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// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

import '@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol';
import '@openzeppelin/contracts-upgradeable/token/ERC721/extensions/ERC721EnumerableUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol';

import './interfaces/ICarbonOffsetBatches.sol';
import './interfaces/ICarbonProjectVintages.sol';
import './interfaces/ICarbonCoreCarbonOffsets.sol';
import './interfaces/ICarbonCoreCarbonOffsetsFactory.sol';
import './interfaces/ICarbonCoreContractRegistry.sol';
import './carboncore/indexers/main/ICarbonIndexer.sol';

import './CarbonOffsetBatchesStorage.sol';
import {Errors} from './libraries/Errors.sol';
import './libraries/ProjectVintageUtils.sol';
import './libraries/Modifiers.sol';
import './libraries/Strings.sol';

/// @title A contract for managing batches of carbon credits
/// @notice Also referred to as Batch-Contract (formerly BatchCollection)
/// Contract that tokenizes retired/cancelled CO2 credits into NFTs via a claims process
contract CarbonOffsetBatches is
    ICarbonOffsetBatches,
    ERC721EnumerableUpgradeable,
    OwnableUpgradeable,
    PausableUpgradeable,
    AccessControlUpgradeable,
    UUPSUpgradeable,
    ProjectVintageUtils,
    Modifiers,
    CarbonOffsetBatchesStorage
{
    using SafeERC20Upgradeable for IERC20Upgradeable;
    using Strings for string;

    // ----------------------------------------
    //      Constants
    // ----------------------------------------

    /// @dev Version-related parameters. VERSION keeps track of production
    /// releases. VERSION_RELEASE_CANDIDATE keeps track of iterations
    /// of a VERSION in our staging environment.
    string public constant VERSION = '1.5.0';
    uint256 public constant VERSION_RELEASE_CANDIDATE = 1;

    /// @dev All roles related to accessing this contract
    bytes32 public constant VERIFIER_ROLE = keccak256('VERIFIER_ROLE');
    bytes32 public constant TOKENIZER_ROLE = keccak256('TOKENIZER_ROLE');

    // ----------------------------------------
    //      Events
    // ----------------------------------------

    event BatchMinted(address sender, uint256 tokenId);
    event BatchUpdated(uint256 tokenId, string serialNumber, uint256 quantity);
    event BatchLinkedWithVintage(
        uint256 tokenId,
        uint256 projectVintageTokenId
    );
    event BatchComment(
        uint256 tokenId,
        uint256 commentId,
        address sender,
        string comment
    );
    event BatchStatusUpdate(uint256 tokenId, BatchStatus status);
    event RegistrySupported(string registry, bool isSupported);
    event Tokenized(
        uint256 tokenId,
        address tcc,
        address indexed recipient,
        uint256 amount
    );

    event Split(uint256 tokenId, uint256 newTokenId);

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

    // ----------------------------------------
    //      Upgradable related functions
    // ----------------------------------------

    function initialize(address _contractRegistry)
        external
        virtual
        initializer
    {
        __Context_init_unchained();
        __ERC721_init_unchained(
            'CarbonCore Protocol: Carbon Offset Batches',
            'CARBONCORE-COB'
        );
        __Ownable_init_unchained();
        __Pausable_init_unchained();
        __AccessControl_init_unchained();
        __UUPSUpgradeable_init_unchained();

        contractRegistry = _contractRegistry;
        _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
    }

    function _authorizeUpgrade(address newImplementation)
        internal
        virtual
        override
        onlyOwner
    {}

    // ------------------------
    // Poor person's modifiers
    // ------------------------

    function onlyWithRole(bytes32 role) internal view {
        if (!hasRole(role, msg.sender)) revert(Errors.COB_INVALID_CALLER);
    }

    function onlyEscrow() internal view {
        address escrow = ICarbonCoreContractRegistry(contractRegistry)
            .carboncoreCarbonOffsetsEscrowAddress();
        if (escrow != msg.sender) revert(Errors.COB_INVALID_CALLER);
    }

    function onlyPending(uint256 tokenId) internal view {
        if (nftList[tokenId].status != BatchStatus.Pending)
            revert(Errors.COB_INVALID_STATUS);
    }

    function onlyApprovedOrOwner(uint256 tokenId) internal view {
        if (!_isApprovedOrOwner(_msgSender(), tokenId))
            revert(Errors.COB_TRANSFER_NOT_APPROVED);
    }

    function onlyVerifierOrBatchOwner(uint256 tokenId) internal view {
        if (
            ownerOf(tokenId) != _msgSender() &&
            !hasRole(VERIFIER_ROLE, msg.sender)
        ) revert(Errors.COB_NOT_VERIFIER_OR_BATCH_OWNER);
    }

    function onlyValidNewStatus(BatchStatus statusA, BatchStatus statusB)
        internal
        pure
    {
        if (statusA != statusB) revert(Errors.COB_INVALID_NEW_STATUS);
    }

    function onlyUnpaused() internal view {
        if (paused()) revert(Errors.COB_PAUSED_CONTRACT);
    }

    // ------------------------
    //      Admin functions
    // ------------------------

    /// @notice Emergency function to disable contract's core functionality
    /// @dev wraps _pause(), callable only by the CarbonCore contract registry or the contract owner
    function pause() external onlyBy(contractRegistry, owner()) {
        _pause();
    }

    /// @notice Emergency function to re-enable contract's core functionality after being paused
    /// @dev wraps _unpause(), callable only by the CarbonCore contract registry or the contract owner
    function unpause() external onlyBy(contractRegistry, owner()) {
        _unpause();
    }

    /// @notice Admin function to set the contract registry
    /// @dev Callable only by the contract owner
    /// @param _address The address of the new contract registry
    function setCarbonCoreContractRegistry(address _address) external onlyOwner {
        contractRegistry = _address;
    }

    /// @notice Admin function to set whether a registry is supported
    /// @dev Callable only by the contract owner; executable only if the status can be changed
    /// @param registry The registry to set supported status for
    /// @param isSupported Whether the registry should be supported
    function setSupportedRegistry(string memory registry, bool isSupported)
        external
        onlyOwner
    {
        if (supportedRegistries[registry] == isSupported)
            revert(Errors.COB_ALREADY_SUPPORTED);

        supportedRegistries[registry] = isSupported;
        emit RegistrySupported(registry, isSupported);
    }

    /// @dev internal helper function to set the status and emit an event
    function _updateStatus(uint256 tokenId, BatchStatus newStatus)
        internal
        virtual
    {
        BatchStatus currentStatus = nftList[tokenId].status;
        nftList[tokenId].status = newStatus;


        emit BatchStatusUpdate(tokenId, newStatus);
    }
    
    /// @notice Set the status of a batch to a new status
    /// for detokenization or retirement requests.
    ///
    /// Valid transitions:
    /// - In case a user makes a request:
    ///   - Confirmed -> DetokenizationRequested
    ///   - Confirmed -> RetirementRequested
    /// - In case a DETOKENIZER_ROLE in TCC finalizes a request:
    ///   - DetokenizationRequested -> DetokenizationFinalized
    ///   - RetirementRequested -> RetirementFinalized
    /// - In case a DETOKENIZER_ROLE in TCC reverts a request:
    ///   - DetokenizationRequested -> Confirmed
    ///   - RetirementRequested -> Confirmed
    ///
    /// @dev Callable only by the escrow contract, only for batches owned by a TCC contract
    /// @param tokenId The token ID of the batch
    /// @param newStatus The new status to set
    function setStatusForDetokenizationOrRetirement(
        uint256 tokenId,
        BatchStatus newStatus
    ) external virtual override {
        onlyUnpaused();
        onlyEscrow();
        address tokenOwner = ownerOf(tokenId);
        if (!ICarbonCoreContractRegistry(contractRegistry).isValidERC20(tokenOwner))
            revert(Errors.COB_INVALID_BATCH_OWNER);
        BatchStatus currentStatus = nftList[tokenId].status;
        // Only valid transition to a requested status is from a confirmed batch
        if (
            newStatus == BatchStatus.DetokenizationRequested ||
            newStatus == BatchStatus.RetirementRequested
        ) {
            onlyValidNewStatus(currentStatus, BatchStatus.Confirmed);
            // Only valid transition to a finalized status is from a requested status
        } else if (newStatus == BatchStatus.DetokenizationFinalized) {
            onlyValidNewStatus(
                currentStatus,
                BatchStatus.DetokenizationRequested
            );
        } else if (newStatus == BatchStatus.RetirementFinalized) {
            onlyValidNewStatus(currentStatus, BatchStatus.RetirementRequested);
            // Only valid transition to a confirmed status is from a requested status
        } else if (newStatus == BatchStatus.Confirmed) {
            if (
                currentStatus != BatchStatus.DetokenizationRequested &&
                currentStatus != BatchStatus.RetirementRequested
            ) revert(Errors.COB_INVALID_NEW_STATUS);
        } else {
            revert(Errors.COB_INVALID_NEW_STATUS);
        }
        _updateStatus(tokenId, newStatus);
    }

    /// @notice Function to approve a Batch-NFT after validation.
    /// Fractionalization requires status Confirmed.
    /// @dev Callable only by verifiers, only for pending batches. This flow requires a previous linking with a vintage
    /// @param tokenId The token ID of the batch
    function confirmBatch(uint256 tokenId) external virtual {
        onlyUnpaused();
        onlyWithRole(VERIFIER_ROLE);
        _confirmBatch(tokenId);
    }

    /// @dev Internal function that requires a previous linking with a `projectVintageTokenId`.
    function _confirmBatch(uint256 _tokenId) internal {
        if (!_exists(_tokenId)) revert(Errors.COB_NOT_EXISTS);
        onlyPending(_tokenId);
        if (nftList[_tokenId].projectVintageTokenId == 0)
            revert(Errors.COB_MISSING_VINTAGE);
        if (serialNumberApproved[nftList[_tokenId].serialNumber])
            revert(Errors.COB_ALREADY_APPROVED);
        // setting serialnumber as unique after confirmation
        serialNumberApproved[nftList[_tokenId].serialNumber] = true;
        _updateStatus(_tokenId, BatchStatus.Confirmed);
        
    }

   

    
    /// @notice Reject Batch-NFTs, e.g. if the serial number entered is incorrect.
    /// @dev Callable only by verifiers, only for pending batches.
    /// @param tokenId The token ID of the batch
    function rejectBatch(uint256 tokenId) public virtual {
        onlyUnpaused();
        onlyWithRole(VERIFIER_ROLE);
        onlyPending(tokenId);

        // unsetting serialnumber with rejection
        serialNumberApproved[nftList[tokenId].serialNumber] = false;
        _updateStatus(tokenId, BatchStatus.Rejected);
    }

    /// @notice Function to reject Batch-NFTs, including a reason to be displayed to the user.
    function rejectWithComment(uint256 tokenId, string memory comment)
        external
        virtual
    {
        onlyUnpaused();
        rejectBatch(tokenId);
        _addComment(tokenId, comment);
    }

    /// @dev admin function to reject a previously approved batch
    /// Requires that the Batch-NFT has not been fractionalized yet
    function rejectApprovedWithComment(uint256 tokenId, string memory comment)
        external
    {
        onlyUnpaused();
        onlyWithRole(VERIFIER_ROLE);
        if (nftList[tokenId].status != BatchStatus.Confirmed)
            revert(Errors.COB_NOT_CONFIRMED);
        if (
            ICarbonCoreContractRegistry(contractRegistry).isValidERC20(
                ownerOf(tokenId)
            )
        ) revert(Errors.COB_ALREADY_FRACTIONALIZED);
        _updateStatus(tokenId, BatchStatus.Rejected);
        _addComment(tokenId, comment);
    }

    /// @notice Set batches back to pending after a rejection. This can
    /// be useful if there was an issue unrelated to the on-chain data of the
    /// batch, e.g. the batch was incorrectly rejected.
    /// @dev Callable only by verifiers, only for rejected batches.
    /// @param tokenId The token ID of the batch
    function setToPending(uint256 tokenId) external virtual {
        onlyUnpaused();
        onlyWithRole(VERIFIER_ROLE);
        if (nftList[tokenId].status != BatchStatus.Rejected)
            revert(Errors.COB_NOT_REJECTED);
        _updateStatus(tokenId, BatchStatus.Pending);
    }

    /// @notice Link Batch-NFT with Vintage
    /// @dev Function for alternative flow where Batch-NFT approval is done separately. Callable only by verifiers.
    /// @param tokenId The token ID of the batch
    /// @param projectVintageTokenId The token ID of the vintage
    function linkWithVintage(uint256 tokenId, uint256 projectVintageTokenId)
        external
        virtual
    {
        onlyUnpaused();
        onlyWithRole(VERIFIER_ROLE);
        _linkWithVintage(tokenId, projectVintageTokenId);
    }

    // @dev Function to internally link with Vintage when Batch-NFT approval is done seperately.
    function _linkWithVintage(uint256 _tokenId, uint256 _projectVintageTokenId)
        internal
    {
        checkProjectVintageTokenExists(
            contractRegistry,
            _projectVintageTokenId
        );
        nftList[_tokenId].projectVintageTokenId = _projectVintageTokenId;
        emit BatchLinkedWithVintage(_tokenId, _projectVintageTokenId);
    }

    /// @notice Link with vintage and confirm Batch-NFT
    /// @dev Function for main approval flow. Callable only by verifiers.
    /// @param tokenId The token ID of the batch
    /// @param projectVintageTokenId The token ID of the vintage
    function confirmBatchWithVintage(
        uint256 tokenId,
        uint256 projectVintageTokenId
    ) external virtual {
        onlyUnpaused();
        onlyWithRole(VERIFIER_ROLE);
        // We don't want this to be a "backdoor" for modifying the vintage; it
        // could be insecure or allow accidents to happen, and it would also
        // result in BatchLinkedWithVintage being emitted more than once per
        // batch.
        if (nftList[tokenId].projectVintageTokenId != 0)
            revert(Errors.COB_VINTAGE_ALREADY_SET);
        _linkWithVintage(tokenId, projectVintageTokenId);
        _confirmBatch(tokenId);
    }

    /// @notice Remove a previously approved serial number
    /// @dev Function to remove uniqueness for previously set serialnumbers. Callable only by verifiers.
    /// N.B. even though (technically speaking) calling this to complete the
    /// upgrade to a fixed contract is the responsibility of the contract's
    /// owner (deployer), in practice that is a multi-sig even before upgrade,
    /// and unsetting a bunch of serials via multi-sig is not practical.
    /// So instead we allow the verifiers to do it.
    /// @param serialNumber The serial number to unset
    function unsetSerialNumber(string memory serialNumber) external {
        onlyWithRole(VERIFIER_ROLE);
        serialNumberApproved[serialNumber] = false;
    }

    // ----------------------------------
    //  (Semi-)Permissionless functions
    // ----------------------------------

    /// @notice Permissionlessly mint empty Batch-NFTs
    /// Entry point to the carbon bridging process.
    /// @dev To be updated by NFT owner after serial number has been provided
    /// @param to The address the NFT should be minted to. This should be the user.
    /// @return The token ID of the newly minted NFT
    function mintEmptyBatch(address to) external virtual returns (uint256) {
        onlyUnpaused();
        return _mintEmptyBatch(to, to);
    }

    /// @notice Permissionlessly mint empty Batch-NFTs
    /// Entry point to the carbon bridging process.
    /// @dev To be updated by NFT owner after serial number has been provided
    /// @param to The address the NFT should be minted to. This should be the user
    /// but can also be the CarbonOffsetBatches contract itself in case the batch-NFT
    /// is held temporarily by the contract before fractionalization (see tokenize()).
    /// @param onBehalfOf The address of user on behalf of whom the batch is minted
    /// @return newItemId The token ID of the newly minted NFT
    function _mintEmptyBatch(address to, address onBehalfOf)
        internal
        returns (uint256 newItemId)
    {
        newItemId = batchTokenCounter;
        unchecked {
            ++newItemId;
        }
        batchTokenCounter = newItemId;

        _safeMint(to, newItemId);
        nftList[newItemId].status = BatchStatus.Pending;
        nftList[newItemId].quantity = 0;

        emit BatchMinted(onBehalfOf, newItemId);
    }

    /// @notice Update Batch-NFT after Serialnumber has been verified
    /// @dev Data is usually inserted by the user (NFT owner) via the UI. Callable only by verifiers or the batch-NFT
    /// owner.
    /// @param tokenId The token ID of the batch
    /// @param serialNumber The serial number received from the registry/credit cancellation
    /// @param quantity Quantity in TCC, greater than 0
    /// @param uri Optional tokenURI with additional information
    function updateBatchWithData(
        uint256 tokenId,
        string memory serialNumber,
        uint256 quantity,
        string memory uri
    ) external virtual {
        onlyUnpaused();
        onlyVerifierOrBatchOwner(tokenId);
        onlyPending(tokenId);
        _updateSerialAndQuantity(tokenId, serialNumber, quantity);

        if (!uri.equals(nftList[tokenId].uri)) nftList[tokenId].uri = uri;
    }

    /// @notice Internal function that updates batch-NFT after serial number has been verified
    function _updateSerialAndQuantity(
        uint256 tokenId,
        string memory serialNumber,
        uint256 quantity
    ) internal {
        if (serialNumberApproved[serialNumber])
            revert(Errors.COB_ALREADY_APPROVED);
        if (quantity == 0) revert(Errors.COB_INVALID_QUANTITY);
        nftList[tokenId].serialNumber = serialNumber;
        uint256 prevQuantity = nftList[tokenId].quantity;
        nftList[tokenId].quantity = quantity;

        BatchStatus status = nftList[tokenId].status;
        

        emit BatchUpdated(tokenId, serialNumber, quantity);
    }

    /// @notice Update batch-NFT with serial number and quantity only
    /// @dev Convenience function to only update serial number and quantity and not the serial/URI. Callable only by a
    /// verifier or the batch-NFT owner.
    /// @param tokenId The token ID of the batch
    /// @param newSerialNumber The serial number received from the registry/credit cancellation
    /// @param newQuantity Quantity in TCC, greater than 0
    function setSerialandQuantity(
        uint256 tokenId,
        string memory newSerialNumber,
        uint256 newQuantity
    ) external virtual {
        onlyUnpaused();
        onlyVerifierOrBatchOwner(tokenId);
        onlyPending(tokenId);
        _updateSerialAndQuantity(tokenId, newSerialNumber, newQuantity);
    }

    /// @notice Returns just the confirmation (approval) status of Batch-NFT
    /// @param tokenId The token ID of the batch
    function getConfirmationStatus(uint256 tokenId)
        external
        view
        virtual
        override
        returns (BatchStatus)
    {
        return nftList[tokenId].status;
    }

    function getSerialNumber(uint256 tokenId)
        external
        view
        virtual
        override
        returns (string memory)
    {
        return nftList[tokenId].serialNumber;
    }
    

    /// @notice Returns all data for Batch-NFT
    /// @dev Used in TCC contract's receive hook `onERC721Received`
    /// @param tokenId The token ID of the batch
    /// @return projectVintageTokenId The token ID of the vintage
    /// @return quantity Quantity in TCC
    /// @return status The status of the batch
    function getBatchNFTData(uint256 tokenId)
        external
        view
        virtual
        override
        returns (
            uint256,
            uint256,/*normalized amount*/
            BatchStatus
        )
    {
        if (!_exists(tokenId)) revert(Errors.COB_NOT_EXISTS);
        return (
            nftList[tokenId].projectVintageTokenId,
            nftList[tokenId].quantity,/*normalized amount*/
            nftList[tokenId].status
        );
    }

    /// @dev Overridden here because of function overloading issues with ethers.js
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override(ERC721Upgradeable, IERC721Upgradeable) {
        onlyApprovedOrOwner(tokenId);
        safeTransferFrom(from, to, tokenId, '');
    }

    /// @notice Automatically converts Batch-NFT to TCCs (ERC20)
    /// @dev Only by the batch-NFT owner or approved operator, only if batch is confirmed.
    /// Batch-NFT is sent from the sender and TCCs are transferred to the sender.
    /// Queries the factory to find the corresponding TCC contract
    /// Fractionalization happens via receive hook on `safeTransferFrom`
    /// @param tokenId The token ID of the batch
    function fractionalize(uint256 tokenId) external virtual {
        onlyApprovedOrOwner(tokenId);
        // Fractionalize by transferring the batch-NFT to the TCC contract.
        safeTransferFrom(
            _msgSender(),
            _getTCCForBatchTokenId(tokenId),
            tokenId,
            ''
        );
    }

    /// @dev returns the address of the TCC contract that corresponds to the batch-NFT
    function _getTCCForBatchTokenId(uint256 tokenId)
        internal
        view
        returns (address)
    {
        uint256 pvId = nftList[tokenId].projectVintageTokenId;
        ICarbonCoreContractRegistry tcnRegistry = ICarbonCoreContractRegistry(
            contractRegistry
        );

        // Fetch the registry from the vintage data first
        address vintages = tcnRegistry.carbonProjectVintagesAddress();
        VintageData memory data = ICarbonProjectVintages(vintages)
            .getProjectVintageDataByTokenId(pvId);

        // Now we can fetch the TCC factory for the carbon registry
        string memory carbonRegistry = data.registry;
        if (bytes(carbonRegistry).length == 0) {
            carbonRegistry = 'verra';
        }
        address tccFactory = tcnRegistry.carboncoreCarbonOffsetsFactoryAddress(
            carbonRegistry
        );

        return ICarbonCoreCarbonOffsetsFactory(tccFactory).pvIdtoERC20(pvId);
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(AccessControlUpgradeable, ERC721EnumerableUpgradeable)
        returns (bool)
    {
        return
            interfaceId == type(IAccessControlUpgradeable).interfaceId ||
            ERC721Upgradeable.supportsInterface(interfaceId);
    }

    function _baseURI() internal view virtual override returns (string memory) {
        return baseURI;
    }

    function setBaseURI(string memory gateway) external onlyOwner {
        baseURI = gateway;
    }

    /// @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
    /// based on the ERC721URIStorage implementation
    function tokenURI(uint256 tokenId)
        public
        view
        virtual
        override
        returns (string memory)
    {
        if (!_exists(tokenId)) revert(Errors.COB_NOT_EXISTS);

        string memory uri = nftList[tokenId].uri;
        // If there is no base URI, return the token URI.
        if (bytes(_baseURI()).length == 0) return uri;
        // If both are set, concatenate the baseURI and tokenURI
        if (bytes(uri).length > 0) return string.concat(_baseURI(), uri);

        return super.tokenURI(tokenId);
    }

    /// @dev Utilized here in order to disable transfers when paused
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount,
        uint256 batchSize
    ) internal virtual override {
        onlyUnpaused();
        super._beforeTokenTransfer(from, to, amount, batchSize);
    }

    /// @notice Append a comment to a Batch-NFT
    /// @dev Don't allow the contract owner to comment.  When the contract owner
    /// can also be a verifier they should add them as a verifier first; this
    /// should prevent accidental comments from the wrong account.
    function addComment(uint256 tokenId, string memory comment) external {
        // this also checks that tokenId exists, otherwise ERC721Upgradeable.ownerOf would revert on nonexistent token
        onlyVerifierOrBatchOwner(tokenId);
        _addComment(tokenId, comment);
    }

    function _addComment(uint256 tokenId, string memory comment) internal {
        nftList[tokenId].comments.push() = comment;
        nftList[tokenId].commentAuthors.push() = _msgSender();
        emit BatchComment(
            tokenId,
            nftList[tokenId].comments.length,
            _msgSender(),
            comment
        );
    }

    /// @notice This function allows external APIs to tokenize their carbon credits
    /// @dev Callable only by tokenizers. Performs the full tokenization process: minting a batch-NFT, linking it with a project
    /// vintage, setting the quantity and serial number, confirming the batch, and fractionalizing it. The TCCs are
    /// then transferred to the recipient.
    /// @param recipient Recipient of the tokens
    /// @param serialNumber Serial number of the carbon credits to be tokenized
    /// @param quantity Quantity to be tokenized in 1e18 format, greater than 0
    /// @param projectVintageTokenId The token ID of the vintage
    /// @return tokenId The token ID of the newly minted batch
    function tokenize(
        address recipient,
        string calldata serialNumber,
        uint256 quantity,
        uint256 projectVintageTokenId
    ) external returns (uint256 tokenId) {
        onlyUnpaused();
        onlyWithRole(TOKENIZER_ROLE);
        // Prepare and confirm batch
        
        tokenId = _mintEmptyBatch(address(this), recipient);
        _linkWithVintage(tokenId, projectVintageTokenId);
        ICarbonIndexer( ICarbonCoreContractRegistry(contractRegistry).carbonIndexerAddress() ).addMintedBatch(projectVintageTokenId, tokenId);

        _updateSerialAndQuantity(tokenId, serialNumber, quantity);
        _confirmBatch(tokenId);

        ICarbonIndexer indexer = ICarbonIndexer( ICarbonCoreContractRegistry(contractRegistry).carbonIndexerAddress() );
        indexer.addBatchToVintage(tokenId);


        // Check existing TCC balance; to be used at the end
        // to send the exact TCC needed to the recipient.
        address tcc = _getTCCForBatchTokenId(tokenId);
        if (tcc == address(0)) revert(Errors.COB_TCC_NOT_FOUND);
        string memory registry = ICarbonCoreCarbonOffsets(tcc).standardRegistry();
        if (!supportedRegistries[registry])
            revert(Errors.COB_REGISTRY_NOT_SUPPORTED);
        uint256 balanceBefore = IERC20Upgradeable(tcc).balanceOf(
            address(this)
        );

        // Fractionalize by transferring the batch-NFT to the TCC contract.
        _safeTransfer(address(this), tcc, tokenId, '');

        // Check that TCCs were minted
        uint256 balanceAfter = IERC20Upgradeable(tcc).balanceOf(address(this));
        uint256 amount = balanceAfter - balanceBefore;

        //slither-disable-next-line incorrect-equality
        if (amount == 0) revert(Errors.COB_NO_TCC_MINTED);

        // Transfer minted TCCs to recipient.
        IERC20Upgradeable(tcc).safeTransfer(recipient, amount);
        emit Tokenized(tokenId, tcc, recipient, amount);
    }

    /// @notice Split a batch-NFT into two batch-NFTs, by creating a new batch-NFT and updating the old one.
    /// The old batch will have a new serial number and quantity will be reduced by the quantity of the new batch.
    /// @dev Callable only by the escrow contract, only for batches with status
    /// RetirementRequested or DetokenizationRequested. The TCC contract will also be the owner of the new batch and
    /// its status will be the same as the old batch.
    /// @param tokenId The token ID of the batch to split
    /// @param newTokenIdQuantity The quantity for the new batch, must be smaller than the old quantity and greater
    /// than 0
    /// @return newTokenId The token ID of the new batch
    function split(
        uint256 tokenId,
        uint256 newTokenIdQuantity
    ) external returns (uint256 newTokenId) {
        onlyUnpaused();
        onlyEscrow();

        string memory serialNumber = nftList[tokenId].serialNumber;

        //address tcc = _getTCCForBatchTokenId(tokenId);
        address tcc = ownerOf(tokenId);
        if (tcc == address(0)) revert(Errors.COB_TCC_NOT_FOUND);

        (
            string memory newTokenIdSerialNumber,
            string memory tokenIdNewSerialNumber
        ) = ICarbonCoreCarbonOffsets(tcc).splitSerialNumber(serialNumber, newTokenIdQuantity);


        if (!ICarbonCoreContractRegistry(contractRegistry).isValidERC20(tcc))
            revert(Errors.COB_INVALID_BATCH_OWNER);
        // Validate batch status
        BatchStatus status = nftList[tokenId].status;
        if (
            status != BatchStatus.RetirementRequested &&
            status != BatchStatus.DetokenizationRequested
        ) revert(Errors.COB_INVALID_STATUS);
        // Validate batch quantity
        if (nftList[tokenId].quantity <= newTokenIdQuantity)
            revert(Errors.COB_INVALID_QUANTITY);

        // keep old serial number to be able to unapprove it after checking and approving the new ones
        string memory oldSerialNumber = nftList[tokenId].serialNumber;
        // this also performs the check that the new quantity is smaller than the old quantity, otherwise it would
        // underflow and revert. in case it is equal to the old quantity, _updateSerialAndQuantity would revert on
        // quantity == 0
        _updateSerialAndQuantity(
            tokenId,
            tokenIdNewSerialNumber,
            nftList[tokenId].quantity - newTokenIdQuantity
        );
        serialNumberApproved[tokenIdNewSerialNumber] = true;

        // mint a new batch to be owned by the TCC contract
        newTokenId = _mintEmptyBatch(address(this), tcc);
        _updateSerialAndQuantity(
            newTokenId,
            newTokenIdSerialNumber,
            newTokenIdQuantity
        ); // here we would revert in case newTokenIdQuantity == 0
        serialNumberApproved[newTokenIdSerialNumber] = true;

        // unapprove the old serial number
        serialNumberApproved[oldSerialNumber] = false;

        // link the new batch with the vintage of the old batch
        _linkWithVintage(newTokenId, nftList[tokenId].projectVintageTokenId);
        ICarbonIndexer( ICarbonCoreContractRegistry(contractRegistry).carbonIndexerAddress() ).addMintedBatch(nftList[tokenId].projectVintageTokenId, newTokenId);

        // Copy the status from the old batch
        _updateStatus(newTokenId, status);

        // transfer new batch to TCC contract with the right status so that
        // it will not be fractionalized
        _safeTransfer(address(this), tcc, newTokenId, '');

        emit Split(tokenId, newTokenId);
    }

    function onERC721Received(
        address, /* operator */
        address from, /* from */
        uint256, /* tokenId */
        bytes calldata /* data */
    ) external pure returns (bytes4) {
        // This hook is only used by the contract to mint batch-NFTs that
        // can be tokenized on behalf of end users.
        if (from != address(0)) revert(Errors.COB_ONLY_MINTS);
        return this.onERC721Received.selector;
    }
}

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

pragma solidity ^0.8.0;

import "./IAccessControlUpgradeable.sol";
import "../utils/ContextUpgradeable.sol";
import "../utils/StringsUpgradeable.sol";
import "../utils/introspection/ERC165Upgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    function __AccessControl_init() internal onlyInitializing {
    }

    function __AccessControl_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        StringsUpgradeable.toHexString(account),
                        " is missing role ",
                        StringsUpgradeable.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }

    /**
     * @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 v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControlUpgradeable {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// 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 v4.5.0) (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 IERC1822ProxiableUpgradeable {
    /**
     * @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) (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 IERC1967Upgradeable {
    /**
     * @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 v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeaconUpgradeable {
    /**
     * @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) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../interfaces/IERC1967Upgradeable.sol";
import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import {Initializable} from "../utils/Initializable.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 ERC1967UpgradeUpgradeable is Initializable, IERC1967Upgradeable {
    // 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;

    function __ERC1967Upgrade_init() internal onlyInitializing {
    }

    function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlotUpgradeable.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) {
            AddressUpgradeable.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 (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822ProxiableUpgradeable(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 StorageSlotUpgradeable.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");
        StorageSlotUpgradeable.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 StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlotUpgradeable.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) {
            AddressUpgradeable.functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
        }
    }

    /**
     * @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) (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
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import {Initializable} from "./Initializable.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 Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
    /// @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");
        _;
    }

    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /**
     * @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;

    /**
     * @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 v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

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

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    function __Pausable_init() internal onlyInitializing {
        __Pausable_init_unchained();
    }

    function __Pausable_init_unchained() internal onlyInitializing {
        _paused = false;
    }

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

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

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

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

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

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

    /**
     * @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 v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20PermitUpgradeable {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20Upgradeable {
    using AddressUpgradeable for address;

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

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

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20Upgradeable token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

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

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

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

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

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20PermitUpgradeable token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20Upgradeable token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20Upgradeable token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "./IERC721Upgradeable.sol";
import "./IERC721ReceiverUpgradeable.sol";
import "./extensions/IERC721MetadataUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/ContextUpgradeable.sol";
import "../../utils/StringsUpgradeable.sol";
import "../../utils/introspection/ERC165Upgradeable.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721Upgradeable, IERC721MetadataUpgradeable {
    using AddressUpgradeable for address;
    using StringsUpgradeable for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    function __ERC721_init(string memory name_, string memory symbol_) internal onlyInitializing {
        __ERC721_init_unchained(name_, symbol_);
    }

    function __ERC721_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
        return
            interfaceId == type(IERC721Upgradeable).interfaceId ||
            interfaceId == type(IERC721MetadataUpgradeable).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: address zero is not a valid owner");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _ownerOf(tokenId);
        require(owner != address(0), "ERC721: invalid token ID");
        return owner;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        _requireMinted(tokenId);

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overridden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721Upgradeable.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not token owner or approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        _requireMinted(tokenId);

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(address from, address to, uint256 tokenId) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");

        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");
        _safeTransfer(from, to, tokenId, data);
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * `data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
     */
    function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
        return _owners[tokenId];
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _ownerOf(tokenId) != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        address owner = ERC721Upgradeable.ownerOf(tokenId);
        return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {
        _mint(to, tokenId);
        require(
            _checkOnERC721Received(address(0), to, tokenId, data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId, 1);

        // Check that tokenId was not minted by `_beforeTokenTransfer` hook
        require(!_exists(tokenId), "ERC721: token already minted");

        unchecked {
            // Will not overflow unless all 2**256 token ids are minted to the same owner.
            // Given that tokens are minted one by one, it is impossible in practice that
            // this ever happens. Might change if we allow batch minting.
            // The ERC fails to describe this case.
            _balances[to] += 1;
        }

        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);

        _afterTokenTransfer(address(0), to, tokenId, 1);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     * This is an internal function that does not check if the sender is authorized to operate on the token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721Upgradeable.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId, 1);

        // Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook
        owner = ERC721Upgradeable.ownerOf(tokenId);

        // Clear approvals
        delete _tokenApprovals[tokenId];

        unchecked {
            // Cannot overflow, as that would require more tokens to be burned/transferred
            // out than the owner initially received through minting and transferring in.
            _balances[owner] -= 1;
        }
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);

        _afterTokenTransfer(owner, address(0), tokenId, 1);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(address from, address to, uint256 tokenId) internal virtual {
        require(ERC721Upgradeable.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId, 1);

        // Check that tokenId was not transferred by `_beforeTokenTransfer` hook
        require(ERC721Upgradeable.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");

        // Clear approvals from the previous owner
        delete _tokenApprovals[tokenId];

        unchecked {
            // `_balances[from]` cannot overflow for the same reason as described in `_burn`:
            // `from`'s balance is the number of token held, which is at least one before the current
            // transfer.
            // `_balances[to]` could overflow in the conditions described in `_mint`. That would require
            // all 2**256 token ids to be minted, which in practice is impossible.
            _balances[from] -= 1;
            _balances[to] += 1;
        }
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        _afterTokenTransfer(from, to, tokenId, 1);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits an {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721Upgradeable.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits an {ApprovalForAll} event.
     */
    function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Reverts if the `tokenId` has not been minted yet.
     */
    function _requireMinted(uint256 tokenId) internal view virtual {
        require(_exists(tokenId), "ERC721: invalid token ID");
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721ReceiverUpgradeable(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
                return retval == IERC721ReceiverUpgradeable.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    /// @solidity memory-safe-assembly
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting and burning. If {ERC721Consecutive} is
     * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`.
     * - When `from` is zero, the tokens will be minted for `to`.
     * - When `to` is zero, ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     * - `batchSize` is non-zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {}

    /**
     * @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is
     * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`.
     * - When `from` is zero, the tokens were minted for `to`.
     * - When `to` is zero, ``from``'s tokens were burned.
     * - `from` and `to` are never both zero.
     * - `batchSize` is non-zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {}

    /**
     * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
     *
     * WARNING: Anyone calling this MUST ensure that the balances remain consistent with the ownership. The invariant
     * being that for any address `a` the value returned by `balanceOf(a)` must be equal to the number of tokens such
     * that `ownerOf(tokenId)` is `a`.
     */
    // solhint-disable-next-line func-name-mixedcase
    function __unsafe_increaseBalance(address account, uint256 amount) internal {
        _balances[account] += amount;
    }

    /**
     * @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[44] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/extensions/ERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../ERC721Upgradeable.sol";
import "./IERC721EnumerableUpgradeable.sol";
import {Initializable} from "../../../proxy/utils/Initializable.sol";

/**
 * @dev This implements an optional extension of {ERC721} defined in the EIP that adds
 * enumerability of all the token ids in the contract as well as all token ids owned by each
 * account.
 */
abstract contract ERC721EnumerableUpgradeable is Initializable, ERC721Upgradeable, IERC721EnumerableUpgradeable {
    // Mapping from owner to list of owned token IDs
    mapping(address => mapping(uint256 => uint256)) private _ownedTokens;

    // Mapping from token ID to index of the owner tokens list
    mapping(uint256 => uint256) private _ownedTokensIndex;

    // Array with all token ids, used for enumeration
    uint256[] private _allTokens;

    // Mapping from token id to position in the allTokens array
    mapping(uint256 => uint256) private _allTokensIndex;

    function __ERC721Enumerable_init() internal onlyInitializing {
    }

    function __ERC721Enumerable_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165Upgradeable, ERC721Upgradeable) returns (bool) {
        return interfaceId == type(IERC721EnumerableUpgradeable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721Upgradeable.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
        return _ownedTokens[owner][index];
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _allTokens.length;
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721EnumerableUpgradeable.totalSupply(), "ERC721Enumerable: global index out of bounds");
        return _allTokens[index];
    }

    /**
     * @dev See {ERC721-_beforeTokenTransfer}.
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 firstTokenId,
        uint256 batchSize
    ) internal virtual override {
        super._beforeTokenTransfer(from, to, firstTokenId, batchSize);

        if (batchSize > 1) {
            // Will only trigger during construction. Batch transferring (minting) is not available afterwards.
            revert("ERC721Enumerable: consecutive transfers not supported");
        }

        uint256 tokenId = firstTokenId;

        if (from == address(0)) {
            _addTokenToAllTokensEnumeration(tokenId);
        } else if (from != to) {
            _removeTokenFromOwnerEnumeration(from, tokenId);
        }
        if (to == address(0)) {
            _removeTokenFromAllTokensEnumeration(tokenId);
        } else if (to != from) {
            _addTokenToOwnerEnumeration(to, tokenId);
        }
    }

    /**
     * @dev Private function to add a token to this extension's ownership-tracking data structures.
     * @param to address representing the new owner of the given token ID
     * @param tokenId uint256 ID of the token to be added to the tokens list of the given address
     */
    function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
        uint256 length = ERC721Upgradeable.balanceOf(to);
        _ownedTokens[to][length] = tokenId;
        _ownedTokensIndex[tokenId] = length;
    }

    /**
     * @dev Private function to add a token to this extension's token tracking data structures.
     * @param tokenId uint256 ID of the token to be added to the tokens list
     */
    function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
        _allTokensIndex[tokenId] = _allTokens.length;
        _allTokens.push(tokenId);
    }

    /**
     * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
     * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
     * gas optimizations e.g. when performing a transfer operation (avoiding double writes).
     * This has O(1) time complexity, but alters the order of the _ownedTokens array.
     * @param from address representing the previous owner of the given token ID
     * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
     */
    function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
        // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = ERC721Upgradeable.balanceOf(from) - 1;
        uint256 tokenIndex = _ownedTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary
        if (tokenIndex != lastTokenIndex) {
            uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];

            _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
            _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
        }

        // This also deletes the contents at the last position of the array
        delete _ownedTokensIndex[tokenId];
        delete _ownedTokens[from][lastTokenIndex];
    }

    /**
     * @dev Private function to remove a token from this extension's token tracking data structures.
     * This has O(1) time complexity, but alters the order of the _allTokens array.
     * @param tokenId uint256 ID of the token to be removed from the tokens list
     */
    function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
        // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = _allTokens.length - 1;
        uint256 tokenIndex = _allTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
        // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
        // an 'if' statement (like in _removeTokenFromOwnerEnumeration)
        uint256 lastTokenId = _allTokens[lastTokenIndex];

        _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
        _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index

        // This also deletes the contents at the last position of the array
        delete _allTokensIndex[tokenId];
        _allTokens.pop();
    }

    /**
     * @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[46] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721Upgradeable.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721EnumerableUpgradeable is IERC721Upgradeable {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721Upgradeable.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

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

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721ReceiverUpgradeable {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165Upgradeable.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721Upgradeable is IERC165Upgradeable {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// 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 v4.9.4) (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 v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165Upgradeable.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
    function __ERC165_init() internal onlyInitializing {
    }

    function __ERC165_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165Upgradeable).interfaceId;
    }

    /**
     * @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 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 IERC165Upgradeable {
    /**
     * @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 (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library MathUpgradeable {
    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 SignedMathUpgradeable {
    /**
     * @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);
        }
    }
}

// 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 StorageSlotUpgradeable {
    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 v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/MathUpgradeable.sol";
import "./math/SignedMathUpgradeable.sol";

/**
 * @dev String operations.
 */
library StringsUpgradeable {
    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 = MathUpgradeable.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(SignedMathUpgradeable.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, MathUpgradeable.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-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth

pragma solidity ^0.8.14;


struct Batch {
    uint256 id;
    uint256 amount; // available amount in this batch (full batch amount as stored)
}

struct Request {
    uint256 requestId;
    bool isRetirement;
}    

struct BatchUsage {
    uint256 tokenId; 
    uint256 amount; //amount used
    uint256 total; //amount in batch
    string serialNumber;
}

struct BatchSelection {
    BatchUsage[] batches;
    BatchUsage lastBatch;
    uint256 amount; // amount requested to detokenize or retire
}

// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity ^0.8.14;


import {DetokenizationRequest} from '../../../CarbonCoreCarbonOffsetsEscrowTypes.sol';
import {Batch, Request, BatchSelection} from "./CarbonIndexerTypes.sol";

interface ICarbonIndexer {
    function updateUserTCCHolding(address user, address tcc, uint256 newBalance) external;
    function addBatchToVintage(uint256 tokenId) external;
    function removeBatchFromVintage(uint256 tokenId) external;
    function updateBucketForNewAmount(uint256 tokenId) external;
    function resolveAmountByBatches(uint256 vintageId, uint256 requested/*normalized amount*/) external view returns (BatchSelection memory);
    function addMintedBatch(uint256 vintageId, uint256 batchId) external;

    function addBatchSyncronization(string memory registry, uint256 requestId, bool isRetirement) external; 
    function removeBatchSyncronization(string memory registry, uint256 requestId, bool isRetirement) external; 
    function getNextBachSyncronization(string memory registry) external view returns (Request memory);
    function contractRegistry() external view returns(address);

}

// SPDX-FileCopyrightText: 2023 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

import './carboncore/indexers/main/CarbonIndexerTypes.sol';

struct DetokenizationRequest {
    address user;
    RequestStatus status;
    BatchSelection batchSelection;
    uint256[] revertedBatchIds;
    uint256 revertedBatchesAmount;

    uint256 projectVintageTokenId;
}

struct RetirementRequest {
    address user;
    RequestStatus status;
    // The request may optionally be associated with one or more batches.
    // This may need to be limited to one batch for registries which don't
    // support atomic retirement of multiple batches in one go, since
    // retiring one batch at a time might create a situation where our
    // RetirementRequest is only partially fulfilled, and then we would be
    // stuck with no way forwards and no way to roll back.
    BatchSelection batchSelection;
    uint256[] revertedBatchIds;
    uint256 revertedBatchesAmount;


    // Optional
    string retiringEntityString;
    // Optional
    address beneficiary;
    // Optional
    string beneficiaryString;
    // Optional
    string retirementMessage;
    // Optional
    string beneficiaryLocation;
    // Optional
    string consumptionCountryCode;
    // Optional
    uint256 consumptionPeriodStart;
    // Optional
    uint256 consumptionPeriodEnd;
    uint256 projectVintageTokenId;
}

enum RequestStatus {
    Pending,
    Finalized,
    Reverted
}

// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.8.14;

import {BatchStatus} from './CarbonOffsetBatchesTypes.sol';

/// @dev Separate storage contract to improve upgrade safety
abstract contract CarbonOffsetBatchesStorageV1 {
    uint256 public batchTokenCounter;
    /// @custom:oz-upgrades-renamed-from serialNumberExist
    mapping(string => bool) public serialNumberApproved;
    mapping(string => bool) private DEPRECATED_URIs;
    mapping(address => bool) private DEPRECATED_VERIFIERS;

    string internal baseURI;
    address public contractRegistry;

    struct NFTData {
        uint256 projectVintageTokenId;
        string serialNumber;
        uint256 quantity;
        BatchStatus status;
        string uri;
        string[] comments;
        address[] commentAuthors;
    }

    mapping(uint256 => NFTData) public nftList;
}

abstract contract CarbonOffsetBatchesStorageV2 {
    mapping(string => bool) internal supportedRegistries;
}

abstract contract CarbonOffsetBatchesStorage is
    CarbonOffsetBatchesStorageV1,
    CarbonOffsetBatchesStorageV2
{}

// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth

pragma solidity 0.8.14;

enum BatchStatus {
    Pending, // 0
    Rejected, // 1
    Confirmed, // 2
    DetokenizationRequested, // 3
    DetokenizationFinalized, // 4
    RetirementRequested, // 5
    RetirementFinalized // 6
}

// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth

pragma solidity 0.8.14;

/// @dev CarbonProject related data and attributes
struct ProjectData {
    string projectId;
    string standard;
    string methodology;
    string region;
    string storageMethod;
    string method;
    string emissionType;
    string category;
    string uri;
    address beneficiary;
}

// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth

pragma solidity 0.8.14;

struct VintageData {
    /// @dev A human-readable string which differentiates this from other vintages in
    /// the same project, and helps build the corresponding TCC name and symbol.
    string name;
    uint64 startTime; // UNIX timestamp
    uint64 endTime; // UNIX timestamp
    uint256 projectTokenId;
    uint64 totalVintageQuantity;
    bool isCorsiaCompliant;
    bool isCCPcompliant;
    string coBenefits;
    string correspAdjustment;
    string additionalCertification;
    string uri;
    string registry;
}

// SPDX-FileCopyrightText: 2022 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

import {VintageData} from '../CarbonProjectVintageTypes.sol';
import {ProjectData} from '../CarbonProjectTypes.sol';
import {CreateRetirementRequestParams} from '../interfaces/ICarbonCoreCarbonOffsetsEscrow.sol';
import {BatchSelection} from "../carboncore/indexers/main/CarbonIndexerTypes.sol";

interface ICarbonCoreCarbonOffsets {
    function retireFrom(address account, uint256 amount)
        external
        returns (uint256 retirementEventId);

    function burnFrom(address account, uint256 amount) external;

    function getAttributes()
        external
        view
        returns (ProjectData memory, VintageData memory);

    /// @notice Get the vintage data of the TCC
    function getVintageData()
        external
        view
        returns (VintageData memory vintageData);

    function standardRegistry() external view returns (string memory);

    function retireAndMintCertificate(
        string calldata retiringEntityString,
        address beneficiary,
        string calldata beneficiaryString,
        string calldata retirementMessage,
        uint256 amount
    ) external;

    function retireAndMintCertificateForEntity(
        address retiringEntity,
        uint256 amount, /*decimals*/
        uint256[] memory batchIds,
        CreateRetirementRequestParams calldata params
    ) external;

    function projectVintageTokenId() external view returns (uint256);


    function splitSerialNumber(string calldata serialNumber, uint256 amount)
        external
        pure
        returns (
            string memory balancingSerialNumber,
            string memory remainingSerialNumber
        );    
}

// SPDX-FileCopyrightText: 2023 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

import {DetokenizationRequest, RetirementRequest, RequestStatus} from '../CarbonCoreCarbonOffsetsEscrowTypes.sol';
import {BatchSelection} from "../carboncore/indexers/main/CarbonIndexerTypes.sol";

struct CreateRetirementRequestParams {
    string retiringEntityString;
    address beneficiary;
    string beneficiaryString;
    string retirementMessage;
    string beneficiaryLocation;
    string consumptionCountryCode;
    uint256 consumptionPeriodStart;
    uint256 consumptionPeriodEnd;
}

interface ICarbonCoreCarbonOffsetsEscrow {
    function createDetokenizationRequest(
        address user,
        BatchSelection memory batchSelection
    ) external returns (uint256);

    function createRetirementRequest(
        address user,
        BatchSelection memory batchSelection,
        CreateRetirementRequestParams calldata params
    ) external returns (uint256);

    function finalizeDetokenizationRequest(uint256 requestId, uint256 succededBatchesNum) external;

    function finalizeRetirementRequest(uint256 requestId, uint256 succededBatchesNum) external;

    function revertDetokenizationRequest(uint256 requestId) external;

    function revertRetirementRequest(uint256 requestId) external;

    function detokenizationRequests(uint256 requestId)
        external
        view
        returns (DetokenizationRequest memory);

    function retirementRequests(uint256 requestId)
        external
        view
        returns (RetirementRequest memory);
}

// SPDX-FileCopyrightText: 2022 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

import '@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol';

interface ICarbonCoreCarbonOffsetsFactory is IAccessControlUpgradeable {
    function bridgeFeeReceiverAddress()
        external
        view
        returns (address receiver);

    function bridgeFeeBurnAddress() external view returns (address burner);

    function getBridgeFeeAndBurnAmount(uint256 quantity)
        external
        view
        returns (uint256 feeAmount, uint256 burnAmount);

    function allowedBridges(address user) external view returns (bool);

    function owner() external view returns (address);

    function standardRegistry() external returns (string memory);

    function pvIdtoERC20(uint256 pvId) external view returns (address);
}

// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

interface ICarbonCoreContractRegistry {
    function carbonOffsetBatchesAddress() external view returns (address);

    function carbonProjectsAddress() external view returns (address);

    function carbonProjectVintagesAddress() external view returns (address);
    
    function carbonIndexerAddress() external view returns (address);

    function carbonPoolsIndexerAddress() external view returns (address);

    function carboncoreCarbonOffsetsFactoryAddress(string memory standardRegistry)
        external
        view
        returns (address);

    function retirementCertificatesAddress() external view returns (address);

    function carboncoreCarbonOffsetsEscrowAddress() external view returns (address);

    function retirementCertificateFractionalizerAddress()
        external
        view
        returns (address);

    function retirementCertificateFractionsAddress()
        external
        view
        returns (address);

    function isValidERC20(address erc20) external view returns (bool);

    function addERC20(address erc20, string memory standardRegistry) external;

    
}

// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

import {BatchStatus} from '../CarbonOffsetBatchesTypes.sol';

interface ICarbonOffsetBatches {
    function getConfirmationStatus(uint256 tokenId)
        external
        view
        returns (BatchStatus);

    function getSerialNumber(uint256 tokenId)
        external
        view
        returns (string memory);

    function getBatchNFTData(uint256 tokenId)
        external
        view
        returns (
            uint256,
            uint256,/*normalized amount*/
            BatchStatus
        );
        
    function setStatusForDetokenizationOrRetirement(
        uint256 tokenId,
        BatchStatus newStatus
    ) external;

    function split(
        uint256 tokenId,
        uint256 newTokenIdQuantity
    ) external returns (uint256);
}

// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

import '@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol';

import {VintageData} from '../CarbonProjectVintageTypes.sol';

interface ICarbonProjectVintages is IERC721Upgradeable {
    function addNewVintage(address to, VintageData memory _vintageData)
        external
        returns (uint256);

    function exists(uint256 tokenId) external view returns (bool);

    function getProjectVintageDataByTokenId(uint256 tokenId)
        external
        view
        returns (VintageData memory);
}

// SPDX-FileCopyrightText: 2022 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

/**
 * @title Errors library
 * @notice Defines the error messages emitted by the different contracts of the CarbonCore protocol
 * @dev Inspired by the AAVE error library:
 * https://github.com/aave/protocol-v2/blob/5df59ec74a0c635d877dc1c5ee4a165d41488352/contracts/protocol/libraries/helpers/Errors.sol
 * Error messages prefix glossary:
 *  - CP = CarbonPool
 *  - COB = CarbonOffsetBatches
 *  - TCC = TCC
 */
library Errors {
    // User is not authorized
    string public constant CP_UNAUTHORIZED = '1';
    // Empty array provided as input
    string public constant CP_EMPTY_ARRAY = '2';
    // Pool is full of TCCs
    string public constant CP_FULL_POOL = '3';
    // ERC20 is blocklisted in the pool. This error
    // is returned for TCCs that have been blocklisted
    // like the HFC-23 project.
    string public constant CP_BLOCKLISTED = '4';
    // ERC20 is not allowlisted in the pool
    // This error is returned in case the ERC20 is
    // not a TCC in which case it has to be manually
    // allowlisted in order to be allowed in the pool.
    string public constant CP_NOT_ALLOWLISTED = '5';
    // Vintage start time of a TCC is too old
    string public constant CP_START_TIME_TOO_OLD = '6';
    string public constant CP_REGION_NOT_ACCEPTED = '7';
    string public constant CP_STANDARD_NOT_ACCEPTED = '8';
    string public constant CP_METHODOLOGY_NOT_ACCEPTED = '9';
    // Provided fee is invalid, not in a basis points format: [0,10000)
    string public constant CP_INVALID_FEE = '10';
    // Provided address needs to be non-zero
    string public constant CP_EMPTY_ADDRESS = '11';
    // Validation check to ensure array lengths match
    string public constant CP_LENGTH_MISMATCH = '12';
    // TCC not exempted from redeem fees
    string public constant CP_NOT_EXEMPTED = '13';
    // A contract has been paused
    string public constant CP_PAUSED_CONTRACT = '14';
    // Redemption has leftover unredeemed value
    string public constant CP_NON_ZERO_REMAINING = '15';
    // Redemption exceeds deposited TCC supply
    string public constant CP_EXCEEDS_TCC_SUPPLY = '16';
    // User must be a router
    string public constant CP_ONLY_ROUTER = '17';
    // User must be the owner
    string public constant CP_ONLY_OWNER = '18';
    // Zero destination address is invalid for pool token transfers
    string public constant CP_INVALID_DESTINATION_ZERO = '19';
    // Self destination address is invalid for pool token transfers
    string public constant CP_INVALID_DESTINATION_SELF = '20';
    // Zero amount provided as an input (eg., in redemptions) in invalid
    string public constant CP_ZERO_AMOUNT = '21';
    // ERC20 is not eligible to be pooled
    string public constant CP_NOT_ELIGIBLE = '22';
    // Carbon registry is already supported in COB
    string public constant COB_ALREADY_SUPPORTED = '23';
    // The caller is not granted the VERIFIER_ROLE in COB
    string public constant COB_NOT_VERIFIER_OR_BATCH_OWNER = '24';
    // The caller does not own the provided batch
    string public constant COB_NOT_BATCH_OWNER = '25';
    // The owner of the batch is invalid (not a TCC contract)
    string public constant COB_INVALID_BATCH_OWNER = '26';
    // The batch is not in Confirmed status
    string public constant COB_NOT_CONFIRMED = '27';
    // The batch is not in a requested status (DetokenizationRequested or RetirementRequested)
    string public constant COB_NOT_REQUESTED_STATUS = '28';
    // The batch does not exist
    string public constant COB_NOT_EXISTS = '29';
    // The batch has an invalid status based on the action requested
    string public constant COB_INVALID_STATUS = '30';
    // The batch is missing an associated project vintage
    string public constant COB_MISSING_VINTAGE = '31';
    // The serial number in the batch is already approved
    string public constant COB_ALREADY_APPROVED = '32';
    // The batch is not in Pending status
    string public constant COB_NOT_PENDING = '33';
    // The batch is already fractionalized
    string public constant COB_ALREADY_FRACTIONALIZED = '34';
    // The batch is not in Rejected status
    string public constant COB_NOT_REJECTED = '35';
    // The project vintage is already set in the batch
    string public constant COB_VINTAGE_ALREADY_SET = '36';
    // The transfer is not approved
    string public constant COB_TRANSFER_NOT_APPROVED = '37';
    // The COB contract is paused
    string public constant COB_PAUSED_CONTRACT = '38';
    // The caller is invalid
    string public constant COB_INVALID_CALLER = '39';
    // The TCC for the batch is not found
    string public constant COB_TCC_NOT_FOUND = '40';
    // The registry for the provided vintage is not supported
    string public constant COB_REGISTRY_NOT_SUPPORTED = '41';
    // No TCC was minted as part of tokenization
    string public constant COB_NO_TCC_MINTED = '42';
    // Only mints are supported for the batch contract to receive an NFT
    string public constant COB_ONLY_MINTS = '43';
    // New batch status is invalid
    string public constant COB_INVALID_NEW_STATUS = '44';
    // The TCC batch amount is invalid
    string public constant TCC_BATCH_AMT_INVALID = '45';
    // The TCC batch amount approval has failed
    string public constant TCC_APPROVAL_AMT_FAILED = '46';
    // The TCC batch not confirmed
    string public constant TCC_BATCH_NOT_CONFIRMED = '47';
    // The TCC batch not whitelisted
    string public constant TCC_BATCH_NOT_WHITELISTED = '48';
    // The TCC is non matching NFT
    string public constant TCC_NON_MATCHING_NFT = '49';
    // The TCC Quantity in batch is higher than total vintages
    string public constant TCC_QTY_HIGHER = '50';
    // The fee to be charged is too high
    string public constant CP_FEE_TOO_HIGH = '51';
    // The max fee to be paid is invalid
    string public constant CP_INVALID_MAX_FEE = '52';
    // The pool feature is not supported
    string public constant CP_NOT_SUPPORTED = '53';
    // Used for instance to check for sub-tonnage retirement requests
    string public constant TCC_INVALID_DECIMALS = '54';
    // The TCC Quantity in the batch is invalid
    string public constant COB_INVALID_QUANTITY = '55';
    // Splitting is required on detokenization/retirement finalization, but 2 new serial numbers
    // were not provided
    string public constant TCC_MISSING_SERIALS = '56';
    // The score set for the ERC-1155 token in the pool is invalid
    string public constant INVALID_ERC1155_SCORE = '57';
    // The score of the ERC-1155 token in the pool is not set
    string public constant EMPTY_ERC155_SCORE = '58';
    // The underlying decimals are too high for the pool
    string public constant UNDERLYING_DECIMALS_TOO_HIGH = '59';
    // The provided supply cap is invalid and should match the underlying token decimals
    // eg., for an ERC-1155 token whose smallest denomination is tonnes, the pool supply
    // cap should not include decimals of lower fidelity than tonnes.
    string public constant INVALID_SUPPLY_CAP = '60';
}

// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

contract Modifiers {
    modifier onlyBy(address _contractRegistry, address _owner) {
        require(
            _contractRegistry == msg.sender || _owner == msg.sender,
            'Caller is not the registry, nor owner'
        );
        _;
    }
}

// SPDX-FileCopyrightText: 2021 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

import '../interfaces/ICarbonCoreContractRegistry.sol';
import '../interfaces/ICarbonProjectVintages.sol';

contract ProjectVintageUtils {
    function checkProjectVintageTokenExists(
        address contractRegistry,
        uint256 tokenId
    ) internal virtual {
        address c = ICarbonCoreContractRegistry(contractRegistry)
            .carbonProjectVintagesAddress();
        require(
            ICarbonProjectVintages(c).exists(tokenId),
            'Carbon project vintage does not yet exist'
        );
    }
}

// SPDX-FileCopyrightText: 2023 CarbonCore Labs
//
// SPDX-License-Identifier: UNLICENSED

// If you encounter a vulnerability or an issue, please contact <[email protected]> or visit security.carboncore.earth
pragma solidity 0.8.14;

import '@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol';

library Strings {
    /// @notice Compare two strings
    /// @param a The string to compare
    /// @param b The string to compare to
    /// @return True if the strings are equal, false otherwise
    function equals(string memory a, string memory b)
        internal
        pure
        returns (bool)
    {
        return
            (bytes(a).length == bytes(b).length) &&
            (keccak256(bytes(a)) == keccak256(bytes(b)));
    }

    /// @notice Convert a string to an integer
    /// @param numString The string to convert
    /// @return The integer value of the string
    function toInteger(string memory numString)
        internal
        pure
        returns (uint256)
    {
        uint256 val = 0;
        bytes memory stringBytes = bytes(numString);
        uint256 stringBytesLen = stringBytes.length;
        for (uint256 i = 0; i < stringBytesLen; ++i) {
            uint256 exp = stringBytesLen - i;
            bytes1 ival = stringBytes[i];
            uint8 uval = uint8(ival);
            uint256 jval = uval - uint256(0x30);

            val += (uint256(jval) * (10**(exp - 1)));
        }
        return val;
    }

    /// @notice Convert an integer to a string
    /// @param value The integer to convert
    /// @return The string value of the integer
    function toString(uint256 value) internal pure returns (string memory) {
        return StringsUpgradeable.toString(value);
    }

    /// @notice Get a substring of a string
    /// @param text The string to get a substring from
    /// @param begin The start index of the substring
    /// @param end The end index of the substring
    /// @return The substring
    function slice(
        string memory text,
        uint256 begin,
        uint256 end
    ) internal pure returns (string memory) {
        uint256 length = end - begin;
        bytes memory a = new bytes(length);
        for (uint256 i = 0; i < length; ++i) {
            a[i] = bytes(text)[i + begin];
        }
        return string(a);
    }

    /// @notice Pad a string with a character
    /// @param text The string to pad
    /// @param length The length to pad to
    /// @param padChar The character to pad with
    /// @return The padded string
    function pad(
        string memory text,
        uint256 length,
        string memory padChar
    ) internal pure returns (string memory) {
        uint256 textLen = bytes(text).length;
        require(bytes(padChar).length == 1, 'Invalid padChar length');
        require(length >= textLen, 'Invalid text length');

        for (uint256 i = textLen; i < length; ++i) {
            text = string.concat(padChar, text);
        }

        return text;
    }

    /// @notice Count the occurrences of a character in a string
    /// @param text The string to count occurrences of char in
    /// @param char The character to count
    /// @return nums The number of occurrences
    function count(string memory text, string memory char)
        internal
        pure
        returns (uint256 nums)
    {
        require(bytes(char).length == 1, 'Invalid char length');
        bytes1 c = bytes(char)[0];

        uint256 textLen = bytes(text).length;
        for (uint256 i = 0; i < textLen; ++i) {
            if (bytes(text)[i] == c) {
                ++nums;
            }
        }
    }

    /// @notice Split a string into two parts. The first occurrence of the delimiter
    /// is used to split the string into first and last.
    /// @param text The string to split
    /// @param delimiter The character to split on
    /// @return first last The two parts of the string
    function split(string memory text, string memory delimiter, uint256 occur)
        internal
        pure
        returns (string memory first, string memory last)
    {
        uint256  num = 0;
        if (occur == 0) occur = 1;
        require(bytes(delimiter).length == 1, 'Invalid delimiter length');
        bytes1 d = bytes(delimiter)[0];

        uint256 textLen = bytes(text).length;
        for (uint256 i = 0; i < textLen; ++i) {
            if (bytes(text)[i] == d) num ++;

            if (num == occur) {
                first = slice(text, 0, i);
                last = slice(text, i + 1, textLen);
                return (first, last);
            }
        }
    }

    function split(string memory text, string memory delimiter)
        internal
        pure
        returns (string memory first, string memory last)
    {
        return split(text, delimiter, 1);
    }    
}

{
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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BatchStatus","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getConfirmationStatus","outputs":[{"internalType":"enum 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