OptimismPortalCGT

{{
  "language": "Solidity",
  "sources": {
    "src/L1/OptimismPortalCGT.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// Contracts
import {Initializable} from "lib/openzeppelin-contracts/contracts/proxy/utils/Initializable.sol";
import {ResourceMetering} from "src/L1/ResourceMetering.sol";

// Libraries
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {SafeCall} from "src/libraries/SafeCall.sol";
import {Constants} from "src/libraries/Constants.sol";
import {Types} from "src/libraries/Types.sol";
import {Hashing} from "src/libraries/Hashing.sol";
import {SecureMerkleTrie} from "src/libraries/trie/SecureMerkleTrie.sol";
import {Predeploys} from "src/libraries/Predeploys.sol";
import {AddressAliasHelper} from "src/vendor/AddressAliasHelper.sol";
import {BadTarget, LargeCalldata, SmallGasLimit, TransferFailed, OnlyCustomGasToken, NoValue, Unauthorized, CallPaused, GasEstimation, NonReentrant, Unproven} from "src/libraries/PortalErrors.sol";

// Interfaces
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {ISemver} from "interfaces/universal/ISemver.sol";
import {IL2OutputOracle} from "interfaces/L1/IL2OutputOracle.sol";
import {ISystemConfig} from "interfaces/L1/ISystemConfig.sol";
import {IResourceMetering} from "interfaces/L1/IResourceMetering.sol";
import {ISuperchainConfig} from "interfaces/L1/ISuperchainConfig.sol";
import {IL1Block} from "interfaces/L2/IL1Block.sol";

/// @custom:proxied true
/// @title OptimismPortal
/// @notice The OptimismPortal is a low-level contract responsible for passing messages between L1
///         and L2. Messages sent directly to the OptimismPortal have no form of replayability.
///         Users are encouraged to use the L1CrossDomainMessenger for a higher-level interface.
contract OptimismPortalCGT is Initializable, ResourceMetering, ISemver {
    /// @notice Allows for interactions with non standard ERC20 tokens.
    using SafeERC20 for IERC20;

    /// @notice Represents a proven withdrawal.
    /// @custom:field outputRoot    Root of the L2 output this was proven against.
    /// @custom:field timestamp     Timestamp at whcih the withdrawal was proven.
    /// @custom:field l2OutputIndex Index of the output this was proven against.
    struct ProvenWithdrawal {
        bytes32 outputRoot;
        uint128 timestamp;
        uint128 l2OutputIndex;
    }

    /// @notice Version of the deposit event.
    uint256 internal constant DEPOSIT_VERSION = 0;

    /// @notice The L2 gas limit set when eth is deposited using the receive() function.
    uint64 internal constant RECEIVE_DEFAULT_GAS_LIMIT = 100_000;

    /// @notice The L2 gas limit for system deposit transactions that are initiated from L1.
    uint32 internal constant SYSTEM_DEPOSIT_GAS_LIMIT = 200_000;

    /// @notice Address of the L2 account which initiated a withdrawal in this transaction.
    ///         If the of this variable is the default L2 sender address, then we are NOT inside of
    ///         a call to finalizeWithdrawalTransaction.
    address public l2Sender;

    /// @notice A list of withdrawal hashes which have been successfully finalized.
    mapping(bytes32 => bool) public finalizedWithdrawals;

    /// @notice A mapping of withdrawal hashes to `ProvenWithdrawal` data.
    mapping(bytes32 => ProvenWithdrawal) public provenWithdrawals;

    /// @custom:legacy
    /// @custom:spacer paused
    /// @notice Spacer for backwards compatibility.
    bool private spacer_53_0_1;

    /// @notice Contract of the Superchain Config.
    ISuperchainConfig public superchainConfig;

    /// @notice Contract of the L2OutputOracle.
    /// @custom:network-specific
    IL2OutputOracle public l2Oracle;

    /// @notice Contract of the SystemConfig.
    /// @custom:network-specific
    ISystemConfig public systemConfig;

    /// @custom:spacer disputeGameFactory
    /// @notice Spacer for backwards compatibility.
    address private spacer_56_0_20;

    /// @custom:spacer provenWithdrawals
    /// @notice Spacer for backwards compatibility.
    bytes32 private spacer_57_0_32;

    /// @custom:spacer disputeGameBlacklist
    /// @notice Spacer for backwards compatibility.
    bytes32 private spacer_58_0_32;

    /// @custom:spacer respectedGameType + respectedGameTypeUpdatedAt
    /// @notice Spacer for backwards compatibility.
    bytes32 private spacer_59_0_32;

    /// @custom:spacer proofSubmitters
    /// @notice Spacer for backwards compatibility.
    bytes32 private spacer_60_0_32;

    /// @notice Represents the amount of native asset minted in L2. This may not
    ///         be 100% accurate due to the ability to send ether to the contract
    ///         without triggering a deposit transaction. It also is used to prevent
    ///         overflows for L2 account balances when custom gas tokens are used.
    ///         It is not safe to trust `ERC20.balanceOf` as it may lie.
    uint256 internal _balance;

    /// @notice Reserve extra slots in the storage layout for future upgrades.
    /// @dev Added by Frax Finance
    uint256[50] private __gap;

    // Kept for preventing old approval abuse
    address public FRXETH;

    address public immutable FRAX_COMPTROLLER;

    /// @notice Emitted when a transaction is deposited from L1 to L2.
    ///         The parameters of this event are read by the rollup node and used to derive deposit
    ///         transactions on L2.
    /// @param from       Address that triggered the deposit transaction.
    /// @param to         Address that the deposit transaction is directed to.
    /// @param version    Version of this deposit transaction event.
    /// @param opaqueData ABI encoded deposit data to be parsed off-chain.
    event TransactionDeposited(
        address indexed from,
        address indexed to,
        uint256 indexed version,
        bytes opaqueData
    );

    /// @notice Emitted when a withdrawal transaction is proven.
    /// @param withdrawalHash Hash of the withdrawal transaction.
    /// @param from           Address that triggered the withdrawal transaction.
    /// @param to             Address that the withdrawal transaction is directed to.
    event WithdrawalProven(
        bytes32 indexed withdrawalHash,
        address indexed from,
        address indexed to
    );

    /// @notice Emitted when a withdrawal transaction is finalized.
    /// @param withdrawalHash Hash of the withdrawal transaction.
    /// @param success        Whether the withdrawal transaction was successful.
    event WithdrawalFinalized(bytes32 indexed withdrawalHash, bool success);

    /// @notice Reverts when paused.
    modifier whenNotPaused() {
        if (paused()) revert CallPaused();
        _;
    }

    /// @notice Semantic version.
    /// @custom:semver 2.8.1-beta.4
    function version() public pure virtual returns (string memory) {
        return "2.8.1-beta.4";
    }

    /// @notice Constructs the OptimismPortal contract.
    constructor(address _fraxComptroller) {
        FRAX_COMPTROLLER = _fraxComptroller;

        initialize({
            _l2Oracle: IL2OutputOracle(address(0)),
            _systemConfig: ISystemConfig(address(0)),
            _superchainConfig: ISuperchainConfig(address(0)),
            _frxEthErc20Address: address(0)
        });
    }

    /// @notice Initializer.
    /// @param _l2Oracle Contract of the L2OutputOracle.
    /// @param _systemConfig Contract of the SystemConfig.
    /// @param _superchainConfig Contract of the SuperchainConfig.
    /// @param _frxEthErc20Address Address of frxETH
    function initialize(
        IL2OutputOracle _l2Oracle,
        ISystemConfig _systemConfig,
        ISuperchainConfig _superchainConfig,
        address _frxEthErc20Address
    ) public initializer {
        l2Oracle = _l2Oracle;
        systemConfig = _systemConfig;
        superchainConfig = _superchainConfig;
        FRXETH = _frxEthErc20Address;
        if (l2Sender == address(0)) {
            l2Sender = Constants.DEFAULT_L2_SENDER;
        }

        __ResourceMetering_init();
    }

    function mint(uint256 _amount, address _to, uint64 _gasLimit) public {
        require(msg.sender == FRAX_COMPTROLLER, "only comptroller");

        _balance += _amount;

        _depositTransaction({
            _to: _to,
            _mint: _amount,
            _value: _amount,
            _gasLimit: _gasLimit,
            _isCreation: false,
            _data: ""
        });
    }

    /// @notice Getter for the balance of the contract.
    function balance() public view returns (uint256) {
        (address token, ) = gasPayingToken();
        if (token == Constants.ETHER) {
            return address(this).balance;
        } else {
            return _balance;
        }
    }

    /// @notice Getter function for the address of the guardian.
    ///         Public getter is legacy and will be removed in the future. Use `SuperchainConfig.guardian()` instead.
    /// @return Address of the guardian.
    /// @custom:legacy
    function guardian() public view returns (address) {
        return superchainConfig.guardian();
    }

    /// @notice Getter for the current paused status.
    /// @return paused_ Whether or not the contract is paused.
    function paused() public view returns (bool paused_) {
        paused_ = superchainConfig.paused();
    }

    /// @notice Computes the minimum gas limit for a deposit.
    ///         The minimum gas limit linearly increases based on the size of the calldata.
    ///         This is to prevent users from creating L2 resource usage without paying for it.
    ///         This function can be used when interacting with the portal to ensure forwards
    ///         compatibility.
    /// @param _byteCount Number of bytes in the calldata.
    /// @return The minimum gas limit for a deposit.
    function minimumGasLimit(uint64 _byteCount) public pure returns (uint64) {
        return _byteCount * 16 + 21_000;
    }

    /// @notice Accepts value so that users can send ETH directly to this contract and have the
    ///         funds be deposited to their address on L2. This is intended as a convenience
    ///         function for EOAs. Contracts should call the depositTransaction() function directly
    ///         otherwise any deposited funds will be lost due to address aliasing.
    receive() external payable {
        depositTransaction(
            msg.sender,
            msg.value,
            RECEIVE_DEFAULT_GAS_LIMIT,
            false,
            bytes("")
        );
    }

    /// @notice Accepts ETH value without triggering a deposit to L2.
    ///         This function mainly exists for the sake of the migration between the legacy
    ///         Optimism system and Bedrock.
    function donateETH() external payable {
        // Intentionally empty.
    }

    /// @notice Returns the gas paying token and its decimals.
    function gasPayingToken()
        public
        view
        returns (address addr_, uint8 decimals_)
    {
        (addr_, decimals_) = systemConfig.gasPayingToken();
    }

    /// @notice Getter for the resource config.
    ///         Used internally by the ResourceMetering contract.
    ///         The SystemConfig is the source of truth for the resource config.
    /// @return ResourceMetering ResourceConfig
    function _resourceConfig()
        internal
        view
        override
        returns (ResourceConfig memory)
    {
        IResourceMetering.ResourceConfig memory config = systemConfig
            .resourceConfig();
        return
            ResourceConfig({
                maxResourceLimit: config.maxResourceLimit,
                elasticityMultiplier: config.elasticityMultiplier,
                baseFeeMaxChangeDenominator: config.baseFeeMaxChangeDenominator,
                minimumBaseFee: config.minimumBaseFee,
                systemTxMaxGas: config.systemTxMaxGas,
                maximumBaseFee: config.maximumBaseFee
            });
    }

    /// @notice Proves a withdrawal transaction.
    /// @param _tx              Withdrawal transaction to finalize.
    /// @param _l2OutputIndex   L2 output index to prove against.
    /// @param _outputRootProof Inclusion proof of the L2ToL1MessagePasser contract's storage root.
    /// @param _withdrawalProof Inclusion proof of the withdrawal in L2ToL1MessagePasser contract.
    function proveWithdrawalTransaction(
        Types.WithdrawalTransaction memory _tx,
        uint256 _l2OutputIndex,
        Types.OutputRootProof calldata _outputRootProof,
        bytes[] calldata _withdrawalProof
    ) external whenNotPaused {
        // Prevent users from creating a deposit transaction where this address is the message
        // sender on L2. Because this is checked here, we do not need to check again in
        // `finalizeWithdrawalTransaction`.
        if (_tx.target == address(this)) revert BadTarget();

        // Get the output root and load onto the stack to prevent multiple mloads. This will
        // revert if there is no output root for the given block number.
        bytes32 outputRoot = l2Oracle.getL2Output(_l2OutputIndex).outputRoot;

        // Verify that the output root can be generated with the elements in the proof.
        require(
            outputRoot == Hashing.hashOutputRootProof(_outputRootProof),
            "OptimismPortal: invalid output root proof"
        );

        // Load the ProvenWithdrawal into memory, using the withdrawal hash as a unique identifier.
        bytes32 withdrawalHash = Hashing.hashWithdrawal(_tx);
        ProvenWithdrawal memory provenWithdrawal = provenWithdrawals[
            withdrawalHash
        ];

        // We generally want to prevent users from proving the same withdrawal multiple times
        // because each successive proof will update the timestamp. A malicious user can take
        // advantage of this to prevent other users from finalizing their withdrawal. However,
        // since withdrawals are proven before an output root is finalized, we need to allow users
        // to re-prove their withdrawal only in the case that the output root for their specified
        // output index has been updated.
        require(
            provenWithdrawal.timestamp == 0 ||
                l2Oracle
                    .getL2Output(provenWithdrawal.l2OutputIndex)
                    .outputRoot !=
                provenWithdrawal.outputRoot,
            "OptimismPortal: withdrawal hash has already been proven"
        );

        // Compute the storage slot of the withdrawal hash in the L2ToL1MessagePasser contract.
        // Refer to the Solidity documentation for more information on how storage layouts are
        // computed for mappings.
        bytes32 storageKey = keccak256(
            abi.encode(
                withdrawalHash,
                uint256(0) // The withdrawals mapping is at the first slot in the layout.
            )
        );

        // Verify that the hash of this withdrawal was stored in the L2toL1MessagePasser contract
        // on L2. If this is true, under the assumption that the SecureMerkleTrie does not have
        // bugs, then we know that this withdrawal was actually triggered on L2 and can therefore
        // be relayed on L1.
        require(
            SecureMerkleTrie.verifyInclusionProof({
                _key: abi.encode(storageKey),
                _value: hex"01",
                _proof: _withdrawalProof,
                _root: _outputRootProof.messagePasserStorageRoot
            }),
            "OptimismPortal: invalid withdrawal inclusion proof"
        );

        // Designate the withdrawalHash as proven by storing the `outputRoot`, `timestamp`, and
        // `l2BlockNumber` in the `provenWithdrawals` mapping. A `withdrawalHash` can only be
        // proven once unless it is submitted again with a different outputRoot.
        provenWithdrawals[withdrawalHash] = ProvenWithdrawal({
            outputRoot: outputRoot,
            timestamp: uint128(block.timestamp),
            l2OutputIndex: uint128(_l2OutputIndex)
        });

        // Emit a `WithdrawalProven` event.
        emit WithdrawalProven(withdrawalHash, _tx.sender, _tx.target);
    }

    /// @notice Finalizes a withdrawal transaction.
    /// @param _tx Withdrawal transaction to finalize.
    function finalizeWithdrawalTransaction(
        Types.WithdrawalTransaction memory _tx
    ) external whenNotPaused {
        // Prevent old approval abuse
        require(_tx.target != FRXETH, "FraxchainPortal: can not target frxETH");

        // Make sure that the l2Sender has not yet been set. The l2Sender is set to a value other
        // than the default value when a withdrawal transaction is being finalized. This check is
        // a defacto reentrancy guard.
        if (l2Sender != Constants.DEFAULT_L2_SENDER) revert NonReentrant();

        // Grab the proven withdrawal from the `provenWithdrawals` map.
        bytes32 withdrawalHash = Hashing.hashWithdrawal(_tx);
        ProvenWithdrawal memory provenWithdrawal = provenWithdrawals[
            withdrawalHash
        ];

        // A withdrawal can only be finalized if it has been proven. We know that a withdrawal has
        // been proven at least once when its timestamp is non-zero. Unproven withdrawals will have
        // a timestamp of zero.
        require(
            provenWithdrawal.timestamp != 0,
            "OptimismPortal: withdrawal has not been proven yet"
        );

        // As a sanity check, we make sure that the proven withdrawal's timestamp is greater than
        // starting timestamp inside the L2OutputOracle. Not strictly necessary but extra layer of
        // safety against weird bugs in the proving step.
        require(
            provenWithdrawal.timestamp >= l2Oracle.startingTimestamp(),
            "OptimismPortal: withdrawal timestamp less than L2 Oracle starting timestamp"
        );

        // A proven withdrawal must wait at least the finalization period before it can be
        // finalized. This waiting period can elapse in parallel with the waiting period for the
        // output the withdrawal was proven against. In effect, this means that the minimum
        // withdrawal time is proposal submission time + finalization period.
        require(
            _isFinalizationPeriodElapsed(provenWithdrawal.timestamp),
            "OptimismPortal: proven withdrawal finalization period has not elapsed"
        );

        // Grab the OutputProposal from the L2OutputOracle, will revert if the output that
        // corresponds to the given index has not been proposed yet.
        Types.OutputProposal memory proposal = l2Oracle.getL2Output(
            provenWithdrawal.l2OutputIndex
        );

        // Check that the output root that was used to prove the withdrawal is the same as the
        // current output root for the given output index. An output root may change if it is
        // deleted by the challenger address and then re-proposed.
        require(
            proposal.outputRoot == provenWithdrawal.outputRoot,
            "OptimismPortal: output root proven is not the same as current output root"
        );

        // Check that the output proposal has also been finalized.
        require(
            _isFinalizationPeriodElapsed(proposal.timestamp),
            "OptimismPortal: output proposal finalization period has not elapsed"
        );

        // Check that this withdrawal has not already been finalized, this is replay protection.
        require(
            finalizedWithdrawals[withdrawalHash] == false,
            "OptimismPortal: withdrawal has already been finalized"
        );

        // Mark the withdrawal as finalized so it can't be replayed.
        finalizedWithdrawals[withdrawalHash] = true;

        // Set the l2Sender so contracts know who triggered this withdrawal on L2.
        // This acts as a reentrancy guard.
        l2Sender = _tx.sender;

        bool success;
        (address token, ) = gasPayingToken();
        if (token == Constants.ETHER) {
            // Trigger the call to the target contract. We use a custom low level method
            // SafeCall.callWithMinGas to ensure two key properties
            //   1. Target contracts cannot force this call to run out of gas by returning a very large
            //      amount of data (and this is OK because we don't care about the returndata here).
            //   2. The amount of gas provided to the execution context of the target is at least the
            //      gas limit specified by the user. If there is not enough gas in the current context
            //      to accomplish this, `callWithMinGas` will revert.
            success = SafeCall.callWithMinGas(
                _tx.target,
                _tx.gasLimit,
                _tx.value,
                _tx.data
            );
        } else {
            // Cannot call the token contract directly from the portal. This would allow an attacker
            // to call approve from a withdrawal and drain the balance of the portal.
            if (_tx.target == token) revert BadTarget();

            // Only transfer value when a non zero value is specified. This saves gas in the case of
            // using the standard bridge or arbitrary message passing.
            if (_tx.value != 0) {
                // Update the contracts internal accounting of the amount of native asset in L2.
                _balance -= _tx.value;

                // Read the balance of the target contract before the transfer so the consistency
                // of the transfer can be checked afterwards.
                uint256 startBalance = IERC20(token).balanceOf(address(this));

                // Transfer the ERC20 balance to the target, accounting for non standard ERC20
                // implementations that may not return a boolean. This reverts if the low level
                // call is not successful.
                IERC20(token).safeTransfer({to: _tx.target, value: _tx.value});

                // The balance must be transferred exactly.
                if (
                    IERC20(token).balanceOf(address(this)) !=
                    startBalance - _tx.value
                ) {
                    revert TransferFailed();
                }
            }

            // Make a call to the target contract only if there is calldata.
            if (_tx.data.length != 0) {
                success = SafeCall.callWithMinGas(
                    _tx.target,
                    _tx.gasLimit,
                    0,
                    _tx.data
                );
            } else {
                success = true;
            }
        }

        // Reset the l2Sender back to the default value.
        l2Sender = Constants.DEFAULT_L2_SENDER;

        // All withdrawals are immediately finalized. Replayability can
        // be achieved through contracts built on top of this contract
        emit WithdrawalFinalized(withdrawalHash, success);

        // Reverting here is useful for determining the exact gas cost to successfully execute the
        // sub call to the target contract if the minimum gas limit specified by the user would not
        // be sufficient to execute the sub call.
        if (success == false && tx.origin == Constants.ESTIMATION_ADDRESS) {
            revert GasEstimation();
        }
    }

    /// @notice Entrypoint to depositing an ERC20 token as a custom gas token.
    ///         This function depends on a well formed ERC20 token. There are only
    ///         so many checks that can be done on chain for this so it is assumed
    ///         that chain operators will deploy chains with well formed ERC20 tokens.
    /// @param _to         Target address on L2.
    /// @param _mint       Units of ERC20 token to deposit into L2.
    /// @param _value      Units of ERC20 token to send on L2 to the recipient.
    /// @param _gasLimit   Amount of L2 gas to purchase by burning gas on L1.
    /// @param _isCreation Whether or not the transaction is a contract creation.
    /// @param _data       Data to trigger the recipient with.
    function depositERC20Transaction(
        address _to,
        uint256 _mint,
        uint256 _value,
        uint64 _gasLimit,
        bool _isCreation,
        bytes memory _data
    ) public metered(_gasLimit) {
        // Can only be called if an ERC20 token is used for gas paying on L2
        (address token, ) = gasPayingToken();
        if (token == Constants.ETHER) revert OnlyCustomGasToken();

        // Gives overflow protection for L2 account balances.
        _balance += _mint;

        // Get the balance of the portal before the transfer.
        uint256 startBalance = IERC20(token).balanceOf(address(this));

        // Take ownership of the token. It is assumed that the user has given the portal an approval.
        IERC20(token).safeTransferFrom({
            from: msg.sender,
            to: address(this),
            value: _mint
        });

        // Double check that the portal now has the exact amount of token.
        if (IERC20(token).balanceOf(address(this)) != startBalance + _mint) {
            revert TransferFailed();
        }

        _depositTransaction({
            _to: _to,
            _mint: _mint,
            _value: _value,
            _gasLimit: _gasLimit,
            _isCreation: _isCreation,
            _data: _data
        });
    }

    /// @notice Accepts deposits of ETH and data, and emits a TransactionDeposited event for use in
    ///         deriving deposit transactions. Note that if a deposit is made by a contract, its
    ///         address will be aliased when retrieved using `tx.origin` or `msg.sender`. Consider
    ///         using the CrossDomainMessenger contracts for a simpler developer experience.
    /// @param _to         Target address on L2.
    /// @param _value      ETH value to send to the recipient.
    /// @param _gasLimit   Amount of L2 gas to purchase by burning gas on L1.
    /// @param _isCreation Whether or not the transaction is a contract creation.
    /// @param _data       Data to trigger the recipient with.
    function depositTransaction(
        address _to,
        uint256 _value,
        uint64 _gasLimit,
        bool _isCreation,
        bytes memory _data
    ) public payable metered(_gasLimit) {
        (address token, ) = gasPayingToken();
        if (token != Constants.ETHER && msg.value != 0) revert NoValue();

        _depositTransaction({
            _to: _to,
            _mint: msg.value,
            _value: _value,
            _gasLimit: _gasLimit,
            _isCreation: _isCreation,
            _data: _data
        });
    }

    /// @notice Common logic for creating deposit transactions.
    /// @param _to         Target address on L2.
    /// @param _mint       Units of asset to deposit into L2.
    /// @param _value      Units of asset to send on L2 to the recipient.
    /// @param _gasLimit   Amount of L2 gas to purchase by burning gas on L1.
    /// @param _isCreation Whether or not the transaction is a contract creation.
    /// @param _data       Data to trigger the recipient with.
    function _depositTransaction(
        address _to,
        uint256 _mint,
        uint256 _value,
        uint64 _gasLimit,
        bool _isCreation,
        bytes memory _data
    ) internal {
        // Just to be safe, make sure that people specify address(0) as the target when doing
        // contract creations.
        if (_isCreation && _to != address(0)) revert BadTarget();

        // Prevent depositing transactions that have too small of a gas limit. Users should pay
        // more for more resource usage.
        if (_gasLimit < minimumGasLimit(uint64(_data.length)))
            revert SmallGasLimit();

        // Prevent the creation of deposit transactions that have too much calldata. This gives an
        // upper limit on the size of unsafe blocks over the p2p network. 120kb is chosen to ensure
        // that the transaction can fit into the p2p network policy of 128kb even though deposit
        // transactions are not gossipped over the p2p network.
        if (_data.length > 120_000) revert LargeCalldata();

        // Transform the from-address to its alias if the caller is a contract.
        address from = msg.sender;
        if (msg.sender != tx.origin) {
            from = AddressAliasHelper.applyL1ToL2Alias(msg.sender);
        }

        // Compute the opaque data that will be emitted as part of the TransactionDeposited event.
        // We use opaque data so that we can update the TransactionDeposited event in the future
        // without breaking the current interface.
        bytes memory opaqueData = abi.encodePacked(
            _mint,
            _value,
            _gasLimit,
            _isCreation,
            _data
        );

        // Emit a TransactionDeposited event so that the rollup node can derive a deposit
        // transaction for this deposit.
        emit TransactionDeposited(from, _to, DEPOSIT_VERSION, opaqueData);
    }

    /// @notice Sets the gas paying token for the L2 system. This token is used as the
    ///         L2 native asset. Only the SystemConfig contract can call this function.
    function setGasPayingToken(
        address _token,
        uint8 _decimals,
        bytes32 _name,
        bytes32 _symbol
    ) external {
        if (msg.sender != address(systemConfig)) revert Unauthorized();

        // Set L2 deposit gas as used without paying burning gas. Ensures that deposits cannot use too much L2 gas.
        // This value must be large enough to cover the cost of calling `L1Block.setGasPayingToken`.
        useGas(SYSTEM_DEPOSIT_GAS_LIMIT);

        // Emit the special deposit transaction directly that sets the gas paying
        // token in the L1Block predeploy contract.
        emit TransactionDeposited(
            Constants.DEPOSITOR_ACCOUNT,
            Predeploys.L1_BLOCK_ATTRIBUTES,
            DEPOSIT_VERSION,
            abi.encodePacked(
                uint256(0), // mint
                uint256(0), // value
                uint64(SYSTEM_DEPOSIT_GAS_LIMIT), // gasLimit
                false, // isCreation,
                abi.encodeCall(
                    IL1Block.setGasPayingToken,
                    (_token, _decimals, _name, _symbol)
                )
            )
        );
    }

    /// @notice Determine if a given output is finalized.
    ///         Reverts if the call to l2Oracle.getL2Output reverts.
    ///         Returns a boolean otherwise.
    /// @param _l2OutputIndex Index of the L2 output to check.
    /// @return Whether or not the output is finalized.
    function isOutputFinalized(
        uint256 _l2OutputIndex
    ) external view returns (bool) {
        return
            _isFinalizationPeriodElapsed(
                l2Oracle.getL2Output(_l2OutputIndex).timestamp
            );
    }

    /// @notice Determines whether the finalization period has elapsed with respect to
    ///         the provided block timestamp.
    /// @param _timestamp Timestamp to check.
    /// @return Whether or not the finalization period has elapsed.
    function _isFinalizationPeriodElapsed(
        uint256 _timestamp
    ) internal view returns (bool) {
        return
            block.timestamp >
            _timestamp + l2Oracle.FINALIZATION_PERIOD_SECONDS();
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/proxy/utils/Initializable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/Address.sol";

/**
 * @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. Equivalent to `reinitializer(1)`.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!Address.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.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so 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.
     *
     * 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.
     */
    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.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }
}
"
    },
    "src/L1/ResourceMetering.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

// Contracts
import { Initializable } from "@openzeppelin/contracts/proxy/utils/Initializable.sol";

// Libraries
import { Math } from "@openzeppelin/contracts/utils/math/Math.sol";
import { Burn } from "src/libraries/Burn.sol";
import { Arithmetic } from "src/libraries/Arithmetic.sol";

/// @custom:upgradeable
/// @title ResourceMetering
/// @notice ResourceMetering implements an EIP-1559 style resource metering system where pricing
///         updates automatically based on current demand.
abstract contract ResourceMetering is Initializable {
    /// @notice Error returned when too much gas resource is consumed.
    error OutOfGas();

    /// @notice Represents the various parameters that control the way in which resources are
    ///         metered. Corresponds to the EIP-1559 resource metering system.
    /// @custom:field prevBaseFee   Base fee from the previous block(s).
    /// @custom:field prevBoughtGas Amount of gas bought so far in the current block.
    /// @custom:field prevBlockNum  Last block number that the base fee was updated.
    struct ResourceParams {
        uint128 prevBaseFee;
        uint64 prevBoughtGas;
        uint64 prevBlockNum;
    }

    /// @notice Represents the configuration for the EIP-1559 based curve for the deposit gas
    ///         market. These values should be set with care as it is possible to set them in
    ///         a way that breaks the deposit gas market. The target resource limit is defined as
    ///         maxResourceLimit / elasticityMultiplier. This struct was designed to fit within a
    ///         single word. There is additional space for additions in the future.
    /// @custom:field maxResourceLimit             Represents the maximum amount of deposit gas that
    ///                                            can be purchased per block.
    /// @custom:field elasticityMultiplier         Determines the target resource limit along with
    ///                                            the resource limit.
    /// @custom:field baseFeeMaxChangeDenominator  Determines max change on fee per block.
    /// @custom:field minimumBaseFee               The min deposit base fee, it is clamped to this
    ///                                            value.
    /// @custom:field systemTxMaxGas               The amount of gas supplied to the system
    ///                                            transaction. This should be set to the same
    ///                                            number that the op-node sets as the gas limit
    ///                                            for the system transaction.
    /// @custom:field maximumBaseFee               The max deposit base fee, it is clamped to this
    ///                                            value.
    struct ResourceConfig {
        uint32 maxResourceLimit;
        uint8 elasticityMultiplier;
        uint8 baseFeeMaxChangeDenominator;
        uint32 minimumBaseFee;
        uint32 systemTxMaxGas;
        uint128 maximumBaseFee;
    }

    /// @notice EIP-1559 style gas parameters.
    ResourceParams public params;

    /// @notice Reserve extra slots (to a total of 50) in the storage layout for future upgrades.
    uint256[48] private __gap;

    /// @notice Meters access to a function based an amount of a requested resource.
    /// @param _amount Amount of the resource requested.
    modifier metered(uint64 _amount) {
        // Record initial gas amount so we can refund for it later.
        uint256 initialGas = gasleft();

        // Run the underlying function.
        _;

        // Run the metering function.
        _metered(_amount, initialGas);
    }

    /// @notice An internal function that holds all of the logic for metering a resource.
    /// @param _amount     Amount of the resource requested.
    /// @param _initialGas The amount of gas before any modifier execution.
    function _metered(uint64 _amount, uint256 _initialGas) internal {
        // Update block number and base fee if necessary.
        uint256 blockDiff = block.number - params.prevBlockNum;

        ResourceConfig memory config = _resourceConfig();
        int256 targetResourceLimit =
            int256(uint256(config.maxResourceLimit)) / int256(uint256(config.elasticityMultiplier));

        if (blockDiff > 0) {
            // Handle updating EIP-1559 style gas parameters. We use EIP-1559 to restrict the rate
            // at which deposits can be created and therefore limit the potential for deposits to
            // spam the L2 system. Fee scheme is very similar to EIP-1559 with minor changes.
            int256 gasUsedDelta = int256(uint256(params.prevBoughtGas)) - targetResourceLimit;
            int256 baseFeeDelta = (int256(uint256(params.prevBaseFee)) * gasUsedDelta)
                / (targetResourceLimit * int256(uint256(config.baseFeeMaxChangeDenominator)));

            // Update base fee by adding the base fee delta and clamp the resulting value between
            // min and max.
            int256 newBaseFee = Arithmetic.clamp({
                _value: int256(uint256(params.prevBaseFee)) + baseFeeDelta,
                _min: int256(uint256(config.minimumBaseFee)),
                _max: int256(uint256(config.maximumBaseFee))
            });

            // If we skipped more than one block, we also need to account for every empty block.
            // Empty block means there was no demand for deposits in that block, so we should
            // reflect this lack of demand in the fee.
            if (blockDiff > 1) {
                // Update the base fee by repeatedly applying the exponent 1-(1/change_denominator)
                // blockDiff - 1 times. Simulates multiple empty blocks. Clamp the resulting value
                // between min and max.
                newBaseFee = Arithmetic.clamp({
                    _value: Arithmetic.cdexp({
                        _coefficient: newBaseFee,
                        _denominator: int256(uint256(config.baseFeeMaxChangeDenominator)),
                        _exponent: int256(blockDiff - 1)
                    }),
                    _min: int256(uint256(config.minimumBaseFee)),
                    _max: int256(uint256(config.maximumBaseFee))
                });
            }

            // Update new base fee, reset bought gas, and update block number.
            params.prevBaseFee = uint128(uint256(newBaseFee));
            params.prevBoughtGas = 0;
            params.prevBlockNum = uint64(block.number);
        }

        // Make sure we can actually buy the resource amount requested by the user.
        params.prevBoughtGas += _amount;
        if (int256(uint256(params.prevBoughtGas)) > int256(uint256(config.maxResourceLimit))) {
            revert OutOfGas();
        }

        // Determine the amount of ETH to be paid.
        uint256 resourceCost = uint256(_amount) * uint256(params.prevBaseFee);

        // We currently charge for this ETH amount as an L1 gas burn, so we convert the ETH amount
        // into gas by dividing by the L1 base fee. We assume a minimum base fee of 1 gwei to avoid
        // division by zero for L1s that don't support 1559 or to avoid excessive gas burns during
        // periods of extremely low L1 demand. One-day average gas fee hasn't dipped below 1 gwei
        // during any 1 day period in the last 5 years, so should be fine.
        uint256 gasCost = resourceCost / Math.max(block.basefee, 1 gwei);

        // Give the user a refund based on the amount of gas they used to do all of the work up to
        // this point. Since we're at the end of the modifier, this should be pretty accurate. Acts
        // effectively like a dynamic stipend (with a minimum value).
        uint256 usedGas = _initialGas - gasleft();
        if (gasCost > usedGas) {
            Burn.gas(gasCost - usedGas);
        }
    }

    /// @notice Adds an amount of L2 gas consumed to the prev bought gas params. This is meant to be used
    ///         when L2 system transactions are generated from L1.
    /// @param _amount Amount of the L2 gas resource requested.
    function useGas(uint32 _amount) internal {
        params.prevBoughtGas += uint64(_amount);
    }

    /// @notice Virtual function that returns the resource config.
    ///         Contracts that inherit this contract must implement this function.
    /// @return ResourceConfig
    function _resourceConfig() internal virtual returns (ResourceConfig memory);

    /// @notice Sets initial resource parameter values.
    ///         This function must either be called by the initializer function of an upgradeable
    ///         child contract.
    function __ResourceMetering_init() internal onlyInitializing {
        if (params.prevBlockNum == 0) {
            params = ResourceParams({ prevBaseFee: 1 gwei, prevBoughtGas: 0, prevBlockNum: uint64(block.number) });
        }
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../utils/Address.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 SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 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(
        IERC20 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(
        IERC20 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(
        IERC20 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(
        IERC20Permit 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(IERC20 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");
        }
    }
}
"
    },
    "src/libraries/SafeCall.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @title SafeCall
/// @notice Perform low level safe calls
library SafeCall {
    /// @notice Performs a low level call without copying any returndata.
    /// @dev Passes no calldata to the call context.
    /// @param _target   Address to call
    /// @param _gas      Amount of gas to pass to the call
    /// @param _value    Amount of value to pass to the call
    function send(address _target, uint256 _gas, uint256 _value) internal returns (bool success_) {
        assembly {
            success_ :=
                call(
                    _gas, // gas
                    _target, // recipient
                    _value, // ether value
                    0, // inloc
                    0, // inlen
                    0, // outloc
                    0 // outlen
                )
        }
    }

    /// @notice Perform a low level call with all gas without copying any returndata
    /// @param _target   Address to call
    /// @param _value    Amount of value to pass to the call
    function send(address _target, uint256 _value) internal returns (bool success_) {
        success_ = send(_target, gasleft(), _value);
    }

    /// @notice Perform a low level call without copying any returndata
    /// @param _target   Address to call
    /// @param _gas      Amount of gas to pass to the call
    /// @param _value    Amount of value to pass to the call
    /// @param _calldata Calldata to pass to the call
    function call(
        address _target,
        uint256 _gas,
        uint256 _value,
        bytes memory _calldata
    )
        internal
        returns (bool success_)
    {
        assembly {
            success_ :=
                call(
                    _gas, // gas
                    _target, // recipient
                    _value, // ether value
                    add(_calldata, 32), // inloc
                    mload(_calldata), // inlen
                    0, // outloc
                    0 // outlen
                )
        }
    }

    /// @notice Perform a low level call without copying any returndata
    /// @param _target   Address to call
    /// @param _value    Amount of value to pass to the call
    /// @param _calldata Calldata to pass to the call
    function call(address _target, uint256 _value, bytes memory _calldata) internal returns (bool success_) {
        success_ = call({ _target: _target, _gas: gasleft(), _value: _value, _calldata: _calldata });
    }

    /// @notice Perform a low level call without copying any returndata
    /// @param _target   Address to call
    /// @param _calldata Calldata to pass to the call
    function call(address _target, bytes memory _calldata) internal returns (bool success_) {
        success_ = call({ _target: _target, _gas: gasleft(), _value: 0, _calldata: _calldata });
    }

    /// @notice Helper function to determine if there is sufficient gas remaining within the context
    ///         to guarantee that the minimum gas requirement for a call will be met as well as
    ///         optionally reserving a specified amount of gas for after the call has concluded.
    /// @param _minGas      The minimum amount of gas that may be passed to the target context.
    /// @param _reservedGas Optional amount of gas to reserve for the caller after the execution
    ///                     of the target context.
    /// @return `true` if there is enough gas remaining to safely supply `_minGas` to the target
    ///         context as well as reserve `_reservedGas` for the caller after the execution of
    ///         the target context.
    /// @dev !!!!! FOOTGUN ALERT !!!!!
    ///      1.) The 40_000 base buffer is to account for the worst case of the dynamic cost of the
    ///          `CALL` opcode's `address_access_cost`, `positive_value_cost`, and
    ///          `value_to_empty_account_cost` factors with an added buffer of 5,700 gas. It is
    ///          still possible to self-rekt by initiating a withdrawal with a minimum gas limit
    ///          that does not account for the `memory_expansion_cost` & `code_execution_cost`
    ///          factors of the dynamic cost of the `CALL` opcode.
    ///      2.) This function should *directly* precede the external call if possible. There is an
    ///          added buffer to account for gas consumed between this check and the call, but it
    ///          is only 5,700 gas.
    ///      3.) Because EIP-150 ensures that a maximum of 63/64ths of the remaining gas in the call
    ///          frame may be passed to a subcontext, we need to ensure that the gas will not be
    ///          truncated.
    ///      4.) Use wisely. This function is not a silver bullet.
    function hasMinGas(uint256 _minGas, uint256 _reservedGas) internal view returns (bool) {
        bool _hasMinGas;
        assembly {
            // Equation: gas × 63 ≥ minGas × 64 + 63(40_000 + reservedGas)
            _hasMinGas := iszero(lt(mul(gas(), 63), add(mul(_minGas, 64), mul(add(40000, _reservedGas), 63))))
        }
        return _hasMinGas;
    }

    /// @notice Perform a low level call without copying any returndata. This function
    ///         will revert if the call cannot be performed with the specified minimum
    ///         gas.
    /// @param _target   Address to call
    /// @param _minGas   The minimum amount of gas that may be passed to the call
    /// @param _value    Amount of value to pass to the call
    /// @param _calldata Calldata to pass to the call
    function callWithMinGas(
        address _target,
        uint256 _minGas,
        uint256 _value,
        bytes memory _calldata
    )
        internal
        returns (bool)
    {
        bool _success;
        bool _hasMinGas = hasMinGas(_minGas, 0);
        assembly {
            // Assertion: gasleft() >= (_minGas * 64) / 63 + 40_000
            if iszero(_hasMinGas) {
                // Store the "Error(string)" selector in scratch space.
                mstore(0, 0x08c379a0)
                // Store the pointer to the string length in scratch space.
                mstore(32, 32)
                // Store the string.
                //
                // SAFETY:
                // - We pad the beginning of the string with two zero bytes as well as the
                // length (24) to ensure that we override the free memory pointer at offset
                // 0x40. This is necessary because the free memory pointer is likely to
                // be greater than 1 byte when this function is called, but it is incredibly
                // unlikely that it will be greater than 3 bytes. As for the data within
                // 0x60, it is ensured that it is 0 due to 0x60 being the zero offset.
                // - It's fine to clobber the free memory pointer, we're reverting.
                mstore(88, 0x0000185361666543616c6c3a204e6f7420656e6f75676820676173)

                // Revert with 'Error("SafeCall: Not enough gas")'
                revert(28, 100)
            }

            // The call will be supplied at least ((_minGas * 64) / 63) gas due to the
            // above assertion. This ensures that, in all circumstances (except for when the
            // `_minGas` does not account for the `memory_expansion_cost` and `code_execution_cost`
            // factors of the dynamic cost of the `CALL` opcode), the call will receive at least
            // the minimum amount of gas specified.
            _success :=
                call(
                    gas(), // gas
                    _target, // recipient
                    _value, // ether value
                    add(_calldata, 32), // inloc
                    mload(_calldata), // inlen
                    0x00, // outloc
                    0x00 // outlen
                )
        }
        return _success;
    }
}
"
    },
    "src/libraries/Constants.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// Interfaces
import { IResourceMetering } from "interfaces/L1/IResourceMetering.sol";

/// @title Constants
/// @notice Constants is a library for storing constants. Simple! Don't put everything in here, just
///         the stuff used in multiple contracts. Constants that only apply to a single contract
///         should be defined in that contract instead.
library Constants {
    /// @notice Special address to be used as the tx origin for gas estimation calls in the
    ///         OptimismPortal and CrossDomainMessenger calls. You only need to use this address if
    ///         the minimum gas limit specified by the user is not actually enough to execute the
    ///         given message and you're attempting to estimate the actual necessary gas limit. We
    ///         use address(1) because it's the ecrecover precompile and therefore guaranteed to
    ///         never have any code on any EVM chain.
    address internal constant ESTIMATION_ADDRESS = address(1);

    /// @notice Value used for the L2 sender storage slot in both the OptimismPortal and the
    ///         CrossDomainMessenger contracts before an actual sender is set. This value is
    ///         non-zero to reduce the gas cost of message passing transactions.
    address internal constant DEFAULT_L2_SENDER = 0x000000000000000000000000000000000000dEaD;

    /// @notice The storage slot that holds the address of a proxy implementation.
    /// @dev `bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)`
    bytes32 internal constant PROXY_IMPLEMENTATION_ADDRESS =
        0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /// @notice The storage slot that holds the address of the owner.
    /// @dev `bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1)`
    bytes32 internal constant PROXY_OWNER_ADDRESS = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /// @notice The address that represents ether when dealing with ERC20 token addresses.
    address internal constant ETHER = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    /// @notice The address that represents the system caller responsible for L1 attributes
    ///         transactions.
    address internal constant DEPOSITOR_ACCOUNT = 0xDeaDDEaDDeAdDeAdDEAdDEaddeAddEAdDEAd0001;

    /// @notice Returns the default values for the ResourceConfig. These are the recommended values
    ///         for a production network.
    function DEFAULT_RESOURCE_CONFIG() internal pure returns (IResourceMetering.ResourceConfig memory) {
        IResourceMetering.ResourceConfig memory config = IResourceMetering.ResourceConfig({
            maxResourceLimit: 20_000_000,
            elasticityMultiplier: 10,
            baseFeeMaxChangeDenominator: 8,
            minimumBaseFee: 1 gwei,
            systemTxMaxGas: 1_000_000,
            maximumBaseFee: type(uint128).max
        });
        return config;
    }
}
"
    },
    "src/libraries/Types.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @title Types
/// @notice Contains various types used throughout the Optimism contract system.
library Types {
    /// @notice OutputProposal represents a commitment to the L2 state. The timestamp is the L1
    ///         timestamp that the output root is posted. This timestamp is used to verify that the
    ///         finalization period has passed since the output root was submitted.
    /// @custom:field outputRoot    Hash of the L2 output.
    /// @custom:field timestamp     Timestamp of the L1 block that the output root was submitted in.
    /// @custom:field l2BlockNumber L2 block number that the output corresponds to.
    struct OutputProposal {
        bytes32 outputRoot;
        uint128 timestamp;
        uint128 l2BlockNumber;
    }

    /// @notice Struct representing the elements that are hashed together to generate an output root
    ///         which itself represents a snapshot of the L2 state.
    /// @custom:field version                  Version of the output root.
    /// @custom:field stateRoot                Root of the state trie at the block of this output.
    /// @custom:field messagePasserStorageRoot Root of the message passer storage trie.
    /// @custom:field latestBlockhash          Hash of the block this output was generated from.
    struct OutputRootProof {
        bytes32 version;
        bytes32 stateRoot;
        bytes32 messagePasserStorageRoot;
        bytes32 latestBlockhash;
    }

    /// @notice Struct representing a deposit transaction (L1 => L2 transaction) created by an end
    ///         user (as opposed to a system deposit transaction generated by the system).
    /// @custom:field from        Address of the sender of the transaction.
    /// @custom:field to          Address of the recipient of the transaction.
    /// @custom:field isCreation  True if the transaction is a contract creation.
    /// @custom:field value       Value to send to the recipient.
    /// @custom:field mint        Amount of ETH to mint.
    /// @custom:field gasLimit    Gas limit of the transaction.
    /// @custom