pragma solidity ^0.4.18;

// File: contracts/KnowsConstants.sol

// These are the specifications of the contract, unlikely to change
contract KnowsConstants {
    // The fixed USD price per BNTY
    uint public constant FIXED_PRESALE_USD_ETHER_PRICE = 355;
    uint public constant MICRO_DOLLARS_PER_BNTY_MAINSALE = 16500;
    uint public constant MICRO_DOLLARS_PER_BNTY_PRESALE = 13200;

    // Contribution constants
    uint public constant HARD_CAP_USD = 1500000;                           // in USD the maximum total collected amount
    uint public constant MAXIMUM_CONTRIBUTION_WHITELIST_PERIOD_USD = 1500; // in USD the maximum contribution amount during the whitelist period
    uint public constant MAXIMUM_CONTRIBUTION_LIMITED_PERIOD_USD = 10000;  // in USD the maximum contribution amount after the whitelist period ends
    uint public constant MAX_GAS_PRICE = 70 * (10 ** 9);                   // Max gas price of 70 gwei
    uint public constant MAX_GAS = 500000;                                 // Max gas that can be sent with tx

    // Time constants
    uint public constant SALE_START_DATE = 1513346400;                    // in unix timestamp Dec 15th @ 15:00 CET
    uint public constant WHITELIST_END_DATE = SALE_START_DATE + 24 hours; // End whitelist 24 hours after sale start date/time
    uint public constant LIMITS_END_DATE = SALE_START_DATE + 48 hours;    // End all limits 48 hours after the sale start date
    uint public constant SALE_END_DATE = SALE_START_DATE + 4 weeks;       // end sale in four weeks
    uint public constant UNFREEZE_DATE = SALE_START_DATE + 76 weeks;      // Bounty0x Reserve locked for 18 months

    function KnowsConstants() public {}
}

// File: zeppelin-solidity/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 pure returns (uint256) {
    if (a == 0) {
      return 0;
    }
    uint256 c = a * b;
    assert(c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal pure 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 pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

// File: zeppelin-solidity/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() public {
    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) public onlyOwner {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

// File: zeppelin-solidity/contracts/token/ERC20Basic.sol

/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) public view returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}

// File: zeppelin-solidity/contracts/token/ERC20.sol

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) public view returns (uint256);
  function transferFrom(address from, address to, uint256 value) public returns (bool);
  function approve(address spender, uint256 value) public returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: zeppelin-solidity/contracts/token/SafeERC20.sol

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure.
 * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
  function safeTransfer(ERC20Basic token, address to, uint256 value) internal {
    assert(token.transfer(to, value));
  }

  function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal {
    assert(token.transferFrom(from, to, value));
  }

  function safeApprove(ERC20 token, address spender, uint256 value) internal {
    assert(token.approve(spender, value));
  }
}

// File: zeppelin-solidity/contracts/token/TokenVesting.sol

/**
 * @title TokenVesting
 * @dev A token holder contract that can release its token balance gradually like a
 * typical vesting scheme, with a cliff and vesting period. Optionally revocable by the
 * owner.
 */
contract TokenVesting is Ownable {
  using SafeMath for uint256;
  using SafeERC20 for ERC20Basic;

  event Released(uint256 amount);
  event Revoked();

  // beneficiary of tokens after they are released
  address public beneficiary;

  uint256 public cliff;
  uint256 public start;
  uint256 public duration;

  bool public revocable;

  mapping (address => uint256) public released;
  mapping (address => bool) public revoked;

  /**
   * @dev Creates a vesting contract that vests its balance of any ERC20 token to the
   * _beneficiary, gradually in a linear fashion until _start + _duration. By then all
   * of the balance will have vested.
   * @param _beneficiary address of the beneficiary to whom vested tokens are transferred
   * @param _cliff duration in seconds of the cliff in which tokens will begin to vest
   * @param _duration duration in seconds of the period in which the tokens will vest
   * @param _revocable whether the vesting is revocable or not
   */
  function TokenVesting(address _beneficiary, uint256 _start, uint256 _cliff, uint256 _duration, bool _revocable) public {
    require(_beneficiary != address(0));
    require(_cliff <= _duration);

    beneficiary = _beneficiary;
    revocable = _revocable;
    duration = _duration;
    cliff = _start.add(_cliff);
    start = _start;
  }

  /**
   * @notice Transfers vested tokens to beneficiary.
   * @param token ERC20 token which is being vested
   */
  function release(ERC20Basic token) public {
    uint256 unreleased = releasableAmount(token);

    require(unreleased > 0);

    released[token] = released[token].add(unreleased);

    token.safeTransfer(beneficiary, unreleased);

    Released(unreleased);
  }

  /**
   * @notice Allows the owner to revoke the vesting. Tokens already vested
   * remain in the contract, the rest are returned to the owner.
   * @param token ERC20 token which is being vested
   */
  function revoke(ERC20Basic token) public onlyOwner {
    require(revocable);
    require(!revoked[token]);

    uint256 balance = token.balanceOf(this);

    uint256 unreleased = releasableAmount(token);
    uint256 refund = balance.sub(unreleased);

    revoked[token] = true;

    token.safeTransfer(owner, refund);

    Revoked();
  }

  /**
   * @dev Calculates the amount that has already vested but hasn't been released yet.
   * @param token ERC20 token which is being vested
   */
  function releasableAmount(ERC20Basic token) public view returns (uint256) {
    return vestedAmount(token).sub(released[token]);
  }

  /**
   * @dev Calculates the amount that has already vested.
   * @param token ERC20 token which is being vested
   */
  function vestedAmount(ERC20Basic token) public view returns (uint256) {
    uint256 currentBalance = token.balanceOf(this);
    uint256 totalBalance = currentBalance.add(released[token]);

    if (now < cliff) {
      return 0;
    } else if (now >= start.add(duration) || revoked[token]) {
      return totalBalance;
    } else {
      return totalBalance.mul(now.sub(start)).div(duration);
    }
  }
}

// File: contracts/Bounty0xTokenVesting.sol

contract Bounty0xTokenVesting is KnowsConstants, TokenVesting {
    function Bounty0xTokenVesting(address _beneficiary, uint durationWeeks)
        TokenVesting(_beneficiary, WHITELIST_END_DATE, 0, durationWeeks * 1 weeks, false)
        public
    {
    }
}

// File: contracts/AddressWhitelist.sol

// A simple contract that stores a whitelist of addresses, which the owner may update
contract AddressWhitelist is Ownable {
    // the addresses that are included in the whitelist
    mapping (address => bool) public whitelisted;

    function AddressWhitelist() public {
    }

    function isWhitelisted(address addr) view public returns (bool) {
        return whitelisted[addr];
    }

    event LogWhitelistAdd(address indexed addr);

    // add these addresses to the whitelist
    function addToWhitelist(address[] addresses) public onlyOwner returns (bool) {
        for (uint i = 0; i < addresses.length; i++) {
            if (!whitelisted[addresses[i]]) {
                whitelisted[addresses[i]] = true;
                LogWhitelistAdd(addresses[i]);
            }
        }

        return true;
    }

    event LogWhitelistRemove(address indexed addr);

    // remove these addresses from the whitelist
    function removeFromWhitelist(address[] addresses) public onlyOwner returns (bool) {
        for (uint i = 0; i < addresses.length; i++) {
            if (whitelisted[addresses[i]]) {
                whitelisted[addresses[i]] = false;
                LogWhitelistRemove(addresses[i]);
            }
        }

        return true;
    }
}

// File: contracts/KnowsTime.sol

contract KnowsTime {
    function KnowsTime() public {
    }

    function currentTime() public view returns (uint) {
        return now;
    }
}

// File: contracts/BntyExchangeRateCalculator.sol

// This contract does the math to figure out the BNTY paid per WEI, based on the USD ether price
contract BntyExchangeRateCalculator is KnowsTime, Ownable {
    using SafeMath for uint;

    uint public constant WEI_PER_ETH = 10 ** 18;

    uint public constant MICRODOLLARS_PER_DOLLAR = 10 ** 6;

    uint public bntyMicrodollarPrice;

    uint public USDEtherPrice;

    uint public fixUSDPriceTime;

    // a microdollar is one millionth of a dollar, or one ten-thousandth of a cent
    function BntyExchangeRateCalculator(uint _bntyMicrodollarPrice, uint _USDEtherPrice, uint _fixUSDPriceTime)
        public
    {
        require(_bntyMicrodollarPrice > 0);
        require(_USDEtherPrice > 0);

        bntyMicrodollarPrice = _bntyMicrodollarPrice;
        fixUSDPriceTime = _fixUSDPriceTime;
        USDEtherPrice = _USDEtherPrice;
    }

    // the owner can change the usd ether price
    function setUSDEtherPrice(uint _USDEtherPrice) onlyOwner public {
        require(currentTime() < fixUSDPriceTime);
        require(_USDEtherPrice > 0);

        USDEtherPrice = _USDEtherPrice;
    }

    // returns the number of wei some amount of usd
    function usdToWei(uint usd) view public returns (uint) {
        return WEI_PER_ETH.mul(usd).div(USDEtherPrice);
    }

    // returns the number of bnty per some amount in wei
    function weiToBnty(uint amtWei) view public returns (uint) {
        return USDEtherPrice.mul(MICRODOLLARS_PER_DOLLAR).mul(amtWei).div(bntyMicrodollarPrice);
    }
}

// File: minimetoken/contracts/Controlled.sol

contract Controlled {
    /// @notice The address of the controller is the only address that can call
    ///  a function with this modifier
    modifier onlyController { require(msg.sender == controller); _; }

    address public controller;

    function Controlled() public { controller = msg.sender;}

    /// @notice Changes the controller of the contract
    /// @param _newController The new controller of the contract
    function changeController(address _newController) public onlyController {
        controller = _newController;
    }
}

// File: minimetoken/contracts/TokenController.sol

/// @dev The token controller contract must implement these functions
contract TokenController {
    /// @notice Called when `_owner` sends ether to the MiniMe Token contract
    /// @param _owner The address that sent the ether to create tokens
    /// @return True if the ether is accepted, false if it throws
    function proxyPayment(address _owner) public payable returns(bool);

    /// @notice Notifies the controller about a token transfer allowing the
    ///  controller to react if desired
    /// @param _from The origin of the transfer
    /// @param _to The destination of the transfer
    /// @param _amount The amount of the transfer
    /// @return False if the controller does not authorize the transfer
    function onTransfer(address _from, address _to, uint _amount) public returns(bool);

    /// @notice Notifies the controller about an approval allowing the
    ///  controller to react if desired
    /// @param _owner The address that calls `approve()`
    /// @param _spender The spender in the `approve()` call
    /// @param _amount The amount in the `approve()` call
    /// @return False if the controller does not authorize the approval
    function onApprove(address _owner, address _spender, uint _amount) public
        returns(bool);
}

// File: minimetoken/contracts/MiniMeToken.sol

/*
    Copyright 2016, Jordi Baylina

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/// @title MiniMeToken Contract
/// @author Jordi Baylina
/// @dev This token contract's goal is to make it easy for anyone to clone this
///  token using the token distribution at a given block, this will allow DAO's
///  and DApps to upgrade their features in a decentralized manner without
///  affecting the original token
/// @dev It is ERC20 compliant, but still needs to under go further testing.




contract ApproveAndCallFallBack {
    function receiveApproval(address from, uint256 _amount, address _token, bytes _data) public;
}

/// @dev The actual token contract, the default controller is the msg.sender
///  that deploys the contract, so usually this token will be deployed by a
///  token controller contract, which Giveth will call a "Campaign"
contract MiniMeToken is Controlled {

    string public name;                //The Token's name: e.g. DigixDAO Tokens
    uint8 public decimals;             //Number of decimals of the smallest unit
    string public symbol;              //An identifier: e.g. REP
    string public version = 'MMT_0.2'; //An arbitrary versioning scheme


    /// @dev `Checkpoint` is the structure that attaches a block number to a
    ///  given value, the block number attached is the one that last changed the
    ///  value
    struct  Checkpoint {

        // `fromBlock` is the block number that the value was generated from
        uint128 fromBlock;

        // `value` is the amount of tokens at a specific block number
        uint128 value;
    }

    // `parentToken` is the Token address that was cloned to produce this token;
    //  it will be 0x0 for a token that was not cloned
    MiniMeToken public parentToken;

    // `parentSnapShotBlock` is the block number from the Parent Token that was
    //  used to determine the initial distribution of the Clone Token
    uint public parentSnapShotBlock;

    // `creationBlock` is the block number that the Clone Token was created
    uint public creationBlock;

    // `balances` is the map that tracks the balance of each address, in this
    //  contract when the balance changes the block number that the change
    //  occurred is also included in the map
    mapping (address => Checkpoint[]) balances;

    // `allowed` tracks any extra transfer rights as in all ERC20 tokens
    mapping (address => mapping (address => uint256)) allowed;

    // Tracks the history of the `totalSupply` of the token
    Checkpoint[] totalSupplyHistory;

    // Flag that determines if the token is transferable or not.
    bool public transfersEnabled;

    // The factory used to create new clone tokens
    MiniMeTokenFactory public tokenFactory;

////////////////
// Constructor
////////////////

    /// @notice Constructor to create a MiniMeToken
    /// @param _tokenFactory The address of the MiniMeTokenFactory contract that
    ///  will create the Clone token contracts, the token factory needs to be
    ///  deployed first
    /// @param _parentToken Address of the parent token, set to 0x0 if it is a
    ///  new token
    /// @param _parentSnapShotBlock Block of the parent token that will
    ///  determine the initial distribution of the clone token, set to 0 if it
    ///  is a new token
    /// @param _tokenName Name of the new token
    /// @param _decimalUnits Number of decimals of the new token
    /// @param _tokenSymbol Token Symbol for the new token
    /// @param _transfersEnabled If true, tokens will be able to be transferred
    function MiniMeToken(
        address _tokenFactory,
        address _parentToken,
        uint _parentSnapShotBlock,
        string _tokenName,
        uint8 _decimalUnits,
        string _tokenSymbol,
        bool _transfersEnabled
    ) public {
        tokenFactory = MiniMeTokenFactory(_tokenFactory);
        name = _tokenName;                                 // Set the name
        decimals = _decimalUnits;                          // Set the decimals
        symbol = _tokenSymbol;                             // Set the symbol
        parentToken = MiniMeToken(_parentToken);
        parentSnapShotBlock = _parentSnapShotBlock;
        transfersEnabled = _transfersEnabled;
        creationBlock = block.number;
    }


///////////////////
// ERC20 Methods
///////////////////

    /// @notice Send `_amount` tokens to `_to` from `msg.sender`
    /// @param _to The address of the recipient
    /// @param _amount The amount of tokens to be transferred
    /// @return Whether the transfer was successful or not
    function transfer(address _to, uint256 _amount) public returns (bool success) {
        require(transfersEnabled);
        return doTransfer(msg.sender, _to, _amount);
    }

    /// @notice Send `_amount` tokens to `_to` from `_from` on the condition it
    ///  is approved by `_from`
    /// @param _from The address holding the tokens being transferred
    /// @param _to The address of the recipient
    /// @param _amount The amount of tokens to be transferred
    /// @return True if the transfer was successful
    function transferFrom(address _from, address _to, uint256 _amount
    ) public returns (bool success) {

        // The controller of this contract can move tokens around at will,

        //  controller of this contract, which in most situations should be
        //  another open source smart contract or 0x0
        if (msg.sender != controller) {
            require(transfersEnabled);

            // The standard ERC 20 transferFrom functionality
            if (allowed[_from][msg.sender] < _amount) return false;
            allowed[_from][msg.sender] -= _amount;
        }
        return doTransfer(_from, _to, _amount);
    }

    /// @dev This is the actual transfer function in the token contract, it can
    ///  only be called by other functions in this contract.
    /// @param _from The address holding the tokens being transferred
    /// @param _to The address of the recipient
    /// @param _amount The amount of tokens to be transferred
    /// @return True if the transfer was successful
    function doTransfer(address _from, address _to, uint _amount
    ) internal returns(bool) {

           if (_amount == 0) {
               return true;
           }

           require(parentSnapShotBlock < block.number);

           // Do not allow transfer to 0x0 or the token contract itself
           require((_to != 0) && (_to != address(this)));

           // If the amount being transfered is more than the balance of the
           //  account the transfer returns false
           var previousBalanceFrom = balanceOfAt(_from, block.number);
           if (previousBalanceFrom < _amount) {
               return false;
           }

           // Alerts the token controller of the transfer
           if (isContract(controller)) {
               require(TokenController(controller).onTransfer(_from, _to, _amount));
           }

           // First update the balance array with the new value for the address
           //  sending the tokens
           updateValueAtNow(balances[_from], previousBalanceFrom - _amount);

           // Then update the balance array with the new value for the address
           //  receiving the tokens
           var previousBalanceTo = balanceOfAt(_to, block.number);
           require(previousBalanceTo + _amount >= previousBalanceTo); // Check for overflow
           updateValueAtNow(balances[_to], previousBalanceTo + _amount);

           // An event to make the transfer easy to find on the blockchain
           Transfer(_from, _to, _amount);

           return true;
    }

    /// @param _owner The address that's balance is being requested
    /// @return The balance of `_owner` at the current block
    function balanceOf(address _owner) public constant returns (uint256 balance) {
        return balanceOfAt(_owner, block.number);
    }

    /// @notice `msg.sender` approves `_spender` to spend `_amount` tokens on
    ///  its behalf. This is a modified version of the ERC20 approve function
    ///  to be a little bit safer
    /// @param _spender The address of the account able to transfer the tokens
    /// @param _amount The amount of tokens to be approved for transfer
    /// @return True if the approval was successful
    function approve(address _spender, uint256 _amount) public returns (bool success) {
        require(transfersEnabled);

        // To change the approve amount you first have to reduce the addresses`
        //  allowance to zero by calling `approve(_spender,0)` if it is not
        //  already 0 to mitigate the race condition described here:
        //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
        require((_amount == 0) || (allowed[msg.sender][_spender] == 0));

        // Alerts the token controller of the approve function call
        if (isContract(controller)) {
            require(TokenController(controller).onApprove(msg.sender, _spender, _amount));
        }

        allowed[msg.sender][_spender] = _amount;
        Approval(msg.sender, _spender, _amount);
        return true;
    }

    /// @dev This function makes it easy to read the `allowed[]` map
    /// @param _owner The address of the account that owns the token
    /// @param _spender The address of the account able to transfer the tokens
    /// @return Amount of remaining tokens of _owner that _spender is allowed
    ///  to spend
    function allowance(address _owner, address _spender
    ) public constant returns (uint256 remaining) {
        return allowed[_owner][_spender];
    }

    /// @notice `msg.sender` approves `_spender` to send `_amount` tokens on
    ///  its behalf, and then a function is triggered in the contract that is
    ///  being approved, `_spender`. This allows users to use their tokens to
    ///  interact with contracts in one function call instead of two
    /// @param _spender The address of the contract able to transfer the tokens
    /// @param _amount The amount of tokens to be approved for transfer
    /// @return True if the function call was successful
    function approveAndCall(address _spender, uint256 _amount, bytes _extraData
    ) public returns (bool success) {
        require(approve(_spender, _amount));

        ApproveAndCallFallBack(_spender).receiveApproval(
            msg.sender,
            _amount,
            this,
            _extraData
        );

        return true;
    }

    /// @dev This function makes it easy to get the total number of tokens
    /// @return The total number of tokens
    function totalSupply() public constant returns (uint) {
        return totalSupplyAt(block.number);
    }


////////////////
// Query balance and totalSupply in History
////////////////

    /// @dev Queries the balance of `_owner` at a specific `_blockNumber`
    /// @param _owner The address from which the balance will be retrieved
    /// @param _blockNumber The block number when the balance is queried
    /// @return The balance at `_blockNumber`
    function balanceOfAt(address _owner, uint _blockNumber) public constant
        returns (uint) {

        // These next few lines are used when the balance of the token is
        //  requested before a check point was ever created for this token, it
        //  requires that the `parentToken.balanceOfAt` be queried at the
        //  genesis block for that token as this contains initial balance of
        //  this token
        if ((balances[_owner].length == 0)
            || (balances[_owner][0].fromBlock > _blockNumber)) {
            if (address(parentToken) != 0) {
                return parentToken.balanceOfAt(_owner, min(_blockNumber, parentSnapShotBlock));
            } else {
                // Has no parent
                return 0;
            }

        // This will return the expected balance during normal situations
        } else {
            return getValueAt(balances[_owner], _blockNumber);
        }
    }

    /// @notice Total amount of tokens at a specific `_blockNumber`.
    /// @param _blockNumber The block number when the totalSupply is queried
    /// @return The total amount of tokens at `_blockNumber`
    function totalSupplyAt(uint _blockNumber) public constant returns(uint) {

        // These next few lines are used when the totalSupply of the token is
        //  requested before a check point was ever created for this token, it
        //  requires that the `parentToken.totalSupplyAt` be queried at the
        //  genesis block for this token as that contains totalSupply of this
        //  token at this block number.
        if ((totalSupplyHistory.length == 0)
            || (totalSupplyHistory[0].fromBlock > _blockNumber)) {
            if (address(parentToken) != 0) {
                return parentToken.totalSupplyAt(min(_blockNumber, parentSnapShotBlock));
            } else {
                return 0;
            }

        // This will return the expected totalSupply during normal situations
        } else {
            return getValueAt(totalSupplyHistory, _blockNumber);
        }
    }

////////////////
// Clone Token Method
////////////////

    /// @notice Creates a new clone token with the initial distribution being
    ///  this token at `_snapshotBlock`
    /// @param _cloneTokenName Name of the clone token
    /// @param _cloneDecimalUnits Number of decimals of the smallest unit
    /// @param _cloneTokenSymbol Symbol of the clone token
    /// @param _snapshotBlock Block when the distribution of the parent token is
    ///  copied to set the initial distribution of the new clone token;
    ///  if the block is zero than the actual block, the current block is used
    /// @param _transfersEnabled True if transfers are allowed in the clone
    /// @return The address of the new MiniMeToken Contract
    function createCloneToken(
        string _cloneTokenName,
        uint8 _cloneDecimalUnits,
        string _cloneTokenSymbol,
        uint _snapshotBlock,
        bool _transfersEnabled
        ) public returns(address) {
        if (_snapshotBlock == 0) _snapshotBlock = block.number;
        MiniMeToken cloneToken = tokenFactory.createCloneToken(
            this,
            _snapshotBlock,
            _cloneTokenName,
            _cloneDecimalUnits,
            _cloneTokenSymbol,
            _transfersEnabled
            );

        cloneToken.changeController(msg.sender);

        // An event to make the token easy to find on the blockchain
        NewCloneToken(address(cloneToken), _snapshotBlock);
        return address(cloneToken);
    }

////////////////
// Generate and destroy tokens
////////////////

    /// @notice Generates `_amount` tokens that are assigned to `_owner`
    /// @param _owner The address that will be assigned the new tokens
    /// @param _amount The quantity of tokens generated
    /// @return True if the tokens are generated correctly
    function generateTokens(address _owner, uint _amount
    ) public onlyController returns (bool) {
        uint curTotalSupply = totalSupply();
        require(curTotalSupply + _amount >= curTotalSupply); // Check for overflow
        uint previousBalanceTo = balanceOf(_owner);
        require(previousBalanceTo + _amount >= previousBalanceTo); // Check for overflow
        updateValueAtNow(totalSupplyHistory, curTotalSupply + _amount);
        updateValueAtNow(balances[_owner], previousBalanceTo + _amount);
        Transfer(0, _owner, _amount);
        return true;
    }


    /// @notice Burns `_amount` tokens from `_owner`
    /// @param _owner The address that will lose the tokens
    /// @param _amount The quantity of tokens to burn
    /// @return True if the tokens are burned correctly
    function destroyTokens(address _owner, uint _amount
    ) onlyController public returns (bool) {
        uint curTotalSupply = totalSupply();
        require(curTotalSupply >= _amount);
        uint previousBalanceFrom = balanceOf(_owner);
        require(previousBalanceFrom >= _amount);
        updateValueAtNow(totalSupplyHistory, curTotalSupply - _amount);
        updateValueAtNow(balances[_owner], previousBalanceFrom - _amount);
        Transfer(_owner, 0, _amount);
        return true;
    }

////////////////
// Enable tokens transfers
////////////////


    /// @notice Enables token holders to transfer their tokens freely if true
    /// @param _transfersEnabled True if transfers are allowed in the clone
    function enableTransfers(bool _transfersEnabled) public onlyController {
        transfersEnabled = _transfersEnabled;
    }

////////////////
// Internal helper functions to query and set a value in a snapshot array
////////////////

    /// @dev `getValueAt` retrieves the number of tokens at a given block number
    /// @param checkpoints The history of values being queried
    /// @param _block The block number to retrieve the value at
    /// @return The number of tokens being queried
    function getValueAt(Checkpoint[] storage checkpoints, uint _block
    ) constant internal returns (uint) {
        if (checkpoints.length == 0) return 0;

        // Shortcut for the actual value
        if (_block >= checkpoints[checkpoints.length-1].fromBlock)
            return checkpoints[checkpoints.length-1].value;
        if (_block < checkpoints[0].fromBlock) return 0;

        // Binary search of the value in the array
        uint min = 0;
        uint max = checkpoints.length-1;
        while (max > min) {
            uint mid = (max + min + 1)/ 2;
            if (checkpoints[mid].fromBlock<=_block) {
                min = mid;
            } else {
                max = mid-1;
            }
        }
        return checkpoints[min].value;
    }

    /// @dev `updateValueAtNow` used to update the `balances` map and the
    ///  `totalSupplyHistory`
    /// @param checkpoints The history of data being updated
    /// @param _value The new number of tokens
    function updateValueAtNow(Checkpoint[] storage checkpoints, uint _value
    ) internal  {
        if ((checkpoints.length == 0)
        || (checkpoints[checkpoints.length -1].fromBlock < block.number)) {
               Checkpoint storage newCheckPoint = checkpoints[ checkpoints.length++ ];
               newCheckPoint.fromBlock =  uint128(block.number);
               newCheckPoint.value = uint128(_value);
           } else {
               Checkpoint storage oldCheckPoint = checkpoints[checkpoints.length-1];
               oldCheckPoint.value = uint128(_value);
           }
    }

    /// @dev Internal function to determine if an address is a contract
    /// @param _addr The address being queried
    /// @return True if `_addr` is a contract
    function isContract(address _addr) constant internal returns(bool) {
        uint size;
        if (_addr == 0) return false;
        assembly {
            size := extcodesize(_addr)
        }
        return size>0;
    }

    /// @dev Helper function to return a min betwen the two uints
    function min(uint a, uint b) pure internal returns (uint) {
        return a < b ? a : b;
    }

    /// @notice The fallback function: If the contract's controller has not been
    ///  set to 0, then the `proxyPayment` method is called which relays the
    ///  ether and creates tokens as described in the token controller contract
    function () public payable {
        require(isContract(controller));
        require(TokenController(controller).proxyPayment.value(msg.value)(msg.sender));
    }

//////////
// Safety Methods
//////////

    /// @notice This method can be used by the controller to extract mistakenly
    ///  sent tokens to this contract.
    /// @param _token The address of the token contract that you want to recover
    ///  set to 0 in case you want to extract ether.
    function claimTokens(address _token) public onlyController {
        if (_token == 0x0) {
            controller.transfer(this.balance);
            return;
        }

        MiniMeToken token = MiniMeToken(_token);
        uint balance = token.balanceOf(this);
        token.transfer(controller, balance);
        ClaimedTokens(_token, controller, balance);
    }

////////////////
// Events
////////////////
    event ClaimedTokens(address indexed _token, address indexed _controller, uint _amount);
    event Transfer(address indexed _from, address indexed _to, uint256 _amount);
    event NewCloneToken(address indexed _cloneToken, uint _snapshotBlock);
    event Approval(
        address indexed _owner,
        address indexed _spender,
        uint256 _amount
        );

}


////////////////
// MiniMeTokenFactory
////////////////

/// @dev This contract is used to generate clone contracts from a contract.
///  In solidity this is the way to create a contract from a contract of the
///  same class
contract MiniMeTokenFactory {

    /// @notice Update the DApp by creating a new token with new functionalities
    ///  the msg.sender becomes the controller of this clone token
    /// @param _parentToken Address of the token being cloned
    /// @param _snapshotBlock Block of the parent token that will
    ///  determine the initial distribution of the clone token
    /// @param _tokenName Name of the new token
    /// @param _decimalUnits Number of decimals of the new token
    /// @param _tokenSymbol Token Symbol for the new token
    /// @param _transfersEnabled If true, tokens will be able to be transferred
    /// @return The address of the new token contract
    function createCloneToken(
        address _parentToken,
        uint _snapshotBlock,
        string _tokenName,
        uint8 _decimalUnits,
        string _tokenSymbol,
        bool _transfersEnabled
    ) public returns (MiniMeToken) {
        MiniMeToken newToken = new MiniMeToken(
            this,
            _parentToken,
            _snapshotBlock,
            _tokenName,
            _decimalUnits,
            _tokenSymbol,
            _transfersEnabled
            );

        newToken.changeController(msg.sender);
        return newToken;
    }
}

// File: contracts/Bounty0xToken.sol

contract Bounty0xToken is MiniMeToken {
    function Bounty0xToken(address _tokenFactory)
        MiniMeToken(
            _tokenFactory,
            0x0,                        // no parent token
            0,                          // no snapshot block number from parent
            "Bounty0x Token",           // Token name
            18   ,                      // Decimals
            "BNTY",                     // Symbol
            false                       // Disable transfers
        )
        public
    {
    }

    // generate tokens for many addresses with a single transaction
    function generateTokensAll(address[] _owners, uint[] _amounts) onlyController public {
        require(_owners.length == _amounts.length);

        for (uint i = 0; i < _owners.length; i++) {
            require(generateTokens(_owners[i], _amounts[i]));
        }
    }
}

// File: contracts/interfaces/Bounty0xPresaleI.sol

/**
 * This interface describes the only function we will be calling from the Bounty0xPresaleI contract
 */
interface Bounty0xPresaleI {
    function balanceOf(address addr) public returns (uint balance);
}

// File: zeppelin-solidity/contracts/math/Math.sol

/**
 * @title Math
 * @dev Assorted math operations
 */

library Math {
  function max64(uint64 a, uint64 b) internal pure returns (uint64) {
    return a >= b ? a : b;
  }

  function min64(uint64 a, uint64 b) internal pure returns (uint64) {
    return a < b ? a : b;
  }

  function max256(uint256 a, uint256 b) internal pure returns (uint256) {
    return a >= b ? a : b;
  }

  function min256(uint256 a, uint256 b) internal pure returns (uint256) {
    return a < b ? a : b;
  }
}

// File: contracts/Bounty0xPresaleDistributor.sol

/*
This contract manages compensation of the presale investors, based on the contribution balances recorded in the presale
contract.
*/
contract Bounty0xPresaleDistributor is KnowsConstants, BntyExchangeRateCalculator {
    using SafeMath for uint;

    Bounty0xPresaleI public deployedPresaleContract;
    Bounty0xToken public bounty0xToken;

    mapping(address => uint) public tokensPaid;

    function Bounty0xPresaleDistributor(Bounty0xToken _bounty0xToken, Bounty0xPresaleI _deployedPresaleContract)
        BntyExchangeRateCalculator(MICRO_DOLLARS_PER_BNTY_PRESALE, FIXED_PRESALE_USD_ETHER_PRICE, 0)
        public
    {
        bounty0xToken = _bounty0xToken;
        deployedPresaleContract = _deployedPresaleContract;
    }

    event OnPreSaleBuyerCompensated(address indexed contributor, uint numTokens);

    /**
     * Compensate the presale investors at the addresses provider based on their contributions during the presale
     */
    function compensatePreSaleInvestors(address[] preSaleInvestors) public {
        // iterate through each investor
        for (uint i = 0; i < preSaleInvestors.length; i++) {
            address investorAddress = preSaleInvestors[i];

            // the deployed presale contract tracked the balance of each contributor
            uint weiContributed = deployedPresaleContract.balanceOf(investorAddress);

            // they contributed and haven't been paid
            if (weiContributed > 0 && tokensPaid[investorAddress] == 0) {
                // convert the amount of wei they contributed to the bnty
                uint bntyCompensation = Math.min256(weiToBnty(weiContributed), bounty0xToken.balanceOf(this));

                // mark them paid first
                tokensPaid[investorAddress] = bntyCompensation;

                // transfer tokens to presale contributor address
                require(bounty0xToken.transfer(investorAddress, bntyCompensation));

                // log the event
                OnPreSaleBuyerCompensated(investorAddress, bntyCompensation);
            }
        }
    }
}

// File: contracts/Bounty0xReserveHolder.sol

/**
 * @title Bounty0xReserveHolder
 * @dev Bounty0xReserveHolder is a token holder contract that will allow a
 * beneficiary to extract the tokens after a given release time
 */
contract Bounty0xReserveHolder is KnowsConstants, KnowsTime {
    // Bounty0xToken address
    Bounty0xToken public token;

    // beneficiary of tokens after they are released
    address public beneficiary;

    function Bounty0xReserveHolder(Bounty0xToken _token, address _beneficiary) public {
        require(_token != address(0));
        require(_beneficiary != address(0));

        token = _token;
        beneficiary = _beneficiary;
    }

    /**
     * @notice Transfers tokens held by timelock to beneficiary.
     */
    function release() public {
        require(currentTime() >= UNFREEZE_DATE);

        uint amount = token.balanceOf(this);
        require(amount > 0);

        require(token.transfer(beneficiary, amount));
    }
}

// File: zeppelin-solidity/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: contracts/Bounty0xCrowdsale.sol

contract Bounty0xCrowdsale is KnowsTime, KnowsConstants, Ownable, BntyExchangeRateCalculator, AddressWhitelist, Pausable {
    using SafeMath for uint;

    // Crowdsale contracts
    Bounty0xToken public bounty0xToken;                                 // Reward tokens to compensate in

    // Contribution amounts
    mapping (address => uint) public contributionAmounts;            // The amount that each address has contributed
    uint public totalContributions;                                  // Total contributions given

    // Events
    event OnContribution(address indexed contributor, bool indexed duringWhitelistPeriod, uint indexed contributedWei, uint bntyAwarded, uint refundedWei);
    event OnWithdraw(address to, uint amount);

    function Bounty0xCrowdsale(Bounty0xToken _bounty0xToken, uint _USDEtherPrice)
        BntyExchangeRateCalculator(MICRO_DOLLARS_PER_BNTY_MAINSALE, _USDEtherPrice, SALE_START_DATE)
        public
    {
        bounty0xToken = _bounty0xToken;
    }

    // the crowdsale owner may withdraw any amount of ether from this contract at any time
    function withdraw(uint amount) public onlyOwner {
        msg.sender.transfer(amount);
        OnWithdraw(msg.sender, amount);
    }

    // All contributions come through the fallback function
    function () payable public whenNotPaused {
        uint time = currentTime();

        // require the sale has started
        require(time >= SALE_START_DATE);

        // require that the sale has not ended
        require(time < SALE_END_DATE);

        // maximum contribution from this transaction is tracked in this variable
        uint maximumContribution = usdToWei(HARD_CAP_USD).sub(totalContributions);

        // store whether the contribution is made during the whitelist period
        bool isDuringWhitelistPeriod = time < WHITELIST_END_DATE;

        // these limits are only checked during the limited period
        if (time < LIMITS_END_DATE) {
            // require that they have not overpaid their gas price
            require(tx.gasprice <= MAX_GAS_PRICE);

            // require that they haven't sent too much gas
            require(msg.gas <= MAX_GAS);

            // if we are in the WHITELIST period, we need to make sure the sender contributed to the presale
            if (isDuringWhitelistPeriod) {
                require(isWhitelisted(msg.sender));

                // the maximum contribution is set for the whitelist period
                maximumContribution = Math.min256(
                    maximumContribution,
                    usdToWei(MAXIMUM_CONTRIBUTION_WHITELIST_PERIOD_USD).sub(contributionAmounts[msg.sender])
                );
            } else {
                // the maximum contribution is set for the limited period
                maximumContribution = Math.min256(
                    maximumContribution,
                    usdToWei(MAXIMUM_CONTRIBUTION_LIMITED_PERIOD_USD).sub(contributionAmounts[msg.sender])
                );
            }
        }

        // calculate how much contribution is accepted and how much is refunded
        uint contribution = Math.min256(msg.value, maximumContribution);
        uint refundWei = msg.value.sub(contribution);

        // require that they are allowed to contribute more
        require(contribution > 0);

        // account contribution towards total
        totalContributions = totalContributions.add(contribution);

        // account contribution towards address total
        contributionAmounts[msg.sender] = contributionAmounts[msg.sender].add(contribution);

        // and send them some bnty
        uint amountBntyRewarded = Math.min256(weiToBnty(contribution), bounty0xToken.balanceOf(this));
        require(bounty0xToken.transfer(msg.sender, amountBntyRewarded));

        if (refundWei > 0) {
            msg.sender.transfer(refundWei);
        }

        // log the contribution
        OnContribution(msg.sender, isDuringWhitelistPeriod, contribution, amountBntyRewarded, refundWei);
    }
}

// File: contracts/CrowdsaleTokenController.sol

contract CrowdsaleTokenController is Ownable, AddressWhitelist, TokenController {
    bool public whitelistOff;
    Bounty0xToken public token;

    function CrowdsaleTokenController(Bounty0xToken _token) public {
        token = _token;
    }

    // set the whitelistOff variable
    function setWhitelistOff(bool _whitelistOff) public onlyOwner {
        whitelistOff = _whitelistOff;
    }

    // the owner of the controller can change the controller to a new contract
    function changeController(address newController) public onlyOwner {
        token.changeController(newController);
    }

    // change whether transfers are enabled
    function enableTransfers(bool _transfersEnabled) public onlyOwner {
        token.enableTransfers(_transfersEnabled);
    }

    /// @notice Called when `_owner` sends ether to the MiniMe Token contract
    /// @param _owner The address that sent the ether to create tokens
    /// @return True if the ether is accepted, false if it throws
    function proxyPayment(address _owner) public payable returns (bool) {
        return false;
    }

    /// @notice Notifies the controller about a token transfer allowing the
    ///  controller to react if desired
    /// @param _from The origin of the transfer
    /// @param _to The destination of the transfer
    /// @param _amount The amount of the transfer
    /// @return False if the controller does not authorize the transfer
    function onTransfer(address _from, address _to, uint _amount) public returns (bool) {
        return whitelistOff || isWhitelisted(_from);
    }

    /// @notice Notifies the controller about an approval allowing the
    ///  controller to react if desired
    /// @param _owner The address that calls `approve()`
    /// @param _spender The spender in the `approve()` call
    /// @param _amount The amount in the `approve()` call
    /// @return False if the controller does not authorize the approval
    function onApprove(address _owner, address _spender, uint _amount) public returns (bool) {
        return whitelistOff || isWhitelisted(_owner);
    }
}