pragma solidity ^0.5.0;

// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
interface IERC20 {
    function transfer(address to, uint256 value) external returns (bool);

    function approve(address spender, uint256 value) external returns (bool);

    function transferFrom(address from, address to, uint256 value) external returns (bool);

    function totalSupply() external view returns (uint256);

    function balanceOf(address who) external view returns (uint256);

    function allowance(address owner, address spender) external view returns (uint256);

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: openzeppelin-solidity/contracts/math/SafeMath.sol

/**
 * @title SafeMath
 * @dev Unsigned math operations with safety checks that revert on error
 */
library SafeMath {
    /**
    * @dev Multiplies two unsigned integers, reverts on overflow.
    */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring '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;
        }

        uint256 c = a * b;
        require(c / a == b);

        return c;
    }

    /**
    * @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero.
    */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
    * @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
    */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a);
        uint256 c = a - b;

        return c;
    }

    /**
    * @dev Adds two unsigned integers, reverts on overflow.
    */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a);

        return c;
    }

    /**
    * @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
    * reverts when dividing by zero.
    */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b != 0);
        return a % b;
    }
}

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol

/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
 * Originally based on code by FirstBlood:
 * https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 *
 * This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for
 * all accounts just by listening to said events. Note that this isn't required by the specification, and other
 * compliant implementations may not do it.
 */
contract ERC20 is IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowed;

    uint256 private _totalSupply;

    /**
    * @dev Total number of tokens in existence
    */
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    /**
    * @dev Gets the balance of the specified address.
    * @param owner The address to query 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];
    }

    /**
     * @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 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) {
        _transfer(msg.sender, 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) {
        require(spender != address(0));

        _allowed[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }

    /**
     * @dev Transfer tokens from one address to another.
     * Note that while this function emits an Approval event, this is not required as per the specification,
     * and other compliant implementations may not emit the event.
     * @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) {
        _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
        _transfer(from, to, value);
        emit Approval(from, msg.sender, _allowed[from][msg.sender]);
        return true;
    }

    /**
     * @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
     * Emits an Approval event.
     * @param spender The address which will spend the funds.
     * @param addedValue The amount of tokens to increase the allowance by.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        require(spender != address(0));

        _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
     * Emits an Approval event.
     * @param spender The address which will spend the funds.
     * @param subtractedValue The amount of tokens to decrease the allowance by.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        require(spender != address(0));

        _allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue);
        emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
        return true;
    }

    /**
    * @dev Transfer token for a specified addresses
    * @param from The address to transfer from.
    * @param to The address to transfer to.
    * @param value The amount to be transferred.
    */
    function _transfer(address from, address to, uint256 value) internal {
        require(to != address(0));

        _balances[from] = _balances[from].sub(value);
        _balances[to] = _balances[to].add(value);
        emit Transfer(from, to, value);
    }

    /**
     * @dev Internal function that mints an amount of the token and assigns it to
     * an account. This encapsulates the modification of balances such that the
     * proper events are emitted.
     * @param account The account that will receive the created tokens.
     * @param value The amount that will be created.
     */
    function _mint(address account, uint256 value) internal {
        require(account != address(0));

        _totalSupply = _totalSupply.add(value);
        _balances[account] = _balances[account].add(value);
        emit Transfer(address(0), account, value);
    }

    /**
     * @dev Internal function that burns an amount of the token of a given
     * account.
     * @param account The account whose tokens will be burnt.
     * @param value The amount that will be burnt.
     */
    function _burn(address account, uint256 value) internal {
        require(account != address(0));

        _totalSupply = _totalSupply.sub(value);
        _balances[account] = _balances[account].sub(value);
        emit Transfer(account, address(0), value);
    }

    /**
     * @dev Internal function that burns an amount of the token of a given
     * account, deducting from the sender's allowance for said account. Uses the
     * internal burn function.
     * Emits an Approval event (reflecting the reduced allowance).
     * @param account The account whose tokens will be burnt.
     * @param value The amount that will be burnt.
     */
    function _burnFrom(address account, uint256 value) internal {
        _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
        _burn(account, value);
        emit Approval(account, msg.sender, _allowed[account][msg.sender]);
    }
}

// File: openzeppelin-solidity/contracts/access/Roles.sol

/**
 * @title Roles
 * @dev Library for managing addresses assigned to a Role.
 */
library Roles {
    struct Role {
        mapping (address => bool) bearer;
    }

    /**
     * @dev give an account access to this role
     */
    function add(Role storage role, address account) internal {
        require(account != address(0));
        require(!has(role, account));

        role.bearer[account] = true;
    }

    /**
     * @dev remove an account's access to this role
     */
    function remove(Role storage role, address account) internal {
        require(account != address(0));
        require(has(role, account));

        role.bearer[account] = false;
    }

    /**
     * @dev check if an account has this role
     * @return bool
     */
    function has(Role storage role, address account) internal view returns (bool) {
        require(account != address(0));
        return role.bearer[account];
    }
}

// File: openzeppelin-solidity/contracts/access/roles/MinterRole.sol

contract MinterRole {
    using Roles for Roles.Role;

    event MinterAdded(address indexed account);
    event MinterRemoved(address indexed account);

    Roles.Role private _minters;

    constructor () internal {
        _addMinter(msg.sender);
    }

    modifier onlyMinter() {
        require(isMinter(msg.sender));
        _;
    }

    function isMinter(address account) public view returns (bool) {
        return _minters.has(account);
    }

    function addMinter(address account) public onlyMinter {
        _addMinter(account);
    }

    function renounceMinter() public {
        _removeMinter(msg.sender);
    }

    function _addMinter(address account) internal {
        _minters.add(account);
        emit MinterAdded(account);
    }

    function _removeMinter(address account) internal {
        _minters.remove(account);
        emit MinterRemoved(account);
    }
}

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Mintable.sol

/**
 * @title ERC20Mintable
 * @dev ERC20 minting logic
 */
contract ERC20Mintable is ERC20, MinterRole {
    /**
     * @dev Function to mint tokens
     * @param to The address that will receive the minted tokens.
     * @param value The amount of tokens to mint.
     * @return A boolean that indicates if the operation was successful.
     */
    function mint(address to, uint256 value) public onlyMinter returns (bool) {
        _mint(to, value);
        return true;
    }
}

// File: openzeppelin-solidity/contracts/token/ERC20/SafeERC20.sol

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure.
 * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        require(token.transfer(to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        require(token.transferFrom(from, to, value));
    }

    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require((value == 0) || (token.allowance(msg.sender, spender) == 0));
        require(token.approve(spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        require(token.approve(spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value);
        require(token.approve(spender, newAllowance));
    }
}

// File: openzeppelin-solidity/contracts/token/ERC20/TokenTimelock.sol

/**
 * @title TokenTimelock
 * @dev TokenTimelock is a token holder contract that will allow a
 * beneficiary to extract the tokens after a given release time
 */
contract TokenTimelock {
    using SafeERC20 for IERC20;

    // ERC20 basic token contract being held
    IERC20 private _token;

    // beneficiary of tokens after they are released
    address private _beneficiary;

    // timestamp when token release is enabled
    uint256 private _releaseTime;

    constructor (IERC20 token, address beneficiary, uint256 releaseTime) public {
        // solhint-disable-next-line not-rely-on-time
        require(releaseTime > block.timestamp);
        _token = token;
        _beneficiary = beneficiary;
        _releaseTime = releaseTime;
    }

    /**
     * @return the token being held.
     */
    function token() public view returns (IERC20) {
        return _token;
    }

    /**
     * @return the beneficiary of the tokens.
     */
    function beneficiary() public view returns (address) {
        return _beneficiary;
    }

    /**
     * @return the time when the tokens are released.
     */
    function releaseTime() public view returns (uint256) {
        return _releaseTime;
    }

    /**
     * @notice Transfers tokens held by timelock to beneficiary.
     */
    function release() public {
        // solhint-disable-next-line not-rely-on-time
        require(block.timestamp >= _releaseTime);

        uint256 amount = _token.balanceOf(address(this));
        require(amount > 0);

        _token.safeTransfer(_beneficiary, amount);
    }
}

// File: openzeppelin-solidity/contracts/access/roles/PauserRole.sol

contract PauserRole {
    using Roles for Roles.Role;

    event PauserAdded(address indexed account);
    event PauserRemoved(address indexed account);

    Roles.Role private _pausers;

    constructor () internal {
        _addPauser(msg.sender);
    }

    modifier onlyPauser() {
        require(isPauser(msg.sender));
        _;
    }

    function isPauser(address account) public view returns (bool) {
        return _pausers.has(account);
    }

    function addPauser(address account) public onlyPauser {
        _addPauser(account);
    }

    function renouncePauser() public {
        _removePauser(msg.sender);
    }

    function _addPauser(address account) internal {
        _pausers.add(account);
        emit PauserAdded(account);
    }

    function _removePauser(address account) internal {
        _pausers.remove(account);
        emit PauserRemoved(account);
    }
}

// File: openzeppelin-solidity/contracts/lifecycle/Pausable.sol

/**
 * @title Pausable
 * @dev Base contract which allows children to implement an emergency stop mechanism.
 */
contract Pausable is PauserRole {
    event Paused(address account);
    event Unpaused(address account);

    bool private _paused;

    constructor () internal {
        _paused = false;
    }

    /**
     * @return true if the contract is paused, false otherwise.
     */
    function paused() public view returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     */
    modifier whenNotPaused() {
        require(!_paused);
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     */
    modifier whenPaused() {
        require(_paused);
        _;
    }

    /**
     * @dev called by the owner to pause, triggers stopped state
     */
    function pause() public onlyPauser whenNotPaused {
        _paused = true;
        emit Paused(msg.sender);
    }

    /**
     * @dev called by the owner to unpause, returns to normal state
     */
    function unpause() public onlyPauser whenPaused {
        _paused = false;
        emit Unpaused(msg.sender);
    }
}

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Pausable.sol

/**
 * @title Pausable token
 * @dev ERC20 modified with pausable transfers.
 **/
contract ERC20Pausable is ERC20, 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 increaseAllowance(address spender, uint addedValue) public whenNotPaused returns (bool success) {
        return super.increaseAllowance(spender, addedValue);
    }

    function decreaseAllowance(address spender, uint subtractedValue) public whenNotPaused returns (bool success) {
        return super.decreaseAllowance(spender, subtractedValue);
    }
}

// File: openzeppelin-solidity/contracts/utils/ReentrancyGuard.sol

/**
 * @title Helps contracts guard against reentrancy attacks.
 * @author Remco Bloemen <remco@2π.com>, Eenae <alexey@mixbytes.io>
 * @dev If you mark a function `nonReentrant`, you should also
 * mark it `external`.
 */
contract ReentrancyGuard {
    /// @dev counter to allow mutex lock with only one SSTORE operation
    uint256 private _guardCounter;

    constructor () internal {
        // The counter starts at one to prevent changing it from zero to a non-zero
        // value, which is a more expensive operation.
        _guardCounter = 1;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _guardCounter += 1;
        uint256 localCounter = _guardCounter;
        _;
        require(localCounter == _guardCounter);
    }
}

// File: openzeppelin-solidity/contracts/crowdsale/Crowdsale.sol

/**
 * @title Crowdsale
 * @dev Crowdsale is a base contract for managing a token crowdsale,
 * allowing investors to purchase tokens with ether. This contract implements
 * such functionality in its most fundamental form and can be extended to provide additional
 * functionality and/or custom behavior.
 * The external interface represents the basic interface for purchasing tokens, and conform
 * the base architecture for crowdsales. They are *not* intended to be modified / overridden.
 * The internal interface conforms the extensible and modifiable surface of crowdsales. Override
 * the methods to add functionality. Consider using 'super' where appropriate to concatenate
 * behavior.
 */
contract Crowdsale is ReentrancyGuard {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    // The token being sold
    IERC20 private _token;

    // Address where funds are collected
    address payable private _wallet;

    // How many token units a buyer gets per wei.
    // The rate is the conversion between wei and the smallest and indivisible token unit.
    // So, if you are using a rate of 1 with a ERC20Detailed token with 3 decimals called TOK
    // 1 wei will give you 1 unit, or 0.001 TOK.
    uint256 private _rate;

    // Amount of wei raised
    uint256 private _weiRaised;

    /**
     * Event for token purchase logging
     * @param purchaser who paid for the tokens
     * @param beneficiary who got the tokens
     * @param value weis paid for purchase
     * @param amount amount of tokens purchased
     */
    event TokensPurchased(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);

    /**
     * @param rate Number of token units a buyer gets per wei
     * @dev The rate is the conversion between wei and the smallest and indivisible
     * token unit. So, if you are using a rate of 1 with a ERC20Detailed token
     * with 3 decimals called TOK, 1 wei will give you 1 unit, or 0.001 TOK.
     * @param wallet Address where collected funds will be forwarded to
     * @param token Address of the token being sold
     */
    constructor (uint256 rate, address payable wallet, IERC20 token) public {
        require(rate > 0);
        require(wallet != address(0));
        require(address(token) != address(0));

        _rate = rate;
        _wallet = wallet;
        _token = token;
    }

    /**
     * @dev fallback function ***DO NOT OVERRIDE***
     * Note that other contracts will transfer fund with a base gas stipend
     * of 2300, which is not enough to call buyTokens. Consider calling
     * buyTokens directly when purchasing tokens from a contract.
     */
    function () external payable {
        buyTokens(msg.sender);
    }

    /**
     * @return the token being sold.
     */
    function token() public view returns (IERC20) {
        return _token;
    }

    /**
     * @return the address where funds are collected.
     */
    function wallet() public view returns (address payable) {
        return _wallet;
    }

    /**
     * @return the number of token units a buyer gets per wei.
     */
    function rate() public view returns (uint256) {
        return _rate;
    }

    /**
     * @return the amount of wei raised.
     */
    function weiRaised() public view returns (uint256) {
        return _weiRaised;
    }

    /**
     * @dev low level token purchase ***DO NOT OVERRIDE***
     * This function has a non-reentrancy guard, so it shouldn't be called by
     * another `nonReentrant` function.
     * @param beneficiary Recipient of the token purchase
     */
    function buyTokens(address beneficiary) public nonReentrant payable {
        uint256 weiAmount = msg.value;
        _preValidatePurchase(beneficiary, weiAmount);

        // calculate token amount to be created
        uint256 tokens = _getTokenAmount(weiAmount);

        // update state
        _weiRaised = _weiRaised.add(weiAmount);

        _processPurchase(beneficiary, tokens);
        emit TokensPurchased(msg.sender, beneficiary, weiAmount, tokens);

        _updatePurchasingState(beneficiary, weiAmount);

        _forwardFunds();
        _postValidatePurchase(beneficiary, weiAmount);
    }

    /**
     * @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met.
     * Use `super` in contracts that inherit from Crowdsale to extend their validations.
     * Example from CappedCrowdsale.sol's _preValidatePurchase method:
     *     super._preValidatePurchase(beneficiary, weiAmount);
     *     require(weiRaised().add(weiAmount) <= cap);
     * @param beneficiary Address performing the token purchase
     * @param weiAmount Value in wei involved in the purchase
     */
    function _preValidatePurchase(address beneficiary, uint256 weiAmount) internal view {
        require(beneficiary != address(0));
        require(weiAmount != 0);
    }

    /**
     * @dev Validation of an executed purchase. Observe state and use revert statements to undo rollback when valid
     * conditions are not met.
     * @param beneficiary Address performing the token purchase
     * @param weiAmount Value in wei involved in the purchase
     */
    function _postValidatePurchase(address beneficiary, uint256 weiAmount) internal view {
        // solhint-disable-previous-line no-empty-blocks
    }

    /**
     * @dev Source of tokens. Override this method to modify the way in which the crowdsale ultimately gets and sends
     * its tokens.
     * @param beneficiary Address performing the token purchase
     * @param tokenAmount Number of tokens to be emitted
     */
    function _deliverTokens(address beneficiary, uint256 tokenAmount) internal {
        _token.safeTransfer(beneficiary, tokenAmount);
    }

    /**
     * @dev Executed when a purchase has been validated and is ready to be executed. Doesn't necessarily emit/send
     * tokens.
     * @param beneficiary Address receiving the tokens
     * @param tokenAmount Number of tokens to be purchased
     */
    function _processPurchase(address beneficiary, uint256 tokenAmount) internal {
        _deliverTokens(beneficiary, tokenAmount);
    }

    /**
     * @dev Override for extensions that require an internal state to check for validity (current user contributions,
     * etc.)
     * @param beneficiary Address receiving the tokens
     * @param weiAmount Value in wei involved in the purchase
     */
    function _updatePurchasingState(address beneficiary, uint256 weiAmount) internal {
        // solhint-disable-previous-line no-empty-blocks
    }

    /**
     * @dev Override to extend the way in which ether is converted to tokens.
     * @param weiAmount Value in wei to be converted into tokens
     * @return Number of tokens that can be purchased with the specified _weiAmount
     */
    function _getTokenAmount(uint256 weiAmount) internal view returns (uint256) {
        return weiAmount.mul(_rate);
    }

    /**
     * @dev Determines how ETH is stored/forwarded on purchases.
     */
    function _forwardFunds() internal {
        _wallet.transfer(msg.value);
    }
}

// File: openzeppelin-solidity/contracts/crowdsale/emission/MintedCrowdsale.sol

/**
 * @title MintedCrowdsale
 * @dev Extension of Crowdsale contract whose tokens are minted in each purchase.
 * Token ownership should be transferred to MintedCrowdsale for minting.
 */
contract MintedCrowdsale is Crowdsale {
    /**
     * @dev Overrides delivery by minting tokens upon purchase.
     * @param beneficiary Token purchaser
     * @param tokenAmount Number of tokens to be minted
     */
    function _deliverTokens(address beneficiary, uint256 tokenAmount) internal {
        // Potentially dangerous assumption about the type of the token.
        require(ERC20Mintable(address(token())).mint(beneficiary, tokenAmount));
    }
}

// File: openzeppelin-solidity/contracts/crowdsale/validation/CappedCrowdsale.sol

/**
 * @title CappedCrowdsale
 * @dev Crowdsale with a limit for total contributions.
 */
contract CappedCrowdsale is Crowdsale {
    using SafeMath for uint256;

    uint256 private _cap;

    /**
     * @dev Constructor, takes maximum amount of wei accepted in the crowdsale.
     * @param cap Max amount of wei to be contributed
     */
    constructor (uint256 cap) public {
        require(cap > 0);
        _cap = cap;
    }

    /**
     * @return the cap of the crowdsale.
     */
    function cap() public view returns (uint256) {
        return _cap;
    }

    /**
     * @dev Checks whether the cap has been reached.
     * @return Whether the cap was reached
     */
    function capReached() public view returns (bool) {
        return weiRaised() >= _cap;
    }

    /**
     * @dev Extend parent behavior requiring purchase to respect the funding cap.
     * @param beneficiary Token purchaser
     * @param weiAmount Amount of wei contributed
     */
    function _preValidatePurchase(address beneficiary, uint256 weiAmount) internal view {
        super._preValidatePurchase(beneficiary, weiAmount);
        require(weiRaised().add(weiAmount) <= _cap);
    }
}

// File: openzeppelin-solidity/contracts/crowdsale/validation/TimedCrowdsale.sol

/**
 * @title TimedCrowdsale
 * @dev Crowdsale accepting contributions only within a time frame.
 */
contract TimedCrowdsale is Crowdsale {
    using SafeMath for uint256;

    uint256 private _openingTime;
    uint256 private _closingTime;

    /**
     * @dev Reverts if not in crowdsale time range.
     */
    modifier onlyWhileOpen {
        require(isOpen());
        _;
    }

    /**
     * @dev Constructor, takes crowdsale opening and closing times.
     * @param openingTime Crowdsale opening time
     * @param closingTime Crowdsale closing time
     */
    constructor (uint256 openingTime, uint256 closingTime) public {
        // solhint-disable-next-line not-rely-on-time
        require(openingTime >= block.timestamp);
        require(closingTime > openingTime);

        _openingTime = openingTime;
        _closingTime = closingTime;
    }

    /**
     * @return the crowdsale opening time.
     */
    function openingTime() public view returns (uint256) {
        return _openingTime;
    }

    /**
     * @return the crowdsale closing time.
     */
    function closingTime() public view returns (uint256) {
        return _closingTime;
    }

    /**
     * @return true if the crowdsale is open, false otherwise.
     */
    function isOpen() public view returns (bool) {
        // solhint-disable-next-line not-rely-on-time
        return block.timestamp >= _openingTime && block.timestamp <= _closingTime;
    }

    /**
     * @dev Checks whether the period in which the crowdsale is open has already elapsed.
     * @return Whether crowdsale period has elapsed
     */
    function hasClosed() public view returns (bool) {
        // solhint-disable-next-line not-rely-on-time
        return block.timestamp > _closingTime;
    }

    /**
     * @dev Extend parent behavior requiring to be within contributing period
     * @param beneficiary Token purchaser
     * @param weiAmount Amount of wei contributed
     */
    function _preValidatePurchase(address beneficiary, uint256 weiAmount) internal onlyWhileOpen view {
        super._preValidatePurchase(beneficiary, weiAmount);
    }
}

// File: openzeppelin-solidity/contracts/crowdsale/distribution/FinalizableCrowdsale.sol

/**
 * @title FinalizableCrowdsale
 * @dev Extension of Crowdsale with a one-off finalization action, where one
 * can do extra work after finishing.
 */
contract FinalizableCrowdsale is TimedCrowdsale {
    using SafeMath for uint256;

    bool private _finalized;

    event CrowdsaleFinalized();

    constructor () internal {
        _finalized = false;
    }

    /**
     * @return true if the crowdsale is finalized, false otherwise.
     */
    function finalized() public view returns (bool) {
        return _finalized;
    }

    /**
     * @dev Must be called after crowdsale ends, to do some extra finalization
     * work. Calls the contract's finalization function.
     */
    function finalize() public {
        require(!_finalized);
        require(hasClosed());

        _finalized = true;

        _finalization();
        emit CrowdsaleFinalized();
    }

    /**
     * @dev Can be overridden to add finalization logic. The overriding function
     * should call super._finalization() to ensure the chain of finalization is
     * executed entirely.
     */
    function _finalization() internal {
        // solhint-disable-previous-line no-empty-blocks
    }
}

// File: openzeppelin-solidity/contracts/ownership/Secondary.sol

/**
 * @title Secondary
 * @dev A Secondary contract can only be used by its primary account (the one that created it)
 */
contract Secondary {
    address private _primary;

    event PrimaryTransferred(
        address recipient
    );

    /**
     * @dev Sets the primary account to the one that is creating the Secondary contract.
     */
    constructor () internal {
        _primary = msg.sender;
        emit PrimaryTransferred(_primary);
    }

    /**
     * @dev Reverts if called from any account other than the primary.
     */
    modifier onlyPrimary() {
        require(msg.sender == _primary);
        _;
    }

    /**
     * @return the address of the primary.
     */
    function primary() public view returns (address) {
        return _primary;
    }

    /**
     * @dev Transfers contract to a new primary.
     * @param recipient The address of new primary.
     */
    function transferPrimary(address recipient) public onlyPrimary {
        require(recipient != address(0));
        _primary = recipient;
        emit PrimaryTransferred(_primary);
    }
}

// File: openzeppelin-solidity/contracts/payment/escrow/Escrow.sol

/**
 * @title Escrow
 * @dev Base escrow contract, holds funds designated for a payee until they
 * withdraw them.
 * @dev Intended usage: This contract (and derived escrow contracts) should be a
 * standalone contract, that only interacts with the contract that instantiated
 * it. That way, it is guaranteed that all Ether will be handled according to
 * the Escrow rules, and there is no need to check for payable functions or
 * transfers in the inheritance tree. The contract that uses the escrow as its
 * payment method should be its primary, and provide public methods redirecting
 * to the escrow's deposit and withdraw.
 */
contract Escrow is Secondary {
    using SafeMath for uint256;

    event Deposited(address indexed payee, uint256 weiAmount);
    event Withdrawn(address indexed payee, uint256 weiAmount);

    mapping(address => uint256) private _deposits;

    function depositsOf(address payee) public view returns (uint256) {
        return _deposits[payee];
    }

    /**
    * @dev Stores the sent amount as credit to be withdrawn.
    * @param payee The destination address of the funds.
    */
    function deposit(address payee) public onlyPrimary payable {
        uint256 amount = msg.value;
        _deposits[payee] = _deposits[payee].add(amount);

        emit Deposited(payee, amount);
    }

    /**
    * @dev Withdraw accumulated balance for a payee.
    * @param payee The address whose funds will be withdrawn and transferred to.
    */
    function withdraw(address payable payee) public onlyPrimary {
        uint256 payment = _deposits[payee];

        _deposits[payee] = 0;

        payee.transfer(payment);

        emit Withdrawn(payee, payment);
    }
}

// File: openzeppelin-solidity/contracts/payment/escrow/ConditionalEscrow.sol

/**
 * @title ConditionalEscrow
 * @dev Base abstract escrow to only allow withdrawal if a condition is met.
 * @dev Intended usage: See Escrow.sol. Same usage guidelines apply here.
 */
contract ConditionalEscrow is Escrow {
    /**
    * @dev Returns whether an address is allowed to withdraw their funds. To be
    * implemented by derived contracts.
    * @param payee The destination address of the funds.
    */
    function withdrawalAllowed(address payee) public view returns (bool);

    function withdraw(address payable payee) public {
        require(withdrawalAllowed(payee));
        super.withdraw(payee);
    }
}

// File: openzeppelin-solidity/contracts/payment/escrow/RefundEscrow.sol

/**
 * @title RefundEscrow
 * @dev Escrow that holds funds for a beneficiary, deposited from multiple
 * parties.
 * @dev Intended usage: See Escrow.sol. Same usage guidelines apply here.
 * @dev The primary account (that is, the contract that instantiates this
 * contract) may deposit, close the deposit period, and allow for either
 * withdrawal by the beneficiary, or refunds to the depositors. All interactions
 * with RefundEscrow will be made through the primary contract. See the
 * RefundableCrowdsale contract for an example of RefundEscrow’s use.
 */
contract RefundEscrow is ConditionalEscrow {
    enum State { Active, Refunding, Closed }

    event RefundsClosed();
    event RefundsEnabled();

    State private _state;
    address payable private _beneficiary;

    /**
     * @dev Constructor.
     * @param beneficiary The beneficiary of the deposits.
     */
    constructor (address payable beneficiary) public {
        require(beneficiary != address(0));
        _beneficiary = beneficiary;
        _state = State.Active;
    }

    /**
     * @return the current state of the escrow.
     */
    function state() public view returns (State) {
        return _state;
    }

    /**
     * @return the beneficiary of the escrow.
     */
    function beneficiary() public view returns (address) {
        return _beneficiary;
    }

    /**
     * @dev Stores funds that may later be refunded.
     * @param refundee The address funds will be sent to if a refund occurs.
     */
    function deposit(address refundee) public payable {
        require(_state == State.Active);
        super.deposit(refundee);
    }

    /**
     * @dev Allows for the beneficiary to withdraw their funds, rejecting
     * further deposits.
     */
    function close() public onlyPrimary {
        require(_state == State.Active);
        _state = State.Closed;
        emit RefundsClosed();
    }

    /**
     * @dev Allows for refunds to take place, rejecting further deposits.
     */
    function enableRefunds() public onlyPrimary {
        require(_state == State.Active);
        _state = State.Refunding;
        emit RefundsEnabled();
    }

    /**
     * @dev Withdraws the beneficiary's funds.
     */
    function beneficiaryWithdraw() public {
        require(_state == State.Closed);
        _beneficiary.transfer(address(this).balance);
    }

    /**
     * @dev Returns whether refundees can withdraw their deposits (be refunded). The overriden function receives a
     * 'payee' argument, but we ignore it here since the condition is global, not per-payee.
     */
    function withdrawalAllowed(address) public view returns (bool) {
        return _state == State.Refunding;
    }
}

// File: openzeppelin-solidity/contracts/crowdsale/distribution/RefundableCrowdsale.sol

/**
 * @title RefundableCrowdsale
 * @dev Extension of Crowdsale contract that adds a funding goal, and the possibility of users getting a refund if goal
 * is not met.
 *
 * Deprecated, use RefundablePostDeliveryCrowdsale instead. Note that if you allow tokens to be traded before the goal
 * is met, then an attack is possible in which the attacker purchases tokens from the crowdsale and when they sees that
 * the goal is unlikely to be met, they sell their tokens (possibly at a discount). The attacker will be refunded when
 * the crowdsale is finalized, and the users that purchased from them will be left with worthless tokens.
 */
contract RefundableCrowdsale is FinalizableCrowdsale {
    using SafeMath for uint256;

    // minimum amount of funds to be raised in weis
    uint256 private _goal;

    // refund escrow used to hold funds while crowdsale is running
    RefundEscrow private _escrow;

    /**
     * @dev Constructor, creates RefundEscrow.
     * @param goal Funding goal
     */
    constructor (uint256 goal) public {
        require(goal > 0);
        _escrow = new RefundEscrow(wallet());
        _goal = goal;
    }

    /**
     * @return minimum amount of funds to be raised in wei.
     */
    function goal() public view returns (uint256) {
        return _goal;
    }

    /**
     * @dev Investors can claim refunds here if crowdsale is unsuccessful
     * @param refundee Whose refund will be claimed.
     */
    function claimRefund(address payable refundee) public {
        require(finalized());
        require(!goalReached());

        _escrow.withdraw(refundee);
    }

    /**
     * @dev Checks whether funding goal was reached.
     * @return Whether funding goal was reached
     */
    function goalReached() public view returns (bool) {
        return weiRaised() >= _goal;
    }

    /**
     * @dev escrow finalization task, called when finalize() is called
     */
    function _finalization() internal {
        if (goalReached()) {
            _escrow.close();
            _escrow.beneficiaryWithdraw();
        } else {
            _escrow.enableRefunds();
        }

        super._finalization();
    }

    /**
     * @dev Overrides Crowdsale fund forwarding, sending funds to escrow.
     */
    function _forwardFunds() internal {
        _escrow.deposit.value(msg.value)(msg.sender);
    }
}

// File: openzeppelin-solidity/contracts/ownership/Ownable.sol

/**
 * @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 private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev The Ownable constructor sets the original `owner` of the contract to the sender
     * account.
     */
    constructor () internal {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), _owner);
    }

    /**
     * @return the address of the owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner());
        _;
    }

    /**
     * @return true if `msg.sender` is the owner of the contract.
     */
    function isOwner() public view returns (bool) {
        return 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 OwnershipTransferred(_owner, address(0));
        _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/drafts/TokenVesting.sol

/**
 * @title TokenVesting
 * @dev A token holder contract that can release its token balance gradually like a
 * typical vesting scheme, with a cliff and vesting period. Optionally revocable by the
 * owner.
 */
contract TokenVesting is Ownable {
    // The vesting schedule is time-based (i.e. using block timestamps as opposed to e.g. block numbers), and is
    // therefore sensitive to timestamp manipulation (which is something miners can do, to a certain degree). Therefore,
    // it is recommended to avoid using short time durations (less than a minute). Typical vesting schemes, with a cliff
    // period of a year and a duration of four years, are safe to use.
    // solhint-disable not-rely-on-time

    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    event TokensReleased(address token, uint256 amount);
    event TokenVestingRevoked(address token);

    // beneficiary of tokens after they are released
    address private _beneficiary;

    // Durations and timestamps are expressed in UNIX time, the same units as block.timestamp.
    uint256 private _cliff;
    uint256 private _start;
    uint256 private _duration;

    bool private _revocable;

    mapping (address => uint256) private _released;
    mapping (address => bool) private _revoked;

    /**
     * @dev Creates a vesting contract that vests its balance of any ERC20 token to the
     * beneficiary, gradually in a linear fashion until start + duration. By then all
     * of the balance will have vested.
     * @param beneficiary address of the beneficiary to whom vested tokens are transferred
     * @param cliffDuration duration in seconds of the cliff in which tokens will begin to vest
     * @param start the time (as Unix time) at which point vesting starts
     * @param duration duration in seconds of the period in which the tokens will vest
     * @param revocable whether the vesting is revocable or not
     */
    constructor (address beneficiary, uint256 start, uint256 cliffDuration, uint256 duration, bool revocable) public {
        require(beneficiary != address(0));
        require(cliffDuration <= duration);
        require(duration > 0);
        require(start.add(duration) > block.timestamp);

        _beneficiary = beneficiary;
        _revocable = revocable;
        _duration = duration;
        _cliff = start.add(cliffDuration);
        _start = start;
    }

    /**
     * @return the beneficiary of the tokens.
     */
    function beneficiary() public view returns (address) {
        return _beneficiary;
    }

    /**
     * @return the cliff time of the token vesting.
     */
    function cliff() public view returns (uint256) {
        return _cliff;
    }

    /**
     * @return the start time of the token vesting.
     */
    function start() public view returns (uint256) {
        return _start;
    }

    /**
     * @return the duration of the token vesting.
     */
    function duration() public view returns (uint256) {
        return _duration;
    }

    /**
     * @return true if the vesting is revocable.
     */
    function revocable() public view returns (bool) {
        return _revocable;
    }

    /**
     * @return the amount of the token released.
     */
    function released(address token) public view returns (uint256) {
        return _released[token];
    }

    /**
     * @return true if the token is revoked.
     */
    function revoked(address token) public view returns (bool) {
        return _revoked[token];
    }

    /**
     * @notice Transfers vested tokens to beneficiary.
     * @param token ERC20 token which is being vested
     */
    function release(IERC20 token) public {
        uint256 unreleased = _releasableAmount(token);

        require(unreleased > 0);

        _released[address(token)] = _released[address(token)].add(unreleased);

        token.safeTransfer(_beneficiary, unreleased);

        emit TokensReleased(address(token), unreleased);
    }

    /**
     * @notice Allows the owner to revoke the vesting. Tokens already vested
     * remain in the contract, the rest are returned to the owner.
     * @param token ERC20 token which is being vested
     */
    function revoke(IERC20 token) public onlyOwner {
        require(_revocable);
        require(!_revoked[address(token)]);

        uint256 balance = token.balanceOf(address(this));

        uint256 unreleased = _releasableAmount(token);
        uint256 refund = balance.sub(unreleased);

        _revoked[address(token)] = true;

        token.safeTransfer(owner(), refund);

        emit TokenVestingRevoked(address(token));
    }

    /**
     * @dev Calculates the amount that has already vested but hasn't been released yet.
     * @param token ERC20 token which is being vested
     */
    function _releasableAmount(IERC20 token) private view returns (uint256) {
        return _vestedAmount(token).sub(_released[address(token)]);
    }

    /**
     * @dev Calculates the amount that has already vested.
     * @param token ERC20 token which is being vested
     */
    function _vestedAmount(IERC20 token) private view returns (uint256) {
        uint256 currentBalance = token.balanceOf(address(this));
        uint256 totalBalance = currentBalance.add(_released[address(token)]);

        if (block.timestamp < _cliff) {
            return 0;
        } else if (block.timestamp >= _start.add(_duration) || _revoked[address(token)]) {
            return totalBalance;
        } else {
            return totalBalance.mul(block.timestamp.sub(_start)).div(_duration);
        }
    }
}

// File: contracts/WiseCrowdsale.sol

contract WiseTokenCrowdsale is Crowdsale, MintedCrowdsale, CappedCrowdsale, TimedCrowdsale, RefundableCrowdsale, Ownable {
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    //////////////   company  WISE                                                                        //////////////
    //////////////   website  WISE.CR                                                                     //////////////
    //////////////   token    WISE                                                                        //////////////
    //////////////   token symbol   WSE                                                                   //////////////
    //////////////   developer jamesjara                                                                  //////////////
    //////////////                     WSE             USD         TR-USD  TOKEN-RATE        STRATEGY     //////////////
    //////////////   ETH PRICE: $150                                                                      //////////////
    //////////////   TOTAL SUPPLY: 100 000 000       100 000 0000                                         //////////////
    //////////////   AIR-DROPED     5 000 000 (5%)                 $10                       MINTED       //////////////
    //////////////   ADVISORS       4 000 000 (4%)                 $10                       MINTED       //////////////
    //////////////   TEAM           7 000 000 (7%)                 $10                       MINTED       //////////////
    //////////////   BUSINESS      30 000 000 (30%)                $10                       MINTED       //////////////
    //////////////   RESERVER      20 000 000 (20%)                $10                       MINTED       //////////////
    //////////////   PRIVATE       20 000 000 (20%)  60 000 000    $3       50               MANUAL/BUY   //////////////
    //////////////   PRE           10 000 000 (10%)  50 000 000    $5       20               MANUAL/BUY   //////////////
    //////////////   PUBLIC         5 000 000 (5%)   40 000 000    $8       19               BUY          //////////////
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

    // Events
    event EthTransferred(string text);
    event RateChanged(uint256 rate);
    event StageChanged(uint256 stage);
    event TokensQuantityChanged(uint256 stage, uint256 _tokens);
    event MintTokens(address _beneficiary, uint256 _tokens);
    event MintFullTeamDone();

    // Crowdsale
    enum CrowdsaleStage { PrivateICO, PreICO, ICO }
    CrowdsaleStage public stage = CrowdsaleStage.PrivateICO;
    uint256 private _wserate;

    // Token Distribution
    uint256 public totalTokens                = 100000000;
    uint256 public crowdsaleFundDistribution  = 35;
    uint256 public airdroppedFundDistribution = 5;
    uint256 public advisorsFundDistribution   = 3;
    uint256 public teamFundDistribution       = 7;
    uint256 public bussinesFundDistribution   = 30;
    uint256 public reserveFundDistribution    = 20;
    uint256 public privateFundDistribution    = 20;
    uint256 public preFundDistribution        = 10;
    uint256 public publicFundDistribution     = 5;

    // Token funds
    address public crowdsaleFund;
    address public airdroppedFund;
    address public advisorsFund;
    address public teamFund;
    address public bussinesFund;
    address public reserveFund;

    // Tracking tokens
    uint256 public totalPrivateTokens = 0;
    uint256 public totalPreTokens     = 0;
    uint256 public totalPublicTokens  = 0;

    // Vesting
    uint256 public constant VESTING_CLIFF = 365 days;
    uint256 public constant VESTING_DURATION = 1460 days;

    constructor(
      uint256 _rate,
      address payable _wallet,
      ERC20Mintable _token,
      uint256 _cap,
      uint256 _goal,
      address[] memory _fundAddresses,
      uint256 _openingTime,
      uint256 _closingTime
    )
      Crowdsale(_rate, _wallet, _token)
      CappedCrowdsale(_cap)
      TimedCrowdsale(_openingTime, _closingTime)
      RefundableCrowdsale(_goal)
      public
    {
        require(_goal <= _cap, "goal must be equal or less than cap");
        _wserate = _rate;
        airdroppedFund = _fundAddresses[0];
        advisorsFund = _fundAddresses[1];
        teamFund = _fundAddresses[2];
        bussinesFund = _fundAddresses[3];
        reserveFund = _fundAddresses[4];
    }

    /**
      * @dev Change the current rate
      * @param _rate rate
      * @param _multiplier multiplier of the reate
    */
    function setCurrentRate(uint256 _rate, uint256 _multiplier) public onlyOwner {
        // ETH-PRICE / TOKEN-USD-PRICE
        _wserate = _rate.mul(10**_multiplier);
        emit RateChanged(_wserate);
    }

    /**
    * @dev Allows admin to update the crowdsale stage
    * @param _stage Crowdsale stage
    */
    function setCrowdsaleStage(uint _stage) public onlyOwner {
        if(uint(CrowdsaleStage.PrivateICO) == _stage) {
            stage = CrowdsaleStage.PrivateICO;
        } else if (uint(CrowdsaleStage.PreICO) == _stage) {
            stage = CrowdsaleStage.PreICO;
        } else if (uint(CrowdsaleStage.ICO) == _stage) {
            stage = CrowdsaleStage.ICO;
        }
        emit StageChanged(uint(stage));
    }

    /**
      * @dev Update current tokens total stack by stage
      * @param _tokens new tokens
      */
    function updateTokensQuantity(uint256 _tokens) internal {
        if(stage == CrowdsaleStage.PrivateICO) {
            totalPrivateTokens = totalPrivateTokens.add(_tokens);
        } else if (stage == CrowdsaleStage.PreICO) {
            totalPreTokens = totalPreTokens.add(_tokens);
        } else if (stage == CrowdsaleStage.ICO) {
            totalPublicTokens = totalPublicTokens.add(_tokens);
        }
        emit TokensQuantityChanged(uint(stage), _tokens);
    }

    /**
      * @dev Update current tokens total stack by stage for mantaince
      * @param _stage stage
      * @param _tokens new tokens state
      */
    function updateTokensQuantityAdmin(uint _stage, uint256 _tokens) public onlyOwner  {
        if(_stage == uint(CrowdsaleStage.PrivateICO)) {
            totalPrivateTokens = _tokens;
        } else if (_stage == uint(CrowdsaleStage.PreICO)) {
            totalPreTokens = _tokens;
        } else if (_stage == uint(CrowdsaleStage.ICO)) {
            totalPublicTokens = _tokens;
        }
        emit TokensQuantityChanged(_stage, _tokens);
    }

    /**
      * @dev Returns the rate of tokens per wei at the present time.
      * @return The number of tokens a buyer gets per wei at a given time
      */
    function getCurrentRate() public view returns (uint256) {
        return _wserate;
    }

    /**
      * The base rate function is overridden to revert, since this crowdsale doens't use it, and
      * all calls to it are a mistake.
      */
    function rate() public view returns (uint256) {
        return getCurrentRate();
    }

    /**
    * @dev Extend parent behavior verifing the limits of each stage
    * @param _beneficiary Token purchaser
    * @param _weiAmount Amount of wei contributed
    */
    function _preValidatePurchase( address payable _beneficiary, uint256 _weiAmount ) internal {
        super._preValidatePurchase(_beneficiary, _weiAmount);
        require(_validateTokenLimits(_getTokenAmount(_weiAmount)),"max tokens reached");
    }

    /**
      * @dev validates the tokens limit of Private and Public stages
      * @param tokens new tokens
      * @return if it is posible to continue or has reached the limits
      */
    function _validateTokenLimits(uint256 tokens) internal view returns (bool) {
        if(stage == CrowdsaleStage.PrivateICO) {
            require(totalPrivateTokens.add(tokens) <= privateFundDistribution.mul(10**6),"max tokens reached 0");
        } else if (stage == CrowdsaleStage.PreICO) {
            require(totalPreTokens.add(tokens) <= preFundDistribution.mul(10**6),"max tokens reached 1");
        } 
        // else if (stage == CrowdsaleStage.ICO) {
        // Public ICO doesn't have any tokens limits,
        // however will be limited by the cap contract;
        // and the cap will be on ETH rather than tokens.
        // }
        return true;
    }


    /**
      * @dev Calculate tokens amount.
      * @param rateP rate of token
      * @param rateMultiplierP rate multiplier
      * @param weiAmountP wei 
      * @param weiAmountMultiplierP wei multiplier
      * @return The number of tokens _weiAmount wei will buy at present time
      */
    function calculateTokens(uint256 rateP, uint256 rateMultiplierP, uint weiAmountP, uint weiAmountMultiplierP) public view returns (uint256) {
        uint256 currentRate = getCurrentRate();
        uint256 rateLocal = rateP;
        uint256 rateMultiplier = rateMultiplierP;
        uint256 weiAmount = weiAmountP;
        uint256 weiAmountMultiplier = weiAmountMultiplierP;
        if(rateLocal == 0){
            rateLocal = currentRate;
        }
        if(rateMultiplier != 0){
            rateLocal = rateLocal.mul(10**rateMultiplier);
        }
        if(weiAmountMultiplier != 0){
            weiAmount = weiAmount.mul(10**weiAmountMultiplier);
        }
        return weiAmount.div(rateLocal);
    }

    /**
      * @dev Overrides parent method taking into account variable rate.
      * @param weiAmount The value in wei to be converted into tokens
      * @return The number of tokens _weiAmount wei will buy at present time
      */
    function _getTokenAmount(uint256 weiAmount) internal view returns (uint256) {
        uint256 currentRate = getCurrentRate();
        uint256 count = weiAmount.div(currentRate);
        return count * 1 ether;
    }

    /**
      * @dev Utility method to convert wei to tokens
      * @param weiAmount Value in wei to be converted into tokens
      * @return Number of tokens that can be purchased with the specified _weiAmount
      */
    function _getTokenAmountSimple(uint256 weiAmount) internal view returns (uint256) {
        return _getTokenAmount(weiAmount);
    }

    /**
      * @dev Override for extensions that require an internal state to check for validity (current user contributions, etc.)
      * @param beneficiary Address receiving the tokens
      * @param weiAmount Value in wei involved in the purchase
    */
    function _updatePurchasingState(address beneficiary, uint256 weiAmount) internal {
        updateTokensQuantity(_getTokenAmount(weiAmount).div(10**18));
    }

    /**
      * @dev forwards funds to the wallet during the PrivateICO/PreICO stage,
      * then the refund vault during ICO stage using the RefundablePostDeliveryCrowdsale
    */
    function _forwardFunds() internal {
        if(stage == CrowdsaleStage.PrivateICO) {
            address(wallet()).transfer(msg.value);
            emit EthTransferred("forwarding funds to wallet PrivateICO");
        } else if (stage == CrowdsaleStage.PreICO) {
            address(wallet()).transfer(msg.value);
            emit EthTransferred("forwarding funds to wallet PreICO");
        } else if (stage == CrowdsaleStage.ICO) {
            emit EthTransferred("forwarding funds to refundable vault");
            super._forwardFunds();
        }
    }

    /**
      * @dev Allocates tokens for investors that contributed. These include
      * whitelisted investors and investors paying with usd
      * mode mint/manual
      * @param _beneficiary Token purchaser
      * @param _tokens Number of tokens
    */
    function mintTokensInvestors(address _beneficiary, uint256 _tokens) public onlyOwner  {
        uint tokensInWei = _tokens.mul(10**18);
        require(_beneficiary != address(0), "beneficiary cant be address 0");
        require(_tokens > 0, "invalid # of tokens");
        require(_validateTokenLimits(_tokens), "max tokens reached");
        require(ERC20Mintable(address(token())).mint(_beneficiary, tokensInWei), "mint error");
        updateTokensQuantity(_tokens);
        emit MintTokens(_beneficiary, _tokens);
    }

    /**
      * @dev Allocates tokens for each group
      * Requires mintin role
      * mode: mint/manual
    */
    function mintFullTeam() public onlyOwner {
        if(goalReached()) {
            ERC20Mintable _mintableToken = ERC20Mintable(address(token()));
            TokenVesting airdroppedFundVested = new TokenVesting(airdroppedFund, 1549737919, VESTING_CLIFF, VESTING_DURATION, false);
            TokenVesting advisorsFundVested = new TokenVesting(advisorsFund, 1549737919, VESTING_CLIFF, VESTING_DURATION, false);
            TokenVesting teamFundVested = new TokenVesting(teamFund, 1549737919, VESTING_CLIFF, VESTING_DURATION, false);
            TokenVesting bussinesFundVested = new TokenVesting(bussinesFund, 1549737919, VESTING_CLIFF, VESTING_DURATION, false);
            TokenVesting reserveFundVested = new TokenVesting(reserveFund, 1549737919, VESTING_CLIFF, VESTING_DURATION, false);
            _mintableToken.mint(address(airdroppedFundVested), airdroppedFundDistribution * (10**6) * 10**18);
            _mintableToken.mint(address(advisorsFundVested), advisorsFundDistribution * (10**6) * 10**18);
            _mintableToken.mint(address(teamFundVested), teamFundDistribution * (10**6) * 10**18);
            _mintableToken.mint(address(bussinesFundVested), bussinesFundDistribution * (10**6) * 10**18);
            _mintableToken.mint(address(reserveFundVested), reserveFundDistribution * (10**6) * 10**18);
            emit MintFullTeamDone();
        }
    }

    /**
      * @dev called when owner calls finalize(), calls mintFullTeam()
      * Requires mintin role
    */
    function _finalization() internal {
        if(goalReached()) {
            mintFullTeam();
        }
        super._finalization();
    }
}

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Detailed.sol

/**
 * @title ERC20Detailed token
 * @dev The decimals are only for visualization purposes.
 * All the operations are done using the smallest and indivisible token unit,
 * just as on Ethereum all the operations are done in wei.
 */
contract ERC20Detailed is IERC20 {
    string private _name;
    string private _symbol;
    uint8 private _decimals;

    constructor (string memory name, string memory symbol, uint8 decimals) public {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }

    /**
     * @return the name of the token.
     */
    function name() public view returns (string memory) {
        return _name;
    }

    /**
     * @return the symbol of the token.
     */
    function symbol() public view returns (string memory) {
        return _symbol;
    }

    /**
     * @return the number of decimals of the token.
     */
    function decimals() public view returns (uint8) {
        return _decimals;
    }
}

// File: contracts/WiseToken.sol

contract WiseToken is  ERC20, ERC20Detailed, ERC20Mintable, ERC20Pausable, Ownable{
    constructor () public ERC20Detailed("WISE TOKEN", "WSE", 18) {
    }
}

// File: contracts/Migrations.sol

contract Migrations {
    address public owner;
    uint public last_completed_migration;

    constructor() public {
        owner = msg.sender;
    }

    modifier restricted() {
        if (msg.sender == owner) _;
    }

    function setCompleted(uint completed) public restricted {
        last_completed_migration = completed;
    }

    function upgrade(address new_address) public restricted {
        Migrations upgraded = Migrations(new_address);
        upgraded.setCompleted(last_completed_migration);
    }
}