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// SPDX-FileCopyrightText: 2024 OpenZeppelin, Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.10;

import {ERC20Bridged} from "./ERC20Bridged.sol";
import {PermitExtension} from "./PermitExtension.sol";
import {Versioned} from "../utils/Versioned.sol";

/// @author kovalgek
/// @notice extends ERC20Bridged functionality that allows to use permits and versioning.
contract ERC20BridgedPermit is ERC20Bridged, PermitExtension, Versioned {

    /// @param name_ The name of the token
    /// @param symbol_ The symbol of the token
    /// @param version_ The current major version of the signing domain (aka token version)
    /// @param decimals_ The decimals places of the token
    /// @param bridge_ The bridge address which allows to mint/burn tokens
    constructor(
        string memory name_,
        string memory symbol_,
        string memory version_,
        uint8 decimals_,
        address bridge_
    )
        ERC20Bridged(name_, symbol_, decimals_, bridge_)
        PermitExtension(name_, version_)
    {
    }

    /// @notice Initializes the contract from scratch.
    /// @param name_ The name of the token
    /// @param symbol_ The symbol of the token
    /// @param version_ The version of the token
    function initialize(string memory name_, string memory symbol_, string memory version_) external {
        if (_isMetadataInitialized()) {
            revert ErrorMetadataIsAlreadyInitialized();
        }
        _initializeERC20Metadata(name_, symbol_);
        _initialize_v2(name_, version_);
    }

    /// @notice A function to finalize upgrade to v2 (from v1).
    function finalizeUpgrade_v2(string memory name_, string memory version_) external {
        if (!_isMetadataInitialized()) {
            revert ErrorMetadataIsNotInitialized();
        }
        _initialize_v2(name_, version_);
    }

    function _initialize_v2(string memory name_, string memory version_) internal {
        _initializeContractVersionTo(2);
        _initializeEIP5267Metadata(name_, version_);
    }

    /// @inheritdoc PermitExtension
    function _permitAccepted(address owner_, address spender_, uint256 amount_) internal override {
        _approve(owner_, spender_, amount_);
    }

    error ErrorMetadataIsNotInitialized();
    error ErrorMetadataIsAlreadyInitialized();
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/draft-IERC2612.sol)

pragma solidity ^0.8.0;

import "../token/ERC20/extensions/draft-IERC20Permit.sol";

interface IERC2612 is IERC20Permit {}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 *
 * _Available since v4.1._
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with _data
     */
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// 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 (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol)

pragma solidity ^0.8.0;

import "./ECDSA.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * _Available since v3.4._
 */
abstract contract EIP712 {
    /* solhint-disable var-name-mixedcase */
    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
    uint256 private immutable _CACHED_CHAIN_ID;
    address private immutable _CACHED_THIS;

    bytes32 private immutable _HASHED_NAME;
    bytes32 private immutable _HASHED_VERSION;
    bytes32 private immutable _TYPE_HASH;

    /* solhint-enable var-name-mixedcase */

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));
        bytes32 typeHash = keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );
        _HASHED_NAME = hashedName;
        _HASHED_VERSION = hashedVersion;
        _CACHED_CHAIN_ID = block.chainid;
        _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
        _CACHED_THIS = address(this);
        _TYPE_HASH = typeHash;
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) {
            return _CACHED_DOMAIN_SEPARATOR;
        } else {
            return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
        }
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/SignatureChecker.sol)

pragma solidity ^0.8.0;

import "./ECDSA.sol";
import "../Address.sol";
import "../../interfaces/IERC1271.sol";

/**
 * @dev Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA
 * signatures from externally owned accounts (EOAs) as well as ERC1271 signatures from smart contract wallets like
 * Argent and Gnosis Safe.
 *
 * _Available since v4.1._
 */
library SignatureChecker {
    /**
     * @dev Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the
     * signature is validated against that smart contract using ERC1271, otherwise it's validated using `ECDSA.recover`.
     *
     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
     * change through time. It could return true at block N and false at block N+1 (or the opposite).
     */
    function isValidSignatureNow(
        address signer,
        bytes32 hash,
        bytes memory signature
    ) internal view returns (bool) {
        (address recovered, ECDSA.RecoverError error) = ECDSA.tryRecover(hash, signature);
        if (error == ECDSA.RecoverError.NoError && recovered == signer) {
            return true;
        }

        (bool success, bytes memory result) = signer.staticcall(
            abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, signature)
        );
        return (success && result.length == 32 && abi.decode(result, (bytes4)) == IERC1271.isValidSignature.selector);
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// SPDX-FileCopyrightText: 2024 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.10;

/// @dev A copy of UnstructuredRefStorage.sol library from Lido on Ethereum protocol.
///      https://github.com/lidofinance/lido-dao/blob/master/contracts/0.8.9/lib/UnstructuredRefStorage.sol
library UnstructuredRefStorage {
    function storageMapAddressMapAddressUint256(bytes32 _position) internal pure returns (
        mapping(address => mapping(address => uint256)) storage result
    ) {
        assembly { result.slot := _position }
    }

    function storageMapAddressAddressUint256(bytes32 _position) internal pure returns (
        mapping(address => uint256) storage result
    ) {
        assembly { result.slot := _position }
    }
}

// SPDX-FileCopyrightText: 2024 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.10;

/// @dev A copy of UnstructuredStorage.sol library from Lido on Ethereum protocol.
///      https://github.com/lidofinance/lido-dao/blob/master/contracts/0.8.9/lib/UnstructuredStorage.sol
library UnstructuredStorage {
    function getStorageBool(bytes32 position) internal view returns (bool data) {
        assembly { data := sload(position) }
    }

    function getStorageUint256(bytes32 position) internal view returns (uint256 data) {
        assembly { data := sload(position) }
    }

    function setStorageBool(bytes32 position, bool data) internal {
        assembly { sstore(position, data) }
    }

    function setStorageUint256(bytes32 position, uint256 data) internal {
        assembly { sstore(position, data) }
    }
}

// SPDX-FileCopyrightText: 2024 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.10;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {ERC20Core} from "./ERC20Core.sol";
import {ERC20Metadata} from "./ERC20Metadata.sol";

/// @author psirex, kovalgek
/// @notice Extends the ERC20 functionality that allows the bridge to mint/burn tokens
interface IERC20Bridged is IERC20 {
    /// @notice Returns bridge which can mint and burn tokens on L2
    function bridge() external view returns (address);

    /// @notice Creates `amount_` tokens and assigns them to `account_`, increasing the total supply
    /// @param account_ An address of the account to mint tokens
    /// @param amount_ An amount of tokens to mint
    function bridgeMint(address account_, uint256 amount_) external;

    /// @notice Destroys `amount_` tokens from `account_`, reducing the total supply
    /// @param account_ An address of the account to burn tokens
    /// @param amount_ An amount of tokens to burn
    function bridgeBurn(address account_, uint256 amount_) external;
}

/// @author psirex, kovalgek
/// @notice Extends the ERC20 functionality that allows the bridge to mint/burn tokens
contract ERC20Bridged is IERC20Bridged, ERC20Core, ERC20Metadata {
    /// @inheritdoc IERC20Bridged
    address public immutable bridge;

    /// @param name_ The name of the token
    /// @param symbol_ The symbol of the token
    /// @param decimals_ The decimals places of the token
    /// @param bridge_ The bridge address which allows to mint/burn tokens
    constructor(
        string memory name_,
        string memory symbol_,
        uint8 decimals_,
        address bridge_
    ) ERC20Metadata(name_, symbol_, decimals_) {
        if (bridge_ == address(0)) {
            revert ErrorZeroAddressBridge();
        }
        bridge = bridge_;
    }

    /// @inheritdoc IERC20Bridged
    function bridgeMint(address account_, uint256 amount_) external onlyBridge {
        _mint(account_, amount_);
    }

    /// @inheritdoc IERC20Bridged
    function bridgeBurn(address account_, uint256 amount_) external onlyBridge {
        _burn(account_, amount_);
    }

    /// @notice Sets the name and the symbol of the tokens if they both are empty
    /// @param name_ The name of the token
    /// @param symbol_ The symbol of the token
    function _initializeERC20Metadata(string memory name_, string memory symbol_) internal {
        _setERC20MetadataName(name_);
        _setERC20MetadataSymbol(symbol_);
    }

    /// @dev Validates that sender of the transaction is the bridge
    modifier onlyBridge() {
        if (msg.sender != bridge) {
            revert ErrorNotBridge();
        }
        _;
    }

    error ErrorZeroAddressBridge();
    error ErrorNotBridge();
}

// SPDX-FileCopyrightText: 2022 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.10;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/// @author psirex
/// @notice Contains the required logic of the ERC20 standard as defined in the EIP. Additionally
///     provides methods for direct allowance increasing/decreasing.
contract ERC20Core is IERC20 {
    /// @inheritdoc IERC20
    uint256 public totalSupply;

    /// @inheritdoc IERC20
    mapping(address => uint256) public balanceOf;

    /// @inheritdoc IERC20
    mapping(address => mapping(address => uint256)) public allowance;

    /// @inheritdoc IERC20
    function approve(address spender_, uint256 amount_)
        external
        returns (bool)
    {
        _approve(msg.sender, spender_, amount_);
        return true;
    }

    /// @inheritdoc IERC20
    function transfer(address to_, uint256 amount_) external returns (bool) {
        _transfer(msg.sender, to_, amount_);
        return true;
    }

    /// @inheritdoc IERC20
    function transferFrom(
        address from_,
        address to_,
        uint256 amount_
    ) external returns (bool) {
        _spendAllowance(from_, msg.sender, amount_);
        _transfer(from_, to_, amount_);
        return true;
    }

    /// @dev Moves amount_ of tokens from sender_ to recipient_
    /// @param from_ An address of the sender of the tokens
    /// @param to_  An address of the recipient of the tokens
    /// @param amount_ An amount of tokens to transfer
    function _transfer(
        address from_,
        address to_,
        uint256 amount_
    ) internal onlyNonZeroAccount(from_) onlyNonZeroAccount(to_) {
        _decreaseBalance(from_, amount_);
        balanceOf[to_] += amount_;
        emit Transfer(from_, to_, amount_);
    }

    /// @dev Updates owner_'s allowance for spender_ based on spent amount_. Does not update
    ///     the allowance amount in case of infinite allowance
    /// @param owner_ An address of the account to spend allowance
    /// @param spender_  An address of the spender of the tokens
    /// @param amount_ An amount of allowance spend
    function _spendAllowance(
        address owner_,
        address spender_,
        uint256 amount_
    ) internal {
        uint256 currentAllowance = allowance[owner_][spender_];
        if (currentAllowance == type(uint256).max) {
            return;
        }
        if (amount_ > currentAllowance) {
            revert ErrorNotEnoughAllowance();
        }
        unchecked {
            _approve(owner_, spender_, currentAllowance - amount_);
        }
    }

    /// @dev Sets amount_ as the allowance of spender_ over the owner_'s tokens
    /// @param owner_ An address of the account to set allowance
    /// @param spender_  An address of the tokens spender
    /// @param amount_ An amount of tokens to allow to spend
    function _approve(
        address owner_,
        address spender_,
        uint256 amount_
    ) internal virtual onlyNonZeroAccount(owner_) onlyNonZeroAccount(spender_) {
        allowance[owner_][spender_] = amount_;
        emit Approval(owner_, spender_, amount_);
    }

    /// @dev Creates amount_ tokens and assigns them to account_, increasing the total supply
    /// @param account_ An address of the account to mint tokens
    /// @param amount_ An amount of tokens to mint
    function _mint(address account_, uint256 amount_)
        internal
        onlyNonZeroAccount(account_)
    {
        totalSupply += amount_;
        balanceOf[account_] += amount_;
        emit Transfer(address(0), account_, amount_);
    }

    /// @dev Destroys amount_ tokens from account_, reducing the total supply.
    /// @param account_ An address of the account to mint tokens
    /// @param amount_ An amount of tokens to mint
    function _burn(address account_, uint256 amount_)
        internal
        onlyNonZeroAccount(account_)
    {
        _decreaseBalance(account_, amount_);
        totalSupply -= amount_;
        emit Transfer(account_, address(0), amount_);
    }

    /// @dev Decreases the balance of the account_
    /// @param account_ An address of the account to decrease balance
    /// @param amount_ An amount of balance decrease
    function _decreaseBalance(address account_, uint256 amount_) internal {
        uint256 balance = balanceOf[account_];

        if (amount_ > balance) {
            revert ErrorNotEnoughBalance();
        }
        unchecked {
            balanceOf[account_] = balance - amount_;
        }
    }

    /// @dev validates that account_ is not zero address
    modifier onlyNonZeroAccount(address account_) {
        if (account_ == address(0)) {
            revert ErrorAccountIsZeroAddress();
        }
        _;
    }

    error ErrorNotEnoughBalance();
    error ErrorNotEnoughAllowance();
    error ErrorAccountIsZeroAddress();
}

// SPDX-FileCopyrightText: 2022 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.10;

/// @author psirex
/// @notice Interface for the optional metadata functions from the ERC20 standard.
interface IERC20Metadata {
    /// @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);
}

/// @author psirex
/// @notice Contains the optional metadata functions from the ERC20 standard
/// @dev Uses the UnstructuredStorage pattern to store dynamic name and symbol data. Might be used
///     with the upgradable proxies
contract ERC20Metadata is IERC20Metadata {
    /// @dev Stores the dynamic metadata of the ERC20 token. Allows safely use of this
    ///     contract with upgradable proxies
    struct DynamicMetadata {
        string name;
        string symbol;
    }

    /// @dev Location of the slot with DynamicMetdata
    ///      The slot's index string has a misspelling, but the contract storage will be broken without it.
    bytes32 private constant DYNAMIC_METADATA_SLOT =
        keccak256("ERC20Metdata.dynamicMetadata");

    /// @inheritdoc IERC20Metadata
    uint8 public immutable decimals;

    /// @param name_ Name of the token
    /// @param symbol_ Symbol of the token
    /// @param decimals_ Decimals places of the token
    constructor(
        string memory name_,
        string memory symbol_,
        uint8 decimals_
    ) {
        if (decimals_ == 0) {
            revert ErrorZeroDecimals();
        }
        decimals = decimals_;
        _setERC20MetadataName(name_);
        _setERC20MetadataSymbol(symbol_);
    }

    /// @inheritdoc IERC20Metadata
    function name() public view returns (string memory) {
        return _loadDynamicMetadata().name;
    }

    /// @inheritdoc IERC20Metadata
    function symbol() public view returns (string memory) {
        return _loadDynamicMetadata().symbol;
    }

    /// @dev Sets the name of the token.
    function _setERC20MetadataName(string memory name_) internal {
        if (bytes(name_).length == 0) {
            revert ErrorNameIsEmpty();
        }
        _loadDynamicMetadata().name = name_;
    }

    /// @dev Sets the symbol of the token.
    function _setERC20MetadataSymbol(string memory symbol_) internal {
        if (bytes(symbol_).length == 0) {
            revert ErrorSymbolIsEmpty();
        }
        _loadDynamicMetadata().symbol = symbol_;
    }

    function _isMetadataInitialized() internal view returns (bool) {
        return bytes(name()).length != 0 && bytes(symbol()).length != 0;
    }

    /// @dev Returns the reference to the slot with DynamicMetadata struct
    function _loadDynamicMetadata()
        private
        pure
        returns (DynamicMetadata storage r)
    {
        bytes32 slot = DYNAMIC_METADATA_SLOT;
        assembly {
            r.slot := slot
        }
    }

    error ErrorZeroDecimals();
    error ErrorNameIsEmpty();
    error ErrorSymbolIsEmpty();
}

// SPDX-FileCopyrightText: 2024 OpenZeppelin, Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.10;

import {IERC2612} from "@openzeppelin/contracts/interfaces/draft-IERC2612.sol";
import {EIP712} from "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol";
import {SignatureChecker} from "@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol";
import {UnstructuredRefStorage} from "../lib//UnstructuredRefStorage.sol";

/// @author arwer13, kovalgek
abstract contract PermitExtension is IERC2612, EIP712 {
    using UnstructuredRefStorage for bytes32;

    /// @dev Stores the dynamic metadata of the PermitExtension. Allows safely use of this
    ///     contract with upgradable proxies
    struct EIP5267Metadata {
        string name;
        string version;
    }

    /// @dev user nonce slot position.
    bytes32 internal constant NONCE_BY_ADDRESS_POSITION = keccak256("PermitExtension.NONCE_BY_ADDRESS_POSITION");

    /// @dev Typehash constant for ERC-2612 (Permit)
    /// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)")
    bytes32 internal constant PERMIT_TYPEHASH =
        0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;

    /// @dev Location of the slot with EIP5267Metadata
    bytes32 private constant EIP5267_METADATA_SLOT = keccak256("PermitExtension.eip5267MetadataSlot");

    /// @param name_ The name of the token
    /// @param version_ The current major version of the signing domain (aka token version)
    constructor(string memory name_, string memory version_) EIP712(name_, version_) {
        _initializeEIP5267Metadata(name_, version_);
    }

    /// @notice Sets `value_` as the allowance of `spender_` over `owner_`'s tokens, given `owner_`'s signed approval.
    /// @param owner_  Token owner's address (Authorizer). Cannot be the zero address.
    /// @param spender_  An address of the tokens spender. Cannot be the zero address.
    /// @param value_ An amount of tokens to allow to spend.
    /// @param deadline_ The time at which the signature expires (unix time). Must be a timestamp in the future.
    /// @param v_, r_, s_ must be a valid `secp256k1` signature from `owner`
    ///                   over the EIP712-formatted function arguments.
    ///                   The signature must use ``owner``'s current nonce (see {nonces}).
    function permit(
        address owner_,
        address spender_,
        uint256 value_,
        uint256 deadline_,
        uint8 v_,
        bytes32 r_,
        bytes32 s_
    ) external {
        _permit(owner_, spender_, value_, deadline_, abi.encodePacked(r_, s_, v_));
    }

    /// @notice Sets `value_` as the allowance of `spender_` over `owner_`'s tokens, given `owner_`'s signed approval.
    /// @param owner_  Token owner's address (Authorizer). Cannot be the zero address.
    /// @param spender_  An address of the tokens spender. Cannot be the zero address.
    /// @param value_ An amount of tokens to allow to spend.
    /// @param deadline_ The time at which the signature expires (unix time). Must be a timestamp in the future.
    /// @param signature_ Unstructured bytes signature signed by an EOA wallet or a contract wallet.
    function permit(
        address owner_,
        address spender_,
        uint256 value_,
        uint256 deadline_,
        bytes calldata signature_
    ) external {
        _permit(owner_, spender_, value_, deadline_, signature_);
    }

    function _permit(
        address owner_,
        address spender_,
        uint256 value_,
        uint256 deadline_,
        bytes memory signature_
    ) internal {
        if (block.timestamp > deadline_) {
            revert ErrorDeadlineExpired();
        }

        bytes32 hash = _hashTypedDataV4(
            keccak256(
                abi.encode(PERMIT_TYPEHASH, owner_, spender_, value_, _useNonce(owner_), deadline_)
            )
        );

        if (!SignatureChecker.isValidSignatureNow(owner_, hash, signature_)) {
            revert ErrorInvalidSignature();
        }

        _permitAccepted(owner_, spender_, value_);
    }

    /// @dev Returns the current nonce for `owner`. This value must be
    /// included whenever a signature is generated for {permit}.
    ///
    /// Every successful call to {permit} increases ``owner``'s nonce by one. This
    /// prevents a signature from being used multiple times.
    ///
    function nonces(address owner) external view returns (uint256) {
        return _getNonceByAddress()[owner];
    }

    /// @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32) {
        return _domainSeparatorV4();
    }

    /// @dev EIP-5267. Returns the fields and values that describe the domain separator
    /// used by this contract for EIP-712 signature.
    function eip712Domain()
        external
        view
        virtual
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        )
    {
        return (
            hex"0f", // 01111
            _loadEIP5267Metadata().name,
            _loadEIP5267Metadata().version,
            block.chainid,
            address(this),
            bytes32(0),
            new uint256[](0)
        );
    }

    /// @notice Sets the name and the version of the tokens if they both are empty
    /// @param name_ The name of the token
    /// @param version_ The version of the token
    function _initializeEIP5267Metadata(string memory name_, string memory version_) internal {
        _setEIP5267MetadataName(name_);
        _setEIP5267MetadataVersion(version_);
    }

    /// @dev "Consume a nonce": return the current value and increment.
    function _useNonce(address _owner) internal returns (uint256 current) {
        current = _getNonceByAddress()[_owner];
        _getNonceByAddress()[_owner] = current + 1;
    }

    /// @notice Nonces for ERC-2612 (Permit)
    function _getNonceByAddress() internal pure returns (mapping(address => uint256) storage) {
        return NONCE_BY_ADDRESS_POSITION.storageMapAddressAddressUint256();
    }

    /// @dev Override this function in the inherited contract to invoke the approve() function of ERC20.
    function _permitAccepted(address owner_, address spender_, uint256 amount_) internal virtual;

    /// @dev Sets the name of the token. Might be called only when the name is empty
    function _setEIP5267MetadataName(string memory name_) internal {
        _loadEIP5267Metadata().name = name_;
    }

    /// @dev Sets the version of the token. Might be called only when the version is empty
    function _setEIP5267MetadataVersion(string memory version_) internal {
        _loadEIP5267Metadata().version = version_;
    }

    /// @dev Returns the reference to the slot with EIP5267Metadata struct
    function _loadEIP5267Metadata() private pure returns (EIP5267Metadata storage r) {
        bytes32 slot = EIP5267_METADATA_SLOT;
        assembly {
            r.slot := slot
        }
    }

    error ErrorInvalidSignature();
    error ErrorDeadlineExpired();
}

// SPDX-FileCopyrightText: 2022 Lido <[email protected]>
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.10;

import {UnstructuredStorage} from "../lib/UnstructuredStorage.sol";

/// @dev A copy of Versioned.sol contract from Lido on Ethereum protocol
///      https://github.com/lidofinance/lido-dao/blob/master/contracts/0.8.9/utils/Versioned.sol
contract Versioned {
    using UnstructuredStorage for bytes32;

    event ContractVersionSet(uint256 version);

    error NonZeroContractVersionOnInit();
    error InvalidContractVersionIncrement();
    error UnexpectedContractVersion(uint256 expected, uint256 received);

    /// @dev Storage slot: uint256 version
    /// Version of the initialized contract storage.
    /// The version stored in CONTRACT_VERSION_POSITION equals to:
    /// - 0 right after the deployment, before an initializer is invoked (and only at that moment);
    /// - N after calling initialize(), where N is the initially deployed contract version;
    /// - N after upgrading contract by calling finalizeUpgrade_vN().
    bytes32 internal constant CONTRACT_VERSION_POSITION = keccak256("lido.Versioned.contractVersion");

    uint256 internal constant PETRIFIED_VERSION_MARK = type(uint256).max;

    constructor() {
        // lock version in the implementation's storage to prevent initialization
        CONTRACT_VERSION_POSITION.setStorageUint256(PETRIFIED_VERSION_MARK);
    }

    /// @notice Returns the current contract version.
    function getContractVersion() public view returns (uint256) {
        return CONTRACT_VERSION_POSITION.getStorageUint256();
    }

    function _checkContractVersion(uint256 version) internal view {
        uint256 expectedVersion = getContractVersion();
        if (version != expectedVersion) {
            revert UnexpectedContractVersion(expectedVersion, version);
        }
    }

    /// @dev Sets the contract version to N. Should be called from the initialize() function.
    function _initializeContractVersionTo(uint256 version) internal {
        if (getContractVersion() != 0) revert NonZeroContractVersionOnInit();
        _setContractVersion(version);
    }

    /// @dev Updates the contract version. Should be called from a finalizeUpgrade_vN() function.
    function _updateContractVersion(uint256 newVersion) internal {
        if (newVersion != getContractVersion() + 1) revert InvalidContractVersionIncrement();
        _setContractVersion(newVersion);
    }

    function _setContractVersion(uint256 version) private {
        CONTRACT_VERSION_POSITION.setStorageUint256(version);
        emit ContractVersionSet(version);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 100000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"string","name":"version_","type":"string"},{"internalType":"uint8","name":"decimals_","type":"uint8"},{"internalType":"address","name":"bridge_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ErrorAccountIsZeroAddress","type":"error"},{"inputs":[],"name":"ErrorDeadlineExpired","type":"error"},{"inputs":[],"name":"ErrorInvalidSignature","type":"error"},{"inputs":[],"name":"ErrorMetadataIsAlreadyInitialized","type":"error"},{"inputs":[],"name":"ErrorMetadataIsNotInitialized","type":"error"},{"inputs":[],"name":"ErrorNameIsEmpty","type":"error"},{"inputs":[],"name":"ErrorNotBridge","type":"error"},{"inputs":[],"name":"ErrorNotEnoughAllowance","type":"error"},{"inputs":[],"name":"ErrorNotEnoughBalance","type":"error"},{"inputs":[],"name":"ErrorSymbolIsEmpty","type":"error"},{"inputs":[],"name":"ErrorZeroAddressBridge","type":"error"},{"inputs":[],"name":"ErrorZeroDecimals","type":"error"},{"inputs":[],"name":"InvalidContractVersionIncrement","type":"error"},{"inputs":[],"name":"NonZeroContractVersionOnInit","type":"error"},{"inputs":[{"internalType":"uint256","name":"expected","type":"uint256"},{"internalType":"uint256","name":"received","type":"uint256"}],"name":"UnexpectedContractVersion","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":false,"internalType":"uint256","name":"version","type":"uint256"}],"name":"ContractVersionSet","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":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender_","type":"address"},{"internalType":"uint256","name":"amount_","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"bridge","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account_","type":"address"},{"internalType":"uint256","name":"amount_","type":"uint256"}],"name":"bridgeBurn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account_","type":"address"},{"internalType":"uint256","name":"amount_","type":"uint256"}],"name":"bridgeMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"eip712Domain","outputs":[{"internalType":"bytes1","name":"fields","type":"bytes1"},{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"version","type":"string"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"address","name":"verifyingContract","type":"address"},{"internalType":"bytes32","name":"salt","type":"bytes32"},{"internalType":"uint256[]","name":"extensions","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"version_","type":"string"}],"name":"finalizeUpgrade_v2","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getContractVersion","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"string","name":"version_","type":"string"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"},{"internalType":"address","name":"spender_","type":"address"},{"internalType":"uint256","name":"value_","type":"uint256"},{"internalType":"uint256","name":"deadline_","type":"uint256"},{"internalType":"bytes","name":"signature_","type":"bytes"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"},{"internalType":"address","name":"spender_","type":"address"},{"internalType":"uint256","name":"value_","type":"uint256"},{"internalType":"uint256","name":"deadline_","type":"uint256"},{"internalType":"uint8","name":"v_","type":"uint8"},{"internalType":"bytes32","name":"r_","type":"bytes32"},{"internalType":"bytes32","name":"s_","type":"bytes32"}],"name":"permit","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":"amount_","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":"amount_","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

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-----Decoded View---------------
Arg [0] : name_ (string): Wrapped liquid staked Ether 2.0
Arg [1] : symbol_ (string): wstETH
Arg [2] : version_ (string): 2
Arg [3] : decimals_ (uint8): 18
Arg [4] : bridge_ (address): 0x1A513e9B6434a12C7bB5B9AF3B21963308DEE372

-----Encoded View---------------
11 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [4] : 0000000000000000000000001a513e9b6434a12c7bb5b9af3b21963308dee372
Arg [5] : 000000000000000000000000000000000000000000000000000000000000001f
Arg [6] : 57726170706564206c6971756964207374616b656420457468657220322e3000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [8] : 7773744554480000000000000000000000000000000000000000000000000000
Arg [9] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [10] : 3200000000000000000000000000000000000000000000000000000000000000