// Vulnerability label: LE_TimeO
pragma solidity ^ 0.4 .23;
/**
 * @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) {
        if (a == 0) {
            return 0;
        }
        uint256 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 c;
    }
    /**
     * @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) {
        uint256 c = a + b;
        assert(c >= a);
        return c;
    }
}
/**
 * @title Pausable
 * @dev Base contract which allows children to implement an emergency stop mechanism.
 */
contract Ownable {
    address public 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() 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 transfer control of the contract to a newOwner.
     * @param newOwner The address to transfer ownership to.
     */
    function transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0));
        emit OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }
}


contract Pausable is Ownable {
    event Pause();
    event Unpause();
    bool public paused = false;
    /**
     * @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() onlyOwner whenNotPaused public {
        paused = true;
        emit Pause();
    }
    /**
     * @dev called by the owner to unpause, returns to normal state
     */
    function unpause() onlyOwner whenPaused public {
        paused = false;
        emit Unpause();
    }
}
contract Controlled is Pausable {
    /// @notice The address of the controller is the only address that can call
    ///  a function with this modifier
    modifier onlyController {
        require(msg.sender == controller);
        _;
    }
    modifier onlyControllerorOwner {
        require((msg.sender == controller) || (msg.sender == owner));
        _;
    }
    address public controller;
    constructor() public {
        controller = msg.sender;
    }
    /// @notice Changes the controller of the contract
    /// @param _newController The new controller of the contract
    function changeController(address _newController) public onlyControllerorOwner {
        controller = _newController;
    }
}
contract TokenController {
    /// @notice Called when `_owner` sends ether to the MiniMe Token contract
    /// @param _owner The address that sent the ether to create tokens
    /// @return True if the ether is accepted, false if it throws
    function proxyPayment(address _owner) public payable returns(bool);
    /// @notice Notifies the controller about a token transfer allowing the
    ///  controller to react if desired
    /// @param _from The origin of the transfer
    /// @param _to The destination of the transfer
    /// @param _amount The amount of the transfer
    /// @return False if the controller does not authorize the transfer
    function onTransfer(address _from, address _to, uint _amount) public returns(bool);
    /// @notice Notifies the controller about an approval allowing the
    ///  controller to react if desired
    /// @param _owner The address that calls `approve()`
    /// @param _spender The spender in the `approve()` call
    /// @param _amount The amount in the `approve()` call
    /// @return False if the controller does not authorize the approval
    function onApprove(address _owner, address _spender, uint _amount) public
    returns(bool);
}
/// @dev The actual token contract, the default controller is the msg.sender
///  that deploys the contract, so usually this token will be deployed by a
///  token controller contract, which Giveth will call a "Campaign"
contract MiniMeToken is Controlled {
    using SafeMath
    for uint256;
    string public name; //The Token's name: e.g. DigixDAO Tokens
    uint8 public decimals; //Number of decimals of the smallest unit
    string public symbol; //An identifier: e.g. REP
    string public version = 'V 1.0'; //An arbitrary versioning scheme
    /// @dev `Checkpoint` is the structure that attaches a block number to a
    ///  given value, the block number attached is the one that last changed the
    ///  value
    struct Checkpoint {
        // `fromBlock` is the block number that the value was generated from
        uint128 fromBlock;
        // `value` is the amount of tokens at a specific block number
        uint128 value;
    }
    // `parentToken` is the Token address that was cloned to produce this token;
    //  it will be 0x0 for a token that was not cloned
    MiniMeToken public parentToken;
    // `parentSnapShotBlock` is the block number from the Parent Token that was
    //  used to determine the initial distribution of the Clone Token
    uint public parentSnapShotBlock;
    // `creationBlock` is the block number that the Clone Token was created
    uint public creationBlock;
    // `balances` is the map that tracks the balance of each address, in this
    //  contract when the balance changes the block number that the change
    //  occurred is also included in the map
    mapping(address => Checkpoint[]) balances;
    // `allowed` tracks any extra transfer rights as in all ERC20 tokens
    mapping(address => mapping(address => uint256)) allowed;
    // Tracks the history of the `totalSupply` of the token
    Checkpoint[] totalSupplyHistory;
    // Flag that determines if the token is transferable or not.
    bool public transfersEnabled;
    // The factory used to create new clone tokens
    MiniMeTokenFactory public tokenFactory;
    ////////////////
    // Constructor
    ////////////////
    /// @notice Constructor to create a MiniMeToken
    /// @param _tokenFactory The address of the MiniMeTokenFactory contract that
    ///  will create the Clone token contracts, the token factory needs to be
    ///  deployed first
    /// @param _parentToken Address of the parent token, set to 0x0 if it is a
    ///  new token
    /// @param _parentSnapShotBlock Block of the parent token that will
    ///  determine the initial distribution of the clone token, set to 0 if it
    ///  is a new token
    /// @param _tokenName Name of the new token
    /// @param _decimalUnits Number of decimals of the new token
    /// @param _tokenSymbol Token Symbol for the new token
    /// @param _transfersEnabled If true, tokens will be able to be transferred
    constructor(
        address _tokenFactory,
        address _parentToken,
        uint _parentSnapShotBlock,
        string _tokenName,
        uint8 _decimalUnits,
        string _tokenSymbol,
        bool _transfersEnabled
    ) public {
        tokenFactory = MiniMeTokenFactory(_tokenFactory);
        name = _tokenName; // Set the name
        decimals = _decimalUnits; // Set the decimals
        symbol = _tokenSymbol; // Set the symbol
        parentToken = MiniMeToken(_parentToken);
        parentSnapShotBlock = _parentSnapShotBlock;
        transfersEnabled = _transfersEnabled;
        creationBlock = block.number;
    }
    ///////////////////
    // ERC20 Methods
    ///////////////////
    /// @notice Send `_amount` tokens to `_to` from `msg.sender`
    /// @param _to The address of the recipient
    /// @param _amount The amount of tokens to be transferred
    /// @return Whether the transfer was successful or not
    function transfer(address _to, uint256 _amount) public returns(bool success) {
        require(transfersEnabled);
        doTransfer(msg.sender, _to, _amount);
        return true;
    }
    /// @notice Send `_amount` tokens to `_to` from `_from` on the condition it
    ///  is approved by `_from`
    /// @param _from The address holding the tokens being transferred
    /// @param _to The address of the recipient
    /// @param _amount The amount of tokens to be transferred
    /// @return True if the transfer was successful
    function transferFrom(address _from, address _to, uint256 _amount) public returns(bool success) {
        // The controller of this contract can move tokens around at will,
        //  this is important to recognize! Confirm that you trust the
        //  controller of this contract, which in most situations should be
        //  another open source smart contract or 0x0
        if (msg.sender != controller) {
            require(transfersEnabled);
            // The standard ERC 20 transferFrom functionality
            require(allowed[_from][msg.sender] >= _amount);
            allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
        }
        doTransfer(_from, _to, _amount);
        return true;
    }
    /// @dev This is the actual transfer function in the token contract, it can
    ///  only be called by other functions in this contract.
    /// @param _from The address holding the tokens being transferred
    /// @param _to The address of the recipient
    /// @param _amount The amount of tokens to be transferred
    /// @return True if the transfer was successful
    function doTransfer(address _from, address _to, uint _amount) internal {
        if (_amount == 0) {
            emit Transfer(_from, _to, _amount); // Follow the spec to louch the event when transfer 0
            return;
        }
        // Do not allow transfer to 0x0 or the token contract itself
        require((_to != 0) && (_to != address(this)));
        // If the amount being transfered is more than the balance of the
        //  account the transfer throws
        uint256 previousBalanceFrom = balanceOfAt(_from, block.number);
        require(previousBalanceFrom >= _amount);
        //  sending the tokens
        updateValueAtNow(balances[_from], previousBalanceFrom - _amount);
        // Then update the balance array with the new value for the address
        //  receiving the tokens
        uint256 previousBalanceTo = balanceOfAt(_to, block.number);
        require(previousBalanceTo.add(_amount) >= previousBalanceTo); // Check for overflow
        updateValueAtNow(balances[_to], previousBalanceTo.add(_amount));
        // An event to make the transfer easy to find on the blockchain
        emit Transfer(_from, _to, _amount);
    }
    /// @param _owner The address that's balance is being requested
    /// @return The balance of `_owner` at the current block
    function balanceOf(address _owner) public constant returns(uint256 balance) {
        return balanceOfAt(_owner, block.number);
    }
    /// @notice `msg.sender` approves `_spender` to spend `_amount` tokens on
    ///  its behalf. This is a modified version of the ERC20 approve function
    ///  to be a little bit safer
    /// @param _spender The address of the account able to transfer the tokens
    /// @param _amount The amount of tokens to be approved for transfer
    /// @return True if the approval was successful
    function approve(address _spender, uint256 _amount) public returns(bool success) {
        require(transfersEnabled);
        // To change the approve amount you first have to reduce the addresses`
        //  allowance to zero by calling `approve(_spender,0)` if it is not
        //  already 0 to mitigate the race condition described here:
        //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
        require((_amount == 0) || (allowed[msg.sender][_spender] == 0));
        //  Alerts the token controller of the approve function call
        if (isContract(controller)) {
            require(TokenController(controller).onApprove(msg.sender, _spender, _amount));
        }
        allowed[msg.sender][_spender] = _amount;
        emit Approval(msg.sender, _spender, _amount);
        return true;
    }
    /// @dev This function makes it easy to read the `allowed[]` map
    /// @param _owner The address of the account that owns the token
    /// @param _spender The address of the account able to transfer the tokens
    /// @return Amount of remaining tokens of _owner that _spender is allowed
    ///  to spend
    function allowance(address _owner, address _spender) public constant returns(uint256 remaining) {
        return allowed[_owner][_spender];
    }
    /// @notice `msg.sender` approves `_spender` to send `_amount` tokens on
    ///  its behalf, and then a function is triggered in the contract that is
    ///  being approved, `_spender`. This allows users to use their tokens to
    ///  interact with contracts in one function call instead of two
    /// @param _spender The address of the contract able to transfer the tokens
    /// @param _amount The amount of tokens to be approved for transfer
    /// @return True if the function call was successful
    function approveAndCall(address _spender, uint256 _amount, bytes _extraData) public returns(bool success) {
        require(approve(_spender, _amount));
        ApproveAndCallFallBack(_spender).receiveApproval(
            msg.sender,
            _amount,
            this,
            _extraData
        );
        return true;
    }
    /// @dev This function makes it easy to get the total number of tokens
    /// @return The total number of tokens
    function totalSupply() public constant returns(uint) {
        return totalSupplyAt(block.number);
    }
    ////////////////
    // Query balance and totalSupply in History
    ////////////////
    /// @dev Queries the balance of `_owner` at a specific `_blockNumber`
    /// @param _owner The address from which the balance will be retrieved
    /// @param _blockNumber The block number when the balance is queried
    /// @return The balance at `_blockNumber`
    function balanceOfAt(address _owner, uint _blockNumber) public constant
    returns(uint) {
        // These next few lines are used when the balance of the token is
        //  requested before a check point was ever created for this token, it
        //  requires that the `parentToken.balanceOfAt` be queried at the
        //  genesis block for that token as this contains initial balance of
        //  this token
        if ((balances[_owner].length == 0) ||
            (balances[_owner][0].fromBlock > _blockNumber)) {
            if (address(parentToken) != 0) {
                return parentToken.balanceOfAt(_owner, min(_blockNumber, parentSnapShotBlock));
            } else {
                // Has no parent
                return 0;
            }
            // This will return the expected balance during normal situations
        } else {
            return getValueAt(balances[_owner], _blockNumber);
        }
    }
    /// @notice Total amount of tokens at a specific `_blockNumber`.
    /// @param _blockNumber The block number when the totalSupply is queried
    /// @return The total amount of tokens at `_blockNumber`
    function totalSupplyAt(uint _blockNumber) public constant returns(uint) {
        // These next few lines are used when the totalSupply of the token is
        //  requested before a check point was ever created for this token, it
        //  requires that the `parentToken.totalSupplyAt` be queried at the
        //  genesis block for this token as that contains totalSupply of this
        //  token at this block number.
        if ((totalSupplyHistory.length == 0) ||
            (totalSupplyHistory[0].fromBlock > _blockNumber)) {
            if (address(parentToken) != 0) {
                return parentToken.totalSupplyAt(min(_blockNumber, parentSnapShotBlock));
            } else {
                return 0;
            }
            // This will return the expected totalSupply during normal situations
        } else {
            return getValueAt(totalSupplyHistory, _blockNumber);
        }
    }
    ////////////////
    // Generate and destroy tokens
    ////////////////
    /// @notice Generates `_amount` tokens that are assigned to `_owner`
    /// @param _owner The address that will be assigned the new tokens
    /// @param _amount The quantity of tokens generated
    /// @return True if the tokens are generated correctly
    function generateTokens(address _owner, uint _amount) public onlyControllerorOwner whenNotPaused returns(bool) {
        uint curTotalSupply = totalSupply();
        require(curTotalSupply.add(_amount) >= curTotalSupply); // Check for overflow
        uint previousBalanceTo = balanceOf(_owner);
        require(previousBalanceTo.add(_amount) >= previousBalanceTo); // Check for overflow
        updateValueAtNow(totalSupplyHistory, curTotalSupply.add(_amount));
        updateValueAtNow(balances[_owner], previousBalanceTo.add(_amount));
        emit Transfer(0, _owner, _amount);
        return true;
    }
    /// @notice Burns `_amount` tokens from `_owner`
    /// @param _owner The address that will lose the tokens
    /// @param _amount The quantity of tokens to burn
    /// @return True if the tokens are burned correctly
    function destroyTokens(address _owner, uint _amount) onlyControllerorOwner public returns(bool) {
        uint curTotalSupply = totalSupply();
        require(curTotalSupply >= _amount);
        uint previousBalanceFrom = balanceOf(_owner);
        require(previousBalanceFrom >= _amount);
        updateValueAtNow(totalSupplyHistory, curTotalSupply.sub(_amount));
        updateValueAtNow(balances[_owner], previousBalanceFrom.sub(_amount));
        emit Transfer(_owner, 0, _amount);
        return true;
    }
    ////////////////
    // Enable tokens transfers
    ////////////////
    /// @notice Enables token holders to transfer their tokens freely if true
    /// @param _transfersEnabled True if transfers are allowed in the clone
    function enableTransfers(bool _transfersEnabled) public onlyControllerorOwner {
        transfersEnabled = _transfersEnabled;
    }
    ////////////////
    // Internal helper functions to query and set a value in a snapshot array
    ////////////////
    /// @dev `getValueAt` retrieves the number of tokens at a given block number
    /// @param checkpoints The history of values being queried
    /// @param _block The block number to retrieve the value at
    /// @return The number of tokens being queried
    function getValueAt(Checkpoint[] storage checkpoints, uint _block) constant internal returns(uint) {
        if (checkpoints.length == 0) return 0;
        // Shortcut for the actual value
        if (_block >= checkpoints[checkpoints.length.sub(1)].fromBlock)
            return checkpoints[checkpoints.length.sub(1)].value;
        if (_block < checkpoints[0].fromBlock) return 0;
        // Binary search of the value in the array
        uint min = 0;
        uint max = checkpoints.length.sub(1);
        while (max > min) {
            uint mid = (max.add(min).add(1)).div(2);
            if (checkpoints[mid].fromBlock <= _block) {
                min = mid;
            } else {
                max = mid.sub(1);
            }
        }
        return checkpoints[min].value;
    }
    /// @dev `updateValueAtNow` used to update the `balances` map and the
    ///  `totalSupplyHistory`
    /// @param checkpoints The history of data being updated
    /// @param _value The new number of tokens
    function updateValueAtNow(Checkpoint[] storage checkpoints, uint _value) internal {
        if ((checkpoints.length == 0) ||
            (checkpoints[checkpoints.length.sub(1)].fromBlock < block.number)) {
            Checkpoint storage newCheckPoint = checkpoints[checkpoints.length++];
            newCheckPoint.fromBlock = uint128(block.number);
            newCheckPoint.value = uint128(_value);
        } else {
            Checkpoint storage oldCheckPoint = checkpoints[checkpoints.length.sub(1)];
            oldCheckPoint.value = uint128(_value);
        }
    }
    /// @dev Internal function to determine if an address is a contract
    /// @param _addr The address being queried
    /// @return True if `_addr` is a contract
    function isContract(address _addr) constant internal returns(bool) {
        uint size;
        if (_addr == 0) return false;
        assembly {
            size: = extcodesize(_addr)
        }
        return size > 0;
    }
    /// @dev Helper function to return a min betwen the two uints
    function min(uint a, uint b) pure internal returns(uint) {
        return a < b ? a : b;
    }
    /// @notice The fallback function: If the contract's controller has not been
    ///  set to 0, then the `proxyPayment` method is called which relays the
    ///  ether and creates tokens as described in the token controller contract
    function() public payable {
        /*require(isContract(controller));
        require(TokenController(controller).proxyPayment.value(msg.value)(msg.sender));*/
        revert();
    }
    //////////
    // Safety Methods
    //////////
    /// @notice This method can be used by the controller to extract mistakenly
    ///  sent tokens to this contract.
    /// @param _token The address of the token contract that you want to recover
    ///  set to 0 in case you want to extract ether.
    function claimTokens(address _token) public onlyControllerorOwner {
        if (_token == 0x0) {
            controller.transfer(address(this).balance);
            return;
        }
        MiniMeToken token = MiniMeToken(_token);
        uint balance = token.balanceOf(this);
        token.transfer(controller, balance);
        emit ClaimedTokens(_token, controller, balance);
    }
    ////////////////
    // Events
    ////////////////
    event ClaimedTokens(address indexed _token, address indexed _controller, uint _amount);
    event Transfer(address indexed _from, address indexed _to, uint256 _amount);
    event NewCloneToken(address indexed _cloneToken, uint _snapshotBlock);
    event Approval(
        address indexed _owner,
        address indexed _spender,
        uint256 _amount
    );
}
/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev 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);
}
contract ApproveAndCallFallBack {
    function receiveApproval(address from, uint256 _amount, address _token, bytes _data) public;
}

contract EmaToken is MiniMeToken {
    constructor(address tokenfactory, address parenttoken, uint parentsnapshot, string tokenname, uint8 dec, string tokensymbol, bool transfersenabled)
    MiniMeToken(tokenfactory, parenttoken, parentsnapshot, tokenname, dec, tokensymbol, transfersenabled) public {}
}
/**
 * @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);
}

/**
 * @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 / overriden.
 * The internal interface conforms the extensible and modifiable surface of crowdsales. Override
 * the methods to add functionality. Consider using 'super' where appropiate to concatenate
 * behavior.
 */

////////////////
// MiniMeTokenFactory
////////////////
/// @dev This contract is used to generate clone contracts from a contract.
///  In solidity this is the way to create a contract from a contract of the
///  same class
contract MiniMeTokenFactory {
    /// @notice Update the DApp by creating a new token with new functionalities
    ///  the msg.sender becomes the controller of this clone token
    /// @param _parentToken Address of the token being cloned
    /// @param _snapshotBlock Block of the parent token that will
    ///  determine the initial distribution of the clone token
    /// @param _tokenName Name of the new token
    /// @param _decimalUnits Number of decimals of the new token
    /// @param _tokenSymbol Token Symbol for the new token
    /// @param _transfersEnabled If true, tokens will be able to be transferred
    /// @return The address of the new token contract
    function createCloneToken(
        address _parentToken,
        uint _snapshotBlock,
        string _tokenName,
        uint8 _decimalUnits,
        string _tokenSymbol,
        bool _transfersEnabled
    ) public returns(MiniMeToken) {
        MiniMeToken newToken = new MiniMeToken(
            this,
            _parentToken,
            _snapshotBlock,
            _tokenName,
            _decimalUnits,
            _tokenSymbol,
            _transfersEnabled
        );
        newToken.changeController(msg.sender);
        return newToken;
    }
}

contract Crowdsale is Pausable {
    using SafeMath
    for uint256;
    // The token being sold
    MiniMeToken public token;
    // Address where funds are collected
    address public wallet;
    // How many token units a buyer gets per wei
    uint256 public rate = 6120;
    // Amount of tokens sold
    uint256 public tokensSold;
    uint256 public allCrowdSaleTokens = 255000000000000000000000000; //255M tokens available for crowdsale
    /**
     * 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 TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
    event buyx(address buyer, address contractAddr, uint256 amount);
    constructor(address _wallet, MiniMeToken _token) public {
        require(_wallet != address(0));
        require(_token != address(0));
        wallet = _wallet;
        token = _token;
    }

    function setCrowdsale(address _wallet, MiniMeToken _token) internal {
        require(_wallet != address(0));
        require(_token != address(0));
        wallet = _wallet;
        token = _token;
    }
    // -----------------------------------------
    // Crowdsale external interface
    // -----------------------------------------
    /**
     *  fallback function ***DO NOT OVERRIDE***
     */
    function() external whenNotPaused payable {
        emit buyx(msg.sender, this, _getTokenAmount(msg.value));
        buyTokens(msg.sender);
    }
    /**
     * @dev low level token purchase ***DO NOT OVERRIDE***
     * @param _beneficiary Address performing the token purchase
     */
    function buyTokens(address _beneficiary) public whenNotPaused payable {
        if ((msg.value >= 500000000000000000000) && (msg.value < 1000000000000000000000)) {
            rate = 7140;
        } else if (msg.value >= 1000000000000000000000) {
            rate = 7650;
        } else if (tokensSold <= 21420000000000000000000000) {

            rate = 6120;
        } else if ((tokensSold > 21420000000000000000000000) && (tokensSold <= 42304500000000000000000000)) {

            rate = 5967;
        } else if ((tokensSold > 42304500000000000000000000) && (tokensSold <= 73095750000000000000000000)) {

            rate = 5865;
        } else if ((tokensSold > 73095750000000000000000000) && (tokensSold <= 112365750000000000000000000)) {

            rate = 5610;
        } else if ((tokensSold > 112365750000000000000000000) && (tokensSold <= 159222000000000000000000000)) {

            rate = 5355;
        } else if (tokensSold > 159222000000000000000000000) {

            rate = 5100;
        }
        uint256 weiAmount = msg.value;
        uint256 tokens = _getTokenAmount(weiAmount);
        _processPurchase(_beneficiary, tokens);
        emit TokenPurchase(msg.sender, _beneficiary, weiAmount, tokens);
        _updatePurchasingState(_beneficiary, weiAmount);
        _forwardFunds();
        _postValidatePurchase(_beneficiary, weiAmount);
        tokensSold = allCrowdSaleTokens.sub(token.balanceOf(this));
    }
    // -----------------------------------------
    // Internal interface (extensible)
    // -----------------------------------------
    /**
     * @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met. Use super to concatenate validations.
     * @param _beneficiary Address performing the token purchase
     * @param _weiAmount Value in wei involved in the purchase
     */
    function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
        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 {
        // optional override
    }
    /**
     * @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.transfer(_beneficiary, _tokenAmount);
    }
    /**
     * @dev Executed when a purchase has been validated and is ready to be executed. Not necessarily emits/sends 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 {
        // optional override
    }
    /**
     * @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 returns(uint256) {

        return _weiAmount.mul(rate);
    }
    /**
     * @dev Determines how ETH is stored/forwarded on purchases.
     */
    function _forwardFunds() internal {
        wallet.transfer(msg.value);
    }
}
contract EmaCrowdSale is Crowdsale {
    using SafeMath
    for uint256;
    constructor(address wallet, MiniMeToken token) Crowdsale(wallet, token) public {
        setCrowdsale(wallet, token);
    }

    function tranferPresaleTokens(address investor, uint256 ammount) public onlyOwner {
        tokensSold = tokensSold.add(ammount);
        token.transferFrom(this, investor, ammount);
    }

    function setTokenTransferState(bool state) public onlyOwner {
        token.changeController(this);
        token.enableTransfers(state);
    }

    function claim(address claimToken) public onlyOwner {
        token.changeController(this);
        token.claimTokens(claimToken);
    }

    function() external payable whenNotPaused {
        emit buyx(msg.sender, this, _getTokenAmount(msg.value));
        buyTokens(msg.sender);
    }
}