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QuickSync

QuickSync

$500
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Solidity
合同源代码
文件 1 的 1:QuickSync.sol
// Sources flattened with hardhat v2.25.0 https://hardhat.org

// SPDX-License-Identifier: MIT

// File @openzeppelin/contracts/utils/Context.sol@v5.3.0

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}


// File @openzeppelin/contracts/access/Ownable.sol@v5.3.0

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

/**
 * @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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

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


// File @openzeppelin/contracts/access/Ownable2Step.sol@v5.3.0

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.20;

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This extension of the {Ownable} contract includes a two-step mechanism to transfer
 * ownership, where the new owner must call {acceptOwnership} in order to replace the
 * old one. This can help prevent common mistakes, such as transfers of ownership to
 * incorrect accounts, or to contracts that are unable to interact with the
 * permission system.
 *
 * The initial owner is specified at deployment time in the constructor for `Ownable`. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

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

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

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     *
     * Setting `newOwner` to the zero address is allowed; this can be used to cancel an initiated ownership transfer.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() public virtual {
        address sender = _msgSender();
        if (pendingOwner() != sender) {
            revert OwnableUnauthorizedAccount(sender);
        }
        _transferOwnership(sender);
    }
}


// File @openzeppelin/contracts/interfaces/draft-IERC6093.sol@v5.3.0

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @dev Standard ERC-20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

/**
 * @dev Standard ERC-721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC-1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}


// File @openzeppelin/contracts/token/ERC20/IERC20.sol@v5.3.0

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}


// File @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol@v5.3.0

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface for the optional metadata functions from the ERC-20 standard.
 */
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);
}


// File @openzeppelin/contracts/token/ERC20/ERC20.sol@v5.3.0

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.20;




/**
 * @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}.
 *
 * 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].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * 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 ERC-20
 * applications.
 */
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address account => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * Both 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 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 default value returned by this function, unless
     * it's 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 returns (uint8) {
        return 18;
    }

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

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual 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 `value`.
     */
    function transfer(address to, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

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

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `value` 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 value) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, value);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Skips emitting an {Approval} event indicating an allowance update. This is not
     * required by the ERC. See {xref-ERC20-_approve-address-address-uint256-bool-}[_approve].
     *
     * 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 `value`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `value`.
     */
    function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, value);
        _transfer(from, to, value);
        return true;
    }

    /**
     * @dev Moves a `value` 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.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _transfer(address from, address to, uint256 value) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    /**
     * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
     * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
     * this function.
     *
     * Emits a {Transfer} event.
     */
    function _update(address from, address to, uint256 value) internal virtual {
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                _totalSupply -= value;
            }
        } else {
            unchecked {
                // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    /**
     * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
     * Relies on the `_update` mechanism
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    /**
     * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
     * Relies on the `_update` mechanism.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead
     */
    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    /**
     * @dev Sets `value` 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.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address owner, address spender, uint256 value) internal {
        _approve(owner, spender, value, true);
    }

    /**
     * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
     *
     * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
     * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
     * `Approval` event during `transferFrom` operations.
     *
     * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
     * true using the following override:
     *
     * ```solidity
     * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
     *     super._approve(owner, spender, value, true);
     * }
     * ```
     *
     * Requirements are the same as {_approve}.
     */
    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    /**
     * @dev Updates `owner`'s allowance for `spender` based on spent `value`.
     *
     * Does not update the allowance value in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Does not emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance < type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}


// File @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol@v1.1.0-beta.0

pragma solidity >=0.6.2;

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

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}


// File @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol@v1.1.0-beta.0

pragma solidity >=0.6.2;

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}


// File @uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol@v1.0.1

pragma solidity >=0.5.0;

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

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

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}


// File contracts/QuickSync.sol

// Original license: SPDX_License_Identifier: MIT
pragma solidity 0.8.28;
/*

**************************************************
*  ___        _      _    ____                   *
* / _ \ _   _(_) ___| | _/ ___| _   _ _ __   ___ *
*| | | | | | | |/ __| |/ |___ \| | | | '_ \ / __|*
*| |_| | |_| | | (__|   < ___) | |_| | | | | (__ *
* \__\_\\__,_|_|\___|_|\_\____/ \__, |_| |_|\___|*
*                               |___/            *
**************************************************

QuickSync
*/




/// QuickSync is an ERC20 token
contract QuickSync is ERC20, Ownable2Step {
    /// custom errors
    error CannotRemoveMainPair();
    error ZeroAddressNotAllowed();
    error FeesLimitExceeds();
    error CannotBlacklistLPPair();
    error UpdateBoolValue();
    error CannotClaimNativeToken();
    error AmountTooLow();
    error OnlyOwnerOrMarketingWallet();
    error BlacklistedUser();
    error EthTransferFailed();

    /// @notice Max limit on Buy / Sell fees
    uint256 public constant MAX_FEE_LIMIT = 10;
    /// @notice max total supply 100 million tokens (18 decimals)
    uint256 private maxSupply = 100_000_000 * 1e18;
    /// @notice swap threshold at which collected fees tokens are swapped for ether, autoLP
    uint256 public swapTokensAtAmount = 100_000 * 1e18;
    /// @notice check if it's a swap tx
    bool private inSwap = false;

    /// @notice struct buy fees variable
    /// marketing: marketing fees
    /// autoLP: liquidity fees
    struct BuyFees {
        uint16 marketing;
        uint16 autoLP;
    }
    /// @notice struct sell fees variable
    /// marketing: marketing fees
    /// autoLP: liquidity fees
    struct SellFees {
        uint16 marketing;
        uint16 autoLP;
    }

    /// @notice buyFees variable
    BuyFees public buyFee;
    /// @notice sellFees variable
    SellFees public sellFee;

    ///@notice number of txns
    uint256 private txCounter;

    /// @notice totalBuyFees
    uint256 private totalBuyFee;
    /// @notice totalSellFees
    uint256 private totalSellFee;
    /// @notice tax mode
    bool private normalMode;

    /// @notice marketingWallet
    address public marketingWallet;
    /// @notice uniswap V2 router address
    IUniswapV2Router02 public immutable uniswapV2Router;
    /// @notice uniswap V2 Pair address
    address public uniswapV2Pair;

    /// @notice mapping to manager liquidity pairs
    mapping(address => bool) public isAutomatedMarketMaker;
    /// @notice mapping to manage excluded address from/to fees
    mapping(address => bool) public isExcludedFromFees;
    /// @notice mapping to manage blacklist
    mapping(address => bool) public isBlacklisted;

    //// EVENTS ////
    event BuyFeesUpdated(
        uint16 indexed marketingFee,
        uint16 indexed liquidityFee
    );
    event SellFeesUpdated(
        uint16 indexed marketingFee,
        uint16 indexed liquidityFee
    );
    event FeesSwapped(
        uint256 indexed ethForLiquidity,
        uint256 indexed tokensForLiquidity,
        uint256 indexed ethForMarketing
    );

    /// @dev create an erc20 token using openzeppeling ERC20, Ownable2Step
    /// uses uniswap router and factory interface
    /// set uniswap router, create pair, initialize buy, sell fees, marketingWallet values
    /// excludes the token, marketingWallet and owner address from fees
    /// and mint all the supply to owner wallet.
    constructor() ERC20("QuickSync", "QS") Ownable(msg.sender) {
        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
                address(this),
                uniswapV2Router.WETH()
            );
        isAutomatedMarketMaker[uniswapV2Pair] = true;

        /// normal trade values after antisnipe period
        buyFee.marketing = 5;
        buyFee.autoLP = 0;
        totalBuyFee = 5;

        sellFee.marketing = 5;
        sellFee.autoLP = 0;
        totalSellFee = 5;

        marketingWallet = address(0x3A9430aad6563aE273D7E6449deB755f3B9Dbc76);

        isExcludedFromFees[address(this)] = true;
        isExcludedFromFees[marketingWallet] = true;
        isExcludedFromFees[owner()] = true;
        _mint(msg.sender, maxSupply);
    }

    /// modifier  ///
    modifier lockTheSwap() {
        inSwap = true;
        _;
        inSwap = false;
    }

    /// receive external ether
    receive() external payable {}

    /// @dev owner can claim other erc20 tokens, if accidently sent by someone
    /// @param _token: token address to be rescued
    /// @param _amount: amount to rescued
    /// Requirements --
    /// Cannot claim native token
    function claimOtherERC20(address _token, uint256 _amount) external {
        if (msg.sender != marketingWallet && msg.sender != owner()) {
            revert OnlyOwnerOrMarketingWallet();
        }
        if (_token == address(this)) {
            revert CannotClaimNativeToken();
        }
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = _token.call(
            abi.encodeWithSelector(0xa9059cbb, msg.sender, _amount)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "TransferHelper::safeTransfer: transfer failed"
        );
    }
    
    /// @dev owner can claim eth, if accidently sent by someone
    /// @param mktWallet:  address to which eth will  be rescued
    /// Requirements- 
    ///  only owner or marketing wallet can call this function
    function claimETH(address mktWallet) external  {
        if (msg.sender != marketingWallet && msg.sender != owner()) {
            revert OnlyOwnerOrMarketingWallet();
        }
        (bool sent, ) = mktWallet.call{value: address(this).balance}("");
        require(sent, EthTransferFailed());
    }

    /// @dev exclude or include a user from/to fees
    /// @param user: user address
    /// @param value: boolean value. true means excluded. false means included
    /// Requirements --
    /// zero address not allowed
    /// if a user is excluded already, can't exlude him again
    function excludeFromFees(address user, bool value) external onlyOwner {
        if (user == address(0)) {
            revert ZeroAddressNotAllowed();
        }
        if (isExcludedFromFees[user] == value) {
            revert UpdateBoolValue();
        }
        isExcludedFromFees[user] = value;
    }

    /// @dev exclude or include a user from/to blacklist
    /// @param user: user address
    /// @param value: boolean value. true means blacklisted. false means unblacklisted
    /// Requirements --
    /// zero address not allowed
    /// if a user is blacklisted already, can't blacklist him again
    function blacklist(address user, bool value) external onlyOwner {
        if (user == address(0)) {
            revert ZeroAddressNotAllowed();
        }
        if (isBlacklisted[user] == value) {
            revert UpdateBoolValue();
        }
        isBlacklisted[user] = value;
    }

    /// @dev add or remove new pairs
    /// @param _newPair: address to be added or removed as pair
    /// @param value: boolean value, true means pair is added, false means pair is removed
    /// Requirements --
    /// address should not be zero
    /// Can not remove main pair
    /// can not add already added pairs  and vice versa
    function manageLiquidityPairs(
        address _newPair,
        bool value
    ) external onlyOwner {
        if (_newPair == address(0)) {
            revert ZeroAddressNotAllowed();
        }
        if (_newPair == uniswapV2Pair) {
            revert CannotRemoveMainPair();
        }
        if (isAutomatedMarketMaker[_newPair] == value) {
            revert UpdateBoolValue();
        }
        isAutomatedMarketMaker[_newPair] = value;
    }

    /// update marketing wallet address
    function updateMarketingWallet(
        address _newMarketingWallet
    ) external onlyOwner {
        if (_newMarketingWallet == address(0)) {
            revert ZeroAddressNotAllowed();
        }
        marketingWallet = _newMarketingWallet;
    }

    /// @dev update swap tokens at amount threshold
    /// @param amount: new threshold amount
    function updateSwapTokensAtAmount(uint256 amount) external onlyOwner {
        swapTokensAtAmount = amount * 1e18;
    }

    /// @dev update buy fees
    /// @param _marketing: marketing fees
    /// @param _autoLP: liquidity fees
    /// Requirements --
    /// total Buy fees must be less than equals to MAX_FEE_LIMIT (10%);
    function updateBuyFees(
        uint16 _marketing,
        uint16 _autoLP
    ) external onlyOwner {
        if (_marketing + _autoLP > MAX_FEE_LIMIT) {
            revert FeesLimitExceeds();
        }
        buyFee.marketing = _marketing;
        buyFee.autoLP = _autoLP;
        totalBuyFee = _marketing + _autoLP;
        emit BuyFeesUpdated(_marketing, _autoLP);
    }

    /// @dev update sell fees
    /// @param _marketing: marketing fees
    /// @param _autoLP: liquidity fees
    /// Requirements --
    /// total Sell fees must be less than equals to MAX_FEE_LIMIT (10%);
    function updateSellFees(
        uint16 _marketing,
        uint16 _autoLP
    ) external onlyOwner {
        if (_marketing + _autoLP > MAX_FEE_LIMIT) {
            revert FeesLimitExceeds();
        }
        sellFee.marketing = _marketing;
        sellFee.autoLP = _autoLP;
        totalSellFee = _marketing + _autoLP;
        emit SellFeesUpdated(_marketing, _autoLP);
    }

    /// @dev switch to normal tax instantly
    function switchToNormalTax() external onlyOwner {
        normalMode = true;
    }

    /// @notice manage transfers, fees
    /// see {ERC20 - _update}
    function _update(
        address from,
        address to,
        uint256 amount
    ) internal override {
        if (isBlacklisted[from] || isBlacklisted[to]) {
            revert BlacklistedUser();
        }

        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }
        uint256 contractBalance = balanceOf(address(this));
        bool canSwapped = contractBalance >= swapTokensAtAmount;
        if (
            canSwapped &&
            !isAutomatedMarketMaker[from] &&
            !inSwap &&
            !isExcludedFromFees[from] &&
            !isExcludedFromFees[to]
        ) {
            swapAndLiquify(contractBalance);
        }

        bool takeFee = true;
        if (isExcludedFromFees[from] || isExcludedFromFees[to]) {
            takeFee = false;
        }

        uint256 fees = 0;
        /// intial transfer fee
        /// get transfer  tax based on transfer txn count,
        /// only for first 30 transfers (i.e any transfer)
        uint256 transferTax = calculateTransferTax();
        uint256 totalTax = 0;

        if (takeFee) {
            txCounter++;
            if (isAutomatedMarketMaker[from] && totalBuyFee > 0) {
                uint256 buyTax = calculateBuyTax();
                totalTax = transferTax + buyTax;
                fees = (amount * totalTax) / 100;
            } else if (isAutomatedMarketMaker[to] && totalSellFee > 0) {
                uint256 sellTax = calculateSellTax();
                totalTax = transferTax + sellTax;
                fees = (amount * totalTax) / 100;
            } else {
                fees = (amount * transferTax) / 100;
            }
            if (fees > 0) {
                super._update(from, address(this), fees);
                amount = amount - fees;
            }
        }
        super._update(from, to, amount);
    }

    /// @notice swap the collected fees to eth / add liquidity
    /// after conversion, it sends eth to marketing wallet, add auto liquidity
    /// @param tokenAmount: tokens to be swapped appropriately as per fee structure
    function swapAndLiquify(uint256 tokenAmount) private lockTheSwap {
        if (totalBuyFee + totalSellFee == 0) {
            swapTokensForEth(tokenAmount);
            bool m;
            (m, ) = marketingWallet.call{value: address(this).balance}(
                ""
            );
        } else {
            uint256 marketingTokens = ((buyFee.marketing + sellFee.marketing) *
                tokenAmount) / (totalBuyFee + totalSellFee);
            uint256 liquidityTokens = tokenAmount - marketingTokens;
            uint256 liquidityTokensHalf = liquidityTokens / 2;
            uint256 swapTokens = tokenAmount - liquidityTokensHalf;
            uint256 ethBalanceBeforeSwap = address(this).balance;
            swapTokensForEth(swapTokens);

            uint256 ethBalanceAfterSwap = address(this).balance -
                ethBalanceBeforeSwap;
            uint256 ethForLiquidity = (liquidityTokensHalf *
                ethBalanceAfterSwap) / swapTokens;
            if (ethForLiquidity > 0 && liquidityTokensHalf > 0) {
                addLiquidity(liquidityTokensHalf, ethForLiquidity);
            }
            bool success;
            uint256 marketingEth = address(this).balance;
            if (marketingEth > 0) {
                (success, ) = marketingWallet.call{
                    value: marketingEth
                }("");
            }

            emit FeesSwapped(
                ethForLiquidity,
                liquidityTokensHalf,
                marketingEth
            );
        }
    }

    /// @notice manages tokens conversion to eth
    /// @param tokenAmount: tokens to be converted to eth
    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

        if (allowance(address(this), address(uniswapV2Router)) < tokenAmount) {
            _approve(
                address(this),
                address(uniswapV2Router),
                type(uint256).max
            );
        }

        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    /// @notice manage autoLP (liquidity addition)
    /// @param tokenAmount: tokens to be added to liquidity
    /// @param ethAmount: eth to be added to liquidity
    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // add the liquidity
        uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            owner(), // LP tokens recevier
            block.timestamp
        );
    }

    /// @notice convert all or some percentage of collected tax to eth
    /// @param percentage: percentage of collected tax to swap
    function manualSwap(uint256 percentage) external lockTheSwap {
        if (msg.sender != marketingWallet && msg.sender != owner()) {
            revert OnlyOwnerOrMarketingWallet();
        }
        uint256 tokens = balanceOf(address(this));
        uint256 amount = (tokens * percentage) / 100;
        swapTokensForEth(amount);
        uint256 ethAmount = address(this).balance;
        bool success;
        (success, ) = payable(marketingWallet).call{value: ethAmount}("");
    }

    /// calculate Buy tax based on the txns after initial launch
    function calculateBuyTax() internal view returns (uint256) {
        if (normalMode) {
            return totalBuyFee;
        } else {
            if (txCounter <= 10) {
                return 25;
            } else if (txCounter <= 20) {
                return 20;
            } else if (txCounter <= 25) {
                return 15;
            } else if (txCounter <= 30) {
                return 10;
            } else {
                return totalBuyFee;
            }
        }
    }

    /// calculate sell tax based on the txns after initial launch
    function calculateSellTax() internal view returns (uint256) {
        if (normalMode) {
            return totalSellFee;
        } else {
            if (txCounter <= 10) {
                return 25;
            } else if (txCounter <= 20) {
                return 20;
            } else if (txCounter <= 25) {
                return 15;
            } else if (txCounter <= 30) {
                return 10;
            } else {
                return totalSellFee;
            }
        }
    }

    /// calculate transfer tax based on the txns after initial launch
    function calculateTransferTax() internal view returns (uint256) {
        if (normalMode) {
            return 0;
        } else {
            if (txCounter <= 10) {
                return 15;
            } else if (txCounter <= 30) {
                return 10;
            } else {
                return 0;
            }
        }
    }
}
设置
{
  "compilationTarget": {
    "QuickSync.sol": "QuickSync"
  },
  "evmVersion": "cancun",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}
ABI
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