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/**
 *Submitted for verification at Etherscan.io on 2018-11-23
*/

pragma solidity 0.4.25;

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 BasicToken is ERC20Basic {
  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(_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 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 Ownable {
  address public owner;


  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 transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) public onlyOwner {
    require(newOwner != address(0));
    emit OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

contract Claimable is Ownable {
  address public pendingOwner;

  /**
   * @dev Modifier throws if called by any account other than the pendingOwner.
   */
  modifier onlyPendingOwner() {
    require(msg.sender == pendingOwner);
    _;
  }

  /**
   * @dev Allows the current owner to set the pendingOwner address.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) onlyOwner public {
    pendingOwner = newOwner;
  }

  /**
   * @dev Allows the pendingOwner address to finalize the transfer.
   */
  function claimOwnership() onlyPendingOwner public {
    emit OwnershipTransferred(owner, pendingOwner);
    owner = pendingOwner;
    pendingOwner = address(0);
  }
}

contract Pausable {
    address public requester;
    address public approver;

    bool public paused = true;
    bool public pausePending = false;
    bool public unpausePending = false;

    function requestPause() public onlyRequester {
        pausePending = true;
        unpausePending = false;
    }

    function requestUnpause() public onlyRequester {
        pausePending = false;
        unpausePending = true;
    }

    function cancelRequestPause() public onlyRequester {
        pausePending = false;
    }

    function approveRequestPause() public onlyApprover {
        require(pausePending);
        pausePending = false;
        paused = true;
    }

    function rejectRequestPause() public onlyApprover {
        pausePending = false;
    }

    function cancelRequestUnpause() public onlyRequester {
        unpausePending = false;
    }

    function approveRequestUnpause() public onlyApprover {
        require(unpausePending);
        unpausePending = false;
        paused = false;
    }

    function rejectRequestUnpause() public onlyApprover {
        unpausePending = false;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier whenPaused() {
        require(paused);
        _;
    }

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

    modifier onlyRequester() {
        require(msg.sender == requester);
        _;
    }

    modifier onlyApprover() {
        require(msg.sender == approver);
        _;
    }
}

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 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 increaseAllowance(
    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 decreaseAllowance(
    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 StacsToken is StandardToken, Claimable, Pausable {
    using SafeMath for uint256;

    uint8 public constant decimals = 18;
    string public constant symbol = "STACS";
    string public constant name = "STACS";
    uint256 private constant MAX_TOKEN_SUPPLY = 900000000 * (10 ** uint256(decimals));
    bool public migrationPhase = true;
    address public migrationOperator;

    constructor(address _migrationOperator, address _requester, address _approver) public {
        owner = msg.sender;
        migrationOperator = _migrationOperator;
        requester = _requester;
        approver = _approver;
    }

    /**
    * @dev Mint specified number of tokens to respective address. Can only be called during migration phase
    * @param _accounts The target addresses to transfer to.
    * @param _amounts The amounts to be transferred.
    */
    function mint(address[] _accounts, uint256[] _amounts) public onlyMigrationOperator {
        require(migrationPhase);
        uint256 length = _accounts.length;
        require(length == _amounts.length);
        for (uint256 i = 0; i < length; i++) {
            balances[_accounts[i]] = balances[_accounts[i]].add(_amounts[i]);
            emit Transfer(address(0), _accounts[i], _amounts[i]);
            totalSupply_ = totalSupply_.add(_amounts[i]);
        }
        require(totalSupply_ <= MAX_TOKEN_SUPPLY);
    }

    /**
    * @dev End migration phase and disallow minting
    */
    function endMigration() public onlyOwner {
        migrationPhase = false;
    }

    /**
    * @dev Transfer any ERC20 token belonging to this contract to owner
    * @param tokenAddress The target ERC20 token address
    * @param tokens The amount of tokens to be transferred
    */
    function transferAnyERC20Token(address tokenAddress, uint256 tokens) public onlyOwner returns (bool success) {
        return ERC20Basic(tokenAddress).transfer(owner, tokens);
    }

    modifier onlyMigrationOperator() {
        require(msg.sender == migrationOperator);
        _;
    }

    // Overriden methods
    function transfer(address _to, uint256 _value) public whenNotPaused returns (bool success) {
        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 increaseAllowance(address spender, uint addedValue) public whenNotPaused returns (bool success) {
        return super.increaseAllowance(spender, addedValue);
    }

    function decreaseAllowance(address spender, uint subtractedValue) public whenNotPaused returns (bool success) {
        return super.decreaseAllowance(spender, subtractedValue);
    }
}

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000000000000000000000000e96e68ebff436df211efa1c0d60ef07f0df61d3a000000000000000000000000e96e68ebff436df211efa1c0d60ef07f0df61d3a000000000000000000000000cb9d41149a868f24218afb65628ae45bccf501cb

-----Decoded View---------------
Arg [0] : _migrationOperator (address): 0xe96e68eBFF436dF211eFa1c0d60eF07f0df61d3a
Arg [1] : _requester (address): 0xe96e68eBFF436dF211eFa1c0d60eF07f0df61d3a
Arg [2] : _approver (address): 0xCB9D41149a868f24218Afb65628AE45Bccf501cb

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000e96e68ebff436df211efa1c0d60ef07f0df61d3a
Arg [1] : 000000000000000000000000e96e68ebff436df211efa1c0d60ef07f0df61d3a
Arg [2] : 000000000000000000000000cb9d41149a868f24218afb65628ae45bccf501cb

bzzr://e80d334af0d728ddae1a58ac101db91fc3c8e77203247b16635409bfdf1e3b32