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// SPDX-License-Identifier: MIT
/**
 _____
/  __ \
| /  \/ ___  _ ____   _____ _ __ __ _  ___ _ __   ___ ___
| |    / _ \| '_ \ \ / / _ \ '__/ _` |/ _ \ '_ \ / __/ _ \
| \__/\ (_) | | | \ V /  __/ | | (_| |  __/ | | | (_|  __/
 \____/\___/|_| |_|\_/ \___|_|  \__, |\___|_| |_|\___\___|
                                 __/ |
                                |___/
 */

/// @title Cvg-Finance - SdtStakingPositionManager
/// @notice This contract is an ERC721 contract tokenizing the Staking Positions.
/// @dev    When an user stakes in an SdtStakingPositionService contract, it mints an NFT through this contract.
pragma solidity ^0.8.0;

import "../../Token/CvgERC721TimeLockingUpgradeable.sol";
import "../../interfaces/ICvgControlTower.sol";

contract SdtStakingPositionManager is CvgERC721TimeLockingUpgradeable {
    struct TokenStaking {
        address stakingContract;
        uint256 tokenId;
    }

    /// @dev Convergence control tower
    ICvgControlTower public cvgControlTower;

    /// @dev Staking, allows to reconstruct a dynamic image from a template registered onchain
    ISdtStakingLogo internal logo;

    /// @dev Base URI of the NFT
    string internal baseURI;

    /// @notice Id of the next Staking Position to be minted
    uint256 public nextId;

    /// @dev Staking address per tokenId
    mapping(uint256 => address) public stakingPerTokenId;

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

    /** @dev Initialize function of the Staking position manager
     *  @param _cvgControlTower   Address of the Cvg Control tower
     */
    function initialize(ICvgControlTower _cvgControlTower) external initializer {
        cvgControlTower = _cvgControlTower;
        /// @dev Initialize the NFT contract
        __ERC721_init("Staking Positions Convergence", "STK-CVG");
        _transferOwnership(msg.sender);
        /// @dev Initialize first token ID as 1
        nextId = 1;
        /// @dev Timelocking maximum is initialized at 10 days.
        maxLockingTime = 10 days;
    }

    /**
     * @dev Verifies the full compliance of a token. Checked during withdraw & claim.
     *      Checks that the transaction is done from the staking contract linked to the token ID.
     *      Checks that the position is owned by the account.
     *      Checks that the token is not timelocked.
     *  @param tokenId of the staking position
     * @param receiver Receiver address of the operation
     */
    function checkTokenFullCompliance(uint256 tokenId, address receiver) external view {
        /// @dev Verify that receiver is always the NFT owner
        require(receiver == ownerOf(tokenId), "TOKEN_NOT_OWNED");
        /// @dev As the StakingPositionManager is the NFT contract, we verify that this ID has been created from this StakingPositionService
        require(msg.sender == stakingPerTokenId[tokenId], "WRONG_STAKING");
        /// @dev We verify that the tokenId is not timelocked
        require(unlockingTimestampPerToken[tokenId] < block.timestamp, "TOKEN_TIMELOCKED");
    }

    /**
     * @dev Verifies the compliance of a position to increase the deposit amount on it.
     *      Checks that the transaction is done from the staking contract linked to the token ID.
     *      Checks that the position is owned by the account.
     * @param tokenId of the staking position
     * @param receiver Receiver address of the Staking Position NFT
     */
    function checkIncreaseDepositCompliance(uint256 tokenId, address receiver) external view {
        /// @dev Verify that receiver is always the NFT owner
        require(receiver == ownerOf(tokenId), "TOKEN_NOT_OWNED");
        /// @dev As the StakingPositionManager is the NFT contract, we verify that this ID has been created from this StakingPositionService
        require(msg.sender == stakingPerTokenId[tokenId], "WRONG_STAKING");
    }

    /**
     * @notice Verifies that the input of the claimMultiple on the SdtRewardDistributor is correct.
     * @dev    Checks if a group of staking position, sorted by contract are compliant with the account.
     *         Checks that each Staking position is owned by the account.
     *         Checks that each Staking position is linked to the staking contract.
     *         Checks that each Staking position is not Timelocked.
     * @param claimInput Array of staking position sorted by staking service to check compliance on.
     * @param receiver Receiver address of the ERC20 rewards from staking
     */
    function checkMultipleClaimCompliance(
        ISdtStakingPositionManager.ClaimSdtStakingContract[] calldata claimInput,
        address receiver
    ) external view {
        /// @dev Loop over Staking Contracts
        for (uint256 i; i < claimInput.length; ) {
            /// @dev Loop over Token Ids
            for (uint256 j; j < claimInput[i].tokenIds.length; ) {
                uint256 tokenId = claimInput[i].tokenIds[j];
                /// @dev Verify that receiver is always the NFT owner
                require(receiver == ownerOf(tokenId), "TOKEN_NOT_OWNED");
                /// @dev As the StakingPositionManager is the NFT contract, we verify that this ID has been created from this StakingPositionService
                require(address(claimInput[i].stakingContract) == stakingPerTokenId[tokenId], "WRONG_STAKING");
                /// @dev We verify that the tokenId is not timelocked
                require(unlockingTimestampPerToken[tokenId] < block.timestamp, "TOKEN_TIMELOCKED");
                unchecked {
                    ++j;
                }
            }
            unchecked {
                ++i;
            }
        }
    }

    /** @dev This function is only callable by a StakingContract.
     *       Mints an NFT to the user and link the tokenId with the corresponding StakingPositionService.
     *  @param account Receiver of the minted NFT
     */
    function mint(address account) external {
        /// @dev Verify that caller is a StakingContract
        require(cvgControlTower.isStakingContract(msg.sender), "NOT_STAKING");
        /// @dev Increments the nextId
        uint256 tokenId = nextId++;
        /// @dev Link the minted token with the StakingService
        stakingPerTokenId[tokenId] = msg.sender;
        /// @dev Mints the token
        _mint(account, tokenId);
    }

    /** @notice Burns an NFT linked to a Staking position.
     *          An NFT cannot be burnt if the position still have asset staked.
     *  @param _tokenId Token ID of the NFT to burn.
     */
    function burn(uint256 _tokenId) external onlyNftOwner(_tokenId) {
        require(
            ISdtStakingPositionService(stakingPerTokenId[_tokenId]).tokenTotalStaked(_tokenId) == 0,
            "TOTAL_STAKED_NOT_EMPTY"
        );
        _burn(_tokenId);
    }

    /* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
                            URI & LOGO
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-= */

    /**
     * @notice Set the logo contract.
     * @param _logo the new logo contract
     */
    function setLogo(ISdtStakingLogo _logo) external onlyOwner {
        logo = _logo;
    }

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

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

    /** @notice Returns basic URI or SVG encoded in Base64 if logo contract is set.
     *  @param tokenId TokenId of the SVG encoded SVG to return.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        ISdtStakingLogo _logo = logo;

        if (address(_logo) == address(0)) {
            string memory uri = _baseURI();
            return bytes(uri).length != 0 ? string(abi.encodePacked(uri, Strings.toString(tokenId))) : "";
        }

        return _logo._tokenURI(logoInfo(tokenId));
    }

    /** @notice Return the information displayed in the dynamic on chain image.
     *  @param tokenId ID of the token to fetch information from
     */
    function logoInfo(uint256 tokenId) public view returns (ISdtStakingLogo.LogoInfos memory) {
        _requireMinted(tokenId);

        ISdtStakingPositionService.StakingInfo memory stakingInfo = ISdtStakingPositionService(
            stakingPerTokenId[tokenId]
        ).stakingInfo(tokenId);

        return
            ISdtStakingLogo.LogoInfos({
                tokenId: stakingInfo.tokenId,
                symbol: stakingInfo.symbol,
                pending: stakingInfo.pending,
                totalStaked: stakingInfo.totalStaked,
                cvgClaimable: stakingInfo.cvgClaimable,
                sdtClaimable: stakingInfo.sdtClaimable,
                unlockingTimestamp: unlockingTimestampPerToken[tokenId]
            });
    }

    /** @notice Return an array of all NFT owned by an account and the StakingPositionService linked to each.
     *  @param account Account owning the returned tokenIds.
     */
    function getTokenIdsAndStakingContracts(address account) external view returns (TokenStaking[] memory) {
        uint256[] memory tokenIds = getTokenIdsForWallet(account);
        uint256 length = tokenIds.length;
        TokenStaking[] memory tokenAddresses = new TokenStaking[](length);
        for (uint256 index = 0; index < length; ) {
            tokenAddresses[index] = TokenStaking({
                stakingContract: stakingPerTokenId[tokenIds[index]],
                tokenId: tokenIds[index]
            });

            unchecked {
                ++index;
            }
        }

        return tokenAddresses;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface AggregatorV3Interface {
  function decimals() external view returns (uint8);

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

  function version() external view returns (uint256);

  function getRoundData(
    uint80 _roundId
  ) external view returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);

  function latestRoundData()
    external
    view
    returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}

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

pragma solidity ^0.8.0;

import "./OwnableUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {
    function __Ownable2Step_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable2Step_init_unchained() internal onlyInitializing {
    }
    address private _pendingOwner;

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

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

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

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

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

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

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

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

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

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

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// 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 "../../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 "../../../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 {
    function __ERC721Enumerable_init() internal onlyInitializing {
    }

    function __ERC721Enumerable_init_unchained() internal onlyInitializing {
    }
    // 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;

    /**
     * @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 v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;
import "../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;
    }

    /**
     * @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 "../../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/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-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../token/ERC20/extensions/IERC20Metadata.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

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

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

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

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @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 (last updated v4.9.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @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 v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./IBondStruct.sol";

interface IBondCalculator {
    function computeRoi(
        uint256 durationFromStart,
        uint256 totalDuration,
        IBondStruct.BondFunction composedFunction,
        uint256 totalTokenOut,
        uint256 amountTokenSold,
        uint256 gamma,
        uint256 scale,
        uint256 minRoi,
        uint256 maxRoi
    ) external pure returns (uint256 bondRoi);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./ICvgControlTower.sol";
import "./IBondStruct.sol";
import "./ICvgOracle.sol";

interface IBondDepository {
    // Deposit Principle token in Treasury through Bond contract
    function deposit(uint256 tokenId, uint256 amount, address receiver) external;

    function depositToLock(uint256 amount, address receiver) external returns (uint256 cvgToMint);

    function positionInfos(uint256 tokenId) external view returns (IBondStruct.BondPending memory);

    function getTokenVestingInfo(uint256 tokenId) external view returns (IBondStruct.TokenVestingInfo memory);

    function bondParams() external view returns (IBondStruct.BondParams memory);

    function pendingPayoutFor(uint256 tokenId) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;

interface IBondLogo {
    struct LogoInfos {
        uint256 tokenId;
        uint256 termTimestamp;
        uint256 pending;
        uint256 cvgClaimable;
        uint256 unlockingTimestamp;
    }
    struct LogoInfosFull {
        uint256 tokenId;
        uint256 termTimestamp;
        uint256 pending;
        uint256 cvgClaimable;
        uint256 unlockingTimestamp;
        uint256 year;
        uint256 month;
        uint256 day;
        bool isLocked;
        uint256 hoursLock;
        uint256 cvgPrice;
    }

    function _tokenURI(LogoInfos memory logoInfos) external pure returns (string memory output);

    
    function getLogoInfo(uint256 tokenId) external view returns (IBondLogo.LogoInfosFull memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./IBondStruct.sol";
import "./IBondLogo.sol";
import "./IBondDepository.sol";

interface IBondPositionManager {
    function bondDepository() external view returns (IBondDepository);

    function getTokenIdsForWallet(address _wallet) external view returns (uint256[] memory);

    function bondPerTokenId(uint256 tokenId) external view returns (uint256);

    // Deposit Principle token in Treasury through Bond contract
    function mintOrCheck(uint256 bondId, uint256 tokenId, address receiver) external returns (uint256);

    function burn(uint256 tokenId) external;

    function unlockingTimestampPerToken(uint256 tokenId) external view returns (uint256);

    function logoInfo(uint256 tokenId) external view returns (IBondLogo.LogoInfos memory);

    function checkTokenRedeem(uint256[] calldata tokenIds, address receiver) external view;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IBondStruct {
    /* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
                        STORED STRUCTS
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-= */
    struct BondParams {
        /**
         * @dev Type of function used to compute the actual ROI of a bond.
         *      - 0 is SquareRoot
         *      - 1 is Ln
         *      - 2 is Square
         *      - 3 is Linear
         */
        BondFunction composedFunction;
        /// @dev Address of the underlaying token of the bond.
        address token;
        /**
         * @dev Gamma is used in the BondCalculator.It's the value dividing the ratio between the amount already sold and the theorical amount sold.
         *      250_000 correspond to 0.25 (25%).
         */
        uint40 gamma;
        /// @dev Total duration of the bond, uint40 is enough for a timestamp.
        uint40 bondDuration;
        /// @dev Determine if a Bond is paused. Can't deposit on a bond paused.
        bool isPaused;
        /**
         * @dev Scale is used in the BondCalculator. When a scale is A, the ROI vary by incremental of A.
         *      If scale is 5_000 correspond to 0.5%, the ROI will vary from the maxROI to minROI by increment of 0.5%.
         */
        uint32 scale;
        /**
         * @dev Minimum ROI of the bond. Discount cannot be less than the minROI.
         *      If minRoi is 100_000, it represents 10%.
         */

        uint24 minRoi;
        /**
         * @dev Maximum ROI of the bond. Discount cannot be more than the maxROI.
         *      If maxRoi is 150_000, it represents 15%.
         */
        uint24 maxRoi;
        /**
         * @dev Percentage maximum of the cvgToSell that an user can buy in one deposit
         *      If percentageOneTx is 200, it represents 20% of cvgToSell.
         */
        uint24 percentageOneTx;
        /// @dev Duration of the vesting in second.
        uint32 vestingTerm;
        /**
         * @dev Maximum amount that can be bought through this bond.
         *      uint80 represents 1.2M tokens in ethers. It means that we are never going to open a bond with more than 1.2M tokens.
         */
        uint80 cvgToSell; // Limit of Max CVG to sell => 1.2M CVG max approx
        /// @dev Timestamp in second of the beginning of the bond. Has to be in the future.
        uint40 startBondTimestamp;
    }
    struct BondPending {
        /// @dev Timestamp in second of the last interaction with this position.
        uint64 lastTimestamp;
        /// @dev Time in seconds lefting before the position is fully unvested
        uint64 vestingTimeLeft;
        /**
         * @dev Total amount of CVG still vested in the position.
         *      uint128 is way enough because it's an amount in CVG that have a max supply of 150M tokens.
         */
        uint128 leftClaimable;
    }

    enum BondFunction {
        SQRT,
        LN,
        POWER_2,
        LINEAR
    }

    /* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
                        VIEW STRUCTS
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-= */
    struct BondTokenView {
        uint128 lastTimestamp;
        uint128 vestingEnd;
        uint256 claimableCvg;
        uint256 leftClaimable;
    }

    struct BondView {
        uint256 actualRoi;
        uint256 cvgAlreadySold;
        uint256 usdExecutionPrice;
        uint256 usdLimitPrice;
        uint256 assetBondPrice;
        uint256 usdBondPrice;
        bool isOracleValid;
        BondParams bondParameters;
        ERC20View token;
    }
    struct ERC20View {
        string token;
        address tokenAddress;
        uint256 decimals;
    }
    struct TokenVestingInfo {
        uint256 term;
        uint256 claimable;
        uint256 pending;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface ICommonStruct {
    struct TokenAmount {
        IERC20 token;
        uint256 amount;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/interfaces/IERC20Metadata.sol";

interface ICvg is IERC20Metadata {
    function MAX_AIRDROP() external view returns (uint256);

    function MAX_BOND() external view returns (uint256);

    function MAX_STAKING() external view returns (uint256);

    function MAX_VESTING() external view returns (uint256);

    function allowance(address owner, address spender) external view returns (uint256);

    function approve(address spender, uint256 amount) external returns (bool);

    function balanceOf(address account) external view returns (uint256);

    function burn(uint256 amount) external;

    function cvgControlTower() external view returns (address);

    function decimals() external view returns (uint8);

    function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool);

    function increaseAllowance(address spender, uint256 addedValue) external returns (bool);

    function mintBond(address account, uint256 amount) external;

    function mintStaking(address account, uint256 amount) external;

    function mintedBond() external view returns (uint256);

    function mintedStaking() external view returns (uint256);

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

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

    function totalSupply() external view returns (uint256);

    function transfer(address to, uint256 amount) external returns (bool);

    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

import "./IERC20Mintable.sol";
import "./ICvg.sol";
import "./IBondDepository.sol";
import "./IBondCalculator.sol";
import "./IBondStruct.sol";
import "./ICvgOracle.sol";
import "./IVotingPowerEscrow.sol";
import "./ICvgRewards.sol";
import "./ILockingPositionManager.sol";
import "./ILockingPositionDelegate.sol";
import "./IGaugeController.sol";
import "./IYsDistributor.sol";
import "./IBondPositionManager.sol";
import "./ISdtStakingPositionManager.sol";
import "./IBondLogo.sol";
import "./ILockingLogo.sol";
import "./ILockingPositionService.sol";
import "./IVestingCvg.sol";
import "./ISdtBuffer.sol";
import "./ISdtBlackHole.sol";
import "./ISdtStakingPositionService.sol";
import "./ISdtFeeCollector.sol";
import "./ISdtBuffer.sol";
import "./ISdtRewardDistributor.sol";

interface ICvgControlTower {
    function cvgToken() external view returns (ICvg);

    function cvgOracle() external view returns (ICvgOracle);

    function bondCalculator() external view returns (IBondCalculator);

    function gaugeController() external view returns (IGaugeController);

    function cvgCycle() external view returns (uint128);

    function votingPowerEscrow() external view returns (IVotingPowerEscrow);

    function treasuryDao() external view returns (address);

    function treasuryPod() external view returns (address);

    function treasuryPdd() external view returns (address);

    function treasuryAirdrop() external view returns (address);

    function treasuryTeam() external view returns (address);

    function cvgRewards() external view returns (ICvgRewards);

    function lockingPositionManager() external view returns (ILockingPositionManager);

    function lockingPositionService() external view returns (ILockingPositionService);

    function lockingPositionDelegate() external view returns (ILockingPositionDelegate);

    function isStakingContract(address contractAddress) external view returns (bool);

    function ysDistributor() external view returns (IYsDistributor);

    function isBond(address account) external view returns (bool);

    function bondPositionManager() external view returns (IBondPositionManager);

    function sdtStakingPositionManager() external view returns (ISdtStakingPositionManager);

    function sdtStakingLogo() external view returns (ISdtStakingLogo);

    function bondLogo() external view returns (IBondLogo);

    function lockingLogo() external view returns (ILockingLogo);

    function isSdtStaking(address contractAddress) external view returns (bool);

    function vestingCvg() external view returns (IVestingCvg);

    function sdt() external view returns (IERC20);

    function cvgSDT() external view returns (IERC20Mintable);

    function cvgSdtStaking() external view returns (ISdtStakingPositionService);

    function cvgSdtBuffer() external view returns (ISdtBuffer);

    function veSdtMultisig() external view returns (address);

    function cloneFactory() external view returns (address);

    function sdtUtilities() external view returns (address);

    function insertNewSdtStaking(address _sdtStakingClone) external;

    function allBaseSdAssetStaking(uint256 _index) external view returns (address);

    function allBaseSdAssetBuffer(uint256 _index) external view returns (address);

    function sdtFeeCollector() external view returns (ISdtFeeCollector);

    function updateCvgCycle() external;

    function sdtBlackHole() external view returns (ISdtBlackHole);

    function sdtRewardDistributor() external view returns (address);

    function poolCvgSdt() external view returns (address);

    function bondDepository() external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "./IOracleStruct.sol";

interface ICvgOracle {
    function getPriceVerified(address erc20) external view returns (uint256);

    function getPriceUnverified(address erc20) external view returns (uint256);

    function getAndVerifyTwoPrices(address tokenIn, address tokenOut) external view returns (uint256, uint256);

    function getTwoPricesAndIsValid(
        address tokenIn,
        address tokenOut
    ) external view returns (uint256, uint256, bool, uint256, uint256, bool);

    function getPriceAndValidationData(
        address erc20Address
    ) external view returns (uint256, uint256, bool, bool, bool, bool);

    function getPoolAddressByToken(address erc20) external view returns (address);

    function poolTypePerErc20(address) external view returns (IOracleStruct.PoolType);

    //OWNER

    function setPoolTypeForToken(address _erc20Address, IOracleStruct.PoolType _poolType) external;

    function setStableParams(address _erc20Address, IOracleStruct.StableParams calldata _stableParams) external;

    function setCurveDuoParams(address _erc20Address, IOracleStruct.CurveDuoParams calldata _curveDuoParams) external;

    function setCurveTriParams(address _erc20Address, IOracleStruct.CurveTriParams calldata _curveTriParams) external;

    function setUniV3Params(address _erc20Address, IOracleStruct.UniV3Params calldata _uniV3Params) external;

    function setUniV2Params(address _erc20Address, IOracleStruct.UniV2Params calldata _uniV2Params) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface ICvgRewards {
    function cvgCycleRewards() external view returns (uint256);

    function addGauge(address gaugeAddress) external;

    function removeGauge(address gaugeAddress) external;

    function getCycleLocking(uint256 timestamp) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/interfaces/IERC20Metadata.sol";

/**
 * @dev Interface for the optional mint function from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Mintable is IERC20Metadata {
    /**
     * @dev Mint `amount` of token to `account`
     */
    function mint(address account, uint256 amount) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IGaugeController {
    struct WeightType {
        uint256 weight;
        uint256 type_weight;
        int128 gauge_type;
    }

    function add_type(string memory typeName, uint256 weight) external;

    function add_gauge(address addr, int128 gaugeType, uint256 weight) external;

    function get_gauge_weight(address gaugeAddress) external view returns (uint256);

    function get_gauge_weights(address[] memory gaugeAddresses) external view returns (uint256[] memory, uint256);

    function get_gauge_weights_and_types(address[] memory gaugeAddresses) external view returns (WeightType[] memory);

    function get_total_weight() external view returns (uint256);

    function n_gauges() external view returns (uint128);

    function gauges(uint256 index) external view returns (address);

    function gauge_types(address gaugeAddress) external view returns (int128);

    function get_type_weight(int128 typeId) external view returns (uint256);

    function gauge_relative_weight(address addr, uint256 time) external view returns (uint256);

    function set_lock(bool isLock) external;

    function gauge_relative_weight_write(address gaugeAddress) external;

    function gauge_relative_weight_writes(uint256 from, uint256 length) external;

    function simple_vote(uint256 tokenId, address gaugeAddress, uint256 tokenWeight) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface ILockingLogo {
    struct LogoInfos {
        uint256 tokenId;
        uint256 cvgLocked;
        uint256 lockEnd;
        uint256 ysPercentage;
        uint256 mgCvg;
        uint256 unlockingTimestamp;
    }
    struct GaugePosition {
        uint256 ysWidth; // width of the YS gauge part
        uint256 veWidth; // width of the VE gauge part
    }

    struct LogoInfosFull {
        uint256 tokenId;
        uint256 cvgLocked;
        uint256 lockEnd;
        uint256 ysPercentage;
        uint256 mgCvg;
        uint256 unlockingTimestamp;
        uint256 cvgLockedInUsd;
        uint256 ysCvgActual;
        uint256 ysCvgNext;
        uint256 veCvg;
        GaugePosition gaugePosition;
        uint256 claimableInUsd;
        bool isLocked;
        uint256 hoursLock;
    }

    function _tokenURI(LogoInfos memory logoInfos) external pure returns (string memory output);

    function getLogoInfo(uint256 tokenId) external view returns (ILockingLogo.LogoInfosFull memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface ILockingPositionDelegate {
    struct OwnedAndDelegated {
        uint256[] owneds;
        uint256[] mgDelegateds;
        uint256[] veDelegateds;
    }

    function delegatedYsCvg(uint256 tokenId) external view returns (address);

    function getMgDelegateeInfoPerTokenAndAddress(
        uint256 _tokenId,
        address _to
    ) external view returns (uint256, uint256, uint256);

    function getIndexForVeDelegatee(address _delegatee, uint256 _tokenId) external view returns (uint256);

    function getIndexForMgCvgDelegatee(address _delegatee, uint256 _tokenId) external view returns (uint256);

    function delegateVeCvg(uint256 _tokenId, address _to) external;

    function delegateYsCvg(uint256 _tokenId, address _to, bool _status) external;

    function delegateMgCvg(uint256 _tokenId, address _to, uint256 _percentage) external;

    function delegatedVeCvg(uint256 tokenId) external view returns (address);

    function getVeCvgDelegatees(address account) external view returns (uint256[] memory);

    function getMgCvgDelegatees(address account) external view returns (uint256[] memory);

    function getTokenOwnedAndDelegated(address _addr) external view returns (OwnedAndDelegated[] memory);

    function getTokenMgOwnedAndDelegated(address _addr) external view returns (uint256[] memory, uint256[] memory);

    function getTokenVeOwnedAndDelegated(address _addr) external view returns (uint256[] memory, uint256[] memory);

    function addTokenAtMint(uint256 _tokenId, address minter) external;

    function cleanDelegateesOnTransfer(uint256 _tokenId) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./ILockingLogo.sol";

interface ILockingPositionManager {
    function ownerOf(uint256 tokenId) external view returns (address);

    function mint(address account) external returns (uint256);

    function burn(uint256 tokenId, address caller) external;

    function logoInfo(uint256 tokenId) external view returns (ILockingLogo.LogoInfos memory);

    function checkYsClaim(uint256 tokenId, address caller) external view;

    function checkOwnership(uint256 _tokenId, address operator) external view;

    function checkOwnerships(uint256[] memory _tokenIds, address operator) external view;

    function checkFullCompliance(uint256 tokenId, address operator) external view;

    function getTokenIdsForWallet(address _wallet) external view returns (uint256[] memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface ILockingPositionService {
    /* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
                        STORED STRUCTS
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-= */
    struct LockingPosition {
        /// @dev Starting cycle of a LockingPosition. Maximum value of uint24 is 16M, so 16M weeks is way enough.
        uint24 startCycle;
        /// @dev End cycle of a LockingPosition. Maximum value of uint24 is 16M, so 16M weeks is way enough.
        uint24 lastEndCycle;
        /** @dev Percentage of the token allocated to ysCvg. Amount dedicated to vote is so equal to 100 - ysPercentage.
         *  A position with ysPercentage as 60 will allocate 60% of his locking to YsCvg and 40% to veCvg and mgCvg.
         */
        uint8 ysPercentage;
        /** @dev Total Cvg amount locked in the position.
         *  Max supply of CVG is 150M, it so fits into an uint104 (20 000 billions approx).
         */
        uint104 totalCvgLocked;
        /**  @dev MgCvgAmount held by the position.
         *   Max supply of mgCVG is 150M, it so fits into an uint96 (20 billions approx).
         */
        uint96 mgCvgAmount;
    }

    struct TrackingBalance {
        /** @dev Amount of ysCvg to add to the total supply when the corresponding cvgCycle is triggered.
         *  Max supply of ysCVG is 150M, it so fits into an uint128.
         */
        uint128 ysToAdd;
        /** @dev Amount of ysCvg to remove from the total supply when the corresponding cvgCycle is triggered.
         *  Max supply of ysCVG is 150M, it so fits into an uint128.
         */
        uint128 ysToSub;
    }

    struct Checkpoints {
        uint24 cycleId;
        uint232 ysBalance;
    }

    /* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
                        VIEW STRUCTS
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-= */

    struct TokenView {
        uint256 tokenId;
        uint128 startCycle;
        uint128 endCycle;
        uint256 cvgLocked;
        uint256 ysActual;
        uint256 ysTotal;
        uint256 veCvgActual;
        uint256 mgCvg;
        uint256 ysPercentage;
    }

    struct LockingInfo {
        uint256 tokenId;
        uint256 cvgLocked;
        uint256 lockEnd;
        uint256 ysPercentage;
        uint256 mgCvg;
    }

    function TDE_DURATION() external view returns (uint256);

    function MAX_LOCK() external view returns (uint24);

    function updateYsTotalSupply() external;

    function ysTotalSupplyHistory(uint256) external view returns (uint256);

    function ysShareOnTokenAtTde(uint256, uint256) external view returns (uint256);

    function veCvgVotingPowerPerAddress(address _user) external view returns (uint256);

    function mintPosition(
        uint24 lockDuration,
        uint128 amount,
        uint8 ysPercentage,
        address receiver,
        bool isAddToManagedTokens
    ) external;

    function increaseLockAmount(uint256 tokenId, uint128 amount, address operator) external;

    function increaseLockTime(uint256 tokenId, uint256 durationAdd) external;

    function increaseLockTimeAndAmount(uint256 tokenId, uint24 durationAdd, uint128 amount, address operator) external;

    function totalSupplyYsCvgHistories(uint256 cycleClaimed) external view returns (uint256);

    function balanceOfYsCvgAt(uint256 tokenId, uint256 cycle) external view returns (uint256);

    function lockingPositions(uint256 tokenId) external view returns (LockingPosition memory);

    function unlockingTimestampPerToken(uint256 tokenId) external view returns (uint256);

    function lockingInfo(uint256 tokenId) external view returns (LockingInfo memory);

    function isContractLocker(address contractAddress) external view returns (bool);

    function getTotalSupplyAtAndBalanceOfYs(uint256 tokenId, uint256 cycleId) external view returns (uint256, uint256);

    function getTotalSupplyHistoryAndBalanceOfYs(
        uint256 tokenId,
        uint256 cycleId
    ) external view returns (uint256, uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";

interface IOracleStruct {
    enum PoolType {
        NOT_INIT,
        STABLE,
        CURVE_DUO,
        CURVE_TRI,
        UNI_V3,
        UNI_V2
    }

    struct StableParams {
        AggregatorV3Interface aggregatorOracle;
        uint40 deltaLimitOracle; // 5 % => 500 & 100 % => 10 000
        uint56 maxLastUpdate; // Buffer time before a not updated price is considered as stale
        uint128 minPrice;
        uint128 maxPrice;
    }

    struct CurveDuoParams {
        bool isReversed;
        bool isEthPriceRelated;
        address poolAddress;
        uint40 deltaLimitOracle; // 5 % => 500 & 100 % => 10 000
        uint40 maxLastUpdate; // Buffer time before a not updated price is considered as stale
        uint128 minPrice;
        uint128 maxPrice;
        address[] stablesToCheck;
    }

    struct CurveTriParams {
        bool isReversed;
        bool isEthPriceRelated;
        address poolAddress;
        uint40 deltaLimitOracle;
        uint40 maxLastUpdate;
        uint8 k;
        uint120 minPrice;
        uint128 maxPrice;
        address[] stablesToCheck;
    }

    struct UniV2Params {
        bool isReversed;
        bool isEthPriceRelated;
        address poolAddress;
        uint80 deltaLimitOracle;
        uint96 maxLastUpdate;
        AggregatorV3Interface aggregatorOracle;
        uint128 minPrice;
        uint128 maxPrice;
        address[] stablesToCheck;
    }

    struct UniV3Params {
        bool isReversed;
        bool isEthPriceRelated;
        address poolAddress;
        uint80 deltaLimitOracle;
        uint80 maxLastUpdate;
        uint16 twap;
        AggregatorV3Interface aggregatorOracle;
        uint128 minPrice;
        uint128 maxPrice;
        address[] stablesToCheck;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";

interface IPresaleCvgSeed is IERC721Enumerable {
    /* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
                            ENUMS & STRUCTS
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-= */
    enum SaleState {
        NOT_ACTIVE,
        PRESEED,
        SEED,
        OVER
    }

    struct PresaleInfo {
        uint256 vestingType; // Define the presaler type
        uint256 cvgAmount; // Total CVG amount claimable for the nft owner
    }

    /* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
                            SETTERS
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-= */
    function setSaleState(SaleState _saleState) external;

    function grantPreseed(address _wallet, uint256 _amount) external;

    function grantSeed(address _wallet, uint256 _amount) external;

    /* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
                            EXTERNALS
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-= */
    function investMint(bool _isDai) external;

    /* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
                            GETTERS
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-= */
    function presaleInfoTokenId(uint256 _tokenId) external view returns (PresaleInfo memory);

    function saleState() external view returns (SaleState);

    function tokenOfOwnerByIndex(address owner, uint256 index) external view override returns (uint256);

    function getTokenIdAndType(
        address _wallet,
        uint256 _index
    ) external view returns (uint256 tokenId, uint256 typeVesting);

    function getTokenIdsForWallet(address _wallet) external view returns (uint256[] memory);

    function getTotalCvg() external view returns (uint256);

    /* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
                        WITHDRAW OWNER
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-= */
    function withdrawFunds() external;

    function withdrawToken(address _token) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
import "./ICvgControlTower.sol";
import "./ISdtBuffer.sol";

interface IOperator {
    function token() external view returns (IERC20Metadata);

    function deposit(uint256 amount, bool isLock, bool isStake, address receiver) external;
}

interface ISdAsset is IERC20Metadata {
    function sdAssetGauge() external view returns (IERC20);

    function initialize(
        ICvgControlTower _cvgControlTower,
        IERC20 _sdAssetGauge,
        string memory setName,
        string memory setSymbol
    ) external;

    function setSdAssetBuffer(address _sdAssetBuffer) external;

    function mint(address to, uint256 amount) external;

    function operator() external view returns (IOperator);
}

interface ISdAssetGauge is IERC20Metadata {
    function deposit(uint256 value, address addr) external;

    function deposit(uint256 value, address addr, bool claimRewards) external;

    function staking_token() external view returns (IERC20);

    function reward_count() external view returns (uint256);

    function reward_tokens(uint256 i) external view returns (IERC20);

    function claim_rewards(address account) external;

    function set_rewards_receiver(address account) external;

    function claimable_reward(address account, address token) external view returns (uint256);

    function set_reward_distributor(address rewardToken, address distributor) external;

    function deposit_reward_token(address rewardToken, uint256 amount) external;

    function admin() external view returns (address);

    function working_balances(address) external view returns (uint256);

    function working_supply() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./ICommonStruct.sol";

interface ISdtBlackHole {
    function withdraw(uint256 amount, address receiver) external;

    function setGaugeReceiver(address gaugeAddress, address bufferReceiver) external;

    function getBribeTokensForBuffer(address buffer) external view returns (IERC20[] memory);

    function pullSdStakingBribes(
        address _processor,
        uint256 _processorRewardsPercentage
    ) external returns (ICommonStruct.TokenAmount[] memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./ICvgControlTower.sol";

import "./ISdAssets.sol";

import "./ICommonStruct.sol";

interface ISdtBuffer {
    function initialize(
        ICvgControlTower _cvgControlTower,
        address _sdAssetStaking,
        ISdAssetGauge _sdGaugeAsset,
        IERC20 _sdt
    ) external;

    function pullRewards(address _processor) external returns (ICommonStruct.TokenAmount[] memory);

    function processorRewardsPercentage() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface ISdtFeeCollector {
    function rootFees() external returns (uint256);

    function withdrawToken(IERC20[] calldata _tokens) external;

    function withdrawSdt() external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./ICommonStruct.sol";

interface ISdtRewardDistributor {
    function claimCvgSdtSimple(
        address receiver,
        uint256 cvgAmount,
        ICommonStruct.TokenAmount[] memory sdtRewards,
        uint256 minCvgSdtAmountOut,
        bool isConvert
    ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./ICommonStruct.sol";

interface ISdtStakingLogo {
    struct LogoInfos {
        uint256 tokenId;
        string symbol;
        uint256 pending;
        uint256 totalStaked;
        uint256 cvgClaimable;
        ICommonStruct.TokenAmount[] sdtClaimable;
        uint256 unlockingTimestamp;
    }

    struct LogoInfosFull {
        uint256 tokenId;
        string symbol;
        uint256 pending;
        uint256 totalStaked;
        uint256 cvgClaimable;
        ICommonStruct.TokenAmount[] sdtClaimable;
        uint256 unlockingTimestamp;
        uint256 claimableInUsd;
        bool erroneousAmount;
        bool isLocked;
        uint256 hoursLock;
    }

    function _tokenURI(LogoInfos memory logoInfos) external pure returns (string memory output);

    function getLogoInfo(uint256 tokenId) external view returns (ISdtStakingLogo.LogoInfosFull memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./ISdtStakingLogo.sol";
import "./ISdtStakingPositionService.sol";

interface ISdtStakingPositionManager {
    struct ClaimSdtStakingContract {
        ISdtStakingPositionService stakingContract;
        uint256[] tokenIds;
    }

    function mint(address account) external;

    function burn(uint256 tokenId) external;

    function nextId() external view returns (uint256);

    function ownerOf(uint256 tokenId) external view returns (address);

    function checkMultipleClaimCompliance(ClaimSdtStakingContract[] calldata, address account) external view;

    function checkTokenFullCompliance(uint256 tokenId, address account) external view;

    function checkIncreaseDepositCompliance(uint256 tokenId, address account) external view;

    function stakingPerTokenId(uint256 tokenId) external view returns (address);

    function unlockingTimestampPerToken(uint256 tokenId) external view returns (uint256);

    function logoInfo(uint256 tokenId) external view returns (ISdtStakingLogo.LogoInfos memory);

    function getTokenIdsForWallet(address _wallet) external view returns (uint256[] memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "./ICommonStruct.sol";
import "./ISdtBuffer.sol";

interface ISdtStakingPositionService {
    struct CycleInfo {
        uint256 cvgRewardsAmount;
        uint256 totalStaked;
        bool isSdtProcessed;
    }

    struct TokenInfo {
        uint256 amountStaked;
        uint256 pendingStaked;
    }
    struct CycleInfoMultiple {
        uint256 totalStaked;
        ICommonStruct.TokenAmount[] sdtClaimable;
    }
    struct StakingInfo {
        uint256 tokenId;
        string symbol;
        uint256 pending;
        uint256 totalStaked;
        uint256 cvgClaimable;
        ICommonStruct.TokenAmount[] sdtClaimable;
    }

    function setBuffer(address _buffer) external;

    function stakingCycle() external view returns (uint256);

    function cycleInfo(uint256 cycleId) external view returns (CycleInfo memory);

    function stakingAsset() external view returns (ISdAssetGauge);

    function buffer() external view returns (ISdtBuffer);

    function tokenTotalStaked(uint256 _tokenId) external view returns (uint256 amount);

    function stakedAmountEligibleAtCycle(
        uint256 cvgCycle,
        uint256 tokenId,
        uint256 actualCycle
    ) external view returns (uint256);

    function tokenInfoByCycle(uint256 cycleId, uint256 tokenId) external view returns (TokenInfo memory);

    function stakingInfo(uint256 tokenId) external view returns (StakingInfo memory);

    function getProcessedSdtRewards(uint256 _cycleId) external view returns (ICommonStruct.TokenAmount[] memory);

    function deposit(uint256 tokenId, uint256 amount, address operator) external;

    function claimCvgSdtMultiple(
        uint256 _tokenId,
        address operator
    ) external returns (uint256, ICommonStruct.TokenAmount[] memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IPresaleCvgSeed.sol";

interface IVestingCvg {
    /// @dev Struct Info about VestingSchedules
    struct VestingSchedule {
        uint16 daysBeforeCliff;
        uint16 daysAfterCliff;
        uint24 dropCliff;
        uint256 totalAmount;
        uint256 totalReleased;
    }

    struct InfoVestingTokenId {
        uint256 amountReleasable;
        uint256 totalCvg;
        uint256 amountRedeemed;
    }

    enum VestingType {
        SEED,
        WL,
        IBO,
        TEAM,
        DAO
    }

    function vestingSchedules(VestingType vestingType) external view returns (VestingSchedule memory);

    function getInfoVestingTokenId(
        uint256 _tokenId,
        VestingType vestingType
    ) external view returns (InfoVestingTokenId memory);

    function whitelistedTeam() external view returns (address);

    function presaleSeed() external view returns (IPresaleCvgSeed);

    function MAX_SUPPLY_TEAM() external view returns (uint256);

    function startTimestamp() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IVotingPowerEscrow {
    function create_lock(uint256 tokenId, uint256 value, uint256 unlockTime) external;

    function increase_amount(uint256 tokenId, uint256 value) external;

    function increase_unlock_time(uint256 tokenId, uint256 unlockTime) external;

    function increase_unlock_time_and_amount(uint256 tokenId, uint256 unlockTime, uint256 amount) external;

    function withdraw(uint256 tokenId) external;

    function total_supply() external returns (uint256);

    function balanceOf(uint256 tokenId) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./ICommonStruct.sol";

interface IYsDistributor {
    struct TokenAmount {
        IERC20 token;
        uint96 amount;
    }

    struct Claim {
        uint256 tdeCycle;
        bool isClaimed;
        TokenAmount[] tokenAmounts;
    }

    function getPositionRewardsForTdes(
        uint256[] calldata _tdeIds,
        uint256 actualCycle,
        uint256 _tokenId
    ) external view returns (Claim[] memory);
}

// SPDX-License-Identifier: MIT
/**
 _____
/  __ \
| /  \/ ___  _ ____   _____ _ __ __ _  ___ _ __   ___ ___
| |    / _ \| '_ \ \ / / _ \ '__/ _` |/ _ \ '_ \ / __/ _ \
| \__/\ (_) | | | \ V /  __/ | | (_| |  __/ | | | (_|  __/
\____/\___/|_| |_|\_/ \___|_|  \__, |\___|_| |_|\___\___|
                                 __/ |
                                |___/
 */
pragma solidity ^0.8.0;

import "@openzeppelin/contracts-upgradeable/token/ERC721/extensions/ERC721EnumerableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";

/// @notice ERC721Enumerable implementing a timelock per token
///         This value is checked on several usecase in the protocol
///         Allows to protect a token buyer in order to dont be frontrun buy a malicious seller
abstract contract CvgERC721TimeLockingUpgradeable is ERC721EnumerableUpgradeable, Ownable2StepUpgradeable {
    /// @dev maximum time from actual timestamp of locking
    uint256 public maxLockingTime;

    /// @dev buffer for minimum time lock
    uint256 public constant BUFFER = 15 minutes;

    /// @dev timelockEnd per tokenId
    mapping(uint256 => uint256) public unlockingTimestampPerToken;

    uint256[49] private __gap;

    modifier onlyNftOwner(uint256 tokenId) {
        _isOwnerOf(msg.sender, tokenId);
        _;
    }

    function getTokenIdsForWallet(address _wallet) public view returns (uint256[] memory) {
        uint256 range = balanceOf(_wallet);
        uint256[] memory tokenIds = new uint256[](range);
        for (uint256 i; i < range; i++) {
            tokenIds[i] = tokenOfOwnerByIndex(_wallet, i);
        }
        return tokenIds;
    }

    function _isOwnerOf(address addr, uint256 _tokenId) internal view {
        require(addr == ownerOf(_tokenId), "TOKEN_NOT_OWNED");
    }

    /// @notice As the Contract Owner, change the maximum lock time
    /// @param newMaxLockingTime new maximum locking time, in seconds
    function setMaxLockingTime(uint256 newMaxLockingTime) external onlyOwner {
        maxLockingTime = newMaxLockingTime;
    }

    /// @notice As the Token Owner, set a timelock until a timestamp
    /// @param tokenId token to timelock
    /// @param timestamp timestamp where the timelock ends
    function setLock(uint256 tokenId, uint256 timestamp) external onlyNftOwner(tokenId) {
        require(timestamp >= block.timestamp + BUFFER, "TIME_BUFFER");
        require(timestamp - block.timestamp < maxLockingTime, "MAX_TIME_LOCK");
        require(timestamp > unlockingTimestampPerToken[tokenId], "ALREADY_LOCKED");

        unlockingTimestampPerToken[tokenId] = timestamp;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 250
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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