Contract Source Code (Solidity)

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Outline

•  contract Ownable
•    - function renounceOwnership()
•    - function transferOwnership(address _n ...
•    - function _transferOwnership(address _ ...
• library SafeMath
•    - function mul(uint256 _a, uint256 _b)
•    - function div(uint256 _a, uint256 _b)
•    - function sub(uint256 _a, uint256 _b)
•    - function add(uint256 _a, uint256 _b)
•  contract ReentrancyGuard
•  contract ERC20Basic
•    - function totalSupply()
•    - function balanceOf(address _who)
•    - function transfer(address _to, uint25 ...
•  contract ERC20 is ERC20Basic
•    - function allowance(address _owner, ad ...
•    - function transferFrom(address _from, ...
•    - function approve(address _spender, ui ...
•  contract DetailedERC20 is ERC20
•  contract TokenController
•    - function proxyPayment(address _owner)
•    - function onTransfer(address _from, ad ...
•    - function onApprove(address _owner, ad ...
•  contract ApproveAndCallFallBack
•    - function receiveApproval(address from ...
•  contract MiniMeToken is Ownable
•    - function transfer(address _to, uint25 ...
•    - function transferFrom(address _from, ...
•    - function doTransfer(address _from, ad ...
•    - function balanceOf(address _owner)
•    - function approve(address _spender, ui ...
•    - function allowance(address _owner, ad ...
•    - function approveAndCall(address _spen ...
•    - function totalSupply()
•    - function balanceOfAt(address _owner, ...
•    - function totalSupplyAt(uint _blockNum ...
•    - function createCloneToken(
•    - function generateTokens(address _owne ...
•    - function destroyTokens(address _owner ...
•    - function enableTransfers(bool _transf ...
•    - function getValueAt(Checkpoint[] stor ...
•    - function updateValueAtNow(Checkpoint[ ...
•    - function isContract(address _addr)
•    - function min(uint a, uint b)
•    - function ()
•    - function claimTokens(address _token)
•  contract MiniMeTokenFactory
•    - function createCloneToken(
• interface KyberNetworkProxyInterface
•    - function maxGasPrice()
•    - function getUserCapInWei(address user ...
•    - function getUserCapInTokenWei(address ...
•    - function enabled()
•    - function info(bytes32 id)
•    - function getExpectedRate(DetailedERC2 ...
•    - function tradeWithHint(DetailedERC20 ...
•  contract IAO is Ownable, Reentranc ... *
•    - function setActive(bool _isActive)
•    - function transferKROContractOwnership ...
•    - function _register(uint256 _donationI ...
•    - function proxyPayment(address _owner)
•    - function onTransfer(address _from, ad ...
•    - function onApprove(address _owner, ad ...
•    - function registerWithDAI(uint256 _don ...
•    - function registerWithETH(address _ref ...
•    - function registerWithToken(address _t ...
•    - function ()

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/**
 *Submitted for verification at Etherscan.io on 2018-10-20
*/

pragma solidity ^0.4.24;

/**
 * @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 OwnershipRenounced(address indexed previousOwner);
  event OwnershipTransferred(
    address indexed previousOwner,
    address indexed newOwner
  );


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


/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
    // Gas optimization: this is cheaper than asserting 'a' not being zero, but the
    // benefit is lost if 'b' is also tested.
    // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
    if (_a == 0) {
      return 0;
    }

    c = _a * _b;
    assert(c / _a == _b);
    return c;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  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 _a / _b;
  }

  /**
  * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
    assert(_b <= _a);
    return _a - _b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
    c = _a + _b;
    assert(c >= _a);
    return c;
  }
}

/**
 * @title Helps contracts guard against reentrancy attacks.
 * @author Remco Bloemen <remco@2π.com>, Eenae <[email protected]>
 * @dev If you mark a function `nonReentrant`, you should also
 * mark it `external`.
 */
contract ReentrancyGuard {

  /// @dev Constant for unlocked guard state - non-zero to prevent extra gas costs.
  /// See: https://github.com/OpenZeppelin/openzeppelin-solidity/issues/1056
  uint private constant REENTRANCY_GUARD_FREE = 1;

  /// @dev Constant for locked guard state
  uint private constant REENTRANCY_GUARD_LOCKED = 2;

  /**
   * @dev We use a single lock for the whole contract.
   */
  uint private reentrancyLock = REENTRANCY_GUARD_FREE;

  /**
   * @dev Prevents a contract from calling itself, directly or indirectly.
   * If you mark a function `nonReentrant`, you should also
   * mark it `external`. Calling one `nonReentrant` function from
   * another is not supported. Instead, you can implement a
   * `private` function doing the actual work, and an `external`
   * wrapper marked as `nonReentrant`.
   */
  modifier nonReentrant() {
    require(reentrancyLock == REENTRANCY_GUARD_FREE);
    reentrancyLock = REENTRANCY_GUARD_LOCKED;
    _;
    reentrancyLock = REENTRANCY_GUARD_FREE;
  }

}


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * See https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  function totalSupply() public view returns (uint256);
  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);
}


/**
 * @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
  );
}


/**
 * @title DetailedERC20 token
 * @dev The decimals are only for visualization purposes.
 * All the operations are done using the smallest and indivisible token unit,
 * just as on Ethereum all the operations are done in wei.
 */
contract DetailedERC20 is ERC20 {
  string public name;
  string public symbol;
  uint8 public decimals;

  constructor(string _name, string _symbol, uint8 _decimals) public {
    name = _name;
    symbol = _symbol;
    decimals = _decimals;
  }
}


/// @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);
}

/*
    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 owner is the msg.sender
///  that deploys the contract, so usually this token will be deployed by a
///  token owner contract, which Giveth will call a "Campaign"
contract MiniMeToken is Ownable {

    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
    constructor(
        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);
        doTransfer(msg.sender, _to, _amount);
        return true;
    }

    /// @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 owner of this contract can move tokens around at will,
        //  this is important to recognize! Confirm that you trust the
        //  owner of this contract, which in most situations should be
        //  another open source smart contract or 0x0
        if (msg.sender != owner) {
            require(transfersEnabled);

            // The standard ERC 20 transferFrom functionality
            require(allowed[_from][msg.sender] >= _amount);
            allowed[_from][msg.sender] -= _amount;
        }
        doTransfer(_from, _to, _amount);
        return true;
    }

    /// @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 {

           if (_amount == 0) {
               emit Transfer(_from, _to, _amount);    // Follow the spec to louch the event when transfer 0
               return;
           }

           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 throws
           uint previousBalanceFrom = balanceOfAt(_from, block.number);

           require(previousBalanceFrom >= _amount);

           // Alerts the token owner of the transfer
           if (isContract(owner)) {
               require(TokenController(owner).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
           uint 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
           emit Transfer(_from, _to, _amount);

    }

    /// @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 owner of the approve function call
        if (isContract(owner)) {
            require(TokenController(owner).onApprove(msg.sender, _spender, _amount));
        }

        allowed[msg.sender][_spender] = _amount;
        emit 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.transferOwnership(msg.sender);

        // An event to make the token easy to find on the blockchain
        emit 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 onlyOwner 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);
        emit 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
    ) onlyOwner 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);
        emit 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 onlyOwner {
        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 owner has not been
    ///  set to 0, then the `proxyPayment` method is called which relays the
    ///  ether and creates tokens as described in the token owner contract
    function () public payable {
        require(isContract(owner));
        require(TokenController(owner).proxyPayment.value(msg.value)(msg.sender));
    }

//////////
// Safety Methods
//////////

    /// @notice This method can be used by the owner 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 onlyOwner {
        if (_token == 0x0) {
            owner.transfer(address(this).balance);
            return;
        }

        MiniMeToken token = MiniMeToken(_token);
        uint balance = token.balanceOf(this);
        token.transfer(owner, balance);
        emit ClaimedTokens(_token, owner, balance);
    }

////////////////
// Events
////////////////
    event ClaimedTokens(address indexed _token, address indexed _owner, 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 {
    event CreatedToken(string symbol, address addr);

    /// @notice Update the DApp by creating a new token with new functionalities
    ///  the msg.sender becomes the owner 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.transferOwnership(msg.sender);
        emit CreatedToken(_tokenSymbol, address(newToken));
        return newToken;
    }
}

/// @title Kyber Network interface
interface KyberNetworkProxyInterface {
    function maxGasPrice() public view returns(uint);
    function getUserCapInWei(address user) public view returns(uint);
    function getUserCapInTokenWei(address user, DetailedERC20 token) public view returns(uint);
    function enabled() public view returns(bool);
    function info(bytes32 id) public view returns(uint);

    function getExpectedRate(DetailedERC20 src, DetailedERC20 dest, uint srcQty) public view
        returns (uint expectedRate, uint slippageRate);

    function tradeWithHint(DetailedERC20 src, uint srcAmount, DetailedERC20 dest, address destAddress, uint maxDestAmount,
        uint minConversionRate, address walletId, bytes hint) public payable returns(uint);
}


contract IAO is Ownable, ReentrancyGuard, TokenController {
    using SafeMath for uint256;

    modifier onlyActive {
        require(isActive, "IAO is not active");
        _;
    }

    DetailedERC20 constant internal ETH_TOKEN_ADDRESS = DetailedERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee);

    uint256 constant PRECISION = 10 ** 18; // we use 18 decimals
    uint256 constant MAX_DONATION = 100 * (10 ** 18); // max donation is 100 DAI
    uint256 constant KRO_RATE = 5 * (10 ** 17); // 1 DAI == 0.5 KRO
    uint256 constant REFERRAL_BONUS = 10 * (10 ** 16); // 10% bonus for getting referred
    address constant DAI_ADDR = 0x89d24A6b4CcB1B6fAA2625fE562bDD9a23260359;
    address constant KYBER_ADDR = 0x818E6FECD516Ecc3849DAf6845e3EC868087B755;

    address public kroAddr;
    address public beneficiary;
    bytes32 public secretHash;
    bool public isActive;

    event Register(address indexed _manager, uint256 indexed _block, uint256 _donationInDAI);


    // admin & internal functions

    constructor (address _kroAddr, address _beneficiary, bytes32 _secretHash) public {
        kroAddr = _kroAddr;
        beneficiary = _beneficiary;
        secretHash = _secretHash;
    }
    

    function setActive(bool _isActive) onlyOwner public {
        isActive = _isActive;
    }


    function transferKROContractOwnership(address _newOwner, string _secret) public onlyOwner {
        require(!isActive, "IAO is not over"); // can only transfer ownership when IAO is over
        require(keccak256(abi.encodePacked(_secret)) == secretHash, "Secret incorrect"); // need to provide the correct secret

        // transfer ownership
        Ownable kro = Ownable(kroAddr);
        kro.transferOwnership(_newOwner);
    }


    function _register(uint256 _donationInDAI, address _referrer) internal onlyActive {
        require(_donationInDAI > 0 && _donationInDAI <= MAX_DONATION, "Donation out of range");
        require(_referrer != msg.sender, "Can't refer self");

        MiniMeToken kro = MiniMeToken(kroAddr);
        require(kro.balanceOf(msg.sender) == 0, "Already joined"); // each address can only join the IAO once

        // mint KRO for msg.sender
        uint256 kroAmount = _donationInDAI.mul(KRO_RATE).div(PRECISION);
        require(kro.generateTokens(msg.sender, kroAmount), "Failed minting");

        // mint KRO for referral program
        if (_referrer != address(0) && kro.balanceOf(_referrer) > 0) {
            uint256 bonusAmount = kroAmount.mul(REFERRAL_BONUS).div(PRECISION);
            require(kro.generateTokens(msg.sender, bonusAmount), "Failed minting sender bonus");
            require(kro.generateTokens(_referrer, bonusAmount), "Failed minting referrer bonus");
        }

        // transfer DAI to beneficiary
        DetailedERC20 dai = DetailedERC20(DAI_ADDR);
        require(dai.transfer(beneficiary, _donationInDAI), "Failed DAI transfer to beneficiary");
        
        // emit events
        emit Register(msg.sender, block.number, _donationInDAI);
    }


    // MiniMe TokenController functions, not used right now

    function proxyPayment(address _owner) public payable returns(bool) {
        return false;
    }


    function onTransfer(address _from, address _to, uint _amount) public returns(bool) {
        return false;
    }


    function onApprove(address _owner, address _spender, uint _amount) public
        returns(bool) {
        return false;
    }


    // registration functions

    function registerWithDAI(uint256 _donationInDAI, address _referrer) public nonReentrant {
        DetailedERC20 dai = DetailedERC20(DAI_ADDR);
        require(dai.transferFrom(msg.sender, this, _donationInDAI), "Failed DAI transfer to IAO");
        _register(_donationInDAI, _referrer);
    }


    function registerWithETH(address _referrer) public payable nonReentrant {
        DetailedERC20 dai = DetailedERC20(DAI_ADDR);
        KyberNetworkProxyInterface kyber = KyberNetworkProxyInterface(KYBER_ADDR);
        uint256 daiRate;
        bytes memory hint;

        // trade ETH for DAI
        (,daiRate) = kyber.getExpectedRate(ETH_TOKEN_ADDRESS, dai, msg.value);
        require(daiRate > 0, "Zero price");
        uint256 receivedDAI = kyber.tradeWithHint.value(msg.value)(ETH_TOKEN_ADDRESS, msg.value, dai, this, MAX_DONATION * 2, daiRate, beneficiary, hint);
        
        // if DAI value is greater than maximum allowed, return excess DAI to msg.sender
        if (receivedDAI > MAX_DONATION) {
            require(dai.transfer(msg.sender, receivedDAI.sub(MAX_DONATION)), "Excess DAI transfer failed");
            receivedDAI = MAX_DONATION;
        }

        // register new manager
        _register(receivedDAI, _referrer);
    }

    // _donationInTokens should use the token's precision
    function registerWithToken(address _token, uint256 _donationInTokens, address _referrer) public nonReentrant {
        require(_token != address(0) && _token != address(ETH_TOKEN_ADDRESS) && _token != DAI_ADDR, "Invalid token");
        DetailedERC20 token = DetailedERC20(_token);
        require(token.totalSupply() > 0, "Zero token supply");

        DetailedERC20 dai = DetailedERC20(DAI_ADDR);
        KyberNetworkProxyInterface kyber = KyberNetworkProxyInterface(KYBER_ADDR);
        uint256 daiRate;
        bytes memory hint;

        // transfer tokens to this contract
        require(token.transferFrom(msg.sender, this, _donationInTokens), "Failed token transfer to IAO");

        // trade tokens for DAI
        (,daiRate) = kyber.getExpectedRate(token, dai, _donationInTokens);
        require(daiRate > 0, "Zero price");
        require(token.approve(KYBER_ADDR, 0), "Token allowance prezeroing failed");
        require(token.approve(KYBER_ADDR, _donationInTokens), "Token approval failed");
        uint256 receivedDAI = kyber.tradeWithHint(token, _donationInTokens, dai, this, MAX_DONATION * 2, daiRate, beneficiary, hint);
        require(token.approve(KYBER_ADDR, 0), "Token allowance postzeroing failed");

        // if DAI value is greater than maximum allowed, return excess DAI to msg.sender
        if (receivedDAI > MAX_DONATION) {
            require(dai.transfer(msg.sender, receivedDAI.sub(MAX_DONATION)), "Excess DAI transfer failed");
            receivedDAI = MAX_DONATION;
        }

        // register new manager
        _register(receivedDAI, _referrer);
    }


    function () public payable nonReentrant {
        registerWithETH(address(0));
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

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