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// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;

import "./Lockable.sol";
import "./external/interfaces/WETH9Interface.sol";

import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";

// Polygon Registry contract that stores their addresses.
interface PolygonRegistry {
    function erc20Predicate() external returns (address);
}

// Polygon ERC20Predicate contract that handles Plasma exits (only used for Matic).
interface PolygonERC20Predicate {
    function startExitWithBurntTokens(bytes calldata data) external;
}

// ERC20s (on polygon) compatible with polygon's bridge have a withdraw method.
interface PolygonIERC20Upgradeable is IERC20Upgradeable {
    function withdraw(uint256 amount) external;
}

interface MaticToken {
    function withdraw(uint256 amount) external payable;
}

/**
 * @notice Contract deployed on Ethereum and Polygon to facilitate token transfers from Polygon to the HubPool and back.
 * @dev Because Polygon only allows withdrawals from a particular address to go to that same address on mainnet, we need to
 * have some sort of contract that can guarantee identical addresses on Polygon and Ethereum. This contract is intended
 * to be completely immutable, so it's guaranteed that the contract on each side is  configured identically as long as
 * it is created via create2. create2 is an alternative creation method that uses a different address determination
 * mechanism from normal create.
 * Normal create: address = hash(deployer_address, deployer_nonce)
 * create2:       address = hash(0xFF, sender, salt, bytecode)
 *  This ultimately allows create2 to generate deterministic addresses that don't depend on the transaction count of the
 * sender.
 */
contract PolygonTokenBridger is Lockable {
    using SafeERC20Upgradeable for PolygonIERC20Upgradeable;
    using SafeERC20Upgradeable for IERC20Upgradeable;

    // Gas token for Polygon.
    MaticToken public constant MATIC = MaticToken(0x0000000000000000000000000000000000001010);

    // Should be set to HubPool on Ethereum, or unused on Polygon.
    address public immutable destination;

    // Registry that stores L1 polygon addresses.
    PolygonRegistry public immutable l1PolygonRegistry;

    // WETH contract on Ethereum.
    WETH9Interface public immutable l1Weth;

    // Wrapped Matic on Polygon
    address public immutable l2WrappedMatic;

    // Chain id for the L1 that this contract is deployed on or communicates with.
    // For example: if this contract were meant to facilitate transfers from polygon to mainnet, this value would be
    // the mainnet chainId 1.
    uint256 public immutable l1ChainId;

    // Chain id for the L2 that this contract is deployed on or communicates with.
    // For example: if this contract were meant to facilitate transfers from polygon to mainnet, this value would be
    // the polygon chainId 137.
    uint256 public immutable l2ChainId;

    modifier onlyChainId(uint256 chainId) {
        _requireChainId(chainId);
        _;
    }

    /**
     * @notice Constructs Token Bridger contract.
     * @param _destination Where to send tokens to for this network.
     * @param _l1PolygonRegistry L1 registry that stores updated addresses of polygon contracts. This should always be
     * set to the L1 registry regardless if whether it's deployed on L2 or L1.
     * @param _l1Weth L1 WETH address.
     * @param _l2WrappedMatic L2 address of wrapped matic token.
     * @param _l1ChainId the chain id for the L1 in this environment.
     * @param _l2ChainId the chain id for the L2 in this environment.
     */
    constructor(
        address _destination,
        PolygonRegistry _l1PolygonRegistry,
        WETH9Interface _l1Weth,
        address _l2WrappedMatic,
        uint256 _l1ChainId,
        uint256 _l2ChainId
    ) {
        //slither-disable-next-line missing-zero-check
        destination = _destination;
        l1PolygonRegistry = _l1PolygonRegistry;
        l1Weth = _l1Weth;
        //slither-disable-next-line missing-zero-check
        l2WrappedMatic = _l2WrappedMatic;
        l1ChainId = _l1ChainId;
        l2ChainId = _l2ChainId;
    }

    /**
     * @notice Called by Polygon SpokePool to send tokens over bridge to contract with the same address as this.
     * @notice The caller of this function must approve this contract to spend amount of token.
     * @param token Token to bridge.
     * @param amount Amount to bridge.
     */
    function send(PolygonIERC20Upgradeable token, uint256 amount) public nonReentrant onlyChainId(l2ChainId) {
        token.safeTransferFrom(msg.sender, address(this), amount);

        // In the wMatic case, this unwraps. For other ERC20s, this is the burn/send action.
        token.withdraw(token.balanceOf(address(this)));

        // This takes the token that was withdrawn and calls withdraw on the "native" ERC20.
        if (address(token) == l2WrappedMatic) MATIC.withdraw{ value: address(this).balance }(address(this).balance);
    }

    /**
     * @notice Called by someone to send tokens to the destination, which should be set to the HubPool.
     * @param token Token to send to destination.
     */
    function retrieve(IERC20Upgradeable token) public nonReentrant onlyChainId(l1ChainId) {
        if (address(token) == address(l1Weth)) {
            // For WETH, there is a pre-deposit step to ensure any ETH that has been sent to the contract is captured.
            //slither-disable-next-line arbitrary-send-eth
            l1Weth.deposit{ value: address(this).balance }();
        }
        token.safeTransfer(destination, token.balanceOf(address(this)));
    }

    /**
     * @notice Called to initiate an l1 exit (withdrawal) of matic tokens that have been sent over the plasma bridge.
     * @param data the proof data to trigger the exit. Can be generated using the maticjs-plasma package.
     */
    function callExit(bytes memory data) public nonReentrant onlyChainId(l1ChainId) {
        PolygonERC20Predicate erc20Predicate = PolygonERC20Predicate(l1PolygonRegistry.erc20Predicate());
        erc20Predicate.startExitWithBurntTokens(data);
    }

    receive() external payable {
        // This method is empty to avoid any gas expendatures that might cause transfers to fail.
        // Note: the fact that there is _no_ code in this function means that matic can be erroneously transferred in
        // to the contract on the polygon side. These tokens would be locked indefinitely since the receive function
        // cannot be called on the polygon side. While this does have some downsides, the lack of any functionality
        // in this function means that it has no chance of running out of gas on transfers, which is a much more
        // important benefit. This just makes the matic token risk similar to that of ERC20s that are erroneously
        // sent to the contract.
    }

    function _requireChainId(uint256 chainId) internal view {
        require(block.chainid == chainId, "Cannot run method on this chain");
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/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.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
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].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20Upgradeable.sol";
import "../extensions/IERC20PermitUpgradeable.sol";
import "../../../utils/AddressUpgradeable.sol";

/**
 * @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;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20Upgradeable token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    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));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    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");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20Upgradeable token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    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");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation 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).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20Upgradeable token, bytes memory data) private returns (bool) {
        // 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 cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && AddressUpgradeable.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/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/v0.8.0/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 Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(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);
        }
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;

/**
 * @notice Interface for the WETH9 contract.
 */
interface WETH9Interface {
    /**
     * @notice Burn Wrapped Ether and receive native Ether.
     * @param wad Amount of WETH to unwrap and send to caller.
     */
    function withdraw(uint256 wad) external;

    /**
     * @notice Lock native Ether and mint Wrapped Ether ERC20
     * @dev msg.value is amount of Wrapped Ether to mint/Ether to lock.
     */
    function deposit() external payable;

    /**
     * @notice Get balance of WETH held by `guy`.
     * @param guy Address to get balance of.
     * @return wad Amount of WETH held by `guy`.
     */
    function balanceOf(address guy) external view returns (uint256 wad);

    /**
     * @notice Transfer `wad` of WETH from caller to `guy`.
     * @param guy Address to send WETH to.
     * @param wad Amount of WETH to send.
     * @return ok True if transfer succeeded.
     */
    function transfer(address guy, uint256 wad) external returns (bool);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;

/**
 * @title A contract that provides modifiers to prevent reentrancy to state-changing and view-only methods. This contract
 * is inspired by https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/ReentrancyGuard.sol
 * and https://github.com/balancer-labs/balancer-core/blob/master/contracts/BPool.sol.
 * @dev The reason why we use this local contract instead of importing from uma/contracts is because of the addition
 * of the internal method `functionCallStackOriginatesFromOutsideThisContract` which doesn't exist in the one exported
 * by uma/contracts.
 */
contract Lockable {
    bool internal _notEntered;

    constructor() {
        // Storing an initial 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.
        _notEntered = true;
    }

    /**
     * @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 state modification.
     */
    modifier nonReentrant() {
        _preEntranceCheck();
        _preEntranceSet();
        _;
        _postEntranceReset();
    }

    /**
     * @dev Designed to prevent a view-only method from being re-entered during a call to a nonReentrant() state-changing method.
     */
    modifier nonReentrantView() {
        _preEntranceCheck();
        _;
    }

    /**
     * @dev Returns true if the contract is currently in a non-entered state, meaning that the origination of the call
     * came from outside the contract. This is relevant with fallback/receive methods to see if the call came from ETH
     * being dropped onto the contract externally or due to ETH dropped on the the contract from within a method in this
     * contract, such as unwrapping WETH to ETH within the contract.
     */
    function functionCallStackOriginatesFromOutsideThisContract() internal view returns (bool) {
        return _notEntered;
    }

    // Internal methods are used to avoid copying the require statement's bytecode to every nonReentrant() method.
    // On entry into a function, _preEntranceCheck() should always be called to check if the function is being
    // re-entered. Then, if the function modifies state, it should call _postEntranceSet(), perform its logic, and
    // then call _postEntranceReset().
    // View-only methods can simply call _preEntranceCheck() to make sure that it is not being re-entered.
    function _preEntranceCheck() internal view {
        // On the first call to nonReentrant, _notEntered will be true
        require(_notEntered, "ReentrancyGuard: reentrant call");
    }

    function _preEntranceSet() internal {
        // Any calls to nonReentrant after this point will fail
        _notEntered = false;
    }

    function _postEntranceReset() internal {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _notEntered = true;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "viaIR": true,
  "debug": {
    "revertStrings": "strip"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

[{"inputs":[{"internalType":"address","name":"_destination","type":"address"},{"internalType":"contract PolygonRegistry","name":"_l1PolygonRegistry","type":"address"},{"internalType":"contract WETH9Interface","name":"_l1Weth","type":"address"},{"internalType":"address","name":"_l2WrappedMatic","type":"address"},{"internalType":"uint256","name":"_l1ChainId","type":"uint256"},{"internalType":"uint256","name":"_l2ChainId","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"MATIC","outputs":[{"internalType":"contract MaticToken","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"data","type":"bytes"}],"name":"callExit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"destination","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"l1ChainId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"l1PolygonRegistry","outputs":[{"internalType":"contract PolygonRegistry","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"l1Weth","outputs":[{"internalType":"contract WETH9Interface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"l2ChainId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"l2WrappedMatic","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20Upgradeable","name":"token","type":"address"}],"name":"retrieve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract PolygonIERC20Upgradeable","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"send","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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00000000000000000000000014224e63716aface30c9a417e0542281869f7d9e000000000000000000000000fe92f7c3a701e43d8479738c8844bcc555b9e5cd000000000000000000000000fff9976782d46cc05630d1f6ebab18b2324d6b14000000000000000000000000360ad4f9a9a8efe9a8dcb5f461c4cc1047e1dcf90000000000000000000000000000000000000000000000000000000000aa36a70000000000000000000000000000000000000000000000000000000000013882

-----Decoded View---------------
Arg [0] : _destination (address): 0x14224e63716afAcE30C9a417E0542281869f7d9e
Arg [1] : _l1PolygonRegistry (address): 0xfE92F7c3a701e43d8479738c8844bCc555b9e5CD
Arg [2] : _l1Weth (address): 0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14
Arg [3] : _l2WrappedMatic (address): 0x360ad4f9a9A8EFe9A8DCB5f461c4Cc1047E1Dcf9
Arg [4] : _l1ChainId (uint256): 11155111
Arg [5] : _l2ChainId (uint256): 80002

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 00000000000000000000000014224e63716aface30c9a417e0542281869f7d9e
Arg [1] : 000000000000000000000000fe92f7c3a701e43d8479738c8844bcc555b9e5cd
Arg [2] : 000000000000000000000000fff9976782d46cc05630d1f6ebab18b2324d6b14
Arg [3] : 000000000000000000000000360ad4f9a9a8efe9a8dcb5f461c4cc1047e1dcf9
Arg [4] : 0000000000000000000000000000000000000000000000000000000000aa36a7
Arg [5] : 0000000000000000000000000000000000000000000000000000000000013882