Contract Source Code:

// SPDX-License-Identifier: MIT

pragma solidity 0.8.16;

library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

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

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

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

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }
}

library SafeMathInt {
    int256 private constant MIN_INT256 = int256(1) << 255;
    int256 private constant MAX_INT256 = ~(int256(1) << 255);

    function mul(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a * b;

        require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
        require((b == 0) || (c / b == a));
        return c;
    }

    function div(int256 a, int256 b) internal pure returns (int256) {
        require(b != -1 || a != MIN_INT256);

        return a / b;
    }

    function sub(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a - b;
        require((b >= 0 && c <= a) || (b < 0 && c > a));
        return c;
    }

    function add(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a + b;
        require((b >= 0 && c >= a) || (b < 0 && c < a));
        return c;
    }

    function toUint256Safe(int256 a) internal pure returns (uint256) {
        require(a >= 0);
        return uint256(a);
    }
}

library SafeMathUint {
    function toInt256Safe(uint256 a) internal pure returns (int256) {
        int256 b = int256(a);
        require(b >= 0);
        return b;
    }
}

abstract contract Initializable {
    bool private _initialized;

    bool private _initializing;

    modifier initializer() {
        require(
            _initializing || !_initialized,
            "Initializable: contract is already initialized"
        );

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }
}

abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal initializer {
        __Context_init_unchained();
    }

    function __Context_init_unchained() internal initializer {}

    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

    uint256[50] private __gap;
}

interface IERC20Upgradeable {
    function totalSupply() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    function transfer(
        address recipient,
        uint256 amount
    ) external returns (bool);

    function allowance(
        address owner,
        address spender
    ) external view returns (uint256);

    function approve(address spender, uint256 amount) external returns (bool);

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

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

    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
}

interface IERC20MetadataUpgradeable is IERC20Upgradeable {
    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);
}

contract ERC20Upgradeable is
    Initializable,
    ContextUpgradeable,
    IERC20Upgradeable,
    IERC20MetadataUpgradeable
{
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    function __ERC20_init(
        string memory name_,
        string memory symbol_
    ) internal initializer {
        __Context_init_unchained();
        __ERC20_init_unchained(name_, symbol_);
    }

    function __ERC20_init_unchained(
        string memory name_,
        string memory symbol_
    ) internal initializer {
        _name = name_;
        _symbol = symbol_;
    }

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(
        address account
    ) public view virtual override returns (uint256) {
        return _balances[account];
    }

    function transfer(
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(
        address owner,
        address spender
    ) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(
        address spender,
        uint256 amount
    ) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(
            currentAllowance >= amount,
            "ERC20: transfer amount exceeds allowance"
        );
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    function increaseAllowance(
        address spender,
        uint256 addedValue
    ) public virtual returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender] + addedValue
        );
        return true;
    }

    function decreaseAllowance(
        address spender,
        uint256 subtractedValue
    ) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(
            currentAllowance >= subtractedValue,
            "ERC20: decreased allowance below zero"
        );
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(
            senderBalance >= amount,
            "ERC20: transfer amount exceeds balance"
        );
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    uint256[45] private __gap;
}

abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    function __Ownable_init() internal initializer {
        __Context_init_unchained();
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal initializer {
        _setOwner(_msgSender());
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    uint256[49] private __gap;
}

interface DividendPayingTokenInterface {
    function dividendOf(address _owner) external view returns (uint256);

    function withdrawDividend() external;

    event DividendsDistributed(address indexed from, uint256 weiAmount);

    event DividendWithdrawn(address indexed to, uint256 weiAmount);
}

interface DividendPayingTokenOptionalInterface {
    function withdrawableDividendOf(
        address _owner
    ) external view returns (uint256);

    function withdrawnDividendOf(
        address _owner
    ) external view returns (uint256);

    function accumulativeDividendOf(
        address _owner
    ) external view returns (uint256);
}

contract DividendPayingToken is
    ERC20Upgradeable,
    OwnableUpgradeable,
    DividendPayingTokenInterface,
    DividendPayingTokenOptionalInterface
{
    using SafeMath for uint256;
    using SafeMathUint for uint256;
    using SafeMathInt for int256;

    address public rewardToken;

    uint256 internal constant magnitude = 2 ** 128;

    uint256 internal magnifiedDividendPerShare;

    mapping(address => int256) internal magnifiedDividendCorrections;
    mapping(address => uint256) internal withdrawnDividends;

    uint256 public totalDividendsDistributed;

    function __DividendPayingToken_init(
        address _rewardToken,
        string memory _name,
        string memory _symbol
    ) internal initializer {
        __Ownable_init();
        __ERC20_init(_name, _symbol);
        rewardToken = _rewardToken;
    }

    function distributeCAKEDividends(uint256 amount) public onlyOwner {
        require(totalSupply() > 0);

        if (amount > 0) {
            magnifiedDividendPerShare = magnifiedDividendPerShare.add(
                (amount).mul(magnitude) / totalSupply()
            );
            emit DividendsDistributed(msg.sender, amount);

            totalDividendsDistributed = totalDividendsDistributed.add(amount);
        }
    }

    function withdrawDividend() public virtual override {
        _withdrawDividendOfUser(payable(msg.sender));
    }

    function _withdrawDividendOfUser(
        address payable user
    ) internal returns (uint256) {
        uint256 _withdrawableDividend = withdrawableDividendOf(user);
        if (_withdrawableDividend > 0) {
            withdrawnDividends[user] = withdrawnDividends[user].add(
                _withdrawableDividend
            );
            emit DividendWithdrawn(user, _withdrawableDividend);
            bool success = IERC20(rewardToken).transfer(
                user,
                _withdrawableDividend
            );

            if (!success) {
                withdrawnDividends[user] = withdrawnDividends[user].sub(
                    _withdrawableDividend
                );
                return 0;
            }

            return _withdrawableDividend;
        }

        return 0;
    }

    function dividendOf(address _owner) public view override returns (uint256) {
        return withdrawableDividendOf(_owner);
    }

    function withdrawableDividendOf(
        address _owner
    ) public view override returns (uint256) {
        return accumulativeDividendOf(_owner).sub(withdrawnDividends[_owner]);
    }

    function withdrawnDividendOf(
        address _owner
    ) public view override returns (uint256) {
        return withdrawnDividends[_owner];
    }

    function accumulativeDividendOf(
        address _owner
    ) public view override returns (uint256) {
        return
            magnifiedDividendPerShare
                .mul(balanceOf(_owner))
                .toInt256Safe()
                .add(magnifiedDividendCorrections[_owner])
                .toUint256Safe() / magnitude;
    }

    function _transfer(
        address from,
        address to,
        uint256 value
    ) internal virtual override {
        require(false);

        int256 _magCorrection = magnifiedDividendPerShare
            .mul(value)
            .toInt256Safe();
        magnifiedDividendCorrections[from] = magnifiedDividendCorrections[from]
            .add(_magCorrection);
        magnifiedDividendCorrections[to] = magnifiedDividendCorrections[to].sub(
            _magCorrection
        );
    }

    function _mint(address account, uint256 value) internal override {
        super._mint(account, value);

        magnifiedDividendCorrections[account] = magnifiedDividendCorrections[
            account
        ].sub((magnifiedDividendPerShare.mul(value)).toInt256Safe());
    }

    function _burn(address account, uint256 value) internal override {
        super._burn(account, value);

        magnifiedDividendCorrections[account] = magnifiedDividendCorrections[
            account
        ].add((magnifiedDividendPerShare.mul(value)).toInt256Safe());
    }

    function _setBalance(address account, uint256 newBalance) internal {
        uint256 currentBalance = balanceOf(account);

        if (newBalance > currentBalance) {
            uint256 mintAmount = newBalance.sub(currentBalance);
            _mint(account, mintAmount);
        } else if (newBalance < currentBalance) {
            uint256 burnAmount = currentBalance.sub(newBalance);
            _burn(account, burnAmount);
        }
    }
}

library IterableMapping {
    struct Map {
        address[] keys;
        mapping(address => uint256) values;
        mapping(address => uint256) indexOf;
        mapping(address => bool) inserted;
    }

    function get(Map storage map, address key) public view returns (uint256) {
        return map.values[key];
    }

    function getIndexOfKey(
        Map storage map,
        address key
    ) public view returns (int256) {
        if (!map.inserted[key]) {
            return -1;
        }
        return int256(map.indexOf[key]);
    }

    function getKeyAtIndex(
        Map storage map,
        uint256 index
    ) public view returns (address) {
        return map.keys[index];
    }

    function size(Map storage map) public view returns (uint256) {
        return map.keys.length;
    }

    function set(Map storage map, address key, uint256 val) public {
        if (map.inserted[key]) {
            map.values[key] = val;
        } else {
            map.inserted[key] = true;
            map.values[key] = val;
            map.indexOf[key] = map.keys.length;
            map.keys.push(key);
        }
    }

    function remove(Map storage map, address key) public {
        if (!map.inserted[key]) {
            return;
        }

        delete map.inserted[key];
        delete map.values[key];

        uint256 index = map.indexOf[key];
        uint256 lastIndex = map.keys.length - 1;
        address lastKey = map.keys[lastIndex];

        map.indexOf[lastKey] = index;
        delete map.indexOf[key];

        map.keys[index] = lastKey;
        map.keys.pop();
    }
}

contract DividendTracker is OwnableUpgradeable, DividendPayingToken {
    using SafeMath for uint256;
    using SafeMathInt for int256;
    using IterableMapping for IterableMapping.Map;

    IterableMapping.Map private tokenHoldersMap;
    uint256 public lastProcessedIndex;

    mapping(address => bool) public excludedFromDividends;

    mapping(address => uint256) public lastClaimTimes;

    uint256 public claimWait;
    uint256 public minimumTokenBalanceForDividends;

    event ExcludeFromDividends(address indexed account);
    event ClaimWaitUpdated(uint256 indexed newValue, uint256 indexed oldValue);

    event Claim(
        address indexed account,
        uint256 amount,
        bool indexed automatic
    );

    function initialize(
        address rewardToken_,
        uint256 minimumTokenBalanceForDividends_
    ) external initializer {
        DividendPayingToken.__DividendPayingToken_init(
            rewardToken_,
            "DividendTracker",
            "DividendTracker"
        );
        claimWait = 3600;
        minimumTokenBalanceForDividends = minimumTokenBalanceForDividends_;
    }

    function _transfer(address, address, uint256) internal pure override {
        require(false, "DividendTracker transfers are not allowed");
    }

    function withdrawDividend() public pure override {
        require(false, "DividendTracker withdrawDividend is disabled.");
    }

    function excludeFromDividends(address account) external onlyOwner {
        require(!excludedFromDividends[account]);
        excludedFromDividends[account] = true;

        _setBalance(account, 0);
        tokenHoldersMap.remove(account);

        emit ExcludeFromDividends(account);
    }

    function isExcludedFromDividends(
        address account
    ) public view returns (bool) {
        return excludedFromDividends[account];
    }

    function updateClaimWait(uint256 newClaimWait) external onlyOwner {
        require(
            newClaimWait >= 3600 && newClaimWait <= 86400,
            "ClaimWait must be between 1 to 24 hours"
        );
        require(
            newClaimWait != claimWait,
            "Cannot update newClaimWait to the same value"
        );
        emit ClaimWaitUpdated(newClaimWait, claimWait);
        claimWait = newClaimWait;
    }

    function updateMinimumTokenBalanceForDividends(
        uint256 amount
    ) external onlyOwner {
        minimumTokenBalanceForDividends = amount;
    }

    function getLastProcessedIndex() external view returns (uint256) {
        return lastProcessedIndex;
    }

    function getNumberOfTokenHolders() external view returns (uint256) {
        return tokenHoldersMap.keys.length;
    }

    function getAccount(
        address _account
    )
        public
        view
        returns (
            address account,
            int256 index,
            int256 iterationsUntilProcessed,
            uint256 withdrawableDividends,
            uint256 totalDividends,
            uint256 lastClaimTime,
            uint256 nextClaimTime,
            uint256 secondsUntilAutoClaimAvailable
        )
    {
        account = _account;

        index = tokenHoldersMap.getIndexOfKey(account);

        iterationsUntilProcessed = -1;

        if (index >= 0) {
            if (uint256(index) > lastProcessedIndex) {
                iterationsUntilProcessed = index.sub(
                    int256(lastProcessedIndex)
                );
            } else {
                uint256 processesUntilEndOfArray = tokenHoldersMap.keys.length >
                    lastProcessedIndex
                    ? tokenHoldersMap.keys.length.sub(lastProcessedIndex)
                    : 0;

                iterationsUntilProcessed = index.add(
                    int256(processesUntilEndOfArray)
                );
            }
        }

        withdrawableDividends = withdrawableDividendOf(account);
        totalDividends = accumulativeDividendOf(account);

        lastClaimTime = lastClaimTimes[account];

        nextClaimTime = lastClaimTime > 0 ? lastClaimTime.add(claimWait) : 0;

        secondsUntilAutoClaimAvailable = nextClaimTime > block.timestamp
            ? nextClaimTime.sub(block.timestamp)
            : 0;
    }

    function getAccountAtIndex(
        uint256 index
    )
        public
        view
        returns (
            address,
            int256,
            int256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        if (index >= tokenHoldersMap.size()) {
            return (address(0), -1, -1, 0, 0, 0, 0, 0);
        }

        address account = tokenHoldersMap.getKeyAtIndex(index);

        return getAccount(account);
    }

    function canAutoClaim(uint256 lastClaimTime) private view returns (bool) {
        if (lastClaimTime > block.timestamp) {
            return false;
        }

        return block.timestamp.sub(lastClaimTime) >= claimWait;
    }

    function setBalance(
        address payable account,
        uint256 newBalance
    ) external onlyOwner {
        if (excludedFromDividends[account]) {
            return;
        }
        if (newBalance >= minimumTokenBalanceForDividends) {
            _setBalance(account, newBalance);
            tokenHoldersMap.set(account, newBalance);
        } else {
            _setBalance(account, 0);
            tokenHoldersMap.remove(account);
        }
        processAccount(account, true);
    }

    function process(uint256 gas) public returns (uint256, uint256, uint256) {
        uint256 numberOfTokenHolders = tokenHoldersMap.keys.length;

        if (numberOfTokenHolders == 0) {
            return (0, 0, lastProcessedIndex);
        }

        uint256 _lastProcessedIndex = lastProcessedIndex;

        uint256 gasUsed = 0;

        uint256 gasLeft = gasleft();

        uint256 iterations = 0;
        uint256 claims = 0;

        while (gasUsed < gas && iterations < numberOfTokenHolders) {
            _lastProcessedIndex++;

            if (_lastProcessedIndex >= tokenHoldersMap.keys.length) {
                _lastProcessedIndex = 0;
            }

            address account = tokenHoldersMap.keys[_lastProcessedIndex];

            if (canAutoClaim(lastClaimTimes[account])) {
                if (processAccount(payable(account), true)) {
                    claims++;
                }
            }

            iterations++;

            uint256 newGasLeft = gasleft();

            if (gasLeft > newGasLeft) {
                gasUsed = gasUsed.add(gasLeft.sub(newGasLeft));
            }

            gasLeft = newGasLeft;
        }

        lastProcessedIndex = _lastProcessedIndex;

        return (iterations, claims, lastProcessedIndex);
    }

    function processAccount(
        address payable account,
        bool automatic
    ) public onlyOwner returns (bool) {
        uint256 amount = _withdrawDividendOfUser(account);

        if (amount > 0) {
            lastClaimTimes[account] = block.timestamp;
            emit Claim(account, amount, automatic);
            return true;
        }

        return false;
    }
}

interface IERC20 {
    function totalSupply() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    function transfer(
        address recipient,
        uint256 amount
    ) external returns (bool);

    function allowance(
        address owner,
        address spender
    ) external view returns (uint256);

    function approve(address spender, uint256 amount) external returns (bool);

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

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

    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
}

interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;
    uint8 private _decimals;
    string private _name;
    string private _symbol;

    constructor(string memory name_, string memory symbol_, uint8 decimals_) {
        _name = name_;
        _symbol = symbol_;
        _decimals = decimals_;
    }

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual override returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(
        address account
    ) public view virtual override returns (uint256) {
        return _balances[account];
    }

    function transfer(
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(
        address owner,
        address spender
    ) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(
        address spender,
        uint256 amount
    ) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(
            currentAllowance >= amount,
            "ERC20: transfer amount exceeds allowance"
        );
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    function increaseAllowance(
        address spender,
        uint256 addedValue
    ) public virtual returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender] + addedValue
        );
        return true;
    }

    function decreaseAllowance(
        address spender,
        uint256 subtractedValue
    ) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(
            currentAllowance >= subtractedValue,
            "ERC20: decreased allowance below zero"
        );
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        uint256 senderBalance = _balances[sender];
        require(
            senderBalance >= amount,
            "ERC20: transfer amount exceeds balance"
        );
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
}

abstract contract Ownable is Context {
    address private _owner;

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

    constructor() {
        _setOwner(_msgSender());
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

library Clones {
    function clone(address implementation) internal returns (address instance) {
        assembly {
            let ptr := mload(0x40)
            mstore(
                ptr,
                0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000
            )
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(
                add(ptr, 0x28),
                0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000
            )
            instance := create(0, ptr, 0x37)
        }
        require(instance != address(0), "ERC1167: create failed");
    }
}

interface IUniswapV2Factory {
    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);

    function getPair(
        address tokenA,
        address tokenB
    ) external view returns (address pair);
}

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

    function WETH() external pure returns (address);

    function WETC() external pure returns (address);

    function WHT() external pure returns (address);

    function WROSE() external pure returns (address);

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

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

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

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

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

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

    function swapExactTokensForROSESupportingFeeOnTransferTokens(
        uint256 amountIn,
        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;
}

abstract contract BaseToken {
    event TokenCreated(
        address indexed owner,
        address indexed token,
        string tokenType,
        uint256 version
    );
}

contract DividendToken is ERC20, Ownable, BaseToken {
    uint256 public constant VERSION = 4;

    IUniswapV2Router02 public uniswapV2Router;

    bool private swapping;

    DividendTracker public dividendTracker;

    address public rewardToken;

    uint256 public swapTokensAtAmount;

    uint256 public tokenRewardsFee;
    uint256 public liquidityFee;
    uint256 public marketingFee;
    uint256 public totalFees;

    address public marketingWalletAddress;

    uint256 public gasForProcessing;

    mapping(address => bool) private _isExcludedFromFees;

    mapping(address => bool) public automatedMarketMakerPairs;

    event ExcludeFromFees(address indexed account);
    event IncludeInFees(address indexed account);
    event ExcludeMultipleAccountsFromFees(address[] accounts);

    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

    event GasForProcessingUpdated(
        uint256 indexed newValue,
        uint256 indexed oldValue
    );

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );

    event SendDividends(uint256 amount);

    event ProcessedDividendTracker(
        uint256 iterations,
        uint256 claims,
        uint256 lastProcessedIndex,
        bool indexed automatic,
        uint256 gas,
        address indexed processor
    );

    event addLiquidityETH(uint256 eth, uint256 tokens, address receiver);

    event transferTokens(uint256 _value, address receiver);

    event SwapTokensAtAmountChanged(uint256 amount);
    event UpdatedMarketingWallet(address account);
    event UpdatedRewardsFee(uint256 amount);
    event UpdatedLiquidityFee(uint256 amount);
    event UpdatedMarketingFee(uint256 amount);
    event SwapTokensForRewardFailed(uint256 amount);
    event ProcessDividendTrackerFailed();
    event SwapTokensForEthFailed(uint256 amount);
    event AddLiquidityFailed(uint256 ethAmount);

    modifier lockTheSwap() {
        swapping = true;
        _;
        swapping = false;
    }

    constructor(
        string memory name_,
        string memory symbol_,
        uint256 totalSupply_,
        uint8 decimal_,
        address dividendTrackerAddress_,
        address[3] memory addrs,
        uint256[3] memory feeSettings,
        uint256 minimumTokenBalanceForDividends_,
        address feeReceiver
    ) payable ERC20(name_, symbol_, decimal_) {
        rewardToken = addrs[0];
        marketingWalletAddress = addrs[2];
        require(
            marketingWalletAddress != address(0),
            "marketingWalletAddress should not be the zero address"
        );
        uniswapV2Router = IUniswapV2Router02(addrs[1]);

        address nativeCurrency = getNativeCurrency();

        require(
            nativeCurrency != rewardToken,
            "The reward token cannot be the native token"
        );

        IUniswapV2Factory factory = IUniswapV2Factory(
            uniswapV2Router.factory()
        );

        require(
            factory.getPair(nativeCurrency, rewardToken) != address(0x0),
            "reward token does not have a pair with the native currency"
        );

        tokenRewardsFee = feeSettings[0];
        liquidityFee = feeSettings[1];
        marketingFee = feeSettings[2];

        updateFees();

        swapTokensAtAmount = totalSupply_ / 1000;
        gasForProcessing = 300000;

        dividendTracker = DividendTracker(
            payable(Clones.clone(dividendTrackerAddress_))
        );
        dividendTracker.initialize(
            rewardToken,
            minimumTokenBalanceForDividends_
        );

        _setAutomatedMarketMakerPair(
            factory.createPair(address(this), nativeCurrency),
            true
        );

        dividendTracker.excludeFromDividends(address(dividendTracker));
        dividendTracker.excludeFromDividends(address(this));
        dividendTracker.excludeFromDividends(owner());
        dividendTracker.excludeFromDividends(address(0xdead));
        dividendTracker.excludeFromDividends(address(uniswapV2Router));

        _isExcludedFromFees[owner()] = true;
        _isExcludedFromFees[marketingWalletAddress] = true;
        _isExcludedFromFees[address(this)] = true;

        _mint(owner(), totalSupply_);

        emit TokenCreated(owner(), address(this), "dividendTracker", VERSION);

        if (feeReceiver == address(0x0)) return;

        payable(feeReceiver).transfer(address(this).balance);
    }

    function getNativeCurrency() internal view returns (address) {
        if (block.chainid == 61) {
            //etc
            return uniswapV2Router.WETC();
        } else if (block.chainid == 128) {
            //heco chain
            return uniswapV2Router.WHT();
        } else if (block.chainid == 42262) {
            //oasis
            return uniswapV2Router.WROSE();
        } else if (block.chainid == 43114 || block.chainid == 43113) {
            //avalance
            return uniswapV2Router.WAVAX();
        } else {
            return uniswapV2Router.WETH();
        }
    }

    receive() external payable {}

    function setSwapTokensAtAmount(uint256 amount) external onlyOwner {
        require(
            amount > totalSupply() / 10 ** 5 &&
                amount <= totalSupply() / 10 ** 3,
            "Amount must be between 0.001% - 0.1 of total supply"
        );
        swapTokensAtAmount = amount;

        emit SwapTokensAtAmountChanged(amount);
    }

    function excludeFromFees(address account) external onlyOwner {
        require(!_isExcludedFromFees[account], "Account is already excluded");

        _isExcludedFromFees[account] = true;

        emit ExcludeFromFees(account);
    }

    function includeInFees(address account) external onlyOwner {
        require(_isExcludedFromFees[account], "Account is already included");

        _isExcludedFromFees[account] = false;

        emit IncludeInFees(account);
    }

    function excludeMultipleAccountsFromFees(
        address[] calldata accounts
    ) external onlyOwner {
        for (uint256 i = 0; i < accounts.length; i++) {
            _isExcludedFromFees[accounts[i]] = true;
        }

        emit ExcludeMultipleAccountsFromFees(accounts);
    }

    function setMarketingWallet(address payable wallet) external onlyOwner {
        require(wallet != address(0), "Can not be address(0).");

        marketingWalletAddress = wallet;

        emit UpdatedMarketingWallet(wallet);
    }

    function setTokenRewardsFee(uint256 value) external onlyOwner {
        tokenRewardsFee = value;

        updateFees();

        emit UpdatedRewardsFee(value);
    }

    function setLiquidityFee(uint256 value) external onlyOwner {
        liquidityFee = value;

        updateFees();

        emit UpdatedLiquidityFee(value);
    }

    function setMarketingFee(uint256 value) external onlyOwner {
        marketingFee = value;

        updateFees();

        emit UpdatedMarketingFee(value);
    }

    function updateFees() internal {
        totalFees = tokenRewardsFee + liquidityFee + marketingFee;

        require(totalFees <= 20, "Total fees can not be over 20%.");
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        require(pair != address(0x0), "cannot mutate the address");
        require(
            automatedMarketMakerPairs[pair] != value,
            "Pair is already set to this address."
        );

        automatedMarketMakerPairs[pair] = value;

        if (value) {
            dividendTracker.excludeFromDividends(pair);
        }

        emit SetAutomatedMarketMakerPair(pair, value);
    }

    function updateGasForProcessing(uint256 newValue) public onlyOwner {
        require(
            newValue >= 200000 && newValue <= 500000,
            "GasForProcessing must be between 200,000 and 500,000."
        );
        require(
            newValue != gasForProcessing,
            "Cannot update gasForProcessing to same value."
        );

        emit GasForProcessingUpdated(newValue, gasForProcessing);

        gasForProcessing = newValue;
    }

    function updateClaimWait(uint256 claimWait) external onlyOwner {
        dividendTracker.updateClaimWait(claimWait);
    }

    function getClaimWait() external view returns (uint256) {
        return dividendTracker.claimWait();
    }

    function updateMinimumTokenBalanceForDividends(
        uint256 amount
    ) external onlyOwner {
        dividendTracker.updateMinimumTokenBalanceForDividends(amount);
    }

    function getMinimumTokenBalanceForDividends()
        external
        view
        returns (uint256)
    {
        return dividendTracker.minimumTokenBalanceForDividends();
    }

    function getTotalDividendsDistributed() external view returns (uint256) {
        return dividendTracker.totalDividendsDistributed();
    }

    function isExcludedFromFees(address account) public view returns (bool) {
        return _isExcludedFromFees[account];
    }

    function withdrawableDividendOf(
        address account
    ) public view returns (uint256) {
        return dividendTracker.withdrawableDividendOf(account);
    }

    function dividendTokenBalanceOf(
        address account
    ) public view returns (uint256) {
        return dividendTracker.balanceOf(account);
    }

    function excludeFromDividends(address account) external onlyOwner {
        dividendTracker.excludeFromDividends(account);
    }

    function isExcludedFromDividends(
        address account
    ) public view returns (bool) {
        return dividendTracker.isExcludedFromDividends(account);
    }

    function getAccountDividendsInfo(
        address account
    )
        external
        view
        returns (
            address,
            int256,
            int256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        return dividendTracker.getAccount(account);
    }

    function getAccountDividendsInfoAtIndex(
        uint256 index
    )
        external
        view
        returns (
            address,
            int256,
            int256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        return dividendTracker.getAccountAtIndex(index);
    }

    function processDividendTracker(uint256 gas) external {
        (
            uint256 iterations,
            uint256 claims,
            uint256 lastProcessedIndex
        ) = dividendTracker.process(gas);
        emit ProcessedDividendTracker(
            iterations,
            claims,
            lastProcessedIndex,
            false,
            gas,
            tx.origin
        );
    }

    function claim() external {
        dividendTracker.processAccount(payable(msg.sender), false);
    }

    function getLastProcessedIndex() external view returns (uint256) {
        return dividendTracker.getLastProcessedIndex();
    }

    function getNumberOfDividendTokenHolders() external view returns (uint256) {
        return dividendTracker.getNumberOfTokenHolders();
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "Can not transfer from the zero address");
        require(to != address(0), "Can not transfer to the zero address");

        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        bool localSwapping = swapping;
        uint256 localTotalFees = totalFees;

        bool canSwap = balanceOf(address(this)) >= swapTokensAtAmount;

        if (
            canSwap &&
            !localSwapping &&
            !automatedMarketMakerPairs[from] &&
            from != owner() &&
            to != owner() &&
            localTotalFees > 0
        ) {
            swap();
        }

        bool takeFee = !localSwapping &&
            !_isExcludedFromFees[from] &&
            !_isExcludedFromFees[to] &&
            localTotalFees > 0;

        if (takeFee) {
            uint256 fees = (amount * localTotalFees) / 100;

            amount = amount - fees;

            super._transfer(from, address(this), fees);
        }

        super._transfer(from, to, amount);

        try
            dividendTracker.setBalance(payable(from), balanceOf(from))
        {} catch {}
        try dividendTracker.setBalance(payable(to), balanceOf(to)) {} catch {}

        if (localSwapping) return;

        try dividendTracker.process(gasForProcessing) returns (
            uint256 iterations,
            uint256 claims,
            uint256 lastProcessedIndex
        ) {
            emit ProcessedDividendTracker(
                iterations,
                claims,
                lastProcessedIndex,
                true,
                gasForProcessing,
                tx.origin
            );
        } catch {
            emit ProcessDividendTrackerFailed();
        }
    }

    function swap() private lockTheSwap {
        uint256 amount = swapTokensAtAmount;

        uint256 localTotalFees = totalFees;

        uint256 swapTokens = (amount * liquidityFee) / localTotalFees;

        if (swapTokens > 0) swapAndLiquify(swapTokens);

        uint256 marketingTokens = (amount * marketingFee) / localTotalFees;

        uint256 dividendTokens = amount - marketingTokens - swapTokens;

        uint256 totalTokens = marketingTokens + dividendTokens;

        uint256 swappedAmount = swapTokensForReward(totalTokens);

        uint256 marketingShare = (swappedAmount * marketingTokens) /
            totalTokens;

        if (marketingShare > 0)
            IERC20(rewardToken).transfer(
                marketingWalletAddress,
                marketingShare
            );

        if (tokenRewardsFee > 0) swapAndSendDividends();
    }

    function swapAndLiquify(uint256 tokens) private {
        uint256 half = tokens / 2;
        uint256 otherHalf = tokens - half;

        uint256 initialBalance = address(this).balance;

        swapTokensForEth(half);

        uint256 newBalance = address(this).balance - initialBalance;

        if (newBalance == 0) return;

        addLiquidity(otherHalf, newBalance);

        emit SwapAndLiquify(half, newBalance, otherHalf);
    }

    function swapTokensForEth(uint256 tokenAmount) private {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = getNativeCurrency();

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        if (block.chainid == 61) {
            //etc
            try
                uniswapV2Router
                    .swapExactTokensForETCSupportingFeeOnTransferTokens(
                        tokenAmount,
                        0,
                        path,
                        address(this),
                        block.timestamp
                    )
            {} catch {
                emit SwapTokensForEthFailed(tokenAmount);
            }
        } else if (block.chainid == 42262) {
            //oasis
            try
                uniswapV2Router
                    .swapExactTokensForROSESupportingFeeOnTransferTokens(
                        tokenAmount,
                        0,
                        path,
                        address(this),
                        block.timestamp
                    )
            {} catch {
                emit SwapTokensForEthFailed(tokenAmount);
            }
        } else if (block.chainid == 43114 || block.chainid == 43113) {
            //avalance
            try
                uniswapV2Router
                    .swapExactTokensForAVAXSupportingFeeOnTransferTokens(
                        tokenAmount,
                        0,
                        path,
                        address(this),
                        block.timestamp
                    )
            {} catch {
                emit SwapTokensForEthFailed(tokenAmount);
            }
        } else {
            try
                uniswapV2Router
                    .swapExactTokensForETHSupportingFeeOnTransferTokens(
                        tokenAmount,
                        0,
                        path,
                        address(this),
                        block.timestamp
                    )
            {} catch {
                emit SwapTokensForEthFailed(tokenAmount);
            }
        }
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        _approve(address(this), address(uniswapV2Router), tokenAmount);

        if (block.chainid == 61) {
            try
                uniswapV2Router.addLiquidityETC{value: ethAmount}(
                    address(this),
                    tokenAmount,
                    0,
                    0,
                    address(0xdead),
                    block.timestamp
                )
            {} catch {
                emit AddLiquidityFailed(ethAmount);
            }
        } else if (block.chainid == 42262) {
            try
                uniswapV2Router.addLiquidityROSE{value: ethAmount}(
                    address(this),
                    tokenAmount,
                    0,
                    0,
                    address(0xdead),
                    block.timestamp
                )
            {} catch {
                emit AddLiquidityFailed(ethAmount);
            }
        } else if (block.chainid == 43114 || block.chainid == 43113) {
            try
                uniswapV2Router.addLiquidityAVAX{value: ethAmount}(
                    address(this),
                    tokenAmount,
                    0,
                    0,
                    address(0xdead),
                    block.timestamp
                )
            {} catch {
                emit AddLiquidityFailed(ethAmount);
            }
        } else {
            try
                uniswapV2Router.addLiquidityETH{value: ethAmount}(
                    address(this),
                    tokenAmount,
                    0,
                    0,
                    address(0xdead),
                    block.timestamp
                )
            {} catch {
                emit AddLiquidityFailed(ethAmount);
            }
        }
    }

    function swapTokensForReward(
        uint256 tokenAmount
    ) private returns (uint256) {
        address[] memory path = new address[](3);
        path[0] = address(this);
        path[1] = getNativeCurrency();
        path[2] = rewardToken;

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        IERC20 localRewardToken = IERC20(rewardToken);

        uint256 balance = localRewardToken.balanceOf(address(this));

        try
            uniswapV2Router
                .swapExactTokensForTokensSupportingFeeOnTransferTokens(
                    tokenAmount,
                    0,
                    path,
                    address(this),
                    block.timestamp
                )
        {
            return localRewardToken.balanceOf(address(this)) - balance;
        } catch {
            emit SwapTokensForRewardFailed(tokenAmount);
            return 0;
        }
    }

    function swapAndSendDividends() private {
        IERC20 localRewardToken = IERC20(rewardToken);

        uint256 dividends = localRewardToken.balanceOf(address(this));

        if (dividends == 0) return;

        bool success = localRewardToken.transfer(
            address(dividendTracker),
            dividends
        );

        if (success) {
            dividendTracker.distributeCAKEDividends(dividends);
            emit SendDividends(dividends);
        }
    }
}