// Vulnerability label: clean
pragma solidity ^0.4.11;


/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {
  function mul(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal constant 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;
  }

  function sub(uint256 a, uint256 b) internal constant returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal constant 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;


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() {
    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) onlyOwner {
    if (newOwner != address(0)) {
      owner = newOwner;
    }
  }

}


/*
 * Haltable
 *
 * Abstract contract that allows children to implement an
 * emergency stop mechanism. Differs from Pausable by requiring a state.
 *
 *
 * Originally envisioned in FirstBlood ICO contract.
 */
 contract Haltable is Ownable {
   bool public halted;

   modifier inNormalState {
     assert(!halted);
     _;
   }

   modifier inEmergencyState {
     assert(halted);
     _;
   }

   // called by the owner on emergency, triggers stopped state
   function halt() external onlyOwner inNormalState {
     halted = true;
   }

   // called by the owner on end of emergency, returns to normal state
   function unhalt() external onlyOwner inEmergencyState {
     halted = false;
   }

 }
/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) constant returns (uint256);
  function transfer(address to, uint256 value) 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) constant returns (uint256);
  function transferFrom(address from, address to, uint256 value) returns (bool);
  function approve(address spender, uint256 value) returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  /**
  * @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) returns (bool) {
    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) constant returns (uint256 balance) {
    return balances[_owner];
  }

}

/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * @dev https://github.com/ethereum/EIPs/issues/20
 * @dev 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)) 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 amout of tokens to be transfered
   */
  function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
    var _allowance = allowed[_from][msg.sender];

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
    // require (_value <= _allowance);

    balances[_to] = balances[_to].add(_value);
    balances[_from] = balances[_from].sub(_value);
    allowed[_from][msg.sender] = _allowance.sub(_value);
    Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) returns (bool) {

    // To change the approve amount you first have to reduce the addresses`
    //  allowance to zero by calling `approve(_spender, 0)` if it is not
    //  already 0 to mitigate the race condition described here:
    //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
    require((_value == 0) || (allowed[msg.sender][_spender] == 0));

    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 specifing the amount of tokens still avaible for the spender.
   */
  function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
    return allowed[_owner][_spender];
  }

}

/**
 * @title Burnable
 *
 * @dev Standard ERC20 token
 */
contract Burnable is StandardToken {
  using SafeMath for uint;

  /* This notifies clients about the amount burnt */
  event Burn(address indexed from, uint256 value);

  function burn(uint256 _value) returns (bool success) {
    require(balances[msg.sender] >= _value);                // Check if the sender has enough
    balances[msg.sender] = balances[msg.sender].sub(_value);// Subtract from the sender
    totalSupply = totalSupply.sub(_value);                                  // Updates totalSupply
    Burn(msg.sender, _value);
    return true;
  }

  function burnFrom(address _from, uint256 _value) returns (bool success) {
    require(balances[_from] >= _value);               // Check if the sender has enough
    require(_value <= allowed[_from][msg.sender]);    // Check allowance
    balances[_from] = balances[_from].sub(_value);    // Subtract from the sender
    totalSupply = totalSupply.sub(_value);            // Updates totalSupply
    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
    Burn(_from, _value);
    return true;
  }

  function transfer(address _to, uint _value) returns (bool success) {
    require(_to != 0x0); //use burn

    return super.transfer(_to, _value);
  }

  function transferFrom(address _from, address _to, uint _value) returns (bool success) {
    require(_to != 0x0); //use burn

    return super.transferFrom(_from, _to, _value);
  }
}

/**
 * @title JincorToken
 *
 * @dev Burnable Ownable ERC20 token
 */
 contract JincorToken is Burnable, Ownable {

   string public name = "Jincor Token";
   string public symbol = "JCR";
   uint256 public decimals = 18;
   uint256 public INITIAL_SUPPLY = 35000000 * 1 ether;

   /* The finalizer contract that allows unlift the transfer limits on this token */
   address public releaseAgent;

   /** A crowdsale contract can release us to the wild if ICO success. If false we are are in transfer lock up period.*/
   bool public released = false;

   /** Map of agents that are allowed to transfer tokens regardless of the lock down period. These are crowdsale contracts and possible the team multisig itself. */
   mapping (address => bool) public transferAgents;

   /**
    * Limit token transfer until the crowdsale is over.
    *
    */
   modifier canTransfer(address _sender) {
     require(transferAgents[_sender] || released);
     _;
   }

   /** The function can be called only before or after the tokens have been releasesd */
   modifier inReleaseState(bool releaseState) {
     require(releaseState == released);
     _;
   }

   /** The function can be called only by a whitelisted release agent. */
   modifier onlyReleaseAgent() {
     require(msg.sender == releaseAgent);
     _;
   }


   /**
    * @dev Contructor that gives msg.sender all of existing tokens.
    */
   function JincorToken() {
     totalSupply = INITIAL_SUPPLY;
     balances[msg.sender] = INITIAL_SUPPLY;
   }


   /**
    * Set the contract that can call release and make the token transferable.
    *
    * Design choice. Allow reset the release agent to fix fat finger mistakes.
    */
   function setReleaseAgent(address addr) onlyOwner inReleaseState(false) public {

     // We don't do interface check here as we might want to a normal wallet address to act as a release agent
     releaseAgent = addr;
   }

   function release() onlyReleaseAgent inReleaseState(false) public {
     released = true;
   }

   /**
    * Owner can allow a particular address (a crowdsale contract) to transfer tokens despite the lock up period.
    */
   function setTransferAgent(address addr, bool state) onlyOwner inReleaseState(false) public {
     transferAgents[addr] = state;
   }

   function transfer(address _to, uint _value) canTransfer(msg.sender) returns (bool success) {
     // Call Burnable.transfer()
     return super.transfer(_to, _value);
   }

   function transferFrom(address _from, address _to, uint _value) canTransfer(_from) returns (bool success) {
     // Call Burnable.transferForm()
     return super.transferFrom(_from, _to, _value);
   }

   function burn(uint256 _value) onlyOwner returns (bool success) {
     return super.burn(_value);
   }

   function burnFrom(address _from, uint256 _value) onlyOwner returns (bool success) {
     return super.burnFrom(_from, _value);
   }
 }



contract JincorTokenPreSale is Ownable, Haltable {
  using SafeMath for uint;

  string public name = "Jincor Token PreSale";

  JincorToken public token;

  address public beneficiary;

  uint public hardCap;

  uint public softCap;

  uint public price;

  uint public purchaseLimit;

  uint public collected = 0;

  uint public tokensSold = 0;

  uint public investorCount = 0;

  uint public weiRefunded = 0;

  uint public startBlock;

  uint public endBlock;

  bool public softCapReached = false;

  bool public crowdsaleFinished = false;

  mapping (address => bool) refunded;

  event GoalReached(uint amountRaised);

  event SoftCapReached(uint softCap);

  event NewContribution(address indexed holder, uint256 tokenAmount, uint256 etherAmount);

  event Refunded(address indexed holder, uint256 amount);

  modifier preSaleActive() {
    require(block.number >= startBlock && block.number < endBlock);
    _;
  }

  modifier preSaleEnded() {
    require(block.number >= endBlock);
    _;
  }

  function JincorTokenPreSale(
  uint _hardCapUSD,
  uint _softCapUSD,
  address _token,
  address _beneficiary,
  uint _totalTokens,
  uint _priceETH,
  uint _purchaseLimitUSD,

  uint _startBlock,
  uint _endBlock
  ) {
    hardCap = _hardCapUSD.mul(1 ether).div(_priceETH);
    softCap = _softCapUSD.mul(1 ether).div(_priceETH);
    price = _totalTokens.mul(1 ether).div(hardCap);

    purchaseLimit = _purchaseLimitUSD.mul(1 ether).div(_priceETH).mul(price);
    token = JincorToken(_token);
    beneficiary = _beneficiary;

    startBlock = _startBlock;
    endBlock = _endBlock;
  }

  function() payable {
    require(msg.value >= 0.1 * 1 ether);
    doPurchase(msg.sender);
  }

  function refund() external preSaleEnded inNormalState {
    require(softCapReached == false);
    require(refunded[msg.sender] == false);

    uint balance = token.balanceOf(msg.sender);
    require(balance > 0);

    uint refund = balance.div(price);
    if (refund > this.balance) {
      refund = this.balance;
    }

    assert(msg.sender.send(refund));
    refunded[msg.sender] = true;
    weiRefunded = weiRefunded.add(refund);
    Refunded(msg.sender, refund);
  }

  function withdraw() onlyOwner {
    require(softCapReached);
    assert(beneficiary.send(collected));
    token.transfer(beneficiary, token.balanceOf(this));
    crowdsaleFinished = true;
  }

  function doPurchase(address _owner) private preSaleActive inNormalState {

    require(!crowdsaleFinished);
    require(collected.add(msg.value) <= hardCap);

    if (!softCapReached && collected < softCap && collected.add(msg.value) >= softCap) {
      softCapReached = true;
      SoftCapReached(softCap);
    }
    uint tokens = msg.value * price;
    require(token.balanceOf(msg.sender).add(tokens) <= purchaseLimit);

    if (token.balanceOf(msg.sender) == 0) investorCount++;

    collected = collected.add(msg.value);

    token.transfer(msg.sender, tokens);

    tokensSold = tokensSold.add(tokens);

    NewContribution(_owner, tokens, msg.value);

    if (collected == hardCap) {
      GoalReached(hardCap);
    }
  }
}