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

import "../common/EssentialContract.sol";
import "./libs/LibProposing.sol";
import "./libs/LibProving.sol";
import "./libs/LibVerifying.sol";
import "./ITaikoL1.sol";
import "./TaikoErrors.sol";
import "./TaikoEvents.sol";

/// @title TaikoL1
/// @notice This contract serves as the "base layer contract" of the Taiko protocol, providing
/// functionalities for proposing, proving, and verifying blocks. The term "base layer contract"
/// means that although this is usually deployed on L1, it can also be deployed on L2s to create
/// L3 "inception layers". The contract also handles the deposit and withdrawal of Taiko tokens
/// and Ether. Additionally, this contract doesn't hold any Ether. Ether deposited to L2 are held
/// by the Bridge contract.
/// @dev Labeled in AddressResolver as "taiko"
/// @custom:security-contact [email protected]
contract TaikoL1 is EssentialContract, ITaikoL1, TaikoEvents, TaikoErrors {
    /// @notice The TaikoL1 state.
    TaikoData.State public state;

    uint256[50] private __gap;

    modifier whenProvingNotPaused() {
        if (state.slotB.provingPaused) revert L1_PROVING_PAUSED();
        _;
    }

    modifier emitEventForClient() {
        _;
        LibVerifying.emitEventForClient(state);
    }

    /// @dev Allows for receiving Ether from Hooks
    receive() external payable {
        if (!_inNonReentrant()) revert L1_RECEIVE_DISABLED();
    }

    /// @notice Initializes the contract.
    /// @param _owner The owner of this contract. msg.sender will be used if this value is zero.
    /// @param _addressManager The address of the {AddressManager} contract.
    /// @param _genesisBlockHash The block hash of the genesis block.
    /// @param _toPause true to pause the contract by default.
    function init(
        address _owner,
        address _addressManager,
        bytes32 _genesisBlockHash,
        bool _toPause
    )
        external
        initializer
    {
        __Essential_init(_owner, _addressManager);
        LibVerifying.init(state, getConfig(), _genesisBlockHash);
        if (_toPause) _pause();
    }

    function init2() external onlyOwner reinitializer(2) {
        // reset some previously used slots for future reuse
        state.slotB.__reservedB1 = 0;
        state.slotB.__reservedB2 = 0;
        state.slotB.__reservedB3 = 0;
        state.__reserve1 = 0;
    }

    /// @inheritdoc ITaikoL1
    function proposeBlock(
        bytes calldata _params,
        bytes calldata _txList
    )
        external
        payable
        whenNotPaused
        nonReentrant
        emitEventForClient
        returns (TaikoData.BlockMetadata memory meta_, TaikoData.EthDeposit[] memory deposits_)
    {
        TaikoData.Config memory config = getConfig();
        (meta_, deposits_) = LibProposing.proposeBlock(
            state, config, this, _params, _txList, _checkEOAForCalldataDA()
        );

        if (!state.slotB.provingPaused) {
            LibVerifying.verifyBlocks(state, config, this, config.maxBlocksToVerifyPerProposal);
        }
    }

    /// @inheritdoc ITaikoL1
    function proveBlock(
        uint64 _blockId,
        bytes calldata _input
    )
        external
        whenNotPaused
        whenProvingNotPaused
        nonReentrant
        emitEventForClient
    {
        (
            TaikoData.BlockMetadata memory meta,
            TaikoData.Transition memory tran,
            TaikoData.TierProof memory proof
        ) = abi.decode(_input, (TaikoData.BlockMetadata, TaikoData.Transition, TaikoData.TierProof));

        if (_blockId != meta.id) revert L1_INVALID_BLOCK_ID();

        TaikoData.Config memory config = getConfig();

        uint8 maxBlocksToVerify = LibProving.proveBlock(state, config, this, meta, tran, proof);

        LibVerifying.verifyBlocks(state, config, this, maxBlocksToVerify);
    }

    /// @inheritdoc ITaikoL1
    function verifyBlocks(uint64 _maxBlocksToVerify)
        external
        whenNotPaused
        whenProvingNotPaused
        nonReentrant
        emitEventForClient
    {
        LibVerifying.verifyBlocks(state, getConfig(), this, _maxBlocksToVerify);
    }

    /// @notice Pause block proving.
    /// @param _pause True if paused.
    function pauseProving(bool _pause) external {
        _authorizePause(msg.sender, _pause);
        LibProving.pauseProving(state, _pause);
    }

    /// @inheritdoc EssentialContract
    function unpause() public override {
        super.unpause(); // permission checked inside
        state.slotB.lastUnpausedAt = uint64(block.timestamp);
    }

    /// @notice Gets the details of a block.
    /// @param _blockId Index of the block.
    /// @return blk_ The block.
    function getBlock(uint64 _blockId) public view returns (TaikoData.Block memory blk_) {
        (blk_,) = LibUtils.getBlock(state, getConfig(), _blockId);
    }

    /// @notice Gets the state transition for a specific block.
    /// @param _blockId Index of the block.
    /// @param _parentHash Parent hash of the block.
    /// @return The state transition data of the block.
    function getTransition(
        uint64 _blockId,
        bytes32 _parentHash
    )
        public
        view
        returns (TaikoData.TransitionState memory)
    {
        return LibUtils.getTransition(state, getConfig(), _blockId, _parentHash);
    }

    /// @notice Gets the state transition for a specific block.
    /// @param _blockId Index of the block.
    /// @param _tid The transition id.
    /// @return The state transition data of the block.
    function getTransition(
        uint64 _blockId,
        uint32 _tid
    )
        public
        view
        returns (TaikoData.TransitionState memory)
    {
        return LibUtils.getTransition(state, getConfig(), _blockId, _tid);
    }
    /// @notice Gets the state variables of the TaikoL1 contract.
    /// @dev This method can be deleted once node/client stops using it.
    /// @return State variables stored at SlotA.
    /// @return State variables stored at SlotB.

    function getStateVariables()
        public
        view
        returns (TaikoData.SlotA memory, TaikoData.SlotB memory)
    {
        return (state.slotA, state.slotB);
    }

    /// @notice Gets SlotA
    /// @return  State variables stored at SlotA.
    function slotA() public view returns (TaikoData.SlotA memory) {
        return state.slotA;
    }

    /// @notice Gets SlotB
    /// @return  State variables stored at SlotB.
    function slotB() public view returns (TaikoData.SlotB memory) {
        return state.slotB;
    }

    /// @inheritdoc ITaikoL1
    function getConfig() public view virtual override returns (TaikoData.Config memory) {
        // All hard-coded configurations:
        // - treasury: the actual TaikoL2 address.
        // - anchorGasLimit: 250_000 (based on internal devnet, its ~220_000
        // after 256 L2 blocks)
        return TaikoData.Config({
            chainId: LibNetwork.TAIKO,
            // Assume the block time is 3s, the protocol will allow ~90 days of
            // new blocks without any verification.
            blockMaxProposals: 3_000_000,
            blockRingBufferSize: 3_010_000,
            // Can be overridden by the tier config.
            maxBlocksToVerifyPerProposal: 10,
            // This value is set based on `gasTargetPerL1Block = 15_000_000 * 4` in TaikoL2.
            // We use 8x rather than 4x here to handle the scenario where the average number of
            // Taiko blocks proposed per Ethereum block is smaller than 1.
            blockMaxGasLimit: 240_000_000,
            livenessBond: 250e18, // 250 Taiko token
            blockSyncThreshold: 16
        });
    }

    /// @dev chain_pauser is supposed to be a cold wallet.
    function _authorizePause(
        address,
        bool
    )
        internal
        view
        virtual
        override
        onlyFromOwnerOrNamed(LibStrings.B_CHAIN_WATCHDOG)
    { }

    function _checkEOAForCalldataDA() internal pure virtual returns (bool) {
        return true;
    }
}

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

import "@openzeppelin/contracts/proxy/utils/UUPSUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";
import "./AddressResolver.sol";
import "../libs/LibNetwork.sol";

/// @title EssentialContract
/// @custom:security-contact [email protected]
abstract contract EssentialContract is UUPSUpgradeable, Ownable2StepUpgradeable, AddressResolver {
    uint8 private constant _FALSE = 1;

    uint8 private constant _TRUE = 2;

    /// @dev The slot in transient storage of the reentry lock.
    /// This is the result of keccak256("ownerUUPS.reentry_slot") plus 1. The addition aims to
    /// prevent hash collisions with slots defined in EIP-1967, where slots are derived by
    /// keccak256("something") - 1, and with slots in SignalService, calculated directly with
    /// keccak256("something").
    bytes32 private constant _REENTRY_SLOT =
        0xa5054f728453d3dbe953bdc43e4d0cb97e662ea32d7958190f3dc2da31d9721b;

    /// @dev Slot 1.
    uint8 private __reentry;
    uint8 private __paused;
    uint64 public lastUnpausedAt;

    uint256[49] private __gap;

    /// @notice Emitted when the contract is paused.
    /// @param account The account that paused the contract.
    event Paused(address account);

    /// @notice Emitted when the contract is unpaused.
    /// @param account The account that unpaused the contract.
    event Unpaused(address account);

    error REENTRANT_CALL();
    error INVALID_PAUSE_STATUS();
    error ZERO_ADDR_MANAGER();

    /// @dev Modifier that ensures the caller is the owner or resolved address of a given name.
    /// @param _name The name to check against.
    modifier onlyFromOwnerOrNamed(bytes32 _name) {
        if (msg.sender != owner() && msg.sender != resolve(_name, true)) revert RESOLVER_DENIED();
        _;
    }

    modifier nonReentrant() {
        if (_loadReentryLock() == _TRUE) revert REENTRANT_CALL();
        _storeReentryLock(_TRUE);
        _;
        _storeReentryLock(_FALSE);
    }

    modifier whenPaused() {
        if (!paused()) revert INVALID_PAUSE_STATUS();
        _;
    }

    modifier whenNotPaused() {
        if (paused()) revert INVALID_PAUSE_STATUS();
        _;
    }

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() {
        _disableInitializers();
    }

    /// @notice Pauses the contract.
    function pause() public virtual {
        _pause();
        // We call the authorize function here to avoid:
        // Warning (5740): Unreachable code.
        _authorizePause(msg.sender, true);
    }

    /// @notice Unpauses the contract.
    function unpause() public virtual {
        _unpause();
        // We call the authorize function here to avoid:
        // Warning (5740): Unreachable code.
        _authorizePause(msg.sender, false);
    }

    /// @notice Returns true if the contract is paused, and false otherwise.
    /// @return true if paused, false otherwise.
    function paused() public view returns (bool) {
        return __paused == _TRUE;
    }

    /// @notice Initializes the contract.
    /// @param _owner The owner of this contract. msg.sender will be used if this value is zero.
    /// @param _addressManager The address of the {AddressManager} contract.
    function __Essential_init(address _owner, address _addressManager) internal onlyInitializing {
        if (_addressManager == address(0)) revert ZERO_ADDR_MANAGER();
        __Essential_init(_owner);
        __AddressResolver_init(_addressManager);
    }

    function __Essential_init(address _owner) internal virtual {
        _transferOwnership(_owner == address(0) ? msg.sender : _owner);
        __paused = _FALSE;
    }

    function _pause() internal whenNotPaused {
        __paused = _TRUE;
        emit Paused(msg.sender);
    }

    function _unpause() internal whenPaused {
        __paused = _FALSE;
        lastUnpausedAt = uint64(block.timestamp);
        emit Unpaused(msg.sender);
    }

    function _authorizeUpgrade(address) internal virtual override onlyOwner { }

    function _authorizePause(address, bool) internal virtual onlyOwner { }

    // Stores the reentry lock
    function _storeReentryLock(uint8 _reentry) internal virtual {
        if (LibNetwork.isDencunSupported(block.chainid)) {
            assembly {
                tstore(_REENTRY_SLOT, _reentry)
            }
        } else {
            __reentry = _reentry;
        }
    }

    // Loads the reentry lock
    function _loadReentryLock() internal view virtual returns (uint8 reentry_) {
        if (LibNetwork.isDencunSupported(block.chainid)) {
            assembly {
                reentry_ := tload(_REENTRY_SLOT)
            }
        } else {
            reentry_ = __reentry;
        }
    }

    function _inNonReentrant() internal view returns (bool) {
        return _loadReentryLock() == _TRUE;
    }
}

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

import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../../common/IAddressResolver.sol";
import "../../common/LibStrings.sol";
import "../../libs/LibAddress.sol";
import "../../libs/LibNetwork.sol";
import "../hooks/IHook.sol";
import "../tiers/ITierProvider.sol";

/// @title LibProposing
/// @notice A library for handling block proposals in the Taiko protocol.
/// @custom:security-contact [email protected]
library LibProposing {
    using LibAddress for address;

    // = keccak256(abi.encode(new TaikoData.EthDeposit[](0)))
    bytes32 private constant _EMPTY_ETH_DEPOSIT_HASH =
        0x569e75fc77c1a856f6daaf9e69d8a9566ca34aa47f9133711ce065a571af0cfd;

    // Warning: Any events defined here must also be defined in TaikoEvents.sol.
    /// @notice Emitted when a block is proposed.
    /// @param blockId The ID of the proposed block.
    /// @param assignedProver The address of the assigned prover.
    /// @param livenessBond The liveness bond of the proposed block.
    /// @param meta The metadata of the proposed block.
    /// @param depositsProcessed The EthDeposit array about processed deposits in this proposed
    /// block.
    event BlockProposed(
        uint256 indexed blockId,
        address indexed assignedProver,
        uint96 livenessBond,
        TaikoData.BlockMetadata meta,
        TaikoData.EthDeposit[] depositsProcessed
    );

    // Warning: Any errors defined here must also be defined in TaikoErrors.sol.
    error L1_BLOB_NOT_AVAILABLE();
    error L1_BLOB_NOT_FOUND();
    error L1_INVALID_HOOK();
    error L1_INVALID_PROVER();
    error L1_INVALID_SIG();
    error L1_LIVENESS_BOND_NOT_RECEIVED();
    error L1_TOO_MANY_BLOCKS();
    error L1_UNAUTHORIZED();
    error L1_UNEXPECTED_PARENT();

    /// @dev Proposes a Taiko L2 block.
    /// @param _state Current TaikoData.State.
    /// @param _config Actual TaikoData.Config.
    /// @param _resolver Address resolver interface.
    /// @param _data Encoded data bytes containing the block params.
    /// @param _txList Transaction list bytes (if not blob).
    /// @return meta_ The constructed block's metadata.
    function proposeBlock(
        TaikoData.State storage _state,
        TaikoData.Config memory _config,
        IAddressResolver _resolver,
        bytes calldata _data,
        bytes calldata _txList,
        bool _checkEOAForCalldataDA
    )
        internal
        returns (TaikoData.BlockMetadata memory meta_, TaikoData.EthDeposit[] memory deposits_)
    {
        TaikoData.BlockParams memory params = abi.decode(_data, (TaikoData.BlockParams));

        // We need a prover that will submit proofs after the block has been submitted
        if (params.assignedProver == address(0)) {
            revert L1_INVALID_PROVER();
        }

        if (params.coinbase == address(0)) {
            params.coinbase = msg.sender;
        }

        // Taiko, as a Based Rollup, enables permissionless block proposals.
        // However, if the "proposer" address is set to a non-zero value, we
        // ensure that only that specific address has the authority to propose
        // blocks.
        TaikoData.SlotB memory b = _state.slotB;
        if (!_isProposerPermitted(b, _resolver)) revert L1_UNAUTHORIZED();

        // It's essential to ensure that the ring buffer for proposed blocks
        // still has space for at least one more block.
        if (b.numBlocks >= b.lastVerifiedBlockId + _config.blockMaxProposals + 1) {
            revert L1_TOO_MANY_BLOCKS();
        }

        bytes32 parentMetaHash =
            _state.blocks[(b.numBlocks - 1) % _config.blockRingBufferSize].metaHash;
        // assert(parentMetaHash != 0);

        // Check if parent block has the right meta hash. This is to allow the proposer to make sure
        // the block builds on the expected latest chain state.
        if (params.parentMetaHash != 0 && parentMetaHash != params.parentMetaHash) {
            revert L1_UNEXPECTED_PARENT();
        }

        // Initialize metadata to compute a metaHash, which forms a part of
        // the block data to be stored on-chain for future integrity checks.
        // If we choose to persist all data fields in the metadata, it will
        // require additional storage slots.
        unchecked {
            meta_ = TaikoData.BlockMetadata({
                l1Hash: blockhash(block.number - 1),
                difficulty: 0, // to be initialized below
                blobHash: 0, // to be initialized below
                extraData: params.extraData,
                depositsHash: _EMPTY_ETH_DEPOSIT_HASH,
                coinbase: params.coinbase,
                id: b.numBlocks,
                gasLimit: _config.blockMaxGasLimit,
                timestamp: uint64(block.timestamp),
                l1Height: uint64(block.number - 1),
                minTier: 0, // to be initialized below
                blobUsed: _txList.length == 0,
                parentMetaHash: parentMetaHash,
                sender: msg.sender
            });
        }

        // Update certain meta fields
        if (meta_.blobUsed) {
            if (!LibNetwork.isDencunSupported(block.chainid)) revert L1_BLOB_NOT_AVAILABLE();

            // Always use the first blob in this transaction. If the
            // proposeBlock functions are called more than once in the same
            // L1 transaction, these multiple L2 blocks will share the same
            // blob.
            meta_.blobHash = blobhash(0);
            if (meta_.blobHash == 0) revert L1_BLOB_NOT_FOUND();
        } else {
            meta_.blobHash = keccak256(_txList);

            // This function must be called as the outmost transaction (not an internal one) for
            // the node to extract the calldata easily.
            // We cannot rely on `msg.sender != tx.origin` for EOA check, as it will break after EIP
            // 7645: Alias ORIGIN to SENDER
            if (
                _checkEOAForCalldataDA && meta_.id != 1
                    && ECDSA.recover(meta_.blobHash, params.signature) != msg.sender
            ) {
                revert L1_INVALID_SIG();
            }
        }

        // Following the Merge, the L1 mixHash incorporates the
        // prevrandao value from the beacon chain. Given the possibility
        // of multiple Taiko blocks being proposed within a single
        // Ethereum block, we choose to introduce a salt to this random
        // number as the L2 mixHash.
        meta_.difficulty = keccak256(abi.encodePacked(block.prevrandao, b.numBlocks, block.number));

        // Use the difficulty as a random number
        meta_.minTier = ITierProvider(_resolver.resolve(LibStrings.B_TIER_PROVIDER, false))
            .getMinTier(uint256(meta_.difficulty));

        // Create the block that will be stored onchain
        TaikoData.Block memory blk = TaikoData.Block({
            metaHash: keccak256(abi.encode(meta_)),
            // Safeguard the liveness bond to ensure its preservation,
            // particularly in scenarios where it might be altered after the
            // block's proposal but before it has been proven or verified.
            livenessBond: _config.livenessBond,
            blockId: b.numBlocks,
            proposedAt: meta_.timestamp,
            proposedIn: uint64(block.number),
            // For a new block, the next transition ID is always 1, not 0.
            nextTransitionId: 1,
            // For unverified block, its verifiedTransitionId is always 0.
            verifiedTransitionId: 0,
            assignedProver: params.assignedProver
        });

        // Store the block in the ring buffer
        _state.blocks[b.numBlocks % _config.blockRingBufferSize] = blk;

        // Increment the counter (cursor) by 1.
        unchecked {
            ++_state.slotB.numBlocks;
        }

        {
            IERC20 tko = IERC20(_resolver.resolve(LibStrings.B_TAIKO_TOKEN, false));
            uint256 tkoBalance = tko.balanceOf(address(this));

            // Run all hooks.
            // Note that address(this).balance has been updated with msg.value,
            // prior to any code in this function has been executed.
            address prevHook;
            for (uint256 i; i < params.hookCalls.length; ++i) {
                if (uint160(prevHook) >= uint160(params.hookCalls[i].hook)) {
                    revert L1_INVALID_HOOK();
                }

                // When a hook is called, all ether in this contract will be sent to the hook.
                // If the ether sent to the hook is not used entirely, the hook shall send the Ether
                // back to this contract for the next hook to use.
                // Proposers shall choose to use extra hooks wisely.
                IHook(params.hookCalls[i].hook).onBlockProposed{ value: address(this).balance }(
                    blk, meta_, params.hookCalls[i].data
                );

                prevHook = params.hookCalls[i].hook;
            }
            // Refund Ether
            if (address(this).balance != 0) {
                msg.sender.sendEtherAndVerify(address(this).balance);
            }

            // Check that after hooks, the Taiko Token balance of this contract
            // have increased by the same amount as _config.livenessBond (to prevent)
            // multiple draining payments by a malicious proposer nesting the same
            // hook.
            if (tko.balanceOf(address(this)) != tkoBalance + _config.livenessBond) {
                revert L1_LIVENESS_BOND_NOT_RECEIVED();
            }
        }

        deposits_ = new TaikoData.EthDeposit[](0);
        emit BlockProposed({
            blockId: blk.blockId,
            assignedProver: blk.assignedProver,
            livenessBond: _config.livenessBond,
            meta: meta_,
            depositsProcessed: deposits_
        });
    }

    function _isProposerPermitted(
        TaikoData.SlotB memory _slotB,
        IAddressResolver _resolver
    )
        private
        view
        returns (bool)
    {
        if (_slotB.numBlocks == 1) {
            // Only proposer_one can propose the first block after genesis
            address proposerOne = _resolver.resolve(LibStrings.B_PROPOSER_ONE, true);
            if (proposerOne != address(0)) {
                return msg.sender == proposerOne;
            }
        }

        address proposer = _resolver.resolve(LibStrings.B_PROPOSER, true);
        return proposer == address(0) || msg.sender == proposer;
    }
}

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

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../../common/IAddressResolver.sol";
import "../../common/LibStrings.sol";
import "../../verifiers/IVerifier.sol";
import "../tiers/ITierProvider.sol";
import "./LibUtils.sol";

/// @title LibProving
/// @notice A library for handling block contestation and proving in the Taiko
/// protocol.
/// @custom:security-contact [email protected]
library LibProving {
    using LibMath for uint256;
    using SafeERC20 for IERC20;

    // A struct to get around stack too deep issue and to cache state variables for multiple reads.
    struct Local {
        TaikoData.SlotB b;
        ITierProvider.Tier tier;
        bytes32 metaHash;
        address assignedProver;
        uint96 livenessBond;
        uint64 slot;
        uint64 blockId;
        uint32 tid;
        bool lastUnpausedAt;
        bool isTopTier;
        bool inProvingWindow;
        bool sameTransition;
    }

    // Warning: Any events defined here must also be defined in TaikoEvents.sol.
    /// @notice Emitted when a transition is proved.
    /// @param blockId The block ID.
    /// @param tran The transition data.
    /// @param prover The prover's address.
    /// @param validityBond The validity bond amount.
    /// @param tier The tier of the proof.
    event TransitionProved(
        uint256 indexed blockId,
        TaikoData.Transition tran,
        address prover,
        uint96 validityBond,
        uint16 tier
    );

    /// @notice Emitted when a transition is contested.
    /// @param blockId The block ID.
    /// @param tran The transition data.
    /// @param contester The contester's address.
    /// @param contestBond The contest bond amount.
    /// @param tier The tier of the proof.
    event TransitionContested(
        uint256 indexed blockId,
        TaikoData.Transition tran,
        address contester,
        uint96 contestBond,
        uint16 tier
    );

    /// @notice Emitted when proving is paused or unpaused.
    /// @param paused The pause status.
    event ProvingPaused(bool paused);

    // Warning: Any errors defined here must also be defined in TaikoErrors.sol.
    error L1_ALREADY_CONTESTED();
    error L1_ALREADY_PROVED();
    error L1_BLOCK_MISMATCH();
    error L1_CANNOT_CONTEST();
    error L1_INVALID_BLOCK_ID();
    error L1_INVALID_PAUSE_STATUS();
    error L1_INVALID_TIER();
    error L1_INVALID_TRANSITION();
    error L1_NOT_ASSIGNED_PROVER();

    /// @notice Pauses or unpauses the proving process.
    /// @param _state Current TaikoData.State.
    /// @param _pause The pause status.
    function pauseProving(TaikoData.State storage _state, bool _pause) internal {
        if (_state.slotB.provingPaused == _pause) revert L1_INVALID_PAUSE_STATUS();
        _state.slotB.provingPaused = _pause;

        if (!_pause) {
            _state.slotB.lastUnpausedAt = uint64(block.timestamp);
        }
        emit ProvingPaused(_pause);
    }

    /// @dev Proves or contests a block transition.
    /// @param _state Current TaikoData.State.
    /// @param _config Actual TaikoData.Config.
    /// @param _resolver Address resolver interface.
    /// @param _meta The block's metadata.
    /// @param _tran The transition data.
    /// @param _proof The proof.
    /// @return The number of blocks to be verified with this transaction.
    function proveBlock(
        TaikoData.State storage _state,
        TaikoData.Config memory _config,
        IAddressResolver _resolver,
        TaikoData.BlockMetadata memory _meta,
        TaikoData.Transition memory _tran,
        TaikoData.TierProof memory _proof
    )
        internal
        returns (uint8)
    {
        // Make sure parentHash is not zero
        // To contest an existing transition, simply use any non-zero value as
        // the blockHash and stateRoot.
        if (_tran.parentHash == 0 || _tran.blockHash == 0 || _tran.stateRoot == 0) {
            revert L1_INVALID_TRANSITION();
        }

        Local memory local;
        local.b = _state.slotB;

        // Check that the block has been proposed but has not yet been verified.
        if (_meta.id <= local.b.lastVerifiedBlockId || _meta.id >= local.b.numBlocks) {
            revert L1_INVALID_BLOCK_ID();
        }

        local.slot = _meta.id % _config.blockRingBufferSize;
        TaikoData.Block storage blk = _state.blocks[local.slot];

        local.blockId = blk.blockId;
        local.assignedProver = blk.assignedProver;
        local.metaHash = blk.metaHash;

        // Check the integrity of the block data. It's worth noting that in
        // theory, this check may be skipped, but it's included for added
        // caution.
        if (local.blockId != _meta.id || local.metaHash != keccak256(abi.encode(_meta))) {
            revert L1_BLOCK_MISMATCH();
        }

        // Each transition is uniquely identified by the parentHash, with the
        // blockHash and stateRoot open for later updates as higher-tier proofs
        // become available. In cases where a transition with the specified
        // parentHash does not exist, the transition ID (tid) will be set to 0.
        TaikoData.TransitionState storage ts;
        (local.tid, ts) = _fetchOrCreateTransition(_state, blk, _tran, local);

        // The new proof must meet or exceed the minimum tier required by the
        // block or the previous proof; it cannot be on a lower tier.
        if (_proof.tier == 0 || _proof.tier < _meta.minTier || _proof.tier < ts.tier) {
            revert L1_INVALID_TIER();
        }

        // Retrieve the tier configurations. If the tier is not supported, the
        // subsequent action will result in a revert.
        local.tier =
            ITierProvider(_resolver.resolve(LibStrings.B_TIER_PROVIDER, false)).getTier(_proof.tier);

        local.inProvingWindow =
            !LibUtils.isPostDeadline(ts.timestamp, local.b.lastUnpausedAt, local.tier.provingWindow);

        // Checks if only the assigned prover is permissioned to prove the block.
        // The guardian prover is granted exclusive permission to prove only the first
        // transition.
        if (
            local.tier.contestBond != 0 && ts.contester == address(0) && local.tid == 1
                && ts.tier == 0 && local.inProvingWindow
        ) {
            if (msg.sender != local.assignedProver) revert L1_NOT_ASSIGNED_PROVER();
        }
        // We must verify the proof, and any failure in proof verification will
        // result in a revert.
        //
        // It's crucial to emphasize that the proof can be assessed in two
        // potential modes: "proving mode" and "contesting mode." However, the
        // precise verification logic is defined within each tier's IVerifier
        // contract implementation. We simply specify to the verifier contract
        // which mode it should utilize - if the new tier is higher than the
        // previous tier, we employ the proving mode; otherwise, we employ the
        // contesting mode (the new tier cannot be lower than the previous tier,
        // this has been checked above).
        //
        // It's obvious that proof verification is entirely decoupled from
        // Taiko's core protocol.
        if (local.tier.verifierName != "") {
            address verifier = _resolver.resolve(local.tier.verifierName, false);
            bool isContesting = _proof.tier == ts.tier && local.tier.contestBond != 0;

            IVerifier.Context memory ctx = IVerifier.Context({
                metaHash: local.metaHash,
                blobHash: _meta.blobHash,
                // Separate msgSender to allow the prover to be any address in the future.
                prover: msg.sender,
                msgSender: msg.sender,
                blockId: local.blockId,
                isContesting: isContesting,
                blobUsed: _meta.blobUsed
            });

            IVerifier(verifier).verifyProof(ctx, _tran, _proof);
        }

        local.isTopTier = local.tier.contestBond == 0;
        IERC20 tko = IERC20(_resolver.resolve(LibStrings.B_TAIKO_TOKEN, false));

        local.livenessBond = blk.livenessBond;
        if (local.isTopTier) {
            if (local.livenessBond != 0) {
                if (
                    local.inProvingWindow
                        || (
                            _proof.data.length == 32
                                && bytes32(_proof.data) == LibStrings.H_RETURN_LIVENESS_BOND
                        )
                ) {
                    tko.safeTransfer(local.assignedProver, local.livenessBond);
                }
                blk.livenessBond = 0;
                local.livenessBond = 0;
            }
        }

        local.sameTransition = _tran.blockHash == ts.blockHash && _tran.stateRoot == ts.stateRoot;

        if (_proof.tier > ts.tier) {
            // Handles the case when an incoming tier is higher than the current transition's tier.
            // Reverts when the incoming proof tries to prove the same transition
            // (L1_ALREADY_PROVED).
            _overrideWithHigherProof(blk, ts, _tran, _proof, local, tko);

            emit TransitionProved({
                blockId: local.blockId,
                tran: _tran,
                prover: msg.sender,
                validityBond: local.tier.validityBond,
                tier: _proof.tier
            });
        } else {
            // New transition and old transition on the same tier - and if this transaction tries to
            // prove the same, it reverts
            if (local.sameTransition) revert L1_ALREADY_PROVED();

            if (local.isTopTier) {
                // The top tier prover re-proves.
                assert(local.tier.validityBond == 0);
                assert(ts.validityBond == 0 && ts.contester == address(0));

                ts.prover = msg.sender;
                ts.blockHash = _tran.blockHash;
                ts.stateRoot = _tran.stateRoot;

                emit TransitionProved({
                    blockId: local.blockId,
                    tran: _tran,
                    prover: msg.sender,
                    validityBond: 0,
                    tier: _proof.tier
                });
            } else {
                // Contesting but not on the highest tier
                if (ts.contester != address(0)) revert L1_ALREADY_CONTESTED();

                // Making it a non-sliding window, relative when ts.timestamp was registered (or to
                // lastUnpaused if that one is bigger)
                if (
                    LibUtils.isPostDeadline(
                        ts.timestamp, local.b.lastUnpausedAt, local.tier.cooldownWindow
                    )
                ) {
                    revert L1_CANNOT_CONTEST();
                }

                // _checkIfContestable(/*_state,*/ tier.cooldownWindow, ts.timestamp);
                // Burn the contest bond from the prover.
                tko.safeTransferFrom(msg.sender, address(this), local.tier.contestBond);

                // We retain the contest bond within the transition, just in
                // case this configuration is altered to a different value
                // before the contest is resolved.
                //
                // It's worth noting that the previous value of ts.contestBond
                // doesn't have any significance.
                ts.contestBond = local.tier.contestBond;
                ts.contester = msg.sender;

                emit TransitionContested({
                    blockId: local.blockId,
                    tran: _tran,
                    contester: msg.sender,
                    contestBond: local.tier.contestBond,
                    tier: _proof.tier
                });
            }
        }

        ts.timestamp = uint64(block.timestamp);
        return local.tier.maxBlocksToVerifyPerProof;
    }

    /// @dev Handle the transition initialization logic
    function _fetchOrCreateTransition(
        TaikoData.State storage _state,
        TaikoData.Block storage _blk,
        TaikoData.Transition memory _tran,
        Local memory _local
    )
        private
        returns (uint32 tid_, TaikoData.TransitionState storage ts_)
    {
        tid_ = LibUtils.getTransitionId(_state, _blk, _local.slot, _tran.parentHash);

        if (tid_ == 0) {
            // In cases where a transition with the provided parentHash is not
            // found, we must essentially "create" one and set it to its initial
            // state. This initial state can be viewed as a special transition
            // on tier-0.
            //
            // Subsequently, we transform this tier-0 transition into a
            // non-zero-tier transition with a proof. This approach ensures that
            // the same logic is applicable for both 0-to-non-zero transition
            // updates and non-zero-to-non-zero transition updates.
            unchecked {
                // Unchecked is safe:  Not realistic 2**32 different fork choice
                // per block will be proven and none of them is valid
                tid_ = _blk.nextTransitionId++;
            }

            // Keep in mind that state.transitions are also reusable storage
            // slots, so it's necessary to reinitialize all transition fields
            // below.
            ts_ = _state.transitions[_local.slot][tid_];
            ts_.blockHash = 0;
            ts_.stateRoot = 0;
            ts_.validityBond = 0;
            ts_.contester = address(0);
            ts_.contestBond = 1; // to save gas
            ts_.timestamp = _blk.proposedAt;
            ts_.tier = 0;
            ts_.__reserved1 = 0;

            if (tid_ == 1) {
                // This approach serves as a cost-saving technique for the
                // majority of blocks, where the first transition is expected to
                // be the correct one. Writing to `transitions` is more economical
                // since it resides in the ring buffer, whereas writing to
                // `transitionIds` is not as cost-effective.
                ts_.key = _tran.parentHash;

                // In the case of this first transition, the block's assigned
                // prover has the privilege to re-prove it, but only when the
                // assigned prover matches the previous prover. To ensure this,
                // we establish the transition's prover as the block's assigned
                // prover. Consequently, when we carry out a 0-to-non-zero
                // transition update, the previous prover will consistently be
                // the block's assigned prover.
                //
                // While alternative implementations are possible, introducing
                // such changes would require additional if-else logic.
                ts_.prover = _local.assignedProver;
            } else {
                // In scenarios where this transition is not the first one, we
                // straightforwardly reset the transition prover to address
                // zero.
                ts_.prover = address(0);

                // Furthermore, we index the transition for future retrieval.
                // It's worth emphasizing that this mapping for indexing is not
                // reusable. However, given that the majority of blocks will
                // only possess one transition — the correct one — we don't need
                // to be concerned about the cost in this case.
                _state.transitionIds[_local.blockId][_tran.parentHash] = tid_;

                // There is no need to initialize ts.key here because it's only used when tid == 1
            }
        } else {
            // A transition with the provided parentHash has been located.
            ts_ = _state.transitions[_local.slot][tid_];
        }
    }

    /// @dev Handles what happens when either the first transition is being proven or there is a
    /// higher tier proof incoming
    ///
    /// Assume Alice is the initial prover, Bob is the contester, and Cindy is the subsequent
    /// prover. The validity bond `V` is set at 100, and the contestation bond `C` at 500. If Bob
    /// successfully contests, he receives a reward of 65.625, calculated as 3/4 of 7/8 of 100. Cindy
    /// receives 21.875, which is 1/4 of 7/8 of 100, while the protocol retains 12.5 as friction.
    /// Bob's Return on Investment (ROI) is 13.125%, calculated from 65.625 divided by 500.
    // To establish the expected ROI `r` for valid contestations, where the contestation bond `C` to
    // validity bond `V` ratio is `C/V = 21/(32*r)`, and if `r` set at 10%, the C/V ratio will be
    // 6.5625.
    function _overrideWithHigherProof(
        TaikoData.Block storage _blk,
        TaikoData.TransitionState storage _ts,
        TaikoData.Transition memory _tran,
        TaikoData.TierProof memory _proof,
        Local memory _local,
        IERC20 _tko
    )
        private
    {
        // Higher tier proof overwriting lower tier proof
        uint256 reward; // reward to the new (current) prover

        if (_ts.contester != address(0)) {
            if (_local.sameTransition) {
                // The contested transition is proven to be valid, contester loses the game
                reward = _rewardAfterFriction(_ts.contestBond);

                // We return the validity bond back, but the original prover doesn't get any reward.
                _tko.safeTransfer(_ts.prover, _ts.validityBond);
            } else {
                // The contested transition is proven to be invalid, contester wins the game.
                // Contester gets 3/4 of reward, the new prover gets 1/4.
                reward = _rewardAfterFriction(_ts.validityBond) >> 2;

                _tko.safeTransfer(_ts.contester, _ts.contestBond + reward * 3);
            }
        } else {
            if (_local.sameTransition) revert L1_ALREADY_PROVED();

            // The code below will be executed if
            // - 1) the transition is proved for the fist time, or
            // - 2) the transition is contested.
            reward = _rewardAfterFriction(_ts.validityBond);

            if (_local.livenessBond != 0) {
                if (_local.assignedProver == msg.sender && _local.inProvingWindow) {
                    unchecked {
                        reward += _local.livenessBond;
                    }
                }
                _blk.livenessBond = 0;
                _local.livenessBond = 0;
            }
        }

        unchecked {
            if (reward > _local.tier.validityBond) {
                _tko.safeTransfer(msg.sender, reward - _local.tier.validityBond);
            } else if (reward < _local.tier.validityBond) {
                _tko.safeTransferFrom(msg.sender, address(this), _local.tier.validityBond - reward);
            }
        }

        _ts.validityBond = _local.tier.validityBond;
        _ts.contestBond = 1; // to save gas
        _ts.contester = address(0);
        _ts.prover = msg.sender;
        _ts.tier = _proof.tier;

        if (!_local.sameTransition) {
            _ts.blockHash = _tran.blockHash;
            _ts.stateRoot = _tran.stateRoot;
        }
    }

    /// @dev Returns the reward after applying 12.5% friction.
    function _rewardAfterFriction(uint256 _amount) private pure returns (uint256) {
        return _amount == 0 ? 0 : (_amount * 7) >> 3;
    }
}

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

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../../common/IAddressResolver.sol";
import "../../common/LibStrings.sol";
import "../../signal/ISignalService.sol";
import "../tiers/ITierProvider.sol";
import "./LibUtils.sol";

/// @title LibVerifying
/// @notice A library for handling block verification in the Taiko protocol.
/// @custom:security-contact [email protected]
library LibVerifying {
    using LibMath for uint256;
    using SafeERC20 for IERC20;

    // Warning: Any events defined here must also be defined in TaikoEvents.sol.
    /// @notice Emitted when a block is verified.
    /// @param blockId The block ID.
    /// @param prover The actual prover of the block.
    /// @param blockHash The block hash.
    /// @param stateRoot The state root.
    /// @param tier The tier of the transition used for verification.
    event BlockVerified(
        uint256 indexed blockId,
        address indexed prover,
        bytes32 blockHash,
        bytes32 stateRoot,
        uint16 tier
    );

    /// @notice Emitted when some state variable values changed.
    /// @dev This event is currently used by Taiko node/client for block proposal/proving.
    /// @param slotB The SlotB data structure.
    event StateVariablesUpdated(TaikoData.SlotB slotB);

    // Warning: Any errors defined here must also be defined in TaikoErrors.sol.
    error L1_BLOCK_MISMATCH();
    error L1_INVALID_CONFIG();
    error L1_INVALID_GENESIS_HASH();
    error L1_TRANSITION_ID_ZERO();

    /// @notice Initializes the Taiko protocol state.
    /// @param _state The state to initialize.
    /// @param _config The configuration for the Taiko protocol.
    /// @param _genesisBlockHash The block hash of the genesis block.
    function init(
        TaikoData.State storage _state,
        TaikoData.Config memory _config,
        bytes32 _genesisBlockHash
    )
        internal
    {
        if (!_isConfigValid(_config)) revert L1_INVALID_CONFIG();
        if (_genesisBlockHash == 0) revert L1_INVALID_GENESIS_HASH();

        // Init state
        _state.slotA.genesisHeight = uint64(block.number);
        _state.slotA.genesisTimestamp = uint64(block.timestamp);
        _state.slotB.numBlocks = 1;

        // Init the genesis block
        TaikoData.Block storage blk = _state.blocks[0];
        blk.nextTransitionId = 2;
        blk.proposedAt = uint64(block.timestamp);
        blk.verifiedTransitionId = 1;
        blk.metaHash = bytes32(uint256(1)); // Give the genesis metahash a non-zero value.

        // Init the first state transition
        TaikoData.TransitionState storage ts = _state.transitions[0][1];
        ts.blockHash = _genesisBlockHash;
        ts.prover = address(0);
        ts.timestamp = uint64(block.timestamp);

        emit BlockVerified({
            blockId: 0,
            prover: address(0),
            blockHash: _genesisBlockHash,
            stateRoot: 0,
            tier: 0
        });
    }

    /// @dev Verifies up to N blocks.
    function verifyBlocks(
        TaikoData.State storage _state,
        TaikoData.Config memory _config,
        IAddressResolver _resolver,
        uint64 _maxBlocksToVerify
    )
        internal
    {
        if (_maxBlocksToVerify == 0) {
            return;
        }

        // Retrieve the latest verified block and the associated transition used
        // for its verification.
        TaikoData.SlotB memory b = _state.slotB;
        uint64 blockId = b.lastVerifiedBlockId;

        uint64 slot = blockId % _config.blockRingBufferSize;

        TaikoData.Block storage blk = _state.blocks[slot];
        if (blk.blockId != blockId) revert L1_BLOCK_MISMATCH();

        uint32 tid = blk.verifiedTransitionId;

        // The following scenario should never occur but is included as a
        // precaution.
        if (tid == 0) revert L1_TRANSITION_ID_ZERO();

        // The `blockHash` variable represents the most recently trusted
        // blockHash on L2.
        bytes32 blockHash = _state.transitions[slot][tid].blockHash;
        bytes32 stateRoot;
        uint64 numBlocksVerified;
        address tierProvider;

        IERC20 tko = IERC20(_resolver.resolve(LibStrings.B_TAIKO_TOKEN, false));

        // Unchecked is safe:
        // - assignment is within ranges
        // - blockId and numBlocksVerified values incremented will still be OK in the
        // next 584K years if we verifying one block per every second
        unchecked {
            ++blockId;

            while (blockId < b.numBlocks && numBlocksVerified < _maxBlocksToVerify) {
                slot = blockId % _config.blockRingBufferSize;

                blk = _state.blocks[slot];
                if (blk.blockId != blockId) revert L1_BLOCK_MISMATCH();

                tid = LibUtils.getTransitionId(_state, blk, slot, blockHash);
                // When `tid` is 0, it indicates that there is no proven
                // transition with its parentHash equal to the blockHash of the
                // most recently verified block.
                if (tid == 0) break;

                // A transition with the correct `parentHash` has been located.
                TaikoData.TransitionState storage ts = _state.transitions[slot][tid];

                // It's not possible to verify this block if either the
                // transition is contested and awaiting higher-tier proof or if
                // the transition is still within its cooldown period.
                if (ts.contester != address(0)) {
                    break;
                } else {
                    if (tierProvider == address(0)) {
                        tierProvider = _resolver.resolve(LibStrings.B_TIER_PROVIDER, false);
                    }

                    if (
                        !LibUtils.isPostDeadline(
                            ts.timestamp,
                            b.lastUnpausedAt,
                            ITierProvider(tierProvider).getTier(ts.tier).cooldownWindow
                        )
                    ) {
                        // If cooldownWindow is 0, the block can theoretically
                        // be proved and verified within the same L1 block.
                        break;
                    }
                }

                // Mark this block as verified
                blk.verifiedTransitionId = tid;

                // Update variables
                blockHash = ts.blockHash;
                stateRoot = ts.stateRoot;

                tko.safeTransfer(ts.prover, ts.validityBond);

                // Note: We exclusively address the bonds linked to the
                // transition used for verification. While there may exist
                // other transitions for this block, we disregard them entirely.
                // The bonds for these other transitions are burned (more precisely held in custody)
                // either when the transitions are generated or proven. In such cases, both the
                // provers and contesters of those transitions forfeit their bonds.

                emit BlockVerified({
                    blockId: blockId,
                    prover: ts.prover,
                    blockHash: blockHash,
                    stateRoot: stateRoot,
                    tier: ts.tier
                });

                ++blockId;
                ++numBlocksVerified;
            }

            if (numBlocksVerified != 0) {
                uint64 lastVerifiedBlockId = b.lastVerifiedBlockId + numBlocksVerified;

                // Update protocol level state variables
                _state.slotB.lastVerifiedBlockId = lastVerifiedBlockId;

                // Sync chain data
                _syncChainData(_state, _config, _resolver, lastVerifiedBlockId, stateRoot);
            }
        }
    }

    /// @notice Emit events used by client/node.
    function emitEventForClient(TaikoData.State storage _state) internal {
        emit StateVariablesUpdated({ slotB: _state.slotB });
    }

    function _syncChainData(
        TaikoData.State storage _state,
        TaikoData.Config memory _config,
        IAddressResolver _resolver,
        uint64 _lastVerifiedBlockId,
        bytes32 _stateRoot
    )
        private
    {
        ISignalService signalService =
            ISignalService(_resolver.resolve(LibStrings.B_SIGNAL_SERVICE, false));

        (uint64 lastSyncedBlock,) = signalService.getSyncedChainData(
            _config.chainId, LibStrings.H_STATE_ROOT, 0 /* latest block Id*/
        );

        if (_lastVerifiedBlockId > lastSyncedBlock + _config.blockSyncThreshold) {
            _state.slotA.lastSyncedBlockId = _lastVerifiedBlockId;
            _state.slotA.lastSynecdAt = uint64(block.timestamp);

            signalService.syncChainData(
                _config.chainId, LibStrings.H_STATE_ROOT, _lastVerifiedBlockId, _stateRoot
            );
        }
    }

    function _isConfigValid(TaikoData.Config memory _config) private view returns (bool) {
        if (
            _config.chainId <= 1 || _config.chainId == block.chainid //
                || _config.blockMaxProposals <= 1
                || _config.blockRingBufferSize <= _config.blockMaxProposals + 1
                || _config.blockMaxGasLimit == 0 || _config.livenessBond == 0
        ) return false;

        return true;
    }
}

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

import "./TaikoData.sol";

/// @title ITaikoL1
/// @custom:security-contact [email protected]
interface ITaikoL1 {
    /// @notice Proposes a Taiko L2 block.
    /// @param _params Block parameters, currently an encoded BlockParams object.
    /// @param _txList txList data if calldata is used for DA.
    /// @return meta_ The metadata of the proposed L2 block.
    /// @return deposits_ The Ether deposits processed.
    function proposeBlock(
        bytes calldata _params,
        bytes calldata _txList
    )
        external
        payable
        returns (TaikoData.BlockMetadata memory meta_, TaikoData.EthDeposit[] memory deposits_);

    /// @notice Proves or contests a block transition.
    /// @param _blockId The index of the block to prove. This is also used to
    /// select the right implementation version.
    /// @param _input An abi-encoded (TaikoData.BlockMetadata, TaikoData.Transition,
    /// TaikoData.TierProof) tuple.
    function proveBlock(uint64 _blockId, bytes calldata _input) external;

    /// @notice Verifies up to a certain number of blocks.
    /// @param _maxBlocksToVerify Max number of blocks to verify.
    function verifyBlocks(uint64 _maxBlocksToVerify) external;

    /// @notice Gets the configuration of the TaikoL1 contract.
    /// @return Config struct containing configuration parameters.
    function getConfig() external view returns (TaikoData.Config memory);
}

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

/// @title TaikoErrors
/// @notice This abstract contract provides custom error declarations used in
/// the Taiko protocol. Each error corresponds to specific situations where
/// exceptions might be thrown.
/// @dev The errors defined here must match the definitions in the corresponding
/// L1 libraries.
/// @custom:security-contact [email protected]
abstract contract TaikoErrors {
    error L1_ALREADY_CONTESTED();
    error L1_ALREADY_PROVED();
    error L1_BLOB_NOT_AVAILABLE();
    error L1_BLOB_NOT_FOUND();
    error L1_BLOCK_MISMATCH();
    error L1_CANNOT_CONTEST();
    error L1_INVALID_BLOCK_ID();
    error L1_INVALID_CONFIG();
    error L1_INVALID_GENESIS_HASH();
    error L1_INVALID_HOOK();
    error L1_INVALID_PARAM();
    error L1_INVALID_PAUSE_STATUS();
    error L1_INVALID_PROVER();
    error L1_INVALID_SIG();
    error L1_INVALID_TIER();
    error L1_INVALID_TRANSITION();
    error L1_LIVENESS_BOND_NOT_RECEIVED();
    error L1_NOT_ASSIGNED_PROVER();
    error L1_PROVING_PAUSED();
    error L1_RECEIVE_DISABLED();
    error L1_TOO_MANY_BLOCKS();
    error L1_TRANSITION_ID_ZERO();
    error L1_TRANSITION_NOT_FOUND();
    error L1_UNAUTHORIZED();
    error L1_UNEXPECTED_PARENT();
    error L1_UNEXPECTED_TRANSITION_ID();
}

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

import "./TaikoData.sol";

/// @title TaikoEvents
/// @notice This abstract contract provides event declarations for the Taiko
/// protocol, which are emitted during block proposal, proof, verification, and
/// Ethereum deposit processes.
/// @dev The events defined here must match the definitions in the corresponding
/// L1 libraries.
/// @custom:security-contact [email protected]
abstract contract TaikoEvents {
    /// @dev Emitted when a block is proposed.
    /// @param blockId The ID of the proposed block.
    /// @param assignedProver The block's assigned prover.
    /// @param livenessBond The bond in Taiko token from the assigned prover.
    /// @param meta The block metadata containing information about the proposed
    /// block.
    /// @param depositsProcessed Ether deposits processed.
    event BlockProposed(
        uint256 indexed blockId,
        address indexed assignedProver,
        uint96 livenessBond,
        TaikoData.BlockMetadata meta,
        TaikoData.EthDeposit[] depositsProcessed
    );
    /// @dev Emitted when a block is verified.
    /// @param blockId The ID of the verified block.
    /// @param prover The prover whose transition is used for verifying the
    /// block.
    /// @param blockHash The hash of the verified block.
    /// @param stateRoot The block's state root.
    /// @param tier The tier ID of the proof.
    event BlockVerified(
        uint256 indexed blockId,
        address indexed prover,
        bytes32 blockHash,
        bytes32 stateRoot,
        uint16 tier
    );

    /// @notice Emitted when some state variable values changed.
    /// @dev This event is currently used by Taiko node/client for block proposal/proving.
    /// @param slotB The SlotB data structure.
    event StateVariablesUpdated(TaikoData.SlotB slotB);

    /// @dev Emitted when a block transition is proved or re-proved.
    /// @param blockId The ID of the proven block.
    /// @param tran The verified transition.
    /// @param prover The prover address.
    /// @param validityBond The validity bond amount.
    /// @param tier The tier ID of the proof.
    event TransitionProved(
        uint256 indexed blockId,
        TaikoData.Transition tran,
        address prover,
        uint96 validityBond,
        uint16 tier
    );

    /// @dev Emitted when a block transition is contested.
    /// @param blockId The ID of the proven block.
    /// @param tran The verified transition.
    /// @param contester The contester address.
    /// @param contestBond The contesting bond amount.
    /// @param tier The tier ID of the proof.
    event TransitionContested(
        uint256 indexed blockId,
        TaikoData.Transition tran,
        address contester,
        uint96 contestBond,
        uint16 tier
    );

    /// @dev Emitted when proving has been paused
    /// @param paused True if paused, false if unpaused.
    event ProvingPaused(bool paused);

    /// @dev Emitted when an Ethereum deposit is made.
    /// @param deposit The Ethereum deposit information including recipient,
    /// amount, and ID.
    event EthDeposited(TaikoData.EthDeposit deposit);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../../interfaces/draft-IERC1822.sol";
import "../ERC1967/ERC1967Upgrade.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 *
 * _Available since v4.1._
 */
abstract contract UUPSUpgradeable is IERC1822Proxiable, ERC1967Upgrade {
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
    address private immutable __self = address(this);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        require(address(this) != __self, "Function must be called through delegatecall");
        require(_getImplementation() == __self, "Function must be called through active proxy");
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
        _;
    }

    /**
     * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
        return _IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeTo(address newImplementation) public virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) public payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data, true);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeTo} and {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal override onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.0;

import "./OwnableUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {
    address private _pendingOwner;

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

    function __Ownable2Step_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable2Step_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Returns the address of the pending owner.
     */
    function pendingOwner() public view virtual returns (address) {
        return _pendingOwner;
    }

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() public virtual {
        address sender = _msgSender();
        require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner");
        _transferOwnership(sender);
    }

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

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

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "./IAddressManager.sol";
import "./IAddressResolver.sol";

/// @title AddressResolver
/// @notice See the documentation in {IAddressResolver}.
/// @custom:security-contact [email protected]
abstract contract AddressResolver is IAddressResolver, Initializable {
    /// @notice Address of the AddressManager.
    address public addressManager;
    uint256[49] private __gap;

    error RESOLVER_DENIED();
    error RESOLVER_INVALID_MANAGER();
    error RESOLVER_UNEXPECTED_CHAINID();
    error RESOLVER_ZERO_ADDR(uint64 chainId, bytes32 name);

    /// @dev Modifier that ensures the caller is the resolved address of a given
    /// name.
    /// @param _name The name to check against.
    modifier onlyFromNamed(bytes32 _name) {
        if (msg.sender != resolve(_name, true)) revert RESOLVER_DENIED();
        _;
    }

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() {
        _disableInitializers();
    }

    /// @inheritdoc IAddressResolver
    function resolve(
        bytes32 _name,
        bool _allowZeroAddress
    )
        public
        view
        virtual
        returns (address payable)
    {
        return _resolve(uint64(block.chainid), _name, _allowZeroAddress);
    }

    /// @inheritdoc IAddressResolver
    function resolve(
        uint64 _chainId,
        bytes32 _name,
        bool _allowZeroAddress
    )
        public
        view
        virtual
        returns (address payable)
    {
        return _resolve(_chainId, _name, _allowZeroAddress);
    }

    /// @dev Initialization method for setting up AddressManager reference.
    /// @param _addressManager Address of the AddressManager.
    function __AddressResolver_init(address _addressManager) internal virtual onlyInitializing {
        if (block.chainid > type(uint64).max) {
            revert RESOLVER_UNEXPECTED_CHAINID();
        }
        addressManager = _addressManager;
    }

    /// @dev Helper method to resolve name-to-address.
    /// @param _chainId The chainId of interest.
    /// @param _name Name whose address is to be resolved.
    /// @param _allowZeroAddress If set to true, does not throw if the resolved
    /// address is `address(0)`.
    /// @return addr_ Address associated with the given name on the specified
    /// chain.
    function _resolve(
        uint64 _chainId,
        bytes32 _name,
        bool _allowZeroAddress
    )
        private
        view
        returns (address payable addr_)
    {
        address _addressManager = addressManager;
        if (_addressManager == address(0)) revert RESOLVER_INVALID_MANAGER();

        addr_ = payable(IAddressManager(_addressManager).getAddress(_chainId, _name));

        if (!_allowZeroAddress && addr_ == address(0)) {
            revert RESOLVER_ZERO_ADDR(_chainId, _name);
        }
    }
}

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

/// @title LibNetwork
library LibNetwork {
    uint256 internal constant MAINNET = 1;
    uint256 internal constant ROPSTEN = 2;
    uint256 internal constant RINKEBY = 4;
    uint256 internal constant GOERLI = 5;
    uint256 internal constant KOVAN = 42;
    uint256 internal constant HOLESKY = 17_000;
    uint256 internal constant SEPOLIA = 11_155_111;

    uint64 internal constant TAIKO = 167_000;

    /// @dev Checks if the chain ID represents an Ethereum testnet.
    /// @param _chainId The chain ID.
    /// @return true if the chain ID represents an Ethereum testnet, false otherwise.
    function isEthereumTestnet(uint256 _chainId) internal pure returns (bool) {
        return _chainId == LibNetwork.ROPSTEN || _chainId == LibNetwork.RINKEBY
            || _chainId == LibNetwork.GOERLI || _chainId == LibNetwork.KOVAN
            || _chainId == LibNetwork.HOLESKY || _chainId == LibNetwork.SEPOLIA;
    }

    /// @dev Checks if the chain ID represents an Ethereum testnet or the Etheruem mainnet.
    /// @param _chainId The chain ID.
    /// @return true if the chain ID represents an Ethereum testnet or the Etheruem mainnet, false
    /// otherwise.
    function isEthereumMainnetOrTestnet(uint256 _chainId) internal pure returns (bool) {
        return _chainId == LibNetwork.MAINNET || isEthereumTestnet(_chainId);
    }

    /// @dev Checks if the chain ID represents the Taiko L2 mainnet.
    /// @param _chainId The chain ID.
    /// @return true if the chain ID represents the Taiko L2 mainnet.
    function isTaikoMainnet(uint256 _chainId) internal pure returns (bool) {
        return _chainId == TAIKO;
    }

    /// @dev Checks if the chain ID represents an internal Taiko devnet's base layer.
    /// @param _chainId The chain ID.
    /// @return true if the chain ID represents an internal Taiko devnet's base layer, false
    /// otherwise.
    function isTaikoDevnetL1(uint256 _chainId) internal pure returns (bool) {
        return _chainId >= 32_300 && _chainId <= 32_400;
    }

    /// @dev Checks if the chain supports Dencun hardfork. Note that this check doesn't need to be
    /// exhaustive.
    /// @param _chainId The chain ID.
    /// @return true if the chain supports Dencun hardfork, false otherwise.
    function isDencunSupported(uint256 _chainId) internal pure returns (bool) {
        return _chainId == LibNetwork.MAINNET || _chainId == LibNetwork.HOLESKY
            || _chainId == LibNetwork.SEPOLIA || isTaikoDevnetL1(_chainId);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, "\x19Ethereum Signed Message:\n32")
            mstore(0x1c, hash)
            message := keccak256(0x00, 0x3c)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, "\x19\x01")
            mstore(add(ptr, 0x02), domainSeparator)
            mstore(add(ptr, 0x22), structHash)
            data := keccak256(ptr, 0x42)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Data with intended validator, created from a
     * `validator` and `data` according to the version 0 of EIP-191.
     *
     * See {recover}.
     */
    function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x00", validator, data));
    }
}

// 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
pragma solidity 0.8.24;

/// @title IAddressResolver
/// @notice This contract acts as a bridge for name-to-address resolution.
/// It delegates the resolution to the AddressManager. By separating the logic,
/// we can maintain flexibility in address management without affecting the
/// resolving process.
/// @dev Note that the address manager should be changed using upgradability, there
/// is no setAddressManager() function to guarantee atomicity across all
/// contracts that are resolvers.
/// @custom:security-contact [email protected]
interface IAddressResolver {
    /// @notice Resolves a name to its address deployed on this chain.
    /// @param _name Name whose address is to be resolved.
    /// @param _allowZeroAddress If set to true, does not throw if the resolved
    /// address is `address(0)`.
    /// @return Address associated with the given name.
    function resolve(
        bytes32 _name,
        bool _allowZeroAddress
    )
        external
        view
        returns (address payable);

    /// @notice Resolves a name to its address deployed on a specified chain.
    /// @param _chainId The chainId of interest.
    /// @param _name Name whose address is to be resolved.
    /// @param _allowZeroAddress If set to true, does not throw if the resolved
    /// address is `address(0)`.
    /// @return Address associated with the given name on the specified
    /// chain.
    function resolve(
        uint64 _chainId,
        bytes32 _name,
        bool _allowZeroAddress
    )
        external
        view
        returns (address payable);
}

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

/// @title LibStrings
/// @custom:security-contact [email protected]
library LibStrings {
    bytes32 internal constant B_CHAIN_WATCHDOG = bytes32("chain_watchdog");
    bytes32 internal constant B_WITHDRAWER = bytes32("withdrawer");
    bytes32 internal constant B_PROPOSER = bytes32("proposer");
    bytes32 internal constant B_PROPOSER_ONE = bytes32("proposer_one");
    bytes32 internal constant B_SIGNAL_SERVICE = bytes32("signal_service");
    bytes32 internal constant B_TAIKO_TOKEN = bytes32("taiko_token");
    bytes32 internal constant B_TAIKO = bytes32("taiko");
    bytes32 internal constant B_BRIDGE = bytes32("bridge");
    bytes32 internal constant B_ERC20_VAULT = bytes32("erc20_vault");
    bytes32 internal constant B_BRIDGED_ERC20 = bytes32("bridged_erc20");
    bytes32 internal constant B_ERC1155_VAULT = bytes32("erc1155_vault");
    bytes32 internal constant B_BRIDGED_ERC1155 = bytes32("bridged_erc1155");
    bytes32 internal constant B_ERC721_VAULT = bytes32("erc721_vault");
    bytes32 internal constant B_BRIDGED_ERC721 = bytes32("bridged_erc721");
    bytes32 internal constant B_BRIDGE_WATCHDOG = bytes32("bridge_watchdog");
    bytes32 internal constant B_SGX_WATCHDOG = bytes32("sgx_watchdog");
    bytes32 internal constant B_TIER_PROVIDER = bytes32("tier_provider");
    bytes32 internal constant B_TIER_SGX = bytes32("tier_sgx");
    bytes32 internal constant B_TIER_SGX_ZKVM = bytes32("tier_sgx_zkvm");
    bytes32 internal constant B_TIER_GUARDIAN_MINORITY = bytes32("tier_guardian_minority");
    bytes32 internal constant B_TIER_GUARDIAN = bytes32("tier_guardian");
    bytes32 internal constant B_AUTOMATA_DCAP_ATTESTATION = bytes32("automata_dcap_attestation");
    bytes32 internal constant B_PROVER_ASSIGNMENT = bytes32("PROVER_ASSIGNMENT");
    bytes32 internal constant H_RETURN_LIVENESS_BOND = keccak256("RETURN_LIVENESS_BOND");
    bytes32 internal constant H_STATE_ROOT = keccak256("STATE_ROOT");
    bytes32 internal constant H_SIGNAL_ROOT = keccak256("SIGNAL_ROOT");
    string internal constant S_SIGNAL = "SIGNAL";
}

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

import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import "@openzeppelin/contracts/interfaces/IERC1271.sol";

/// @title LibAddress
/// @dev Provides utilities for address-related operations.
/// @custom:security-contact [email protected]
library LibAddress {
    bytes4 private constant _EIP1271_MAGICVALUE = 0x1626ba7e;

    error ETH_TRANSFER_FAILED();

    /// @dev Sends Ether to the specified address. This method will not revert even if sending ether
    /// fails.
    /// This function is inspired by
    /// https://github.com/nomad-xyz/ExcessivelySafeCall/blob/main/src/ExcessivelySafeCall.sol
    /// @param _to The recipient address.
    /// @param _amount The amount of Ether to send in wei.
    /// @param _gasLimit The max amount gas to pay for this transaction.
    /// @return success_ true if the call is successful, false otherwise.
    function sendEther(
        address _to,
        uint256 _amount,
        uint256 _gasLimit,
        bytes memory _calldata
    )
        internal
        returns (bool success_)
    {
        // Check for zero-address transactions
        if (_to == address(0)) revert ETH_TRANSFER_FAILED();
        // dispatch message to recipient
        // by assembly calling "handle" function
        // we call via assembly to avoid memcopying a very large returndata
        // returned by a malicious contract
        assembly {
            success_ :=
                call(
                    _gasLimit, // gas
                    _to, // recipient
                    _amount, // ether value
                    add(_calldata, 0x20), // inloc
                    mload(_calldata), // inlen
                    0, // outloc
                    0 // outlen
                )
        }
    }

    /// @dev Sends Ether to the specified address. This method will revert if sending ether fails.
    /// @param _to The recipient address.
    /// @param _amount The amount of Ether to send in wei.
    /// @param _gasLimit The max amount gas to pay for this transaction.
    function sendEtherAndVerify(address _to, uint256 _amount, uint256 _gasLimit) internal {
        if (_amount == 0) return;
        if (!sendEther(_to, _amount, _gasLimit, "")) {
            revert ETH_TRANSFER_FAILED();
        }
    }

    /// @dev Sends Ether to the specified address. This method will revert if sending ether fails.
    /// @param _to The recipient address.
    /// @param _amount The amount of Ether to send in wei.
    function sendEtherAndVerify(address _to, uint256 _amount) internal {
        sendEtherAndVerify(_to, _amount, gasleft());
    }

    function supportsInterface(
        address _addr,
        bytes4 _interfaceId
    )
        internal
        view
        returns (bool result_)
    {
        if (!Address.isContract(_addr)) return false;

        try IERC165(_addr).supportsInterface(_interfaceId) returns (bool _result) {
            result_ = _result;
        } catch { }
    }
}

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

import "../TaikoData.sol";

/// @title IHook
/// @custom:security-contact [email protected]
interface IHook {
    /// @notice Called when a block is proposed.
    /// @param _blk The proposed block.
    /// @param _meta The metadata of the proposed block.
    /// @param _data The data of the proposed block.
    function onBlockProposed(
        TaikoData.Block calldata _blk,
        TaikoData.BlockMetadata calldata _meta,
        bytes calldata _data
    )
        external
        payable;
}

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

/// @title ITierProvider
/// @notice Defines interface to return tier configuration.
/// @custom:security-contact [email protected]
interface ITierProvider {
    struct Tier {
        bytes32 verifierName;
        uint96 validityBond;
        uint96 contestBond;
        uint24 cooldownWindow; // in minutes
        uint16 provingWindow; // in minutes
        uint8 maxBlocksToVerifyPerProof;
    }

    error TIER_NOT_FOUND();

    /// @dev Retrieves the configuration for a specified tier.
    /// @param tierId ID of the tier.
    /// @return Tier struct containing the tier's parameters.
    function getTier(uint16 tierId) external view returns (Tier memory);

    /// @dev Retrieves the IDs of all supported tiers.
    /// Note that the core protocol requires the number of tiers to be smaller
    /// than 256. In reality, this number should be much smaller.
    /// @return The ids of the tiers.
    function getTierIds() external view returns (uint16[] memory);

    /// @dev Determines the minimal tier for a block based on a random input.
    /// @param rand (Semi) random number.
    /// @return The tier id.
    function getMinTier(uint256 rand) external view returns (uint16);
}

/// @dev Tier ID cannot be zero!
library LibTiers {
    /// @notice Optimistic tier ID.
    uint16 public constant TIER_OPTIMISTIC = 100;

    /// @notice SGX tier ID.
    uint16 public constant TIER_SGX = 200;

    /// @notice SGX + ZKVM tier ID.
    uint16 public constant TIER_SGX_ZKVM = 300;

    /// @notice Guardian tier ID with minority approval.
    uint16 public constant TIER_GUARDIAN_MINORITY = 900;

    /// @notice Guardian tier ID with majority approval.
    uint16 public constant TIER_GUARDIAN = 1000;
}

// 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
pragma solidity 0.8.24;

import "../L1/TaikoData.sol";

/// @title IVerifier
/// @notice Defines the function that handles proof verification.
/// @custom:security-contact [email protected]
interface IVerifier {
    struct Context {
        bytes32 metaHash;
        bytes32 blobHash;
        address prover;
        uint64 blockId;
        bool isContesting;
        bool blobUsed;
        address msgSender;
    }

    /// @notice Verifies a proof.
    /// @param _ctx The context of the proof verification.
    /// @param _tran The transition to verify.
    /// @param _proof The proof to verify.
    function verifyProof(
        Context calldata _ctx,
        TaikoData.Transition calldata _tran,
        TaikoData.TierProof calldata _proof
    )
        external;
}

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

import "../../libs/LibMath.sol";
import "../TaikoData.sol";

/// @title LibUtils
/// @notice A library that offers helper functions.
/// @custom:security-contact [email protected]
library LibUtils {
    using LibMath for uint256;

    // Warning: Any errors defined here must also be defined in TaikoErrors.sol.
    error L1_BLOCK_MISMATCH();
    error L1_INVALID_BLOCK_ID();
    error L1_TRANSITION_NOT_FOUND();
    error L1_UNEXPECTED_TRANSITION_ID();

    /// @notice This function will revert if the transition is not found.
    /// @dev Retrieves the transition with a given parentHash.
    /// @param _state Current TaikoData.State.
    /// @param _config Actual TaikoData.Config.
    /// @param _blockId Id of the block.
    /// @param _parentHash Parent hash of the block.
    /// @return The state transition data of the block.
    function getTransition(
        TaikoData.State storage _state,
        TaikoData.Config memory _config,
        uint64 _blockId,
        bytes32 _parentHash
    )
        internal
        view
        returns (TaikoData.TransitionState storage)
    {
        _checkBlockId(_state, _blockId);
        (TaikoData.Block storage blk, uint64 slot) = getBlock(_state, _config, _blockId);

        uint32 tid = getTransitionId(_state, blk, slot, _parentHash);
        if (tid == 0) revert L1_TRANSITION_NOT_FOUND();

        return _state.transitions[slot][tid];
    }

    /// @notice This function will revert if the transition is not found.
    /// @dev Retrieves the transition with a given parentHash.
    /// @param _state Current TaikoData.State.
    /// @param _config Actual TaikoData.Config.
    /// @param _blockId Id of the block.
    /// @param _tid The transition id.
    /// @return The state transition data of the block.
    function getTransition(
        TaikoData.State storage _state,
        TaikoData.Config memory _config,
        uint64 _blockId,
        uint32 _tid
    )
        internal
        view
        returns (TaikoData.TransitionState storage)
    {
        _checkBlockId(_state, _blockId);
        (TaikoData.Block storage blk, uint64 slot) = getBlock(_state, _config, _blockId);

        if (_tid == 0 || _tid >= blk.nextTransitionId) revert L1_TRANSITION_NOT_FOUND();
        return _state.transitions[slot][_tid];
    }

    /// @dev Retrieves a block based on its ID.
    /// @param _state Current TaikoData.State.
    /// @param _config Actual TaikoData.Config.
    /// @param _blockId Id of the block.
    function getBlock(
        TaikoData.State storage _state,
        TaikoData.Config memory _config,
        uint64 _blockId
    )
        internal
        view
        returns (TaikoData.Block storage blk_, uint64 slot_)
    {
        slot_ = _blockId % _config.blockRingBufferSize;
        blk_ = _state.blocks[slot_];
        if (blk_.blockId != _blockId) {
            revert L1_INVALID_BLOCK_ID();
        }
    }

    /// @dev Retrieves the ID of the transition with a given parentHash.
    /// This function will return 0 if the transition is not found.
    function getTransitionId(
        TaikoData.State storage _state,
        TaikoData.Block storage _blk,
        uint64 _slot,
        bytes32 _parentHash
    )
        internal
        view
        returns (uint32 tid_)
    {
        if (_state.transitions[_slot][1].key == _parentHash) {
            tid_ = 1;
        } else {
            tid_ = _state.transitionIds[_blk.blockId][_parentHash];
        }

        if (tid_ >= _blk.nextTransitionId) revert L1_UNEXPECTED_TRANSITION_ID();
    }

    function isPostDeadline(
        uint256 _tsTimestamp,
        uint256 _lastUnpausedAt,
        uint256 _windowMinutes
    )
        internal
        view
        returns (bool)
    {
        unchecked {
            uint256 deadline = _tsTimestamp.max(_lastUnpausedAt) + _windowMinutes * 60;
            return block.timestamp >= deadline;
        }
    }

    function _checkBlockId(TaikoData.State storage _state, uint64 _blockId) private view {
        TaikoData.SlotB memory b = _state.slotB;
        if (_blockId < b.lastVerifiedBlockId || _blockId >= b.numBlocks) {
            revert L1_INVALID_BLOCK_ID();
        }
    }
}

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

/// @title ISignalService
/// @notice The SignalService contract serves as a secure cross-chain message
/// passing system. It defines methods for sending and verifying signals with
/// merkle proofs. The trust assumption is that the target chain has secure
/// access to the merkle root (such as Taiko injects it in the anchor
/// transaction). With this, verifying a signal is reduced to simply verifying
/// a merkle proof.
/// @custom:security-contact [email protected]
interface ISignalService {
    enum CacheOption {
        CACHE_NOTHING,
        CACHE_SIGNAL_ROOT,
        CACHE_STATE_ROOT,
        CACHE_BOTH
    }

    struct HopProof {
        /// @notice This hop's destination chain ID. If there is a next hop, this ID is the next
        /// hop's source chain ID.
        uint64 chainId;
        /// @notice The ID of a source chain block whose state root has been synced to the hop's
        /// destination chain.
        /// Note that this block ID must be greater than or equal to the block ID where the signal
        /// was sent on the source chain.
        uint64 blockId;
        /// @notice The state root or signal root of the source chain at the above blockId. This
        /// value has been synced to the destination chain.
        /// @dev To get both the blockId and the rootHash, apps should subscribe to the
        /// ChainDataSynced event or query `topBlockId` first using the source chain's ID and
        /// LibStrings.H_STATE_ROOT to get the most recent block ID synced, then call
        /// `getSyncedChainData` to read the synchronized data.
        bytes32 rootHash;
        /// @notice Options to cache either the state roots or signal roots of middle-hops to the
        /// current chain.
        CacheOption cacheOption;
        /// @notice The signal service's account proof. If this value is empty, then `rootHash` will
        /// be used as the signal root, otherwise, `rootHash` will be used as the state root.
        bytes[] accountProof;
        /// @notice The signal service's storage proof.
        bytes[] storageProof;
    }

    /// @notice Emitted when a remote chain's state root or signal root is
    /// synced locally as a signal.
    /// @param chainId The remote chainId.
    /// @param blockId The chain data's corresponding blockId.
    /// @param kind A value to mark the data type.
    /// @param data The remote data.
    /// @param signal The signal for this chain data.
    event ChainDataSynced(
        uint64 indexed chainId,
        uint64 indexed blockId,
        bytes32 indexed kind,
        bytes32 data,
        bytes32 signal
    );

    /// @notice Emitted when a signal is sent.
    /// @param app The address that initiated the signal.
    /// @param signal The signal (message) that was sent.
    /// @param slot The location in storage where this signal is stored.
    /// @param value The value of the signal.
    event SignalSent(address app, bytes32 signal, bytes32 slot, bytes32 value);

    /// @notice Emitted when an address is authorized or deauthorized.
    /// @param addr The address to be authorized or deauthorized.
    /// @param authrized True if authorized, false otherwise.
    event Authorized(address indexed addr, bool authrized);

    /// @notice Send a signal (message) by setting the storage slot to a value of 1.
    /// @param _signal The signal (message) to send.
    /// @return slot_ The location in storage where this signal is stored.
    function sendSignal(bytes32 _signal) external returns (bytes32 slot_);

    /// @notice Sync a data from a remote chain locally as a signal. The signal is calculated
    /// uniquely from chainId, kind, and data.
    /// @param _chainId The remote chainId.
    /// @param _kind A value to mark the data type.
    /// @param _blockId The chain data's corresponding blockId
    /// @param _chainData The remote data.
    /// @return signal_ The signal for this chain data.
    function syncChainData(
        uint64 _chainId,
        bytes32 _kind,
        uint64 _blockId,
        bytes32 _chainData
    )
        external
        returns (bytes32 signal_);

    /// @notice Verifies if a signal has been received on the target chain.
    /// @param _chainId The identifier for the source chain from which the
    /// signal originated.
    /// @param _app The address that initiated the signal.
    /// @param _signal The signal (message) to send.
    /// @param _proof Merkle proof that the signal was persisted on the
    /// source chain.
    /// @return numCacheOps_ The number of newly cached items.
    function proveSignalReceived(
        uint64 _chainId,
        address _app,
        bytes32 _signal,
        bytes calldata _proof
    )
        external
        returns (uint256 numCacheOps_);

    /// @notice Verifies if a signal has been received on the target chain.
    /// This is the "readonly" version of proveSignalReceived.
    /// @param _chainId The identifier for the source chain from which the
    /// signal originated.
    /// @param _app The address that initiated the signal.
    /// @param _signal The signal (message) to send.
    /// @param _proof Merkle proof that the signal was persisted on the
    /// source chain.
    function verifySignalReceived(
        uint64 _chainId,
        address _app,
        bytes32 _signal,
        bytes calldata _proof
    )
        external
        view;

    /// @notice Verifies if a particular signal has already been sent.
    /// @param _app The address that initiated the signal.
    /// @param _signal The signal (message) that was sent.
    /// @return true if the signal has been sent, otherwise false.
    function isSignalSent(address _app, bytes32 _signal) external view returns (bool);

    /// @notice Checks if a chain data has been synced.
    /// uniquely from chainId, kind, and data.
    /// @param _chainId The remote chainId.
    /// @param _kind A value to mark the data type.
    /// @param _blockId The chain data's corresponding blockId
    /// @param _chainData The remote data.
    /// @return true if the data has been synced, otherwise false.
    function isChainDataSynced(
        uint64 _chainId,
        bytes32 _kind,
        uint64 _blockId,
        bytes32 _chainData
    )
        external
        view
        returns (bool);

    /// @notice Returns the given block's  chain data.
    /// @param _chainId Identifier of the chainId.
    /// @param _kind A value to mark the data type.
    /// @param _blockId The chain data's corresponding block id. If this value is 0, use the top
    /// block id.
    /// @return blockId_ The actual block id.
    /// @return chainData_ The synced chain data.
    function getSyncedChainData(
        uint64 _chainId,
        bytes32 _kind,
        uint64 _blockId
    )
        external
        view
        returns (uint64 blockId_, bytes32 chainData_);

    /// @notice Returns the data to be used for caching slot generation.
    /// @param _chainId Identifier of the chainId.
    /// @param _kind A value to mark the data type.
    /// @param _blockId The chain data's corresponding block id. If this value is 0, use the top
    /// block id.
    /// @return signal_ The signal used for caching slot creation.
    function signalForChainData(
        uint64 _chainId,
        bytes32 _kind,
        uint64 _blockId
    )
        external
        pure
        returns (bytes32 signal_);
}

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

/// @title TaikoData
/// @notice This library defines various data structures used in the Taiko
/// protocol.
/// @custom:security-contact [email protected]
library TaikoData {
    /// @dev Struct holding Taiko configuration parameters. See {TaikoConfig}.
    struct Config {
        // ---------------------------------------------------------------------
        // Group 1: General configs
        // ---------------------------------------------------------------------
        // The chain ID of the network where Taiko contracts are deployed.
        uint64 chainId;
        // ---------------------------------------------------------------------
        // Group 2: Block level configs
        // ---------------------------------------------------------------------
        // The maximum number of proposals allowed in a single block.
        uint64 blockMaxProposals;
        // Size of the block ring buffer, allowing extra space for proposals.
        uint64 blockRingBufferSize;
        // The maximum number of verifications allowed when a block is proposed.
        uint64 maxBlocksToVerifyPerProposal;
        // The maximum gas limit allowed for a block.
        uint32 blockMaxGasLimit;
        // ---------------------------------------------------------------------
        // Group 3: Proof related configs
        // ---------------------------------------------------------------------
        // The amount of Taiko token as a prover liveness bond
        uint96 livenessBond;
        // ---------------------------------------------------------------------
        // Group 4: Cross-chain sync
        // ---------------------------------------------------------------------
        // The max number of L2 blocks that can stay unsynced on L1 (a value of zero disables
        // syncing)
        uint8 blockSyncThreshold;
    }

    /// @dev Struct representing prover fees per given tier
    struct TierFee {
        uint16 tier;
        uint128 fee;
    }

    /// @dev A proof and the tier of proof it belongs to
    struct TierProof {
        uint16 tier;
        bytes data;
    }

    /// @dev Hook and it's data (currently used only during proposeBlock)
    struct HookCall {
        address hook;
        bytes data;
    }

    /// @dev Represents proposeBlock's _data input parameter
    struct BlockParams {
        address assignedProver;
        address coinbase;
        bytes32 extraData;
        bytes32 parentMetaHash;
        HookCall[] hookCalls;
        bytes signature;
    }

    /// @dev Struct containing data only required for proving a block
    /// Note: On L2, `block.difficulty` is the pseudo name of
    /// `block.prevrandao`, which returns a random number provided by the layer
    /// 1 chain.
    struct BlockMetadata {
        bytes32 l1Hash;
        bytes32 difficulty;
        bytes32 blobHash; //or txListHash (if Blob not yet supported)
        bytes32 extraData;
        bytes32 depositsHash;
        address coinbase; // L2 coinbase,
        uint64 id;
        uint32 gasLimit;
        uint64 timestamp;
        uint64 l1Height;
        uint16 minTier;
        bool blobUsed;
        bytes32 parentMetaHash;
        address sender; // a.k.a proposer
    }

    /// @dev Struct representing transition to be proven.
    struct Transition {
        bytes32 parentHash;
        bytes32 blockHash;
        bytes32 stateRoot;
        bytes32 graffiti; // Arbitrary data that the prover can use for various purposes.
    }

    /// @dev Struct representing state transition data.
    /// 10 slots reserved for upgradability, 6 slots used.
    struct TransitionState {
        bytes32 key; // slot 1, only written/read for the 1st state transition.
        bytes32 blockHash; // slot 2
        bytes32 stateRoot; // slot 3
        address prover; // slot 4
        uint96 validityBond;
        address contester; // slot 5
        uint96 contestBond;
        uint64 timestamp; // slot 6 (90 bits)
        uint16 tier;
        uint8 __reserved1;
    }

    /// @dev Struct containing data required for verifying a block.
    /// 3 slots used.
    struct Block {
        bytes32 metaHash; // slot 1
        address assignedProver; // slot 2
        uint96 livenessBond;
        uint64 blockId; // slot 3
        uint64 proposedAt; // timestamp
        uint64 proposedIn; // L1 block number, required/used by node/client.
        uint32 nextTransitionId;
        uint32 verifiedTransitionId;
    }

    /// @dev Struct representing an Ethereum deposit.
    /// 2 slot used. Currently removed from protocol, but to be backwards compatible, the struct and
    /// return values stayed for now.
    struct EthDeposit {
        address recipient;
        uint96 amount;
        uint64 id;
    }

    /// @dev Forge is only able to run coverage in case the contracts by default
    /// capable of compiling without any optimization (neither optimizer runs,
    /// no compiling --via-ir flag).
    /// In order to resolve stack too deep without optimizations, we needed to
    /// introduce outsourcing vars into structs below.
    struct SlotA {
        uint64 genesisHeight;
        uint64 genesisTimestamp;
        uint64 lastSyncedBlockId;
        uint64 lastSynecdAt; // typo!
    }

    struct SlotB {
        uint64 numBlocks;
        uint64 lastVerifiedBlockId;
        bool provingPaused;
        uint8 __reservedB1;
        uint16 __reservedB2;
        uint32 __reservedB3;
        uint64 lastUnpausedAt;
    }

    /// @dev Struct holding the state variables for the {TaikoL1} contract.
    struct State {
        // Ring buffer for proposed blocks and a some recent verified blocks.
        mapping(uint64 blockId_mod_blockRingBufferSize => Block blk) blocks;
        // Indexing to transition ids (ring buffer not possible)
        mapping(uint64 blockId => mapping(bytes32 parentHash => uint32 transitionId)) transitionIds;
        // Ring buffer for transitions
        mapping(
            uint64 blockId_mod_blockRingBufferSize
                => mapping(uint32 transitionId => TransitionState ts)
            ) transitions;
        // Ring buffer for Ether deposits
        bytes32 __reserve1;
        SlotA slotA; // slot 5
        SlotB slotB; // slot 6
        uint256[44] __gap;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822Proxiable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeacon.sol";
import "../../interfaces/IERC1967.sol";
import "../../interfaces/draft-IERC1822.sol";
import "../../utils/Address.sol";
import "../../utils/StorageSlot.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 */
abstract contract ERC1967Upgrade is IERC1967 {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data, bool forceCall) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.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.
 *
 * By default, the owner account will be the one that deploys the contract. 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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

    /**
     * @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 {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @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 {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _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);
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.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]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

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

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

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

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

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

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

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

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

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

/// @title IAddressManager
/// @notice Manages a mapping of (chainId, name) pairs to Ethereum addresses.
/// @custom:security-contact [email protected]
interface IAddressManager {
    /// @notice Gets the address mapped to a specific chainId-name pair.
    /// @dev Note that in production, this method shall be a pure function
    /// without any storage access.
    /// @param _chainId The chainId for which the address needs to be fetched.
    /// @param _name The name for which the address needs to be fetched.
    /// @return Address associated with the chainId-name pair.
    function getAddress(uint64 _chainId, bytes32 _name) external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// 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: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 *
 * _Available since v4.1._
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with _data
     */
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}

// 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
pragma solidity 0.8.24;

/// @title LibMath
/// @dev This library offers additional math functions for uint256.
/// @custom:security-contact [email protected]
library LibMath {
    /// @dev Returns the smaller of the two given values.
    /// @param _a The first number to compare.
    /// @param _b The second number to compare.
    /// @return The smaller of the two numbers.
    function min(uint256 _a, uint256 _b) internal pure returns (uint256) {
        return _a > _b ? _b : _a;
    }

    /// @dev Returns the larger of the two given values.
    /// @param _a The first number to compare.
    /// @param _b The second number to compare.
    /// @return The larger of the two numbers.
    function max(uint256 _a, uint256 _b) internal pure returns (uint256) {
        return _a > _b ? _a : _b;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC1967.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 *
 * _Available since v4.8.3._
 */
interface IERC1967 {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
 * _Available since v4.9 for `string`, `bytes`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    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;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

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

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

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

{
  "remappings": [
    "@openzeppelin/contracts-upgradeable/=node_modules/@openzeppelin/contracts-upgradeable/",
    "@openzeppelin/contracts/=node_modules/@openzeppelin/contracts/",
    "solady/=node_modules/solady/",
    "forge-std/=node_modules/forge-std/",
    "ds-test/=node_modules/ds-test/src/",
    "p256-verifier/=node_modules/p256-verifier/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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