pragma solidity ^0.4.24;



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);
}



pragma solidity ^0.4.24;




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
  );
}



pragma solidity ^0.4.24;



library SafeMath {

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

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

  
  function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
    
    
    
    return _a / _b;
  }

  
  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 c) {
    c = _a + _b;
    assert(c >= _a);
    return c;
  }
}



pragma solidity ^0.4.24;





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));
  }
}



pragma solidity ^0.4.24;






contract Crowdsale {
  using SafeMath for uint256;
  using SafeERC20 for ERC20;

  
  ERC20 public token;

  
  address public wallet;

  
  
  
  
  uint256 public rate;

  
  uint256 public weiRaised;

  
  event TokenPurchase(
    address indexed purchaser,
    address indexed beneficiary,
    uint256 value,
    uint256 amount
  );

  
  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;
  }

  
  
  

  
  function () external payable {
    buyTokens(msg.sender);
  }

  
  function buyTokens(address _beneficiary) public payable {

    uint256 weiAmount = msg.value;
    _preValidatePurchase(_beneficiary, weiAmount);

    
    uint256 tokens = _getTokenAmount(weiAmount);

    
    weiRaised = weiRaised.add(weiAmount);

    _processPurchase(_beneficiary, tokens);
    emit TokenPurchase(
      msg.sender,
      _beneficiary,
      weiAmount,
      tokens
    );

    _updatePurchasingState(_beneficiary, weiAmount);

    _forwardFunds();
    _postValidatePurchase(_beneficiary, weiAmount);
  }

  
  
  

  
  function _preValidatePurchase(
    address _beneficiary,
    uint256 _weiAmount
  )
    internal
  {
    require(_beneficiary != address(0));
    require(_weiAmount != 0);
  }

  
  function _postValidatePurchase(
    address _beneficiary,
    uint256 _weiAmount
  )
    internal
  {
    
  }

  
  function _deliverTokens(
    address _beneficiary,
    uint256 _tokenAmount
  )
    internal
  {
    token.safeTransfer(_beneficiary, _tokenAmount);
  }

  
  function _processPurchase(
    address _beneficiary,
    uint256 _tokenAmount
  )
    internal
  {
    _deliverTokens(_beneficiary, _tokenAmount);
  }

  
  function _updatePurchasingState(
    address _beneficiary,
    uint256 _weiAmount
  )
    internal
  {
    
  }

  
  function _getTokenAmount(uint256 _weiAmount)
    internal view returns (uint256)
  {
    return _weiAmount.mul(rate);
  }

  
  function _forwardFunds() internal {
    wallet.transfer(msg.value);
  }
}



pragma solidity ^0.4.24;





contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) internal balances;

  uint256 internal totalSupply_;

  
  function totalSupply() public view returns (uint256) {
    return totalSupply_;
  }

  
  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;
  }

  
  function balanceOf(address _owner) public view returns (uint256) {
    return balances[_owner];
  }

}



pragma solidity ^0.4.24;





contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) internal allowed;


  
  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;
  }

  
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    emit Approval(msg.sender, _spender, _value);
    return true;
  }

  
  function allowance(
    address _owner,
    address _spender
   )
    public
    view
    returns (uint256)
  {
    return allowed[_owner][_spender];
  }

  
  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;
  }

  
  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;
  }

}



pragma solidity ^0.4.24;



contract Ownable {
  address public owner;


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


  
  constructor() public {
    owner = msg.sender;
  }

  
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }

  
  function renounceOwnership() public onlyOwner {
    emit OwnershipRenounced(owner);
    owner = address(0);
  }

  
  function transferOwnership(address _newOwner) public onlyOwner {
    _transferOwnership(_newOwner);
  }

  
  function _transferOwnership(address _newOwner) internal {
    require(_newOwner != address(0));
    emit OwnershipTransferred(owner, _newOwner);
    owner = _newOwner;
  }
}



pragma solidity ^0.4.24;





contract MintableToken is StandardToken, Ownable {
  event Mint(address indexed to, uint256 amount);
  event MintFinished();

  bool public mintingFinished = false;


  modifier canMint() {
    require(!mintingFinished);
    _;
  }

  modifier hasMintPermission() {
    require(msg.sender == owner);
    _;
  }

  
  function mint(
    address _to,
    uint256 _amount
  )
    public
    hasMintPermission
    canMint
    returns (bool)
  {
    totalSupply_ = totalSupply_.add(_amount);
    balances[_to] = balances[_to].add(_amount);
    emit Mint(_to, _amount);
    emit Transfer(address(0), _to, _amount);
    return true;
  }

  
  function finishMinting() public onlyOwner canMint returns (bool) {
    mintingFinished = true;
    emit MintFinished();
    return true;
  }
}



pragma solidity ^0.4.24;





contract MintedCrowdsale is Crowdsale {

  
  function _deliverTokens(
    address _beneficiary,
    uint256 _tokenAmount
  )
    internal
  {
    
    require(MintableToken(address(token)).mint(_beneficiary, _tokenAmount));
  }
}



pragma solidity ^0.4.24;





contract CappedCrowdsale is Crowdsale {
  using SafeMath for uint256;

  uint256 public cap;

  
  constructor(uint256 _cap) public {
    require(_cap > 0);
    cap = _cap;
  }

  
  function capReached() public view returns (bool) {
    return weiRaised >= cap;
  }

  
  function _preValidatePurchase(
    address _beneficiary,
    uint256 _weiAmount
  )
    internal
  {
    super._preValidatePurchase(_beneficiary, _weiAmount);
    require(weiRaised.add(_weiAmount) <= cap);
  }

}



pragma solidity ^0.4.24;





contract TimedCrowdsale is Crowdsale {
  using SafeMath for uint256;

  uint256 public openingTime;
  uint256 public closingTime;

  
  modifier onlyWhileOpen {
    
    require(block.timestamp >= openingTime && block.timestamp <= closingTime);
    _;
  }

  
  constructor(uint256 _openingTime, uint256 _closingTime) public {
    
    require(_openingTime >= block.timestamp);
    require(_closingTime >= _openingTime);

    openingTime = _openingTime;
    closingTime = _closingTime;
  }

  
  function hasClosed() public view returns (bool) {
    
    return block.timestamp > closingTime;
  }

  
  function _preValidatePurchase(
    address _beneficiary,
    uint256 _weiAmount
  )
    internal
    onlyWhileOpen
  {
    super._preValidatePurchase(_beneficiary, _weiAmount);
  }

}



pragma solidity ^0.4.24;






contract FinalizableCrowdsale is Ownable, TimedCrowdsale {
  using SafeMath for uint256;

  bool public isFinalized = false;

  event Finalized();

  
  function finalize() public onlyOwner {
    require(!isFinalized);
    require(hasClosed());

    finalization();
    emit Finalized();

    isFinalized = true;
  }

  
  function finalization() internal {
  }

}



pragma solidity ^0.4.24;




contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  
  modifier whenPaused() {
    require(paused);
    _;
  }

  
  function pause() public onlyOwner whenNotPaused {
    paused = true;
    emit Pause();
  }

  
  function unpause() public onlyOwner whenPaused {
    paused = false;
    emit Unpause();
  }
}



pragma solidity ^0.4.24;






contract ATFCrowdsale is MintedCrowdsale, CappedCrowdsale, Ownable {

    struct CustomContract {
        bool isReferral;
        bool isSpecial;
        address referralAddress;
    }

    
    
    enum CrowdsaleStage { PrivateICO, PreICO, ICO }
    CrowdsaleStage public stage = CrowdsaleStage.PrivateICO;
    

    
    
    uint256 public maxTokens = 300000000 * 10**18; 
    uint256 public tokensForEcosystem = 120000000 * 10**18;
    uint256 public tokensForTeam = 15000000 * 10**18; 
    uint256 public tokensForBounty = 15000000 * 10**18;
    uint256 public tokensForMarketing = 30000000 * 10**18; 
    uint256 public tokensForOperations = 30000000 * 10**18;
    uint256 public totalTokensForSale = 90000000 * 10**18; 
    

    
    
    uint256 public investorMinCap = 1000000000000000000;
    uint256 public investorHardCap = 5000000000000000000000;

    mapping(address => uint256) public contributions;

    
    mapping (address => CustomContract) public customBonuses;

    
    bool crowdsaleConcluded = false;

    constructor(uint256 _rate,
        address _wallet,
        ERC20 _token,
        uint256 _cap)
    Crowdsale(_rate, _wallet, _token)
    CappedCrowdsale(_cap)
    Ownable()
    public{
    }


    function _preValidatePurchase(
        address _beneficiary,
        uint256 _weiAmount
    )
    internal
    {
        require(!hasEnded());
        super._preValidatePurchase(_beneficiary, _weiAmount);
        uint256 _existingContribution = contributions[_beneficiary];
        uint256 _newContribution = _existingContribution.add(_weiAmount);
        require(_weiAmount >= investorMinCap && _weiAmount <= investorHardCap);
        contributions[_beneficiary] = _newContribution;
    }

    
    function _getTokenAmount(uint256 _weiAmount) internal view returns (uint256) {
        uint256 tokens = getBaseAmount(_weiAmount);
        uint256 percentage = 0;

         
        if (customBonuses[msg.sender].isSpecial == true) {
            percentage = 40;

        
        } else {

          if ( stage == CrowdsaleStage.PrivateICO ) {
            percentage = 40;
          } else if ( stage == CrowdsaleStage.PreICO ) {
            percentage = 20;
          } else if ( stage == CrowdsaleStage.ICO) {
            
            if (msg.value >= 100 ether) {
              percentage = 20;
            } else if (msg.value >= 50 ether) {
              percentage = 10;
            } else if (msg.value >= 10 ether) {
              percentage = 5;
            }
          }

        }

        tokens += tokens.mul(percentage).div(100);

        assert(tokens > 0);

        return (tokens);
    }

    
    function setCrowdsaleStage(uint value) onlyOwner public  {

        CrowdsaleStage _stage;

        if (uint(CrowdsaleStage.PrivateICO) == value) {
          _stage = CrowdsaleStage.PrivateICO;
        } else if (uint(CrowdsaleStage.PreICO) == value) {
          _stage = CrowdsaleStage.PreICO;
        } else if (uint(CrowdsaleStage.ICO) == value) {
          _stage = CrowdsaleStage.ICO;
        }

        stage = _stage;
    }

    function setCustomBonus(address _contract, bool _isReferral, bool _isSpecial, address _referralAddress) onlyOwner public {
      require(_contract != address(0));

      customBonuses[_contract] = CustomContract({
          isReferral: _isReferral,
          isSpecial: _isSpecial,
          referralAddress: _referralAddress
      });
    }

    function getBaseAmount(uint256 _weiAmount) public view returns (uint256) {
        return _weiAmount.mul(rate);
    }

    

    
    

    function finish(address _teamFund, address _ecosystemFund, address _bountyFund, address _operationsFund) public onlyOwner {

        require(!hasEnded());
        uint256 alreadyMinted = token.totalSupply();
        require(alreadyMinted < maxTokens);

        uint256 unsoldTokens = totalTokensForSale.add(tokensForMarketing).sub(alreadyMinted);
        if (unsoldTokens > 0) {
          tokensForEcosystem = tokensForEcosystem.add(unsoldTokens);
        }

        MintableToken(address(token)).mint(_teamFund,tokensForTeam);
        MintableToken(address(token)).mint(_ecosystemFund,tokensForEcosystem);
        MintableToken(address(token)).mint(_bountyFund,tokensForBounty);
        MintableToken(address(token)).mint(_operationsFund,tokensForOperations);

        endSale();
    }

    
    function hasEnded() public view returns (bool) {
        return crowdsaleConcluded;
    }

    

    function endSale() onlyOwner internal {
      
      crowdsaleConcluded = true;
      MintableToken(address(token)).transferOwnership(msg.sender);

    }




}