// File: src/FloorDropMintpass.sol



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

/// @author weiz

import "./base/ERC1155Drop.sol";
import "./extension/interface/IClaimCondition.sol";

/**
 * The FloorDropMintpass contract is a drop contract that implements the ERC1155 standard. It extends the ERC1155Drop
 * contract and adds the ability to specify a different primary sale recipient for each token.
 */

contract FloorDropMintpass is ERC1155Drop {

    address public constant SHARE_RECEIVER_ADDRESS = 0xaE1F01F1E9F72D8bC7AF9E0f8F91D1566C70D494;

    /*///////////////////////////////////////////////////////////////
                                Mappings
    //////////////////////////////////////////////////////////////*/

    /// @dev Mapping from tokenId => artist recipient address
    mapping(uint256 => address) public primarySaleRecipient;

    constructor(
        string memory _name,
        string memory _symbol,
        address _royaltyRecipient,
        uint128 _royaltyBps,
        address _primarySaleRecipient
    ) ERC1155Drop(_name, _symbol, _royaltyRecipient, _royaltyBps, _primarySaleRecipient) {

    }

    /// @dev Lets an account claim tokens.
    function claim(
        address _receiver,
        uint256 _tokenId,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof,
        bytes memory _data
    ) public payable virtual override {
        require(primarySaleRecipient[_tokenId] != address(0), "Primary Sale Recipient not set");
        _beforeClaim(_tokenId, _receiver, _quantity, _currency, _pricePerToken, _allowlistProof, _data);

        ClaimCondition memory condition = claimCondition[_tokenId];
        bytes32 activeConditionId = conditionId[_tokenId];

        verifyClaim(_tokenId, _dropMsgSender(), _quantity, _currency, _pricePerToken, _allowlistProof);

        // Update contract state.
        condition.supplyClaimed += _quantity;
        supplyClaimedByWallet[activeConditionId][_dropMsgSender()] += _quantity;
        claimCondition[_tokenId] = condition;

        // If there's a price, collect price.
        address artistRecipient = primarySaleRecipient[_tokenId];
        _collectPriceOnClaim(artistRecipient, _quantity, _currency, _pricePerToken);

        // Mint the relevant NFTs to claimer.
        _transferTokensOnClaim(_receiver, _tokenId, _quantity);

        emit TokensClaimed(_dropMsgSender(), _receiver, _tokenId, _quantity);

        _afterClaim(_tokenId, _receiver, _quantity, _currency, _pricePerToken, _allowlistProof, _data);
    }

    /// @dev Collects and distributes the primary sale value of NFTs being claimed.
    function _collectPriceOnClaim(
        address _primarySaleRecipient,
        uint256 _quantityToClaim,
        address _currency,
        uint256 _pricePerToken
    ) internal virtual override {
        if (_pricePerToken == 0) {
            return;
        }

        uint256 totalPrice = _quantityToClaim * _pricePerToken;

        if (_currency == CurrencyTransferLib.NATIVE_TOKEN) {
            if (msg.value != totalPrice) {
                revert("Must send total price.");
            }
        }

        // split the price between the artist and Nifty Music
        uint256 artistPrice = (totalPrice * 80) / 100;
        uint256 nmPrice = totalPrice - artistPrice;

        CurrencyTransferLib.transferCurrency(_currency, msg.sender, _primarySaleRecipient, artistPrice);
        CurrencyTransferLib.transferCurrency(_currency, msg.sender, SHARE_RECEIVER_ADDRESS, nmPrice);
    }

    /// @dev Sets the primary sale recipient for a token.
    function setPrimarySaleRecipient(uint256 _tokenId, address _primarySaleRecipient) external onlyOwner {
        primarySaleRecipient[_tokenId] = _primarySaleRecipient;
    }
}
// File: src/base/ERC1155Drop.sol



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

/// @author thirdweb

import { ERC1155 } from "../eip/ERC1155.sol";

import "../extension/ContractMetadata.sol";
import "../extension/Multicall.sol";
import "../extension/Ownable.sol";
import "../extension/Royalty.sol";
import "../extension/BatchMintMetadata.sol";
import "../extension/PrimarySale.sol";
import "../extension/DropSinglePhase1155.sol";
import "../extension/LazyMint.sol";
import "../extension/DelayedReveal.sol";
import "../extension/DefaultOperatorFilterer.sol";

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

/**
 *      BASE:      ERC1155Base
 *      EXTENSION: DropSinglePhase1155
 *
 *  The `ERC1155Base` smart contract implements the ERC1155 NFT standard.
 *  It includes the following additions to standard ERC1155 logic:
 *
 *      - Contract metadata for royalty support on platforms such as OpenSea that use
 *        off-chain information to distribute roaylties.
 *
 *      - Ownership of the contract, with the ability to restrict certain functions to
 *        only be called by the contract's owner.
 *
 *      - Multicall capability to perform multiple actions atomically
 *
 *      - EIP 2981 compliance for royalty support on NFT marketplaces.
 *
 *  The `drop` mechanism in the `DropSinglePhase1155` extension is a distribution mechanism for lazy minted tokens. It lets
 *  you set restrictions such as a price to charge, an allowlist etc. when an address atttempts to mint lazy minted tokens.
 *
 *  The `ERC721Drop` contract lets you lazy mint tokens, and distribute those lazy minted tokens via the drop mechanism.
 */

contract ERC1155Drop is
    ERC1155,
    ContractMetadata,
    Ownable,
    Royalty,
    Multicall,
    BatchMintMetadata,
    PrimarySale,
    LazyMint,
    DelayedReveal,
    DropSinglePhase1155,
    DefaultOperatorFilterer
{
    using TWStrings for uint256;

    /*//////////////////////////////////////////////////////////////
                        Mappings
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice Returns the total supply of NFTs of a given tokenId
     *  @dev Mapping from tokenId => total circulating supply of NFTs of that tokenId.
     */
    mapping(uint256 => uint256) public totalSupply;

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

    constructor(
        string memory _name,
        string memory _symbol,
        address _royaltyRecipient,
        uint128 _royaltyBps,
        address _primarySaleRecipient
    ) ERC1155(_name, _symbol) {
        _setupOwner(msg.sender);
        _setupDefaultRoyaltyInfo(_royaltyRecipient, _royaltyBps);
        _setupPrimarySaleRecipient(_primarySaleRecipient);
        _setOperatorRestriction(true);
    }

    /*//////////////////////////////////////////////////////////////
                            ERC165 Logic
    //////////////////////////////////////////////////////////////*/

    /// @notice Returns whether this contract supports the given interface.
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC1155, IERC165) returns (bool) {
        return
            interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
            interfaceId == 0xd9b67a26 || // ERC165 Interface ID for ERC1155
            interfaceId == 0x0e89341c || // ERC165 Interface ID for ERC1155MetadataURI
            interfaceId == type(IERC2981).interfaceId; // ERC165 ID for ERC2981
    }

    /*//////////////////////////////////////////////////////////////
                        Minting/burning logic
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice         Lets an owner or approved operator burn NFTs of the given tokenId.
     *
     *  @param _owner   The owner of the NFT to burn.
     *  @param _tokenId The tokenId of the NFT to burn.
     *  @param _amount  The amount of the NFT to burn.
     */
    function burn(
        address _owner,
        uint256 _tokenId,
        uint256 _amount
    ) external virtual {
        address caller = msg.sender;

        require(caller == _owner || isApprovedForAll[_owner][caller], "Unapproved caller");
        require(balanceOf[_owner][_tokenId] >= _amount, "Not enough tokens owned");

        _burn(_owner, _tokenId, _amount);
    }

    /**
     *  @notice         Lets an owner or approved operator burn NFTs of the given tokenIds.
     *
     *  @param _owner    The owner of the NFTs to burn.
     *  @param _tokenIds The tokenIds of the NFTs to burn.
     *  @param _amounts  The amounts of the NFTs to burn.
     */
    function burnBatch(
        address _owner,
        uint256[] memory _tokenIds,
        uint256[] memory _amounts
    ) external virtual {
        address caller = msg.sender;

        require(caller == _owner || isApprovedForAll[_owner][caller], "Unapproved caller");
        require(_tokenIds.length == _amounts.length, "Length mismatch");

        for (uint256 i = 0; i < _tokenIds.length; i += 1) {
            require(balanceOf[_owner][_tokenIds[i]] >= _amounts[i], "Not enough tokens owned");
        }

        _burnBatch(_owner, _tokenIds, _amounts);
    }

    /*///////////////////////////////////////////////////////////////
                    Overriden metadata logic
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice         Returns the metadata URI for an NFT.
     *  @dev            See `BatchMintMetadata` for handling of metadata in this contract.
     *
     *  @param _tokenId The tokenId of an NFT.
     */
    function uri(uint256 _tokenId) public view virtual override returns (string memory) {
        (uint256 batchId, ) = _getBatchId(_tokenId);
        string memory batchUri = _getBaseURI(_tokenId);

        if (isEncryptedBatch(batchId)) {
            return string(abi.encodePacked(batchUri, "0"));
        } else {
            return string(abi.encodePacked(batchUri, _tokenId.toString()));
        }
    }

    /*///////////////////////////////////////////////////////////////
                        Delayed reveal logic
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice       Lets an authorized address reveal a batch of delayed reveal NFTs.
     *
     *  @param _index The ID for the batch of delayed-reveal NFTs to reveal.
     *  @param _key   The key with which the base URI for the relevant batch of NFTs was encrypted.
     */
    function reveal(uint256 _index, bytes calldata _key) public virtual override returns (string memory revealedURI) {
        require(_canReveal(), "Not authorized");

        uint256 batchId = getBatchIdAtIndex(_index);
        revealedURI = getRevealURI(batchId, _key);

        _setEncryptedData(batchId, "");
        _setBaseURI(batchId, revealedURI);

        emit TokenURIRevealed(_index, revealedURI);
    }

    /*///////////////////////////////////////////////////////////////
                    Overriden lazy minting logic
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice                  Lets an authorized address lazy mint a given amount of NFTs.
     *
     *  @param _amount           The number of NFTs to lazy mint.
     *  @param _baseURIForTokens The placeholder base URI for the 'n' number of NFTs being lazy minted, where the
     *                           metadata for each of those NFTs is `${baseURIForTokens}/${tokenId}`.
     *  @param _data             The encrypted base URI + provenance hash for the batch of NFTs being lazy minted.
     *  @return batchId          A unique integer identifier for the batch of NFTs lazy minted together.
     */
    function lazyMint(
        uint256 _amount,
        string calldata _baseURIForTokens,
        bytes calldata _data
    ) public virtual override returns (uint256 batchId) {
        if (_data.length > 0) {
            (bytes memory encryptedURI, bytes32 provenanceHash) = abi.decode(_data, (bytes, bytes32));
            if (encryptedURI.length != 0 && provenanceHash != "") {
                _setEncryptedData(nextTokenIdToLazyMint + _amount, _data);
            }
        }

        return LazyMint.lazyMint(_amount, _baseURIForTokens, _data);
    }

    /// @notice The tokenId assigned to the next new NFT to be lazy minted.
    function nextTokenIdToMint() public view virtual returns (uint256) {
        return nextTokenIdToLazyMint;
    }

    /*//////////////////////////////////////////////////////////////
                        ERC-1155 overrides
    //////////////////////////////////////////////////////////////*/

    /// @dev See {ERC1155-setApprovalForAll}
    function setApprovalForAll(address operator, bool approved)
        public
        virtual
        override(ERC1155)
        onlyAllowedOperatorApproval(operator)
    {
        super.setApprovalForAll(operator, approved);
    }

    /**
     * @dev See {IERC1155-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) public virtual override(ERC1155) onlyAllowedOperator(from) {
        super.safeTransferFrom(from, to, id, amount, data);
    }

    /**
     * @dev See {IERC1155-safeBatchTransferFrom}.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) public virtual override(ERC1155) onlyAllowedOperator(from) {
        super.safeBatchTransferFrom(from, to, ids, amounts, data);
    }

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

    /// @dev Runs before every `claim` function call.
    function _beforeClaim(
        uint256 _tokenId,
        address,
        uint256,
        address,
        uint256,
        AllowlistProof calldata,
        bytes memory
    ) internal view virtual override {
        if (_tokenId >= nextTokenIdToLazyMint) {
            revert("Not enough minted tokens");
        }
    }

    /// @dev Collects and distributes the primary sale value of NFTs being claimed.
    function _collectPriceOnClaim(
        address _primarySaleRecipient,
        uint256 _quantityToClaim,
        address _currency,
        uint256 _pricePerToken
    ) internal virtual override {
        if (_pricePerToken == 0) {
            return;
        }

        uint256 totalPrice = _quantityToClaim * _pricePerToken;

        if (_currency == CurrencyTransferLib.NATIVE_TOKEN) {
            if (msg.value != totalPrice) {
                revert("Must send total price.");
            }
        }

        address saleRecipient = _primarySaleRecipient == address(0) ? primarySaleRecipient() : _primarySaleRecipient;
        CurrencyTransferLib.transferCurrency(_currency, msg.sender, saleRecipient, totalPrice);
    }

    /// @dev Transfers the NFTs being claimed.
    function _transferTokensOnClaim(
        address _to,
        uint256 _tokenId,
        uint256 _quantityBeingClaimed
    ) internal virtual override {
        _mint(_to, _tokenId, _quantityBeingClaimed, "");
    }

    /// @dev Runs before every token transfer / mint / burn.
    function _beforeTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual override {
        super._beforeTokenTransfer(operator, from, to, ids, amounts, data);

        if (from == address(0)) {
            for (uint256 i = 0; i < ids.length; ++i) {
                totalSupply[ids[i]] += amounts[i];
            }
        }

        if (to == address(0)) {
            for (uint256 i = 0; i < ids.length; ++i) {
                totalSupply[ids[i]] -= amounts[i];
            }
        }
    }

    /// @dev Checks whether primary sale recipient can be set in the given execution context.
    function _canSetPrimarySaleRecipient() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Checks whether owner can be set in the given execution context.
    function _canSetOwner() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Checks whether royalty info can be set in the given execution context.
    function _canSetRoyaltyInfo() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Checks whether contract metadata can be set in the given execution context.
    function _canSetContractURI() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Checks whether platform fee info can be set in the given execution context.
    function _canSetClaimConditions() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Returns whether lazy minting can be done in the given execution context.
    function _canLazyMint() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Returns whether operator restriction can be set in the given execution context.
    function _canSetOperatorRestriction() internal virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Checks whether NFTs can be revealed in the given execution context.
    function _canReveal() internal view virtual returns (bool) {
        return msg.sender == owner();
    }
}
// File: src/eip/ERC1155.sol



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

import "./interface/IERC1155.sol";
import "./interface/IERC1155Metadata.sol";
import "./interface/IERC1155Receiver.sol";

contract ERC1155 is IERC1155, IERC1155Metadata {
    /*//////////////////////////////////////////////////////////////
                        State variables
    //////////////////////////////////////////////////////////////*/

    string public name;
    string public symbol;

    /*//////////////////////////////////////////////////////////////
                            Mappings
    //////////////////////////////////////////////////////////////*/

    mapping(address => mapping(uint256 => uint256)) public balanceOf;

    mapping(address => mapping(address => bool)) public isApprovedForAll;

    mapping(uint256 => string) internal _uri;

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

    constructor(string memory _name, string memory _symbol) {
        name = _name;
        symbol = _symbol;
    }

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

    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return
            interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
            interfaceId == 0xd9b67a26 || // ERC165 Interface ID for ERC1155
            interfaceId == 0x0e89341c; // ERC165 Interface ID for ERC1155MetadataURI
    }

    function uri(uint256 tokenId) public view virtual override returns (string memory) {
        return _uri[tokenId];
    }

    function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
        public
        view
        virtual
        override
        returns (uint256[] memory)
    {
        require(accounts.length == ids.length, "LENGTH_MISMATCH");

        uint256[] memory batchBalances = new uint256[](accounts.length);

        for (uint256 i = 0; i < accounts.length; ++i) {
            batchBalances[i] = balanceOf[accounts[i]][ids[i]];
        }

        return batchBalances;
    }

    /*//////////////////////////////////////////////////////////////
                            ERC1155 logic
    //////////////////////////////////////////////////////////////*/

    function setApprovalForAll(address operator, bool approved) public virtual override {
        address owner = msg.sender;
        require(owner != operator, "APPROVING_SELF");
        isApprovedForAll[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) public virtual override {
        require(from == msg.sender || isApprovedForAll[from][msg.sender], "!OWNER_OR_APPROVED");
        _safeTransferFrom(from, to, id, amount, data);
    }

    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) public virtual override {
        require(from == msg.sender || isApprovedForAll[from][msg.sender], "!OWNER_OR_APPROVED");
        _safeBatchTransferFrom(from, to, ids, amounts, data);
    }

    /*//////////////////////////////////////////////////////////////
                            Internal logic
    //////////////////////////////////////////////////////////////*/

    function _safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "TO_ZERO_ADDR");

        address operator = msg.sender;

        _beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);

        uint256 fromBalance = balanceOf[from][id];
        require(fromBalance >= amount, "INSUFFICIENT_BAL");
        unchecked {
            balanceOf[from][id] = fromBalance - amount;
        }
        balanceOf[to][id] += amount;

        emit TransferSingle(operator, from, to, id, amount);

        _doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
    }

    function _safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {
        require(ids.length == amounts.length, "LENGTH_MISMATCH");
        require(to != address(0), "TO_ZERO_ADDR");

        address operator = msg.sender;

        _beforeTokenTransfer(operator, from, to, ids, amounts, data);

        for (uint256 i = 0; i < ids.length; ++i) {
            uint256 id = ids[i];
            uint256 amount = amounts[i];

            uint256 fromBalance = balanceOf[from][id];
            require(fromBalance >= amount, "INSUFFICIENT_BAL");
            unchecked {
                balanceOf[from][id] = fromBalance - amount;
            }
            balanceOf[to][id] += amount;
        }

        emit TransferBatch(operator, from, to, ids, amounts);

        _doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
    }

    function _setTokenURI(uint256 tokenId, string memory newuri) internal virtual {
        _uri[tokenId] = newuri;
    }

    function _mint(
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "TO_ZERO_ADDR");

        address operator = msg.sender;

        _beforeTokenTransfer(operator, address(0), to, _asSingletonArray(id), _asSingletonArray(amount), data);

        balanceOf[to][id] += amount;
        emit TransferSingle(operator, address(0), to, id, amount);

        _doSafeTransferAcceptanceCheck(operator, address(0), to, id, amount, data);
    }

    function _mintBatch(
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "TO_ZERO_ADDR");
        require(ids.length == amounts.length, "LENGTH_MISMATCH");

        address operator = msg.sender;

        _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);

        for (uint256 i = 0; i < ids.length; i++) {
            balanceOf[to][ids[i]] += amounts[i];
        }

        emit TransferBatch(operator, address(0), to, ids, amounts);

        _doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
    }

    function _burn(
        address from,
        uint256 id,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "FROM_ZERO_ADDR");

        address operator = msg.sender;

        _beforeTokenTransfer(operator, from, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");

        uint256 fromBalance = balanceOf[from][id];
        require(fromBalance >= amount, "INSUFFICIENT_BAL");
        unchecked {
            balanceOf[from][id] = fromBalance - amount;
        }

        emit TransferSingle(operator, from, address(0), id, amount);
    }

    function _burnBatch(
        address from,
        uint256[] memory ids,
        uint256[] memory amounts
    ) internal virtual {
        require(from != address(0), "FROM_ZERO_ADDR");
        require(ids.length == amounts.length, "LENGTH_MISMATCH");

        address operator = msg.sender;

        _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");

        for (uint256 i = 0; i < ids.length; i++) {
            uint256 id = ids[i];
            uint256 amount = amounts[i];

            uint256 fromBalance = balanceOf[from][id];
            require(fromBalance >= amount, "INSUFFICIENT_BAL");
            unchecked {
                balanceOf[from][id] = fromBalance - amount;
            }
        }

        emit TransferBatch(operator, from, address(0), ids, amounts);
    }

    function _beforeTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {}

    function _doSafeTransferAcceptanceCheck(
        address operator,
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) private {
        if (to.code.length > 0) {
            try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
                if (response != IERC1155Receiver.onERC1155Received.selector) {
                    revert("TOKENS_REJECTED");
                }
            } catch Error(string memory reason) {
                revert(reason);
            } catch {
                revert("!ERC1155RECEIVER");
            }
        }
    }

    function _doSafeBatchTransferAcceptanceCheck(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) private {
        if (to.code.length > 0) {
            try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (
                bytes4 response
            ) {
                if (response != IERC1155Receiver.onERC1155BatchReceived.selector) {
                    revert("TOKENS_REJECTED");
                }
            } catch Error(string memory reason) {
                revert(reason);
            } catch {
                revert("!ERC1155RECEIVER");
            }
        }
    }

    function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
        uint256[] memory array = new uint256[](1);
        array[0] = element;

        return array;
    }
}

// File: src/eip/interface/IERC1155.sol



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

/**
    @title ERC-1155 Multi Token Standard
    @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1155.md
    Note: The ERC-165 identifier for this interface is 0xd9b67a26.
 */
interface IERC1155 {
    /**
        @dev Either `TransferSingle` or `TransferBatch` MUST emit when tokens are transferred, including zero value transfers as well as minting or burning (see "Safe Transfer Rules" section of the standard).
        The `_operator` argument MUST be msg.sender.
        The `_from` argument MUST be the address of the holder whose balance is decreased.
        The `_to` argument MUST be the address of the recipient whose balance is increased.
        The `_id` argument MUST be the token type being transferred.
        The `_value` argument MUST be the number of tokens the holder balance is decreased by and match what the recipient balance is increased by.
        When minting/creating tokens, the `_from` argument MUST be set to `0x0` (i.e. zero address).
        When burning/destroying tokens, the `_to` argument MUST be set to `0x0` (i.e. zero address).
    */
    event TransferSingle(
        address indexed _operator,
        address indexed _from,
        address indexed _to,
        uint256 _id,
        uint256 _value
    );

    /**
        @dev Either `TransferSingle` or `TransferBatch` MUST emit when tokens are transferred, including zero value transfers as well as minting or burning (see "Safe Transfer Rules" section of the standard).
        The `_operator` argument MUST be msg.sender.
        The `_from` argument MUST be the address of the holder whose balance is decreased.
        The `_to` argument MUST be the address of the recipient whose balance is increased.
        The `_ids` argument MUST be the list of tokens being transferred.
        The `_values` argument MUST be the list of number of tokens (matching the list and order of tokens specified in _ids) the holder balance is decreased by and match what the recipient balance is increased by.
        When minting/creating tokens, the `_from` argument MUST be set to `0x0` (i.e. zero address).
        When burning/destroying tokens, the `_to` argument MUST be set to `0x0` (i.e. zero address).
    */
    event TransferBatch(
        address indexed _operator,
        address indexed _from,
        address indexed _to,
        uint256[] _ids,
        uint256[] _values
    );

    /**
        @dev MUST emit when approval for a second party/operator address to manage all tokens for an owner address is enabled or disabled (absense of an event assumes disabled).
    */
    event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);

    /**
        @dev MUST emit when the URI is updated for a token ID.
        URIs are defined in RFC 3986.
        The URI MUST point a JSON file that conforms to the "ERC-1155 Metadata URI JSON Schema".
    */
    event URI(string _value, uint256 indexed _id);

    /**
        @notice Transfers `_value` amount of an `_id` from the `_from` address to the `_to` address specified (with safety call).
        @dev Caller must be approved to manage the tokens being transferred out of the `_from` account (see "Approval" section of the standard).
        MUST revert if `_to` is the zero address.
        MUST revert if balance of holder for token `_id` is lower than the `_value` sent.
        MUST revert on any other error.
        MUST emit the `TransferSingle` event to reflect the balance change (see "Safe Transfer Rules" section of the standard).
        After the above conditions are met, this function MUST check if `_to` is a smart contract (e.g. code size > 0). If so, it MUST call `onERC1155Received` on `_to` and act appropriately (see "Safe Transfer Rules" section of the standard).
        @param _from    Source address
        @param _to      Target address
        @param _id      ID of the token type
        @param _value   Transfer amount
        @param _data    Additional data with no specified format, MUST be sent unaltered in call to `onERC1155Received` on `_to`
    */
    function safeTransferFrom(
        address _from,
        address _to,
        uint256 _id,
        uint256 _value,
        bytes calldata _data
    ) external;

    /**
        @notice Transfers `_values` amount(s) of `_ids` from the `_from` address to the `_to` address specified (with safety call).
        @dev Caller must be approved to manage the tokens being transferred out of the `_from` account (see "Approval" section of the standard).
        MUST revert if `_to` is the zero address.
        MUST revert if length of `_ids` is not the same as length of `_values`.
        MUST revert if any of the balance(s) of the holder(s) for token(s) in `_ids` is lower than the respective amount(s) in `_values` sent to the recipient.
        MUST revert on any other error.
        MUST emit `TransferSingle` or `TransferBatch` event(s) such that all the balance changes are reflected (see "Safe Transfer Rules" section of the standard).
        Balance changes and events MUST follow the ordering of the arrays (_ids[0]/_values[0] before _ids[1]/_values[1], etc).
        After the above conditions for the transfer(s) in the batch are met, this function MUST check if `_to` is a smart contract (e.g. code size > 0). If so, it MUST call the relevant `ERC1155TokenReceiver` hook(s) on `_to` and act appropriately (see "Safe Transfer Rules" section of the standard).
        @param _from    Source address
        @param _to      Target address
        @param _ids     IDs of each token type (order and length must match _values array)
        @param _values  Transfer amounts per token type (order and length must match _ids array)
        @param _data    Additional data with no specified format, MUST be sent unaltered in call to the `ERC1155TokenReceiver` hook(s) on `_to`
    */
    function safeBatchTransferFrom(
        address _from,
        address _to,
        uint256[] calldata _ids,
        uint256[] calldata _values,
        bytes calldata _data
    ) external;

    /**
        @notice Get the balance of an account's Tokens.
        @param _owner  The address of the token holder
        @param _id     ID of the Token
        @return        The _owner's balance of the Token type requested
     */
    function balanceOf(address _owner, uint256 _id) external view returns (uint256);

    /**
        @notice Get the balance of multiple account/token pairs
        @param _owners The addresses of the token holders
        @param _ids    ID of the Tokens
        @return        The _owner's balance of the Token types requested (i.e. balance for each (owner, id) pair)
     */
    function balanceOfBatch(address[] calldata _owners, uint256[] calldata _ids)
        external
        view
        returns (uint256[] memory);

    /**
        @notice Enable or disable approval for a third party ("operator") to manage all of the caller's tokens.
        @dev MUST emit the ApprovalForAll event on success.
        @param _operator  Address to add to the set of authorized operators
        @param _approved  True if the operator is approved, false to revoke approval
    */
    function setApprovalForAll(address _operator, bool _approved) external;

    /**
        @notice Queries the approval status of an operator for a given owner.
        @param _owner     The owner of the Tokens
        @param _operator  Address of authorized operator
        @return           True if the operator is approved, false if not
    */
    function isApprovedForAll(address _owner, address _operator) external view returns (bool);
}

// File: src/eip/interface/IERC1155Metadata.sol



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

/**
    Note: The ERC-165 identifier for this interface is 0x0e89341c.
*/
interface IERC1155Metadata {
    /**
        @notice A distinct Uniform Resource Identifier (URI) for a given token.
        @dev URIs are defined in RFC 3986.
        The URI may point to a JSON file that conforms to the "ERC-1155 Metadata URI JSON Schema".
        @return URI string
    */
    function uri(uint256 _id) external view returns (string memory);
}

// File: src/eip/interface/IERC1155Receiver.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// File: src/eip/interface/IERC165.sol



// 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);
}

// File: src/eip/interface/IERC20.sol



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

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
interface IERC20 {
    function totalSupply() external view returns (uint256);

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

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

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

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

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

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: src/eip/interface/IERC2981.sol



// 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);
}

// File: src/extension/BatchMintMetadata.sol



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

/// @author thirdweb

/**
 *  @title   Batch-mint Metadata
 *  @notice  The `BatchMintMetadata` is a contract extension for any base NFT contract. It lets the smart contract
 *           using this extension set metadata for `n` number of NFTs all at once. This is enabled by storing a single
 *           base URI for a batch of `n` NFTs, where the metadata for each NFT in a relevant batch is `baseURI/tokenId`.
 */

contract BatchMintMetadata {
    /// @dev Largest tokenId of each batch of tokens with the same baseURI.
    uint256[] private batchIds;

    /// @dev Mapping from id of a batch of tokens => to base URI for the respective batch of tokens.
    mapping(uint256 => string) private baseURI;

    /**
     *  @notice         Returns the count of batches of NFTs.
     *  @dev            Each batch of tokens has an in ID and an associated `baseURI`.
     *                  See {batchIds}.
     */
    function getBaseURICount() public view returns (uint256) {
        return batchIds.length;
    }

    /**
     *  @notice         Returns the ID for the batch of tokens the given tokenId belongs to.
     *  @dev            See {getBaseURICount}.
     *  @param _index   ID of a token.
     */
    function getBatchIdAtIndex(uint256 _index) public view returns (uint256) {
        if (_index >= getBaseURICount()) {
            revert("Invalid index");
        }
        return batchIds[_index];
    }

    /// @dev Returns the id for the batch of tokens the given tokenId belongs to.
    function _getBatchId(uint256 _tokenId) internal view returns (uint256 batchId, uint256 index) {
        uint256 numOfTokenBatches = getBaseURICount();
        uint256[] memory indices = batchIds;

        for (uint256 i = 0; i < numOfTokenBatches; i += 1) {
            if (_tokenId < indices[i]) {
                index = i;
                batchId = indices[i];

                return (batchId, index);
            }
        }

        revert("Invalid tokenId");
    }

    /// @dev Returns the baseURI for a token. The intended metadata URI for the token is baseURI + tokenId.
    function _getBaseURI(uint256 _tokenId) internal view returns (string memory) {
        uint256 numOfTokenBatches = getBaseURICount();
        uint256[] memory indices = batchIds;

        for (uint256 i = 0; i < numOfTokenBatches; i += 1) {
            if (_tokenId < indices[i]) {
                return baseURI[indices[i]];
            }
        }
        revert("Invalid tokenId");
    }

    /// @dev Sets the base URI for the batch of tokens with the given batchId.
    function _setBaseURI(uint256 _batchId, string memory _baseURI) internal {
        baseURI[_batchId] = _baseURI;
    }

    /// @dev Mints a batch of tokenIds and associates a common baseURI to all those Ids.
    function _batchMintMetadata(
        uint256 _startId,
        uint256 _amountToMint,
        string memory _baseURIForTokens
    ) internal returns (uint256 nextTokenIdToMint, uint256 batchId) {
        batchId = _startId + _amountToMint;
        nextTokenIdToMint = batchId;

        batchIds.push(batchId);

        baseURI[batchId] = _baseURIForTokens;
    }
}

// File: src/extension/ContractMetadata.sol



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

/// @author thirdweb

import "./interface/IContractMetadata.sol";

/**
 *  @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.
 */

abstract contract ContractMetadata is IContractMetadata {
    /// @notice Returns the contract metadata URI.
    string public override contractURI;

    /**
     *  @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 {
        string memory prevURI = contractURI;
        contractURI = _uri;

        emit ContractURIUpdated(prevURI, _uri);
    }

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

// File: src/extension/DefaultOperatorFilterer.sol



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

/// @author thirdweb

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

/**
 * @title  DefaultOperatorFilterer
 * @notice Inherits from OperatorFilterer and automatically subscribes to the default OpenSea subscription.
 */
abstract contract DefaultOperatorFilterer is OperatorFilterer {
    address constant DEFAULT_SUBSCRIPTION = address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6);

    constructor() OperatorFilterer(DEFAULT_SUBSCRIPTION, true) {}
}

// File: src/extension/DelayedReveal.sol



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

/// @author thirdweb

import "./interface/IDelayedReveal.sol";

/**
 *  @title   Delayed Reveal
 *  @notice  Thirdweb's `DelayedReveal` is a contract extension for base NFT contracts. It lets you create batches of
 *           'delayed-reveal' NFTs. You can learn more about the usage of delayed reveal NFTs here - https://blog.thirdweb.com/delayed-reveal-nfts
 */

abstract contract DelayedReveal is IDelayedReveal {
    /// @dev Mapping from tokenId of a batch of tokens => to delayed reveal data.
    mapping(uint256 => bytes) public encryptedData;

    /// @dev Sets the delayed reveal data for a batchId.
    function _setEncryptedData(uint256 _batchId, bytes memory _encryptedData) internal {
        encryptedData[_batchId] = _encryptedData;
    }

    /**
     *  @notice             Returns revealed URI for a batch of NFTs.
     *  @dev                Reveal encrypted base URI for `_batchId` with caller/admin's `_key` used for encryption.
     *                      Reverts if there's no encrypted URI for `_batchId`.
     *                      See {encryptDecrypt}.
     *
     *  @param _batchId     ID of the batch for which URI is being revealed.
     *  @param _key         Secure key used by caller/admin for encryption of baseURI.
     *
     *  @return revealedURI Decrypted base URI.
     */
    function getRevealURI(uint256 _batchId, bytes calldata _key) public view returns (string memory revealedURI) {
        bytes memory data = encryptedData[_batchId];
        if (data.length == 0) {
            revert("Nothing to reveal");
        }

        (bytes memory encryptedURI, bytes32 provenanceHash) = abi.decode(data, (bytes, bytes32));

        revealedURI = string(encryptDecrypt(encryptedURI, _key));

        require(keccak256(abi.encodePacked(revealedURI, _key, block.chainid)) == provenanceHash, "Incorrect key");
    }

    /**
     *  @notice         Encrypt/decrypt data on chain.
     *  @dev            Encrypt/decrypt given `data` with `key`. Uses inline assembly.
     *                  See: https://ethereum.stackexchange.com/questions/69825/decrypt-message-on-chain
     *
     *  @param data     Bytes of data to encrypt/decrypt.
     *  @param key      Secure key used by caller for encryption/decryption.
     *
     *  @return result  Output after encryption/decryption of given data.
     */
    function encryptDecrypt(bytes memory data, bytes calldata key) public pure override returns (bytes memory result) {
        // Store data length on stack for later use
        uint256 length = data.length;

        // solhint-disable-next-line no-inline-assembly
        assembly {
            // Set result to free memory pointer
            result := mload(0x40)
            // Increase free memory pointer by lenght + 32
            mstore(0x40, add(add(result, length), 32))
            // Set result length
            mstore(result, length)
        }

        // Iterate over the data stepping by 32 bytes
        for (uint256 i = 0; i < length; i += 32) {
            // Generate hash of the key and offset
            bytes32 hash = keccak256(abi.encodePacked(key, i));

            bytes32 chunk;
            // solhint-disable-next-line no-inline-assembly
            assembly {
                // Read 32-bytes data chunk
                chunk := mload(add(data, add(i, 32)))
            }
            // XOR the chunk with hash
            chunk ^= hash;
            // solhint-disable-next-line no-inline-assembly
            assembly {
                // Write 32-byte encrypted chunk
                mstore(add(result, add(i, 32)), chunk)
            }
        }
    }

    /**
     *  @notice         Returns whether the relvant batch of NFTs is subject to a delayed reveal.
     *  @dev            Returns `true` if `_batchId`'s base URI is encrypted.
     *  @param _batchId ID of a batch of NFTs.
     */
    function isEncryptedBatch(uint256 _batchId) public view returns (bool) {
        return encryptedData[_batchId].length > 0;
    }
}

// File: src/extension/DropSinglePhase1155.sol



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

/// @author thirdweb

import "./interface/IDropSinglePhase1155.sol";
import "../lib/MerkleProof.sol";

abstract contract DropSinglePhase1155 is IDropSinglePhase1155 {
    /*///////////////////////////////////////////////////////////////
                                Mappings
    //////////////////////////////////////////////////////////////*/

    /// @dev Mapping from tokenId => active claim condition for the tokenId.
    mapping(uint256 => ClaimCondition) public claimCondition;

    /// @dev Mapping from tokenId => active claim condition's UID.
    mapping(uint256 => bytes32) internal conditionId;

    /**
     *  @dev Map from a claim condition uid and account to supply claimed by account.
     */
    mapping(bytes32 => mapping(address => uint256)) internal supplyClaimedByWallet;

    /*///////////////////////////////////////////////////////////////
                            Drop logic
    //////////////////////////////////////////////////////////////*/

    /// @dev Lets an account claim tokens.
    function claim(
        address _receiver,
        uint256 _tokenId,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof,
        bytes memory _data
    ) public payable virtual override {
        _beforeClaim(_tokenId, _receiver, _quantity, _currency, _pricePerToken, _allowlistProof, _data);

        ClaimCondition memory condition = claimCondition[_tokenId];
        bytes32 activeConditionId = conditionId[_tokenId];

        verifyClaim(_tokenId, _dropMsgSender(), _quantity, _currency, _pricePerToken, _allowlistProof);

        // Update contract state.
        condition.supplyClaimed += _quantity;
        supplyClaimedByWallet[activeConditionId][_dropMsgSender()] += _quantity;
        claimCondition[_tokenId] = condition;

        // If there's a price, collect price.
        _collectPriceOnClaim(address(0), _quantity, _currency, _pricePerToken);

        // Mint the relevant NFTs to claimer.
        _transferTokensOnClaim(_receiver, _tokenId, _quantity);

        emit TokensClaimed(_dropMsgSender(), _receiver, _tokenId, _quantity);

        _afterClaim(_tokenId, _receiver, _quantity, _currency, _pricePerToken, _allowlistProof, _data);
    }

    /// @dev Lets a contract admin set claim conditions.
    function setClaimConditions(
        uint256 _tokenId,
        ClaimCondition calldata _condition,
        bool _resetClaimEligibility
    ) external override {
        if (!_canSetClaimConditions()) {
            revert("Not authorized");
        }

        ClaimCondition memory condition = claimCondition[_tokenId];
        bytes32 targetConditionId = conditionId[_tokenId];

        uint256 supplyClaimedAlready = condition.supplyClaimed;

        if (targetConditionId == bytes32(0) || _resetClaimEligibility) {
            supplyClaimedAlready = 0;
            targetConditionId = keccak256(abi.encodePacked(_dropMsgSender(), block.number, _tokenId));
        }

        if (supplyClaimedAlready > _condition.maxClaimableSupply) {
            revert("max supply claimed");
        }

        ClaimCondition memory updatedCondition = ClaimCondition({
            startTimestamp: _condition.startTimestamp,
            maxClaimableSupply: _condition.maxClaimableSupply,
            supplyClaimed: supplyClaimedAlready,
            quantityLimitPerWallet: _condition.quantityLimitPerWallet,
            merkleRoot: _condition.merkleRoot,
            pricePerToken: _condition.pricePerToken,
            currency: _condition.currency,
            metadata: _condition.metadata
        });

        claimCondition[_tokenId] = updatedCondition;
        conditionId[_tokenId] = targetConditionId;

        emit ClaimConditionUpdated(_tokenId, _condition, _resetClaimEligibility);
    }

    /// @dev Checks a request to claim NFTs against the active claim condition's criteria.
    function verifyClaim(
        uint256 _tokenId,
        address _claimer,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof
    ) public view returns (bool isOverride) {
        ClaimCondition memory currentClaimPhase = claimCondition[_tokenId];
        uint256 claimLimit = currentClaimPhase.quantityLimitPerWallet;
        uint256 claimPrice = currentClaimPhase.pricePerToken;
        address claimCurrency = currentClaimPhase.currency;

        if (currentClaimPhase.merkleRoot != bytes32(0)) {
            (isOverride, ) = MerkleProof.verify(
                _allowlistProof.proof,
                currentClaimPhase.merkleRoot,
                keccak256(
                    abi.encodePacked(
                        _claimer,
                        _allowlistProof.quantityLimitPerWallet,
                        _allowlistProof.pricePerToken,
                        _allowlistProof.currency
                    )
                )
            );
        }

        if (isOverride) {
            claimLimit = _allowlistProof.quantityLimitPerWallet != 0
                ? _allowlistProof.quantityLimitPerWallet
                : claimLimit;
            claimPrice = _allowlistProof.pricePerToken != type(uint256).max
                ? _allowlistProof.pricePerToken
                : claimPrice;
            claimCurrency = _allowlistProof.pricePerToken != type(uint256).max && _allowlistProof.currency != address(0)
                ? _allowlistProof.currency
                : claimCurrency;
        }

        uint256 _supplyClaimedByWallet = supplyClaimedByWallet[conditionId[_tokenId]][_claimer];

        if (_currency != claimCurrency || _pricePerToken != claimPrice) {
            revert("!PriceOrCurrency");
        }

        if (_quantity == 0 || (_quantity + _supplyClaimedByWallet > claimLimit)) {
            revert("!Qty");
        }

        if (currentClaimPhase.supplyClaimed + _quantity > currentClaimPhase.maxClaimableSupply) {
            revert("!MaxSupply");
        }

        if (currentClaimPhase.startTimestamp > block.timestamp) {
            revert("cant claim yet");
        }
    }

    /// @dev Returns the supply claimed by claimer for active conditionId.
    function getSupplyClaimedByWallet(uint256 _tokenId, address _claimer) public view returns (uint256) {
        return supplyClaimedByWallet[conditionId[_tokenId]][_claimer];
    }

    /*////////////////////////////////////////////////////////////////////
        Optional hooks that can be implemented in the derived contract
    ///////////////////////////////////////////////////////////////////*/

    /// @dev Exposes the ability to override the msg sender.
    function _dropMsgSender() internal virtual returns (address) {
        return msg.sender;
    }

    /// @dev Runs before every `claim` function call.
    function _beforeClaim(
        uint256 _tokenId,
        address _receiver,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof,
        bytes memory _data
    ) internal virtual {}

    /// @dev Runs after every `claim` function call.
    function _afterClaim(
        uint256 _tokenId,
        address _receiver,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof,
        bytes memory _data
    ) internal virtual {}

    /// @dev Collects and distributes the primary sale value of NFTs being claimed.
    function _collectPriceOnClaim(
        address _primarySaleRecipient,
        uint256 _quantityToClaim,
        address _currency,
        uint256 _pricePerToken
    ) internal virtual;

    /// @dev Transfers the NFTs being claimed.
    function _transferTokensOnClaim(
        address _to,
        uint256 _tokenId,
        uint256 _quantityBeingClaimed
    ) internal virtual;

    function _canSetClaimConditions() internal view virtual returns (bool);
}

// File: src/extension/LazyMint.sol



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

/// @author thirdweb

import "./interface/ILazyMint.sol";
import "./BatchMintMetadata.sol";

/**
 *  The `LazyMint` is a contract extension for any base NFT contract. It lets you 'lazy mint' any number of NFTs
 *  at once. Here, 'lazy mint' means defining the metadata for particular tokenIds of your NFT contract, without actually
 *  minting a non-zero balance of NFTs of those tokenIds.
 */

abstract contract LazyMint is ILazyMint, BatchMintMetadata {
    /// @notice The tokenId assigned to the next new NFT to be lazy minted.
    uint256 internal nextTokenIdToLazyMint;

    /**
     *  @notice                  Lets an authorized address lazy mint a given amount of NFTs.
     *
     *  @param _amount           The number of NFTs to lazy mint.
     *  @param _baseURIForTokens The base URI for the 'n' number of NFTs being lazy minted, where the metadata for each
     *                           of those NFTs is `${baseURIForTokens}/${tokenId}`.
     *  @param _data             Additional bytes data to be used at the discretion of the consumer of the contract.
     *  @return batchId          A unique integer identifier for the batch of NFTs lazy minted together.
     */
    function lazyMint(
        uint256 _amount,
        string calldata _baseURIForTokens,
        bytes calldata _data
    ) public virtual override returns (uint256 batchId) {
        if (!_canLazyMint()) {
            revert("Not authorized");
        }

        if (_amount == 0) {
            revert("0 amt");
        }

        uint256 startId = nextTokenIdToLazyMint;

        (nextTokenIdToLazyMint, batchId) = _batchMintMetadata(startId, _amount, _baseURIForTokens);

        emit TokensLazyMinted(startId, startId + _amount - 1, _baseURIForTokens, _data);

        return batchId;
    }

    /// @dev Returns whether lazy minting can be performed in the given execution context.
    function _canLazyMint() internal view virtual returns (bool);
}

// File: src/extension/Multicall.sol



// 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;
    }
}

// File: src/extension/OperatorFilterToggle.sol



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

/// @author thirdweb

import "./interface/IOperatorFilterToggle.sol";

abstract contract OperatorFilterToggle is IOperatorFilterToggle {
    bool public operatorRestriction;

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

    function _setOperatorRestriction(bool _restriction) internal {
        operatorRestriction = _restriction;
        emit OperatorRestriction(_restriction);
    }

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

// File: src/extension/OperatorFilterer.sol



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

/// @author thirdweb

import "./interface/IOperatorFilterRegistry.sol";
import "./OperatorFilterToggle.sol";

/**
 * @title  OperatorFilterer
 * @notice Abstract contract whose constructor automatically registers and optionally subscribes to or copies another
 *         registrant's entries in the OperatorFilterRegistry.
 * @dev    This smart contract is meant to be inherited by token contracts so they can use the following:
 *         - `onlyAllowedOperator` modifier for `transferFrom` and `safeTransferFrom` methods.
 *         - `onlyAllowedOperatorApproval` modifier for `approve` and `setApprovalForAll` methods.
 */

abstract contract OperatorFilterer is OperatorFilterToggle {
    error OperatorNotAllowed(address operator);

    IOperatorFilterRegistry public constant OPERATOR_FILTER_REGISTRY =
        IOperatorFilterRegistry(0x000000000000AAeB6D7670E522A718067333cd4E);

    constructor(address subscriptionOrRegistrantToCopy, bool subscribe) {
        // 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 (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));
                }
            }
        }
    }

    modifier onlyAllowedOperator(address from) virtual {
        // Allow spending tokens from addresses with balance
        // Note that this still allows listings and marketplaces with escrow to transfer tokens if transferred
        // from an EOA.
        if (from != msg.sender) {
            _checkFilterOperator(msg.sender);
        }
        _;
    }

    modifier onlyAllowedOperatorApproval(address operator) virtual {
        _checkFilterOperator(operator);
        _;
    }

    function _checkFilterOperator(address operator) internal view virtual {
        // Check registry code length to facilitate testing in environments without a deployed registry.
        if (operatorRestriction) {
            if (address(OPERATOR_FILTER_REGISTRY).code.length > 0) {
                if (!OPERATOR_FILTER_REGISTRY.isOperatorAllowed(address(this), operator)) {
                    revert OperatorNotAllowed(operator);
                }
            }
        }
    }
}

// File: src/extension/Ownable.sol



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

/// @author thirdweb

import "./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.
 */

abstract contract Ownable is IOwnable {
    /// @dev Owner of the contract (purpose: OpenSea compatibility)
    address private _owner;

    /// @dev Reverts if caller is not the owner.
    modifier onlyOwner() {
        if (msg.sender != _owner) {
            revert("Not authorized");
        }
        _;
    }

    /**
     *  @notice Returns the owner of the contract.
     */
    function owner() public view override returns (address) {
        return _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 {
        address _prevOwner = _owner;
        _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);
}

// File: src/extension/PrimarySale.sol



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

/// @author thirdweb

import "./interface/IPrimarySale.sol";

/**
 *  @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 The address that receives all primary sales value.
    address private recipient;

    /// @dev Returns primary sale recipient address.
    function primarySaleRecipient() public view override returns (address) {
        return 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 {
        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);
}

// File: src/extension/Royalty.sol



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

/// @author thirdweb

import "./interface/IRoyalty.sol";

/**
 *  @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 {
    /// @dev The (default) address that receives all royalty value.
    address private royaltyRecipient;

    /// @dev The (default) % of a sale to take as royalty (in basis points).
    uint16 private royaltyBps;

    /// @dev Token ID => royalty recipient and bps for token
    mapping(uint256 => RoyaltyInfo) private royaltyInfoForToken;

    /**
     *  @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) {
        RoyaltyInfo memory royaltyForToken = royaltyInfoForToken[_tokenId];

        return
            royaltyForToken.recipient == address(0)
                ? (royaltyRecipient, uint16(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) {
        return (royaltyRecipient, uint16(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");
        }

        royaltyRecipient = _royaltyRecipient;
        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");
        }

        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);
}

// File: src/extension/interface/IClaimCondition.sol



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

/// @author thirdweb

/**
 *  The interface `IClaimCondition` is written for thirdweb's 'Drop' contracts, which are distribution mechanisms for tokens.
 *
 *  A claim condition defines criteria under which accounts can mint tokens. Claim conditions can be overwritten
 *  or added to by the contract admin. At any moment, there is only one active claim condition.
 */

interface IClaimCondition {
    /**
     *  @notice The criteria that make up a claim condition.
     *
     *  @param startTimestamp                 The unix timestamp after which the claim condition applies.
     *                                        The same claim condition applies until the `startTimestamp`
     *                                        of the next claim condition.
     *
     *  @param maxClaimableSupply             The maximum total number of tokens that can be claimed under
     *                                        the claim condition.
     *
     *  @param supplyClaimed                  At any given point, the number of tokens that have been claimed
     *                                        under the claim condition.
     *
     *  @param quantityLimitPerWallet         The maximum number of tokens that can be claimed by a wallet.
     *
     *  @param merkleRoot                     The allowlist of addresses that can claim tokens under the claim
     *                                        condition.
     *
     *  @param pricePerToken                  The price required to pay per token claimed.
     *
     *  @param currency                       The currency in which the `pricePerToken` must be paid.
     *
     *  @param metadata                       Claim condition metadata.
     */
    struct ClaimCondition {
        uint256 startTimestamp;
        uint256 maxClaimableSupply;
        uint256 supplyClaimed;
        uint256 quantityLimitPerWallet;
        bytes32 merkleRoot;
        uint256 pricePerToken;
        address currency;
        string metadata;
    }
}

// File: src/extension/interface/IContractMetadata.sol



// 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);
}

// File: src/extension/interface/IDelayedReveal.sol



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

/// @author thirdweb

/**
 *  Thirdweb's `DelayedReveal` is a contract extension for base NFT contracts. It lets you create batches of
 *  'delayed-reveal' NFTs. You can learn more about the usage of delayed reveal NFTs here - https://blog.thirdweb.com/delayed-reveal-nfts
 */

interface IDelayedReveal {
    /// @dev Emitted when tokens are revealed.
    event TokenURIRevealed(uint256 indexed index, string revealedURI);

    /**
     *  @notice Reveals a batch of delayed reveal NFTs.
     *
     *  @param identifier The ID for the batch of delayed-reveal NFTs to reveal.
     *
     *  @param key        The key with which the base URI for the relevant batch of NFTs was encrypted.
     */
    function reveal(uint256 identifier, bytes calldata key) external returns (string memory revealedURI);

    /**
     *  @notice Performs XOR encryption/decryption.
     *
     *  @param data The data to encrypt. In the case of delayed-reveal NFTs, this is the "revealed" state
     *              base URI of the relevant batch of NFTs.
     *
     *  @param key  The key with which to encrypt data
     */
    function encryptDecrypt(bytes memory data, bytes calldata key) external pure returns (bytes memory result);
}

// File: src/extension/interface/IDropSinglePhase1155.sol



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

/// @author thirdweb

import "./IClaimCondition.sol";

/**
 *  The interface `IDropSinglePhase1155` is written for thirdweb's 'DropSinglePhase' contracts, which are distribution mechanisms for tokens.
 *
 *  An authorized wallet can set a claim condition for the distribution of the contract's tokens.
 *  A claim condition defines criteria under which accounts can mint tokens. Claim conditions can be overwritten
 *  or added to by the contract admin. At any moment, there is only one active claim condition.
 */

interface IDropSinglePhase1155 is IClaimCondition {
    /**
     *  @param proof Prood of concerned wallet's inclusion in an allowlist.
     *  @param quantityLimitPerWallet The total quantity of tokens the allowlisted wallet is eligible to claim over time.
     *  @param pricePerToken The price per token the allowlisted wallet must pay to claim tokens.
     *  @param currency The currency in which the allowlisted wallet must pay the price for claiming tokens.
     */
    struct AllowlistProof {
        bytes32[] proof;
        uint256 quantityLimitPerWallet;
        uint256 pricePerToken;
        address currency;
    }

    /// @notice Emitted when tokens are claimed via `claim`.
    event TokensClaimed(
        address indexed claimer,
        address indexed receiver,
        uint256 indexed tokenId,
        uint256 quantityClaimed
    );

    /// @notice Emitted when the contract's claim conditions are updated.
    event ClaimConditionUpdated(uint256 indexed tokenId, ClaimCondition condition, bool resetEligibility);

    /**
     *  @notice Lets an account claim a given quantity of NFTs.
     *
     *  @param receiver                       The receiver of the NFT to claim.
     *  @param tokenId                        The tokenId of the NFT to claim.
     *  @param quantity                       The quantity of the NFT to claim.
     *  @param currency                       The currency in which to pay for the claim.
     *  @param pricePerToken                  The price per token to pay for the claim.
     *  @param allowlistProof                 The proof of the claimer's inclusion in the merkle root allowlist
     *                                        of the claim conditions that apply.
     *  @param data                           Arbitrary bytes data that can be leveraged in the implementation of this interface.
     */
    function claim(
        address receiver,
        uint256 tokenId,
        uint256 quantity,
        address currency,
        uint256 pricePerToken,
        AllowlistProof calldata allowlistProof,
        bytes memory data
    ) external payable;

    /**
     *  @notice Lets a contract admin (account with `DEFAULT_ADMIN_ROLE`) set claim conditions.
     *
     *  @param phase                    Claim condition to set.
     *
     *  @param resetClaimEligibility    Whether to honor the restrictions applied to wallets who have claimed tokens in the current conditions,
     *                                  in the new claim conditions being set.
     *
     *  @param tokenId                  The tokenId for which to set the relevant claim condition.
     */
    function setClaimConditions(
        uint256 tokenId,
        ClaimCondition calldata phase,
        bool resetClaimEligibility
    ) external;
}

// File: src/extension/interface/ILazyMint.sol



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

/// @author thirdweb

/**
 *  Thirdweb's `LazyMint` is a contract extension for any base NFT contract. It lets you 'lazy mint' any number of NFTs
 *  at once. Here, 'lazy mint' means defining the metadata for particular tokenIds of your NFT contract, without actually
 *  minting a non-zero balance of NFTs of those tokenIds.
 */

interface ILazyMint {
    /// @dev Emitted when tokens are lazy minted.
    event TokensLazyMinted(uint256 indexed startTokenId, uint256 endTokenId, string baseURI, bytes encryptedBaseURI);

    /**
     *  @notice Lazy mints a given amount of NFTs.
     *
     *  @param amount           The number of NFTs to lazy mint.
     *
     *  @param baseURIForTokens The base URI for the 'n' number of NFTs being lazy minted, where the metadata for each
     *                          of those NFTs is `${baseURIForTokens}/${tokenId}`.
     *
     *  @param extraData        Additional bytes data to be used at the discretion of the consumer of the contract.
     *
     *  @return batchId         A unique integer identifier for the batch of NFTs lazy minted together.
     */
    function lazyMint(
        uint256 amount,
        string calldata baseURIForTokens,
        bytes calldata extraData
    ) external returns (uint256 batchId);
}

// File: src/extension/interface/IMulticall.sol



// 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);
}

// File: src/extension/interface/IOperatorFilterRegistry.sol



// 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);
}

// File: src/extension/interface/IOperatorFilterToggle.sol



// 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;
}

// File: src/extension/interface/IOwnable.sol



// 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);
}

// File: src/extension/interface/IPrimarySale.sol



// 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);
}

// File: src/extension/interface/IRoyalty.sol



// 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);
}

// File: src/interfaces/IWETH.sol



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

interface IWETH {
    function deposit() external payable;

    function withdraw(uint256 amount) external;

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

// File: src/lib/CurrencyTransferLib.sol



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

/// @author thirdweb

// Helper interfaces
import { IWETH } from "../interfaces/IWETH.sol";

import "../openzeppelin-presets/token/ERC20/utils/SafeERC20.sol";

library CurrencyTransferLib {
    using SafeERC20 for IERC20;

    /// @dev The address interpreted as native token of the chain.
    address public constant NATIVE_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    /// @dev Transfers a given amount of currency.
    function transferCurrency(
        address _currency,
        address _from,
        address _to,
        uint256 _amount
    ) internal {
        if (_amount == 0) {
            return;
        }

        if (_currency == NATIVE_TOKEN) {
            safeTransferNativeToken(_to, _amount);
        } else {
            safeTransferERC20(_currency, _from, _to, _amount);
        }
    }

    /// @dev Transfers a given amount of currency. (With native token wrapping)
    function transferCurrencyWithWrapper(
        address _currency,
        address _from,
        address _to,
        uint256 _amount,
        address _nativeTokenWrapper
    ) internal {
        if (_amount == 0) {
            return;
        }

        if (_currency == NATIVE_TOKEN) {
            if (_from == address(this)) {
                // withdraw from weth then transfer withdrawn native token to recipient
                IWETH(_nativeTokenWrapper).withdraw(_amount);
                safeTransferNativeTokenWithWrapper(_to, _amount, _nativeTokenWrapper);
            } else if (_to == address(this)) {
                // store native currency in weth
                require(_amount == msg.value, "msg.value != amount");
                IWETH(_nativeTokenWrapper).deposit{ value: _amount }();
            } else {
                safeTransferNativeTokenWithWrapper(_to, _amount, _nativeTokenWrapper);
            }
        } else {
            safeTransferERC20(_currency, _from, _to, _amount);
        }
    }

    /// @dev Transfer `amount` of ERC20 token from `from` to `to`.
    function safeTransferERC20(
        address _currency,
        address _from,
        address _to,
        uint256 _amount
    ) internal {
        if (_from == _to) {
            return;
        }

        if (_from == address(this)) {
            IERC20(_currency).safeTransfer(_to, _amount);
        } else {
            IERC20(_currency).safeTransferFrom(_from, _to, _amount);
        }
    }

    /// @dev Transfers `amount` of native token to `to`.
    function safeTransferNativeToken(address to, uint256 value) internal {
        // solhint-disable avoid-low-level-calls
        // slither-disable-next-line low-level-calls
        (bool success, ) = to.call{ value: value }("");
        require(success, "native token transfer failed");
    }

    /// @dev Transfers `amount` of native token to `to`. (With native token wrapping)
    function safeTransferNativeTokenWithWrapper(
        address to,
        uint256 value,
        address _nativeTokenWrapper
    ) internal {
        // solhint-disable avoid-low-level-calls
        // slither-disable-next-line low-level-calls
        (bool success, ) = to.call{ value: value }("");
        if (!success) {
            IWETH(_nativeTokenWrapper).deposit{ value: value }();
            IERC20(_nativeTokenWrapper).safeTransfer(to, value);
        }
    }
}

// File: src/lib/MerkleProof.sol



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

/// @author thirdweb

/**
 * @dev These functions deal with verification of Merkle Trees proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 *
 * Source: https://github.com/ensdomains/governance/blob/master/contracts/MerkleProof.sol
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool, uint256) {
        bytes32 computedHash = leaf;
        uint256 index = 0;

        for (uint256 i = 0; i < proof.length; i++) {
            index *= 2;
            bytes32 proofElement = proof[i];

            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
                index += 1;
            }
        }

        // Check if the computed hash (root) is equal to the provided root
        return (computedHash == root, index);
    }
}

// File: src/lib/TWAddress.sol



// 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);
            }
        }
    }
}

// File: src/lib/TWStrings.sol



// 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);
    }
}

// File: src/openzeppelin-presets/token/ERC20/utils/SafeERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../../../../eip/interface/IERC20.sol";
import "../../../../lib/TWAddress.sol";

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

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

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

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

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