// Vulnerability label: ARTHM
pragma solidity ^0.4.13;

contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) public constant 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;
  /**
  * @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));

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

}

contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) public constant 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.
   */
  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 public {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

library SafeERC20 {
  function safeTransfer(ERC20Basic token, address to, uint256 value) internal {
    assert(token.transfer(to, value));
  }

  function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal {
    assert(token.transferFrom(from, to, value));
  }

  function safeApprove(ERC20 token, address spender, uint256 value) internal {
    assert(token.approve(spender, value));
  }
}

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;
  }
}

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));

    uint256 _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[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = _allowance.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 constant returns (uint256 remaining) {
    return allowed[_owner][_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
   */
  function increaseApproval (address _spender, uint _addedValue) public returns (bool success) {
    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  function decreaseApproval (address _spender, uint _subtractedValue) public returns (bool success) {
    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 StandardToken {

    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 > 0);
        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);
    }
}

contract Peculium is BurnableToken,Ownable { // Our token is a standard ERC20 Token with burnable and ownable aptitude

	/*Variables about the old token contract */	
	PeculiumOld public peculOld; // The old Peculium token
	address public peculOldAdress = 0x53148Bb4551707edF51a1e8d7A93698d18931225; // The address of the old Peculium contract

	using SafeMath for uint256; // We use safemath to do basic math operation (+,-,*,/)
	using SafeERC20 for ERC20Basic; 

    	/* Public variables of the token for ERC20 compliance */
	string public name = "Peculium"; //token name 
    	string public symbol = "PCL"; // token symbol
    	uint256 public decimals = 8; // token number of decimal
    	
    	/* Public variables specific for Peculium */
        uint256 public constant MAX_SUPPLY_NBTOKEN   = 20000000000*10**8; // The max cap is 20 Billion Peculium

	mapping(address => bool) public balancesCannotSell; // The boolean variable, to frost the tokens


    	/* Event for the freeze of account */
	event ChangedTokens(address changedTarget,uint256 amountToChanged);
	event FrozenFunds(address address_target, bool bool_canSell);

   
	//Constructor
	function Peculium() public {
		totalSupply = MAX_SUPPLY_NBTOKEN;
		balances[address(this)] = totalSupply; // At the beginning, the contract has all the tokens. 
		peculOld = PeculiumOld(peculOldAdress);	
	}
	
	/*** Public Functions of the contract ***/	
				
	function transfer(address _to, uint256 _value) public returns (bool) 
	{ // We overright the transfer function to allow freeze possibility
	
		require(balancesCannotSell[msg.sender]==false);
		return BasicToken.transfer(_to,_value);
	
	}
	
	function transferFrom(address _from, address _to, uint256 _value) public returns (bool) 
	{ // We overright the transferFrom function to allow freeze possibility
	
		require(balancesCannotSell[msg.sender]==false);	
		return StandardToken.transferFrom(_from,_to,_value);
	
	}

	/***  Owner Functions of the contract ***/	

   	function ChangeLicense(address target, bool canSell) public onlyOwner
   	{
        
        	balancesCannotSell[target] = canSell;
        	FrozenFunds(target, canSell);
    	
    	}
    	
    		function UpgradeTokens() public
	{
	// Use this function to swap your old peculium against new ones (the new ones don't need defrost to be transfered)
	// Old peculium are burned
		require(peculOld.totalSupply()>0);
		uint256 amountChanged = peculOld.allowance(msg.sender,address(this));
		require(amountChanged>0);
		peculOld.transferFrom(msg.sender,address(this),amountChanged);
		peculOld.burn(amountChanged);

		balances[address(this)] = balances[address(this)].sub(amountChanged);
    		balances[msg.sender] = balances[msg.sender].add(amountChanged);
		Transfer(address(this), msg.sender, amountChanged);
		ChangedTokens(msg.sender,amountChanged);
		
	}

	/*** Others Functions of the contract ***/	
	
	/* Approves and then calls the receiving contract */
	function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
		allowed[msg.sender][_spender] = _value;
		Approval(msg.sender, _spender, _value);

		require(_spender.call(bytes4(bytes32(keccak256("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData));
        	return true;
    }

  	function getBlockTimestamp() public constant returns (uint256)
  	{
        	return now;
  	}

  	function getOwnerInfos() public constant returns (address ownerAddr, uint256 ownerBalance)  
  	{ // Return info about the public address and balance of the account of the owner of the contract
    	
    		ownerAddr = owner;
		ownerBalance = balanceOf(ownerAddr);
  	
  	}

}

contract PeculiumOld is BurnableToken,Ownable { // Our token is a standard ERC20 Token with burnable and ownable aptitude

	using SafeMath for uint256; // We use safemath to do basic math operation (+,-,*,/)
	using SafeERC20 for ERC20Basic; 

    	/* Public variables of the token for ERC20 compliance */
	string public name = "Peculium"; //token name 
    	string public symbol = "PCL"; // token symbol
    	uint256 public decimals = 8; // token number of decimal
    	
    	/* Public variables specific for Peculium */
        uint256 public constant MAX_SUPPLY_NBTOKEN   = 20000000000*10**8; // The max cap is 20 Billion Peculium

	uint256 public dateStartContract; // The date of the deployment of the token
	mapping(address => bool) public balancesCanSell; // The boolean variable, to frost the tokens
	uint256 public dateDefrost; // The date when the owners of token can defrost their tokens


    	/* Event for the freeze of account */
 	event FrozenFunds(address target, bool frozen);     	 
     	event Defroze(address msgAdd, bool freeze);
	


   
	//Constructor
	function PeculiumOld() {
		totalSupply = MAX_SUPPLY_NBTOKEN;
		balances[owner] = totalSupply; // At the beginning, the owner has all the tokens. 
		balancesCanSell[owner] = true; // The owner need to sell token for the private sale and for the preICO, ICO.
		
		dateStartContract=now;
		dateDefrost = dateStartContract + 85 days; // everybody can defrost his own token after the 25 january 2018 (85 days after 1 November)

	}

	/*** Public Functions of the contract ***/	
	
	function defrostToken() public 
	{ // Function to defrost your own token, after the date of the defrost
	
		require(now>dateDefrost);
		balancesCanSell[msg.sender]=true;
		Defroze(msg.sender,true);
	}
				
	function transfer(address _to, uint256 _value) public returns (bool) 
	{ // We overright the transfer function to allow freeze possibility
	
		require(balancesCanSell[msg.sender]);
		return BasicToken.transfer(_to,_value);
	
	}
	
	function transferFrom(address _from, address _to, uint256 _value) public returns (bool) 
	{ // We overright the transferFrom function to allow freeze possibility (need to allow before)
	
		require(balancesCanSell[msg.sender]);	
		return StandardToken.transferFrom(_from,_to,_value);
	
	}

	/***  Owner Functions of the contract ***/	

   	function freezeAccount(address target, bool canSell) onlyOwner 
   	{
        
        	balancesCanSell[target] = canSell;
        	FrozenFunds(target, canSell);
    	
    	}


	/*** Others Functions of the contract ***/	
	
	/* Approves and then calls the receiving contract */
	function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
		allowed[msg.sender][_spender] = _value;
		Approval(msg.sender, _spender, _value);

		require(_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData));
        	return true;
    }

  	function getBlockTimestamp() constant returns (uint256)
  	{
        
        	return now;
  	
  	}

  	function getOwnerInfos() constant returns (address ownerAddr, uint256 ownerBalance)  
  	{ // Return info about the public address and balance of the account of the owner of the contract
    	
    		ownerAddr = owner;
		ownerBalance = balanceOf(ownerAddr);
  	
  	}

}