// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

//   $$\     $$\       $$\                 $$\                         $$\
//   $$ |    $$ |      \__|                $$ |                        $$ |
// $$$$$$\   $$$$$$$\  $$\  $$$$$$\   $$$$$$$ |$$\  $$\  $$\  $$$$$$\  $$$$$$$\
// \_$$  _|  $$  __$$\ $$ |$$  __$$\ $$  __$$ |$$ | $$ | $$ |$$  __$$\ $$  __$$\
//   $$ |    $$ |  $$ |$$ |$$ |  \__|$$ /  $$ |$$ | $$ | $$ |$$$$$$$$ |$$ |  $$ |
//   $$ |$$\ $$ |  $$ |$$ |$$ |      $$ |  $$ |$$ | $$ | $$ |$$   ____|$$ |  $$ |
//   \$$$$  |$$ |  $$ |$$ |$$ |      \$$$$$$$ |\$$$$$\$$$$  |\$$$$$$$\ $$$$$$$  |
//    \____/ \__|  \__|\__|\__|       \_______| \_____\____/  \_______|\_______/

import "lib/dynamic-contracts/src/presets/BaseRouter.sol";

import "../extension/Multicall.sol";

import "../dynamic-contracts/extension/Initializable.sol";
import "../dynamic-contracts/extension/Permissions.sol";
import "../dynamic-contracts/extension/ERC2771ContextUpgradeable.sol";

import "../dynamic-contracts/init/ContractMetadataInit.sol";
import "../dynamic-contracts/init/ERC721AInit.sol";
import "../dynamic-contracts/init/OwnableInit.sol";
import "../dynamic-contracts/init/PermissionsEnumerableInit.sol";
import "../dynamic-contracts/init/PrimarySaleInit.sol";
import "../dynamic-contracts/init/RoyaltyInit.sol";
import "../dynamic-contracts/init/SignatureActionInit.sol";
import "../dynamic-contracts/init/DefaultOperatorFiltererInit.sol";

/**
 *  Defualt extensions to add:
 *      - TieredDropLogic
 *      - PermissionsEnumerable
 */

contract TieredDrop is
    Initializable,
    Multicall,
    ERC2771ContextUpgradeable,
    BaseRouter,
    DefaultOperatorFiltererInit,
    PrimarySaleInit,
    ContractMetadataInit,
    ERC721AInit,
    OwnableInit,
    PermissionsEnumerableInit,
    RoyaltyInit,
    SignatureActionInit
{
    /*///////////////////////////////////////////////////////////////
                    Constructor and Initializer logic
    //////////////////////////////////////////////////////////////*/

    constructor(Extension[] memory _extensions) BaseRouter(_extensions) {}

    /// @dev Initiliazes the contract, like a constructor.
    function initialize(
        address _defaultAdmin,
        string memory _name,
        string memory _symbol,
        string memory _contractURI,
        address[] memory _trustedForwarders,
        address _saleRecipient,
        address _royaltyRecipient,
        uint16 _royaltyBps
    ) external initializer {
        // Initialize inherited contracts, most base-like -> most derived.
        __ERC2771Context_init(_trustedForwarders);
        __ERC721A_init(_name, _symbol);
        __SignatureAction_init();

        _setupContractURI(_contractURI);
        _setupOwner(_defaultAdmin);

        _setupRoles(_defaultAdmin);

        _setupDefaultRoyaltyInfo(_royaltyRecipient, _royaltyBps);
        _setupPrimarySaleRecipient(_saleRecipient);

        _setupOperatorFilterer();
    }

    function _setupRoles(address _defaultAdmin) internal onlyInitializing {
        bytes32 _operatorRole = keccak256("OPERATOR_ROLE");
        bytes32 _transferRole = keccak256("TRANSFER_ROLE");
        bytes32 _minterRole = keccak256("MINTER_ROLE");
        bytes32 _defaultAdminRole = 0x00;

        _setupRole(_defaultAdminRole, _defaultAdmin);
        _setupRole(_minterRole, _defaultAdmin);
        _setupRole(_transferRole, _defaultAdmin);
        _setupRole(_transferRole, address(0));
        _setupRole(_operatorRole, _defaultAdmin);
        _setupRole(_operatorRole, address(0));
    }

    /*///////////////////////////////////////////////////////////////
                        Internal functions
    //////////////////////////////////////////////////////////////*/

    /// @dev Returns whether a plugin can be set in the given execution context.
    function _canSetExtension() internal view virtual override returns (bool) {
        bytes32 defaultAdminRole = 0x00;
        return _hasRole(defaultAdminRole, _msgSender());
    }

    /// @dev Checks whether an account holds the given role.
    function _hasRole(bytes32 role, address addr) internal view returns (bool) {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        return data._hasRole[role][addr];
    }
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

////////// CHANGELOG: turn `approve` to virtual //////////

import "../../eip/interface/IERC721A.sol";
import "../../eip/interface/IERC721Receiver.sol";
import "../../lib/TWAddress.sol";
import "../../openzeppelin-presets/utils/Context.sol";
import "../../lib/TWStrings.sol";
import "../../eip/ERC165.sol";
import "../extension/Initializable.sol";

library ERC721AStorage {
    bytes32 public constant ERC721A_STORAGE_POSITION = keccak256("erc721.a.storage");

    struct Data {
        // The tokenId of the next token to be minted.
        uint256 _currentIndex;
        // The number of tokens burned.
        uint256 _burnCounter;
        // Token name
        string _name;
        // Token symbol
        string _symbol;
        // Mapping from token ID to ownership details
        // An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.
        mapping(uint256 => IERC721A.TokenOwnership) _ownerships;
        // Mapping owner address to address data
        mapping(address => IERC721A.AddressData) _addressData;
        // Mapping from token ID to approved address
        mapping(uint256 => address) _tokenApprovals;
        // Mapping from owner to operator approvals
        mapping(address => mapping(address => bool)) _operatorApprovals;
    }

    function erc721AStorage() internal pure returns (Data storage erc721AData) {
        bytes32 position = ERC721A_STORAGE_POSITION;
        assembly {
            erc721AData.slot := position
        }
    }
}

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension. Built to optimize for lower gas during batch mints.
 *
 * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
 *
 * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 *
 * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721AUpgradeable is Initializable, Context, ERC165, IERC721A {
    using TWAddress for address;
    using TWStrings for uint256;

    function __ERC721A_init(string memory name_, string memory symbol_) internal onlyInitializing {
        __ERC721A_init_unchained(name_, symbol_);
    }

    function __ERC721A_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();

        data._name = name_;
        data._symbol = symbol_;
        data._currentIndex = _startTokenId();
    }

    /**
     * To change the starting tokenId, please override this function.
     */
    function _startTokenId() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
     */
    function totalSupply() public view override returns (uint256) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();

        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than _currentIndex - _startTokenId() times
        unchecked {
            return data._currentIndex - data._burnCounter - _startTokenId();
        }
    }

    /**
     * Returns the total amount of tokens minted in the contract.
     */
    function _totalMinted() internal view returns (uint256) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        // Counter underflow is impossible as _currentIndex does not decrement,
        // and it is initialized to _startTokenId()
        unchecked {
            return data._currentIndex - _startTokenId();
        }
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view override returns (uint256) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return uint256(data._addressData[owner].balance);
    }

    /**
     * Returns the number of tokens minted by `owner`.
     */
    function _numberMinted(address owner) internal view returns (uint256) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        return uint256(data._addressData[owner].numberMinted);
    }

    /**
     * Returns the number of tokens burned by or on behalf of `owner`.
     */
    function _numberBurned(address owner) internal view returns (uint256) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        return uint256(data._addressData[owner].numberBurned);
    }

    /**
     * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     */
    function _getAux(address owner) internal view returns (uint64) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        return data._addressData[owner].aux;
    }

    /**
     * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     * If there are multiple variables, please pack them into a uint64.
     */
    function _setAux(address owner, uint64 aux) internal {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        data._addressData[owner].aux = aux;
    }

    /**
     * Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around in the collection over time.
     */
    function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();

        uint256 curr = tokenId;

        unchecked {
            if (_startTokenId() <= curr)
                if (curr < data._currentIndex) {
                    TokenOwnership memory ownership = data._ownerships[curr];
                    if (!ownership.burned) {
                        if (ownership.addr != address(0)) {
                            return ownership;
                        }
                        // Invariant:
                        // There will always be an ownership that has an address and is not burned
                        // before an ownership that does not have an address and is not burned.
                        // Hence, curr will not underflow.
                        while (true) {
                            curr--;
                            ownership = data._ownerships[curr];
                            if (ownership.addr != address(0)) {
                                return ownership;
                            }
                        }
                    }
                }
        }
        revert OwnerQueryForNonexistentToken();
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return _ownershipOf(tokenId).addr;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        return data._name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        return data._symbol;
    }

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

        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 overriden 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 = ERC721AUpgradeable.ownerOf(tokenId);
        if (to == owner) revert ApprovalToCurrentOwner();

        if (_msgSender() != owner)
            if (!isApprovedForAll(owner, _msgSender())) {
                revert ApprovalCallerNotOwnerNorApproved();
            }

        _approve(to, tokenId, owner);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();

        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return data._tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();

        if (operator == _msgSender()) revert ApproveToCaller();

        data._operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        return data._operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        _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 {
        _transfer(from, to, tokenId);
        if (to.isContract())
            if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {
                revert TransferToNonERC721ReceiverImplementer();
            }
    }

    /**
     * @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`),
     */
    function _exists(uint256 tokenId) internal view returns (bool) {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        return _startTokenId() <= tokenId && tokenId < data._currentIndex && !data._ownerships[tokenId].burned;
    }

    /**
     * @dev Equivalent to `_safeMint(to, quantity, '')`.
     */
    function _safeMint(address to, uint256 quantity) internal {
        _safeMint(to, quantity, "");
    }

    /**
     * @dev Safely mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement
     *   {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();

        uint256 startTokenId = data._currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
        unchecked {
            data._addressData[to].balance += uint64(quantity);
            data._addressData[to].numberMinted += uint64(quantity);

            data._ownerships[startTokenId].addr = to;
            data._ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

            uint256 updatedIndex = startTokenId;
            uint256 end = updatedIndex + quantity;

            if (to.isContract()) {
                do {
                    emit Transfer(address(0), to, updatedIndex);
                    if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
                        revert TransferToNonERC721ReceiverImplementer();
                    }
                } while (updatedIndex < end);
                // Reentrancy protection
                if (data._currentIndex != startTokenId) revert();
            } else {
                do {
                    emit Transfer(address(0), to, updatedIndex++);
                } while (updatedIndex < end);
            }
            data._currentIndex = updatedIndex;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 quantity) internal {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();

        uint256 startTokenId = data._currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
        unchecked {
            data._addressData[to].balance += uint64(quantity);
            data._addressData[to].numberMinted += uint64(quantity);

            data._ownerships[startTokenId].addr = to;
            data._ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

            uint256 updatedIndex = startTokenId;
            uint256 end = updatedIndex + quantity;

            do {
                emit Transfer(address(0), to, updatedIndex++);
            } while (updatedIndex < end);

            data._currentIndex = updatedIndex;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * 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
    ) private {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();

        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);

        if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();

        bool isApprovedOrOwner = (_msgSender() == from ||
            isApprovedForAll(from, _msgSender()) ||
            getApproved(tokenId) == _msgSender());

        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, from);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            data._addressData[from].balance -= 1;
            data._addressData[to].balance += 1;

            TokenOwnership storage currSlot = data._ownerships[tokenId];
            currSlot.addr = to;
            currSlot.startTimestamp = uint64(block.timestamp);

            // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            TokenOwnership storage nextSlot = data._ownerships[nextTokenId];
            if (nextSlot.addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId != data._currentIndex) {
                    nextSlot.addr = from;
                    nextSlot.startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }

    /**
     * @dev Equivalent to `_burn(tokenId, false)`.
     */
    function _burn(uint256 tokenId) internal virtual {
        _burn(tokenId, false);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();

        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);

        address from = prevOwnership.addr;

        if (approvalCheck) {
            bool isApprovedOrOwner = (_msgSender() == from ||
                isApprovedForAll(from, _msgSender()) ||
                getApproved(tokenId) == _msgSender());

            if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        }

        _beforeTokenTransfers(from, address(0), tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, from);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            AddressData storage addressData = data._addressData[from];
            addressData.balance -= 1;
            addressData.numberBurned += 1;

            // Keep track of who burned the token, and the timestamp of burning.
            TokenOwnership storage currSlot = data._ownerships[tokenId];
            currSlot.addr = from;
            currSlot.startTimestamp = uint64(block.timestamp);
            currSlot.burned = true;

            // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            TokenOwnership storage nextSlot = data._ownerships[nextTokenId];
            if (nextSlot.addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId != data._currentIndex) {
                    nextSlot.addr = from;
                    nextSlot.startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(from, address(0), tokenId);
        _afterTokenTransfers(from, address(0), tokenId, 1);

        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
        unchecked {
            data._burnCounter++;
        }
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(
        address to,
        uint256 tokenId,
        address owner
    ) private {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();
        data._tokenApprovals[tokenId] = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target 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 _checkContractOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
            return retval == IERC721Receiver(to).onERC721Received.selector;
        } catch (bytes memory reason) {
            if (reason.length == 0) {
                revert TransferToNonERC721ReceiverImplementer();
            } else {
                assembly {
                    revert(add(32, reason), mload(reason))
                }
            }
        }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
     * And also called before burning one token.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
     * minting.
     * And also called after one token has been burned.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
     * transferred to `to`.
     * - When `from` is zero, `tokenId` has been minted for `to`.
     * - When `to` is zero, `tokenId` has been burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../../extension/interface/IContractMetadata.sol";

/**
 *  @author  thirdweb.com
 *
 *  @title   Contract Metadata
 *  @notice  Thirdweb's `ContractMetadata` is a contract extension for any base contracts. It lets you set a metadata URI
 *           for you contract.
 *           Additionally, `ContractMetadata` is necessary for NFT contracts that want royalties to get distributed on OpenSea.
 */

library ContractMetadataStorage {
    bytes32 public constant CONTRACT_METADATA_STORAGE_POSITION = keccak256("contract.metadata.storage");

    struct Data {
        /// @notice Returns the contract metadata URI.
        string contractURI;
    }

    function contractMetadataStorage() internal pure returns (Data storage contractMetadataData) {
        bytes32 position = CONTRACT_METADATA_STORAGE_POSITION;
        assembly {
            contractMetadataData.slot := position
        }
    }
}

abstract contract ContractMetadata is IContractMetadata {
    /**
     *  @notice         Lets a contract admin set the URI for contract-level metadata.
     *  @dev            Caller should be authorized to setup contractURI, e.g. contract admin.
     *                  See {_canSetContractURI}.
     *                  Emits {ContractURIUpdated Event}.
     *
     *  @param _uri     keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")
     */
    function setContractURI(string memory _uri) external override {
        if (!_canSetContractURI()) {
            revert("Not authorized");
        }

        _setupContractURI(_uri);
    }

    /// @dev Lets a contract admin set the URI for contract-level metadata.
    function _setupContractURI(string memory _uri) internal {
        ContractMetadataStorage.Data storage data = ContractMetadataStorage.contractMetadataStorage();
        string memory prevURI = data.contractURI;
        data.contractURI = _uri;

        emit ContractURIUpdated(prevURI, _uri);
    }

    /// @notice Returns the contract metadata URI.
    function contractURI() public view virtual override returns (string memory) {
        ContractMetadataStorage.Data storage data = ContractMetadataStorage.contractMetadataStorage();
        return data.contractURI;
    }

    /// @dev Returns whether contract metadata can be set in the given execution context.
    function _canSetContractURI() internal view virtual returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol)

pragma solidity ^0.8.0;

import "../../openzeppelin-presets/utils/cryptography/ECDSA.sol";
import "./Initializable.sol";

library EIP712Storage {
    bytes32 public constant EIP712_STORAGE_POSITION = keccak256("eip712.storage");

    struct Data {
        /* solhint-disable var-name-mixedcase */
        bytes32 _HASHED_NAME;
        bytes32 _HASHED_VERSION;
        /* solhint-enable var-name-mixedcase */
    }

    function eip712Storage() internal pure returns (Data storage eip712Data) {
        bytes32 position = EIP712_STORAGE_POSITION;
        assembly {
            eip712Data.slot := position
        }
    }
}

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * _Available since v3.4._
 *
 * @custom:storage-size 52
 */
abstract contract EIP712Upgradeable is Initializable {
    /* solhint-disable var-name-mixedcase */
    bytes32 private constant _TYPE_HASH =
        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");

    /* solhint-enable var-name-mixedcase */

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    function __EIP712_init(string memory name, string memory version) internal onlyInitializing {
        __EIP712_init_unchained(name, version);
    }

    function __EIP712_init_unchained(string memory name, string memory version) internal onlyInitializing {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));

        EIP712Storage.Data storage data = EIP712Storage.eip712Storage();

        data._HASHED_NAME = hashedName;
        data._HASHED_VERSION = hashedVersion;
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        return _buildDomainSeparator(_TYPE_HASH, _EIP712NameHash(), _EIP712VersionHash());
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }

    /**
     * @dev The hash of the name parameter for the EIP712 domain.
     *
     * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
     * are a concern.
     */
    function _EIP712NameHash() internal view virtual returns (bytes32) {
        EIP712Storage.Data storage data = EIP712Storage.eip712Storage();
        return data._HASHED_NAME;
    }

    /**
     * @dev The hash of the version parameter for the EIP712 domain.
     *
     * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
     * are a concern.
     */
    function _EIP712VersionHash() internal view virtual returns (bytes32) {
        EIP712Storage.Data storage data = EIP712Storage.eip712Storage();
        return data._HASHED_VERSION;
    }
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

import "../../extension/interface/IERC2771Context.sol";
import "./Initializable.sol";

/**
 * @dev Context variant with ERC2771 support.
 */

library ERC2771ContextStorage {
    bytes32 public constant ERC2771_CONTEXT_STORAGE_POSITION = keccak256("erc2771.context.storage");

    struct Data {
        mapping(address => bool) trustedForwarder;
    }

    function erc2771ContextStorage() internal pure returns (Data storage erc2771ContextData) {
        bytes32 position = ERC2771_CONTEXT_STORAGE_POSITION;
        assembly {
            erc2771ContextData.slot := position
        }
    }
}

/**
 * @dev Context variant with ERC2771 support.
 */
abstract contract ERC2771ContextUpgradeable is Initializable {
    function __ERC2771Context_init(address[] memory trustedForwarder) internal onlyInitializing {
        __ERC2771Context_init_unchained(trustedForwarder);
    }

    function __ERC2771Context_init_unchained(address[] memory trustedForwarder) internal onlyInitializing {
        ERC2771ContextStorage.Data storage data = ERC2771ContextStorage.erc2771ContextStorage();

        for (uint256 i = 0; i < trustedForwarder.length; i++) {
            data.trustedForwarder[trustedForwarder[i]] = true;
        }
    }

    function isTrustedForwarder(address forwarder) public view virtual returns (bool) {
        ERC2771ContextStorage.Data storage data = ERC2771ContextStorage.erc2771ContextStorage();
        return data.trustedForwarder[forwarder];
    }

    function _msgSender() internal view virtual returns (address sender) {
        if (isTrustedForwarder(msg.sender)) {
            // The assembly code is more direct than the Solidity version using `abi.decode`.
            assembly {
                sender := shr(96, calldataload(sub(calldatasize(), 20)))
            }
        } else {
            return msg.sender;
        }
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        if (isTrustedForwarder(msg.sender)) {
            return msg.data[:msg.data.length - 20];
        } else {
            return msg.data;
        }
    }

    uint256[49] private __gap;
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

import "../../lib/TWAddress.sol";

library InitStorage {
    /// @dev The location of the storage of the entrypoint contract's data.
    bytes32 constant INIT_STORAGE_POSITION = keccak256("init.storage");

    /// @dev Layout of the entrypoint contract's storage.
    struct Data {
        uint8 initialized;
        bool initializing;
    }

    /// @dev Returns the entrypoint contract's data at the relevant storage location.
    function initStorage() internal pure returns (Data storage initData) {
        bytes32 position = INIT_STORAGE_POSITION;
        assembly {
            initData.slot := position
        }
    }
}

abstract contract Initializable {
    /**
     * @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. Equivalent to `reinitializer(1)`.
     */
    modifier initializer() {
        InitStorage.Data storage data = InitStorage.initStorage();
        uint8 _initialized = data.initialized;
        bool _initializing = data.initializing;

        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!TWAddress.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        data.initialized = 1;
        if (isTopLevelCall) {
            data.initializing = true;
        }
        _;
        if (isTopLevelCall) {
            data.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.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so 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.
     *
     * 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.
     */
    modifier reinitializer(uint8 version) {
        InitStorage.Data storage data = InitStorage.initStorage();
        uint8 _initialized = data.initialized;
        bool _initializing = data.initializing;

        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        data.initialized = version;
        data.initializing = true;
        _;
        data.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() {
        InitStorage.Data storage data = InitStorage.initStorage();
        require(data.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.
     */
    function _disableInitializers() internal virtual {
        InitStorage.Data storage data = InitStorage.initStorage();
        uint8 _initialized = data.initialized;
        bool _initializing = data.initializing;

        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            data.initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../../extension/interface/IOperatorFilterToggle.sol";

library OperatorFilterToggleStorage {
    bytes32 public constant OPERATOR_FILTER_TOGGLE_STORAGE_POSITION = keccak256("operator.filter.toggle.storage");

    struct Data {
        bool operatorRestriction;
    }

    function operatorFilterToggleStorage() internal pure returns (Data storage operatorFilterToggleData) {
        bytes32 position = OPERATOR_FILTER_TOGGLE_STORAGE_POSITION;
        assembly {
            operatorFilterToggleData.slot := position
        }
    }
}

abstract contract OperatorFilterToggle is IOperatorFilterToggle {
    function operatorRestriction() external view override returns (bool) {
        OperatorFilterToggleStorage.Data storage data = OperatorFilterToggleStorage.operatorFilterToggleStorage();
        return data.operatorRestriction;
    }

    function setOperatorRestriction(bool _restriction) external {
        require(_canSetOperatorRestriction(), "Not authorized to set operator restriction.");
        _setOperatorRestriction(_restriction);
    }

    function _setOperatorRestriction(bool _restriction) internal {
        OperatorFilterToggleStorage.Data storage data = OperatorFilterToggleStorage.operatorFilterToggleStorage();

        data.operatorRestriction = _restriction;
        emit OperatorRestriction(_restriction);
    }

    function _canSetOperatorRestriction() internal virtual returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../../extension/interface/IOwnable.sol";

/**
 *  @title   Ownable
 *  @notice  Thirdweb's `Ownable` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *           who the 'owner' of the inheriting smart contract is, and lets the inheriting contract perform conditional logic that uses
 *           information about who the contract's owner is.
 */

library OwnableStorage {
    bytes32 public constant OWNABLE_STORAGE_POSITION = keccak256("ownable.storage");

    struct Data {
        /// @dev Owner of the contract (purpose: OpenSea compatibility)
        address _owner;
    }

    function ownableStorage() internal pure returns (Data storage ownableData) {
        bytes32 position = OWNABLE_STORAGE_POSITION;
        assembly {
            ownableData.slot := position
        }
    }
}

abstract contract Ownable is IOwnable {
    /// @dev Reverts if caller is not the owner.
    modifier onlyOwner() {
        OwnableStorage.Data storage data = OwnableStorage.ownableStorage();
        if (msg.sender != data._owner) {
            revert("Not authorized");
        }
        _;
    }

    /**
     *  @notice Returns the owner of the contract.
     */
    function owner() public view override returns (address) {
        OwnableStorage.Data storage data = OwnableStorage.ownableStorage();
        return data._owner;
    }

    /**
     *  @notice Lets an authorized wallet set a new owner for the contract.
     *  @param _newOwner The address to set as the new owner of the contract.
     */
    function setOwner(address _newOwner) external override {
        if (!_canSetOwner()) {
            revert("Not authorized");
        }
        _setupOwner(_newOwner);
    }

    /// @dev Lets a contract admin set a new owner for the contract. The new owner must be a contract admin.
    function _setupOwner(address _newOwner) internal {
        OwnableStorage.Data storage data = OwnableStorage.ownableStorage();

        address _prevOwner = data._owner;
        data._owner = _newOwner;

        emit OwnerUpdated(_prevOwner, _newOwner);
    }

    /// @dev Returns whether owner can be set in the given execution context.
    function _canSetOwner() internal view virtual returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../../extension/interface/IPermissions.sol";
import "../../lib/TWStrings.sol";

/**
 *  @title   Permissions
 *  @dev     This contracts provides extending-contracts with role-based access control mechanisms
 */

library PermissionsStorage {
    bytes32 public constant PERMISSIONS_STORAGE_POSITION = keccak256("permissions.storage");

    struct Data {
        /// @dev Map from keccak256 hash of a role => a map from address => whether address has role.
        mapping(bytes32 => mapping(address => bool)) _hasRole;
        /// @dev Map from keccak256 hash of a role to role admin. See {getRoleAdmin}.
        mapping(bytes32 => bytes32) _getRoleAdmin;
    }

    function permissionsStorage() internal pure returns (Data storage permissionsData) {
        bytes32 position = PERMISSIONS_STORAGE_POSITION;
        assembly {
            permissionsData.slot := position
        }
    }
}

contract Permissions is IPermissions {
    /// @dev Default admin role for all roles. Only accounts with this role can grant/revoke other roles.
    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /// @dev Modifier that checks if an account has the specified role; reverts otherwise.
    modifier onlyRole(bytes32 role) {
        _checkRole(role, _msgSender());
        _;
    }

    /**
     *  @notice         Checks whether an account has a particular role.
     *  @dev            Returns `true` if `account` has been granted `role`.
     *
     *  @param role     keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")
     *  @param account  Address of the account for which the role is being checked.
     */
    function hasRole(bytes32 role, address account) public view override returns (bool) {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        return data._hasRole[role][account];
    }

    /**
     *  @notice         Checks whether an account has a particular role;
     *                  role restrictions can be swtiched on and off.
     *
     *  @dev            Returns `true` if `account` has been granted `role`.
     *                  Role restrictions can be swtiched on and off:
     *                      - If address(0) has ROLE, then the ROLE restrictions
     *                        don't apply.
     *                      - If address(0) does not have ROLE, then the ROLE
     *                        restrictions will apply.
     *
     *  @param role     keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")
     *  @param account  Address of the account for which the role is being checked.
     */
    function hasRoleWithSwitch(bytes32 role, address account) public view returns (bool) {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        if (!data._hasRole[role][address(0)]) {
            return data._hasRole[role][account];
        }

        return true;
    }

    /**
     *  @notice         Returns the admin role that controls the specified role.
     *  @dev            See {grantRole} and {revokeRole}.
     *                  To change a role's admin, use {_setRoleAdmin}.
     *
     *  @param role     keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")
     */
    function getRoleAdmin(bytes32 role) external view override returns (bytes32) {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        return data._getRoleAdmin[role];
    }

    /**
     *  @notice         Grants a role to an account, if not previously granted.
     *  @dev            Caller must have admin role for the `role`.
     *                  Emits {RoleGranted Event}.
     *
     *  @param role     keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")
     *  @param account  Address of the account to which the role is being granted.
     */
    function grantRole(bytes32 role, address account) public virtual override {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        _checkRole(data._getRoleAdmin[role], _msgSender());
        if (data._hasRole[role][account]) {
            revert("Can only grant to non holders");
        }
        _setupRole(role, account);
    }

    /**
     *  @notice         Revokes role from an account.
     *  @dev            Caller must have admin role for the `role`.
     *                  Emits {RoleRevoked Event}.
     *
     *  @param role     keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")
     *  @param account  Address of the account from which the role is being revoked.
     */
    function revokeRole(bytes32 role, address account) public virtual override {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        _checkRole(data._getRoleAdmin[role], _msgSender());
        _revokeRole(role, account);
    }

    /**
     *  @notice         Revokes role from the account.
     *  @dev            Caller must have the `role`, with caller being the same as `account`.
     *                  Emits {RoleRevoked Event}.
     *
     *  @param role     keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")
     *  @param account  Address of the account from which the role is being revoked.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        if (_msgSender() != account) {
            revert("Can only renounce for self");
        }
        _revokeRole(role, account);
    }

    /// @dev Sets `adminRole` as `role`'s admin role.
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        bytes32 previousAdminRole = data._getRoleAdmin[role];
        data._getRoleAdmin[role] = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /// @dev Sets up `role` for `account`
    function _setupRole(bytes32 role, address account) internal virtual {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        data._hasRole[role][account] = true;
        emit RoleGranted(role, account, _msgSender());
    }

    /// @dev Revokes `role` from `account`
    function _revokeRole(bytes32 role, address account) internal virtual {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        _checkRole(role, account);
        delete data._hasRole[role][account];
        emit RoleRevoked(role, account, _msgSender());
    }

    /// @dev Checks `role` for `account`. Reverts with a message including the required role.
    function _checkRole(bytes32 role, address account) internal view virtual {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        if (!data._hasRole[role][account]) {
            revert(
                string(
                    abi.encodePacked(
                        "Permissions: account ",
                        TWStrings.toHexString(uint160(account), 20),
                        " is missing role ",
                        TWStrings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /// @dev Checks `role` for `account`. Reverts with a message including the required role.
    function _checkRoleWithSwitch(bytes32 role, address account) internal view virtual {
        if (!hasRoleWithSwitch(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "Permissions: account ",
                        TWStrings.toHexString(uint160(account), 20),
                        " is missing role ",
                        TWStrings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    function _msgSender() internal view virtual returns (address sender) {
        return msg.sender;
    }

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

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../../extension/interface/IPermissionsEnumerable.sol";
import "./Permissions.sol";

/**
 *  @title   PermissionsEnumerable
 *  @dev     This contracts provides extending-contracts with role-based access control mechanisms.
 *           Also provides interfaces to view all members with a given role, and total count of members.
 */

library PermissionsEnumerableStorage {
    bytes32 public constant PERMISSIONS_ENUMERABLE_STORAGE_POSITION = keccak256("permissions.enumerable.storage");

    /**
     *  @notice A data structure to store data of members for a given role.
     *
     *  @param index    Current index in the list of accounts that have a role.
     *  @param members  map from index => address of account that has a role
     *  @param indexOf  map from address => index which the account has.
     */
    struct RoleMembers {
        uint256 index;
        mapping(uint256 => address) members;
        mapping(address => uint256) indexOf;
    }

    struct Data {
        /// @dev map from keccak256 hash of a role to its members' data. See {RoleMembers}.
        mapping(bytes32 => RoleMembers) roleMembers;
    }

    function permissionsEnumerableStorage() internal pure returns (Data storage permissionsEnumerableData) {
        bytes32 position = PERMISSIONS_ENUMERABLE_STORAGE_POSITION;
        assembly {
            permissionsEnumerableData.slot := position
        }
    }
}

contract PermissionsEnumerable is IPermissionsEnumerable, Permissions {
    /**
     *  @notice         Returns the role-member from a list of members for a role,
     *                  at a given index.
     *  @dev            Returns `member` who has `role`, at `index` of role-members list.
     *                  See struct {RoleMembers}, and mapping {roleMembers}
     *
     *  @param role     keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")
     *  @param index    Index in list of current members for the role.
     *
     *  @return member  Address of account that has `role`
     */
    function getRoleMember(bytes32 role, uint256 index) external view override returns (address member) {
        PermissionsEnumerableStorage.Data storage data = PermissionsEnumerableStorage.permissionsEnumerableStorage();
        uint256 currentIndex = data.roleMembers[role].index;
        uint256 check;

        for (uint256 i = 0; i < currentIndex; i += 1) {
            if (data.roleMembers[role].members[i] != address(0)) {
                if (check == index) {
                    member = data.roleMembers[role].members[i];
                    return member;
                }
                check += 1;
            } else if (hasRole(role, address(0)) && i == data.roleMembers[role].indexOf[address(0)]) {
                check += 1;
            }
        }
    }

    /**
     *  @notice         Returns total number of accounts that have a role.
     *  @dev            Returns `count` of accounts that have `role`.
     *                  See struct {RoleMembers}, and mapping {roleMembers}
     *
     *  @param role     keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")
     *
     *  @return count   Total number of accounts that have `role`
     */
    function getRoleMemberCount(bytes32 role) external view override returns (uint256 count) {
        PermissionsEnumerableStorage.Data storage data = PermissionsEnumerableStorage.permissionsEnumerableStorage();
        uint256 currentIndex = data.roleMembers[role].index;

        for (uint256 i = 0; i < currentIndex; i += 1) {
            if (data.roleMembers[role].members[i] != address(0)) {
                count += 1;
            }
        }
        if (hasRole(role, address(0))) {
            count += 1;
        }
    }

    /// @dev Revokes `role` from `account`, and removes `account` from {roleMembers}
    ///      See {_removeMember}
    function _revokeRole(bytes32 role, address account) internal override {
        super._revokeRole(role, account);
        _removeMember(role, account);
    }

    /// @dev Grants `role` to `account`, and adds `account` to {roleMembers}
    ///      See {_addMember}
    function _setupRole(bytes32 role, address account) internal override {
        super._setupRole(role, account);
        _addMember(role, account);
    }

    /// @dev adds `account` to {roleMembers}, for `role`
    function _addMember(bytes32 role, address account) internal {
        PermissionsEnumerableStorage.Data storage data = PermissionsEnumerableStorage.permissionsEnumerableStorage();
        uint256 idx = data.roleMembers[role].index;
        data.roleMembers[role].index += 1;

        data.roleMembers[role].members[idx] = account;
        data.roleMembers[role].indexOf[account] = idx;
    }

    /// @dev removes `account` from {roleMembers}, for `role`
    function _removeMember(bytes32 role, address account) internal {
        PermissionsEnumerableStorage.Data storage data = PermissionsEnumerableStorage.permissionsEnumerableStorage();
        uint256 idx = data.roleMembers[role].indexOf[account];

        delete data.roleMembers[role].members[idx];
        delete data.roleMembers[role].indexOf[account];
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../../extension/interface/IPrimarySale.sol";

library PrimarySaleStorage {
    bytes32 public constant PRIMARY_SALE_STORAGE_POSITION = keccak256("primary.sale.storage");

    struct Data {
        address recipient;
    }

    function primarySaleStorage() internal pure returns (Data storage primarySaleData) {
        bytes32 position = PRIMARY_SALE_STORAGE_POSITION;
        assembly {
            primarySaleData.slot := position
        }
    }
}

/**
 *  @title   Primary Sale
 *  @notice  Thirdweb's `PrimarySale` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *           the recipient of primary sales, and lets the inheriting contract perform conditional logic that uses information about
 *           primary sales, if desired.
 */

abstract contract PrimarySale is IPrimarySale {
    /// @dev Returns primary sale recipient address.
    function primarySaleRecipient() public view override returns (address) {
        PrimarySaleStorage.Data storage data = PrimarySaleStorage.primarySaleStorage();
        return data.recipient;
    }

    /**
     *  @notice         Updates primary sale recipient.
     *  @dev            Caller should be authorized to set primary sales info.
     *                  See {_canSetPrimarySaleRecipient}.
     *                  Emits {PrimarySaleRecipientUpdated Event}; See {_setupPrimarySaleRecipient}.
     *
     *  @param _saleRecipient   Address to be set as new recipient of primary sales.
     */
    function setPrimarySaleRecipient(address _saleRecipient) external override {
        if (!_canSetPrimarySaleRecipient()) {
            revert("Not authorized");
        }
        _setupPrimarySaleRecipient(_saleRecipient);
    }

    /// @dev Lets a contract admin set the recipient for all primary sales.
    function _setupPrimarySaleRecipient(address _saleRecipient) internal {
        PrimarySaleStorage.Data storage data = PrimarySaleStorage.primarySaleStorage();
        data.recipient = _saleRecipient;
        emit PrimarySaleRecipientUpdated(_saleRecipient);
    }

    /// @dev Returns whether primary sale recipient can be set in the given execution context.
    function _canSetPrimarySaleRecipient() internal view virtual returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../../extension/interface/IRoyalty.sol";

library RoyaltyStorage {
    bytes32 public constant ROYALTY_STORAGE_POSITION = keccak256("royalty.storage");

    struct Data {
        /// @dev The (default) address that receives all royalty value.
        address royaltyRecipient;
        /// @dev The (default) % of a sale to take as royalty (in basis points).
        uint16 royaltyBps;
        /// @dev Token ID => royalty recipient and bps for token
        mapping(uint256 => IRoyalty.RoyaltyInfo) royaltyInfoForToken;
    }

    function royaltyStorage() internal pure returns (Data storage royaltyData) {
        bytes32 position = ROYALTY_STORAGE_POSITION;
        assembly {
            royaltyData.slot := position
        }
    }
}

/**
 *  @title   Royalty
 *  @notice  Thirdweb's `Royalty` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *           the recipient of royalty fee and the royalty fee basis points, and lets the inheriting contract perform conditional logic
 *           that uses information about royalty fees, if desired.
 *
 *  @dev     The `Royalty` contract is ERC2981 compliant.
 */

abstract contract Royalty is IRoyalty {
    /**
     *  @notice   View royalty info for a given token and sale price.
     *  @dev      Returns royalty amount and recipient for `tokenId` and `salePrice`.
     *  @param tokenId          The tokenID of the NFT for which to query royalty info.
     *  @param salePrice        Sale price of the token.
     *
     *  @return receiver        Address of royalty recipient account.
     *  @return royaltyAmount   Royalty amount calculated at current royaltyBps value.
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        virtual
        override
        returns (address receiver, uint256 royaltyAmount)
    {
        (address recipient, uint256 bps) = getRoyaltyInfoForToken(tokenId);
        receiver = recipient;
        royaltyAmount = (salePrice * bps) / 10_000;
    }

    /**
     *  @notice          View royalty info for a given token.
     *  @dev             Returns royalty recipient and bps for `_tokenId`.
     *  @param _tokenId  The tokenID of the NFT for which to query royalty info.
     */
    function getRoyaltyInfoForToken(uint256 _tokenId) public view override returns (address, uint16) {
        RoyaltyStorage.Data storage data = RoyaltyStorage.royaltyStorage();

        RoyaltyInfo memory royaltyForToken = data.royaltyInfoForToken[_tokenId];

        return
            royaltyForToken.recipient == address(0)
                ? (data.royaltyRecipient, uint16(data.royaltyBps))
                : (royaltyForToken.recipient, uint16(royaltyForToken.bps));
    }

    /**
     *  @notice Returns the defualt royalty recipient and BPS for this contract's NFTs.
     */
    function getDefaultRoyaltyInfo() external view override returns (address, uint16) {
        RoyaltyStorage.Data storage data = RoyaltyStorage.royaltyStorage();
        return (data.royaltyRecipient, uint16(data.royaltyBps));
    }

    /**
     *  @notice         Updates default royalty recipient and bps.
     *  @dev            Caller should be authorized to set royalty info.
     *                  See {_canSetRoyaltyInfo}.
     *                  Emits {DefaultRoyalty Event}; See {_setupDefaultRoyaltyInfo}.
     *
     *  @param _royaltyRecipient   Address to be set as default royalty recipient.
     *  @param _royaltyBps         Updated royalty bps.
     */
    function setDefaultRoyaltyInfo(address _royaltyRecipient, uint256 _royaltyBps) external override {
        if (!_canSetRoyaltyInfo()) {
            revert("Not authorized");
        }

        _setupDefaultRoyaltyInfo(_royaltyRecipient, _royaltyBps);
    }

    /// @dev Lets a contract admin update the default royalty recipient and bps.
    function _setupDefaultRoyaltyInfo(address _royaltyRecipient, uint256 _royaltyBps) internal {
        if (_royaltyBps > 10_000) {
            revert("Exceeds max bps");
        }

        RoyaltyStorage.Data storage data = RoyaltyStorage.royaltyStorage();

        data.royaltyRecipient = _royaltyRecipient;
        data.royaltyBps = uint16(_royaltyBps);

        emit DefaultRoyalty(_royaltyRecipient, _royaltyBps);
    }

    /**
     *  @notice         Updates default royalty recipient and bps for a particular token.
     *  @dev            Sets royalty info for `_tokenId`. Caller should be authorized to set royalty info.
     *                  See {_canSetRoyaltyInfo}.
     *                  Emits {RoyaltyForToken Event}; See {_setupRoyaltyInfoForToken}.
     *
     *  @param _recipient   Address to be set as royalty recipient for given token Id.
     *  @param _bps         Updated royalty bps for the token Id.
     */
    function setRoyaltyInfoForToken(
        uint256 _tokenId,
        address _recipient,
        uint256 _bps
    ) external override {
        if (!_canSetRoyaltyInfo()) {
            revert("Not authorized");
        }

        _setupRoyaltyInfoForToken(_tokenId, _recipient, _bps);
    }

    /// @dev Lets a contract admin set the royalty recipient and bps for a particular token Id.
    function _setupRoyaltyInfoForToken(
        uint256 _tokenId,
        address _recipient,
        uint256 _bps
    ) internal {
        if (_bps > 10_000) {
            revert("Exceeds max bps");
        }

        RoyaltyStorage.Data storage data = RoyaltyStorage.royaltyStorage();

        data.royaltyInfoForToken[_tokenId] = RoyaltyInfo({ recipient: _recipient, bps: _bps });

        emit RoyaltyForToken(_tokenId, _recipient, _bps);
    }

    /// @dev Returns whether royalty info can be set in the given execution context.
    function _canSetRoyaltyInfo() internal view virtual returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../../extension/interface/ISignatureAction.sol";
import "./EIP712Upgradeable.sol";

library SignatureActionStorage {
    bytes32 public constant SIGNATURE_ACTION_STORAGE_POSITION = keccak256("signature.action.storage");

    struct Data {
        /// @dev Mapping from a signed request UID => whether the request is processed.
        mapping(bytes32 => bool) executed;
    }

    function signatureActionStorage() internal pure returns (Data storage signatureActionData) {
        bytes32 position = SIGNATURE_ACTION_STORAGE_POSITION;
        assembly {
            signatureActionData.slot := position
        }
    }
}

abstract contract SignatureActionUpgradeable is EIP712Upgradeable, ISignatureAction {
    using ECDSA for bytes32;

    bytes32 private constant TYPEHASH =
        keccak256("GenericRequest(uint128 validityStartTimestamp,uint128 validityEndTimestamp,bytes32 uid,bytes data)");

    function __SignatureAction_init() internal onlyInitializing {
        __EIP712_init("SignatureAction", "1");
    }

    function __SignatureAction_init_unchained() internal onlyInitializing {}

    /// @dev Verifies that a request is signed by an authorized account.
    function verify(GenericRequest calldata _req, bytes calldata _signature)
        public
        view
        override
        returns (bool success, address signer)
    {
        SignatureActionStorage.Data storage data = SignatureActionStorage.signatureActionStorage();

        signer = _recoverAddress(_req, _signature);
        success = !data.executed[_req.uid] && _isAuthorizedSigner(signer);
    }

    /// @dev Returns whether a given address is authorized to sign requests.
    function _isAuthorizedSigner(address _signer) internal view virtual returns (bool);

    /// @dev Verifies a request and marks the request as processed.
    function _processRequest(GenericRequest calldata _req, bytes calldata _signature)
        internal
        returns (address signer)
    {
        bool success;
        (success, signer) = verify(_req, _signature);

        if (!success) {
            revert("Invalid req");
        }

        if (_req.validityStartTimestamp > block.timestamp || block.timestamp > _req.validityEndTimestamp) {
            revert("Req expired");
        }

        SignatureActionStorage.Data storage data = SignatureActionStorage.signatureActionStorage();
        data.executed[_req.uid] = true;
    }

    /// @dev Returns the address of the signer of the request.
    function _recoverAddress(GenericRequest calldata _req, bytes calldata _signature) internal view returns (address) {
        return _hashTypedDataV4(keccak256(_encodeRequest(_req))).recover(_signature);
    }

    /// @dev Encodes a request for recovery of the signer in `recoverAddress`.
    function _encodeRequest(GenericRequest calldata _req) internal pure returns (bytes memory) {
        return
            abi.encode(
                TYPEHASH,
                _req.validityStartTimestamp,
                _req.validityEndTimestamp,
                _req.uid,
                keccak256(_req.data)
            );
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import { ContractMetadataStorage } from "../extension/ContractMetadata.sol";

contract ContractMetadataInit {
    event ContractURIUpdated(string prevURI, string newURI);

    /// @dev Lets a contract admin set the URI for contract-level metadata.
    function _setupContractURI(string memory _uri) internal {
        ContractMetadataStorage.Data storage data = ContractMetadataStorage.contractMetadataStorage();
        string memory prevURI = data.contractURI;
        data.contractURI = _uri;

        emit ContractURIUpdated(prevURI, _uri);
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import "../../extension/interface/IOperatorFilterRegistry.sol";
import { OperatorFilterToggleStorage } from "../extension/OperatorFilterToggle.sol";

contract DefaultOperatorFiltererInit {
    event OperatorRestriction(bool restriction);

    IOperatorFilterRegistry constant OPERATOR_FILTER_REGISTRY =
        IOperatorFilterRegistry(0x000000000000AAeB6D7670E522A718067333cd4E);

    address constant DEFAULT_SUBSCRIPTION = address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6);

    function _setupOperatorFilterer() internal {
        __DefaultOperatorFilterer_init();
    }

    function __DefaultOperatorFilterer_init() private {
        __OperatorFilterer_init(DEFAULT_SUBSCRIPTION, true);

        OperatorFilterToggleStorage.Data storage data = OperatorFilterToggleStorage.operatorFilterToggleStorage();
        data.operatorRestriction = true;

        emit OperatorRestriction(true);
    }

    function __OperatorFilterer_init(address subscriptionOrRegistrantToCopy, bool subscribe) private {
        // If an inheriting token contract is deployed to a network without the registry deployed, the modifier
        // will not revert, but the contract will need to be registered with the registry once it is deployed in
        // order for the modifier to filter addresses.
        if (address(OPERATOR_FILTER_REGISTRY).code.length > 0) {
            if (!OPERATOR_FILTER_REGISTRY.isRegistered(address(this))) {
                if (subscribe) {
                    OPERATOR_FILTER_REGISTRY.registerAndSubscribe(address(this), subscriptionOrRegistrantToCopy);
                } else {
                    if (subscriptionOrRegistrantToCopy != address(0)) {
                        OPERATOR_FILTER_REGISTRY.registerAndCopyEntries(address(this), subscriptionOrRegistrantToCopy);
                    } else {
                        OPERATOR_FILTER_REGISTRY.register(address(this));
                    }
                }
            }
        }
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import { ERC721AStorage } from "../eip/ERC721AUpgradeable.sol";
import "../extension/Initializable.sol";

contract ERC721AInit is Initializable {
    function __ERC721A_init(string memory name_, string memory symbol_) internal onlyInitializing {
        __ERC721A_init_unchained(name_, symbol_);
    }

    function __ERC721A_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
        ERC721AStorage.Data storage data = ERC721AStorage.erc721AStorage();

        data._name = name_;
        data._symbol = symbol_;
        data._currentIndex = _startTokenId();
    }

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

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import { OwnableStorage } from "../extension/Ownable.sol";

contract OwnableInit {
    event OwnerUpdated(address indexed prevOwner, address indexed newOwner);

    /// @dev Lets a contract admin set a new owner for the contract. The new owner must be a contract admin.
    function _setupOwner(address _newOwner) internal {
        OwnableStorage.Data storage data = OwnableStorage.ownableStorage();

        address _prevOwner = data._owner;
        data._owner = _newOwner;

        emit OwnerUpdated(_prevOwner, _newOwner);
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import { PermissionsEnumerableStorage } from "../extension/PermissionsEnumerable.sol";
import "./PermissionsInit.sol";

contract PermissionsEnumerableInit is PermissionsInit {
    /// @dev Sets up `role` for `account`
    function _setupRole(bytes32 role, address account) internal override {
        super._setupRole(role, account);
        _addMember(role, account);
    }

    /// @dev adds `account` to {roleMembers}, for `role`
    function _addMember(bytes32 role, address account) internal {
        PermissionsEnumerableStorage.Data storage data = PermissionsEnumerableStorage.permissionsEnumerableStorage();
        uint256 idx = data.roleMembers[role].index;
        data.roleMembers[role].index += 1;

        data.roleMembers[role].members[idx] = account;
        data.roleMembers[role].indexOf[account] = idx;
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import { PermissionsStorage } from "../extension/Permissions.sol";

contract PermissionsInit {
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /// @dev Sets up `role` for `account`
    function _setupRole(bytes32 role, address account) internal virtual {
        PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
        data._hasRole[role][account] = true;
        emit RoleGranted(role, account, msg.sender);
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import { PrimarySaleStorage } from "../extension/PrimarySale.sol";

contract PrimarySaleInit {
    /// @dev Emitted when a new sale recipient is set.
    event PrimarySaleRecipientUpdated(address indexed recipient);

    /// @dev Lets a contract admin set the recipient for all primary sales.
    function _setupPrimarySaleRecipient(address _saleRecipient) internal {
        PrimarySaleStorage.Data storage data = PrimarySaleStorage.primarySaleStorage();
        data.recipient = _saleRecipient;
        emit PrimarySaleRecipientUpdated(_saleRecipient);
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import { RoyaltyStorage, IRoyalty } from "../extension/Royalty.sol";

contract RoyaltyInit {
    event DefaultRoyalty(address indexed newRoyaltyRecipient, uint256 newRoyaltyBps);

    /// @dev Lets a contract admin update the default royalty recipient and bps.
    function _setupDefaultRoyaltyInfo(address _royaltyRecipient, uint256 _royaltyBps) internal {
        if (_royaltyBps > 10_000) {
            revert("Exceeds max bps");
        }

        RoyaltyStorage.Data storage data = RoyaltyStorage.royaltyStorage();

        data.royaltyRecipient = _royaltyRecipient;
        data.royaltyBps = uint16(_royaltyBps);

        emit DefaultRoyalty(_royaltyRecipient, _royaltyBps);
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import { SignatureActionStorage } from "../extension/SignatureActionUpgradeable.sol";
import { EIP712Storage } from "../extension/EIP712Upgradeable.sol";
import "../extension/Initializable.sol";

contract EIP712Init is Initializable {
    function __EIP712_init(string memory name, string memory version) internal onlyInitializing {
        __EIP712_init_unchained(name, version);
    }

    function __EIP712_init_unchained(string memory name, string memory version) internal onlyInitializing {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));

        EIP712Storage.Data storage data = EIP712Storage.eip712Storage();

        data._HASHED_NAME = hashedName;
        data._HASHED_VERSION = hashedVersion;
    }
}

contract SignatureActionInit is EIP712Init {
    function __SignatureAction_init() internal onlyInitializing {
        __EIP712_init("SignatureAction", "1");
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./interface/IERC165.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 ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// 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
 * [EIP](https://eips.ethereum.org/EIPS/eip-165).
 *
 * 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
     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
     * 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: Apache 2.0
pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Interface for the NFT Royalty Standard.
 *
 * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
 * support for royalty payments across all NFT marketplaces and ecosystem participants.
 *
 * _Available since v4.5._
 */
interface IERC2981 is IERC165 {
    /**
     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be payed in that same unit of exchange.
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 {
    /**
     * @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);

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

    /**
     * @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 be 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: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * 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 Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address);

    /**
     * @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 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);

    /**
     * @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;
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import "./IERC721.sol";
import "./IERC721Metadata.sol";

/**
 * @dev Interface of an ERC721A compliant contract.
 */
interface IERC721A is IERC721, IERC721Metadata {
    /**
     * The caller must own the token or be an approved operator.
     */
    error ApprovalCallerNotOwnerNorApproved();

    /**
     * The token does not exist.
     */
    error ApprovalQueryForNonexistentToken();

    /**
     * The caller cannot approve to their own address.
     */
    error ApproveToCaller();

    /**
     * The caller cannot approve to the current owner.
     */
    error ApprovalToCurrentOwner();

    /**
     * Cannot query the balance for the zero address.
     */
    error BalanceQueryForZeroAddress();

    /**
     * Cannot mint to the zero address.
     */
    error MintToZeroAddress();

    /**
     * The quantity of tokens minted must be more than zero.
     */
    error MintZeroQuantity();

    /**
     * The token does not exist.
     */
    error OwnerQueryForNonexistentToken();

    /**
     * The caller must own the token or be an approved operator.
     */
    error TransferCallerNotOwnerNorApproved();

    /**
     * The token must be owned by `from`.
     */
    error TransferFromIncorrectOwner();

    /**
     * Cannot safely transfer to a contract that does not implement the ERC721Receiver interface.
     */
    error TransferToNonERC721ReceiverImplementer();

    /**
     * Cannot transfer to the zero address.
     */
    error TransferToZeroAddress();

    /**
     * The token does not exist.
     */
    error URIQueryForNonexistentToken();

    // Compiler will pack this into a single 256bit word.
    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Keeps track of the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
    }

    // Compiler will pack this into a single 256bit word.
    struct AddressData {
        // Realistically, 2**64-1 is more than enough.
        uint64 balance;
        // Keeps track of mint count with minimal overhead for tokenomics.
        uint64 numberMinted;
        // Keeps track of burn count with minimal overhead for tokenomics.
        uint64 numberBurned;
        // For miscellaneous variable(s) pertaining to the address
        // (e.g. number of whitelist mint slots used).
        // If there are multiple variables, please pack them into a uint64.
        uint64 aux;
    }

    /**
     * @dev Returns the total amount of tokens stored by the contract.
     *
     * Burned tokens are calculated here, use `_totalMinted()` if you want to count just minted tokens.
     */
    function totalSupply() external view returns (uint256);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension
/// @dev See https://eips.ethereum.org/EIPS/eip-721
///  Note: the ERC-165 identifier for this interface is 0x5b5e139f.
/* is ERC721 */
interface IERC721Metadata {
    /// @notice A descriptive name for a collection of NFTs in this contract
    function name() external view returns (string memory);

    /// @notice An abbreviated name for NFTs in this contract
    function symbol() external view returns (string memory);

    /// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
    /// @dev Throws if `_tokenId` is not a valid NFT. URIs are defined in RFC
    ///  3986. The URI may point to a JSON file that conforms to the "ERC721
    ///  Metadata JSON Schema".
    function tokenURI(uint256 _tokenId) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 IERC721Receiver {
    /**
     * @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 `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../lib/TWAddress.sol";
import "./interface/IMulticall.sol";

/**
 * @dev Provides a function to batch together multiple calls in a single external call.
 *
 * _Available since v4.1._
 */
contract Multicall is IMulticall {
    /**
     *  @notice Receives and executes a batch of function calls on this contract.
     *  @dev Receives and executes a batch of function calls on this contract.
     *
     *  @param data The bytes data that makes up the batch of function calls to execute.
     *  @return results The bytes data that makes up the result of the batch of function calls executed.
     */
    function multicall(bytes[] calldata data) external virtual override returns (bytes[] memory results) {
        results = new bytes[](data.length);
        for (uint256 i = 0; i < data.length; i++) {
            results[i] = TWAddress.functionDelegateCall(address(this), data[i]);
        }
        return results;
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  Thirdweb's `ContractMetadata` is a contract extension for any base contracts. It lets you set a metadata URI
 *  for you contract.
 *
 *  Additionally, `ContractMetadata` is necessary for NFT contracts that want royalties to get distributed on OpenSea.
 */

interface IContractMetadata {
    /// @dev Returns the metadata URI of the contract.
    function contractURI() external view returns (string memory);

    /**
     *  @dev Sets contract URI for the storefront-level metadata of the contract.
     *       Only module admin can call this function.
     */
    function setContractURI(string calldata _uri) external;

    /// @dev Emitted when the contract URI is updated.
    event ContractURIUpdated(string prevURI, string newURI);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

interface IERC2771Context {
    function isTrustedForwarder(address forwarder) external view returns (bool);
}

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

/// @author thirdweb

/**
 * @dev Provides a function to batch together multiple calls in a single external call.
 *
 * _Available since v4.1._
 */
interface IMulticall {
    /**
     * @dev Receives and executes a batch of function calls on this contract.
     */
    function multicall(bytes[] calldata data) external returns (bytes[] memory results);
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

/// @author thirdweb

interface IOperatorFilterRegistry {
    function isOperatorAllowed(address registrant, address operator) external view returns (bool);

    function register(address registrant) external;

    function registerAndSubscribe(address registrant, address subscription) external;

    function registerAndCopyEntries(address registrant, address registrantToCopy) external;

    function unregister(address addr) external;

    function updateOperator(
        address registrant,
        address operator,
        bool filtered
    ) external;

    function updateOperators(
        address registrant,
        address[] calldata operators,
        bool filtered
    ) external;

    function updateCodeHash(
        address registrant,
        bytes32 codehash,
        bool filtered
    ) external;

    function updateCodeHashes(
        address registrant,
        bytes32[] calldata codeHashes,
        bool filtered
    ) external;

    function subscribe(address registrant, address registrantToSubscribe) external;

    function unsubscribe(address registrant, bool copyExistingEntries) external;

    function subscriptionOf(address addr) external returns (address registrant);

    function subscribers(address registrant) external returns (address[] memory);

    function subscriberAt(address registrant, uint256 index) external returns (address);

    function copyEntriesOf(address registrant, address registrantToCopy) external;

    function isOperatorFiltered(address registrant, address operator) external returns (bool);

    function isCodeHashOfFiltered(address registrant, address operatorWithCode) external returns (bool);

    function isCodeHashFiltered(address registrant, bytes32 codeHash) external returns (bool);

    function filteredOperators(address addr) external returns (address[] memory);

    function filteredCodeHashes(address addr) external returns (bytes32[] memory);

    function filteredOperatorAt(address registrant, uint256 index) external returns (address);

    function filteredCodeHashAt(address registrant, uint256 index) external returns (bytes32);

    function isRegistered(address addr) external returns (bool);

    function codeHashOf(address addr) external returns (bytes32);
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

/// @author thirdweb

interface IOperatorFilterToggle {
    event OperatorRestriction(bool restriction);

    function operatorRestriction() external view returns (bool);

    function setOperatorRestriction(bool restriction) external;
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  Thirdweb's `Ownable` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *  who the 'owner' of the inheriting smart contract is, and lets the inheriting contract perform conditional logic that uses
 *  information about who the contract's owner is.
 */

interface IOwnable {
    /// @dev Returns the owner of the contract.
    function owner() external view returns (address);

    /// @dev Lets a module admin set a new owner for the contract. The new owner must be a module admin.
    function setOwner(address _newOwner) external;

    /// @dev Emitted when a new Owner is set.
    event OwnerUpdated(address indexed prevOwner, address indexed newOwner);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "./IPermissions.sol";

/**
 * @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
 */
interface IPermissionsEnumerable is IPermissions {
    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * [forum post](https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296)
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) external view returns (address);

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) external view returns (uint256);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  Thirdweb's `Primary` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *  the recipient of primary sales, and lets the inheriting contract perform conditional logic that uses information about
 *  primary sales, if desired.
 */

interface IPrimarySale {
    /// @dev The adress that receives all primary sales value.
    function primarySaleRecipient() external view returns (address);

    /// @dev Lets a module admin set the default recipient of all primary sales.
    function setPrimarySaleRecipient(address _saleRecipient) external;

    /// @dev Emitted when a new sale recipient is set.
    event PrimarySaleRecipientUpdated(address indexed recipient);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../../eip/interface/IERC2981.sol";

/**
 *  Thirdweb's `Royalty` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *  the recipient of royalty fee and the royalty fee basis points, and lets the inheriting contract perform conditional logic
 *  that uses information about royalty fees, if desired.
 *
 *  The `Royalty` contract is ERC2981 compliant.
 */

interface IRoyalty is IERC2981 {
    struct RoyaltyInfo {
        address recipient;
        uint256 bps;
    }

    /// @dev Returns the royalty recipient and fee bps.
    function getDefaultRoyaltyInfo() external view returns (address, uint16);

    /// @dev Lets a module admin update the royalty bps and recipient.
    function setDefaultRoyaltyInfo(address _royaltyRecipient, uint256 _royaltyBps) external;

    /// @dev Lets a module admin set the royalty recipient for a particular token Id.
    function setRoyaltyInfoForToken(
        uint256 tokenId,
        address recipient,
        uint256 bps
    ) external;

    /// @dev Returns the royalty recipient for a particular token Id.
    function getRoyaltyInfoForToken(uint256 tokenId) external view returns (address, uint16);

    /// @dev Emitted when royalty info is updated.
    event DefaultRoyalty(address indexed newRoyaltyRecipient, uint256 newRoyaltyBps);

    /// @dev Emitted when royalty recipient for tokenId is set
    event RoyaltyForToken(uint256 indexed tokenId, address indexed royaltyRecipient, uint256 royaltyBps);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  thirdweb's `SignatureAction` extension smart contract can be used with any base smart contract. It provides a generic
 *  payload struct that can be signed by an authorized wallet and verified by the contract. The bytes `data` field provided
 *  in the payload can be abi encoded <-> decoded to use `SignatureContract` for any authorized signature action.
 */

interface ISignatureAction {
    /**
     *  @notice The payload that must be signed by an authorized wallet.
     *
     *  @param validityStartTimestamp The UNIX timestamp at and after which a signature is valid.
     *  @param validityEndTimestamp The UNIX timestamp at and after which a signature is invalid/expired.
     *  @param uid A unique non-repeatable ID for the payload.
     *  @param data Arbitrary bytes data to be used at the discretion of the contract.
     */
    struct GenericRequest {
        uint128 validityStartTimestamp;
        uint128 validityEndTimestamp;
        bytes32 uid;
        bytes data;
    }

    /// @notice Emitted when a payload is verified and executed.
    event RequestExecuted(address indexed user, address indexed signer, GenericRequest _req);

    /**
     *  @notice Verfies that a payload is signed by an authorized wallet.
     *
     *  @param req The payload signed by the authorized wallet.
     *  @param signature The signature produced by the authorized wallet signing the given payload.
     *
     *  @return success Whether the payload is signed by the authorized wallet.
     *  @return signer The address of the signer.
     */
    function verify(GenericRequest calldata req, bytes calldata signature)
        external
        view
        returns (bool success, address signer);
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 * @dev Collection of functions related to the address type
 */
library TWAddress {
    /**
     * @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
     * ====
     *
     * [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.
     *
     * [EIP1884](https://eips.ethereum.org/EIPS/eip-1884) 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://diligence.consensys.net/posts/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/v0.5.11/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 functionCall(target, data, "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");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 * @dev String operations.
 */
library TWStrings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @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] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../../../lib/TWStrings.sol";

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

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

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

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

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

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

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

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

        return (signer, RecoverError.NoError);
    }

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

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

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

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT
// @author: thirdweb (https://github.com/thirdweb-dev/dynamic-contracts)

pragma solidity ^0.8.0;

import "../interface/IRouter.sol";

abstract contract Router is IRouter {

    fallback() external payable virtual {
    /// @dev delegate calls the appropriate implementation smart contract for a given function.
        address implementation = getImplementationForFunction(msg.sig);
        _delegate(implementation);
    }

    receive() external payable virtual {}

    /// @dev delegateCalls an `implementation` smart contract.
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /// @dev Unimplemented. Returns the implementation contract address for a given function signature.
    function getImplementationForFunction(bytes4 _functionSelector) public view virtual returns (address);
}

// SPDX-License-Identifier: MIT
// @author: thirdweb (https://github.com/thirdweb-dev/dynamic-contracts)

pragma solidity ^0.8.0;

import "./IDefaultExtensionSet.sol";

interface IBaseRouter is IDefaultExtensionSet {
    /*///////////////////////////////////////////////////////////////
                        External functions
    //////////////////////////////////////////////////////////////*/

    /// @dev Adds a new extension to the router.
    function addExtension(Extension memory extension) external;

    /// @dev Updates an existing extension in the router, or overrides a default extension.
    function updateExtension(Extension memory extension) external;

    /// @dev Removes an existing extension from the router.
    function removeExtension(string memory extensionName) external;
}

// SPDX-License-Identifier: MIT
// @author: thirdweb (https://github.com/thirdweb-dev/dynamic-contracts)

pragma solidity ^0.8.0;

import "./IExtension.sol";

interface IDefaultExtensionSet is IExtension {
    /*///////////////////////////////////////////////////////////////
                            View functions
    //////////////////////////////////////////////////////////////*/

    /// @dev Returns all extensions stored.
    function getAllExtensions() external view returns (Extension[] memory);

    /// @dev Returns all functions that belong to the given extension contract.
    function getAllFunctionsOfExtension(string memory extensionName) external view returns (ExtensionFunction[] memory);

    /// @dev Returns the extension metadata for a given function.
    function getExtensionForFunction(bytes4 functionSelector) external view returns (ExtensionMetadata memory);

    /// @dev Returns the extension's implementation smart contract address.
    function getExtensionImplementation(string memory extensionName) external view returns (address);

    /// @dev Returns the extension metadata and functions for a given extension.
    function getExtension(string memory extensionName) external view returns (Extension memory);
}

// SPDX-License-Identifier: MIT
// @author: thirdweb (https://github.com/thirdweb-dev/dynamic-contracts)

pragma solidity ^0.8.0;

interface IExtension {
    /*///////////////////////////////////////////////////////////////
                                Structs
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice A extension's metadata.
     *
     *  @param name             The unique name of the extension.
     *  @param metadataURI      The URI where the metadata for the extension lives.
     *  @param implementation   The implementation smart contract address of the extension.
     */
    struct ExtensionMetadata {
        string name;
        string metadataURI;
        address implementation;
    }

    /**
     *  @notice An interface to describe a extension's function.
     *
     *  @param functionSelector    The 4 byte selector of the function.
     *  @param functionSignature   Function signature as a string. E.g. "transfer(address,address,uint256)"
     */
    struct ExtensionFunction {
        bytes4 functionSelector;
        string functionSignature;
    }

    /**
     *  @notice An interface to describe an extension.
     *
     *  @param metadata     The extension's metadata; it's name, metadata URI and implementation contract address.
     *  @param functions    The functions that belong to the extension.
     */
    struct Extension {
        ExtensionMetadata metadata;
        ExtensionFunction[] functions;
    }

    /*///////////////////////////////////////////////////////////////
                                Events
    //////////////////////////////////////////////////////////////*/

    /// @dev Emitted when a extension is added; emitted for each function of the extension.
    event ExtensionAdded(address indexed extensionAddress, bytes4 indexed functionSelector, string functionSignature);

    /// @dev Emitted when extension is updated; emitted for each function of the extension.
    event ExtensionUpdated(
        address indexed oldExtensionAddress,
        address indexed newExtensionAddress,
        bytes4 indexed functionSelector,
        string functionSignature
    );

    /// @dev Emitted when a extension is removed; emitted for each function of the extension.
    event ExtensionRemoved(address indexed extensionAddress, bytes4 indexed functionSelector, string functionSignature);
}

// SPDX-License-Identifier: MIT
// @author: thirdweb (https://github.com/thirdweb-dev/dynamic-contracts)

pragma solidity ^0.8.0;

interface IRouter {
    fallback() external payable;
    receive() external payable;

    function getImplementationForFunction(bytes4 _functionSelector) external view returns (address);
}

// SPDX-License-Identifier: MIT
// @author: thirdweb (https://github.com/thirdweb-dev/dynamic-contracts)

pragma solidity ^0.8.0;

// Interface
import "../interface/IBaseRouter.sol";

// Core
import "../core/Router.sol";

// Utils
import "./utils/StringSet.sol";
import "./utils/DefaultExtensionSet.sol";
import "./utils/ExtensionState.sol";

abstract contract BaseRouter is IBaseRouter, Router, ExtensionState {
    using StringSet for StringSet.Set;

    /*///////////////////////////////////////////////////////////////
                            State variables
    //////////////////////////////////////////////////////////////*/

    /// @notice The DefaultExtensionSet that stores default extensions of the router.
    address public immutable defaultExtensionSet;

    /*///////////////////////////////////////////////////////////////
                                Constructor
    //////////////////////////////////////////////////////////////*/

    constructor(Extension[] memory _extensions) {

        DefaultExtensionSet map = new DefaultExtensionSet();
        defaultExtensionSet = address(map);

        uint256 len = _extensions.length;

        for (uint256 i = 0; i < len; i += 1) {
            map.setExtension(_extensions[i]);
        }
    }

    /*///////////////////////////////////////////////////////////////
                        External functions
    //////////////////////////////////////////////////////////////*/

    /// @dev Adds a new extension to the router.
    function addExtension(Extension memory _extension) external {
        require(_canSetExtension(), "BaseRouter: caller not authorized.");

        _addExtension(_extension);
    }

    /// @dev Updates an existing extension in the router, or overrides a default extension.
    function updateExtension(Extension memory _extension) external {
        require(_canSetExtension(), "BaseRouter: caller not authorized.");

        _updateExtension(_extension);
    }

    /// @dev Removes an existing extension from the router.
    function removeExtension(string memory _extensionName) external {
        require(_canSetExtension(), "BaseRouter: caller not authorized.");

        _removeExtension(_extensionName);
    }

    /*///////////////////////////////////////////////////////////////
                            View functions
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice Returns all extensions stored. Override default lugins stored in router are
     *          given precedence over default extensions in DefaultExtensionSet.
     */
    function getAllExtensions() external view returns (Extension[] memory allExtensions) {
        Extension[] memory defaultExtensions = IDefaultExtensionSet(defaultExtensionSet).getAllExtensions();
        uint256 defaultExtensionsLen = defaultExtensions.length;

        ExtensionStateStorage.Data storage data = ExtensionStateStorage.extensionStateStorage();
        string[] memory names = data.extensionNames.values();
        uint256 namesLen = names.length;

        uint256 overrides = 0;
        for (uint256 i = 0; i < defaultExtensionsLen; i += 1) {
            if (data.extensionNames.contains(defaultExtensions[i].metadata.name)) {
                overrides += 1;
            }
        }

        uint256 total = (namesLen + defaultExtensionsLen) - overrides;

        allExtensions = new Extension[](total);
        uint256 idx = 0;

        for (uint256 i = 0; i < defaultExtensionsLen; i += 1) {
            string memory name = defaultExtensions[i].metadata.name;
            if (!data.extensionNames.contains(name)) {
                allExtensions[idx] = defaultExtensions[i];
                idx += 1;
            }
        }

        for (uint256 i = 0; i < namesLen; i += 1) {
            allExtensions[idx] = data.extensions[names[i]];
            idx += 1;
        }
    }

    /// @dev Returns the extension metadata and functions for a given extension.
    function getExtension(string memory _extensionName) public view returns (Extension memory) {
        ExtensionStateStorage.Data storage data = ExtensionStateStorage.extensionStateStorage();
        bool isLocalExtension = data.extensionNames.contains(_extensionName);

        return isLocalExtension ? data.extensions[_extensionName] : IDefaultExtensionSet(defaultExtensionSet).getExtension(_extensionName);
    }

    /// @dev Returns the extension's implementation smart contract address.
    function getExtensionImplementation(string memory _extensionName) external view returns (address) {
        return getExtension(_extensionName).metadata.implementation;
    }

    /// @dev Returns all functions that belong to the given extension contract.
    function getAllFunctionsOfExtension(string memory _extensionName) external view returns (ExtensionFunction[] memory) {
        return getExtension(_extensionName).functions;
    }

    /// @dev Returns the extension metadata for a given function.
    function getExtensionForFunction(bytes4 _functionSelector) public view returns (ExtensionMetadata memory) {
        ExtensionStateStorage.Data storage data = ExtensionStateStorage.extensionStateStorage();
        ExtensionMetadata memory metadata = data.extensionMetadata[_functionSelector];

        bool isLocalExtension = metadata.implementation != address(0);

        return isLocalExtension ? metadata : IDefaultExtensionSet(defaultExtensionSet).getExtensionForFunction(_functionSelector);
    }

    /// @dev Returns the extension implementation address stored in router, for the given function.
    function getImplementationForFunction(bytes4 _functionSelector)
        public
        view
        override
        returns (address extensionAddress)
    {
        return getExtensionForFunction(_functionSelector).implementation;
    }

    /*///////////////////////////////////////////////////////////////
                        Internal functions
    //////////////////////////////////////////////////////////////*/

    /// @dev Returns whether a extension can be set in the given execution context.
    function _canSetExtension() internal view virtual returns (bool);
}

// SPDX-License-Identifier: MIT
// @author: thirdweb (https://github.com/thirdweb-dev/dynamic-contracts)

pragma solidity ^0.8.0;

// Interface
import "../../interface/IDefaultExtensionSet.sol";

// Extensions
import "./ExtensionState.sol";

contract DefaultExtensionSet is IDefaultExtensionSet, ExtensionState {
    using StringSet for StringSet.Set;

    /*///////////////////////////////////////////////////////////////
                            State variables
    //////////////////////////////////////////////////////////////*/

    /// @notice The deployer of DefaultExtensionSet.
    address private deployer;

    /*///////////////////////////////////////////////////////////////
                            Constructor
    //////////////////////////////////////////////////////////////*/

    constructor() {
        deployer = msg.sender;
    }

    /*///////////////////////////////////////////////////////////////
                            External functions
    //////////////////////////////////////////////////////////////*/

    /// @notice Stores a extension in the DefaultExtensionSet.
    function setExtension(Extension memory _extension) external {
        require(msg.sender == deployer, "DefaultExtensionSet: unauthorized caller.");
        _addExtension(_extension);
    }

    /*///////////////////////////////////////////////////////////////
                            View functions
    //////////////////////////////////////////////////////////////*/

    /// @notice Returns all extensions stored.
    function getAllExtensions() external view returns (Extension[] memory allExtensions) {
        ExtensionStateStorage.Data storage data = ExtensionStateStorage.extensionStateStorage();

        string[] memory names = data.extensionNames.values();
        uint256 len = names.length;

        allExtensions = new Extension[](len);

        for (uint256 i = 0; i < len; i += 1) {
            allExtensions[i] = data.extensions[names[i]];
        }
    }

    /// @notice Returns the extension metadata and functions for a given extension.
    function getExtension(string memory _extensionName) public view returns (Extension memory) {
        ExtensionStateStorage.Data storage data = ExtensionStateStorage.extensionStateStorage();
        require(data.extensionNames.contains(_extensionName), "DefaultExtensionSet: extension does not exist.");
        return data.extensions[_extensionName];
    }

    /// @notice Returns the extension's implementation smart contract address.
    function getExtensionImplementation(string memory _extensionName) external view returns (address) {
        return getExtension(_extensionName).metadata.implementation;
    }

    /// @notice Returns all functions that belong to the given extension contract.
    function getAllFunctionsOfExtension(string memory _extensionName) external view returns (ExtensionFunction[] memory) {
        return getExtension(_extensionName).functions;
    }

    /// @notice Returns the extension metadata for a given function.
    function getExtensionForFunction(bytes4 _functionSelector) external view returns (ExtensionMetadata memory) {
        ExtensionStateStorage.Data storage data = ExtensionStateStorage.extensionStateStorage();
        ExtensionMetadata memory metadata = data.extensionMetadata[_functionSelector];
        require(metadata.implementation != address(0), "DefaultExtensionSet: no extension for function.");
        return metadata;
    }
}

// SPDX-License-Identifier: MIT
// @author: thirdweb (https://github.com/thirdweb-dev/dynamic-contracts)

pragma solidity ^0.8.0;

// Interface
import "../../interface/IExtension.sol";

// Extensions
import "./StringSet.sol";

library ExtensionStateStorage {
    bytes32 public constant EXTENSION_STATE_STORAGE_POSITION = keccak256("extension.state.storage");

    struct Data {
        /// @dev Set of names of all extensions stored.
        StringSet.Set extensionNames;
        /// @dev Mapping from extension name => `Extension` i.e. extension metadata and functions.
        mapping(string => IExtension.Extension) extensions;
        /// @dev Mapping from function selector => extension metadata of the extension the function belongs to.
        mapping(bytes4 => IExtension.ExtensionMetadata) extensionMetadata;
    }

    function extensionStateStorage() internal pure returns (Data storage extensionStateData) {
        bytes32 position = EXTENSION_STATE_STORAGE_POSITION;
        assembly {
            extensionStateData.slot := position
        }
    }
}

contract ExtensionState is IExtension {
    using StringSet for StringSet.Set;

    /*///////////////////////////////////////////////////////////////
                        Internal functions
    //////////////////////////////////////////////////////////////*/

    /// @dev Stores a new extension in the contract.
    function _addExtension(Extension memory _extension) internal {
        ExtensionStateStorage.Data storage data = ExtensionStateStorage.extensionStateStorage();

        string memory name = _extension.metadata.name;

        require(data.extensionNames.add(name), "ExtensionState: extension already exists.");
        data.extensions[name].metadata = _extension.metadata;

        require(_extension.metadata.implementation != address(0), "ExtensionState: adding extension without implementation.");

        uint256 len = _extension.functions.length;
        for (uint256 i = 0; i < len; i += 1) {
            require(
                _extension.functions[i].functionSelector ==
                    bytes4(keccak256(abi.encodePacked(_extension.functions[i].functionSignature))),
                "ExtensionState: fn selector and signature mismatch."
            );
            require(
                data.extensionMetadata[_extension.functions[i].functionSelector].implementation == address(0),
                "ExtensionState: extension already exists for function."
            );

            data.extensionMetadata[_extension.functions[i].functionSelector] = _extension.metadata;
            data.extensions[name].functions.push(_extension.functions[i]);

            emit ExtensionAdded(
                _extension.metadata.implementation,
                _extension.functions[i].functionSelector,
                _extension.functions[i].functionSignature
            );
        }
    }

    /// @dev Updates / overrides an existing extension in the contract.
    function _updateExtension(Extension memory _extension) internal {
        ExtensionStateStorage.Data storage data = ExtensionStateStorage.extensionStateStorage();

        string memory name = _extension.metadata.name;
        require(data.extensionNames.contains(name), "ExtensionState: extension does not exist.");

        address oldImplementation = data.extensions[name].metadata.implementation;
        require(_extension.metadata.implementation != oldImplementation, "ExtensionState: re-adding same extension.");

        data.extensions[name].metadata = _extension.metadata;

        ExtensionFunction[] memory oldFunctions = data.extensions[name].functions;
        uint256 oldFunctionsLen = oldFunctions.length;

        delete data.extensions[name].functions;

        for (uint256 i = 0; i < oldFunctionsLen; i += 1) {
            delete data.extensionMetadata[oldFunctions[i].functionSelector];
        }

        uint256 len = _extension.functions.length;
        for (uint256 i = 0; i < len; i += 1) {
            require(
                _extension.functions[i].functionSelector ==
                    bytes4(keccak256(abi.encodePacked(_extension.functions[i].functionSignature))),
                "ExtensionState: fn selector and signature mismatch."
            );

            data.extensionMetadata[_extension.functions[i].functionSelector] = _extension.metadata;
            data.extensions[name].functions.push(_extension.functions[i]);

            emit ExtensionUpdated(
                oldImplementation,
                _extension.metadata.implementation,
                _extension.functions[i].functionSelector,
                _extension.functions[i].functionSignature
            );
        }
    }

    /// @dev Removes an existing extension from the contract.
    function _removeExtension(string memory _extensionName) internal {
        ExtensionStateStorage.Data storage data = ExtensionStateStorage.extensionStateStorage();

        require(data.extensionNames.remove(_extensionName), "ExtensionState: extension does not exist.");

        address implementation = data.extensions[_extensionName].metadata.implementation;
        ExtensionFunction[] memory extensionFunctions = data.extensions[_extensionName].functions;
        delete data.extensions[_extensionName];

        uint256 len = extensionFunctions.length;
        for (uint256 i = 0; i < len; i += 1) {
            emit ExtensionRemoved(
                implementation,
                extensionFunctions[i].functionSelector,
                extensionFunctions[i].functionSignature
            );
            delete data.extensionMetadata[extensionFunctions[i].functionSelector];
        }
    }
}

// SPDX-License-Identifier: Apache 2.0
// @author: thirdweb (https://github.com/thirdweb-dev/dynamic-contracts)

pragma solidity ^0.8.0;

library StringSet {
    struct Set {
        // Storage of set values
        string[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(string => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, string memory value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, string memory value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                string memory lastValue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, string memory value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (string memory) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (string[] memory) {
        return set._values;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Set storage set, string memory value) internal returns (bool) {
        return _add(set, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Set storage set, string memory value) internal returns (bool) {
        return _remove(set, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Set storage set, string memory value) internal view returns (bool) {
        return _contains(set, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Set storage set) internal view returns (uint256) {
        return _length(set);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Set storage set, uint256 index) internal view returns (string memory) {
        return _at(set, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Set storage set) internal view returns (string[] memory) {
        return _values(set);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "evmVersion": "london",
  "remappings": [
    ":@chainlink/contracts/src/=node_modules/@chainlink/contracts/src/",
    ":@ds-test/=lib/ds-test/src/",
    ":@openzeppelin/=node_modules/@openzeppelin/",
    ":@std/=lib/forge-std/src/",
    ":contracts/=contracts/",
    ":ds-test/=lib/ds-test/src/",
    ":dynamic-contracts/=lib/dynamic-contracts/src/",
    ":erc721a-upgradeable/=node_modules/erc721a-upgradeable/",
    ":erc721a/=node_modules/erc721a/",
    ":forge-std/=lib/forge-std/src/"
  ],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

[{"inputs":[{"components":[{"components":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"metadataURI","type":"string"},{"internalType":"address","name":"implementation","type":"address"}],"internalType":"struct IExtension.ExtensionMetadata","name":"metadata","type":"tuple"},{"components":[{"internalType":"bytes4","name":"functionSelector","type":"bytes4"},{"internalType":"string","name":"functionSignature","type":"string"}],"internalType":"struct IExtension.ExtensionFunction[]","name":"functions","type":"tuple[]"}],"internalType":"struct IExtension.Extension[]","name":"_extensions","type":"tuple[]"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"prevURI","type":"string"},{"indexed":false,"internalType":"string","name":"newURI","type":"string"}],"name":"ContractURIUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"newRoyaltyRecipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"newRoyaltyBps","type":"uint256"}],"name":"DefaultRoyalty","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"extensionAddress","type":"address"},{"indexed":true,"internalType":"bytes4","name":"functionSelector","type":"bytes4"},{"indexed":false,"internalType":"string","name":"functionSignature","type":"string"}],"name":"ExtensionAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"extensionAddress","type":"address"},{"indexed":true,"internalType":"bytes4","name":"functionSelector","type":"bytes4"},{"indexed":false,"internalType":"string","name":"functionSignature","type":"string"}],"name":"ExtensionRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"oldExtensionAddress","type":"address"},{"indexed":true,"internalType":"address","name":"newExtensionAddress","type":"address"},{"indexed":true,"internalType":"bytes4","name":"functionSelector","type":"bytes4"},{"indexed":false,"internalType":"string","name":"functionSignature","type":"string"}],"name":"ExtensionUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"restriction","type":"bool"}],"name":"OperatorRestriction","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"prevOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnerUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"recipient","type":"address"}],"name":"PrimarySaleRecipientUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[{"components":[{"components":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"metadataURI","type":"string"},{"internalType":"address","name":"implementation","type":"address"}],"internalType":"struct IExtension.ExtensionMetadata","name":"metadata","type":"tuple"},{"components":[{"internalType":"bytes4","name":"functionSelector","type":"bytes4"},{"internalType":"string","name":"functionSignature","type":"string"}],"internalType":"struct IExtension.ExtensionFunction[]","name":"functions","type":"tuple[]"}],"internalType":"struct IExtension.Extension","name":"_extension","type":"tuple"}],"name":"addExtension","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"defaultExtensionSet","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAllExtensions","outputs":[{"components":[{"components":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"metadataURI","type":"string"},{"internalType":"address","name":"implementation","type":"address"}],"internalType":"struct IExtension.ExtensionMetadata","name":"metadata","type":"tuple"},{"components":[{"internalType":"bytes4","name":"functionSelector","type":"bytes4"},{"internalType":"string","name":"functionSignature","type":"string"}],"internalType":"struct IExtension.ExtensionFunction[]","name":"functions","type":"tuple[]"}],"internalType":"struct IExtension.Extension[]","name":"allExtensions","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_extensionName","type":"string"}],"name":"getAllFunctionsOfExtension","outputs":[{"components":[{"internalType":"bytes4","name":"functionSelector","type":"bytes4"},{"internalType":"string","name":"functionSignature","type":"string"}],"internalType":"struct IExtension.ExtensionFunction[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_extensionName","type":"string"}],"name":"getExtension","outputs":[{"components":[{"components":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"metadataURI","type":"string"},{"internalType":"address","name":"implementation","type":"address"}],"internalType":"struct IExtension.ExtensionMetadata","name":"metadata","type":"tuple"},{"components":[{"internalType":"bytes4","name":"functionSelector","type":"bytes4"},{"internalType":"string","name":"functionSignature","type":"string"}],"internalType":"struct IExtension.ExtensionFunction[]","name":"functions","type":"tuple[]"}],"internalType":"struct IExtension.Extension","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_functionSelector","type":"bytes4"}],"name":"getExtensionForFunction","outputs":[{"components":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"metadataURI","type":"string"},{"internalType":"address","name":"implementation","type":"address"}],"internalType":"struct IExtension.ExtensionMetadata","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_extensionName","type":"string"}],"name":"getExtensionImplementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_functionSelector","type":"bytes4"}],"name":"getImplementationForFunction","outputs":[{"internalType":"address","name":"extensionAddress","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_defaultAdmin","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"string","name":"_contractURI","type":"string"},{"internalType":"address[]","name":"_trustedForwarders","type":"address[]"},{"internalType":"address","name":"_saleRecipient","type":"address"},{"internalType":"address","name":"_royaltyRecipient","type":"address"},{"internalType":"uint16","name":"_royaltyBps","type":"uint16"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"forwarder","type":"address"}],"name":"isTrustedForwarder","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_extensionName","type":"string"}],"name":"removeExtension","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"components":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"metadataURI","type":"string"},{"internalType":"address","name":"implementation","type":"address"}],"internalType":"struct IExtension.ExtensionMetadata","name":"metadata","type":"tuple"},{"components":[{"internalType":"bytes4","name":"functionSelector","type":"bytes4"},{"internalType":"string","name":"functionSignature","type":"string"}],"internalType":"struct IExtension.ExtensionFunction[]","name":"functions","type":"tuple[]"}],"internalType":"struct IExtension.Extension","name":"_extension","type":"tuple"}],"name":"updateExtension","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]