pragma solidity ^0.4.23;



library SafeMath {

  
  function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
    
    
    
    if (a == 0) {
      return 0;
    }

    c = a * b;
    assert(c / a == b);
    return c;
  }

  
  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    
    
    
    return a / b;
  }

  
  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 c) {
    c = a + b;
    assert(c >= a);
    return c;
  }
}


pragma solidity ^0.4.23;



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);
}


pragma solidity ^0.4.23;





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
  );
}


pragma solidity ^0.4.23;






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

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

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


pragma solidity ^0.4.23;







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);
    emit Transfer(msg.sender, _to, _value);
    return true;
  }

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

}


pragma solidity ^0.4.23;






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);
    emit Transfer(_from, _to, _value);
    return true;
  }

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

}


pragma solidity ^0.4.23;



contract Ownable {
  address public owner;


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


  
  constructor() public {
    owner = msg.sender;
  }

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

  
  function renounceOwnership() public onlyOwner {
    emit OwnershipRenounced(owner);
    owner = address(0);
  }

  
  function transferOwnership(address _newOwner) public onlyOwner {
    _transferOwnership(_newOwner);
  }

  
  function _transferOwnership(address _newOwner) internal {
    require(_newOwner != address(0));
    emit OwnershipTransferred(owner, _newOwner);
    owner = _newOwner;
  }
}


pragma solidity ^0.4.23;






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

  bool public mintingFinished = false;


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

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

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

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


pragma solidity ^0.4.23;






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;
    emit Pause();
  }

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


pragma solidity ^0.4.23;






contract PausableToken is StandardToken, 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);
  }
}


pragma solidity ^0.4.23;





contract BurnableToken is BasicToken {

  event Burn(address indexed burner, uint256 value);

  
  function burn(uint256 _value) public {
    _burn(msg.sender, _value);
  }

  function _burn(address _who, uint256 _value) internal {
    require(_value <= balances[_who]);
    
    

    balances[_who] = balances[_who].sub(_value);
    totalSupply_ = totalSupply_.sub(_value);
    emit Burn(_who, _value);
    emit Transfer(_who, address(0), _value);
  }
}


pragma solidity ^0.4.23;







contract CanReclaimToken is Ownable {
  using SafeERC20 for ERC20Basic;

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

}



pragma solidity ^0.4.24;







contract GotToken is CanReclaimToken, MintableToken, PausableToken, BurnableToken {
    string public constant name = "GOToken";
    string public constant symbol = "GOT";
    uint8 public constant decimals = 18;

    
    constructor() public {
        
        paused = true;
    }
}





pragma solidity ^0.4.24;







contract PGOMonthlyInternalVault {
    using SafeMath for uint256;
    using SafeERC20 for GotToken;

    struct Investment {
        address beneficiary;
        uint256 totalBalance;
        uint256 released;
    }

    
    uint256 public constant VESTING_DIV_RATE = 21;                  
    uint256 public constant VESTING_INTERVAL = 30 days;             
    uint256 public constant VESTING_CLIFF = 90 days;                
    uint256 public constant VESTING_DURATION = 720 days;            

    GotToken public token;
    uint256 public start;
    uint256 public end;
    uint256 public cliff;

    

    
    

    mapping(address => Investment) public investments;

    
    function init(address[] beneficiaries, uint256[] balances, uint256 startTime, address _token) public {
        
        require(token == address(0));
        require(beneficiaries.length == balances.length);

        start = startTime;
        cliff = start.add(VESTING_CLIFF);
        end = start.add(VESTING_DURATION);

        token = GotToken(_token);

        for (uint256 i = 0; i < beneficiaries.length; i = i.add(1)) {
            investments[beneficiaries[i]] = Investment(beneficiaries[i], balances[i], 0);
        }
    }

    
    function release(address beneficiary) public {
        uint256 unreleased = releasableAmount(beneficiary);
        require(unreleased > 0);

        investments[beneficiary].released = investments[beneficiary].released.add(unreleased);
        token.safeTransfer(beneficiary, unreleased);
    }

    
    function release() public {
        release(msg.sender);
    }

    
    function getInvestment(address beneficiary) public view returns(address, uint256, uint256) {
        return (
            investments[beneficiary].beneficiary,
            investments[beneficiary].totalBalance,
            investments[beneficiary].released
        );
    }

    
    function releasableAmount(address beneficiary) public view returns (uint256) {
        return vestedAmount(beneficiary).sub(investments[beneficiary].released);
    }

    
    function vestedAmount(address beneficiary) public view returns (uint256) {
        uint256 vested = 0;
        if (block.timestamp >= cliff && block.timestamp < end) {
            
            uint256 totalBalance = investments[beneficiary].totalBalance;
            uint256 monthlyBalance = totalBalance.div(VESTING_DIV_RATE);
            uint256 time = block.timestamp.sub(cliff);
            uint256 elapsedOffsets = time.div(VESTING_INTERVAL);
            uint256 vestedToSum = elapsedOffsets.mul(monthlyBalance);
            vested = vested.add(vestedToSum);
        }
        if (block.timestamp >= end) {
            
            vested = investments[beneficiary].totalBalance;
        }
        return vested;
    }
}