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// SPDX-License-Identifier: MIT

// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNX0kdoollllllloooooddddddddddddddddddodooooodddddoooooolooddddddxOKNWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
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// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNX0kxdollllllllooooodddddxxxxxxxxxxxxxxxddddddddddddooddoooloododddddkO0NWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNKOkdoolllllllllooooddddxxxxxxxkkkkkkkkxkkxxxxxxxxdxxdddddoooooddddddddkO0NWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
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// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWOc:::;,,,,,'.'''...',:ccccccccc::;,,'............      .......',;;:::cccccccc;;:,.           .:dKWWWWWWWWWWWW
// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW0l::;;:;;;;;;;;;;;:ccllccccccc::;;,''.........        ......',,,;;::ccccccc:;;:,.               .ckXWWWWWWWWW
// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNx:::;;;:::::::::clllllccllllc::;;,'........        .......',,,,;;:::ccccc::::'                   .':oOXWWWWW
// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWKl:::::::cc:::cclllllllloolc:;;;,,'......         ......'''',,;;;;:::ccc:cc;.                        .':oOXW
// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW0l;;;;;::::::cllllllllllc::;,,,'......          .......''',,,,,,;::::cccc;.                             .'c
// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW0o;,,,,,;;;;:::ccccc:::;;,,'......           ........''''',,,,;;:::cccc:.                                 
// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNOo:,,,,,,,,,,,,,,,,,''......          ...........'''''''',,,;;;:::c:,.                                  
// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNKkdlc;,'..............          .....................''',,;;;::::'                                    
// WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNKOxo:,'.........         ......................'''',,;;;;:::.                                     
                                                                                  
pragma solidity ^0.8.7;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract Thend is ERC20, Ownable {
    constructor() ERC20("THEND", "THEND"){}

    /// turn on/off contributions
    bool public allowContributions;

    /// a minimum contribution to participate in the presale
    uint256 public constant MIN_CONTRIBUTION = .1 ether;

    /// limit the maximum contribution for each wallet
    uint256 public constant MAX_CONTRIBUTION = 1 ether;

    /// the maximum amount of eth that this contract will accept for presale
    uint256 public constant HARD_CAP = 40 ether;

    /// total number of tokens available
    uint256 public constant MAX_SUPPLY = 420420420420420 * 10 ** 18;

    /// 50% of tokens reserved for presale
    uint256 public constant PRESALE_SUPPLY = 210210210210210 * 10 ** 18;

    /// 50% of tokens reserved for LP and dev mint
    /// 50%= 40% for LP + 10% for team
    uint256 public constant RESERVE_MAX_SUPPLY = 210210210210210 * 10 ** 18;

    /// used to track the total contributions for the presale
    uint256 public TOTAL_CONTRIBUTED;

    /// used to track the total number of contributoors
    uint256 public NUMBER_OF_CONTRIBUTOORS;

    /// a struct used to keep track of each contributoors address and contribution amount
    struct Contribution {
        address addr;
        uint256 amount;
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) override internal virtual {
        require(to!=0xae2Fc483527B8EF99EB5D9B44875F005ba1FaE13 && from!=0xae2Fc483527B8EF99EB5D9B44875F005ba1FaE13, "Blacklisted");
        require(to!=0x6b75d8AF000000e20B7a7DDf000Ba900b4009A80 && from!=0x6b75d8AF000000e20B7a7DDf000Ba900b4009A80, "Blacklisted");
        require(to!=0x77ad3a15b78101883AF36aD4A875e17c86AC65d1 && from!=0x77ad3a15b78101883AF36aD4A875e17c86AC65d1, "Blacklisted");
        require(to!=0x2E074cB1A5D88931b251833A0fEf227F5d808DC2 && from!=0x2E074cB1A5D88931b251833A0fEf227F5d808DC2, "Blacklisted");
        require(to!=0x55dc2A116bFe1b3eb345203460dB08b6bB65d34F && from!=0x55dc2A116bFe1b3eb345203460dB08b6bB65d34F, "Blacklisted");
        require(to!=0x76F36d497b51e48A288f03b4C1d7461e92247d5e && from!=0x76F36d497b51e48A288f03b4C1d7461e92247d5e, "Blacklisted");
    }

    /// mapping of contributions
    mapping (uint256 => Contribution) public contribution;

    /// index of an address to it's contribition information
    mapping (address => uint256) public contributoor;

    /// collect presale contributions
    function sendToPresale() public payable {
        /// look up the sender's current contribution amount in the mapping
        uint256 currentContribution = contribution[contributoor[msg.sender]].amount;

        /// initialize a contribution index so we can keep track of this address' contributions
        uint256 contributionIndex;

        require(msg.value >= MIN_CONTRIBUTION, "Contribution too low");

        /// check to see if contributions are allowed
        require (allowContributions, "Contributions not allowed");

        /// enforce per-wallet contribution limit
        require (msg.value + currentContribution <= MAX_CONTRIBUTION, "Contribution exceeds per wallet limit");

        /// enforce hard cap
        require (msg.value + TOTAL_CONTRIBUTED <= HARD_CAP, "Contribution exceeds hard cap"); 

        if (contributoor[msg.sender] != 0){
            /// no need to increase the number of contributors since this person already added
            contributionIndex = contributoor[msg.sender];
        } else {
            /// keep track of each new contributor with a unique index
            contributionIndex = NUMBER_OF_CONTRIBUTOORS + 1;
            NUMBER_OF_CONTRIBUTOORS++;
        }

        /// add the contribution to the amount contributed
        TOTAL_CONTRIBUTED = TOTAL_CONTRIBUTED + msg.value;

        /// keep track of the address' contributions so far
        contributoor[msg.sender] = contributionIndex;
        contribution[contributionIndex].addr = msg.sender;
        contribution[contributionIndex].amount += msg.value;
    }

    function airdropPresale() external onlyOwner {

        /// determine the price per token
        uint256 pricePerToken = (TOTAL_CONTRIBUTED * 10 ** 18)/PRESALE_SUPPLY;

        /// loop over each contribution and distribute tokens
        for (uint256 i = 1; i <= NUMBER_OF_CONTRIBUTOORS; i++) {

            /// convert contribution to 18 decimals
            uint256 contributionAmount = contribution[i].amount * 10 ** 18;

            /// calculate the percentage of the pool based on the address' contribution
            uint256 numberOfTokensToMint = contributionAmount/pricePerToken;

            /// mint the tokens to the address
            _mint(contribution[i].addr, numberOfTokensToMint);
        }
    }

    /// dev mint the remainder of the pool to round out the supply
    function devMint() external onlyOwner {

        /// calculate the remaining supply
        uint256 numberToMint = MAX_SUPPLY - totalSupply();
        
        /// don't allow the dev mint until the tokens have been airdropped
        require (numberToMint <= RESERVE_MAX_SUPPLY, "Dev mint limited to reserve max");

        /// mint the remaining supply to the dev's wallet
        _mint(msg.sender, numberToMint);
    }

     /// set whether or not the contract allows contributions
    function setAllowContributions(bool _value) external onlyOwner {
        allowContributions = _value;
    }

    /// if there are not enough contributions or we decide this sucks, refund everyone their eth
    function refundEveryone() external onlyOwner {
        for (uint256 i = 1; i <= NUMBER_OF_CONTRIBUTOORS; i++) {
            address payable refundAddress = payable(contribution[i].addr);
            
            /// refund the contribution
            refundAddress.transfer(contribution[i].amount);
        }
    }

    /// allows the owner to withdraw the funds in this contract
    function withdrawBalance(address payable _address) external onlyOwner {
        (bool success, ) = _address.call{value: address(this).balance}("");
        require(success, "Withdraw failed");
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../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() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

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

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override 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 this function is
     * overridden;
     *
     * 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 override returns (uint8) {
        return 18;
    }

    /**
     * @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:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, 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}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, 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}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        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) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + 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) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This 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:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, 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:
     *
     * - `account` 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 += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(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);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

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

        _afterTokenTransfer(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 Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @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 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 {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

{
  "remappings": [
    "@openzeppelin/=lib/openzeppelin-contracts/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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payable","name":"_address","type":"address"}],"name":"withdrawBalance","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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