// File: node_modules\openzeppelin-solidity\contracts\token\ERC20\ERC20Basic.sol

pragma solidity ^0.4.24;


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * See https://github.com/ethereum/EIPs/issues/179
 */
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);
}

// File: node_modules\openzeppelin-solidity\contracts\math\SafeMath.sol

pragma solidity ^0.4.24;


/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
    // Gas optimization: this is cheaper than asserting 'a' not being zero, but the
    // benefit is lost if 'b' is also tested.
    // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
    if (_a == 0) {
      return 0;
    }

    c = _a * _b;
    assert(c / _a == _b);
    return c;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  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 _a / _b;
  }

  /**
  * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
    assert(_b <= _a);
    return _a - _b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
    c = _a + _b;
    assert(c >= _a);
    return c;
  }
}

// File: node_modules\openzeppelin-solidity\contracts\token\ERC20\BasicToken.sol

pragma solidity ^0.4.24;




/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) internal balances;

  uint256 internal totalSupply_;

  /**
  * @dev Total number of tokens in existence
  */
  function totalSupply() public view returns (uint256) {
    return totalSupply_;
  }

  /**
  * @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(_value <= balances[msg.sender]);
    require(_to != address(0));

    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    emit 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 view returns (uint256) {
    return balances[_owner];
  }

}

// File: node_modules\openzeppelin-solidity\contracts\token\ERC20\ERC20.sol

pragma solidity ^0.4.24;



/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
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
  );
}

// File: openzeppelin-solidity\contracts\token\ERC20\StandardToken.sol

pragma solidity ^0.4.24;




/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * https://github.com/ethereum/EIPs/issues/20
 * 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)) 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(_value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);
    require(_to != address(0));

    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 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,
    uint256 _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,
    uint256 _subtractedValue
  )
    public
    returns (bool)
  {
    uint256 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;
  }

}

// File: openzeppelin-solidity\contracts\ownership\Ownable.sol

pragma solidity ^0.4.24;


/**
 * @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 OwnershipRenounced(address indexed previousOwner);
  event OwnershipTransferred(
    address indexed previousOwner,
    address indexed newOwner
  );


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  constructor() 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 relinquish control of the contract.
   * @notice Renouncing to ownership will leave the contract without an owner.
   * It will not be possible to call the functions with the `onlyOwner`
   * modifier anymore.
   */
  function renounceOwnership() public onlyOwner {
    emit OwnershipRenounced(owner);
    owner = address(0);
  }

  /**
   * @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 {
    _transferOwnership(_newOwner);
  }

  /**
   * @dev Transfers control of the contract to a newOwner.
   * @param _newOwner The address to transfer ownership to.
   */
  function _transferOwnership(address _newOwner) internal {
    require(_newOwner != address(0));
    emit OwnershipTransferred(owner, _newOwner);
    owner = _newOwner;
  }
}

// File: openzeppelin-solidity\contracts\token\ERC1132\ERC1132.sol

pragma solidity ^0.4.24;

contract ERC1132 {
    /**
     * @dev Reasons why a user's tokens have been locked
     */
    mapping(address => bytes32[]) public lockReason;

    /**
     * @dev locked token structure
     */
    struct lockToken {
        uint256 amount;
        uint256 validity;
        bool claimed;
    }

    /**
     * @dev Holds number & validity of tokens locked for a given reason for
     *      a specified address
     */
    mapping(address => mapping(bytes32 => lockToken)) public locked;

    /**
     * @dev Records data of all the tokens Locked
     */
    event Locked(
        address indexed _of,
        bytes32 indexed _reason,
        uint256 _amount,
        uint256 _validity
    );

    /**
     * @dev Records data of all the tokens unlocked
     */
    event Unlocked(
        address indexed _of,
        bytes32 indexed _reason,
        uint256 _amount
    );
    
    /**
     * @dev Locks a specified amount of tokens against an address,
     *      for a specified reason and time
     * @param _reason The reason to lock tokens
     * @param _amount Number of tokens to be locked
     * @param _time Lock time in seconds
     */
    function lock(bytes32 _reason, uint256 _amount, uint256 _time, address _of)
        public returns (bool);
  
    /**
     * @dev Returns tokens locked for a specified address for a
     *      specified reason
     *
     * @param _of The address whose tokens are locked
     * @param _reason The reason to query the lock tokens for
     */
    function tokensLocked(address _of, bytes32 _reason)
        public view returns (uint256 amount);
    
    /**
     * @dev Returns tokens locked for a specified address for a
     *      specified reason at a specific time
     *
     * @param _of The address whose tokens are locked
     * @param _reason The reason to query the lock tokens for
     * @param _time The timestamp to query the lock tokens for
     */
    function tokensLockedAtTime(address _of, bytes32 _reason, uint256 _time)
        public view returns (uint256 amount);
    
    /**
     * @dev Returns total tokens held by an address (locked + transferable)
     * @param _of The address to query the total balance of
     */
    function totalBalanceOf(address _of)
        public view returns (uint256 amount);
    
    /**
     * @dev Extends lock for a specified reason and time
     * @param _reason The reason to lock tokens
     * @param _time Lock extension time in seconds
     */
    function extendLock(bytes32 _reason, uint256 _time)
        public returns (bool);
    
    /**
     * @dev Increase number of tokens locked for a specified reason
     * @param _reason The reason to lock tokens
     * @param _amount Number of tokens to be increased
     */
    function increaseLockAmount(bytes32 _reason, uint256 _amount)
        public returns (bool);

    /**
     * @dev Returns unlockable tokens for a specified address for a specified reason
     * @param _of The address to query the the unlockable token count of
     * @param _reason The reason to query the unlockable tokens for
     */
    function tokensUnlockable(address _of, bytes32 _reason)
        public view returns (uint256 amount);
 
    /**
     * @dev Unlocks the unlockable tokens of a specified address
     * @param _of Address of user, claiming back unlockable tokens
     */
    function unlock(address _of)
        public returns (uint256 unlockableTokens);

    /**
     * @dev Gets the unlockable tokens of a specified address
     * @param _of The address to query the the unlockable token count of
     */
    function getUnlockableTokens(address _of)
        public view returns (uint256 unlockableTokens);

}

// File: contracts\BiibroSToken.sol

pragma solidity ^0.4.24;

// Import





// Contract
contract BiibroSToken is StandardToken, Ownable, ERC1132 {
	// Define constants
	string public constant name 					= "S-Token";
	string public constant symbol 					= "STO";
	uint256 public constant decimals 				= 18;
	uint256 public constant INITIAL_SUPPLY 				= 500000000000 * (10 ** decimals);
    
	constructor() public {
        	totalSupply_ 						= INITIAL_SUPPLY;
		balances[msg.sender] 					= INITIAL_SUPPLY;
	}

	// Define events
    	event Mint(address minter, uint256 value);
	event Burn(address burner, uint256 value);

	// Dev Error messages for require statements
	string internal constant INVALID_TOKEN_VALUES 			= 'Invalid token values';
	string internal constant NOT_ENOUGH_TOKENS 			= 'Not enough tokens';
	string internal constant ALREADY_LOCKED 			= 'Tokens already locked';
	string internal constant NOT_LOCKED 				= 'No tokens locked';
	string internal constant AMOUNT_ZERO 				= 'Amount can not be 0';

	// Mint
	function mint(address _to, uint256 _amount) public onlyOwner {
        	require(_amount > 0, INVALID_TOKEN_VALUES);
        	
		balances[_to] 						= balances[_to].add(_amount);
        	totalSupply_ 						= totalSupply_.add(_amount);
        	
		emit Mint(_to, _amount);
	}	

	// Burn
	function burn(address _of, uint256 _amount) public onlyOwner {
        	require(_amount > 0, INVALID_TOKEN_VALUES);
        	require(_amount <= balances[_of], NOT_ENOUGH_TOKENS);
        	
		balances[_of] 						= balances[_of].sub(_amount);
        	totalSupply_ 						= totalSupply_.sub(_amount);
        	
		emit Burn(_of, _amount);
	}

	// Lock - Important
    	function lock(bytes32 _reason, uint256 _amount, uint256 _time, address _of) public onlyOwner returns (bool) {
        	uint256 validUntil 					= now.add(_time);

		require(_amount <= balances[_of], NOT_ENOUGH_TOKENS);
		require(tokensLocked(_of, _reason) == 0, ALREADY_LOCKED);
		require(_amount != 0, AMOUNT_ZERO);

		if (locked[_of][_reason].amount == 0)
			lockReason[_of].push(_reason);

		balances[address(this)] = balances[address(this)].add(_amount);
		balances[_of] = balances[_of].sub(_amount);

		locked[_of][_reason] = lockToken(_amount, validUntil, false);

		emit Transfer(_of, address(this), _amount);
		emit Locked(_of, _reason, _amount, validUntil);
		
		return true;
    	}

    	function transferWithLock(address _to, bytes32 _reason, uint256 _amount, uint256 _time) public returns (bool) {
        	uint256 validUntil 					= now.add(_time); 

        	require(tokensLocked(_to, _reason) == 0, ALREADY_LOCKED);
        	require(_amount != 0, AMOUNT_ZERO);

        	if (locked[_to][_reason].amount == 0)
            		lockReason[_to].push(_reason);

        	transfer(address(this), _amount);

        	locked[_to][_reason] 					= lockToken(_amount, validUntil, false);

        	emit Locked(_to, _reason, _amount, validUntil);
        
		return true;
    	}

    	function tokensLocked(address _of, bytes32 _reason) public view returns (uint256 amount) {	
        	if (!locked[_of][_reason].claimed)
            		amount 						= locked[_of][_reason].amount;
    	}

    	function tokensLockedAtTime(address _of, bytes32 _reason, uint256 _time) public view returns (uint256 amount) {
        	if (locked[_of][_reason].validity > _time)
            		amount 						= locked[_of][_reason].amount;
    	}

    	function totalBalanceOf(address _of) public view returns (uint256 amount) {
        	amount 							= balanceOf(_of);

        	for (uint256 i = 0; i < lockReason[_of].length; i++) {
            		amount 						= amount.add(tokensLocked(_of, lockReason[_of][i]));
        	}
    	}

    	function extendLock(bytes32 _reason, uint256 _time) public returns (bool) {
        	require(tokensLocked(msg.sender, _reason) > 0, NOT_LOCKED);

        	locked[msg.sender][_reason].validity 			= locked[msg.sender][_reason].validity.add(_time);

        	emit Locked(msg.sender, _reason, locked[msg.sender][_reason].amount, locked[msg.sender][_reason].validity);
        
		return true;
    	}	

    	function increaseLockAmount(bytes32 _reason, uint256 _amount) public returns (bool) {
        	require(tokensLocked(msg.sender, _reason) > 0, NOT_LOCKED);
        	
		transfer(address(this), _amount);

        	locked[msg.sender][_reason].amount 			= locked[msg.sender][_reason].amount.add(_amount);

        	emit Locked(msg.sender, _reason, locked[msg.sender][_reason].amount, locked[msg.sender][_reason].validity);
        
		return true;
   	}

    	function tokensUnlockable(address _of, bytes32 _reason) public view returns (uint256 amount) {
        	if (locked[_of][_reason].validity <= now && !locked[_of][_reason].claimed) 
            		amount 						= locked[_of][_reason].amount;
    	}

    	function unlock(address _of) public returns (uint256 unlockableTokens) {
        	uint256 lockedTokens;

        	for (uint256 i = 0; i < lockReason[_of].length; i++) {
            		lockedTokens 					= tokensUnlockable(_of, lockReason[_of][i]);
            
	    		if (lockedTokens > 0) {
                		unlockableTokens 			= unlockableTokens.add(lockedTokens);
                		locked[_of][lockReason[_of][i]].claimed = true;

                		emit Unlocked(_of, lockReason[_of][i], lockedTokens);
            		}
        	}

        	if (unlockableTokens > 0)
            		this.transfer(_of, unlockableTokens);
    	}

    	function getUnlockableTokens(address _of) public view returns (uint256 unlockableTokens) {
        	for (uint256 i = 0; i < lockReason[_of].length; i++) {
            		unlockableTokens 				= unlockableTokens.add(tokensUnlockable(_of, lockReason[_of][i]));
        	}
    	}
}