Contract Diff Checker

Contract Name:
PhenixReferral

Contract Source Code:

File 1 of 1 : PhenixReferral

/**
 *Submitted for verification at cronoscan.com on 2022-04-25
 */

// File: contracts/SafeMath.sol

// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        unchecked {
            // 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-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// File: contracts/Context.sol

// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity >=0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// File: contracts/Ownable.sol

// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity >=0.8.0;

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: contracts/IERC20.sol

// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: 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
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}
// File: contracts/IUniswapV2Router01.sol

pragma solidity >=0.8.0;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        external
        returns (
            uint256 amountA,
            uint256 amountB,
            uint256 liquidity
        );

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETH(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountToken, uint256 amountETH);

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETHWithPermit(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountToken, uint256 amountETH);

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapTokensForExactTokens(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactETHForTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function swapTokensForExactETH(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactTokensForETH(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapETHForExactTokens(
        uint256 amountOut,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function quote(
        uint256 amountA,
        uint256 reserveA,
        uint256 reserveB
    ) external pure returns (uint256 amountB);

    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountOut);

    function getAmountIn(
        uint256 amountOut,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountIn);

    function getAmountsOut(uint256 amountIn, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);

    function getAmountsIn(uint256 amountOut, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);
}

// File: contracts/IUniswapV2Router02.sol

pragma solidity >=0.8.0;

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountETH);

    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

// File: contracts/PhenixReferral.sol

pragma solidity >=0.8.0;

contract PhenixReferral is Ownable {
    using SafeMath for uint256;

    address public routerAddress;
    address public tokenAddress;
    uint256 public totalEthSwapped;
    uint256 public totalEthRewards;
    uint256 public totalPendingEthRewards;
    uint256 public totalTokensSwapped;
    bool public referralModeActive;
    uint256 public minTokensRequired;
    uint256 public totalReferralLevels;
    uint256 public baseBuyAllocation;
    uint256 public baseBuyAllocationDenomiator;

    struct Referrer {
        uint256 totalReferredEth;
        uint256 totalReferredTokens;
        uint256 totalReferredEthRewards;
        uint256 pendingReferredEthRewards;
        uint256 referrerLevel;
        uint256 totalReferrals;
        bool referralStatus;
    }

    struct ReferrerLevel {
        uint256 referredEthRequirement;
        uint256 referrerFeeAllocationPercentage;
        uint256 feePercentageDenominator;
    }

    mapping(address => Referrer) private referrers;
    address[] referrerAddresses;
    mapping(uint256 => ReferrerLevel) referrerLevels;
    mapping(address => mapping(address => bool)) public hasReferred;

    modifier isEnabled() {
        require(referralModeActive == true, "Referral Mode is not active.");
        _;
    }

    modifier isJoined(address _referrerAddress) {
        require(
            referrers[_referrerAddress].referralStatus == true,
            "Address is not in referral program."
        );
        _;
    }

    modifier canJoin() {
        require(
            IERC20(tokenAddress).balanceOf(msg.sender) >= minTokensRequired &&
                referrers[msg.sender].referralStatus == false,
            "Not enough tokens to join referral program or already in the referral program."
        );
        _;
    }

    modifier canClaim() {
        require(
            (referrers[msg.sender].pendingReferredEthRewards > 0) &&
                (address(this).balance >=
                    referrers[msg.sender].pendingReferredEthRewards),
            "No rewards to claim or not enough ETH in contract."
        );
        _;
    }

    modifier referralAllowed(address _referrerAddress) {
        require(
            _referrerAddress != msg.sender,
            "Referrer and buyer cannot be the same."
        );
        _;
    }

    event UpdateReferralLevelFees(
        uint256 _referralLevel,
        uint256 _referredEthRequirement,
        uint256 indexed _referrerFeeAllocationPercentage,
        uint256 indexed _feePercentageDenominator
    );
    event SwapExactEthForTokensWithReferral(
        address indexed _referrerAddress,
        address indexed _buyerAddress,
        uint256 indexed _amountEthSwapped
    );
    event ClaimEthRewards(
        address indexed _referrerAddress,
        uint256 indexed _claimedEthAmount
    );
    event UpdateReferralActiveState(bool indexed _state);
    event JoinReferralProgram(address indexed _reffererAddress);
    event UpdateMinimumTokensRequired(uint256 indexed _amountTokens);
    event UpdateTokenAddress(address indexed _tokenAddress);
    event UpdateRouterAddress(address indexed _routerAddress);
    event UpdateBaseBuyAllocation(
        uint256 indexed _percentage,
        uint256 indexed _denominator
    );

    constructor(address _tokenAddress, address _routerAddress) {
        tokenAddress = _tokenAddress;
        routerAddress = _routerAddress;

        referrers[msg.sender].referralStatus = true;
        referrerAddresses.push(msg.sender);

        _addReferralLevel(0, 1, 100);
        _addReferralLevel(15000000000000000000000, 2, 100);
        _addReferralLevel(50000000000000000000000, 3, 100);
        _addReferralLevel(100000000000000000000000, 5, 100);

        baseBuyAllocation = 88;
        baseBuyAllocationDenomiator = 100;

        referralModeActive = false;
    }

    function updateReferralActiveState(bool _state) external onlyOwner {
        referralModeActive = _state;

        emit UpdateReferralActiveState(_state);
    }

    function updateMinimumTokensRequired(uint256 _minTokens)
        external
        onlyOwner
    {
        minTokensRequired = _minTokens;

        emit UpdateMinimumTokensRequired(_minTokens);
    }

    function updateBaseBuyAllocation(uint256 _percentage, uint256 _denominator)
        external
        onlyOwner
    {
        baseBuyAllocation = _percentage;
        baseBuyAllocationDenomiator = _denominator;

        emit UpdateBaseBuyAllocation(_percentage, _denominator);
    }


    function getTotalReferrers() external view returns(uint256) {
        return referrerAddresses.length;
    }

    function joinReferralProgram() external canJoin {
        referrers[msg.sender].referralStatus = true;
        referrerAddresses.push(msg.sender);

        emit JoinReferralProgram(msg.sender);
    }

    function getReferrerAddressByIndex(uint256 _index)
        external
        view
        returns (address)
    {
        return referrerAddresses[_index];
    }

    function getReferrerDetails(address _address)
        external
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256,
            bool
        )
    {
        return (
            referrers[_address].totalReferredEth,
            referrers[_address].totalReferredTokens,
            referrers[_address].totalReferredEthRewards,
            referrers[_address].pendingReferredEthRewards,
            referrers[_address].referrerLevel,
            referrers[_address].totalReferrals,
            referrers[_address].referralStatus
        );
    }

    function getReferralLevelDetails(uint256 _level)
        external
        view
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        return (
            referrerLevels[_level].referredEthRequirement,
            referrerLevels[_level].referrerFeeAllocationPercentage,
            referrerLevels[_level].feePercentageDenominator
        );
    }

    function _getReferrerLevelAndUpdate(
        address _referrerAddress,
        uint256 _payableValue
    ) internal returns (uint256) {
        uint256 referrerLevel = referrers[_referrerAddress].referrerLevel;
        uint256 newTotalReferredEth = referrers[_referrerAddress]
            .totalReferredEth
            .add(_payableValue);

        // check if referrer needs to be upgraded to the next rank
        if (referrerLevel != (totalReferralLevels - 1)) {
            for (uint256 i = referrerLevel; i < totalReferralLevels; i++) {
                if (
                    newTotalReferredEth >=
                    referrerLevels[i].referredEthRequirement
                ) {
                    referrerLevel = i;
                }
            }
        }

        // check if referrer level has updated then apply new level to data
        if (referrerLevel != referrers[_referrerAddress].referrerLevel) {
            referrers[_referrerAddress].referrerLevel = referrerLevel;
        }

        return referrers[_referrerAddress].referrerLevel;
    }

    function _getPathForETHtoToken() internal view returns (address[] memory) {
        address[] memory path = new address[](2);
        path[0] = IUniswapV2Router02(routerAddress).WETH();
        path[1] = address(tokenAddress);
        return path;
    }

    function updateTokenAddress(address _tokenAddress) external onlyOwner {
        tokenAddress = _tokenAddress;

        emit UpdateTokenAddress(_tokenAddress);
    }

    function updateRouterAddress(address _routerAddress) external onlyOwner {
        routerAddress = _routerAddress;

        emit UpdateRouterAddress(_routerAddress);
    }

    function swapExactEthForTokensWithReferral(
        address _referrerAddress,
        uint256 _deadline
    )
        external
        payable
        isJoined(_referrerAddress)
        referralAllowed(_referrerAddress)
        isEnabled
    {
        require(msg.value > 0, "No ETH payed in transaction.");

        if (hasReferred[_referrerAddress][msg.sender] != true) {
            hasReferred[_referrerAddress][msg.sender] = true;
            referrers[_referrerAddress].totalReferrals = referrers[
                _referrerAddress
            ].totalReferrals.add(1);
        }

        uint256 referrerLevel = _getReferrerLevelAndUpdate(
            _referrerAddress,
            msg.value
        );
        ReferrerLevel memory currentReferrerLevel = referrerLevels[
            referrerLevel
        ];

        // update referrer allocation and update payable amount to router
        uint256 referrerFeeAllocation = uint256(msg.value)
            .mul(currentReferrerLevel.referrerFeeAllocationPercentage)
            .div(currentReferrerLevel.feePercentageDenominator);

        // update referrer eth reward values
        referrers[_referrerAddress].totalReferredEthRewards = referrers[
            _referrerAddress
        ].totalReferredEthRewards.add(referrerFeeAllocation);

        referrers[_referrerAddress].pendingReferredEthRewards = referrers[
            _referrerAddress
        ].pendingReferredEthRewards.add(referrerFeeAllocation);

        referrers[_referrerAddress].totalReferredEth = referrers[
            _referrerAddress
        ].totalReferredEth.add(msg.value);

        uint256 newPaybleAmount = uint256(msg.value).sub(referrerFeeAllocation);

        uint256[] memory amounts = new uint256[](2);
        uint256[] memory amountsFull = new uint256[](2);

        amounts = IUniswapV2Router02(routerAddress).swapExactETHForTokens{
            value: newPaybleAmount
        }(0, _getPathForETHtoToken(), address(this), _deadline);

        amountsFull = IUniswapV2Router02(routerAddress).getAmountsOut(
            msg.value,
            _getPathForETHtoToken()
        );

        referrers[_referrerAddress].totalReferredTokens = referrers[
            _referrerAddress
        ].totalReferredTokens.add(amounts[1]);

        uint256 buyerTokenAllocation = amountsFull[1]
            .mul(baseBuyAllocation)
            .div(baseBuyAllocationDenomiator);

        // send buyer token allocation
        IERC20(tokenAddress).transfer(msg.sender, buyerTokenAllocation);

        // update globals
        totalEthSwapped = totalEthSwapped.add(msg.value);
        totalTokensSwapped = totalTokensSwapped.add(amounts[1]);
        totalEthRewards = totalEthRewards.add(referrerFeeAllocation);
        totalPendingEthRewards = totalPendingEthRewards.add(
            referrerFeeAllocation
        );

        emit SwapExactEthForTokensWithReferral(
            _referrerAddress,
            msg.sender,
            msg.value
        );
    }

    function claimEthRewards() external isJoined(msg.sender) canClaim {
        uint256 rewardsToClaim = referrers[msg.sender]
            .pendingReferredEthRewards;
        referrers[msg.sender].pendingReferredEthRewards = 0;
        totalPendingEthRewards = totalPendingEthRewards.sub(rewardsToClaim);

        (bool sent, ) = address(msg.sender).call{value: rewardsToClaim}("");

        require(sent, "Claim failed.");

        emit ClaimEthRewards(msg.sender, rewardsToClaim);
    }

    function updateReferralLevelFees(
        uint256 _referralLevel,
        uint256 _referredEthRequirement,
        uint256 _referrerFeeAllocationPercentage,
        uint256 _feePercentageDenominator
    ) external onlyOwner {
        require(
            _referralLevel <= totalReferralLevels,
            "Referral level exceeds total referral levels"
        );

        referrerLevels[_referralLevel]
            .referredEthRequirement = _referredEthRequirement;
        referrerLevels[_referralLevel]
            .referrerFeeAllocationPercentage = _referrerFeeAllocationPercentage;
        referrerLevels[_referralLevel]
            .feePercentageDenominator = _feePercentageDenominator;

        emit UpdateReferralLevelFees(
            _referralLevel,
            _referredEthRequirement,
            _referrerFeeAllocationPercentage,
            _feePercentageDenominator
        );
    }

    function _addReferralLevel(
        uint256 _referredEthRequirement,
        uint256 _referrerFeeAllocationPercentage,
        uint256 _feePercentageDenominator
    ) internal {
        referrerLevels[totalReferralLevels] = ReferrerLevel(
            _referredEthRequirement,
            _referrerFeeAllocationPercentage,
            _feePercentageDenominator
        );

        totalReferralLevels = totalReferralLevels.add(1);
    }

    function addReferralLevel(
        uint256 _referredEthRequirement,
        uint256 _referrerFeeAllocationPercentage,
        uint256 _feePercentageDenominator
    ) external onlyOwner {
        _addReferralLevel(
            _referredEthRequirement,
            _referrerFeeAllocationPercentage,
            _feePercentageDenominator
        );
    }

    function removeLastReferralLevel() external onlyOwner {
        require(totalReferralLevels > 0, "Only one referral rank remains. Cannot remove anymore.");

        totalReferralLevels = totalReferralLevels.sub(1);
        referrerLevels[totalReferralLevels] = ReferrerLevel(
            0,
            0,
            0
        );
    }

    function emergencyRecoverTokens() external onlyOwner {
        IERC20(tokenAddress).transfer(
            owner(),
            IERC20(tokenAddress).balanceOf(address(this))
        );
    }

    function emergencyRecoverEth() external onlyOwner {
        uint256 amountToRecover = uint256(address(this).balance).sub(
            totalPendingEthRewards
        );

        require(amountToRecover > 0, "No ETH in contract to recover");

        (bool sent, ) = address(owner()).call{value: amountToRecover}("");

        require(sent, "Claim failed.");
    }

    receive() external payable {}
}

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