pragma solidity ^0.4.13;

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.
   */
  function Ownable() 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));
    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 {
    OwnershipTransferred(owner, pendingOwner);
    owner = pendingOwner;
    pendingOwner = address(0);
  }
}

library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  function mul(uint256 a, uint256 b) internal pure returns (uint256) {
    if (a == 0) {
      return 0;
    }
    uint256 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 c;
  }

  /**
  * @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) {
    uint256 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 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 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]);

    // SafeMath.sub will throw if there is not enough balance.
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    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 balance) {
    return balances[_owner];
  }

}

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);
    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;
    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);
    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);
    }
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}

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 {
    require(_value <= balances[msg.sender]);
    // 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

    address burner = msg.sender;
    balances[burner] = balances[burner].sub(_value);
    totalSupply_ = totalSupply_.sub(_value);
    Burn(burner, _value);
    Transfer(burner, address(0), _value);
  }
}

contract LuckchemyToken is BurnableToken, StandardToken, Claimable {

    bool public released = false;

    string public constant name = "Luckchemy";

    string public constant symbol = "LUK";

    uint8 public constant decimals = 8;

    uint256 public CROWDSALE_SUPPLY;

    uint256 public OWNERS_AND_PARTNERS_SUPPLY;

    address public constant OWNERS_AND_PARTNERS_ADDRESS = 0x603a535a1D7C5050021F9f5a4ACB773C35a67602;

    // Index of unique addresses
    uint256 public addressCount = 0;

    // Map of unique addresses
    mapping(uint256 => address) public addressMap;
    mapping(address => bool) public addressAvailabilityMap;

    //blacklist of addresses (product/developers addresses) that are not included in the final Holder lottery
    mapping(address => bool) public blacklist;

    // service agent for managing blacklist
    address public serviceAgent;

    event Release();
    event BlacklistAdd(address indexed addr);
    event BlacklistRemove(address indexed addr);

    /**
     * Do not transfer tokens until the crowdsale is over.
     *
     */
    modifier canTransfer() {
        require(released || msg.sender == owner);
        _;
    }

    /*
     * modifier which gives specific rights to serviceAgent
     */
    modifier onlyServiceAgent(){
        require(msg.sender == serviceAgent);
        _;
    }


    function LuckchemyToken() public {

        totalSupply_ = 1000000000 * (10 ** uint256(decimals));
        CROWDSALE_SUPPLY = 700000000 * (10 ** uint256(decimals));
        OWNERS_AND_PARTNERS_SUPPLY = 300000000 * (10 ** uint256(decimals));

        addAddressToUniqueMap(msg.sender);
        addAddressToUniqueMap(OWNERS_AND_PARTNERS_ADDRESS);

        balances[msg.sender] = CROWDSALE_SUPPLY;

        balances[OWNERS_AND_PARTNERS_ADDRESS] = OWNERS_AND_PARTNERS_SUPPLY;

        owner = msg.sender;

        Transfer(0x0, msg.sender, CROWDSALE_SUPPLY);

        Transfer(0x0, OWNERS_AND_PARTNERS_ADDRESS, OWNERS_AND_PARTNERS_SUPPLY);
    }

    function transfer(address _to, uint256 _value) public canTransfer returns (bool success) {
        //Add address to map of unique token owners
        addAddressToUniqueMap(_to);

        // Call StandardToken.transfer()
        return super.transfer(_to, _value);
    }

    function transferFrom(address _from, address _to, uint256 _value) public canTransfer returns (bool success) {
        //Add address to map of unique token owners
        addAddressToUniqueMap(_to);

        // Call StandardToken.transferForm()
        return super.transferFrom(_from, _to, _value);
    }

    /**
    *
    * Release the tokens to the public.
    * Can be called only by owner which should be the Crowdsale contract
    * Should be called if the crowdale is successfully finished
    *
    */
    function releaseTokenTransfer() public onlyOwner {
        released = true;
        Release();
    }

    /**
     * Add address to the black list.
     * Only service agent can do this
     */
    function addBlacklistItem(address _blackAddr) public onlyServiceAgent {
        blacklist[_blackAddr] = true;

        BlacklistAdd(_blackAddr);
    }

    /**
    * Remove address from the black list.
    * Only service agent can do this
    */
    function removeBlacklistItem(address _blackAddr) public onlyServiceAgent {
        delete blacklist[_blackAddr];
    }

    /**
    * Add address to unique map if it is not added
    */
    function addAddressToUniqueMap(address _addr) private returns (bool) {
        if (addressAvailabilityMap[_addr] == true) {
            return true;
        }

        addressAvailabilityMap[_addr] = true;
        addressMap[addressCount++] = _addr;

        return true;
    }

    /**
    * Get address by index from map of unique addresses
    */
    function getUniqueAddressByIndex(uint256 _addressIndex) public view returns (address) {
        return addressMap[_addressIndex];
    }

    /**
    * Change service agent
    */
    function changeServiceAgent(address _addr) public onlyOwner {
        serviceAgent = _addr;
    }

}