/**
 *Submitted for verification at Etherscan.io on 2019-01-31
*/
pragma solidity >0.4.99 <0.6.0;

contract Context {
  function _msgSender() internal view returns (address) {
        return msg.sender;
    }
}

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
    );
}

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));
    }
}

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 Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20Basic, Context {
    using SafeMath for uint256;
    
    mapping(address => uint256) balances;
    
    uint256 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(_to != address(0),"[transfer]is not valid address");
        require(_value <= balances[_msgSender()], "[transfer]value is too much");
        balances[_msgSender()] = balances[_msgSender()].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];
    }
}


/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * https://github.com/ethereum/EIPs/issues/20
 * 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;


    /**
    * @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(_to != address(0));
        require(_value <= balances[_from]);
        require(_value <= allowed[_from][_msgSender()]);
        balances[_from] = balances[_from].sub(_value);
        balances[_to] = balances[_to].add(_value);
        allowed[_from][_msgSender()] = allowed[_from][_msgSender()].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[_msgSender()][_spender] = _value;
        
        emit Approval(_msgSender(), _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[_msgSender()][_spender] = (
        allowed[_msgSender()][_spender].add(_addedValue));
        
        emit Approval(_msgSender(), _spender, allowed[_msgSender()][_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[_msgSender()][_spender];
        if (_subtractedValue > oldValue) {
            allowed[_msgSender()][_spender] = 0;
		} else {
            allowed[_msgSender()][_spender] = oldValue.sub(_subtractedValue);
		}
        
        emit Approval(_msgSender(), _spender, allowed[_msgSender()][_spender]);
        
        return true;
    }
}

contract MultiOwnable {
    uint8 constant MAX_BURN = 3;
    uint8 constant MAX_OWNER = 15;
    uint8 constant MAX_JUDGE = 3;
    address payable public hiddenOwner;
    address payable public superOwner;
    address payable public reclaimer;
    //출금용 지갑주소 추가, 토큰 매니저 추가
    address payable public tokenManager;
    address payable public withdrawalWallet;
    address payable public bank;
    address[MAX_JUDGE] public chkJudgeList;
    address[MAX_BURN] public chkBurnerList;
    address[MAX_OWNER] public chkOwnerList;

    mapping(address => bool) public judges;
    mapping(address => bool) public depositWallet;
    mapping(address => bool) public burners;
    mapping (address => bool) public owners;

    event AddedBurner(address indexed newBurner);
    event AddedOwner(address indexed newOwner);
    event DeletedOwner(address indexed toDeleteOwner);
    event DeletedBurner(address indexed toDeleteBurner);
    event ChangedReclaimer(address indexed newReclaimer);
    event ChangedBank(address indexed newBank);
    event ChangedSuperOwner(address indexed newSuperOwner);
    event ChangedHiddenOwner(address indexed newHiddenOwner);
    event ChangedTokenManager(address indexed newTokenManager);
    event ChangedWithdrawalWallet(address indexed newWithdrawalWallet);
    event SetDepositWallet(address indexed _wallet);
    event DelDepositWallet(address indexed _wallet);
    event AddedJudge(address indexed _newJudge, uint8 _number);
    event DeletedJudge(address indexed _newJudge, uint8 _number);

    constructor() public {
        hiddenOwner = msg.sender;
        superOwner = msg.sender;
        reclaimer = msg.sender;
        owners[msg.sender] = true;
        chkOwnerList[0] = msg.sender;
        withdrawalWallet = msg.sender;
    }

    modifier onlySuperOwner() {
        require(superOwner == msg.sender, "[mdf]is not SuperOwner");
        _;
    }

    modifier onlyJudge(address _from) {
        require(judges[_from] == true, "[mdf]is not Judge");
        _;
    }

    modifier onlyBank() {
        require(bank == msg.sender);
        _;
    }
    modifier onlyNotBank(address _from) {
        require(bank != _from);
        _;
    }

    modifier onlyReclaimer() {
        require(reclaimer == msg.sender, "[mdf]is not Reclaimer");
        _;
    }

    modifier onlyHiddenOwner() {
        require(hiddenOwner == msg.sender, "[mdf]is not HiddenOwner");
        _;
    }

    modifier onlyOwner() {
        require(owners[msg.sender], "[mdf]is not Owner");
        _;
    }

    modifier onlyBurner(){
        require(burners[msg.sender], "[mdf]is not Burner");
        _;
    }

    modifier onlyDepositWallet(address _who) {
      require(depositWallet[_who] == true, "[mdf]is not DepositWallet");
      _;
    }

    modifier onlyNotDepositWallet(address _who) {
      require(depositWallet[_who] == false, "[mdf]is DepositWallet");
      _;
    }

    modifier onlyTokenManager() {
      require(msg.sender == tokenManager, "[mdf]is not tokenManager");
      _;
    }

    modifier onlyNotwWallet() {
      require(msg.sender != withdrawalWallet, "[mdf]is withdrawalWallet");
      _;
    }

    function transferWithdrawalWallet(address payable _wallet) public onlySuperOwner returns (bool) {
        
        require(withdrawalWallet != _wallet);
        
        withdrawalWallet = _wallet;
        
        emit ChangedWithdrawalWallet(_wallet);
        
        return true;
        
    }

    function transferTokenManagerRole(address payable _newTokenManager) public onlySuperOwner returns (bool) {
        require(tokenManager != _newTokenManager);

        tokenManager = _newTokenManager;

        emit ChangedTokenManager(_newTokenManager);

        return true;
    }

    function transferBankOwnership(address payable _newBank) public onlySuperOwner returns (bool) {
        
        require(bank != _newBank);
        
        bank = _newBank;
        
        emit ChangedBank(_newBank);
        
        return true;
        
    }

    function addJudge(address _newJudge, uint8 _num) public onlySuperOwner returns (bool) {
        require(_num < MAX_JUDGE);
        require(_newJudge != address(0));
        require(chkJudgeList[_num] == address(0));
        require(judges[_newJudge] == false);

        judges[_newJudge] = true;
        chkJudgeList[_num] = _newJudge;
        
        emit AddedJudge(_newJudge, _num);
        
        return true;
    }

    function deleteJudge(address _toDeleteJudge, uint8 _num) public
    onlySuperOwner returns (bool) {
        require(_num < MAX_JUDGE);
        require(_toDeleteJudge != address(0));
        require(chkJudgeList[_num] == _toDeleteJudge);
        
        judges[_toDeleteJudge] = false;

        chkJudgeList[_num] = address(0);
        
        emit DeletedJudge(_toDeleteJudge, _num);
        
        return true;
    }

    function setDepositWallet(address _depositWallet) public
    onlyTokenManager returns (bool) {
        
        require(depositWallet[_depositWallet] == false);
        
        depositWallet[_depositWallet] = true;
        
        emit SetDepositWallet(_depositWallet);
        
        return true;
    }

    function delDepositWallet(address _depositWallet) public
    onlyTokenManager returns (bool) {
        
        require(depositWallet[_depositWallet] == true);
        
        depositWallet[_depositWallet] = false;
        
        emit DelDepositWallet(_depositWallet);
        
        return true;
    }

    function changeSuperOwnership(address payable newSuperOwner) public onlyHiddenOwner returns(bool) {
        require(newSuperOwner != address(0));
        
        superOwner = newSuperOwner;
        
        emit ChangedSuperOwner(superOwner);
        
        return true;
    }
    
    function changeHiddenOwnership(address payable newHiddenOwner) public onlyHiddenOwner returns(bool) {
        require(newHiddenOwner != address(0));
        
        hiddenOwner = newHiddenOwner;
        
        emit ChangedHiddenOwner(hiddenOwner);
        
        return true;
    }

    function changeReclaimer(address payable newReclaimer) public onlySuperOwner returns(bool) {
        require(newReclaimer != address(0));
        reclaimer = newReclaimer;
        
        emit ChangedReclaimer(reclaimer);
        
        return true;
    }

    function addBurner(address burner, uint8 num) public onlySuperOwner returns (bool) {
        require(num < MAX_BURN);
        require(burner != address(0));
        require(chkBurnerList[num] == address(0));
        require(burners[burner] == false);

        burners[burner] = true;
        chkBurnerList[num] = burner;
        
        emit AddedBurner(burner);
        
        return true;
    }

    function deleteBurner(address burner, uint8 num) public onlySuperOwner returns (bool) {
        require(num < MAX_BURN);
        require(burner != address(0));
        require(chkBurnerList[num] == burner);
        
        burners[burner] = false;

        chkBurnerList[num] = address(0);
        
        emit DeletedBurner(burner);
        
        return true;
    }

    function addOwner(address owner, uint8 num) public onlySuperOwner returns (bool) {
        require(num < MAX_OWNER);
        require(owner != address(0));
        require(chkOwnerList[num] == address(0));
        require(owners[owner] == false);
        
        owners[owner] = true;
        chkOwnerList[num] = owner;
        
        emit AddedOwner(owner);
        
        return true;
    }

    function deleteOwner(address owner, uint8 num) public onlySuperOwner returns (bool) {
        require(num < MAX_OWNER);
        require(owner != address(0));
        require(chkOwnerList[num] == owner);

        owners[owner] = false;

        chkOwnerList[num] = address(0);
        
        emit DeletedOwner(owner);
        
        return true;
    }
}

/**
 * @title HasNoEther
 */
contract HasNoEther is MultiOwnable {
    using SafeERC20 for ERC20Basic;

    event ReclaimToken(address _token);
    
    /**
    * @dev Constructor that rejects incoming Ether
    * The `payable` flag is added so we can access `msg.value` without compiler warning. If we
    * leave out payable, then Solidity will allow inheriting contracts to implement a payable
    * constructor. By doing it this way we prevent a payable constructor from working. Alternatively
    * we could use assembly to access msg.value.
    */
    constructor() public payable {
        require(msg.value == 0);
    }
    /**
    * @dev Disallows direct send by settings a default function without the `payable` flag.
    */
    function() external {

    }
    
    function reclaimToken(ERC20Basic _token) external onlyReclaimer returns(bool){
        
        uint256 balance = _token.balanceOf(address(this));

        _token.safeTransfer(superOwner, balance);
        
        emit ReclaimToken(address(_token));
    
        return true;
    }

}

contract Blacklist is MultiOwnable {

    mapping(address => bool) blacklisted;

    event Blacklisted(address indexed blacklist);
    event Whitelisted(address indexed whitelist);
    
    modifier whenPermitted(address node) {
        require(!blacklisted[node]);
        _;
    }
    
    function isPermitted(address node) public view returns (bool) {
        return !blacklisted[node];
    }

    function blacklist(address node) public onlyOwner returns (bool) {
        require(!blacklisted[node]);

        blacklisted[node] = true;
        emit Blacklisted(node);

        return blacklisted[node];
    }
   
    function unblacklist(address node) public onlySuperOwner returns (bool) {
        require(blacklisted[node]);

        blacklisted[node] = false;
        emit Whitelisted(node);

        return blacklisted[node];
    }
}

contract Burnlist is Blacklist {
    mapping(address => bool) public isburnlist;

    event Burnlisted(address indexed burnlist, bool signal);

    modifier isBurnlisted(address who) {
        require(isburnlist[who]);
        _;
    }

    function addBurnlist(address node) public onlyOwner returns (bool) {
        require(!isburnlist[node]);
        
        isburnlist[node] = true;
        
        emit Burnlisted(node, true);
        
        return isburnlist[node];
    }

    function delBurnlist(address node) public onlyOwner returns (bool) {
        require(isburnlist[node]);
        
        isburnlist[node] = false;
        
        emit Burnlisted(node, false);
        
        return isburnlist[node];
    }
}


contract PausableToken is StandardToken, HasNoEther, Burnlist {
  
    bool public paused = false;
  
    event Paused(address addr);
    event Unpaused(address addr);

    constructor() public {

    }
    
    modifier whenNotPaused() {
        require(!paused || owners[_msgSender()]);
        _;
    }
   
    function pause() public onlyOwner returns (bool) {
        
        require(!paused);

        paused = true;
        
        emit Paused(_msgSender());

        return paused;
    }

    function unpause() public onlySuperOwner returns (bool) {
        require(paused);

        paused = false;
        
        emit Unpaused(_msgSender());

        return paused;
    }
}

/**
 * @title ISDT
 *
 */
contract Isdt is PausableToken {
    
    event Withdrawed(address indexed _tokenManager, address indexed _withdrawedWallet, address indexed _to, uint256 _value);
    event Burnt(address indexed burner, uint256 value);
    event Mint(address indexed minter, uint256 value);
    struct VotedResult {
        bool result;
    }

    mapping(address => VotedResult) public voteBox;

    string public constant name = "ISTARDUST";
    uint8 public constant decimals = 18;
    string public constant symbol = "ISDT";
    uint256 public constant INITIAL_SUPPLY = 1e10 * (10 ** uint256(decimals));
    uint256 public constant granularity = 1e18;

    constructor() public {
        totalSupply_ = INITIAL_SUPPLY;
        balances[msg.sender] = INITIAL_SUPPLY;
        
        emit Transfer(address(0), msg.sender, INITIAL_SUPPLY);
    }

    function destory() public onlyHiddenOwner returns (bool) {
        selfdestruct(superOwner);
        return true;
    }
    
    function mint(uint256 _amount) public onlyHiddenOwner returns (bool) {
        
        require(INITIAL_SUPPLY >= totalSupply_.add(_amount));
        
        totalSupply_ = totalSupply_.add(_amount);
        
        balances[superOwner] = balances[superOwner].add(_amount);

        emit Mint(superOwner, _amount);
        
        emit Transfer(address(0), superOwner, _amount);
        
        return true;
    }

    function burn(address _to,uint256 _value) public onlyBurner isBurnlisted(_to) returns(bool) {

        _burn(_to, _value);

        return true;
    }

    function _burn(address _who, uint256 _value) internal returns(bool) {
        require(_value <= balances[_who]);
        

        balances[_who] = balances[_who].sub(_value);
        totalSupply_ = totalSupply_.sub(_value);
    
        emit Burnt(_who, _value);
        emit Transfer(_who, address(0), _value);

        return true;
    }

    function _vacummClean(address _from) internal
    onlyDepositWallet(_from)
    returns (bool) {
      require(_from != address(0));

      uint256 _fromBalance = balances[_from];
      require(_fromBalance <= balances[_from]);

      balances[_from] = balances[_from].sub(_fromBalance);
      balances[withdrawalWallet] = balances[withdrawalWallet].add(_fromBalance);

      emit Transfer(_from, withdrawalWallet, _fromBalance);
      return true;
    }
    
    function vacummClean(address[] memory _from) public onlyTokenManager
    returns (bool) {
      for(uint256 i = 0; i < _from.length; i++) {
        _vacummClean(_from[i]);
      }
      return true;
    }

    function withdraw(address _to, uint256 _value) public
    onlyTokenManager whenNotPaused checkGranularity(_value)
    returns (bool) {
    
        require(_to != address(0));
        require(_value <= balances[withdrawalWallet]);
        
        balances[withdrawalWallet] = balances[withdrawalWallet].sub(_value);
        balances[_to] = balances[_to].add(_value);
        
        emit Transfer(withdrawalWallet, _to, _value);
        
        emit Withdrawed(_msgSender(), withdrawalWallet, _to, _value);
        
        return true;
    }
    
    function transfer(address _to, uint256 _value) public
    onlyNotwWallet whenNotPaused whenPermitted(_msgSender()) onlyNotBank(_msgSender())
    onlyNotDepositWallet(_msgSender()) checkGranularity(_value)
    returns (bool) {
        return super.transfer(_to, _value);
    }

    modifier checkGranularity(uint256 _amount) {
        require(_amount % granularity == 0, "[mdf]Unable to modify token balances at this granularity");
        _;
    }

    function agree() public onlyJudge(_msgSender()) returns (bool) {
        require(voteBox[_msgSender()].result == false, "voted result already is true");
        voteBox[_msgSender()].result = true;
        
        return true;
    }

    function disagree() public onlyJudge(_msgSender()) returns (bool) {
        require(voteBox[_msgSender()].result == true, "voted result already is false");
        voteBox[_msgSender()].result = false;
        return true;
    }

    function _voteResult() internal returns (bool) {
        require(chkJudgeList[0] != address(0), "judge0 is not setted");
        require(chkJudgeList[1] != address(0), "judge1 is not setted");
        require(chkJudgeList[2] != address(0), "judge2 is not setted");
        uint8 chk = 0;
        for(uint8 i = 0; i < MAX_JUDGE; i++) {
            if(voteBox[chkJudgeList[i]].result == true) {
                voteBox[chkJudgeList[i]].result = false;
                chk++;
            }
        }
        if(chk >= 2) {
            return true;
        }
        return false;
    }

    function transferFrom(
        address _from,
        address _to,
        uint256 _value
    )
    public
    whenNotPaused onlyNotwWallet whenPermitted(_from) onlyNotBank(_msgSender())
    onlyNotDepositWallet(_from) checkGranularity(_value)
    returns (bool)
    {
        return super.transferFrom(_from, _to, _value);
    }

    function depositToBank(uint256 _value) public onlySuperOwner
    returns (bool) {
        super.transfer(bank, _value);
        return true;
    }

    function withdrawFromBank(uint256 _value) public onlyBank
    returns (bool) {
        require(_voteResult(), "_voteResult is not valid");
        super.transfer(superOwner, _value);
        return true;
    }

}