pragma solidity ^0.4.18;






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);
}


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));
  }
}


contract ERC827 is ERC20 {

  function approve( address _spender, uint256 _value, bytes _data ) public returns (bool);
  function transfer( address _to, uint256 _value, bytes _data ) public returns (bool);
  function transferFrom( address _from, address _to, uint256 _value, bytes _data ) public returns (bool);

}


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) {
    
    uint256 c = a / b;
    
    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;
  }
}


contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  uint256 totalSupply_;

  
  function totalSupply() public view returns (uint256) {
    return totalSupply_;
  }

  
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[msg.sender]);

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

  
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    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);
    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);
    }
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}


contract ERC827Token is ERC827, StandardToken {

  
  function approve(address _spender, uint256 _value, bytes _data) public returns (bool) {
    require(_spender != address(this));

    super.approve(_spender, _value);

    require(_spender.call(_data));

    return true;
  }

  
  function transfer(address _to, uint256 _value, bytes _data) public returns (bool) {
    require(_to != address(this));

    super.transfer(_to, _value);

    require(_to.call(_data));
    return true;
  }

  
  function transferFrom(address _from, address _to, uint256 _value, bytes _data) public returns (bool) {
    require(_to != address(this));

    super.transferFrom(_from, _to, _value);

    require(_to.call(_data));
    return true;
  }

  
  function increaseApproval(address _spender, uint _addedValue, bytes _data) public returns (bool) {
    require(_spender != address(this));

    super.increaseApproval(_spender, _addedValue);

    require(_spender.call(_data));

    return true;
  }

  
  function decreaseApproval(address _spender, uint _subtractedValue, bytes _data) public returns (bool) {
    require(_spender != address(this));

    super.decreaseApproval(_spender, _subtractedValue);

    require(_spender.call(_data));

    return true;
  }

}


contract Ownable {
  address public owner;


  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


  
  function Ownable() public {
    owner = msg.sender;
  }


  
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }


  
  function transferOwnership(address newOwner) public onlyOwner {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}


contract MintableToken is StandardToken, Ownable {
  event Mint(address indexed to, uint256 amount);
  event MintFinished();

  bool public mintingFinished = false;


  modifier canMint() {
    require(!mintingFinished);
    _;
  }

  
  function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
    totalSupply_ = totalSupply_.add(_amount);
    balances[_to] = balances[_to].add(_amount);
    Mint(_to, _amount);
    Transfer(address(0), _to, _amount);
    return true;
  }

  
  function finishMinting() onlyOwner canMint public returns (bool) {
    mintingFinished = true;
    MintFinished();
    return true;
  }
}


contract Destructible is Ownable {

  function Destructible() public payable { }

  
  function destroy() onlyOwner public {
    selfdestruct(owner);
  }

  function destroyAndSend(address _recipient) onlyOwner public {
    selfdestruct(_recipient);
  }
}


contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  
  modifier whenPaused() {
    require(paused);
    _;
  }

  
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    Pause();
  }

  
  function unpause() onlyOwner whenPaused public {
    paused = false;
    Unpause();
  }
}


contract HasNoEther is Ownable {

  
  function HasNoEther() public payable {
    require(msg.value == 0);
  }

  
  function() external {
  }

  
  function reclaimEther() external onlyOwner {
    assert(owner.send(this.balance));
  }
}


contract HasNoContracts is Ownable {

  
  function reclaimContract(address contractAddr) external onlyOwner {
    Ownable contractInst = Ownable(contractAddr);
    contractInst.transferOwnership(owner);
  }
}


contract CanReclaimToken is Ownable {
  using SafeERC20 for ERC20Basic;

  
  function reclaimToken(ERC20Basic token) external onlyOwner {
    uint256 balance = token.balanceOf(this);
    token.safeTransfer(owner, balance);
  }

}



contract HasNoTokens is CanReclaimToken {

 
  function tokenFallback(address from_, uint256 value_, bytes data_) pure external {
    from_;
    value_;
    data_;
    revert();
  }

}


contract NoOwner is HasNoEther, HasNoTokens, HasNoContracts {
}


contract TokenVesting is Ownable {
  using SafeMath for uint256;
  using SafeERC20 for ERC20Basic;

  event Released(uint256 amount);
  event Revoked();

  
  address public beneficiary;

  uint256 public cliff;
  uint256 public start;
  uint256 public duration;

  bool public revocable;

  mapping (address => uint256) public released;
  mapping (address => bool) public revoked;

  
  function TokenVesting(address _beneficiary, uint256 _start, uint256 _cliff, uint256 _duration, bool _revocable) public {
    require(_beneficiary != address(0));
    require(_cliff <= _duration);

    beneficiary = _beneficiary;
    revocable = _revocable;
    duration = _duration;
    cliff = _start.add(_cliff);
    start = _start;
  }

  
  function release(ERC20Basic token) public {
    uint256 unreleased = releasableAmount(token);

    require(unreleased > 0);

    released[token] = released[token].add(unreleased);

    token.safeTransfer(beneficiary, unreleased);

    Released(unreleased);
  }

  
  function revoke(ERC20Basic token) public onlyOwner {
    require(revocable);
    require(!revoked[token]);

    uint256 balance = token.balanceOf(this);

    uint256 unreleased = releasableAmount(token);
    uint256 refund = balance.sub(unreleased);

    revoked[token] = true;

    token.safeTransfer(owner, refund);

    Revoked();
  }

  
  function releasableAmount(ERC20Basic token) public view returns (uint256) {
    return vestedAmount(token).sub(released[token]);
  }

  
  function vestedAmount(ERC20Basic token) public view returns (uint256) {
    uint256 currentBalance = token.balanceOf(this);
    uint256 totalBalance = currentBalance.add(released[token]);

    if (now < cliff) {
      return 0;
    } else if (now >= start.add(duration) || revoked[token]) {
      return totalBalance;
    } else {
      return totalBalance.mul(now.sub(start)).div(duration);
    }
  }
}




contract BurnableToken is BasicToken {

    event Burn(address indexed burner, uint256 value);

    
    function burn(uint256 _value) public returns (bool) {
        require(_value <= balances[msg.sender]);
        
        

        address burner = msg.sender;
        balances[burner] = balances[burner].sub(_value);
        totalSupply_ = totalSupply_.sub(_value);
        Burn(burner, _value);
        Transfer(burner, address(0), _value);
        return true;
    }
}


contract BOBTokenVesting is TokenVesting, HasNoEther, HasNoContracts, Destructible {

    
    function BOBTokenVesting(address _beneficiary, uint256 _start, uint256 _cliff, uint256 _duration, bool _revocable) 
                TokenVesting(        _beneficiary,         _start,         _cliff,         _duration,      _revocable) public {}

}



contract PausableERC827Token is ERC827Token, Pausable {

    
    function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
        return super.transfer(_to, _value);
    }
    function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
        return super.transferFrom(_from, _to, _value);
    }
    function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
        return super.approve(_spender, _value);
    }

    function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
        return super.increaseApproval(_spender, _addedValue);
    }
    function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
        return super.decreaseApproval(_spender, _subtractedValue);
    }

    
    function transfer(address _to, uint256 _value, bytes _data) public whenNotPaused returns (bool) {
        return super.transfer(_to, _value, _data);
    }
    function transferFrom(address _from, address _to, uint256 _value, bytes _data) public whenNotPaused returns (bool) {
        return super.transferFrom(_from, _to, _value, _data);
    }
    function approve(address _spender, uint256 _value, bytes _data) public whenNotPaused returns (bool) {
        return super.approve(_spender, _value, _data);
    }
    function increaseApproval(address _spender, uint _addedValue, bytes _data) public whenNotPaused returns (bool success) {
        return super.increaseApproval(_spender, _addedValue, _data);
    }
    function decreaseApproval(address _spender, uint _subtractedValue, bytes _data) public whenNotPaused returns (bool success) {
        return super.decreaseApproval(_spender, _subtractedValue, _data);
    }
}




contract AirdropToken is PausableERC827Token {
    using SafeMath for uint256;
    uint8 private constant PERCENT_DIVIDER = 100;  

    event AirdropStart(uint256 multiplierPercent, uint256 airdropNumber);
    event AirdropComplete(uint256 airdropNumber);

    uint256 public multiplierPercent = 0;               
    uint256 public currentAirdrop = 0;                  
    uint256 public undropped;                           
    mapping(address => uint256) public airdropped;        

    
    function startAirdrop(uint256 _multiplierPercent) onlyOwner external returns(bool){
        pause();
        require(multiplierPercent == 0);                 
        require(_multiplierPercent > PERCENT_DIVIDER);   
        currentAirdrop = currentAirdrop.add(1);
        multiplierPercent = _multiplierPercent;
        undropped = totalSupply();
        assert(multiplierPercent.mul(undropped) > 0);   
        AirdropStart(multiplierPercent, currentAirdrop);
    }
    
    function finishAirdrop() external returns(bool){
        require(undropped == 0);
        multiplierPercent = 0;
        AirdropComplete(currentAirdrop);
        unpause();
    }

    
    function drop(address[] holders) external returns(bool){
        for(uint256 i=0; i < holders.length; i++){
            address holder = holders[i];
            if(!isAirdropped(holder)){
                uint256 balance = balances[holder];
                undropped = undropped.sub(balance);
                balances[holder] = airdropAmount(balance);
                uint256 amount = balances[holder].sub(balance);
                totalSupply_ = totalSupply_.add(amount);
                Transfer(address(0), holder, amount);
                setAirdropped(holder);
            }
        }
    }
    
    function airdropAmount(uint256 amount) view public returns(uint256){
        require(multiplierPercent > 0);
        return multiplierPercent.mul(amount).div(PERCENT_DIVIDER);
    }

    
    function isAirdropped(address holder) view internal returns(bool){
        return (airdropped[holder] == currentAirdrop);
    }
    
    function setAirdropped(address holder) internal {
        airdropped[holder] = currentAirdrop;
    }
}

contract BOBToken is AirdropToken, MintableToken, BurnableToken, NoOwner {
    string public symbol = 'BOB';
    string public name = 'BOB Token';
    uint8 public constant decimals = 18;

    address founder;                
    bool public transferEnabled;    

    function setFounder(address _founder) onlyOwner public {
        founder = _founder;
    }
    function setTransferEnabled(bool enable) onlyOwner public {
        transferEnabled = enable;
    }

    
    modifier canTransfer() {
        require( transferEnabled || msg.sender == founder || msg.sender == owner);
        _;
    }
    
    function transfer(address _to, uint256 _value) canTransfer public returns (bool) {
        return super.transfer(_to, _value);
    }

    function transferFrom(address _from, address _to, uint256 _value) canTransfer public returns (bool) {
        return super.transferFrom(_from, _to, _value);
    }

    function transfer(address _to, uint256 _value, bytes _data) canTransfer public returns (bool) {
        return super.transfer(_to, _value, _data);
    }

    function transferFrom(address _from, address _to, uint256 _value, bytes _data) canTransfer public returns (bool) {
        return super.transferFrom(_from, _to, _value, _data);
    }
}