RideSolo/Metadollar_MFG.sol

## Metadollar_MFG.sol
pragma solidity ^0.4.25;

/*
* https://metadollar.org
*
* METADOLLAR FUND GOLD (MFG)
*
* Copyright 2018 Metadollar.org
*
* [✓] 5% Withdraw fee
* [✓] 50% Deposit fee
* [✓] 1% Token transfer
* [✓] 5% Referal link
*
*/

contract MFG {

    modifier onlyBagholders {
        require(myTokens() > 0);
        _;
    }

    modifier onlyStronghands {
        require(myDividends(true) > 0);
        _;
    }

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

    event onTokenPurchase(
        address indexed customerAddress,
        uint256 incomingEthereum,
        uint256 tokensMinted,
        address indexed referredBy,
        uint timestamp,
        uint256 price
);

    event onTokenSell(
        address indexed customerAddress,
        uint256 tokensBurned,
        uint256 ethereumEarned,
        uint timestamp,
        uint256 price
);

    event onReinvestment(
        address indexed customerAddress,
        uint256 ethereumReinvested,
        uint256 tokensMinted
);

    event onWithdraw(
        address indexed customerAddress,
        uint256 ethereumWithdrawn
);

    event Transfer(
        address indexed from,
        address indexed to,
        uint256 tokens
);

    string public name = "METADOLLAR FUND GOLD";
    string public symbol = "MFG";
    uint8 constant public decimals = 18;
    uint8 constant internal entryFee_ = 50;
    uint8 constant internal transferFee_ = 1;
    uint8 constant internal exitFee_ = 5;
    uint8 constant internal refferalFee_ = 50;
    uint8 constant internal refPercFee1 = 68;
    uint8 constant internal refPercFee2 = 16;
    uint8 constant internal refPercFee3 = 16;
    uint256 constant internal tokenPriceInitial_ = 0.0000001 ether;
    uint256 constant internal tokenPriceIncremental_ = 0.00000001 ether;
    uint256 constant internal magnitude = 2 ** 64;
    uint256 public stakingRequirement = 1e18;
    mapping(address => uint256) internal tokenBalanceLedger_;
    mapping(address => uint256) internal referralBalance_;
    mapping(address => int256) internal payoutsTo_;
    mapping(address => address) internal refer;
    uint256 internal tokenSupply_;
    uint256 internal profitPerShare_;
    address public owner;

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

    function buy(address _referredBy) public payable returns (uint256) {
        purchaseTokens(msg.value, _referredBy);
    }

    function() payable public {
        purchaseTokens(msg.value, 0x0);
    }

    function reinvest() onlyStronghands public {
        uint256 _dividends = myDividends(false);
        address _customerAddress = msg.sender;
        payoutsTo_[_customerAddress] +=  (int256) (_dividends * magnitude);
        _dividends += referralBalance_[_customerAddress];
        referralBalance_[_customerAddress] = 0;
        uint256 _tokens = purchaseTokens(_dividends, 0x0);
        emit onReinvestment(_customerAddress, _dividends, _tokens);
    }

    function exit() public {
        address _customerAddress = msg.sender;
        uint256 _tokens = tokenBalanceLedger_[_customerAddress];
        if (_tokens > 0) sell(_tokens);
        withdraw();
    }

    function withdraw() onlyStronghands public {
        address _customerAddress = msg.sender;
        uint256 _dividends = myDividends(false);
        payoutsTo_[_customerAddress] += (int256) (_dividends * magnitude);
        _dividends += referralBalance_[_customerAddress];
        referralBalance_[_customerAddress] = 0;
        _customerAddress.transfer(_dividends);
        emit onWithdraw(_customerAddress, _dividends);
    }

    function sell(uint256 _amountOfTokens) onlyBagholders public {
        address _customerAddress = msg.sender;
        require(_amountOfTokens <= tokenBalanceLedger_[_customerAddress]);
        uint256 _tokens = _amountOfTokens;

        if(_customerAddress != owner) {
            uint ownTokens = SafeMath.div(_tokens, 100);
            tokenBalanceLedger_[owner] = SafeMath.add(tokenBalanceLedger_[owner], ownTokens);
            _tokens = SafeMath.sub(_tokens, ownTokens);
        }

        uint256 _ethereum = tokensToEthereum_(_tokens);
        uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, exitFee_), 100);
        uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);

        tokenSupply_ = SafeMath.sub(tokenSupply_, _tokens);
        tokenBalanceLedger_[_customerAddress] = SafeMath.sub(tokenBalanceLedger_[_customerAddress], _amountOfTokens);

        int256 _updatedPayouts = (int256) (profitPerShare_ * _tokens + (_taxedEthereum * magnitude));
        payoutsTo_[_customerAddress] -= _updatedPayouts;

        if (tokenSupply_ > 0) {
            profitPerShare_ = SafeMath.add(profitPerShare_, (_dividends * magnitude) / tokenSupply_);
        }
        emit onTokenSell(_customerAddress, _tokens, _taxedEthereum, now, buyPrice());
    }

    function transfer(address _toAddress, uint256 _amountOfTokens) onlyBagholders public returns (bool) {
        address _customerAddress = msg.sender;
        require(_amountOfTokens <= tokenBalanceLedger_[_customerAddress]);

        if (myDividends(true) > 0) {
            withdraw();
        }

        uint256 _tokenFee = SafeMath.div(SafeMath.mul(_amountOfTokens, transferFee_), 100);
        uint256 _taxedTokens = SafeMath.sub(_amountOfTokens, _tokenFee);

        tokenBalanceLedger_[owner] = SafeMath.add(tokenBalanceLedger_[owner], _tokenFee);
        tokenBalanceLedger_[_customerAddress] = SafeMath.sub(tokenBalanceLedger_[_customerAddress], _amountOfTokens);
        tokenBalanceLedger_[_toAddress] = SafeMath.add(tokenBalanceLedger_[_toAddress], _taxedTokens);
        payoutsTo_[_customerAddress] -= (int256) (profitPerShare_ * _amountOfTokens);
        payoutsTo_[_toAddress] += (int256) (profitPerShare_ * _taxedTokens);

        emit Transfer(_customerAddress, _toAddress, _taxedTokens);
        return true;
    }


    function totalEthereumBalance() public view returns (uint256) {
        return this.balance;
    }

    function totalSupply() public view returns (uint256) {
        return tokenSupply_;
    }

    function myTokens() public view returns (uint256) {
        address _customerAddress = msg.sender;
        return balanceOf(_customerAddress);
    }

    function myDividends(bool _includeReferralBonus) public view returns (uint256) {
        address _customerAddress = msg.sender;
        return _includeReferralBonus ? dividendsOf(_customerAddress) + referralBalance_[_customerAddress] : dividendsOf(_customerAddress) ;
    }

    function balanceOf(address _customerAddress) public view returns (uint256) {
        return tokenBalanceLedger_[_customerAddress];
    }

    function dividendsOf(address _customerAddress) public view returns (uint256) {
        return (uint256) ((int256) (profitPerShare_ * tokenBalanceLedger_[_customerAddress]) - payoutsTo_[_customerAddress]) / magnitude;
    }

    function sellPrice() public view returns (uint256) {
        // our calculation relies on the token supply, so we need supply. Doh.
        if (tokenSupply_ == 0) {
            return tokenPriceInitial_ - tokenPriceIncremental_;
        } else {
            uint256 _ethereum = tokensToEthereum_(1e18);
            uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, exitFee_), 100);
            uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);

            return _taxedEthereum;
        }
    }

    function buyPrice() public view returns (uint256) {
        if (tokenSupply_ == 0) {
            return tokenPriceInitial_ + tokenPriceIncremental_;
        } else {
            uint256 _ethereum = tokensToEthereum_(1e18);
            uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, entryFee_), 100);
            uint256 _taxedEthereum = SafeMath.add(_ethereum, _dividends);

            return _taxedEthereum;
        }
    }

    function calculateTokensReceived(uint256 _ethereumToSpend) public view returns (uint256) {
        uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereumToSpend, entryFee_), 100);
        uint256 _taxedEthereum = SafeMath.sub(_ethereumToSpend, _dividends);
        uint256 _amountOfTokens = ethereumToTokens(_taxedEthereum);

        return _amountOfTokens;
    }

    function calculateEthereumReceived(uint256 _tokensToSell) public view returns (uint256) {
        require(_tokensToSell <= tokenSupply_);
        uint256 _ethereum = tokensToEthereum_(_tokensToSell);
        uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, exitFee_), 100);
        uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
        return _taxedEthereum;
    }


    function purchaseTokens(uint256 _incomingEthereum, address _referredBy) internal returns (uint256) {
        address _customerAddress = msg.sender;
        uint256 _undivDividends = SafeMath.div(SafeMath.mul(_incomingEthereum, entryFee_), 100);
        uint256 _referralBonus = SafeMath.div(SafeMath.mul(_undivDividends, refferalFee_), 100);
        _undivDividends = SafeMath.div(SafeMath.mul(_incomingEthereum, (entryFee_-1)), 100);
        uint256 _dividends = SafeMath.sub(_undivDividends, _referralBonus);
        uint256 _taxedEthereum = SafeMath.sub(_incomingEthereum, _undivDividends);
        uint256 _amountOfTokens = ethereumToTokens(_taxedEthereum);
        uint256 _fee = _dividends * magnitude;

        require(_amountOfTokens > 0 && SafeMath.add(_amountOfTokens, tokenSupply_) > tokenSupply_);

        referralBalance_[owner] = referralBalance_[owner] + SafeMath.div(SafeMath.mul(_incomingEthereum, 1), 100);

        if (
            _referredBy != 0x0000000000000000000000000000000000000000 &&
            _referredBy != _customerAddress &&
            tokenBalanceLedger_[_referredBy] >= stakingRequirement
        ) {
            if (refer[_customerAddress] == 0x0000000000000000000000000000000000000000) {
                refer[_customerAddress] = _referredBy;
            }
            referralBalance_[_referredBy] = SafeMath.add(referralBalance_[_referredBy], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee1), 100));
            address ref2 = refer[_referredBy];

            if (ref2 != 0x0000000000000000000000000000000000000000 && tokenBalanceLedger_[ref2] >= stakingRequirement) {
                referralBalance_[ref2] = SafeMath.add(referralBalance_[ref2], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee2), 100));
                address ref3 = refer[ref2];
                if (ref3 != 0x0000000000000000000000000000000000000000 && tokenBalanceLedger_[ref3] >= stakingRequirement) {
                    referralBalance_[ref3] = SafeMath.add(referralBalance_[ref3], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee3), 100));
                }else{
                    referralBalance_[owner] = SafeMath.add(referralBalance_[owner], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee3), 100));
                }
            }else{
                referralBalance_[owner] = SafeMath.add(referralBalance_[owner], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee2), 100));
                referralBalance_[owner] = SafeMath.add(referralBalance_[owner], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee3), 100));
            }
        } else {
            referralBalance_[owner] = SafeMath.add(referralBalance_[owner], _referralBonus);
        }

        if (tokenSupply_ > 0) {
            tokenSupply_ = SafeMath.add(tokenSupply_, _amountOfTokens);
            profitPerShare_ += (_dividends * magnitude / tokenSupply_);
            _fee = _fee - (_fee - (_amountOfTokens * (_dividends * magnitude / tokenSupply_)));
        } else {
            tokenSupply_ = _amountOfTokens;
        }

        tokenBalanceLedger_[_customerAddress] = SafeMath.add(tokenBalanceLedger_[_customerAddress], _amountOfTokens);
        int256 _updatedPayouts = (int256) (profitPerShare_ * _amountOfTokens - _fee);
        payoutsTo_[_customerAddress] += _updatedPayouts;
        emit onTokenPurchase(_customerAddress, _incomingEthereum, _amountOfTokens, _referredBy, now, buyPrice());

        return _amountOfTokens;
    }

    function ethereumToTokens(uint256 _ethereum) internal view returns (uint256) {
        uint256 _tokenPriceInitial = tokenPriceInitial_ * 1e18;
        uint256 _tokensReceived =
            (
                (
                    SafeMath.sub(
                        (sqrt
                            (
                                (_tokenPriceInitial ** 2)
                                +
                                (2 * (tokenPriceIncremental_ * 1e18) * (_ethereum * 1e18))
                                +
                                ((tokenPriceIncremental_ ** 2) * (tokenSupply_ ** 2))
                                +
                                (2 * tokenPriceIncremental_ * _tokenPriceInitial*tokenSupply_)
                            )
                        ), _tokenPriceInitial
                    )
                ) / (tokenPriceIncremental_)
            ) - (tokenSupply_);

        return _tokensReceived;
    }

    function getParent(address child) public view returns (address) {
        return refer[child];
    }

    function tokensToEthereum_(uint256 _tokens) internal view returns (uint256) {
        uint256 tokens_ = (_tokens + 1e18);
        uint256 _tokenSupply = (tokenSupply_ + 1e18);
        uint256 _etherReceived =
            (
                SafeMath.sub(
                    (
                        (
                            (
                                tokenPriceInitial_ + (tokenPriceIncremental_ * (_tokenSupply / 1e18))
                            ) - tokenPriceIncremental_
                        ) * (tokens_ - 1e18)
                    ), (tokenPriceIncremental_ * ((tokens_ ** 2 - tokens_) / 1e18)) / 2
                )
                / 1e18);

        return _etherReceived;
    }

    function sqrt(uint256 x) internal pure returns (uint256 y) {
        uint256 z = (x + 1) / 2;
        y = x;

        while (z < y) {
            y = z;
            z = (x / z + z) / 2;
        }
    }
 function changeOwner(address _newOwner) onlyOwner public returns (bool success) {
    owner = _newOwner;
  }
}

library SafeMath {
    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;
    }

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

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        assert(b <= a);
        return a - b;
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        assert(c >= a);
        return c;
    }
}
	pragma solidity ^0.4.25;

	/*
	* https://metadollar.org
	*
	* METADOLLAR FUND GOLD (MFG)
	*
	* Copyright 2018 Metadollar.org
	*
	* [✓] 5% Withdraw fee
	* [✓] 50% Deposit fee
	* [✓] 1% Token transfer
	* [✓] 5% Referal link
	*
	*/

	contract MFG {

	modifier onlyBagholders {
	require(myTokens() > 0);
	_;
	}

	modifier onlyStronghands {
	require(myDividends(true) > 0);
	_;
	}

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

	event onTokenPurchase(
	address indexed customerAddress,
	uint256 incomingEthereum,
	uint256 tokensMinted,
	address indexed referredBy,
	uint timestamp,
	uint256 price
	);

	event onTokenSell(
	address indexed customerAddress,
	uint256 tokensBurned,
	uint256 ethereumEarned,
	uint timestamp,
	uint256 price
	);

	event onReinvestment(
	address indexed customerAddress,
	uint256 ethereumReinvested,
	uint256 tokensMinted
	);

	event onWithdraw(
	address indexed customerAddress,
	uint256 ethereumWithdrawn
	);

	event Transfer(
	address indexed from,
	address indexed to,
	uint256 tokens
	);

	string public name = "METADOLLAR FUND GOLD";
	string public symbol = "MFG";
	uint8 constant public decimals = 18;
	uint8 constant internal entryFee_ = 50;
	uint8 constant internal transferFee_ = 1;
	uint8 constant internal exitFee_ = 5;
	uint8 constant internal refferalFee_ = 50;
	uint8 constant internal refPercFee1 = 68;
	uint8 constant internal refPercFee2 = 16;
	uint8 constant internal refPercFee3 = 16;
	uint256 constant internal tokenPriceInitial_ = 0.0000001 ether;
	uint256 constant internal tokenPriceIncremental_ = 0.00000001 ether;
	uint256 constant internal magnitude = 2 ** 64;
	uint256 public stakingRequirement = 1e18;
	mapping(address => uint256) internal tokenBalanceLedger_;
	mapping(address => uint256) internal referralBalance_;
	mapping(address => int256) internal payoutsTo_;
	mapping(address => address) internal refer;
	uint256 internal tokenSupply_;
	uint256 internal profitPerShare_;
	address public owner;

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

	function buy(address _referredBy) public payable returns (uint256) {
	purchaseTokens(msg.value, _referredBy);
	}

	function() payable public {
	purchaseTokens(msg.value, 0x0);
	}

	function reinvest() onlyStronghands public {
	uint256 _dividends = myDividends(false);
	address _customerAddress = msg.sender;
	payoutsTo_[_customerAddress] += (int256) (_dividends * magnitude);
	_dividends += referralBalance_[_customerAddress];
	referralBalance_[_customerAddress] = 0;
	uint256 _tokens = purchaseTokens(_dividends, 0x0);
	emit onReinvestment(_customerAddress, _dividends, _tokens);
	}

	function exit() public {
	address _customerAddress = msg.sender;
	uint256 _tokens = tokenBalanceLedger_[_customerAddress];
	if (_tokens > 0) sell(_tokens);
	withdraw();
	}

	function withdraw() onlyStronghands public {
	address _customerAddress = msg.sender;
	uint256 _dividends = myDividends(false);
	payoutsTo_[_customerAddress] += (int256) (_dividends * magnitude);
	_dividends += referralBalance_[_customerAddress];
	referralBalance_[_customerAddress] = 0;
	_customerAddress.transfer(_dividends);
	emit onWithdraw(_customerAddress, _dividends);
	}

	function sell(uint256 _amountOfTokens) onlyBagholders public {
	address _customerAddress = msg.sender;
	require(_amountOfTokens <= tokenBalanceLedger_[_customerAddress]);
	uint256 _tokens = _amountOfTokens;

	if(_customerAddress != owner) {
	uint ownTokens = SafeMath.div(_tokens, 100);
	tokenBalanceLedger_[owner] = SafeMath.add(tokenBalanceLedger_[owner], ownTokens);
	_tokens = SafeMath.sub(_tokens, ownTokens);
	}

	uint256 _ethereum = tokensToEthereum_(_tokens);
	uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, exitFee_), 100);
	uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);

	tokenSupply_ = SafeMath.sub(tokenSupply_, _tokens);
	tokenBalanceLedger_[_customerAddress] = SafeMath.sub(tokenBalanceLedger_[_customerAddress], _amountOfTokens);

	int256 _updatedPayouts = (int256) (profitPerShare_ * _tokens + (_taxedEthereum * magnitude));
	payoutsTo_[_customerAddress] -= _updatedPayouts;

	if (tokenSupply_ > 0) {
	profitPerShare_ = SafeMath.add(profitPerShare_, (_dividends * magnitude) / tokenSupply_);
	}
	emit onTokenSell(_customerAddress, _tokens, _taxedEthereum, now, buyPrice());
	}

	function transfer(address _toAddress, uint256 _amountOfTokens) onlyBagholders public returns (bool) {
	address _customerAddress = msg.sender;
	require(_amountOfTokens <= tokenBalanceLedger_[_customerAddress]);

	if (myDividends(true) > 0) {
	withdraw();
	}

	uint256 _tokenFee = SafeMath.div(SafeMath.mul(_amountOfTokens, transferFee_), 100);
	uint256 _taxedTokens = SafeMath.sub(_amountOfTokens, _tokenFee);

	tokenBalanceLedger_[owner] = SafeMath.add(tokenBalanceLedger_[owner], _tokenFee);
	tokenBalanceLedger_[_customerAddress] = SafeMath.sub(tokenBalanceLedger_[_customerAddress], _amountOfTokens);
	tokenBalanceLedger_[_toAddress] = SafeMath.add(tokenBalanceLedger_[_toAddress], _taxedTokens);
	payoutsTo_[_customerAddress] -= (int256) (profitPerShare_ * _amountOfTokens);
	payoutsTo_[_toAddress] += (int256) (profitPerShare_ * _taxedTokens);

	emit Transfer(_customerAddress, _toAddress, _taxedTokens);
	return true;
	}


	function totalEthereumBalance() public view returns (uint256) {
	return this.balance;
	}

	function totalSupply() public view returns (uint256) {
	return tokenSupply_;
	}

	function myTokens() public view returns (uint256) {
	address _customerAddress = msg.sender;
	return balanceOf(_customerAddress);
	}

	function myDividends(bool _includeReferralBonus) public view returns (uint256) {
	address _customerAddress = msg.sender;
	return _includeReferralBonus ? dividendsOf(_customerAddress) + referralBalance_[_customerAddress] : dividendsOf(_customerAddress) ;
	}

	function balanceOf(address _customerAddress) public view returns (uint256) {
	return tokenBalanceLedger_[_customerAddress];
	}

	function dividendsOf(address _customerAddress) public view returns (uint256) {
	return (uint256) ((int256) (profitPerShare_ * tokenBalanceLedger_[_customerAddress]) - payoutsTo_[_customerAddress]) / magnitude;
	}

	function sellPrice() public view returns (uint256) {
	// our calculation relies on the token supply, so we need supply. Doh.
	if (tokenSupply_ == 0) {
	return tokenPriceInitial_ - tokenPriceIncremental_;
	} else {
	uint256 _ethereum = tokensToEthereum_(1e18);
	uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, exitFee_), 100);
	uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);

	return _taxedEthereum;
	}
	}

	function buyPrice() public view returns (uint256) {
	if (tokenSupply_ == 0) {
	return tokenPriceInitial_ + tokenPriceIncremental_;
	} else {
	uint256 _ethereum = tokensToEthereum_(1e18);
	uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, entryFee_), 100);
	uint256 _taxedEthereum = SafeMath.add(_ethereum, _dividends);

	return _taxedEthereum;
	}
	}

	function calculateTokensReceived(uint256 _ethereumToSpend) public view returns (uint256) {
	uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereumToSpend, entryFee_), 100);
	uint256 _taxedEthereum = SafeMath.sub(_ethereumToSpend, _dividends);
	uint256 _amountOfTokens = ethereumToTokens(_taxedEthereum);

	return _amountOfTokens;
	}

	function calculateEthereumReceived(uint256 _tokensToSell) public view returns (uint256) {
	require(_tokensToSell <= tokenSupply_);
	uint256 _ethereum = tokensToEthereum_(_tokensToSell);
	uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, exitFee_), 100);
	uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
	return _taxedEthereum;
	}


	function purchaseTokens(uint256 _incomingEthereum, address _referredBy) internal returns (uint256) {
	address _customerAddress = msg.sender;
	uint256 _undivDividends = SafeMath.div(SafeMath.mul(_incomingEthereum, entryFee_), 100);
	uint256 _referralBonus = SafeMath.div(SafeMath.mul(_undivDividends, refferalFee_), 100);
	_undivDividends = SafeMath.div(SafeMath.mul(_incomingEthereum, (entryFee_-1)), 100);
	uint256 _dividends = SafeMath.sub(_undivDividends, _referralBonus);
	uint256 _taxedEthereum = SafeMath.sub(_incomingEthereum, _undivDividends);
	uint256 _amountOfTokens = ethereumToTokens(_taxedEthereum);
	uint256 _fee = _dividends * magnitude;

	require(_amountOfTokens > 0 && SafeMath.add(_amountOfTokens, tokenSupply_) > tokenSupply_);

	referralBalance_[owner] = referralBalance_[owner] + SafeMath.div(SafeMath.mul(_incomingEthereum, 1), 100);

	if (
	_referredBy != 0x0000000000000000000000000000000000000000 &&
	_referredBy != _customerAddress &&
	tokenBalanceLedger_[_referredBy] >= stakingRequirement
	) {
	if (refer[_customerAddress] == 0x0000000000000000000000000000000000000000) {
	refer[_customerAddress] = _referredBy;
	}
	referralBalance_[_referredBy] = SafeMath.add(referralBalance_[_referredBy], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee1), 100));
	address ref2 = refer[_referredBy];

	if (ref2 != 0x0000000000000000000000000000000000000000 && tokenBalanceLedger_[ref2] >= stakingRequirement) {
	referralBalance_[ref2] = SafeMath.add(referralBalance_[ref2], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee2), 100));
	address ref3 = refer[ref2];
	if (ref3 != 0x0000000000000000000000000000000000000000 && tokenBalanceLedger_[ref3] >= stakingRequirement) {
	referralBalance_[ref3] = SafeMath.add(referralBalance_[ref3], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee3), 100));
	}else{
	referralBalance_[owner] = SafeMath.add(referralBalance_[owner], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee3), 100));
	}
	}else{
	referralBalance_[owner] = SafeMath.add(referralBalance_[owner], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee2), 100));
	referralBalance_[owner] = SafeMath.add(referralBalance_[owner], SafeMath.div(SafeMath.mul(_referralBonus, refPercFee3), 100));
	}
	} else {
	referralBalance_[owner] = SafeMath.add(referralBalance_[owner], _referralBonus);
	}

	if (tokenSupply_ > 0) {
	tokenSupply_ = SafeMath.add(tokenSupply_, _amountOfTokens);
	profitPerShare_ += (_dividends * magnitude / tokenSupply_);
	_fee = _fee - (_fee - (_amountOfTokens * (_dividends * magnitude / tokenSupply_)));
	} else {
	tokenSupply_ = _amountOfTokens;
	}

	tokenBalanceLedger_[_customerAddress] = SafeMath.add(tokenBalanceLedger_[_customerAddress], _amountOfTokens);
	int256 _updatedPayouts = (int256) (profitPerShare_ * _amountOfTokens - _fee);
	payoutsTo_[_customerAddress] += _updatedPayouts;
	emit onTokenPurchase(_customerAddress, _incomingEthereum, _amountOfTokens, _referredBy, now, buyPrice());

	return _amountOfTokens;
	}

	function ethereumToTokens(uint256 _ethereum) internal view returns (uint256) {
	uint256 _tokenPriceInitial = tokenPriceInitial_ * 1e18;
	uint256 _tokensReceived =
	(
	(
	SafeMath.sub(
	(sqrt
	(
	(_tokenPriceInitial ** 2)
	+
	(2 * (tokenPriceIncremental_ * 1e18) * (_ethereum * 1e18))
	+
	((tokenPriceIncremental_ ** 2) * (tokenSupply_ ** 2))
	+
	(2 * tokenPriceIncremental_ * _tokenPriceInitial*tokenSupply_)
	)
	), _tokenPriceInitial
	)
	) / (tokenPriceIncremental_)
	) - (tokenSupply_);

	return _tokensReceived;
	}

	function getParent(address child) public view returns (address) {
	return refer[child];
	}

	function tokensToEthereum_(uint256 _tokens) internal view returns (uint256) {
	uint256 tokens_ = (_tokens + 1e18);
	uint256 _tokenSupply = (tokenSupply_ + 1e18);
	uint256 _etherReceived =
	(
	SafeMath.sub(
	(
	(
	(
	tokenPriceInitial_ + (tokenPriceIncremental_ * (_tokenSupply / 1e18))
	) - tokenPriceIncremental_
	) * (tokens_ - 1e18)
	), (tokenPriceIncremental_ * ((tokens_ ** 2 - tokens_) / 1e18)) / 2
	)
	/ 1e18);

	return _etherReceived;
	}

	function sqrt(uint256 x) internal pure returns (uint256 y) {
	uint256 z = (x + 1) / 2;
	y = x;

	while (z < y) {
	y = z;
	z = (x / z + z) / 2;
	}
	}
	function changeOwner(address _newOwner) onlyOwner public returns (bool success) {
	owner = _newOwner;
	}
	}

	library SafeMath {
	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;
	}

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

	function sub(uint256 a, uint256 b) internal pure returns (uint256) {
	assert(b <= a);
	return a - b;
	}

	function add(uint256 a, uint256 b) internal pure returns (uint256) {
	uint256 c = a + b;
	assert(c >= a);
	return c;
	}
	}