pragma solidity ^0.4.23;
// produced by the Solididy File Flattener (c) David Appleton 2018
// contact : dave@akomba.com
// released under Apache 2.0 licence
contract GoConfig {
    string public constant NAME = "GOeureka";
    string public constant SYMBOL = "GOT";
    uint8 public constant DECIMALS = 18;
    uint public constant DECIMALSFACTOR = 10 ** uint(DECIMALS);
    uint public constant TOTALSUPPLY = 1000000000 * DECIMALSFACTOR;
}


contract Ownable {
  address public owner;


  event OwnershipRenounced(address indexed previousOwner);
  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;
  }

  /**
   * @dev Allows the current owner to relinquish control of the contract.
   */
  function renounceOwnership() public onlyOwner {
    emit OwnershipRenounced(owner);
    owner = address(0);
  }
}

contract WhiteListedBasic {
    function addWhiteListed(address[] addrs) external;
    function removeWhiteListed(address addr) external;
    function isWhiteListed(address addr) external view returns (bool);
}
library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  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;
  }

  /**
  * @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 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 OperatableBasic {
    function setMinter (address addr) external;
    function setWhiteLister (address addr) external;
}
contract gotTokenSaleConfig is GoConfig {
    uint public constant MIN_PRESALE = 5 ether;
    uint public constant MIN_PRESALE2 = 1 ether;
    

    uint public constant VESTING_AMOUNT = 100000000 * DECIMALSFACTOR;
    address public constant VESTING_WALLET = 0x8B6EB396eF85D2a9ADbb79955dEB5d77Ee61Af88;
        
    uint public constant RESERVE_AMOUNT = 300000000 * DECIMALSFACTOR;
    address public constant RESERVE_WALLET = 0x8B6EB396eF85D2a9ADbb79955dEB5d77Ee61Af88;

    uint public constant PRESALE_START = 1529035246; // Friday, June 15, 2018 12:00:46 PM GMT+08:00
    uint public constant SALE_START = PRESALE_START + 4 weeks;
        
    uint public constant SALE_CAP = 600000000 * DECIMALSFACTOR;

    address public constant MULTISIG_ETH = RESERVE_WALLET;

}
contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  /**
   * @dev Modifier to make a function callable only when the contract is not paused.
   */
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  /**
   * @dev Modifier to make a function callable only when the contract is paused.
   */
  modifier whenPaused() {
    require(paused);
    _;
  }

  /**
   * @dev called by the owner to pause, triggers stopped state
   */
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    emit Pause();
  }

  /**
   * @dev called by the owner to unpause, returns to normal state
   */
  function unpause() onlyOwner whenPaused public {
    paused = false;
    emit Unpause();
  }
}

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(_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;
  }

  /**
  * @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 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 Operatable is Claimable, OperatableBasic {
    address public minter;
    address public whiteLister;
    address public launcher;

    event NewMinter(address newMinter);
    event NewWhiteLister(address newwhiteLister);

    modifier canOperate() {
        require(msg.sender == minter || msg.sender == whiteLister || msg.sender == owner);
        _;
    }

    constructor() public {
        minter = owner;
        whiteLister = owner;
        launcher = owner;
    }

    function setMinter (address addr) external onlyOwner {
        minter = addr;
        emit NewMinter(minter);
    }

    function setWhiteLister (address addr) external onlyOwner {
        whiteLister = addr;
        emit NewWhiteLister(whiteLister);
    }

    modifier ownerOrMinter()  {
        require ((msg.sender == minter) || (msg.sender == owner));
        _;
    }

    modifier onlyLauncher()  {
        require (msg.sender == launcher);
        _;
    }

    modifier onlyWhiteLister()  {
        require (msg.sender == whiteLister);
        _;
    }
}
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 BurnableToken is BasicToken {

  event Burn(address indexed burner, uint256 value);

  /**
   * @dev Burns a specific amount of tokens.
   * @param _value The amount of token to be burned.
   */
  function burn(uint256 _value) public {
    _burn(msg.sender, _value);
  }

  function _burn(address _who, uint256 _value) internal {
    require(_value <= balances[_who]);
    // no need to require value <= totalSupply, since that would imply the
    // sender's balance is greater than the totalSupply, which *should* be an assertion failure

    balances[_who] = balances[_who].sub(_value);
    totalSupply_ = totalSupply_.sub(_value);
    emit Burn(_who, _value);
    emit Transfer(_who, address(0), _value);
  }
}

contract Salvageable is Operatable {
    // Salvage other tokens that are accidentally sent into this token
    function emergencyERC20Drain(ERC20 oddToken, uint amount) public onlyLauncher {
        if (address(oddToken) == address(0)) {
            launcher.transfer(amount);
            return;
        }
        oddToken.transfer(launcher, amount);
    }
}
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][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;
  }

  /**
   * @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 increaseApproval(
    address _spender,
    uint _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 decreaseApproval(
    address _spender,
    uint _subtractedValue
  )
    public
    returns (bool)
  {
    uint 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 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);
  }
}

contract GOeureka is  Salvageable, PausableToken, BurnableToken, GoConfig {
    using SafeMath for uint;
 
    string public name = NAME;
    string public symbol = SYMBOL;
    uint8 public decimals = DECIMALS;
    bool public mintingFinished = false;

    event Mint(address indexed to, uint amount);
    event MintFinished();

    modifier canMint() {
        require(!mintingFinished);
        _;
    }

    constructor() public {
        paused = true;
    }

    function mint(address _to, uint _amount) ownerOrMinter canMint public returns (bool) {
        require(totalSupply_.add(_amount) <= TOTALSUPPLY);
        totalSupply_ = totalSupply_.add(_amount);
        balances[_to] = balances[_to].add(_amount);
        emit Mint(_to, _amount);
        emit Transfer(address(0), _to, _amount);
        return true;
    }

    function finishMinting() ownerOrMinter canMint public returns (bool) {
        mintingFinished = true;
        emit MintFinished();
        return true;
    }

    function sendBatchCS(address[] _recipients, uint[] _values) external ownerOrMinter returns (bool) {
        require(_recipients.length == _values.length);
        uint senderBalance = balances[msg.sender];
        for (uint i = 0; i < _values.length; i++) {
            uint value = _values[i];
            address to = _recipients[i];
            require(senderBalance >= value);        
            senderBalance = senderBalance - value;
            balances[to] += value;
            emit Transfer(msg.sender, to, value);
        }
        balances[msg.sender] = senderBalance;
        return true;
    }

    // Lifted from ERC827

      /**
   * @dev Addition to ERC20 token methods. Transfer tokens to a specified
   * @dev address and execute a call with the sent data on the same transaction
   *
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amout of tokens to be transfered
   * @param _data ABI-encoded contract call to call `_to` address.
   *
   * @return true if the call function was executed successfully
   */
    function transferAndCall(
        address _to,
        uint256 _value,
        bytes _data
    )
    public
    payable
    whenNotPaused
    returns (bool)
    {
        require(_to != address(this));

        super.transfer(_to, _value);

        // solium-disable-next-line security/no-call-value
        require(_to.call.value(msg.value)(_data));
        return true;
    }


}

contract GOeurekaSale is Claimable, gotTokenSaleConfig, Pausable, Salvageable {
    using SafeMath for uint256;

    // The token being sold
    GOeureka public token;

    WhiteListedBasic public whiteListed;

    uint256 public presaleEnd;
    uint256 public saleEnd;

    // Minimum contribution is now calculated
    uint256 public minContribution;

    // address where funds are collected
    address public multiSig;

    // amount of raised funds in wei from private, presale and main sale
    uint256 public weiRaised;

    // amount of raised tokens
    uint256 public tokensRaised;

    // number of participants
    mapping(address => uint256) public contributions;
    uint256 public numberOfContributors = 0;

    //  for rate
    uint public basicRate;
 
    // EVENTS

    event TokenPurchase(address indexed beneficiary, uint256 value, uint256 amount);
    event SaleClosed();
    event HardcapReached();
    event NewCapActivated(uint256 newCap);

 
    // CONSTRUCTOR

    constructor(GOeureka token_, WhiteListedBasic _whiteListed) public {

        basicRate = 3000;  // TokensPerEther
        calculateRates();
        
        presaleEnd = 1536508800; //20180910 00:00 +8
        saleEnd = 1543593600; //20181201 00:00 +8

        multiSig = MULTISIG_ETH;

        // NOTE - toke
        token = token_;

        whiteListed = _whiteListed;
    }

    // This sale contract must be the minter before we mintAllocations or do anything else.
    //
    bool allocated = false;
    function mintAllocations() external onlyOwner {
        require(!allocated);
        allocated = true;
        token.mint(VESTING_WALLET,VESTING_AMOUNT);
        token.mint(RESERVE_WALLET,RESERVE_AMOUNT);
    }

    function setWallet(address _newWallet) public onlyOwner {
        multiSig = _newWallet;
    } 


    // @return true if crowdsale event has ended
    function hasEnded() public view returns (bool) {
        if (now > saleEnd)
            return true;
        if (tokensRaised >= SALE_CAP)
            return true; // if we reach the tokensForSale
        return false;
    }

    // Buyer must be whitelisted
    function isWhiteListed(address beneficiary) internal view returns (bool) {
        return whiteListed.isWhiteListed(beneficiary);
    }

    modifier onlyAuthorised(address beneficiary) {
        require(isWhiteListed(beneficiary),"Not authorised");
        
        require (!hasEnded(),"ended");
        require (multiSig != 0x0,"MultiSig empty");
        require ((msg.value > minContribution) || (tokensRaised.add(getTokens(msg.value)) == SALE_CAP),"Value too small");
        _;
    }

    function setNewRate(uint newRate) onlyOwner public {
        require(weiRaised == 0);
        require(1000 < newRate && newRate < 10000);
        basicRate = newRate;
        calculateRates();
    }

    function calculateRates() internal {
        minContribution = uint(100 * DECIMALSFACTOR).div(basicRate);
    }


    function getTokens(uint256 amountInWei) 
    internal
    view
    returns (uint256 tokens)
    {
        if (now <= presaleEnd) {
            uint theseTokens = amountInWei.mul(basicRate).mul(1125).div(1000);
            require((amountInWei >= 1 ether) || (tokensRaised.add(theseTokens)==SALE_CAP));
            return (theseTokens);
        }
        if (now <= saleEnd) { 
            return (amountInWei.mul(basicRate));
        }
        revert();
    }

  
    // low level token purchase function
    function buyTokens(address beneficiary, uint256 value)
        internal
        onlyAuthorised(beneficiary) 
        whenNotPaused
    {
        uint256 newTokens;
 
        newTokens = getTokens(value);
        weiRaised = weiRaised.add(value);
        // if we have bridged two tranches....
        if (contributions[beneficiary] == 0) {
            numberOfContributors++;
        }
        contributions[beneficiary] = contributions[beneficiary].add(value);
        tokensRaised = tokensRaised.add(newTokens);
        token.mint(beneficiary,newTokens);
        emit TokenPurchase(beneficiary, value, newTokens);
        multiSig.transfer(value);
    }

    function placeTokens(address beneficiary, uint256 tokens) 
        public       
        onlyOwner
    {
        require(!hasEnded());
        tokensRaised = tokensRaised.add(tokens);
        token.mint(beneficiary,tokens);
    }


    // Complete the sale
    function finishSale() public onlyOwner {
        require(hasEnded());
        token.finishMinting();
        emit SaleClosed();
    }

    // fallback function can be used to buy tokens
    function () public payable {
        buyTokens(msg.sender, msg.value);
    }

}