/**
 *Submitted for verification at Etherscan.io on 2024-02-24
*/

//SPDX-License-Identifier: MIT Licensed
pragma solidity ^0.8.17;

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 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(address _newOwner) {
        _transferOwnership(_newOwner);
    }

    /**
     * @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");
        _;
    }

    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);
    }
}

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

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

    function decimals() external view returns (uint8);

    function totalSupply() external view returns (uint256);

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

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

    function approve(address spender, uint256 value) external;

    function transfer(address to, uint256 value) external;

    function transferFrom(address from, address to, uint256 value) external;

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

interface AggregatorV3Interface {
    function decimals() external view returns (uint8);

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

    function version() external view returns (uint256);

    function getRoundData(
        uint80 _roundId
    )
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );

    function latestRoundData()
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );
}

contract Presale is Ownable {
    IERC20 public mainToken;
    IERC20 public USDT = IERC20(0xdAC17F958D2ee523a2206206994597C13D831ec7);

    AggregatorV3Interface public priceFeed;

    struct Phase {
        uint256 tokensToSell;
        uint256 totalSoldTokens;
        uint256 tokenPerUsdPrice;
    }
    mapping(uint256 => Phase) public phases;

    uint256 public totalStages;
    uint256 public currentStage;
    uint256 public totalUsers;
    uint256 public soldToken;
    uint256 public amountRaised;
    uint256 public amountRaisedUSDT;
    address payable public fundReceiver;
    uint256 tokenDecimals;
    uint256[] tokensToSell;
    uint256[] tokenPerUsdPrice;

    bool public presaleStatus;
    bool public isPresaleEnded;

    address[] public UsersAddresses;

    mapping(address => bool) public oldBuyer;
    struct User {
        uint256 native_balance;
        uint256 usdt_balance;
        uint256 token_balance;
        uint256 claimed_tokens;
    }

    mapping(address => User) public users;

    struct Transaction {
        uint256 trxAt;
        uint256 presaleId;
        uint256 buyAmount;
        uint256 tokenAmount;
        bool isEther;
    }

    struct TopBuyer {
        address userAddress;
        uint256 tokenAmount;
    }
    TopBuyer[3] public topBuyersData;
    Transaction[] public transactionsHistory;

    event BuyToken(address indexed _user, uint256 indexed _amount);
    event ClaimToken(address indexed _user, uint256 indexed _amount);
    event UpdatePrice(uint256 _oldPrice, uint256 _newPrice);

    constructor(IERC20 _token, address _fundReceiver) Ownable(msg.sender) {
        mainToken = _token;
        fundReceiver = payable(_fundReceiver);
        priceFeed = AggregatorV3Interface(
            0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419
        );
        tokenDecimals = mainToken.decimals();
        tokensToSell = [
            250_000_000 * 10 ** tokenDecimals,
            250_000_000 * 10 ** tokenDecimals,
            250_000_000 * 10 ** tokenDecimals,
            250_000_000 * 10 ** tokenDecimals,
            250_000_000 * 10 ** tokenDecimals,
            250_000_000 * 10 ** tokenDecimals
        ];
        tokenPerUsdPrice = [
            2500 * (10 ** tokenDecimals),
            2000 * (10 ** tokenDecimals),
            1666 * (10 ** tokenDecimals),
            1428 * (10 ** tokenDecimals),
            1250 * (10 ** tokenDecimals),
            1111 * (10 ** tokenDecimals)
        ];
        for (uint256 i = 0; i < tokensToSell.length; i++) {
            phases[i].tokensToSell = tokensToSell[i];
            phases[i].tokenPerUsdPrice = tokenPerUsdPrice[i];
        }
        totalStages = tokensToSell.length;
    }

    // to get real time price of BNB
    function getLatestPrice() public view returns (uint256) {
        (, int256 price, , , ) = priceFeed.latestRoundData();
        return uint256(price);
    }

    // to buy token during preSale time with BNB => for web3 use

    function buyToken() public payable {
        require(!isPresaleEnded, "Presale ended!");
        require(presaleStatus, " Presale is Paused, check back later");
        if (!oldBuyer[msg.sender]) {
            totalUsers += 1;
            UsersAddresses.push(msg.sender);
        }
        fundReceiver.transfer(msg.value);

        uint256 numberOfTokens;
        numberOfTokens = nativeToToken(msg.value, currentStage);
        require(
            phases[currentStage].totalSoldTokens + numberOfTokens <=
                phases[currentStage].tokensToSell,
            "Phase Limit Reached"
        );
        soldToken = soldToken + (numberOfTokens);
        amountRaised = amountRaised + BnbToUsd(msg.value);

        users[msg.sender].native_balance =
            users[msg.sender].native_balance +
            (msg.value);
        users[msg.sender].token_balance =
            users[msg.sender].token_balance +
            (numberOfTokens);
        phases[currentStage].totalSoldTokens += numberOfTokens;
        oldBuyer[msg.sender] = true;

        updateTopBuyerData(msg.sender, users[msg.sender].token_balance);
        updateTransactionHistory(currentStage, msg.value, numberOfTokens, true);
    }

    // to buy token during preSale time with USDT => for web3 use
    function buyTokenUSDT(uint256 amount) public {
        require(!isPresaleEnded, "Presale ended!");
        require(presaleStatus, " Presale is Paused, check back later");
        if (!oldBuyer[msg.sender]) {
            totalUsers += 1;
            UsersAddresses.push(msg.sender);
        }
        USDT.transferFrom(msg.sender, fundReceiver, amount);

        uint256 numberOfTokens;
        numberOfTokens = usdtToToken(amount, currentStage);
        require(
            phases[currentStage].totalSoldTokens + numberOfTokens <=
                phases[currentStage].tokensToSell,
            "Phase Limit Reached"
        );
        soldToken = soldToken + numberOfTokens;
        amountRaisedUSDT = amountRaisedUSDT + amount;

        users[msg.sender].usdt_balance += amount;

        users[msg.sender].token_balance =
            users[msg.sender].token_balance +
            numberOfTokens;
        phases[currentStage].totalSoldTokens += numberOfTokens;
        oldBuyer[msg.sender] = true;

        updateTopBuyerData(msg.sender, users[msg.sender].token_balance);
        updateTransactionHistory(currentStage, amount, numberOfTokens, false);
    }

    function updateTopBuyerData(address _user, uint256 _tokenAmount) internal {
        // Check if the user is already in the top buyers
        for (uint256 i = 0; i < topBuyersData.length; i++) {
            if (_user == topBuyersData[i].userAddress) {
                topBuyersData[i].tokenAmount = _tokenAmount;
                return;
            }
        }

        for (uint256 i = 0; i < topBuyersData.length; i++) {
            if (_tokenAmount > topBuyersData[i].tokenAmount) {
                for (uint256 j = topBuyersData.length - 1; j > i; j--) {
                    topBuyersData[j] = topBuyersData[j - 1];
                }

                topBuyersData[i] = TopBuyer(_user, _tokenAmount);
                break;
            }
        }
    }

    function updateTransactionHistory(
        uint256 _presaleId,
        uint256 _buyAmount,
        uint256 _noOfTokens,
        bool _isEthTrx
    ) internal {
        Transaction memory newTransaction = Transaction(
            block.timestamp,
            _presaleId,
            _buyAmount,
            _noOfTokens,
            _isEthTrx
        );
        transactionsHistory.push(newTransaction);
        if (transactionsHistory.length > 20) {
            for (uint256 i = 0; i < transactionsHistory.length - 1; i++) {
                transactionsHistory[i] = transactionsHistory[i + 1];
            }
            transactionsHistory.pop();
        }
    }

    function claimTokens() external {
        require(isPresaleEnded, "Presale has not ended yet");
        User storage user = users[msg.sender];
        require(user.token_balance > 0, "No tokens purchased");
        uint256 claimableTokens = user.token_balance - user.claimed_tokens;
        require(claimableTokens > 0, "No tokens to claim");
        user.claimed_tokens += claimableTokens;
        mainToken.transfer(msg.sender, claimableTokens);
        emit ClaimToken(msg.sender, claimableTokens);
    }

    function getPhaseDetail(
        uint256 phaseInd
    )
        external
        view
        returns (uint256 tokenToSell, uint256 soldTokens, uint256 priceUsd)
    {
        Phase memory phase = phases[phaseInd];
        return (
            phase.tokensToSell,
            phase.totalSoldTokens,
            phase.tokenPerUsdPrice
        );
    }

    function setPresaleStatus(bool _status) external onlyOwner {
        presaleStatus = _status;
    }

    function endPresale() external onlyOwner {
        isPresaleEnded = true;
    }

    // to check number of token for given BNB
    function nativeToToken(
        uint256 _amount,
        uint256 phaseId
    ) public view returns (uint256) {
        uint256 bnbToUsd = (_amount * (getLatestPrice())) / (1 ether);
        uint256 numberOfTokens = (bnbToUsd * phases[phaseId].tokenPerUsdPrice) /
            (1e8);
        return numberOfTokens;
    }

    // BNB to USD
    function BnbToUsd(uint256 _amount) public view returns (uint256) {
        uint256 bnbToUsd = (_amount * (getLatestPrice())) / (1e8);
        return bnbToUsd;
    }

    // to check number of token for given usdt
    function usdtToToken(
        uint256 _amount,
        uint256 phaseId
    ) public view returns (uint256) {
        uint256 numberOfTokens = (_amount * phases[phaseId].tokenPerUsdPrice) /
            (10 ** USDT.decimals());
        return numberOfTokens;
    }

    function updateInfos(
        uint256 _sold,
        uint256 _raised,
        uint256 _raisedInUsdt
    ) external onlyOwner {
        soldToken = _sold;
        amountRaised = _raised;
        amountRaisedUSDT = _raisedInUsdt;
    }

    // change tokens
    function updateToken(address _token) external onlyOwner {
        mainToken = IERC20(_token);
    }

    function whitelistEthAddresses(
        address[] memory _addresses,
        uint256[] memory _tokenAmount
    ) external onlyOwner {
        require(
            _addresses.length == _tokenAmount.length,
            "Addresses and amounts must be equal"
        );

        for (uint256 i = 0; i < _addresses.length; i++) {
            users[_addresses[i]].token_balance += _tokenAmount[i];
        }
    }

    //change tokens for buy
    function updateStableTokens(IERC20 _USDT) external onlyOwner {
        USDT = IERC20(_USDT);
    }

    // to withdraw funds for liquidity
    function initiateTransfer(uint256 _value) external onlyOwner {
        fundReceiver.transfer(_value);
    }

    function totalUsersCount() external view returns (uint256) {
        return UsersAddresses.length;
    }

    // to withdraw funds for liquidity
    function changeFundReciever(address _addr) external onlyOwner {
        fundReceiver = payable(_addr);
    }

    // to withdraw funds for liquidity
    function updatePriceFeed(
        AggregatorV3Interface _priceFeed
    ) external onlyOwner {
        priceFeed = _priceFeed;
    }

    // funtion is used to change the stage of presale
    function setCurrentPhase(uint256 _stageNum) public onlyOwner {
        currentStage = _stageNum;
    }

    // to withdraw out tokens
    function transferStuckTokens(
        IERC20 token,
        uint256 _value
    ) external onlyOwner {
        token.transfer(msg.sender, _value);
    }
}

// Dependency file: @openzeppelin/contracts/token/ERC20/IERC20.sol

// SPDX-License-Identifier: MIT

// pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @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);
}


// Dependency file: @openzeppelin/contracts/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;
    }
}


// Dependency file: @openzeppelin/contracts/access/Ownable.sol


// pragma solidity ^0.8.0;

// import "@openzeppelin/contracts/utils/Context.sol";

/**
 * @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() {
        _setOwner(_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 {
        _setOwner(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");
        _setOwner(newOwner);
    }

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


// Dependency file: @openzeppelin/contracts/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 no longer needed starting with Solidity 0.8. 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;
        }
    }
}


// Dependency file: contracts/BaseToken.sol

// pragma solidity =0.8.4;

enum TokenType {
    standard,
    antiBotStandard,
    liquidityGenerator,
    antiBotLiquidityGenerator,
    baby,
    antiBotBaby,
    buybackBaby,
    antiBotBuybackBaby
}

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


// Root file: contracts/standard/StandardToken.sol

pragma solidity =0.8.4;

// import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
// import "@openzeppelin/contracts/access/Ownable.sol";
// import "@openzeppelin/contracts/utils/math/SafeMath.sol";
// import "contracts/BaseToken.sol";

contract StandardToken is IERC20, Ownable, BaseToken {
    using SafeMath for uint256;

    uint256 public constant VERSION = 1;

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

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

    constructor(
        string memory name_,
        string memory symbol_,
        uint8 decimals_,
        uint256 totalSupply_,
        address serviceFeeReceiver_,
        uint256 serviceFee_
    ) payable {
        _name = name_;
        _symbol = symbol_;
        _decimals = decimals_;
        _mint(owner(), totalSupply_);

        emit TokenCreated(owner(), address(this), TokenType.standard, VERSION);

        payable(serviceFeeReceiver_).transfer(serviceFee_);
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account)
        public
        view
        virtual
        override
        returns (uint256)
    {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount)
        public
        virtual
        override
        returns (bool)
    {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender)
        public
        view
        virtual
        override
        returns (uint256)
    {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount)
        public
        virtual
        override
        returns (bool)
    {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            _msgSender(),
            _allowances[sender][_msgSender()].sub(
                amount,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue)
        public
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].add(addedValue)
        );
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue)
        public
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].sub(
                subtractedValue,
                "ERC20: decreased allowance below zero"
            )
        );
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    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);

        _balances[sender] = _balances[sender].sub(
            amount,
            "ERC20: transfer amount exceeds balance"
        );
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

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

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

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

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

        _balances[account] = _balances[account].sub(
            amount,
            "ERC20: burn amount exceeds balance"
        );
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    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);
    }

    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal virtual {
        _decimals = decimals_;
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}