pragma solidity ^0.4.24;

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;
  }
}

contract Config {
    uint256 public constant jvySupply = 333333333333333;
    uint256 public constant bonusSupply = 83333333333333;
    uint256 public constant saleSupply =  250000000000000;
    uint256 public constant hardCapUSD = 8000000;

    uint256 public constant preIcoBonus = 25;
    uint256 public constant minimalContributionAmount = 0.4 ether;

    function getStartPreIco() public view returns (uint256) {
        // solium-disable-next-line security/no-block-members
        uint256 nowTime = block.timestamp;
        uint256 _preIcoStartTime = nowTime + 1 minutes;
        return _preIcoStartTime;
    }

    function getStartIco() public view returns (uint256) {
        uint256 _icoStartTime = 1543554000;
        return _icoStartTime;
    }

    function getEndIco() public view returns (uint256) {
        uint256 _icoEndTime = 1551416400;
        return _icoEndTime;
    }
}

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;
  }
}

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);
}


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
  );
}


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;
  }
}

contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) internal balances;

  uint256 internal totalSupply_;

  /**
  * @dev Total number of tokens in existence
  */
  function totalSupply() public view returns (uint256) {
    return totalSupply_;
  }

  /**
  * @dev Transfer token for a specified address
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_value <= balances[msg.sender]);
    require(_to != address(0));

    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    emit Transfer(msg.sender, _to, _value);
    return true;
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of.
  * @return An uint256 representing the amount owned by the passed address.
  */
  function balanceOf(address _owner) public view returns (uint256) {
    return balances[_owner];
  }

}


contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) internal allowed;


  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amount of tokens to be transferred
   */
  function transferFrom(
    address _from,
    address _to,
    uint256 _value
  )
    public
    returns (bool)
  {
    require(_value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);
    require(_to != address(0));

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
    emit Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   * Beware that changing an allowance with this method brings the risk that someone may use both the old
   * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
   * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    emit Approval(msg.sender, _spender, _value);
    return true;
  }

  /**
   * @dev Function to check the amount of tokens that an owner allowed to a spender.
   * @param _owner address The address which owns the funds.
   * @param _spender address The address which will spend the funds.
   * @return A uint256 specifying the amount of tokens still available for the spender.
   */
  function allowance(
    address _owner,
    address _spender
   )
    public
    view
    returns (uint256)
  {
    return allowed[_owner][_spender];
  }

  /**
   * @dev Increase the amount of tokens that an owner allowed to a spender.
   * approve should be called when allowed[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _addedValue The amount of tokens to increase the allowance by.
   */
  function increaseApproval(
    address _spender,
    uint256 _addedValue
  )
    public
    returns (bool)
  {
    allowed[msg.sender][_spender] = (
      allowed[msg.sender][_spender].add(_addedValue));
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  /**
   * @dev Decrease the amount of tokens that an owner allowed to a spender.
   * approve should be called when allowed[_spender] == 0. To decrement
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _subtractedValue The amount of tokens to decrease the allowance by.
   */
  function decreaseApproval(
    address _spender,
    uint256 _subtractedValue
  )
    public
    returns (bool)
  {
    uint256 oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue >= oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}

contract Escrow is Ownable {
  using SafeMath for uint256;

  event Deposited(address indexed payee, uint256 weiAmount);
  event Withdrawn(address indexed payee, uint256 weiAmount);

  mapping(address => uint256) private deposits;

  function depositsOf(address _payee) public view returns (uint256) {
    return deposits[_payee];
  }

  /**
  * @dev Stores the sent amount as credit to be withdrawn.
  * @param _payee The destination address of the funds.
  */
  function deposit(address _payee) public onlyOwner payable {
    uint256 amount = msg.value;
    deposits[_payee] = deposits[_payee].add(amount);

    emit Deposited(_payee, amount);
  }

  /**
  * @dev Withdraw accumulated balance for a payee.
  * @param _payee The address whose funds will be withdrawn and transferred to.
  */
  function withdraw(address _payee) public onlyOwner {
    uint256 payment = deposits[_payee];
    assert(address(this).balance >= payment);

    deposits[_payee] = 0;

    _payee.transfer(payment);

    emit Withdrawn(_payee, payment);
  }
}


contract Crowdsale {
  using SafeMath for uint256;
  using SafeERC20 for ERC20;

  // The token being sold
  ERC20 public token;

  // Address where funds are collected
  address public wallet;

  // How many token units a buyer gets per wei.
  // The rate is the conversion between wei and the smallest and indivisible token unit.
  // So, if you are using a rate of 1 with a DetailedERC20 token with 3 decimals called TOK
  // 1 wei will give you 1 unit, or 0.001 TOK.
  uint256 public rate;

  // Amount of wei raised
  uint256 public weiRaised;

  /**
   * Event for token purchase logging
   * @param purchaser who paid for the tokens
   * @param beneficiary who got the tokens
   * @param value weis paid for purchase
   * @param amount amount of tokens purchased
   */
  event TokenPurchase(
    address indexed purchaser,
    address indexed beneficiary,
    uint256 value,
    uint256 amount
  );

  /**
   * @param _rate Number of token units a buyer gets per wei
   * @param _wallet Address where collected funds will be forwarded to
   * @param _token Address of the token being sold
   */
  constructor(uint256 _rate, address _wallet, ERC20 _token) public {
    require(_rate > 0);
    require(_wallet != address(0));
    require(_token != address(0));

    rate = _rate;
    wallet = _wallet;
    token = _token;
  }

  // -----------------------------------------
  // Crowdsale external interface
  // -----------------------------------------

  /**
   * @dev fallback function ***DO NOT OVERRIDE***
   */
  function () external payable {
    buyTokens(msg.sender);
  }

  /**
   * @dev low level token purchase ***DO NOT OVERRIDE***
   * @param _beneficiary Address performing the token purchase
   */
  function buyTokens(address _beneficiary) public payable {

    uint256 weiAmount = msg.value;
    _preValidatePurchase(_beneficiary, weiAmount);

    // calculate token amount to be created
    uint256 tokens = _getTokenAmount(weiAmount);

    // update state
    weiRaised = weiRaised.add(weiAmount);

    _processPurchase(_beneficiary, tokens);
    emit TokenPurchase(
      msg.sender,
      _beneficiary,
      weiAmount,
      tokens
    );

    _updatePurchasingState(_beneficiary, weiAmount);

    _forwardFunds();
    _postValidatePurchase(_beneficiary, weiAmount);
  }

  // -----------------------------------------
  // Internal interface (extensible)
  // -----------------------------------------

  /**
   * @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met. Use `super` in contracts that inherit from Crowdsale to extend their validations.
   * Example from CappedCrowdsale.sol's _preValidatePurchase method: 
   *   super._preValidatePurchase(_beneficiary, _weiAmount);
   *   require(weiRaised.add(_weiAmount) <= cap);
   * @param _beneficiary Address performing the token purchase
   * @param _weiAmount Value in wei involved in the purchase
   */
  function _preValidatePurchase(
    address _beneficiary,
    uint256 _weiAmount
  )
    internal
  {
    require(_beneficiary != address(0));
    require(_weiAmount != 0);
  }

  /**
   * @dev Validation of an executed purchase. Observe state and use revert statements to undo rollback when valid conditions are not met.
   * @param _beneficiary Address performing the token purchase
   * @param _weiAmount Value in wei involved in the purchase
   */
  function _postValidatePurchase(
    address _beneficiary,
    uint256 _weiAmount
  )
    internal
  {
    // optional override
  }

  /**
   * @dev Source of tokens. Override this method to modify the way in which the crowdsale ultimately gets and sends its tokens.
   * @param _beneficiary Address performing the token purchase
   * @param _tokenAmount Number of tokens to be emitted
   */
  function _deliverTokens(
    address _beneficiary,
    uint256 _tokenAmount
  )
    internal
  {
    token.safeTransfer(_beneficiary, _tokenAmount);
  }

  /**
   * @dev Executed when a purchase has been validated and is ready to be executed. Not necessarily emits/sends tokens.
   * @param _beneficiary Address receiving the tokens
   * @param _tokenAmount Number of tokens to be purchased
   */
  function _processPurchase(
    address _beneficiary,
    uint256 _tokenAmount
  )
    internal
  {
    _deliverTokens(_beneficiary, _tokenAmount);
  }

  /**
   * @dev Override for extensions that require an internal state to check for validity (current user contributions, etc.)
   * @param _beneficiary Address receiving the tokens
   * @param _weiAmount Value in wei involved in the purchase
   */
  function _updatePurchasingState(
    address _beneficiary,
    uint256 _weiAmount
  )
    internal
  {
    // optional override
  }

  /**
   * @dev Override to extend the way in which ether is converted to tokens.
   * @param _weiAmount Value in wei to be converted into tokens
   * @return Number of tokens that can be purchased with the specified _weiAmount
   */
  function _getTokenAmount(uint256 _weiAmount)
    internal view returns (uint256)
  {
    return _weiAmount.mul(rate);
  }

  /**
   * @dev Determines how ETH is stored/forwarded on purchases.
   */
  function _forwardFunds() internal {
    wallet.transfer(msg.value);
  }
}

contract ConditionalEscrow is Escrow {
  /**
  * @dev Returns whether an address is allowed to withdraw their funds. To be
  * implemented by derived contracts.
  * @param _payee The destination address of the funds.
  */
  function withdrawalAllowed(address _payee) public view returns (bool);

  function withdraw(address _payee) public {
    require(withdrawalAllowed(_payee));
    super.withdraw(_payee);
  }
}


contract RefundEscrow is Ownable, ConditionalEscrow {
  enum State { Active, Refunding, Closed }

  event Closed();
  event RefundsEnabled();

  State public state;
  address public beneficiary;

  /**
   * @dev Constructor.
   * @param _beneficiary The beneficiary of the deposits.
   */
  constructor(address _beneficiary) public {
    require(_beneficiary != address(0));
    beneficiary = _beneficiary;
    state = State.Active;
  }

  /**
   * @dev Stores funds that may later be refunded.
   * @param _refundee The address funds will be sent to if a refund occurs.
   */
  function deposit(address _refundee) public payable {
    require(state == State.Active);
    super.deposit(_refundee);
  }

  /**
   * @dev Allows for the beneficiary to withdraw their funds, rejecting
   * further deposits.
   */
  function close() public onlyOwner {
    require(state == State.Active);
    state = State.Closed;
    emit Closed();
  }

  /**
   * @dev Allows for refunds to take place, rejecting further deposits.
   */
  function enableRefunds() public onlyOwner {
    require(state == State.Active);
    state = State.Refunding;
    emit RefundsEnabled();
  }

  /**
   * @dev Withdraws the beneficiary's funds.
   */
  function beneficiaryWithdraw() public {
    require(state == State.Closed);
    beneficiary.transfer(address(this).balance);
  }

  /**
   * @dev Returns whether refundees can withdraw their deposits (be refunded).
   */
  function withdrawalAllowed(address _payee) public view returns (bool) {
    return state == State.Refunding;
  }
}

library SafeERC20 {
  function safeTransfer(
    ERC20Basic _token,
    address _to,
    uint256 _value
  )
    internal
  {
    require(_token.transfer(_to, _value));
  }

  function safeTransferFrom(
    ERC20 _token,
    address _from,
    address _to,
    uint256 _value
  )
    internal
  {
    require(_token.transferFrom(_from, _to, _value));
  }

  function safeApprove(
    ERC20 _token,
    address _spender,
    uint256 _value
  )
    internal
  {
    require(_token.approve(_spender, _value));
  }
}

contract CappedCrowdsale is Crowdsale {
  using SafeMath for uint256;

  uint256 public cap;

  /**
   * @dev Constructor, takes maximum amount of wei accepted in the crowdsale.
   * @param _cap Max amount of wei to be contributed
   */
  constructor(uint256 _cap) public {
    require(_cap > 0);
    cap = _cap;
  }

  /**
   * @dev Checks whether the cap has been reached.
   * @return Whether the cap was reached
   */
  function capReached() public view returns (bool) {
    return weiRaised >= cap;
  }

  /**
   * @dev Extend parent behavior requiring purchase to respect the funding cap.
   * @param _beneficiary Token purchaser
   * @param _weiAmount Amount of wei contributed
   */
  function _preValidatePurchase(
    address _beneficiary,
    uint256 _weiAmount
  )
    internal
  {
    super._preValidatePurchase(_beneficiary, _weiAmount);
    require(weiRaised.add(_weiAmount) <= cap);
  }

}



contract TimedCrowdsale is Crowdsale {
  using SafeMath for uint256;

  uint256 public openingTime;
  uint256 public closingTime;

  /**
   * @dev Reverts if not in crowdsale time range.
   */
  modifier onlyWhileOpen {
    // solium-disable-next-line security/no-block-members
    require(block.timestamp >= openingTime && block.timestamp <= closingTime);
    _;
  }

  /**
   * @dev Constructor, takes crowdsale opening and closing times.
   * @param _openingTime Crowdsale opening time
   * @param _closingTime Crowdsale closing time
   */
  constructor(uint256 _openingTime, uint256 _closingTime) public {
    // solium-disable-next-line security/no-block-members
    require(_openingTime >= block.timestamp);
    require(_closingTime >= _openingTime);

    openingTime = _openingTime;
    closingTime = _closingTime;
  }

  /**
   * @dev Checks whether the period in which the crowdsale is open has already elapsed.
   * @return Whether crowdsale period has elapsed
   */
  function hasClosed() public view returns (bool) {
    // solium-disable-next-line security/no-block-members
    return block.timestamp > closingTime;
  }

  /**
   * @dev Extend parent behavior requiring to be within contributing period
   * @param _beneficiary Token purchaser
   * @param _weiAmount Amount of wei contributed
   */
  function _preValidatePurchase(
    address _beneficiary,
    uint256 _weiAmount
  )
    internal
    onlyWhileOpen
  {
    super._preValidatePurchase(_beneficiary, _weiAmount);
  }

}

contract FinalizableCrowdsale is Ownable, TimedCrowdsale {
  using SafeMath for uint256;

  bool public isFinalized = false;

  event Finalized();

  /**
   * @dev Must be called after crowdsale ends, to do some extra finalization
   * work. Calls the contract's finalization function.
   */
  function finalize() public onlyOwner {
    require(!isFinalized);
    require(hasClosed());

    finalization();
    emit Finalized();

    isFinalized = true;
  }

  /**
   * @dev Can be overridden to add finalization logic. The overriding function
   * should call super.finalization() to ensure the chain of finalization is
   * executed entirely.
   */
  function finalization() internal {
  }

}

contract RefundableCrowdsale is FinalizableCrowdsale {
  using SafeMath for uint256;

  // minimum amount of funds to be raised in weis
  uint256 public goal;

  // refund escrow used to hold funds while crowdsale is running
  RefundEscrow private escrow;

  /**
   * @dev Constructor, creates RefundEscrow.
   * @param _goal Funding goal
   */
  constructor(uint256 _goal) public {
    require(_goal > 0);
    escrow = new RefundEscrow(wallet);
    goal = _goal;
  }

  /**
   * @dev Investors can claim refunds here if crowdsale is unsuccessful
   */
  function claimRefund() public {
    require(isFinalized);
    require(!goalReached());

    escrow.withdraw(msg.sender);
  }

  /**
   * @dev Checks whether funding goal was reached.
   * @return Whether funding goal was reached
   */
  function goalReached() public view returns (bool) {
    return weiRaised >= goal;
  }

  /**
   * @dev escrow finalization task, called when owner calls finalize()
   */
  function finalization() internal {
    if (goalReached()) {
      escrow.close();
      escrow.beneficiaryWithdraw();
    } else {
      escrow.enableRefunds();
    }

    super.finalization();
  }

  /**
   * @dev Overrides Crowdsale fund forwarding, sending funds to escrow.
   */
  function _forwardFunds() internal {
    escrow.deposit.value(msg.value)(msg.sender);
  }

}

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() public onlyOwner whenNotPaused {
    paused = true;
    emit Pause();
  }

  /**
   * @dev called by the owner to unpause, returns to normal state
   */
  function unpause() public onlyOwner whenPaused {
    paused = false;
    emit Unpause();
  }
}

contract MultiSigWallet {
    uint constant public MAX_OWNER_COUNT = 50;

    event Confirmation(address indexed sender, uint indexed transactionId);
    event Revocation(address indexed sender, uint indexed transactionId);
    event Submission(uint indexed transactionId);
    event Execution(uint indexed transactionId);
    event ExecutionFailure(uint indexed transactionId);
    event Deposit(address indexed sender, uint value);
    event OwnerAddition(address indexed owner);
    event OwnerRemoval(address indexed owner);
    event RequirementChange(uint required);

    mapping (uint => Transaction) public transactions;
    mapping (uint => mapping (address => bool)) public confirmations;
    mapping (address => bool) public isOwner;

    address[] public owners;
    uint public required;
    uint public transactionCount;

    struct Transaction {
        address destination;
        uint value;
        bytes data;
        bool executed;
    }

    modifier onlyWallet() {
        require(msg.sender == address(this));
        _;
    }

    modifier ownerDoesNotExist(address owner) {
        require(!isOwner[owner]);
        _;
    }

    modifier ownerExists(address owner) {
        require(isOwner[owner]);
        _;
    }

    modifier transactionExists(uint transactionId) {
        require(transactions[transactionId].destination != 0);
        _;
    }

    modifier confirmed(uint transactionId, address owner) {
        require(confirmations[transactionId][owner]);
        _;
    }

    modifier notConfirmed(uint transactionId, address owner) {
        require(!confirmations[transactionId][owner]);
        _;
    }

    modifier notExecuted(uint transactionId) {
        require(!transactions[transactionId].executed);
        _;
    }

    modifier notNull(address _address) {
        require(_address != address(0));
        _;
    }

    modifier validRequirement(uint ownerCount, uint _required) {
        bool ownerValid = ownerCount <= MAX_OWNER_COUNT;
        bool ownerNotZero = ownerCount != 0;
        bool requiredValid = _required <= ownerCount;
        bool requiredNotZero = _required != 0;
        require(ownerValid && ownerNotZero && requiredValid && requiredNotZero);
        _;
    }

    /// @dev Fallback function allows to deposit ether.
    function() payable public {
        fallback();
    }

    function fallback() payable public {
        if (msg.value > 0) {
            emit Deposit(msg.sender, msg.value);
        }
    }

    /*
     * Public functions
     */
    /// @dev Contract constructor sets initial owners and required number of confirmations.
    /// @param _owners List of initial owners.
    /// @param _required Number of required confirmations.
    constructor(
        address[] _owners, 
        uint _required
    ) public validRequirement(_owners.length, _required) 
    {
        for (uint i = 0; i<_owners.length; i++) {
            require(!isOwner[_owners[i]] && _owners[i] != 0);
            isOwner[_owners[i]] = true;
        }
        owners = _owners;
        required = _required;
    }

    /// @dev Allows to add a new owner. Transaction has to be sent by wallet.
    /// @param owner Address of new owner.
    function addOwner(address owner)
        public
        onlyWallet
        ownerDoesNotExist(owner)
        notNull(owner)
        validRequirement(owners.length + 1, required)
    {
        isOwner[owner] = true;
        owners.push(owner);
        emit OwnerAddition(owner);
    }

    /// @dev Allows to remove an owner. Transaction has to be sent by wallet.
    /// @param owner Address of owner.
    function removeOwner(address owner)
        public
        onlyWallet
        ownerExists(owner)
    {
        isOwner[owner] = false;
        for (uint i = 0; i < owners.length - 1; i++)
            if (owners[i] == owner) {
                owners[i] = owners[owners.length - 1];
                break;
            }
        owners.length -= 1;
        if (required > owners.length)
            changeRequirement(owners.length);
        emit OwnerRemoval(owner);
    }

    /// @dev Allows to replace an owner with a new owner. Transaction has to be sent by wallet.
    /// @param owner Address of owner to be replaced.
    /// @param newOwner Address of new owner.
    function replaceOwner(address owner, address newOwner)
        public
        onlyWallet
        ownerExists(owner)
        ownerDoesNotExist(newOwner)
    {
        for (uint i = 0; i < owners.length; i++)
            if (owners[i] == owner) {
                owners[i] = newOwner;
                break;
            }
        isOwner[owner] = false;
        isOwner[newOwner] = true;
        emit OwnerRemoval(owner);
        emit OwnerAddition(newOwner);
    }

    /// @dev Allows to change the number of required confirmations. Transaction has to be sent by wallet.
    /// @param _required Number of required confirmations.
    function changeRequirement(uint _required)
        public
        onlyWallet
        validRequirement(owners.length, _required)
    {
        required = _required;
        emit RequirementChange(_required);
    }

    /// @dev Allows an owner to submit and confirm a transaction.
    /// @param destination Transaction target address.
    /// @param value Transaction ether value.
    /// @param data Transaction data payload.
    /// @return Returns transaction ID.
    function submitTransaction(address destination, uint value, bytes data)
        public
        returns (uint transactionId)
    {
        transactionId = addTransaction(destination, value, data);
        confirmTransaction(transactionId);
    }

    /// @dev Allows an owner to confirm a transaction.
    /// @param transactionId Transaction ID.
    function confirmTransaction(uint transactionId)
        public
        ownerExists(msg.sender)
        transactionExists(transactionId)
        notConfirmed(transactionId, msg.sender)
    {
        confirmations[transactionId][msg.sender] = true;
        emit Confirmation(msg.sender, transactionId);
        executeTransaction(transactionId);
    }

    /// @dev Allows an owner to revoke a confirmation for a transaction.
    /// @param transactionId Transaction ID.
    function revokeConfirmation(uint transactionId)
        public
        ownerExists(msg.sender)
        confirmed(transactionId, msg.sender)
        notExecuted(transactionId)
    {
        confirmations[transactionId][msg.sender] = false;
        emit Revocation(msg.sender, transactionId);
    }

    /// @dev Allows anyone to execute a confirmed transaction.
    /// @param transactionId Transaction ID.
    function executeTransaction(uint transactionId)
        public
        ownerExists(msg.sender)
        confirmed(transactionId, msg.sender)
        notExecuted(transactionId)
    {
        if (isConfirmed(transactionId)) {
            Transaction storage txn = transactions[transactionId];
            txn.executed = true;
            if (txn.destination.call.value(txn.value)(txn.data))
                emit Execution(transactionId);
            else {
                emit ExecutionFailure(transactionId);
                txn.executed = false;
            }
        }
    }

    /// @dev Returns the confirmation status of a transaction.
    /// @param transactionId Transaction ID.
    /// @return Confirmation status.
    function isConfirmed(uint transactionId) public view returns (bool) {
        uint count = 0;
        for (uint i = 0; i < owners.length; i++) {
            if (confirmations[transactionId][owners[i]])
                count += 1;
            if (count == required)
                return true;
        }
    }

    /*
     * Internal functions
     */
    /// @dev Adds a new transaction to the transaction mapping, if transaction does not exist yet.
    /// @param destination Transaction target address.
    /// @param value Transaction ether value.
    /// @param data Transaction data payload.
    /// @return Returns transaction ID.
    function addTransaction(address destination, uint value, bytes data)
        internal
        notNull(destination)
        returns (uint transactionId)
    {
        transactionId = transactionCount;
        transactions[transactionId] = Transaction({
            destination: destination,
            value: value,
            data: data,
            executed: false
        });
        transactionCount += 1;
        emit Submission(transactionId);
    }

    /*
     * Web3 call functions
     */
    /// @dev Returns number of confirmations of a transaction.
    /// @param transactionId Transaction ID.
    /// @return Number of confirmations.
    function getConfirmationCount(uint transactionId) public view returns (uint count) {
        for (uint i = 0; i < owners.length; i++) {
            if (confirmations[transactionId][owners[i]]) {
                count += 1;
            }
        }
    }

    /// @dev Returns total number of transactions after filers are applied.
    /// @param pending Include pending transactions.
    /// @param executed Include executed transactions.
    /// @return Total number of transactions after filters are applied.
    function getTransactionCount(
        bool pending, 
        bool executed
    ) public view returns (uint count) {
        for (uint i = 0; i < transactionCount; i++) {
            if (pending && 
                !transactions[i].executed || 
                executed && 
                transactions[i].executed
            ) {
                count += 1;
            }
        }
    }

    /// @dev Returns list of owners.
    /// @return List of owner addresses.
    function getOwners() public view returns (address[]) {
        return owners;
    }

    /// @dev Returns array with owner addresses, which confirmed transaction.
    /// @param transactionId Transaction ID.
    /// @return Returns array of owner addresses.
    function getConfirmations(
        uint transactionId
    ) public view returns (address[] _confirmations) {
        address[] memory confirmationsTemp = new address[](owners.length);
        uint count = 0;
        uint i;
        for (i = 0; i < owners.length; i++)
            if (confirmations[transactionId][owners[i]]) {
                confirmationsTemp[count] = owners[i];
                count += 1;
            }
        _confirmations = new address[](count);
        for (i = 0; i < count; i++)
            _confirmations[i] = confirmationsTemp[i];
    }

    /// @dev Returns list of transaction IDs in defined range.
    /// @param from Index start position of transaction array.
    /// @param to Index end position of transaction array.
    /// @param pending Include pending transactions.
    /// @param executed Include executed transactions.
    /// @return Returns array of transaction IDs.
    function getTransactionIds(
        uint from, 
        uint to, 
        bool pending, 
        bool executed
    ) public view returns (uint[] _transactionIds) {
        uint[] memory transactionIdsTemp = new uint[](transactionCount);
        uint count = 0;
        uint i;
        for (i = 0; i < transactionCount; i++)
            if (pending && 
                !transactions[i].executed || 
                executed && 
                transactions[i].executed
            ) {
                transactionIdsTemp[count] = i;
                count += 1;
            }
        _transactionIds = new uint[](to - from);
        for (i = from; i < to; i++)
            _transactionIds[i - from] = transactionIdsTemp[i];
    }
}

contract JavvyMultiSig is MultiSigWallet {
    constructor(
        address[] _owners, 
        uint _required
    )
    MultiSigWallet(_owners, _required)
    public {}
}

contract JavvyToken is DetailedERC20, StandardToken, Ownable, Config {
    address public crowdsaleAddress;
    address public bonusAddress;
    address public multiSigAddress;

    constructor(
        string _name, 
        string _symbol, 
        uint8 _decimals
    ) public
    DetailedERC20(_name, _symbol, _decimals) {
        require(
            jvySupply == saleSupply + bonusSupply,
            "Sum of provided supplies is not equal to declared total Javvy supply. Check config!"
        );
        totalSupply_ = tokenToDecimals(jvySupply);
    }

    function initializeBalances(
        address _crowdsaleAddress,
        address _bonusAddress,
        address _multiSigAddress
    ) public 
    onlyOwner() {
        crowdsaleAddress = _crowdsaleAddress;
        bonusAddress = _bonusAddress;
        multiSigAddress = _multiSigAddress;

        _initializeBalance(_crowdsaleAddress, saleSupply);
        _initializeBalance(_bonusAddress, bonusSupply);
    }

    function _initializeBalance(address _address, uint256 _supply) private {
        require(_address != address(0), "Address cannot be equal to 0x0!");
        require(_supply != 0, "Supply cannot be equal to 0!");
        balances[_address] = tokenToDecimals(_supply);
        emit Transfer(address(0), _address, _supply);
    }

    function tokenToDecimals(uint256 _amount) private view returns (uint256){
        // NOTE for additional accuracy, we're using 6 decimal places in supply
        return _amount * (10 ** 12);
    }

    function getRemainingSaleTokens() external view returns (uint256) {
        return balanceOf(crowdsaleAddress);
    }

}


contract JavvyCrowdsale is RefundableCrowdsale, CappedCrowdsale, Pausable, Config {
    uint256 public icoStartTime;
    address public transminingAddress;
    address public bonusAddress;
    uint256 private USDETHRate;

    mapping (address => bool) public blacklisted;

    JavvyToken token;
    
    enum Stage {
        NotStarted,
        PreICO,
        ICO,
        AfterICO
    }

    function getStage() public view returns (Stage) {
        // solium-disable-next-line security/no-block-members
        uint256 blockTime = block.timestamp;
        if (blockTime < openingTime) return Stage.NotStarted;
        if (blockTime < icoStartTime) return Stage.PreICO;
        if (blockTime < closingTime) return Stage.ICO;
        else return Stage.AfterICO;
    }

    constructor(
        uint256 _rate,  
        JavvyMultiSig _wallet,
        JavvyToken _token,
        uint256 _cap,  // Should be in USD!
        uint256 _goal,
        address _bonusAddress,
        address[] _blacklistAddresses,
        uint256 _USDETHRate
    ) 
    Crowdsale(_rate, _wallet, _token)
    CappedCrowdsale(_cap)
    TimedCrowdsale(getStartPreIco(), getEndIco())
    RefundableCrowdsale(_goal)
    public {
        require(getStartIco() > block.timestamp, "ICO has to begin in the future");
        require(getEndIco() > block.timestamp, "ICO has to end in the future");
        require(_goal <= _cap, "Soft cap should be equal or smaller than hard cap");
        icoStartTime = getStartIco();
        bonusAddress = _bonusAddress;
        token = _token;
        for (uint256 i = 0; i < _blacklistAddresses.length; i++) {
            blacklisted[_blacklistAddresses[i]] = true;
        }
        setUSDETHRate(_USDETHRate);
    }

    function buyTokens(address _beneficiary) public payable {
        bool preallocated = false;
        uint256 preallocatedTokens = 0;

        _buyTokens(
            _beneficiary, 
            msg.sender, 
            msg.value,
            preallocated,
            preallocatedTokens
        );
    }

    function bulkPreallocate(address[] _owners, uint256[] _tokens, uint256[] _paid)
    public
    onlyOwner() {
        require(
            _owners.length == _tokens.length,
            "Lengths of parameter lists have to be equal"
        );
        require(
            _owners.length == _paid.length,
            "Lengths of parameter lists have to be equal"
        );
        for (uint256 i=0; i< _owners.length; i++) {
            preallocate(_owners[i], _tokens[i], _paid[i]);
        }
    }

    function preallocate(address _owner, uint256 _tokens, uint256 _paid)
    public
    onlyOwner() {
        require(!blacklisted[_owner], "Address where tokens will be sent is blacklisted");
        bool preallocated = true;
        uint256 preallocatedTokens = _tokens;

        _buyTokens(
            _owner, 
            _owner, 
            _paid,
            preallocated,
            preallocatedTokens
        );
    }

    function setTransminingAddress(address _transminingAddress) public
    onlyOwner() {
        transminingAddress = _transminingAddress;
    }

    // Created for moving funds later to transmining address
    function moveTokensToTransmining(uint256 _amount) public
    onlyOwner() {
        uint256 remainingTokens = token.getRemainingSaleTokens();
        require(
            transminingAddress != address(0),
            "Transmining address must be set!"
        );
        require(
            remainingTokens >= _amount,
            "Balance of remaining tokens for sale is smaller than requested amount for trans-mining"
        );
        uint256 weiNeeded = cap - weiRaised;
        uint256 tokensNeeded = weiNeeded * rate;
        
        if (getStage() != Stage.AfterICO){
            require(remainingTokens - _amount > tokensNeeded, "You need to leave enough tokens to reach hard cap");
        }
        _deliverTokens(transminingAddress, _amount, this);
    }

    function _buyTokens(
        address _beneficiary, 
        address _sender, 
        uint256 _value,
        bool _preallocated,
        uint256 _tokens
    ) internal
    whenNotPaused() {
        require(!blacklisted[_beneficiary], "Beneficiary is blacklisted");
        uint256 tokens;
        
        if (!_preallocated) {
            // pre validate params
            require(
                _value >= minimalContributionAmount, 
                "Amount contributed should be greater than required minimal contribution"
            );
            require(_tokens == 0, "Not preallocated tokens should be zero");
            _preValidatePurchase(_beneficiary, _value);
        } else {
            require(_tokens != 0, "Preallocated tokens should be greater than zero");
            require(weiRaised.add(_value) <= cap, "Raised tokens should not exceed hard cap");
        }

        // calculate tokens
        if (!_preallocated) {
            tokens = _getTokenAmount(_value);
        } else {
            tokens = _tokens;
        }

        // increase wei
        weiRaised = weiRaised.add(_value);

        _processPurchase(_beneficiary, tokens, this);
        
        emit TokenPurchase(
            _sender,
            _beneficiary,
            _value,
            tokens
        );

        // transfer payment
        _updatePurchasingState(_beneficiary, _value);
        _forwardFunds();

        // post validate
        if (!_preallocated) {
            _postValidatePurchase(_beneficiary, _value);
        }
    }

    function _getBaseTokens(uint256 _value) internal view returns (uint256) {
        return _value.mul(rate);
    }

    function _getTokenAmount(uint256 _weiAmount)
    internal view returns (uint256) {
        uint256 baseTokens = _getBaseTokens(_weiAmount);
        if (getStage() == Stage.PreICO) {
            return baseTokens.mul(100 + preIcoBonus).div(100);
        } else {
            return baseTokens;
        }
    }

    function _processPurchase(
        address _beneficiary,
        uint256 _tokenAmount,
        address _sourceAddress
    ) internal {
        _deliverTokens(_beneficiary, _tokenAmount, _sourceAddress);
    }

    function _deliverTokens(
        address _beneficiary,
        uint256 _tokenAmount,
        address _sourceAddress
    ) internal {
        if (_sourceAddress == address(this)) {
            token.transfer(_beneficiary, _tokenAmount);
        } else {
            token.transferFrom(_sourceAddress, _beneficiary, _tokenAmount);
        }
    }

    function finalization() internal {
        require(
            transminingAddress != address(0),
            "Transmining address must be set!"
        );
        super.finalization();
        
        _deliverTokens(transminingAddress, token.getRemainingSaleTokens(), this);
    }

    function setUSDETHRate(uint256 _USDETHRate) public 
    onlyOwner(){
        require(_USDETHRate > 0, "USDETH rate should not be zero");
        USDETHRate = _USDETHRate;
        cap = hardCapUSD * USDETHRate;
    }
}