// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

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

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

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.24;

interface IBridgeMiddleware {
    function bridgehub() external view returns (address);
    function bridge(
        address _l2Receiver,
        address _token,
        uint256 _amount,
        uint256 _l2GasLimit,
        uint256 _l2GasPerPubdataByteLimit,
        address _refundRecipient
    ) external payable returns (bytes32 canonicalTxHash);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";

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

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

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

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.24;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

interface IYbEth is IERC20Metadata {
    function stake(address receiver) external payable returns (uint256);
    function token2UnbondRequest(uint256 tokenId)
        external
        view
        returns (
            uint128 unlockStartTime,
            uint128 unlockEndTime,
            uint256 shareAmount,
            uint256 exchangeRate,
            uint256 batchNo
        );
    function EXCHANGE_RATE_DECIMAL() external view returns (uint8);
}

// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.8.24;

library LibErrors {
    /// @notice Indicates that the given address is zero
    error InvalidZeroAddress();

    /// @notice Indicates that the given value is zero
    error InvalidNullValue();

    /// @notice Indicates that the given string is empty
    error InvalidEmptyString();

    /// @notice Indicates a failed ETH transfer call
    error FailedTransfer();

    /// @notice Indicates the length of two arrays not the same
    error ArraysNotSameLength();
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.24;

import "./LibErrors.sol";

/// @title Lib Sanitize
/// @dev This library helps sanitizing inputs.
library LibSanitize {
    /// @dev Internal utility to sanitize an address and ensure its value is not 0.
    /// @param addressValue The address to verify
    function notZeroAddress(address addressValue) internal pure {
        if (addressValue == address(0)) {
            revert LibErrors.InvalidZeroAddress();
        }
    }

    /// @dev Internal utility to sanitize an uint256 value and ensure its value is not 0.
    /// @param value The value to verify
    function notNullValue(uint256 value) internal pure {
        if (value == 0) {
            revert LibErrors.InvalidNullValue();
        }
    }

    /// @dev Internal utility to sanitize a string value and ensure it's not empty.
    /// @param stringValue The string value to verify
    function notEmptyString(string memory stringValue) internal pure {
        if (bytes(stringValue).length == 0) {
            revert LibErrors.InvalidEmptyString();
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    bool private _paused;

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

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

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

    uint256 private _status;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    constructor() {
        _status = NOT_ENTERED;
    }

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

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

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

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

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == ENTERED;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.24;

import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {Pausable} from "@openzeppelin/contracts/utils/Pausable.sol";

import {IYbEth} from "./interfaces/IYbEth.sol";
import {IBridgeMiddleware} from "./interfaces/IBridgeMiddleware.sol";
import {LibSanitize} from "./libs/LibSanitize.sol";

contract YbEthBridge is Ownable, Pausable, ReentrancyGuard {
    /// @dev Indicates that the ETH value is insufficient
    error InsufficientEthValue();

    // @dev Emitted when MintAndBridge L1 tx success. This not mean that the conterpart L2 tx will success
    //  `canonicalTxHash` is the L2 tx hash, which can be used to check if the L2 tx is processed successfully.
    event MintAndBridge(address indexed sender, address indexed l2Recevier, uint256 amount, bytes32 canonicalTxHash);

    IYbEth public ybEth;
    IBridgeMiddleware public bridgeMiddleware;

    /// @param _ybEth the ybEth address
    /// @param _bridgeMiddleware the bridgeMiddleware address
    constructor(address _ybEth, address _bridgeMiddleware) Ownable(msg.sender) {
        LibSanitize.notZeroAddress(_ybEth);
        LibSanitize.notZeroAddress(_bridgeMiddleware);

        ybEth = IYbEth(_ybEth);
        bridgeMiddleware = IBridgeMiddleware(_bridgeMiddleware);
    }

    /// @dev Pause the contract
    function pause() external onlyOwner {
        return _pause();
    }

    /// @dev Unpause the contract
    function unpause() external onlyOwner {
        return _unpause();
    }

    /// Deposite ETH to mint ybETH and bridge them to L2 within the same transaction
    ///
    /// @param _l2Receiver The receiver that will receive the minted tokens on L2
    /// @param _amount The amount of ETH to stake to the ybEth contract
    /// @param _l2GasLimit The estimated gas limit of the L2 tx
    /// @return canonicalTxHash The canonical L2 tx hash, which can be used to track the L2 tx status.
    function mintAndBridge(
        address _l2Receiver,
        uint256 _amount,
        uint256 _l2GasLimit,
        uint256 _l2GasPerPubdataByteLimit,
        address _refundRecipient
    ) external payable whenNotPaused nonReentrant returns (bytes32 canonicalTxHash) {
        LibSanitize.notZeroAddress(_l2Receiver);
        LibSanitize.notNullValue(_amount);
        LibSanitize.notNullValue(_l2GasLimit);
        LibSanitize.notNullValue(_l2GasPerPubdataByteLimit);
        LibSanitize.notZeroAddress(_refundRecipient);

        if (msg.value <= _amount) {
            revert InsufficientEthValue();
        }

        // Mint ybETH token to this contract by staking ETH to the YbEth contract
        uint256 ybEthAmount = ybEth.stake{value: _amount}(address(this));
        // Approve the bridgeMiddleware to transfer the ybETH from this contract
        ybEth.approve(address(bridgeMiddleware), ybEthAmount);

        // The remaining ETH value is used for paying the L2 tx gas fee
        uint256 l2GasFeeInEth = msg.value - _amount;

        // Bridge the minted ybETH to L2
        canonicalTxHash = bridgeMiddleware.bridge{value: l2GasFeeInEth}(
            _l2Receiver, address(ybEth), ybEthAmount, _l2GasLimit, _l2GasPerPubdataByteLimit, _refundRecipient
        );

        emit MintAndBridge(msg.sender, _l2Receiver, ybEthAmount, canonicalTxHash);
    }
}

{
  "compilationTarget": {
    "src/YbEthBridge.sol": "YbEthBridge"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "details": {
      "constantOptimizer": true,
      "cse": true,
      "deduplicate": true,
      "inliner": true,
      "jumpdestRemover": true,
      "orderLiterals": true,
      "peephole": true,
      "simpleCounterForLoopUncheckedIncrement": true,
      "yul": false
    },
    "runs": 200
  },
  "remappings": []
}