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Contract

0x5ac4182A1dd41AeEf465E40B82fd326BF66AB82C

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ContractCreator:

GENESIS at txn GENESIS_5ac4182A1dd41AeEf465E40B82fd326BF66AB82C

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GENESIS_5ac4182A1dd41AeEf465E40B82fd326BF66AB82C0x6080604002023-03-24 10:19:23424 days ago1679653163GENESISIN
 Create: PolygonZkEVMBridge
0 ETH00

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Contract Source Code Verified (Exact Match)

Contract Name:
PolygonZkEVMBridge

Compiler Version
v0.8.17+commit.8df45f5f

Optimization Enabled:
Yes with 999999 runs

Other Settings:
default evmVersion, GNU GPLv3 license

Contract Source Code (Solidity)

/**
 *Submitted for verification at zkevm.polygonscan.com on 2023-03-28
*/

// SPDX-License-Identifier: AGPL-3.0
// File: contracts/lib/GlobalExitRootLib.sol



pragma solidity 0.8.17;

/**
 * @dev A library that provides the necessary calculations to calculate the global exit root
 */
library GlobalExitRootLib {
    function calculateGlobalExitRoot(
        bytes32 mainnetExitRoot,
        bytes32 rollupExitRoot
    ) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked(mainnetExitRoot, rollupExitRoot));
    }
}

// File: contracts/lib/EmergencyManager.sol



pragma solidity 0.8.17;

/**
 * @dev Contract helper responsible to manage the emergency state
 */
contract EmergencyManager {
    /**
     * @dev Thrown when emergency state is active, and the function requires otherwise
     */
    error OnlyNotEmergencyState();

    /**
     * @dev Thrown when emergency state is not active, and the function requires otherwise
     */
    error OnlyEmergencyState();

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     */
    uint256[10] private _gap;

    // Indicates whether the emergency state is active or not
    bool public isEmergencyState;

    /**
     * @dev Emitted when emergency state is activated
     */
    event EmergencyStateActivated();

    /**
     * @dev Emitted when emergency state is deactivated
     */
    event EmergencyStateDeactivated();

    /**
     * @notice Only allows a function to be callable if emergency state is unactive
     */
    modifier ifNotEmergencyState() {
        if (isEmergencyState) {
            revert OnlyNotEmergencyState();
        }
        _;
    }

    /**
     * @notice Only allows a function to be callable if emergency state is active
     */
    modifier ifEmergencyState() {
        if (!isEmergencyState) {
            revert OnlyEmergencyState();
        }
        _;
    }

    /**
     * @notice Activate emergency state
     */
    function _activateEmergencyState() internal virtual ifNotEmergencyState {
        isEmergencyState = true;
        emit EmergencyStateActivated();
    }

    /**
     * @notice Deactivate emergency state
     */
    function _deactivateEmergencyState() internal virtual ifEmergencyState {
        isEmergencyState = false;
        emit EmergencyStateDeactivated();
    }
}

// File: contracts/interfaces/IPolygonZkEVMBridge.sol



pragma solidity 0.8.17;

interface IPolygonZkEVMBridge {
    /**
     * @dev Thrown when sender is not the PolygonZkEVM address
     */
    error OnlyPolygonZkEVM();

    /**
     * @dev Thrown when the destination network is invalid
     */
    error DestinationNetworkInvalid();

    /**
     * @dev Thrown when the amount does not match msg.value
     */
    error AmountDoesNotMatchMsgValue();

    /**
     * @dev Thrown when user is bridging tokens and is also sending a value
     */
    error MsgValueNotZero();

    /**
     * @dev Thrown when the Ether transfer on claimAsset fails
     */
    error EtherTransferFailed();

    /**
     * @dev Thrown when the message transaction on claimMessage fails
     */
    error MessageFailed();

    /**
     * @dev Thrown when the global exit root does not exist
     */
    error GlobalExitRootInvalid();

    /**
     * @dev Thrown when the smt proof does not match
     */
    error InvalidSmtProof();

    /**
     * @dev Thrown when an index is already claimed
     */
    error AlreadyClaimed();

    /**
     * @dev Thrown when the owner of permit does not match the sender
     */
    error NotValidOwner();

    /**
     * @dev Thrown when the spender of the permit does not match this contract address
     */
    error NotValidSpender();

    /**
     * @dev Thrown when the amount of the permit does not match
     */
    error NotValidAmount();

    /**
     * @dev Thrown when the permit data contains an invalid signature
     */
    error NotValidSignature();

    function bridgeAsset(
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        address token,
        bool forceUpdateGlobalExitRoot,
        bytes calldata permitData
    ) external payable;

    function bridgeMessage(
        uint32 destinationNetwork,
        address destinationAddress,
        bool forceUpdateGlobalExitRoot,
        bytes calldata metadata
    ) external payable;

    function claimAsset(
        bytes32[32] calldata smtProof,
        uint32 index,
        bytes32 mainnetExitRoot,
        bytes32 rollupExitRoot,
        uint32 originNetwork,
        address originTokenAddress,
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        bytes calldata metadata
    ) external;

    function claimMessage(
        bytes32[32] calldata smtProof,
        uint32 index,
        bytes32 mainnetExitRoot,
        bytes32 rollupExitRoot,
        uint32 originNetwork,
        address originAddress,
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        bytes calldata metadata
    ) external;

    function updateGlobalExitRoot() external;

    function activateEmergencyState() external;

    function deactivateEmergencyState() external;
}

// File: contracts/interfaces/IBridgeMessageReceiver.sol



pragma solidity 0.8.17;

/**
 * @dev Define interface for PolygonZkEVM Bridge message receiver
 */
interface IBridgeMessageReceiver {
    function onMessageReceived(
        address originAddress,
        uint32 originNetwork,
        bytes memory data
    ) external payable;
}

// File: contracts/interfaces/IBasePolygonZkEVMGlobalExitRoot.sol



pragma solidity 0.8.17;

interface IBasePolygonZkEVMGlobalExitRoot {
    /**
     * @dev Thrown when the caller is not the allowed contracts
     */
    error OnlyAllowedContracts();

    function updateExitRoot(bytes32 newRollupExitRoot) external;

    function globalExitRootMap(
        bytes32 globalExitRootNum
    ) external returns (uint256);
}

// File: @openzeppelin/contracts/utils/Context.sol


// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol


// 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);
}

// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;


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

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

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

// File: @openzeppelin/contracts/token/ERC20/ERC20.sol


// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;




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

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

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

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

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

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

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

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

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

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

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

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

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

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

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

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

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

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

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

        _afterTokenTransfer(address(0), account, amount);
    }

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

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

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

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

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

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

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

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

// File: contracts/lib/TokenWrapped.sol


// Implementation of permit based on https://github.com/WETH10/WETH10/blob/main/contracts/WETH10.sol
pragma solidity 0.8.17;


contract TokenWrapped is ERC20 {
    // Domain typehash
    bytes32 public constant DOMAIN_TYPEHASH =
        keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );
    // Permit typehash
    bytes32 public constant PERMIT_TYPEHASH =
        keccak256(
            "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
        );

    // Version
    string public constant VERSION = "1";

    // Chain id on deployment
    uint256 public immutable deploymentChainId;

    // Domain separator calculated on deployment
    bytes32 private immutable _DEPLOYMENT_DOMAIN_SEPARATOR;

    // PolygonZkEVM Bridge address
    address public immutable bridgeAddress;

    // Decimals
    uint8 private immutable _decimals;

    // Permit nonces
    mapping(address => uint256) public nonces;

    modifier onlyBridge() {
        require(
            msg.sender == bridgeAddress,
            "TokenWrapped::onlyBridge: Not PolygonZkEVMBridge"
        );
        _;
    }

    constructor(
        string memory name,
        string memory symbol,
        uint8 __decimals
    ) ERC20(name, symbol) {
        bridgeAddress = msg.sender;
        _decimals = __decimals;
        deploymentChainId = block.chainid;
        _DEPLOYMENT_DOMAIN_SEPARATOR = _calculateDomainSeparator(block.chainid);
    }

    function mint(address to, uint256 value) external onlyBridge {
        _mint(to, value);
    }

    // Notice that is not require to approve wrapped tokens to use the bridge
    function burn(address account, uint256 value) external onlyBridge {
        _burn(account, value);
    }

    function decimals() public view virtual override returns (uint8) {
        return _decimals;
    }

    // Permit relative functions
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external {
        require(
            block.timestamp <= deadline,
            "TokenWrapped::permit: Expired permit"
        );

        bytes32 hashStruct = keccak256(
            abi.encode(
                PERMIT_TYPEHASH,
                owner,
                spender,
                value,
                nonces[owner]++,
                deadline
            )
        );

        bytes32 digest = keccak256(
            abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR(), hashStruct)
        );

        address signer = ecrecover(digest, v, r, s);
        require(
            signer != address(0) && signer == owner,
            "TokenWrapped::permit: Invalid signature"
        );

        _approve(owner, spender, value);
    }

    /**
     * @notice Calculate domain separator, given a chainID.
     * @param chainId Current chainID
     */
    function _calculateDomainSeparator(
        uint256 chainId
    ) private view returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    DOMAIN_TYPEHASH,
                    keccak256(bytes(name())),
                    keccak256(bytes(VERSION)),
                    chainId,
                    address(this)
                )
            );
    }

    /// @dev Return the DOMAIN_SEPARATOR.
    function DOMAIN_SEPARATOR() public view returns (bytes32) {
        return
            block.chainid == deploymentChainId
                ? _DEPLOYMENT_DOMAIN_SEPARATOR
                : _calculateDomainSeparator(block.chainid);
    }
}

// File: @openzeppelin/contracts-upgradeable/token/ERC20/extensions/draft-IERC20PermitUpgradeable.sol


// 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 IERC20PermitUpgradeable {
    /**
     * @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);
}

// File: @openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol


// 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 IERC20Upgradeable {
    /**
     * @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);
}

// File: @openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;


/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20MetadataUpgradeable is IERC20Upgradeable {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

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

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

// File: @openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol


// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or 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 {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// File: @openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol


// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;




/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20Upgradeable {
    using AddressUpgradeable for address;

    function safeTransfer(
        IERC20Upgradeable token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20Upgradeable token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    function safePermit(
        IERC20PermitUpgradeable token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20Upgradeable token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File: @openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol


// OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;


/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// File: @openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol


// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;


/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuardUpgradeable is Initializable {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// File: contracts/lib/DepositContract.sol


pragma solidity 0.8.17;


/**
 * This contract will be used as a helper for all the sparse merkle tree related functions
 * Based on the implementation of the deposit eth2.0 contract https://github.com/ethereum/consensus-specs/blob/dev/solidity_deposit_contract/deposit_contract.sol
 */
contract DepositContract is ReentrancyGuardUpgradeable {
    /**
     * @dev Thrown when the merkle tree is full
     */
    error MerkleTreeFull();

    // Merkle tree levels
    uint256 internal constant _DEPOSIT_CONTRACT_TREE_DEPTH = 32;

    // This ensures `depositCount` will fit into 32-bits
    uint256 internal constant _MAX_DEPOSIT_COUNT =
        2 ** _DEPOSIT_CONTRACT_TREE_DEPTH - 1;

    // Branch array which contains the necessary sibilings to compute the next root when a new
    // leaf is inserted
    bytes32[_DEPOSIT_CONTRACT_TREE_DEPTH] internal _branch;

    // Counter of current deposits
    uint256 public depositCount;

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     */
    uint256[10] private _gap;

    /**
     * @notice Computes and returns the merkle root
     */
    function getDepositRoot() public view returns (bytes32) {
        bytes32 node;
        uint256 size = depositCount;
        bytes32 currentZeroHashHeight = 0;

        for (
            uint256 height = 0;
            height < _DEPOSIT_CONTRACT_TREE_DEPTH;
            height++
        ) {
            if (((size >> height) & 1) == 1)
                node = keccak256(abi.encodePacked(_branch[height], node));
            else
                node = keccak256(abi.encodePacked(node, currentZeroHashHeight));

            currentZeroHashHeight = keccak256(
                abi.encodePacked(currentZeroHashHeight, currentZeroHashHeight)
            );
        }
        return node;
    }

    /**
     * @notice Add a new leaf to the merkle tree
     * @param leafHash Leaf hash
     */
    function _deposit(bytes32 leafHash) internal {
        bytes32 node = leafHash;

        // Avoid overflowing the Merkle tree (and prevent edge case in computing `_branch`)
        if (depositCount >= _MAX_DEPOSIT_COUNT) {
            revert MerkleTreeFull();
        }

        // Add deposit data root to Merkle tree (update a single `_branch` node)
        uint256 size = ++depositCount;
        for (
            uint256 height = 0;
            height < _DEPOSIT_CONTRACT_TREE_DEPTH;
            height++
        ) {
            if (((size >> height) & 1) == 1) {
                _branch[height] = node;
                return;
            }
            node = keccak256(abi.encodePacked(_branch[height], node));
        }
        // As the loop should always end prematurely with the `return` statement,
        // this code should be unreachable. We assert `false` just to be safe.
        assert(false);
    }

    /**
     * @notice Verify merkle proof
     * @param leafHash Leaf hash
     * @param smtProof Smt proof
     * @param index Index of the leaf
     * @param root Merkle root
     */
    function verifyMerkleProof(
        bytes32 leafHash,
        bytes32[_DEPOSIT_CONTRACT_TREE_DEPTH] calldata smtProof,
        uint32 index,
        bytes32 root
    ) public pure returns (bool) {
        bytes32 node = leafHash;

        // Check merkle proof
        for (
            uint256 height = 0;
            height < _DEPOSIT_CONTRACT_TREE_DEPTH;
            height++
        ) {
            if (((index >> height) & 1) == 1)
                node = keccak256(abi.encodePacked(smtProof[height], node));
            else node = keccak256(abi.encodePacked(node, smtProof[height]));
        }

        return node == root;
    }

    /**
     * @notice Given the leaf data returns the leaf value
     * @param leafType Leaf type -->  [0] transfer Ether / ERC20 tokens, [1] message
     * @param originNetwork Origin Network
     * @param originAddress [0] Origin token address, 0 address is reserved for ether, [1] msg.sender of the message
     * @param destinationNetwork Destination network
     * @param destinationAddress Destination address
     * @param amount [0] Amount of tokens/ether, [1] Amount of ether
     * @param metadataHash Hash of the metadata
     */
    function getLeafValue(
        uint8 leafType,
        uint32 originNetwork,
        address originAddress,
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        bytes32 metadataHash
    ) public pure returns (bytes32) {
        return
            keccak256(
                abi.encodePacked(
                    leafType,
                    originNetwork,
                    originAddress,
                    destinationNetwork,
                    destinationAddress,
                    amount,
                    metadataHash
                )
            );
    }
}

// File: contracts/PolygonZkEVMBridge.sol



pragma solidity 0.8.17;










/**
 * PolygonZkEVMBridge that will be deployed on both networks Ethereum and Polygon zkEVM
 * Contract responsible to manage the token interactions with other networks
 */
contract PolygonZkEVMBridge is
    DepositContract,
    EmergencyManager,
    IPolygonZkEVMBridge
{
    using SafeERC20Upgradeable for IERC20Upgradeable;

    // Wrapped Token information struct
    struct TokenInformation {
        uint32 originNetwork;
        address originTokenAddress;
    }

    // bytes4(keccak256(bytes("permit(address,address,uint256,uint256,uint8,bytes32,bytes32)")));
    bytes4 private constant _PERMIT_SIGNATURE = 0xd505accf;

    // bytes4(keccak256(bytes("permit(address,address,uint256,uint256,bool,uint8,bytes32,bytes32)")));
    bytes4 private constant _PERMIT_SIGNATURE_DAI = 0x8fcbaf0c;

    // Mainnet identifier
    uint32 private constant _MAINNET_NETWORK_ID = 0;

    // Number of networks supported by the bridge
    uint32 private constant _CURRENT_SUPPORTED_NETWORKS = 2;

    // Leaf type asset
    uint8 private constant _LEAF_TYPE_ASSET = 0;

    // Leaf type message
    uint8 private constant _LEAF_TYPE_MESSAGE = 1;

    // Network identifier
    uint32 public networkID;

    // Global Exit Root address
    IBasePolygonZkEVMGlobalExitRoot public globalExitRootManager;

    // Last updated deposit count to the global exit root manager
    uint32 public lastUpdatedDepositCount;

    // Leaf index --> claimed bit map
    mapping(uint256 => uint256) public claimedBitMap;

    // keccak256(OriginNetwork || tokenAddress) --> Wrapped token address
    mapping(bytes32 => address) public tokenInfoToWrappedToken;

    // Wrapped token Address --> Origin token information
    mapping(address => TokenInformation) public wrappedTokenToTokenInfo;

    // PolygonZkEVM address
    address public polygonZkEVMaddress;

    /**
     * @param _networkID networkID
     * @param _globalExitRootManager global exit root manager address
     * @param _polygonZkEVMaddress polygonZkEVM address
     * @notice The value of `_polygonZkEVMaddress` on the L2 deployment of the contract will be address(0), so
     * emergency state is not possible for the L2 deployment of the bridge, intentionally
     */
    function initialize(
        uint32 _networkID,
        IBasePolygonZkEVMGlobalExitRoot _globalExitRootManager,
        address _polygonZkEVMaddress
    ) external virtual initializer {
        networkID = _networkID;
        globalExitRootManager = _globalExitRootManager;
        polygonZkEVMaddress = _polygonZkEVMaddress;

        // Initialize OZ contracts
        __ReentrancyGuard_init();
    }

    modifier onlyPolygonZkEVM() {
        if (polygonZkEVMaddress != msg.sender) {
            revert OnlyPolygonZkEVM();
        }
        _;
    }

    /**
     * @dev Emitted when bridge assets or messages to another network
     */
    event BridgeEvent(
        uint8 leafType,
        uint32 originNetwork,
        address originAddress,
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        bytes metadata,
        uint32 depositCount
    );

    /**
     * @dev Emitted when a claim is done from another network
     */
    event ClaimEvent(
        uint32 index,
        uint32 originNetwork,
        address originAddress,
        address destinationAddress,
        uint256 amount
    );

    /**
     * @dev Emitted when a new wrapped token is created
     */
    event NewWrappedToken(
        uint32 originNetwork,
        address originTokenAddress,
        address wrappedTokenAddress,
        bytes metadata
    );

    /**
     * @notice Deposit add a new leaf to the merkle tree
     * @param destinationNetwork Network destination
     * @param destinationAddress Address destination
     * @param amount Amount of tokens
     * @param token Token address, 0 address is reserved for ether
     * @param forceUpdateGlobalExitRoot Indicates if the new global exit root is updated or not
     * @param permitData Raw data of the call `permit` of the token
     */
    function bridgeAsset(
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        address token,
        bool forceUpdateGlobalExitRoot,
        bytes calldata permitData
    ) public payable virtual ifNotEmergencyState nonReentrant {
        if (
            destinationNetwork == networkID ||
            destinationNetwork >= _CURRENT_SUPPORTED_NETWORKS
        ) {
            revert DestinationNetworkInvalid();
        }

        address originTokenAddress;
        uint32 originNetwork;
        bytes memory metadata;
        uint256 leafAmount = amount;

        if (token == address(0)) {
            // Ether transfer
            if (msg.value != amount) {
                revert AmountDoesNotMatchMsgValue();
            }

            // Ether is treated as ether from mainnet
            originNetwork = _MAINNET_NETWORK_ID;
        } else {
            // Check msg.value is 0 if tokens are bridged
            if (msg.value != 0) {
                revert MsgValueNotZero();
            }

            TokenInformation memory tokenInfo = wrappedTokenToTokenInfo[token];

            if (tokenInfo.originTokenAddress != address(0)) {
                // The token is a wrapped token from another network

                // Burn tokens
                TokenWrapped(token).burn(msg.sender, amount);

                originTokenAddress = tokenInfo.originTokenAddress;
                originNetwork = tokenInfo.originNetwork;
            } else {
                // Use permit if any
                if (permitData.length != 0) {
                    _permit(token, amount, permitData);
                }

                // In order to support fee tokens check the amount received, not the transferred
                uint256 balanceBefore = IERC20Upgradeable(token).balanceOf(
                    address(this)
                );
                IERC20Upgradeable(token).safeTransferFrom(
                    msg.sender,
                    address(this),
                    amount
                );
                uint256 balanceAfter = IERC20Upgradeable(token).balanceOf(
                    address(this)
                );

                // Override leafAmount with the received amount
                leafAmount = balanceAfter - balanceBefore;

                originTokenAddress = token;
                originNetwork = networkID;

                // Encode metadata
                metadata = abi.encode(
                    _safeName(token),
                    _safeSymbol(token),
                    _safeDecimals(token)
                );
            }
        }

        emit BridgeEvent(
            _LEAF_TYPE_ASSET,
            originNetwork,
            originTokenAddress,
            destinationNetwork,
            destinationAddress,
            leafAmount,
            metadata,
            uint32(depositCount)
        );

        _deposit(
            getLeafValue(
                _LEAF_TYPE_ASSET,
                originNetwork,
                originTokenAddress,
                destinationNetwork,
                destinationAddress,
                leafAmount,
                keccak256(metadata)
            )
        );
        // Update the new root to the global exit root manager if set by the user
        if (forceUpdateGlobalExitRoot) {
            _updateGlobalExitRoot();
        }
    }

    /**
     * @notice Bridge message and send ETH value
     * @param destinationNetwork Network destination
     * @param destinationAddress Address destination
     * @param forceUpdateGlobalExitRoot Indicates if the new global exit root is updated or not
     * @param metadata Message metadata
     */
    function bridgeMessage(
        uint32 destinationNetwork,
        address destinationAddress,
        bool forceUpdateGlobalExitRoot,
        bytes calldata metadata
    ) external payable ifNotEmergencyState {
        if (
            destinationNetwork == networkID ||
            destinationNetwork >= _CURRENT_SUPPORTED_NETWORKS
        ) {
            revert DestinationNetworkInvalid();
        }

        emit BridgeEvent(
            _LEAF_TYPE_MESSAGE,
            networkID,
            msg.sender,
            destinationNetwork,
            destinationAddress,
            msg.value,
            metadata,
            uint32(depositCount)
        );

        _deposit(
            getLeafValue(
                _LEAF_TYPE_MESSAGE,
                networkID,
                msg.sender,
                destinationNetwork,
                destinationAddress,
                msg.value,
                keccak256(metadata)
            )
        );

        // Update the new root to the global exit root manager if set by the user
        if (forceUpdateGlobalExitRoot) {
            _updateGlobalExitRoot();
        }
    }

    /**
     * @notice Verify merkle proof and withdraw tokens/ether
     * @param smtProof Smt proof
     * @param index Index of the leaf
     * @param mainnetExitRoot Mainnet exit root
     * @param rollupExitRoot Rollup exit root
     * @param originNetwork Origin network
     * @param originTokenAddress  Origin token address, 0 address is reserved for ether
     * @param destinationNetwork Network destination
     * @param destinationAddress Address destination
     * @param amount Amount of tokens
     * @param metadata Abi encoded metadata if any, empty otherwise
     */
    function claimAsset(
        bytes32[_DEPOSIT_CONTRACT_TREE_DEPTH] calldata smtProof,
        uint32 index,
        bytes32 mainnetExitRoot,
        bytes32 rollupExitRoot,
        uint32 originNetwork,
        address originTokenAddress,
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        bytes calldata metadata
    ) external ifNotEmergencyState {
        // Verify leaf exist and it does not have been claimed
        _verifyLeaf(
            smtProof,
            index,
            mainnetExitRoot,
            rollupExitRoot,
            originNetwork,
            originTokenAddress,
            destinationNetwork,
            destinationAddress,
            amount,
            metadata,
            _LEAF_TYPE_ASSET
        );

        // Transfer funds
        if (originTokenAddress == address(0)) {
            // Transfer ether
            /* solhint-disable avoid-low-level-calls */
            (bool success, ) = destinationAddress.call{value: amount}(
                new bytes(0)
            );
            if (!success) {
                revert EtherTransferFailed();
            }
        } else {
            // Transfer tokens
            if (originNetwork == networkID) {
                // The token is an ERC20 from this network
                IERC20Upgradeable(originTokenAddress).safeTransfer(
                    destinationAddress,
                    amount
                );
            } else {
                // The tokens is not from this network
                // Create a wrapper for the token if not exist yet
                bytes32 tokenInfoHash = keccak256(
                    abi.encodePacked(originNetwork, originTokenAddress)
                );
                address wrappedToken = tokenInfoToWrappedToken[tokenInfoHash];

                if (wrappedToken == address(0)) {
                    // Get ERC20 metadata
                    (
                        string memory name,
                        string memory symbol,
                        uint8 decimals
                    ) = abi.decode(metadata, (string, string, uint8));

                    // Create a new wrapped erc20 using create2
                    TokenWrapped newWrappedToken = (new TokenWrapped){
                        salt: tokenInfoHash
                    }(name, symbol, decimals);

                    // Mint tokens for the destination address
                    newWrappedToken.mint(destinationAddress, amount);

                    // Create mappings
                    tokenInfoToWrappedToken[tokenInfoHash] = address(
                        newWrappedToken
                    );

                    wrappedTokenToTokenInfo[
                        address(newWrappedToken)
                    ] = TokenInformation(originNetwork, originTokenAddress);

                    emit NewWrappedToken(
                        originNetwork,
                        originTokenAddress,
                        address(newWrappedToken),
                        metadata
                    );
                } else {
                    // Use the existing wrapped erc20
                    TokenWrapped(wrappedToken).mint(destinationAddress, amount);
                }
            }
        }

        emit ClaimEvent(
            index,
            originNetwork,
            originTokenAddress,
            destinationAddress,
            amount
        );
    }

    /**
     * @notice Verify merkle proof and execute message
     * If the receiving address is an EOA, the call will result as a success
     * Which means that the amount of ether will be transferred correctly, but the message
     * will not trigger any execution
     * @param smtProof Smt proof
     * @param index Index of the leaf
     * @param mainnetExitRoot Mainnet exit root
     * @param rollupExitRoot Rollup exit root
     * @param originNetwork Origin network
     * @param originAddress Origin address
     * @param destinationNetwork Network destination
     * @param destinationAddress Address destination
     * @param amount message value
     * @param metadata Abi encoded metadata if any, empty otherwise
     */
    function claimMessage(
        bytes32[_DEPOSIT_CONTRACT_TREE_DEPTH] calldata smtProof,
        uint32 index,
        bytes32 mainnetExitRoot,
        bytes32 rollupExitRoot,
        uint32 originNetwork,
        address originAddress,
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        bytes calldata metadata
    ) external ifNotEmergencyState {
        // Verify leaf exist and it does not have been claimed
        _verifyLeaf(
            smtProof,
            index,
            mainnetExitRoot,
            rollupExitRoot,
            originNetwork,
            originAddress,
            destinationNetwork,
            destinationAddress,
            amount,
            metadata,
            _LEAF_TYPE_MESSAGE
        );

        // Execute message
        // Transfer ether
        /* solhint-disable avoid-low-level-calls */
        (bool success, ) = destinationAddress.call{value: amount}(
            abi.encodeCall(
                IBridgeMessageReceiver.onMessageReceived,
                (originAddress, originNetwork, metadata)
            )
        );
        if (!success) {
            revert MessageFailed();
        }

        emit ClaimEvent(
            index,
            originNetwork,
            originAddress,
            destinationAddress,
            amount
        );
    }

    /**
     * @notice Returns the precalculated address of a wrapper using the token information
     * Note Updating the metadata of a token is not supported.
     * Since the metadata has relevance in the address deployed, this function will not return a valid
     * wrapped address if the metadata provided is not the original one.
     * @param originNetwork Origin network
     * @param originTokenAddress Origin token address, 0 address is reserved for ether
     * @param name Name of the token
     * @param symbol Symbol of the token
     * @param decimals Decimals of the token
     */
    function precalculatedWrapperAddress(
        uint32 originNetwork,
        address originTokenAddress,
        string calldata name,
        string calldata symbol,
        uint8 decimals
    ) external view returns (address) {
        bytes32 salt = keccak256(
            abi.encodePacked(originNetwork, originTokenAddress)
        );

        bytes32 hashCreate2 = keccak256(
            abi.encodePacked(
                bytes1(0xff),
                address(this),
                salt,
                keccak256(
                    abi.encodePacked(
                        type(TokenWrapped).creationCode,
                        abi.encode(name, symbol, decimals)
                    )
                )
            )
        );

        // last 20 bytes of hash to address
        return address(uint160(uint256(hashCreate2)));
    }

    /**
     * @notice Returns the address of a wrapper using the token information if already exist
     * @param originNetwork Origin network
     * @param originTokenAddress Origin token address, 0 address is reserved for ether
     */
    function getTokenWrappedAddress(
        uint32 originNetwork,
        address originTokenAddress
    ) external view returns (address) {
        return
            tokenInfoToWrappedToken[
                keccak256(abi.encodePacked(originNetwork, originTokenAddress))
            ];
    }

    /**
     * @notice Function to activate the emergency state
     " Only can be called by the Polygon ZK-EVM in extreme situations
     */
    function activateEmergencyState() external onlyPolygonZkEVM {
        _activateEmergencyState();
    }

    /**
     * @notice Function to deactivate the emergency state
     " Only can be called by the Polygon ZK-EVM
     */
    function deactivateEmergencyState() external onlyPolygonZkEVM {
        _deactivateEmergencyState();
    }

    /**
     * @notice Verify leaf and checks that it has not been claimed
     * @param smtProof Smt proof
     * @param index Index of the leaf
     * @param mainnetExitRoot Mainnet exit root
     * @param rollupExitRoot Rollup exit root
     * @param originNetwork Origin network
     * @param originAddress Origin address
     * @param destinationNetwork Network destination
     * @param destinationAddress Address destination
     * @param amount Amount of tokens
     * @param metadata Abi encoded metadata if any, empty otherwise
     * @param leafType Leaf type -->  [0] transfer Ether / ERC20 tokens, [1] message
     */
    function _verifyLeaf(
        bytes32[_DEPOSIT_CONTRACT_TREE_DEPTH] calldata smtProof,
        uint32 index,
        bytes32 mainnetExitRoot,
        bytes32 rollupExitRoot,
        uint32 originNetwork,
        address originAddress,
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        bytes calldata metadata,
        uint8 leafType
    ) internal {
        // Set and check nullifier
        _setAndCheckClaimed(index);

        // Check timestamp where the global exit root was set
        uint256 timestampGlobalExitRoot = globalExitRootManager
            .globalExitRootMap(
                GlobalExitRootLib.calculateGlobalExitRoot(
                    mainnetExitRoot,
                    rollupExitRoot
                )
            );

        if (timestampGlobalExitRoot == 0) {
            revert GlobalExitRootInvalid();
        }

        // Destination network must be networkID
        if (destinationNetwork != networkID) {
            revert DestinationNetworkInvalid();
        }

        bytes32 claimRoot;
        if (networkID == _MAINNET_NETWORK_ID) {
            // Verify merkle proof using rollup exit root
            claimRoot = rollupExitRoot;
        } else {
            // Verify merkle proof using mainnet exit root
            claimRoot = mainnetExitRoot;
        }
        if (
            !verifyMerkleProof(
                getLeafValue(
                    leafType,
                    originNetwork,
                    originAddress,
                    destinationNetwork,
                    destinationAddress,
                    amount,
                    keccak256(metadata)
                ),
                smtProof,
                index,
                claimRoot
            )
        ) {
            revert InvalidSmtProof();
        }
    }

    /**
     * @notice Function to check if an index is claimed or not
     * @param index Index
     */
    function isClaimed(uint256 index) external view returns (bool) {
        (uint256 wordPos, uint256 bitPos) = _bitmapPositions(index);
        uint256 mask = (1 << bitPos);
        return (claimedBitMap[wordPos] & mask) == mask;
    }

    /**
     * @notice Function to check that an index is not claimed and set it as claimed
     * @param index Index
     */
    function _setAndCheckClaimed(uint256 index) private {
        (uint256 wordPos, uint256 bitPos) = _bitmapPositions(index);
        uint256 mask = 1 << bitPos;
        uint256 flipped = claimedBitMap[wordPos] ^= mask;
        if (flipped & mask == 0) {
            revert AlreadyClaimed();
        }
    }

    /**
     * @notice Function to update the globalExitRoot if the last deposit is not submitted
     */
    function updateGlobalExitRoot() external {
        if (lastUpdatedDepositCount < depositCount) {
            _updateGlobalExitRoot();
        }
    }

    /**
     * @notice Function to update the globalExitRoot
     */
    function _updateGlobalExitRoot() internal {
        lastUpdatedDepositCount = uint32(depositCount);
        globalExitRootManager.updateExitRoot(getDepositRoot());
    }

    /**
     * @notice Function decode an index into a wordPos and bitPos
     * @param index Index
     */
    function _bitmapPositions(
        uint256 index
    ) private pure returns (uint256 wordPos, uint256 bitPos) {
        wordPos = uint248(index >> 8);
        bitPos = uint8(index);
    }

    /**
     * @notice Function to call token permit method of extended ERC20
     + @param token ERC20 token address
     * @param amount Quantity that is expected to be allowed
     * @param permitData Raw data of the call `permit` of the token
     */
    function _permit(
        address token,
        uint256 amount,
        bytes calldata permitData
    ) internal {
        bytes4 sig = bytes4(permitData[:4]);
        if (sig == _PERMIT_SIGNATURE) {
            (
                address owner,
                address spender,
                uint256 value,
                uint256 deadline,
                uint8 v,
                bytes32 r,
                bytes32 s
            ) = abi.decode(
                    permitData[4:],
                    (
                        address,
                        address,
                        uint256,
                        uint256,
                        uint8,
                        bytes32,
                        bytes32
                    )
                );
            if (owner != msg.sender) {
                revert NotValidOwner();
            }
            if (spender != address(this)) {
                revert NotValidSpender();
            }

            if (value != amount) {
                revert NotValidAmount();
            }

            // we call without checking the result, in case it fails and he doesn't have enough balance
            // the following transferFrom should be fail. This prevents DoS attacks from using a signature
            // before the smartcontract call
            /* solhint-disable avoid-low-level-calls */
            address(token).call(
                abi.encodeWithSelector(
                    _PERMIT_SIGNATURE,
                    owner,
                    spender,
                    value,
                    deadline,
                    v,
                    r,
                    s
                )
            );
        } else {
            if (sig != _PERMIT_SIGNATURE_DAI) {
                revert NotValidSignature();
            }

            (
                address holder,
                address spender,
                uint256 nonce,
                uint256 expiry,
                bool allowed,
                uint8 v,
                bytes32 r,
                bytes32 s
            ) = abi.decode(
                    permitData[4:],
                    (
                        address,
                        address,
                        uint256,
                        uint256,
                        bool,
                        uint8,
                        bytes32,
                        bytes32
                    )
                );

            if (holder != msg.sender) {
                revert NotValidOwner();
            }

            if (spender != address(this)) {
                revert NotValidSpender();
            }

            // we call without checking the result, in case it fails and he doesn't have enough balance
            // the following transferFrom should be fail. This prevents DoS attacks from using a signature
            // before the smartcontract call
            /* solhint-disable avoid-low-level-calls */
            address(token).call(
                abi.encodeWithSelector(
                    _PERMIT_SIGNATURE_DAI,
                    holder,
                    spender,
                    nonce,
                    expiry,
                    allowed,
                    v,
                    r,
                    s
                )
            );
        }
    }

    // Helpers to safely get the metadata from a token, inspired by https://github.com/traderjoe-xyz/joe-core/blob/main/contracts/MasterChefJoeV3.sol#L55-L95

    /**
     * @notice Provides a safe ERC20.symbol version which returns 'NO_SYMBOL' as fallback string
     * @param token The address of the ERC-20 token contract
     */
    function _safeSymbol(address token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeCall(IERC20MetadataUpgradeable.symbol, ())
        );
        return success ? _returnDataToString(data) : "NO_SYMBOL";
    }

    /**
     * @notice  Provides a safe ERC20.name version which returns 'NO_NAME' as fallback string.
     * @param token The address of the ERC-20 token contract.
     */
    function _safeName(address token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeCall(IERC20MetadataUpgradeable.name, ())
        );
        return success ? _returnDataToString(data) : "NO_NAME";
    }

    /**
     * @notice Provides a safe ERC20.decimals version which returns '18' as fallback value.
     * Note Tokens with (decimals > 255) are not supported
     * @param token The address of the ERC-20 token contract
     */
    function _safeDecimals(address token) internal view returns (uint8) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeCall(IERC20MetadataUpgradeable.decimals, ())
        );
        return success && data.length == 32 ? abi.decode(data, (uint8)) : 18;
    }

    /**
     * @notice Function to convert returned data to string
     * returns 'NOT_VALID_ENCODING' as fallback value.
     * @param data returned data
     */
    function _returnDataToString(
        bytes memory data
    ) internal pure returns (string memory) {
        if (data.length >= 64) {
            return abi.decode(data, (string));
        } else if (data.length == 32) {
            // Since the strings on bytes32 are encoded left-right, check the first zero in the data
            uint256 nonZeroBytes;
            while (nonZeroBytes < 32 && data[nonZeroBytes] != 0) {
                nonZeroBytes++;
            }

            // If the first one is 0, we do not handle the encoding
            if (nonZeroBytes == 0) {
                return "NOT_VALID_ENCODING";
            }
            // Create a byte array with nonZeroBytes length
            bytes memory bytesArray = new bytes(nonZeroBytes);
            for (uint256 i = 0; i < nonZeroBytes; i++) {
                bytesArray[i] = data[i];
            }
            return string(bytesArray);
        } else {
            return "NOT_VALID_ENCODING";
        }
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[],"name":"AlreadyClaimed","type":"error"},{"inputs":[],"name":"AmountDoesNotMatchMsgValue","type":"error"},{"inputs":[],"name":"DestinationNetworkInvalid","type":"error"},{"inputs":[],"name":"EtherTransferFailed","type":"error"},{"inputs":[],"name":"GlobalExitRootInvalid","type":"error"},{"inputs":[],"name":"InvalidSmtProof","type":"error"},{"inputs":[],"name":"MerkleTreeFull","type":"error"},{"inputs":[],"name":"MessageFailed","type":"error"},{"inputs":[],"name":"MsgValueNotZero","type":"error"},{"inputs":[],"name":"NotValidAmount","type":"error"},{"inputs":[],"name":"NotValidOwner","type":"error"},{"inputs":[],"name":"NotValidSignature","type":"error"},{"inputs":[],"name":"NotValidSpender","type":"error"},{"inputs":[],"name":"OnlyEmergencyState","type":"error"},{"inputs":[],"name":"OnlyNotEmergencyState","type":"error"},{"inputs":[],"name":"OnlyPolygonZkEVM","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"leafType","type":"uint8"},{"indexed":false,"internalType":"uint32","name":"originNetwork","type":"uint32"},{"indexed":false,"internalType":"address","name":"originAddress","type":"address"},{"indexed":false,"internalType":"uint32","name":"destinationNetwork","type":"uint32"},{"indexed":false,"internalType":"address","name":"destinationAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"bytes","name":"metadata","type":"bytes"},{"indexed":false,"internalType":"uint32","name":"depositCount","type":"uint32"}],"name":"BridgeEvent","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint32","name":"index","type":"uint32"},{"indexed":false,"internalType":"uint32","name":"originNetwork","type":"uint32"},{"indexed":false,"internalType":"address","name":"originAddress","type":"address"},{"indexed":false,"internalType":"address","name":"destinationAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"ClaimEvent","type":"event"},{"anonymous":false,"inputs":[],"name":"EmergencyStateActivated","type":"event"},{"anonymous":false,"inputs":[],"name":"EmergencyStateDeactivated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint32","name":"originNetwork","type":"uint32"},{"indexed":false,"internalType":"address","name":"originTokenAddress","type":"address"},{"indexed":false,"internalType":"address","name":"wrappedTokenAddress","type":"address"},{"indexed":false,"internalType":"bytes","name":"metadata","type":"bytes"}],"name":"NewWrappedToken","type":"event"},{"inputs":[],"name":"activateEmergencyState","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"destinationNetwork","type":"uint32"},{"internalType":"address","name":"destinationAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"token","type":"address"},{"internalType":"bool","name":"forceUpdateGlobalExitRoot","type":"bool"},{"internalType":"bytes","name":"permitData","type":"bytes"}],"name":"bridgeAsset","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint32","name":"destinationNetwork","type":"uint32"},{"internalType":"address","name":"destinationAddress","type":"address"},{"internalType":"bool","name":"forceUpdateGlobalExitRoot","type":"bool"},{"internalType":"bytes","name":"metadata","type":"bytes"}],"name":"bridgeMessage","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32[32]","name":"smtProof","type":"bytes32[32]"},{"internalType":"uint32","name":"index","type":"uint32"},{"internalType":"bytes32","name":"mainnetExitRoot","type":"bytes32"},{"internalType":"bytes32","name":"rollupExitRoot","type":"bytes32"},{"internalType":"uint32","name":"originNetwork","type":"uint32"},{"internalType":"address","name":"originTokenAddress","type":"address"},{"internalType":"uint32","name":"destinationNetwork","type":"uint32"},{"internalType":"address","name":"destinationAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"metadata","type":"bytes"}],"name":"claimAsset","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32[32]","name":"smtProof","type":"bytes32[32]"},{"internalType":"uint32","name":"index","type":"uint32"},{"internalType":"bytes32","name":"mainnetExitRoot","type":"bytes32"},{"internalType":"bytes32","name":"rollupExitRoot","type":"bytes32"},{"internalType":"uint32","name":"originNetwork","type":"uint32"},{"internalType":"address","name":"originAddress","type":"address"},{"internalType":"uint32","name":"destinationNetwork","type":"uint32"},{"internalType":"address","name":"destinationAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"metadata","type":"bytes"}],"name":"claimMessage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"claimedBitMap","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"deactivateEmergencyState","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"depositCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getDepositRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"leafType","type":"uint8"},{"internalType":"uint32","name":"originNetwork","type":"uint32"},{"internalType":"address","name":"originAddress","type":"address"},{"internalType":"uint32","name":"destinationNetwork","type":"uint32"},{"internalType":"address","name":"destinationAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes32","name":"metadataHash","type":"bytes32"}],"name":"getLeafValue","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint32","name":"originNetwork","type":"uint32"},{"internalType":"address","name":"originTokenAddress","type":"address"}],"name":"getTokenWrappedAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"globalExitRootManager","outputs":[{"internalType":"contractIBasePolygonZkEVMGlobalExitRoot","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"_networkID","type":"uint32"},{"internalType":"contractIBasePolygonZkEVMGlobalExitRoot","name":"_globalExitRootManager","type":"address"},{"internalType":"address","name":"_polygonZkEVMaddress","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"isClaimed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isEmergencyState","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastUpdatedDepositCount","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"networkID","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"polygonZkEVMaddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"originNetwork","type":"uint32"},{"internalType":"address","name":"originTokenAddress","type":"address"},{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"},{"internalType":"uint8","name":"decimals","type":"uint8"}],"name":"precalculatedWrapperAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"tokenInfoToWrappedToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"updateGlobalExitRoot","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"leafHash","type":"bytes32"},{"internalType":"bytes32[32]","name":"smtProof","type":"bytes32[32]"},{"internalType":"uint32","name":"index","type":"uint32"},{"internalType":"bytes32","name":"root","type":"bytes32"}],"name":"verifyMerkleProof","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"wrappedTokenToTokenInfo","outputs":[{"internalType":"uint32","name":"originNetwork","type":"uint32"},{"internalType":"address","name":"originTokenAddress","type":"address"}],"stateMutability":"view","type":"function"}]

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.