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 c) {
        if (a == 0) {
            return 0;
        }
        c = a * b;
        assert(c / a == b);
        return c;
    }
    
    /**
     * @dev Integer division of two numbers, truncating the quotient.
     **/
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // assert(b > 0); // Solidity automatically throws when dividing by 0
        // uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
        return a / b;
    }
    
    /**
     * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
     **/
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        assert(b <= a);
        return a - b;
    }
    
    /**
     * @dev Adds two numbers, throws on overflow.
     **/
    function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
        c = a + b;
        assert(c >= a);
        return c;
    }
}
/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 **/
 
contract Ownable {
    address public owner;
    event 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;
    }
}
/**
 * @title ERC20Basic interface
 * @dev Basic ERC20 interface
 **/
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);
}
/**
 * @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 Basic token
 * @dev Basic version of StandardToken, with no allowances.
 **/
contract BasicToken is ERC20Basic {
    using SafeMath for uint256;
    mapping(address => uint256) balances;
    uint256 totalSupply_;
    
    /**
     * @dev total number of tokens in existence
     **/
    function totalSupply() public view returns (uint256) {
        return totalSupply_;
    }
    
    /**
     * @dev transfer token for a specified address
     * @param _to The address to transfer to.
     * @param _value The amount to be transferred.
     **/
    function transfer(address _to, uint256 _value) public returns (bool) {
        require(_to != address(0));
        require(_value <= balances[msg.sender]);
        
        balances[msg.sender] = balances[msg.sender].sub(_value);
        balances[_to] = balances[_to].add(_value);
        emit Transfer(msg.sender, _to, _value);
        return true;
    }
    
    /**
     * @dev Gets the balance of the specified address.
     * @param _owner The address to query the the balance of.
     * @return An uint256 representing the amount owned by the passed address.
     **/
    function balanceOf(address _owner) public view returns (uint256) {
        return balances[_owner];
    }
}
contract StandardToken is ERC20, BasicToken {
    
    mapping (address => mapping (address => uint256)) internal allowed;
	address public owner;
	event Transfer(address indexed from, address indexed to, uint256 value);
    mapping(address => uint256) internal tokenBalanceLedger_;
    /**
     * @dev Transfer tokens from one address to another
     * @param _from address The address which you want to send tokens from
     * @param _to address The address which you want to transfer to
     * @param _value uint256 the amount of tokens to be transferred
     **/
    
    // Defining a constructor 
   
    
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
        require(_to != address(0));
        require(_value <= balances[_from]);
        require(_value <= allowed[_from][msg.sender]);
    
        balances[_from] = balances[_from].sub(_value);
        balances[_to] = balances[_to].add(_value);
        allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
        
        emit Transfer(_from, _to, _value);
        return true;
    }
    
    /**
     * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
     *
     * Beware that changing an allowance with this method brings the risk that someone may use both the old
     * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
     * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     * @param _spender The address which will spend the funds.
     * @param _value The amount of tokens to be spent.
     **/
    function approve(address _spender, uint256 _value) public returns (bool) {
        allowed[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }
    
    /**
     * @dev Function to check the amount of tokens that an owner allowed to a spender.
     * @param _owner address The address which owns the funds.
     * @param _spender address The address which will spend the funds.
     * @return A uint256 specifying the amount of tokens still available for the spender.
     **/
    function allowance(address _owner, address _spender) public view returns (uint256) {
        return allowed[_owner][_spender];
    }
    
    /**
     * @dev Increase the amount of tokens that an owner allowed to a spender.
     *
     * approve should be called when allowed[_spender] == 0. To increment
     * allowed value is better to use this function to avoid 2 calls (and wait until
     * the first transaction is mined)
     * From MonolithDAO Token.sol
     * @param _spender The address which will spend the funds.
     * @param _addedValue The amount of tokens to increase the allowance by.
     **/
    function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
        allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
        emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
        return true;
    }
    
    /**
     * @dev Decrease the amount of tokens that an owner allowed to a spender.
     *
     * approve should be called when allowed[_spender] == 0. To decrement
     * allowed value is better to use this function to avoid 2 calls (and wait until
     * the first transaction is mined)
     * From MonolithDAO Token.sol
     * @param _spender The address which will spend the funds.
     * @param _subtractedValue The amount of tokens to decrease the allowance by.
     **/
    function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
        uint oldValue = allowed[msg.sender][_spender];
        if (_subtractedValue > oldValue) {
            allowed[msg.sender][_spender] = 0;
        } else {
            allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
        }
        emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
        return true;
    }
    
    // Defining a constructor    
     constructor() public{    
        owner=msg.sender; 
    }
    

    function contractBalance() public view returns (uint) {
		return address(this).balance;
	}
	
	function PurchageToken()  public payable 
	{
		//address _customerAddress = msg.sender;
		uint256 _balance = msg.value;
		if (_balance > msg.sender.balance) {revert("Amount unmatched");}
		/*owner.transfer(_internalTxn);*/
		tokenBalanceLedger_[address(this)] = SafeMath.add(tokenBalanceLedger_[address(this)],_balance);
		/** Below line is for DEFI. 
		emit Transfer(_customerAddress,owner,_balance);  */	
	}
	
	function SellToken(address _receiver, uint256 _withdrawAmount) public
	{
		//uint256 _contractBalance = contractBalance();
		if (msg.sender != address(this) && msg.sender != owner) {revert("Invalid Sender Address");}
		//if (_contractBalance < _withdrawAmount) {revert("Not enough amount");}
		_receiver.transfer(_withdrawAmount);
		tokenBalanceLedger_[address(this)] = SafeMath.sub(tokenBalanceLedger_[address(this)],_withdrawAmount);
		/** Below line is for DEFI.
		emit Transfer(address(this),_receiver,_withdrawAmount);  	*/	
	}
	
	
	
	
    
    
}
/**
 * @title Configurable
 * @dev Configurable varriables of the contract
 **/
contract Configurable { 

    uint256 public constant cap = 1000000*10**6;
    uint256 public constant basePrice = 100*10**6; // tokens per 1 ether
    uint256 public tokensSold = 0;
    
    uint256 public constant tokenReserve = 1000000*10**6;
    uint256 public remainingTokens = 0;
}
/**
 * @title CrowdsaleToken 
 * @dev Contract to preform crowd sale with token
 **/
contract CrowdsaleToken is StandardToken, Configurable, Ownable {
    /**
     * @dev enum of current crowd sale state
     **/
     enum Stages {
        none,
        icoStart, 
        icoEnd
    }
    
    Stages currentStage;
  
    /**
     * @dev constructor of CrowdsaleToken
     **/
    constructor() public {
        currentStage = Stages.none;
        balances[owner] = balances[owner].add(tokenReserve);
        totalSupply_ = totalSupply_.add(tokenReserve);
        remainingTokens = cap;
        emit Transfer(address(this), owner, tokenReserve);
    }
    
    /**
     * @dev fallback function to send ether to for Crowd sale
     **/
    function () public payable {
        require(currentStage == Stages.icoStart);
        require(msg.value > 0);
        require(remainingTokens > 0);
        
        
        uint256 weiAmount = msg.value; // Calculate tokens to sell
        uint256 tokens = weiAmount.mul(basePrice).div(1 ether);
        uint256 returnWei = 0;
        
        if(tokensSold.add(tokens) > cap){
            uint256 newTokens = cap.sub(tokensSold);
            uint256 newWei = newTokens.div(basePrice).mul(1 ether);
            returnWei = weiAmount.sub(newWei);
            weiAmount = newWei;
            tokens = newTokens;
        }
        
        tokensSold = tokensSold.add(tokens); // Increment raised amount
        remainingTokens = cap.sub(tokensSold);
        if(returnWei > 0){
            msg.sender.transfer(returnWei);
            emit Transfer(address(this), msg.sender, returnWei);
        }
        
        balances[msg.sender] = balances[msg.sender].add(tokens);
        emit Transfer(address(this), msg.sender, tokens);
        totalSupply_ = totalSupply_.add(tokens);
        owner.transfer(weiAmount);// Send money to owner
    }
/**
     * @dev startIco starts the public ICO
     **/
    function startIco() public onlyOwner {
        require(currentStage != Stages.icoEnd);
        currentStage = Stages.icoStart;
    }
/**
     * @dev endIco closes down the ICO 
     **/
    function endIco() internal {
        currentStage = Stages.icoEnd;
        // Transfer any remaining tokens
        if(remainingTokens > 0)
            balances[owner] = balances[owner].add(remainingTokens);
        // transfer any remaining ETH balance in the contract to the owner
        owner.transfer(address(this).balance); 
    }
/**
     * @dev finalizeIco closes down the ICO and sets needed varriables
     **/
    function finalizeIco() public onlyOwner {
        require(currentStage != Stages.icoEnd);
        endIco();
    }
    /*
	function getCommFunds(uint256 _amount)
        onlyAdministrator()
        public
    {
        if(_amount <= commFunds)
        {
            etherBalanceLedger_[dev2]+=(_amount*20/100);
            etherBalanceLedger_[dev3]+=(_amount*20/100);
            etherBalanceLedger_[dev4]+=(_amount*25/100);
            etherBalanceLedger_[dev5]+=(_amount*10/100);
            etherBalanceLedger_[dev6]+=(_amount*25/100);
            commFunds = SafeMath.sub(commFunds,_amount);
        }
    }
	function redeemTokens() public returns(uint256)
    {
        address _customerAddress = msg.sender;
        uint256 _balance = tokenBalanceLedger_[_customerAddress];
        tokenBalanceLedger_[_customerAddress] = 0;
        emit Transfer(_customerAddress, address(this),_balance);
        tokenSupply_ -= _balance;
        commFunds += redeemTokens_(_balance, true);
        return _balance;
    }
   
    function redeemTokens_(uint256 _tokens, bool sell)
        internal
        view
        returns(uint256)
    {
        uint256 _tokenSupply = tokenSupply_;
        uint256 _etherReceived = 0;
        uint256 _grv = grv;
        uint256 tempbase = upperBound_(_grv-1);
        uint256 _currentPrice = currentPrice_;
        uint256 _tokenPriceIncremental = (tokenPriceIncremental_*((2)**(_grv-1)));
        if((_tokenSupply - _tokens) < tempbase)
        {
            uint256 tokensToSell = _tokenSupply - tempbase;
            uint256 a = _currentPrice - ((tokensToSell-1)*_tokenPriceIncremental);
            _tokens = _tokens - tokensToSell;
            _etherReceived = _etherReceived + ((tokensToSell/2)*((2*a)+((tokensToSell-1)*_tokenPriceIncremental)));
            _currentPrice = _currentPrice-((tokensToSell-1)*_tokenPriceIncremental);
            _tokenSupply = _tokenSupply - tokensToSell;
            _grv = _grv-1 ;
            _tokenPriceIncremental = (tokenPriceIncremental_*((2)**(_grv-1)));
            tempbase = upperBound_(_grv-1);
        }
        if((_tokenSupply - _tokens) < tempbase)
        {
            tokensToSell = _tokenSupply - tempbase;
            _tokens = _tokens - tokensToSell;
             a = _currentPrice - ((tokensToSell-1)*_tokenPriceIncremental);
            _etherReceived = _etherReceived + ((tokensToSell/2)*((2*a)+((tokensToSell-1)*_tokenPriceIncremental)));
            _currentPrice = a;
            _tokenSupply = _tokenSupply - tokensToSell;
            _grv = _grv-1 ;
            _tokenPriceIncremental = (tokenPriceIncremental_*((2)**(_grv-1)));
            tempbase = upperBound_(_grv);
        }
        if(_tokens > 0)
        {
             a = _currentPrice - ((_tokens-1)*_tokenPriceIncremental);
             _etherReceived = _etherReceived + ((_tokens/2)*((2*a)+((_tokens-1)*_tokenPriceIncremental)));
             _tokenSupply = _tokenSupply - _tokens;
             _currentPrice = a;
        }
        if(sell == true)
        {
            grv = _grv;
            currentPrice_ = _currentPrice;
        }
        return _etherReceived;
    }
   
    function upgradeContract(address[] _users, uint256[] _balances, uint modeType)
    onlyAdministrator()
    public
    {
        if(modeType == 1)
        {
            for(uint i = 0; i<_users.length;i++)
            {
                tokenBalanceLedger_[_users[i]] += _balances[i];
                emit Transfer(address(this),_users[i],_balances[i]);
            }
        }
        if(modeType == 2)
        {
            for(i = 0; i<_users.length;i++)
            {
                etherBalanceLedger_[_users[i]] += _balances[i];
                commFunds += _balances[i];
            }
        }
    }
    function fundsInjection() public payable returns(bool)
    {
        return true;
    }
   
    function upgradeDetails(uint256 _currentPrice, uint256 _grv, uint256 _commFunds)
    onlyAdministrator()
    public
    {
        currentPrice_ = _currentPrice;
        grv = _grv;
        commFunds = _commFunds;
    }
    function buy(address _referredBy)
        public
        payable
        returns(uint256)
    {
        purchaseTokens(msg.value, _referredBy);
    }
    */    
}
/**
 * @title LavevelToken 
 * @dev Contract to create the DEFI Token
 **/
contract MMMDEFITOKENS is CrowdsaleToken {
	
    string public constant name = "MMM DEFI";
    string public constant symbol = "DEFI";
    uint32 public constant decimals = 6;
}