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• library SafeMath
•    - function mul(uint a, uint b)
•    - function div(uint a, uint b)
•    - function sub(uint a, uint b)
•    - function add(uint a, uint b)
•    - function max64(uint64 a, uint64 b)
•    - function min64(uint64 a, uint64 b)
•    - function max256(uint256 a, uint256 b)
•    - function min256(uint256 a, uint256 b)
•  contract ERC20
•    - function balanceOf(address _owner)
•    - function transfer(address _to, uint _ ...
•    - function transferFrom(address _from, ...
•    - function approve(address _spender, ui ...
•    - function allowance(address _owner, ad ...
•  contract TKT is ERC20
•    - function TKT(address _ico)
•    - function mint(address _holder, uint _ ...
•    - function defrost()
•    - function burn(uint256 _value)
•    - function balanceOf(address _owner)
•    - function transfer(address _to, uint25 ...
•    - function transferFrom(address _from, ...
•    - function approve(address _spender, ui ...
•    - function allowance(address _owner, ad ...
•  contract CryptoTicketsICO *
•    - function CryptoTicketsICO(address _tk ...
•    - function setRate(uint _RateEth)
•    - function startIco()
•    - function pauseIco()
•    - function finishIco()
•    - function()
•    - function buyForInvestor(address _inve ...
•    - function swapToken(address _investor)
•    - function buy(address _investor, uint ...
•    - function withdrawEther(uint256 _value ...

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/**
 *Submitted for verification at Etherscan.io on 2017-11-26
*/

pragma solidity ^0.4.13;

library SafeMath {
    function mul(uint a, uint b) internal returns (uint) {
        uint c = a * b;
        assert(a == 0 || c / a == b);
        return c;
    }
    function div(uint a, uint b) internal returns (uint) {
        assert(b > 0);
        uint c = a / b;
        assert(a == b * c + a % b);
        return c;
    }
    function sub(uint a, uint b) internal returns (uint) {
        assert(b <= a);
        return a - b;
     }
    function add(uint a, uint b) internal returns (uint) {
         uint c = a + b;
         assert(c >= a);
         return c;
     }
    function max64(uint64 a, uint64 b) internal constant returns (uint64) {
        return a >= b ? a : b;
     }

    function min64(uint64 a, uint64 b) internal constant returns (uint64) {
        return a < b ? a : b;
    }

    function max256(uint256 a, uint256 b) internal constant returns (uint256) {
        return a >= b ? a : b;
    }

    function min256(uint256 a, uint256 b) internal constant returns (uint256) {
        return a < b ? a : b;
    }
}

contract ERC20 {
    uint public totalSupply = 0;

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

    function balanceOf(address _owner) constant returns (uint);
    function transfer(address _to, uint _value) returns (bool);
    function transferFrom(address _from, address _to, uint _value) returns (bool);
    function approve(address _spender, uint _value) returns (bool);
    function allowance(address _owner, address _spender) constant returns (uint);

    event Transfer(address indexed _from, address indexed _to, uint _value);
    event Approval(address indexed _owner, address indexed _spender, uint _value);

} // Functions of ERC20 standard

contract TKT  is ERC20 {
    using SafeMath for uint;

    string public name = "CryptoTickets COIN";
    string public symbol = "TKT";
    uint public decimals = 18;

    address public ico;

    event Burn(address indexed from, uint256 value);

    bool public tokensAreFrozen = true;

    modifier icoOnly { require(msg.sender == ico); _; }

    function TKT(address _ico) {
       ico = _ico;
    }


    function mint(address _holder, uint _value) external icoOnly {
       require(_value != 0);
       balances[_holder] = balances[_holder].add(_value);
       totalSupply = totalSupply.add(_value);
       Transfer(0x0, _holder, _value);
    }


    function defrost() external icoOnly {
       tokensAreFrozen = false;
    }

    function burn(uint256 _value) {
       require(!tokensAreFrozen);
       balances[msg.sender] = balances[msg.sender].sub(_value);
       totalSupply = totalSupply.sub(_value);
       Burn(msg.sender, _value);
    }


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


    function transfer(address _to, uint256 _amount) returns (bool) {
        require(!tokensAreFrozen);
        balances[msg.sender] = balances[msg.sender].sub(_amount);
        balances[_to] = balances[_to].add(_amount);
        Transfer(msg.sender, _to, _amount);
        return true;
    }


    function transferFrom(address _from, address _to, uint256 _amount) returns (bool) {
        require(!tokensAreFrozen);
        balances[_from] = balances[_from].sub(_amount);
        allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
        balances[_to] = balances[_to].add(_amount);
        Transfer(_from, _to, _amount);
        return true;
     }


    function approve(address _spender, uint256 _amount) returns (bool) {
        // 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));

        allowed[msg.sender][_spender] = _amount;
        Approval(msg.sender, _spender, _amount);
        return true;
    }


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

contract CryptoTicketsICO {
    using SafeMath for uint;

    uint public constant Tokens_For_Sale = 525000000*1e18; // Tokens for Sale without bonuses(HardCap)

    // Style: Caps should not be used for vars, only for consts!
    uint public Rate_Eth = 298; // Rate USD per ETH
    uint public Token_Price = 25 * Rate_Eth; // tkt per ETH
    uint public SoldNoBonuses = 0; //Sold tokens without bonuses

    mapping(address => bool) swapped;

    event LogStartICO();
    event LogPauseICO();
    event LogFinishICO(address bountyFund, address advisorsFund, address itdFund, address storageFund);
    event LogBuyForInvestor(address investor, uint tokenValue, string txHash);
    event LogSwapToken(address investor, uint tokenValue);

    TKT public token = new TKT(this);
    TKT public tkt;

    address public Company;
    address public BountyFund;
    address public AdvisorsFund;
    address public ItdFund;
    address public StorageFund;

    address public Manager; // Manager controls contract
    address public SwapManager;
    address public Controller_Address1; // First address that is used to buy tokens for other cryptos
    address public Controller_Address2; // Second address that is used to buy tokens for other cryptos
    address public Controller_Address3; // Third address that is used to buy tokens for other cryptos
    modifier managerOnly { require(msg.sender == Manager); _; }
    modifier controllersOnly { require((msg.sender == Controller_Address1) || (msg.sender == Controller_Address2) || (msg.sender == Controller_Address3)); _; }
    modifier swapManagerOnly { require(msg.sender == SwapManager); _; }

    uint bountyPart = 2; // 2% of TotalSupply for BountyFund
    uint advisorsPart = 35; //3,5% of TotalSupply for AdvisorsFund
    uint itdPart = 15; //15% of TotalSupply for ItdFund
    uint storagePart = 3; //3% of TotalSupply for StorageFund
    uint icoAndPOfPart = 765; // 76,5% of TotalSupply for PublicICO and PrivateOffer
    enum StatusICO { Created, Started, Paused, Finished }
    StatusICO statusICO = StatusICO.Created;


    function CryptoTicketsICO(address _tkt, address _Company, address _BountyFund, address _AdvisorsFund, address _ItdFund, address _StorageFund, address _Manager, address _Controller_Address1, address _Controller_Address2, address _Controller_Address3, address _SwapManager){
       tkt = TKT(_tkt);
       Company = _Company;
       BountyFund = _BountyFund;
       AdvisorsFund = _AdvisorsFund;
       ItdFund = _ItdFund;
       StorageFund = _StorageFund;
       Manager = _Manager;
       Controller_Address1 = _Controller_Address1;
       Controller_Address2 = _Controller_Address2;
       Controller_Address3 = _Controller_Address3;
       SwapManager = _SwapManager;
    }

// function for changing rate of ETH and price of token


    function setRate(uint _RateEth) external managerOnly {
       Rate_Eth = _RateEth;
       Token_Price = 25*Rate_Eth;
    }


//ICO status functions

    function startIco() external managerOnly {
       require(statusICO == StatusICO.Created || statusICO == StatusICO.Paused);
       LogStartICO();
       statusICO = StatusICO.Started;
    }

    function pauseIco() external managerOnly {
       require(statusICO == StatusICO.Started);
       statusICO = StatusICO.Paused;
       LogPauseICO();
    }


    function finishIco() external managerOnly { // Funds for minting of tokens

       require(statusICO == StatusICO.Started);

       uint alreadyMinted = token.totalSupply(); //=PublicICO+PrivateOffer
       uint totalAmount = alreadyMinted * 1000 / icoAndPOfPart;


       token.mint(BountyFund, bountyPart * totalAmount / 100); // 2% for Bounty
       token.mint(AdvisorsFund, advisorsPart * totalAmount / 1000); // 3.5% for Advisors
       token.mint(ItdFund, itdPart * totalAmount / 100); // 15% for Ticketscloud ltd
       token.mint(StorageFund, storagePart * totalAmount / 100); // 3% for Storage

       token.defrost();

       statusICO = StatusICO.Finished;
       LogFinishICO(BountyFund, AdvisorsFund, ItdFund, StorageFund);
    }

// function that buys tokens when investor sends ETH to address of ICO
    function() external payable {

       buy(msg.sender, msg.value * Token_Price);
    }

// function for buying tokens to investors who paid in other cryptos

    function buyForInvestor(address _investor, uint _tokenValue, string _txHash) external controllersOnly {
       buy(_investor, _tokenValue);
       LogBuyForInvestor(_investor, _tokenValue, _txHash);
    }

//function for buying tokens for investors

    function swapToken(address _investor) swapManagerOnly{
         require(statusICO != StatusICO.Finished);
         require(swapped[_investor] == false);
         uint tktTokens = tkt.balanceOf(_investor);
         require(tktTokens > 0);
         swapped[_investor] = true;
         token.mint(_investor, tktTokens);

         LogSwapToken(_investor, tktTokens);
    }
// internal function for buying tokens

    function buy(address _investor, uint _tokenValue) internal {
       require(statusICO == StatusICO.Started);
       require(_tokenValue > 0);
       require(SoldNoBonuses + _tokenValue <= Tokens_For_Sale);
       token.mint(_investor, _tokenValue);

       SoldNoBonuses = SoldNoBonuses.add(_tokenValue);
    }




//function to withdraw ETH from smart contract

    function withdrawEther(uint256 _value) external managerOnly {
       require(statusICO == StatusICO.Finished);
       Company.transfer(_value);
    }

}

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