whenInitialized {
    require(presaleContract != address(0));
    _;
  }

  modifier onlyRedemptionAddress {
    require(msg.sender == redemptionAddress);
    _;
  }

  function reclaimEther() external onlyOwner whenInitialized {
    presaleContract.reclaimEther();
    owner.transfer(this.balance);
  }

  /**
   * @dev This must be called only once after the owner of the presale contract
   *  has been updated to this contract.
   */
  function initialize(address _presaleAddress) external onlyOwner whenNotInitialized {
    // Set the presale address.
    presaleContract = AxiePresale(_presaleAddress);

    presaleContract.pause();

    // Restore price increments from the old contract.
    priceIncrement[CLASS_BEAST] = presaleContract.priceIncrements(CLASS_BEAST);
    priceIncrement[CLASS_AQUATIC] = presaleContract.priceIncrements(CLASS_AQUATIC);
    priceIncrement[CLASS_PLANT] = presaleContract.priceIncrements(CLASS_PLANT);

    // Restore current prices from the old contract.
    currentPrice[CLASS_BEAST] = presaleContract.currentPrices(CLASS_BEAST);
    currentPrice[CLASS_AQUATIC] = presaleContract.currentPrices(CLASS_AQUATIC);
    currentPrice[CLASS_PLANT] = presaleContract.currentPrices(CLASS_PLANT);

    paused = false;
  }

  function setRedemptionAddress(address _redemptionAddress) external onlyOwner whenInitialized {
    redemptionAddress = _redemptionAddress;
  }

  function totalAdoptedAxies(
    uint8 _class,
    bool _deduction
  )
    external
    view
    whenInitialized
    returns (uint256 _number)
  {
    _number = _totalAdoptedAxies[_class]
      .add(presaleContract.totalAxiesAdopted(_class));

    if (_deduction) {
      _number = _number.sub(_totalDeductedAdoptedAxies[_class]);
    }
  }

  function numAdoptedAxies(
    address _owner,
    uint8 _class,
    bool _deduction
  )
    external
    view
    whenInitialized
    returns (uint256 _number)
  {
    _number = _numAdoptedAxies[_owner][_class]
      .add(presaleContract.axiesAdopted(_owner, _class));

    if (_deduction) {
      _number = _number.sub(_numDeductedAdoptedAxies[_owner][_class]);
    }
  }

  function numRefCredits(
    address _owner,
    bool _deduction
  )
    external
    view
    whenInitialized
    returns (uint256 _number)
  {
    _number = _numRefCredits[_owner]
      .add(presaleContract.referralCredits(_owner));

    if (_deduction) {
      _number = _number.sub(_numDeductedRefCredits[_owner]);
    }
  }

  function totalRewardedAxies(
    bool _deduction
  )
    external
    view
    whenInitialized
    returns (uint256 _number)
  {
    _number = _totalRewardedAxies
      .add(presaleContract.totalAxiesRewarded());

    if (_deduction) {
      _number = _number.sub(_totalDeductedRewardedAxies);
    }
  }

  function numRewardedAxies(
    address _owner,
    bool _deduction
  )
    external
    view
    whenInitialized
    returns (uint256 _number)
  {
    _number = _numRewardedAxies[_owner]
      .add(presaleContract.axiesRewarded(_owner));

    if (_deduction) {
      _number = _number.sub(_numDeductedRewardedAxies[_owner]);
    }
  }

  function axiesPrice(
    uint256 _beastQuantity,
    uint256 _aquaticQuantity,
    uint256 _plantQuantity
  )
    external
    view
    whenInitialized
    returns (uint256 _totalPrice)
  {
    uint256 price;

    (price,,) = _sameClassAxiesPrice(CLASS_BEAST, _beastQuantity);
    _totalPrice = _totalPrice.add(price);

    (price,,) = _sameClassAxiesPrice(CLASS_AQUATIC, _aquaticQuantity);
    _totalPrice = _totalPrice.add(price);

    (price,,) = _sameClassAxiesPrice(CLASS_PLANT, _plantQuantity);
    _totalPrice = _totalPrice.add(price);
  }

  function adoptAxies(
    uint256 _beastQuantity,
    uint256 _aquaticQuantity,
    uint256 _plantQuantity,
    address _referrer
  )
    external
    payable
    whenInitialized
    whenNotPaused
  {
    require(now <= PRESALE_END_TIMESTAMP);
    require(_beastQuantity <= 3 && _aquaticQuantity <= 3 && _plantQuantity <= 3);

    uint256 _totalAdopted = this.totalAdoptedAxies(CLASS_BEAST, false)
      .add(this.totalAdoptedAxies(CLASS_AQUATIC, false))
      .add(this.totalAdoptedAxies(CLASS_PLANT, false))
      .add(_beastQuantity)
      .add(_aquaticQuantity)
      .add(_plantQuantity);

    require(_totalAdopted <= MAX_TOTAL_ADOPTED_AXIES);

    address _adopter = msg.sender;
    address _actualReferrer = 0x0;

    // An adopter cannot be his/her own referrer.
    if (_referrer != _adopter) {
      _actualReferrer = _referrer;
    }

    uint256 _value = msg.value;
    uint256 _price;

    if (_beastQuantity > 0) {
      _price = _adoptSameClassAxies(
        _adopter,
        CLASS_BEAST,
        _beastQuantity,
        _actualReferrer
      );

      require(_value >= _price);
      _value -= _price;
    }

    if (_aquaticQuantity > 0) {
      _price = _adoptSameClassAxies(
        _adopter,
        CLASS_AQUATIC,
        _aquaticQuantity,
        _actualReferrer
      );

      require(_value >= _price);
      _value -= _price;
    }

    if (_plantQuantity > 0) {
      _price = _adoptSameClassAxies(
        _adopter,
        CLASS_PLANT,
        _plantQuantity,
        _actualReferrer
      );

      require(_value >= _price);
      _value -= _price;
    }

    msg.sender.transfer(_value);

    // The current referral is ignored if the referrer's address is 0x0.
    if (_actualReferrer != 0x0) {
      _applyRefCredits(
        _actualReferrer,
        _beastQuantity.add(_aquaticQuantity).add(_plantQuantity)
      );
    }
  }

  function mintRefCredits(
    address _receiver,
    uint256 _numMintedCredits
  )
    external
    onlyOwner
    whenInitialized
    returns (uint256)
  {
    require(_receiver != address(0));
    numBountyCredits = numBountyCredits.sub(_numMintedCredits);
    _applyRefCredits(_receiver, _numMintedCredits);
    RefCreditsMinted(_receiver, _numMintedCredits);
    return numBountyCredits;
  }

  function redeemAdoptedAxies(
    address _receiver,
    uint256 _beastQuantity,
    uint256 _aquaticQuantity,
    uint256 _plantQuantity
  )
    external
    onlyRedemptionAddress
    whenInitialized
    returns (
      uint256 /* remainingBeastQuantity */,
      uint256 /* remainingAquaticQuantity */,
      uint256 /* remainingPlantQuantity */
    )
  {
    return (
      _redeemSameClassAdoptedAxies(_receiver, CLASS_BEAST, _beastQuantity),
      _redeemSameClassAdoptedAxies(_receiver, CLASS_AQUATIC, _aquaticQuantity),
      _redeemSameClassAdoptedAxies(_receiver, CLASS_PLANT, _plantQuantity)
    );
  }

  function redeemRewardedAxies(
    address _receiver,
    uint256 _quantity
  )
    external
    onlyRedemptionAddress
    whenInitialized
    returns (uint256 _remainingQuantity)
  {
    _remainingQuantity = this.numRewardedAxies(_receiver, true).sub(_quantity);

    if (_quantity > 0) {
      _numDeductedRewardedAxies[_receiver] = _numDeductedRewardedAxies[_receiver].add(_quantity);
      _totalDeductedRewardedAxies = _totalDeductedRewardedAxies.add(_quantity);

      RewardedAxiesRedeemed(_receiver, _quantity);
    }
  }

  /**
   * @notice Calculate price of Axies from the same class.
   * @param _class The class of Axies.
   * @param _quantity Number of Axies to be calculated.
   */
  function _sameClassAxiesPrice(
    uint8 _class,
    uint256 _quantity
  )
    private
    view
    returns (
      uint256 _totalPrice,
      uint256 /* should be _subsequentIncrement */ _currentIncrement,
      uint256 /* should be _subsequentPrice */ _currentPrice
    )
  {
    _currentIncrement = priceIncrement[_class];
    _currentPrice = currentPrice[_class];

    uint256 _nextPrice;

    for (uint256 i = 0; i < _quantity; i++) {
      _totalPrice = _totalPrice.add(_currentPrice);
      _nextPrice = _currentPrice.add(_currentIncrement);

      if (_nextPrice / 100 finney != _currentPrice / 100 finney) {
        _currentIncrement >>= 1;
      }

      _currentPrice = _nextPrice;
    }
  }

  /**
   * @notice Adopt some Axies from the same class.
   * @dev The quantity MUST be positive.
   * @param _adopter Address of the adopter.
   * @param _class The class of adopted Axies.
   * @param _quantity Number of Axies to be adopted.
   * @param _referrer Address of the referrer.
   */
  function _adoptSameClassAxies(
    address _adopter,
    uint8 _class,
    uint256 _quantity,
    address _referrer
  )
    private
    returns (uint256 _totalPrice)
  {
    (_totalPrice, priceIncrement[_class], currentPrice[_class]) = _sameClassAxiesPrice(_class, _quantity);

    _numAdoptedAxies[_adopter][_class] = _numAdoptedAxies[_adopter][_class].add(_quantity);
    _totalAdoptedAxies[_class] = _totalAdoptedAxies[_class].add(_quantity);

    AxiesAdopted(
      _adopter,
      _class,
      _quantity,
      _referrer
    );
  }

  function _applyRefCredits(address _receiver, uint256 _numAppliedCredits) private {
    _numRefCredits[_receiver] = _numRefCredits[_receiver].add(_numAppliedCredits);

    uint256 _numCredits = this.numRefCredits(_receiver, true);
    uint256 _numRewards = _numCredits / REF_CREDITS_PER_AXIE;

    if (_numRewards > 0) {
      _numDeductedRefCredits[_receiver] = _numDeductedRefCredits[_receiver]
        .add(_numRewards.mul(REF_CREDITS_PER_AXIE));

      _numRewardedAxies[_receiver] = _numRewardedAxies[_receiver].add(_numRewards);
      _totalRewardedAxies = _totalRewardedAxies.add(_numRewards);

      AxiesRewarded(_receiver, _numRewards);
    }
  }

  /**
   * @notice Redeem adopted Axies from the same class.
   * @dev Emit the `AdoptedAxiesRedeemed` event if the quantity is positive.
   * @param _receiver The address of the receiver.
   * @param _class The class of adopted Axies.
   * @param _quantity The number of adopted Axies to be redeemed.
   */
  function _redeemSameClassAdoptedAxies(
    address _receiver,
    uint8 _class,
    uint256 _quantity
  )
    private
    returns (uint256 _remainingQuantity)
  {
    _remainingQuantity = this.numAdoptedAxies(_receiver, _class, true).sub(_quantity);

    if (_quantity > 0) {
      _numDeductedAdoptedAxies[_receiver][_class] = _numDeductedAdoptedAxies[_receiver][_class].add(_quantity);
      _totalDeductedAdoptedAxies[_class] = _totalDeductedAdoptedAxies[_class].add(_quantity);

      AdoptedAxiesRedeemed(_receiver, _class, _quantity);
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"constant":false,"inputs":[{"name":"_beastQuantity","type":"uint256"},{"name":"_aquaticQuantity","type":"uint256"},{"name":"_plantQuantity","type":"uint256"},{"name":"_referrer","type":"address"}],"name":"adoptAxies","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[{"name":"_class","type":"uint8"},{"name":"_deduction","type":"bool"}],"name":"totalAdoptedAxies","outputs":[{"name":"_number","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"uint8"}],"name":"priceIncrement","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"INITIAL_PRICE_INCREMENT","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"contractAddr","type":"address"}],"name":"reclaimContract","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_receiver","type":"address"},{"name":"_numMintedCredits","type":"uint256"}],"name":"mintRefCredits","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"unpause","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"CLASS_BEAST","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"redemptionAddress","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"numBountyCredits","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"paused","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"presaleContract","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_deduction","type":"bool"}],"name":"numRewardedAxies","outputs":[{"name":"_number","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"INITIAL_PRICE","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"CLASS_PLANT","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"uint8"}],"name":"currentPrice","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"pause","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_beastQuantity","type":"uint256"},{"name":"_aquaticQuantity","type":"uint256"},{"name":"_plantQuantity","type":"uint256"}],"name":"axiesPrice","outputs":[{"name":"_totalPrice","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"PRESALE_END_TIMESTAMP","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"reclaimEther","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"REF_CREDITS_PER_AXIE","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"MAX_TOTAL_ADOPTED_AXIES","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_receiver","type":"address"},{"name":"_beastQuantity","type":"uint256"},{"name":"_aquaticQuantity","type":"uint256"},{"name":"_plantQuantity","type":"uint256"}],"name":"redeemAdoptedAxies","outputs":[{"name":"","type":"uint256"},{"name":"","type":"uint256"},{"name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"CLASS_AQUATIC","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_presaleAddress","type":"address"}],"name":"initialize","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_class","type":"uint8"},{"name":"_deduction","type":"bool"}],"name":"numAdoptedAxies","outputs":[{"name":"_number","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_redemptionAddress","type":"address"}],"name":"setRedemptionAddress","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_receiver","type":"address"},{"name":"_quantity","type":"uint256"}],"name":"redeemRewardedAxies","outputs":[{"name":"_remainingQuantity","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_deduction","type":"bool"}],"name":"totalRewardedAxies","outputs":[{"name":"_number","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_deduction","type":"bool"}],"name":"numRefCredits","outputs":[{"name":"_number","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":true,"stateMutability":"payable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_adopter","type":"address"},{"indexed":true,"name":"_class","type":"uint8"},{"indexed":false,"name":"_quantity","type":"uint256"},{"indexed":true,"name":"_referrer","type":"address"}],"name":"AxiesAdopted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_receiver","type":"address"},{"indexed":false,"name":"_quantity","type":"uint256"}],"name":"AxiesRewarded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_receiver","type":"address"},{"indexed":true,"name":"_class","type":"uint8"},{"indexed":false,"name":"_quantity","type":"uint256"}],"name":"AdoptedAxiesRedeemed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_receiver","type":"address"},{"indexed":false,"name":"_quantity","type":"uint256"}],"name":"RewardedAxiesRedeemed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_receiver","type":"address"},{"indexed":false,"name":"_numMintedCredits","type":"uint256"}],"name":"RefCreditsMinted","type":"event"},{"anonymous":false,"inputs":[],"name":"Pause","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpause","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"},{"indexed":true,"name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"}]

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