pragma solidity ^0.4.18;


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20 {

    function totalSupply() public constant returns (uint);
	function balanceOf(address who) public view returns (uint256);
	function transfer(address to, uint256 value) public returns (bool);
	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);
	event Transfer(address indexed from, address indexed to, uint256 value);

}




/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20 {

  using SafeMath for uint256;

    uint256 public totalSupply = 10*10**26;
    uint8 constant public decimals = 18;
    string constant public name = "CLBToken";
    string constant public symbol = "CLB";

	mapping(address => uint256) balances;
	mapping (address => mapping (address => uint256)) internal allowed;

	/**
	* @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);
		emit Transfer(msg.sender, _to, _value);
		return true;
	}


		/**
		 * @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 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];
	}


   function totalSupply() public constant returns (uint256){
        return totalSupply;
   }


	/**
	 * @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;
	}

}



/**
 * @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.
	 */
	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));
		emit OwnershipTransferred(owner, newOwner);
		owner = newOwner;
	}

}

contract Controlled is Ownable{

    function Controlled() public {
       setExclude(msg.sender);
    }

    // Flag that determines if the token is transferable or not.
    bool public transferEnabled = false;

    // flag that makes locked address effect
    bool public lockFlag=true;
    mapping(address => bool) locked;
    mapping(address => bool) exclude;

    function enableTransfer(bool _enable) public onlyOwner{
        transferEnabled=_enable;
    }

    function disableLock(bool _enable) public onlyOwner returns (bool success){
        lockFlag=_enable;
        return true;
    }

    function addLock(address _addr) public onlyOwner returns (bool success){
        require(_addr!=msg.sender);
        locked[_addr]=true;
        return true;
    }

    function setExclude(address _addr) public onlyOwner returns (bool success){
        exclude[_addr]=true;
        return true;
    }

    function removeLock(address _addr) public onlyOwner returns (bool success){
        locked[_addr]=false;
        return true;
    }

    modifier transferAllowed(address _addr) {
        if (!exclude[_addr]) {
            assert(transferEnabled);
            if(lockFlag){
                assert(!locked[_addr]);
            }
        }
        
        _;
    }

}
 

/**
 * @title Burnable Token
 * @dev Token that can be irreversibly burned (destroyed).
 */
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);
		emit Burn(burner, _value);
	}
}

/**
 * @title Pausable token
 *
 * @dev StandardToken modified with pausable transfers.
 **/

contract ControlledToken is BasicToken, Controlled {

  function transfer(address _to, uint256 _value) public transferAllowed(msg.sender) returns (bool) {
    return super.transfer(_to, _value);
  }

  function transferFrom(address _from, address _to, uint256 _value) public transferAllowed(msg.sender) returns (bool) {
    return super.transferFrom(_from, _to, _value);
  }

  function approve(address _spender, uint256 _value) public transferAllowed(msg.sender) returns (bool) {
    return super.approve(_spender, _value);
  }

  function increaseApproval(address _spender, uint _addedValue) public transferAllowed(msg.sender) returns (bool success) {
    return super.increaseApproval(_spender, _addedValue);
  }

  function decreaseApproval(address _spender, uint _subtractedValue) public transferAllowed(msg.sender) returns (bool success) {
    return super.decreaseApproval(_spender, _subtractedValue);
  }
}


contract CLBToken is ControlledToken, BurnableToken {



	function CLBToken()	public {
        balances[msg.sender] = totalSupply;
        emit Transfer(address(0), msg.sender, totalSupply);
	}

	event LogRedeem(address beneficiary, uint256 amount);

	function redeem() public {

		uint256 balance = balanceOf(msg.sender);
		// burn the tokens in this token smart contract
		super.burn(balance);
 		emit LogRedeem(msg.sender, balance);
	}


}


/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {
	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;
	}

	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;
	}

	function sub(uint256 a, uint256 b) internal pure returns (uint256) {
		assert(b <= a);
		return a - b;
	}

	function add(uint256 a, uint256 b) internal pure returns (uint256) {
		uint256 c = a + b;
		assert(c >= a);
		return c;
	}
}