// Vulnerability label: clean
pragma solidity ^0.4.19;

interface ERC20Interface {
  function totalSupply() public view returns (uint256);
  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 Transfer(address indexed from, address indexed to, uint256 value);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

interface ERC223Interface {
    function transfer(address to, uint value, bytes data) public;
    event Transfer(address indexed from, address indexed to, uint value, bytes indexed data);
}

contract ERC223ReceivingContract { 
    function tokenFallback(address _from, uint _value, bytes _data) public;
}

contract Owned {
    address public owner;
    address public newOwner;

    event OwnershipTransferred(address indexed _from, address indexed _to);

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

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

    function transferOwnership(address _newOwner) public onlyOwner {
        newOwner = _newOwner;
    }
    
    function acceptOwnership() public {
        require(msg.sender == newOwner);
        OwnershipTransferred(owner, newOwner);
        owner = newOwner;
        newOwner = address(0);
    }
}

contract Authored is Owned, ERC20Interface, ERC223Interface {
  using SafeMath for uint;
     
    string internal _name;
    string internal _symbol;
    uint8 internal _decimals;
    uint256 internal _totalSupply;

    mapping (address => uint256) internal balances;
    mapping (address => mapping (address => uint256)) internal allowed;
    mapping (address => bool) public frozenAccount;
    mapping (address => uint) public lockedTime;
    
    event FrozenFunds(address target, bool frozen);
    event LockedTime(address target, uint _time);
    
    event Burn(address indexed from, uint256 value);

    event ContractFrozen(bool status);
    
    bool public isContractFrozen = false;

    function Authored(string name, string symbol, uint8 decimals, uint256 totalSupply) public {
        _symbol = symbol;
        _name = name;
        _decimals = decimals;
        _totalSupply = totalSupply * 10 ** uint256(decimals);
        balances[msg.sender] = totalSupply * 10 ** uint256(decimals);
    }

    function name()
        public
        view
        returns (string) {
        return _name;
    }

    function symbol()
        public
        view
        returns (string) {
        return _symbol;
    }

    function decimals()
        public
        view
        returns (uint8) {
        return _decimals;
    }

    function totalSupply()
        public
        view
        returns (uint256) {
        return _totalSupply;
    }
    
   function transfer(address _to, uint256 _value) public returns (bool) {
     require(!isContractFrozen);
     require(!frozenAccount[msg.sender]);
     require(!frozenAccount[_to]);
     require(now > lockedTime[msg.sender]);
     
     require(_to != address(0));
     require(_value <= balances[msg.sender]);
     balances[msg.sender] = SafeMath.sub(balances[msg.sender], _value);
     balances[_to] = SafeMath.add(balances[_to], _value);
     Transfer(msg.sender, _to, _value);
     return true;
   }

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

  function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
     require(!isContractFrozen);
     require(!frozenAccount[_from]);
     require(!frozenAccount[_to]);
     require(now > lockedTime[_from]);
     
     require(_to != address(0));
     require(_value <= balances[_from]);
     require(_value <= allowed[_from][msg.sender]);

     balances[_from] = SafeMath.sub(balances[_from], _value);
     balances[_to] = SafeMath.add(balances[_to], _value);
     allowed[_from][msg.sender] = SafeMath.sub(allowed[_from][msg.sender], _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] = SafeMath.add(allowed[msg.sender][_spender], _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] = SafeMath.sub(oldValue, _subtractedValue);
    }
     Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
     return true;
   }

    function transfer(address _to, uint _value, bytes _data) public {
        require(!isContractFrozen);
        require(!frozenAccount[msg.sender]);
        require(!frozenAccount[_to]);
        require(now > lockedTime[msg.sender]);
     
        require(_value > 0 );
        if(isContract(_to)) {
            ERC223ReceivingContract receiver = ERC223ReceivingContract(_to);
            receiver.tokenFallback(msg.sender, _value, _data);
        }
        balances[msg.sender] = balances[msg.sender].sub(_value);
        balances[_to] = balances[_to].add(_value);
        Transfer(msg.sender, _to, _value, _data);
    }

    function isContract(address _addr) private returns (bool is_contract) {
      uint length;
      assembly {
            length := extcodesize(_addr)
      }
      return (length>0);
    }
    
    function freezeAccount(address target, bool freeze) onlyOwner public {
        frozenAccount[target] = freeze;
        FrozenFunds(target, freeze);
    }
    
    function lockTime(address target, uint _time) onlyOwner public {
        lockedTime[target] = _time;
        LockedTime(target, _time);
    }

    function currentTime()
        public
        view
        returns (uint256) {
        return now;
    }
    
    function setContractFrozen(bool status) onlyOwner public {
        isContractFrozen = status;
        ContractFrozen(status);
    }
    
    function generate(uint256 _value) onlyOwner public {
        _totalSupply = SafeMath.add(_totalSupply, _value * 10 ** uint256(_decimals));
        balances[msg.sender] = SafeMath.add(balances[msg.sender], _value * 10 ** uint256(_decimals));
    }
    
    function burn(uint256 _value) public returns (bool success) {
        require(balances[msg.sender] >= _value);
        balances[msg.sender] = SafeMath.sub(balances[msg.sender], _value);
        _totalSupply = SafeMath.sub(_totalSupply, _value);
        Burn(msg.sender, _value);
        return true;
    }

    function burnFrom(address _from, uint256 _value) public returns (bool success) {
        require(balances[_from] >= _value);
        require(_value <= allowed[_from][msg.sender]);
        balances[_from] = SafeMath.sub(balances[_from], _value);
        allowed[_from][msg.sender] = SafeMath.sub(allowed[_from][msg.sender], _value);
        _totalSupply = SafeMath.sub(_totalSupply, _value);
        Burn(_from, _value);
        return true;
    }
}

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;
  }
}