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

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

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { BridgeHubInterface } from "../interfaces/ZkStackBridgeHub.sol";

/**
 * @notice Interface for funder contract that this contract pulls from to pay for relayMessage()/relayTokens()
 * fees using a custom gas token.
 */
interface FunderInterface {
    /**
     * @notice Withdraws amount of token from funder contract to the caller.
     * @dev Can only be called by owner of Funder contract, which therefore must be
     * this contract.
     * @param token Token to withdraw.
     * @param amount Amount to withdraw.
     */
    function withdraw(IERC20 token, uint256 amount) external;
}

/**
 * @notice Contract containing logic to send messages from L1 to ZkStack with a custom gas token.
 * @dev Public functions calling external contracts do not guard against reentrancy because they are expected to be
 * called via delegatecall, which will execute this contract's logic within the context of the originating contract.
 * For example, the HubPool will delegatecall these functions, therefore its only necessary that the HubPool's methods
 * that call this contract's logic guard against reentrancy.
 * @custom:security-contact [email protected]
 */

// solhint-disable-next-line contract-name-camelcase
contract ZkStack_CustomGasToken_Adapter is AdapterInterface {
    using SafeERC20 for IERC20;

    // The ZkSync bridgehub contract treats address(1) to represent ETH.
    address private constant ETH_TOKEN_ADDRESS = address(1);

    // We need to pay a base fee to the operator to include our L1 --> L2 transaction.
    // https://docs.zksync.io/build/developer-reference/l1-l2-interoperability#l1-to-l2-gas-estimation-for-transactions

    // Limit on L2 gas to spend.
    uint256 public immutable L2_GAS_LIMIT; // typically 2_000_000

    // How much gas is required to publish a byte of data from L1 to L2. 800 is the required value
    // as set here https://github.com/matter-labs/era-contracts/blob/6391c0d7bf6184d7f6718060e3991ba6f0efe4a7/ethereum/contracts/zksync/facets/Mailbox.sol#L226
    // Note, this value can change and will require an updated adapter.
    uint256 public immutable L1_GAS_TO_L2_GAS_PER_PUB_DATA_LIMIT; // Typically 800

    // This address receives any remaining fee after an L1 to L2 transaction completes.
    // If refund recipient = address(0) then L2 msg.sender is used, unless msg.sender is a contract then its address
    // gets aliased.
    address public immutable L2_REFUND_ADDRESS;

    // L2 chain id
    uint256 public immutable CHAIN_ID;

    // BridgeHub address
    BridgeHubInterface public immutable BRIDGE_HUB;

    // Set l1Weth at construction time to make testing easier.
    WETH9Interface public immutable L1_WETH;

    // SharedBridge address, which is read from the BridgeHub at construction.
    address public immutable SHARED_BRIDGE;

    // Custom gas token address, which is read from the BridgeHub at construction.
    address public immutable CUSTOM_GAS_TOKEN;

    // Custom gas token funder
    FunderInterface public immutable CUSTOM_GAS_TOKEN_FUNDER;

    // The maximum gas price a transaction sent to this adapter may have. This is set to prevent a block producer from setting an artificially high priority fee
    // when calling a hub pool message relay, which would otherwise cause a large amount of the custom gas token to be sent to L2.
    uint256 private immutable MAX_TX_GASPRICE;

    event ZkStackMessageRelayed(bytes32 indexed canonicalTxHash);
    error ETHGasTokenNotAllowed();
    error TransactionFeeTooHigh();

    /**
     * @notice Constructs new Adapter.
     * @param _chainId The target ZkStack network's chain ID.
     * @param _bridgeHub The bridge hub contract address for the ZkStack network.
     * @param _l1Weth WETH address on L1.
     * @param _l2RefundAddress address that recieves excess gas refunds on L2.
     * @param _customGasTokenFunder Contract on L1 which funds bridge fees with amounts in the custom gas token.
     * @param _l2GasLimit The maximum amount of gas this contract is willing to pay to execute a transaction on L2.
     * @param _l1GasToL2GasPerPubDataLimit The exchange rate of l1 gas to l2 gas.
     * @param _maxTxGasprice The maximum effective gas price any transaction sent to this adapter may have.
     */
    constructor(
        uint256 _chainId,
        BridgeHubInterface _bridgeHub,
        WETH9Interface _l1Weth,
        address _l2RefundAddress,
        FunderInterface _customGasTokenFunder,
        uint256 _l2GasLimit,
        uint256 _l1GasToL2GasPerPubDataLimit,
        uint256 _maxTxGasprice
    ) {
        CHAIN_ID = _chainId;
        BRIDGE_HUB = _bridgeHub;
        L1_WETH = _l1Weth;
        L2_REFUND_ADDRESS = _l2RefundAddress;
        CUSTOM_GAS_TOKEN_FUNDER = _customGasTokenFunder;
        L2_GAS_LIMIT = _l2GasLimit;
        MAX_TX_GASPRICE = _maxTxGasprice;
        L1_GAS_TO_L2_GAS_PER_PUB_DATA_LIMIT = _l1GasToL2GasPerPubDataLimit;
        SHARED_BRIDGE = BRIDGE_HUB.sharedBridge();
        CUSTOM_GAS_TOKEN = BRIDGE_HUB.baseToken(CHAIN_ID);
        if (CUSTOM_GAS_TOKEN == ETH_TOKEN_ADDRESS) {
            revert ETHGasTokenNotAllowed();
        }
    }

    /**
     * @notice Send cross-chain message to target on ZkStack.
     * @dev The CUSTOM_GAS_TOKEN_FUNDER must hold enough of the gas token to pay for the L2 txn.
     * @param target Contract on L2 that will receive message.
     * @param message Data to send to target.
     */
    function relayMessage(address target, bytes memory message) external payable override {
        uint256 txBaseCost = _pullCustomGas(L2_GAS_LIMIT);
        IERC20(CUSTOM_GAS_TOKEN).forceApprove(SHARED_BRIDGE, txBaseCost);

        // Returns the hash of the requested L2 transaction. This hash can be used to follow the transaction status.
        bytes32 canonicalTxHash = BRIDGE_HUB.requestL2TransactionDirect(
            BridgeHubInterface.L2TransactionRequestDirect({
                chainId: CHAIN_ID,
                mintValue: txBaseCost,
                l2Contract: target,
                l2Value: 0,
                l2Calldata: message,
                l2GasLimit: L2_GAS_LIMIT,
                l2GasPerPubdataByteLimit: L1_GAS_TO_L2_GAS_PER_PUB_DATA_LIMIT,
                factoryDeps: new bytes[](0),
                refundRecipient: L2_REFUND_ADDRESS
            })
        );

        emit MessageRelayed(target, message);
        emit ZkStackMessageRelayed(canonicalTxHash);
    }

    /**
     * @notice Bridge tokens to ZkStack.
     * @dev The CUSTOM_GAS_TOKEN_FUNDER must hold enough of the gas token to pay for the L2 txn.
     * @param l1Token L1 token to deposit.
     * @param l2Token L2 token to receive.
     * @param amount Amount of L1 tokens to deposit and L2 tokens to receive.
     * @param to Bridge recipient.
     */
    function relayTokens(
        address l1Token,
        address l2Token, // l2Token is unused.
        uint256 amount,
        address to
    ) external payable override {
        // A bypass proxy seems to no longer be needed to avoid deposit limits. The tracking of these limits seems to be deprecated.
        // See: https://github.com/matter-labs/era-contracts/blob/bce4b2d0f34bd87f1aaadd291772935afb1c3bd6/l1-contracts/contracts/bridge/L1ERC20Bridge.sol#L54-L55
        uint256 txBaseCost = _pullCustomGas(L2_GAS_LIMIT);

        bytes32 txHash;
        if (l1Token == address(L1_WETH)) {
            // If the l1Token is WETH then unwrap it to ETH then send the ETH to the standard bridge along with the base
            // cost of custom gas tokens.
            L1_WETH.withdraw(amount);
            IERC20(CUSTOM_GAS_TOKEN).forceApprove(SHARED_BRIDGE, txBaseCost);
            // Note: When bridging ETH with `L2TransactionRequestTwoBridgesOuter`, the second bridge must be 0 for the shared bridge call to not revert.
            // https://github.com/matter-labs/era-contracts/blob/aafee035db892689df3f7afe4b89fd6467a39313/l1-contracts/contracts/bridge/L1SharedBridge.sol#L328
            txHash = BRIDGE_HUB.requestL2TransactionTwoBridges{ value: amount }(
                BridgeHubInterface.L2TransactionRequestTwoBridgesOuter({
                    chainId: CHAIN_ID,
                    mintValue: txBaseCost,
                    l2Value: 0,
                    l2GasLimit: L2_GAS_LIMIT,
                    l2GasPerPubdataByteLimit: L1_GAS_TO_L2_GAS_PER_PUB_DATA_LIMIT,
                    refundRecipient: L2_REFUND_ADDRESS,
                    secondBridgeAddress: SHARED_BRIDGE,
                    secondBridgeValue: amount,
                    secondBridgeCalldata: _secondBridgeCalldata(to, ETH_TOKEN_ADDRESS, 0)
                })
            );
        } else if (l1Token == CUSTOM_GAS_TOKEN) {
            // The chain's custom gas token.
            IERC20(l1Token).forceApprove(SHARED_BRIDGE, txBaseCost + amount);
            txHash = BRIDGE_HUB.requestL2TransactionDirect(
                BridgeHubInterface.L2TransactionRequestDirect({
                    chainId: CHAIN_ID,
                    mintValue: txBaseCost + amount,
                    l2Contract: to,
                    l2Value: amount,
                    l2Calldata: "",
                    l2GasLimit: L2_GAS_LIMIT,
                    l2GasPerPubdataByteLimit: L1_GAS_TO_L2_GAS_PER_PUB_DATA_LIMIT,
                    factoryDeps: new bytes[](0),
                    refundRecipient: L2_REFUND_ADDRESS
                })
            );
        } else {
            // An ERC20 that is not WETH and not the custom gas token.
            IERC20(CUSTOM_GAS_TOKEN).forceApprove(SHARED_BRIDGE, txBaseCost);
            IERC20(l1Token).forceApprove(SHARED_BRIDGE, amount);
            txHash = BRIDGE_HUB.requestL2TransactionTwoBridges(
                BridgeHubInterface.L2TransactionRequestTwoBridgesOuter({
                    chainId: CHAIN_ID,
                    mintValue: txBaseCost,
                    l2Value: 0,
                    l2GasLimit: L2_GAS_LIMIT,
                    l2GasPerPubdataByteLimit: L1_GAS_TO_L2_GAS_PER_PUB_DATA_LIMIT,
                    refundRecipient: L2_REFUND_ADDRESS,
                    secondBridgeAddress: SHARED_BRIDGE,
                    secondBridgeValue: 0,
                    secondBridgeCalldata: _secondBridgeCalldata(to, l1Token, amount)
                })
            );
        }

        emit TokensRelayed(l1Token, l2Token, amount, to);
        emit ZkStackMessageRelayed(txHash);
    }

    /**
     * @notice Computes the calldata for the "second bridge", which handles sending non native tokens.
     * @param l2Recipient recipient of the tokens.
     * @param l1Token the l1 address of the token. Note: ETH is encoded as address(1).
     * @param amount number of tokens to send.
     * @return abi encoded bytes.
     */
    function _secondBridgeCalldata(
        address l2Recipient,
        address l1Token,
        uint256 amount
    ) internal pure returns (bytes memory) {
        return abi.encode(l1Token, amount, l2Recipient);
    }

    /**
     * @notice For a given l2 gas limit, this computes the amount of tokens needed, pulls them from the funder, and
     * returns the amount.
     * @dev Should return a value in the same precision as the gas token's precision.
     * @param l2GasLimit L2 gas limit for the message.
     * @return amount of gas token that this contract needs to provide in order for the l2 transaction to succeed.
     */
    function _pullCustomGas(uint256 l2GasLimit) internal returns (uint256) {
        if (tx.gasprice > MAX_TX_GASPRICE) revert TransactionFeeTooHigh();
        uint256 cost = BRIDGE_HUB.l2TransactionBaseCost(
            CHAIN_ID,
            tx.gasprice,
            l2GasLimit,
            L1_GAS_TO_L2_GAS_PER_PUB_DATA_LIMIT
        );
        CUSTOM_GAS_TOKEN_FUNDER.withdraw(IERC20(CUSTOM_GAS_TOKEN), cost);

        return cost;
    }
}

// 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 IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * 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 IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

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

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/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;

    /**
     * @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(IERC20 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(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));
    }

    /**
     * @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(IERC20 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(IERC20 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(IERC20 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(
        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");
        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(IERC20 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))) && Address.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 Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * 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 Sends cross chain messages and tokens to contracts on a specific L2 network.
 * This interface is implemented by an adapter contract that is deployed on L1.
 */

interface AdapterInterface {
    event MessageRelayed(address target, bytes message);

    event TokensRelayed(address l1Token, address l2Token, uint256 amount, address to);

    /**
     * @notice Send message to `target` on L2.
     * @dev This method is marked payable because relaying the message might require a fee
     * to be paid by the sender to forward the message to L2. However, it will not send msg.value
     * to the target contract on L2.
     * @param target L2 address to send message to.
     * @param message Message to send to `target`.
     */
    function relayMessage(address target, bytes calldata message) external payable;

    /**
     * @notice Send `amount` of `l1Token` to `to` on L2. `l2Token` is the L2 address equivalent of `l1Token`.
     * @dev This method is marked payable because relaying the message might require a fee
     * to be paid by the sender to forward the message to L2. However, it will not send msg.value
     * to the target contract on L2.
     * @param l1Token L1 token to bridge.
     * @param l2Token L2 token to receive.
     * @param amount Amount of `l1Token` to bridge.
     * @param to Bridge recipient.
     */
    function relayTokens(
        address l1Token,
        address l2Token,
        uint256 amount,
        address to
    ) external payable;
}

// 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 BridgeHubInterface
 * @notice This interface is shared between ZkStack adapters. It is the main interaction point for bridging to ZkStack chains.
 */
interface BridgeHubInterface {
    struct L2TransactionRequestDirect {
        uint256 chainId;
        uint256 mintValue;
        address l2Contract;
        uint256 l2Value;
        bytes l2Calldata;
        uint256 l2GasLimit;
        uint256 l2GasPerPubdataByteLimit;
        bytes[] factoryDeps;
        address refundRecipient;
    }

    /**
     * @notice the mailbox is called directly after the sharedBridge received the deposit.
     * This assumes that either ether is the base token or the msg.sender has approved mintValue allowance for the
     * sharedBridge. This means this is not ideal for contract calls, as the contract would have to handle token
     * allowance of the base Token.
     * @param _request the direct request.
     */
    function requestL2TransactionDirect(L2TransactionRequestDirect calldata _request)
        external
        payable
        returns (bytes32 canonicalTxHash);

    struct L2TransactionRequestTwoBridgesOuter {
        uint256 chainId;
        uint256 mintValue;
        uint256 l2Value;
        uint256 l2GasLimit;
        uint256 l2GasPerPubdataByteLimit;
        address refundRecipient;
        address secondBridgeAddress;
        uint256 secondBridgeValue;
        bytes secondBridgeCalldata;
    }

    /**
     * @notice After depositing funds to the sharedBridge, the secondBridge is called to return the actual L2 message
     * which is sent to the Mailbox. This assumes that either ether is the base token or the msg.sender has approved
     * the sharedBridge with the mintValue, and also the necessary approvals are given for the second bridge. The logic
     * of this bridge is to allow easy depositing for bridges. Each contract that handles the users ERC20 tokens needs
     * approvals from the user, this contract allows the user to approve for each token only its respective bridge.
     * This function is great for contract calls to L2, the secondBridge can be any contract.
     * @param _request the two bridges request.
     */
    function requestL2TransactionTwoBridges(L2TransactionRequestTwoBridgesOuter calldata _request)
        external
        payable
        returns (bytes32 canonicalTxHash);

    /**
     * @notice Gets the shared bridge.
     * @dev The shared bridge manages ERC20 tokens.
     */
    function sharedBridge() external view returns (address);

    /**
     * @notice Gets the base token for a chain.
     * @dev Base token == native token.
     */
    function baseToken(uint256 _chainId) external view returns (address);

    /**
     * @notice Computes the base transaction cost for a transaction.
     * @param _chainId the chain the transaction is being sent to.
     * @param _gasPrice the l1 gas price at time of execution.
     * @param _l2GasLimit the gas limit for the l2 transaction.
     * @param _l2GasPerPubdataByteLimit configuration value that changes infrequently.
     */
    function l2TransactionBaseCost(
        uint256 _chainId,
        uint256 _gasPrice,
        uint256 _l2GasLimit,
        uint256 _l2GasPerPubdataByteLimit
    ) external view returns (uint256);
}

{
  "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":"uint256","name":"_chainId","type":"uint256"},{"internalType":"contract BridgeHubInterface","name":"_bridgeHub","type":"address"},{"internalType":"contract WETH9Interface","name":"_l1Weth","type":"address"},{"internalType":"address","name":"_l2RefundAddress","type":"address"},{"internalType":"contract FunderInterface","name":"_customGasTokenFunder","type":"address"},{"internalType":"uint256","name":"_l2GasLimit","type":"uint256"},{"internalType":"uint256","name":"_l1GasToL2GasPerPubDataLimit","type":"uint256"},{"internalType":"uint256","name":"_maxTxGasprice","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ETHGasTokenNotAllowed","type":"error"},{"inputs":[],"name":"TransactionFeeTooHigh","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"target","type":"address"},{"indexed":false,"internalType":"bytes","name":"message","type":"bytes"}],"name":"MessageRelayed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"l1Token","type":"address"},{"indexed":false,"internalType":"address","name":"l2Token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"to","type":"address"}],"name":"TokensRelayed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"canonicalTxHash","type":"bytes32"}],"name":"ZkStackMessageRelayed","type":"event"},{"inputs":[],"name":"BRIDGE_HUB","outputs":[{"internalType":"contract BridgeHubInterface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"CHAIN_ID","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"CUSTOM_GAS_TOKEN","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"CUSTOM_GAS_TOKEN_FUNDER","outputs":[{"internalType":"contract FunderInterface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"L1_GAS_TO_L2_GAS_PER_PUB_DATA_LIMIT","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"L1_WETH","outputs":[{"internalType":"contract WETH9Interface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"L2_GAS_LIMIT","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"L2_REFUND_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"SHARED_BRIDGE","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"message","type":"bytes"}],"name":"relayMessage","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"l1Token","type":"address"},{"internalType":"address","name":"l2Token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"relayTokens","outputs":[],"stateMutability":"payable","type":"function"}]

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

-----Decoded View---------------
Arg [0] : _chainId (uint256): 37111
Arg [1] : _bridgeHub (address): 0x236D1c3Ff32Bd0Ca26b72Af287E895627c0478cE
Arg [2] : _l1Weth (address): 0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14
Arg [3] : _l2RefundAddress (address): 0x07aE8551Be970cB1cCa11Dd7a11F47Ae82e70E67
Arg [4] : _customGasTokenFunder (address): 0x74f00724075443Cbbf55129F17CbAB0F77bA0722
Arg [5] : _l2GasLimit (uint256): 2000000
Arg [6] : _l1GasToL2GasPerPubDataLimit (uint256): 800
Arg [7] : _maxTxGasprice (uint256): 10000000000000

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000090f7
Arg [1] : 000000000000000000000000236d1c3ff32bd0ca26b72af287e895627c0478ce
Arg [2] : 000000000000000000000000fff9976782d46cc05630d1f6ebab18b2324d6b14
Arg [3] : 00000000000000000000000007ae8551be970cb1cca11dd7a11f47ae82e70e67
Arg [4] : 00000000000000000000000074f00724075443cbbf55129f17cbab0f77ba0722
Arg [5] : 00000000000000000000000000000000000000000000000000000000001e8480
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000320
Arg [7] : 000000000000000000000000000000000000000000000000000009184e72a000