pragma solidity 0.4.24;

// File: contracts\misc\Ownable.sol

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable 
{
    address public owner;

    event OwnershipRenounced(address indexed previousOwner);
    event OwnershipTransferred(
      address indexed previousOwner,
      address indexed newOwner
    );

    constructor() public 
    {
        owner = msg.sender;
    }

    modifier onlyOwner() 
    {
        require(msg.sender == owner, "Incorrect Owner");
        _;
    }

    function transferOwnership(address _newOwner) public
    onlyOwner 
    {
        require(_newOwner != address(0), "Address should not be 0x0");
        emit OwnershipTransferred(owner, _newOwner);
        owner = _newOwner;
    }

    function renounceOwnership() public 
    onlyOwner 
    {
        emit OwnershipRenounced(owner);
        owner = address(0);
    }
}

// File: contracts\misc\SafeMath.sol

/**
 * @title SafeMath
 * @dev Math operations with safety checks that revert on error
 */
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;
    }
}

// File: contracts\token\ERC20Basic.sol

/**
 * @title ERC20 Basic interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
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);
}

// File: contracts\token\BasicToken.sol

contract BasicToken is ERC20Basic 
{
    using SafeMath for uint256;
    mapping(address => uint256) public balances;
    
    uint256 public totalSupply_;

    function totalSupply() public view 
    returns (uint256) 
    {
        return totalSupply_;
    }

    function transfer(address _to, uint256 _value) public 
    returns (bool) 
    {
        require(_to != address(0));
        require(_value <= balances[msg.sender]);

        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];
    }
}

// File: contracts\token\BurnableToken.sol

/**
 * @title Burnable Token
 * @dev Token that can be irreversibly burned (destroyed).
 */
contract BurnableToken is BasicToken, Ownable
{
    event Burn(address indexed burner, uint256 value);

    function burn(uint256 value) public
    onlyOwner
    {
        address burnAddress = msg.sender;
        require(value <= balances[burnAddress]);

        balances[burnAddress] = balances[burnAddress].sub(value);
        totalSupply_ = totalSupply_.sub(value);

        emit Burn(burnAddress, value);
    }
}

// File: contracts\token\ERC20.sol

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic 
{
    function allowance(address owner, address spender) public view returns (uint256);
    function transferFrom(address from, address to, uint256 value) public returns (bool);
    function approve(address spender, uint256 value) public returns (bool); 
    
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: contracts\token\StandardToken.sol

/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
 * Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract StandardToken is ERC20, BasicToken 
{
    mapping (address => mapping (address => uint256)) internal allowed;

    function transferFrom(address _from, address _to, uint256 _value) public
    returns (bool)
    {
        require(_to != address(0));
        require(_value <= balances[_from]);
        require(_value <= allowed[_from][msg.sender]);

        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;
    }

}

// File: contracts\token\MintableToken.sol

/**
 * @title Mintable token
 * @dev Simple ERC20 Token example, with mintable token creation
 * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
 */
contract MintableToken is StandardToken, Ownable 
{
    event Mint(address indexed to, uint256 amount);

    function mint(address _to, uint256 _amount) public
    onlyOwner
    returns (bool)
    {
        totalSupply_ = totalSupply_.add(_amount);
        balances[_to] = balances[_to].add(_amount);
        emit Mint(_to, _amount);
        emit Transfer(address(0), _to, _amount);
        return true;
    }
}

// File: contracts\misc\Pausable.sol

/**
 * @title Pausable
 * @dev Base contract which allows children to implement an emergency stop mechanism.
 */
contract Pausable is Ownable 
{
    event Pause();
    event Unpause();

    bool public paused = false;

    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();
    }
}

// File: contracts\token\PausableToken.sol

/**
 * @title Pausable token
 * @dev StandardToken modified with pausable transfers.
 **/
contract PausableToken is StandardToken, Pausable 
{
    function transfer(address _to, uint256 _value) public
    whenNotPaused
    returns (bool)
    {
        return super.transfer(_to, _value);
    }

    function transferFrom(address _from, address _to, uint256 _value) public
    whenNotPaused
    returns (bool)
    {
        return super.transferFrom(_from, _to, _value);
    }

    function approve(address _spender, uint256 _value) public
    whenNotPaused
    returns (bool)
    {
        return super.approve(_spender, _value);
    }

    function increaseApproval(address _spender, uint _addedValue) public
    whenNotPaused
    returns (bool success)
    {
        return super.increaseApproval(_spender, _addedValue);
    }

    function decreaseApproval(address _spender, uint _subtractedValue) public
    whenNotPaused
    returns (bool success)
    {
        return super.decreaseApproval(_spender, _subtractedValue);
    }
}

// File: contracts\IndexToken.sol

contract IndexToken is BurnableToken, MintableToken, PausableToken
{
    string constant public name = "DQR 30";
    string constant public symbol = "dqr30";

    uint public decimals = 18;
}