// Vulnerability label: clean
// v7

/**
 * Token.sol
 */

pragma solidity ^0.4.23;

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

  /**
   * @dev Multiplies two numbers, throws on overflow.
   * @param a First number
   * @param b Second number
   */
  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.
   * @param a First number
   * @param b Second number
   */
  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).
   * @param a First number
   * @param b Second number
   */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  /**
   * @dev Adds two numbers, throws on overflow.
   * @param a First number
   * @param b Second number
   */
  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

/**
 * @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 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 ERC20Basic {
  uint256 public totalSupply;
  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 {
  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;

  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);
    emit Transfer(msg.sender, _to, _value);
    return true;
  }

  function balanceOf(address _owner) public view returns (uint256 balance) {
    return balances[_owner];
  }
}

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, 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;
  }

  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;
  }
}

/**
 * @title TokenContract
 * @dev Main Token Contract which is Ownable, Standard ERC20 token
 */
contract TokenContract is Ownable, StandardToken {
  string public constant name = "ExtraToken";
  string public constant symbol = "ELT";
  uint8 public constant decimals = 18;
  uint256 public constant INITIAL_SUPPLY = 30000000 * (10 ** uint256(decimals));

  /**
   * @dev Constructor of TokenContract
   */
  constructor() public {
    
    address presaleAddress = 0xEA674F79ACF3C974085784f0B3E9549B39A5E10a;
    address crowdSaleAddress = 0xE71B9432B01d692008843Ca1727b957635B253Df;
    address affiliatesAddress = 0xFD534c1Fd8f9F230deA015B31B77679a8475052A;
    address advisorAddress = 0x775b67b563DD0407fd4b17a46737bB09cc9Aeb6D;
    address bountyAddress = 0x6Bbbf95F3EEA93A2BFD42b3C2A42d616980e146E;
    address airdropAddress = 0xc2ca8b7a7788da1799ba786174Abd17611Cf9B03;
    address extraLoversAddress = 0xE517012CBDcCa3d86216019B4158f0C89827e586;
    totalSupply = INITIAL_SUPPLY;
    balances[msg.sender] = 600000 * (10 ** uint256(decimals));  // transferred to the owner (2%)
    emit Transfer(0x0, msg.sender, 600000 * (10 ** uint256(decimals)));

    balances[presaleAddress] = 4500000 * (10 ** uint256(decimals));  // transfer to presale contract
    emit Transfer(0x0, presaleAddress, 4500000 * (10 ** uint256(decimals)));

    balances[crowdSaleAddress] = 15000000 * (10 ** uint256(decimals)); // transfer to crowdsale contract
    emit Transfer(0x0, presaleAddress, 15000000 * (10 ** uint256(decimals)));

    balances[affiliatesAddress] = 3600000 * (10 ** uint256(decimals)); // transfer to affiliates contract
    emit Transfer(0x0, affiliatesAddress, 3600000 * (10 ** uint256(decimals)));

    balances[advisorAddress] = 2700000 * (10 ** uint256(decimals)); // transfer to advisors wallet (9%)
    emit Transfer(0x0, advisorAddress, 2700000 * (10 ** uint256(decimals)));

    balances[bountyAddress] = 900000 * (10 ** uint256(decimals)); // transfer to bounty wallet
    emit Transfer(0x0, bountyAddress, 900000 * (10 ** uint256(decimals)));

    balances[airdropAddress] = 900000 * (10 ** uint256(decimals)); // transfer to airdrop wallet / contract
    emit Transfer(0x0, airdropAddress, 900000 * (10 ** uint256(decimals)));

    balances[extraLoversAddress] = 1800000 * (10 ** uint256(decimals)); // transfer to valult contract
    emit Transfer(0x0, extraLoversAddress, 1800000 * (10 ** uint256(decimals)));
  }

  /**
   * @dev Transfer funds
   * @param _to To whom address
   * @param _value Amount of tokens
   */
  function transfer(address _to, uint256 _value) public returns (bool) {
    return super.transfer(_to, _value);
  }

  /**
   * @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) {
    return super.transferFrom(_from, _to, _value);
  }

  /**
   * @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) {
    return super.approve(_spender, _value);
  }

  /**
   * @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 success) {
    return super.increaseApproval(_spender, _addedValue);
  }

  /**
   * @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 success) {
    return super.decreaseApproval(_spender, _subtractedValue);
  }
}