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Outline

•  contract Ownable
•    - function owner()
•    - function isOwner()
•    - function renounceOwnership()
•    - function transferOwnership(address ne ...
•    - function _transferOwnership(address n ...
• interface ERC20
•    - function transfer(address to, uint256 ...
•    - function approve(address spender, uin ...
•    - function transferFrom(address from, a ...
•    - function totalSupply()
•    - function balanceOf(address who)
•    - function allowance(address owner, add ...
• library SafeMath
•    - function add(uint256 a, uint256 b)
•    - function sub(uint256 a, uint256 b)
•    - function mul(uint256 a, uint256 b)
•    - function div(uint256 a, uint256 b)
•    - function mod(uint256 a, uint256 b)
•    - function ceilingDiv(uint256 a, uint25 ...
•    - function subU64(uint64 a, uint64 b)
•    - function addU8(uint8 a, uint8 b)
•  contract KBDChestSale is *
•    - function setPartner(address _address, ...
•    - function setDiscount(uint256 _id, uin ...
•    - function setPriceOfEth(uint256 _price ...
•    - function getPriceOfEth()
•    - function setChestTypePricing(uint256 ...
•    - function purchaseChest(uint16 _chestT ...
•    - function getChestPrice(uint256 _chest ...
•    - function getChestPrice(uint8 _chestTy ...
•    - function _getReferralPercentage(addre ...
•    - function _purchaseChest(
•    - function withdrawBalance()

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/**
 *Submitted for verification at Etherscan.io on 2019-09-23
*/

pragma solidity ^0.5.0;

/**
 * @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 private _owner;

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

    /**
     * @dev The Ownable constructor sets the original `owner` of the contract to the sender
     * account.
     */
    constructor () internal {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), _owner);
    }

    /**
     * @return the address of the owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

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

    /**
     * @return true if `msg.sender` is the owner of the contract.
     */
    function isOwner() public view returns (bool) {
        return msg.sender == _owner;
    }

    /**
     * @dev Allows the current owner to relinquish control of the contract.
     * @notice Renouncing to ownership will leave the contract without an owner.
     * It will not be possible to call the functions with the `onlyOwner`
     * modifier anymore.
     */
    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @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) public onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers control of the contract to a newOwner.
     * @param newOwner The address to transfer ownership to.
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0));
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: contracts/KBDChestSale.sol

pragma solidity 0.5.0;


// https://github.com/ethereum/EIPs/issues/20

interface ERC20 {
    function transfer(address to, uint256 value) external returns (bool);

    function approve(address spender, uint256 value) external returns (bool);

    function transferFrom(address from, address to, uint256 value) external returns (bool);

    function totalSupply() external view returns (uint256);

    function balanceOf(address who) external view returns (uint256);

    function allowance(address owner, address spender) external view returns (uint256);

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

library SafeMath {
  function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
    c = a + b;
    require(c >= a);
  }

  function sub(uint256 a, uint256 b) internal pure returns (uint256 c) {
    require(b <= a);
    return a - b;
  }

  function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
    if (a == 0) {
      return 0;
    }

    c = a * b;
    require(c / a == b);
  }

  function div(uint256 a, uint256 b) internal pure returns (uint256 c) {
    // Since Solidity automatically asserts when dividing by 0,
    // but we only need it to revert.
    require(b > 0);
    return a / b;
  }

  function mod(uint256 a, uint256 b) internal pure returns (uint256 c) {
    // Same reason as `div`.
    require(b > 0);
    return a % b;
  }

  function ceilingDiv(uint256 a, uint256 b) internal pure returns (uint256 c) {
    return add(div(a, b), mod(a, b) > 0 ? 1 : 0);
  }

  function subU64(uint64 a, uint64 b) internal pure returns (uint64 c) {
    require(b <= a);
    return a - b;
  }

  function addU8(uint8 a, uint8 b) internal pure returns (uint8 c) {
    c = a + b;
    require(c >= a);
  }
}

/**
 * @dev KingdomsBeyond Founder Sale Smart contract
 * Facilitates the distribution of chests purchased 
 * Chests can be purchased with ETH natively or 
 * alternatively purchased with ERC20 Tokens via KyberSwap
 * or Fiat via NiftyGateway.
 */
contract KBDChestSale is
  Ownable
{
  using SafeMath for uint256;

  /**
   * @dev Event is broadcast whenever a chest is purchased. 
   */ 
  event ChestPurchased(
    uint16 _chestType,
    uint16 _chestAmount,
    address indexed _buyer,
    address indexed _referrer,
    uint256 _referralReward
  );

  struct Discount {
    uint256 blockNumber; 
    uint256 percentage;
  }
  
  event Swap(address indexed sender, ERC20 srcToken, ERC20 destToken);
  
  // Updated every day 
  uint256 ethPrice;
  
  mapping (uint256 => uint256) chestTypePricing;
  mapping (address => bool) partnerReferral;
  mapping (uint256 => Discount) discountMapping;    

  constructor() public {
    chestTypePricing[0] = 5; 
    chestTypePricing[1] = 20;
    chestTypePricing[2] = 50;
    ethPrice = 209;
  }
  
  function setPartner(address _address, bool _status) external onlyOwner{
      partnerReferral[_address] = _status;
  }
  
  function setDiscount(uint256 _id, uint256 _blockNumber, uint256 _percentage) external onlyOwner{
      Discount memory discount;
      discount.blockNumber = _blockNumber;
      discount.percentage = _percentage;
      discountMapping[_id] = discount;
  }
  
  // Sets the price of 1 Eth in volatile situations
  function setPriceOfEth(uint256 _price) external onlyOwner {
      ethPrice = _price;
  }
  
  function getPriceOfEth() external view returns (uint256) {
      return ethPrice;
  }
  
  function setChestTypePricing(uint256 _chestType, uint256 _chestPrice) external onlyOwner {
      chestTypePricing[_chestType] = _chestPrice;
  }
  
  function purchaseChest(uint16 _chestType, uint16 _chestAmount, uint256 _discountId, address payable _referrer) external payable {
        _purchaseChest(msg.sender, _referrer, _chestType, _chestAmount, msg.value, _discountId);
  } 
  
  // The cost of the chest in Wei
  function getChestPrice(uint256 _chestType, uint256 _discountId) public view returns (uint256) {
      uint256 chestPrice = chestTypePricing[_chestType];
      require(chestPrice != 0, "Invalid chest");
      
      Discount memory discount = discountMapping[_discountId];

      if (discount.percentage != 0) {
        require(discount.blockNumber >= block.number, "Discount has expired");
        return ((chestPrice).mul(discount.percentage).div(10000)).mul(1000000000000000000).div(ethPrice);
      } 
      
      return (chestPrice).mul(1000000000000000000).div(ethPrice);
  }
  
  function getChestPrice(uint8 _chestType, uint8 _chestAmount, uint256 _discountId) public view returns (uint256) {
      require(_chestAmount < 256, "Invalid Amount");
      
      return getChestPrice(_chestType, _discountId) * _chestAmount;
  }

  function _getReferralPercentage(address _referrer, address _owner) internal view returns (uint256 _percentage) {
      if (_referrer != _owner && _referrer != address (0)) {
          if (partnerReferral[_referrer]) {
              return 3000;
          } else {
              return 1000;
          }
      } 
      return 0;
  }
  
  function _purchaseChest(
      address payable _buyer, 
      address payable _referrer, 
      uint256 _chestType,
      uint256 _chestAmount,
      uint256 _ethAmount,
      uint256 _discountId
  ) internal {
    uint256 _totalPrice = getChestPrice(uint8(_chestType), uint8(_chestAmount), _discountId);

    // Check if we received enough payment.
    require(_ethAmount >= _totalPrice, "Not enough ether");

    // Send back the ETH change, if there is any.
    if (_ethAmount > _totalPrice) {
      _buyer.transfer(_ethAmount - _totalPrice);
    }

    uint256 _referralReward = _totalPrice
      .mul(_getReferralPercentage(_referrer, _buyer))
      .div(10000);

    emit ChestPurchased(uint16(_chestType), uint16(_chestAmount), _buyer, _referrer, _referralReward);

    /// @dev If the referral reward cannot be sent because of a referrer's fault, set it to 0.
    if (_referralReward > 0 && !_referrer.send(_referralReward)) {
      _referralReward = 0;
    }
  }
  
  /// @dev Withdraw function to withdraw the earnings 
  function withdrawBalance()
  external onlyOwner {
    msg.sender.transfer(address(this).balance);
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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