// File: contracts/pool/lpNft/LpNft.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

import { ILpNft } from "../../interface/ILpNft.sol";
import { IMetadataGenerator } from "../../interface/IMetadataGenerator.sol";
import { MetadataGeneratorError } from "../metadata/MetadataGeneratorError.sol";
import { IDittoPool } from "../../interface/IDittoPool.sol";
import { IDittoPoolFactory } from "../../interface/IDittoPoolFactory.sol";
import { OwnerTwoStep } from "../../utils/OwnerTwoStep.sol";

import { IERC721 } from "../../../lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol";
import { ERC721 } from "../../../lib/solmate/src/tokens/ERC721.sol";

/**
 * @title LpNft
 * @notice LpNft is an ERC721 NFT collection that tokenizes market makers' liquidity positions in the Ditto protocol.
 */
contract LpNft is ILpNft, ERC721, OwnerTwoStep {
    IDittoPoolFactory internal _dittoPoolFactory;

    ///@dev stores which pool each lpId corresponds to
    mapping(uint256 => IDittoPool) internal _lpIdToPool;

    /// @dev dittoPool address is the key of the mapping, underlying NFT address traded by that pool is the value
    mapping(address => IERC721) internal _approvedDittoPoolToNft;

    IMetadataGenerator internal _metadataGenerator;

    ///@dev NFTs are minted sequentially, starting at tokenId 1
    uint96 internal _nextId = 1;

    // ***************************************************************
    // * ========================= EVENTS ========================== *
    // ***************************************************************

    event LpNftAdminUpdatedMetadataGenerator(address metadataGenerator);
    event LpNftAdminUpdatedDittoPoolFactory(address dittoPoolFactory);

    // ***************************************************************
    // * ========================= ERRORS ========================== *
    // ***************************************************************
    error LpNftDittoFactoryOnly();
    error LpNftDittoPoolOnly();

    // ***************************************************************
    // * ==================== ADMIN FUNCTIONS ====================== *
    // ***************************************************************

    /**
     * @notice Constructor. Records the DittoPoolFactory address. Sets the owner of this contract. 
     *   Assigns the metadataGenerator address.
     */
    constructor(
        address initialOwner_,
        address metadataGenerator_
    ) ERC721("Ditto V1 LP Positions", "DITTO-V1-POS") {
        _transferOwnership(initialOwner_);
        _metadataGenerator = IMetadataGenerator(metadataGenerator_);
    }

    ///@inheritdoc ILpNft
    function setDittoPoolFactory(IDittoPoolFactory dittoPoolFactory_) external onlyOwner {
        _dittoPoolFactory = dittoPoolFactory_;
        emit LpNftAdminUpdatedDittoPoolFactory(address(dittoPoolFactory_));
    }

    ///@inheritdoc ILpNft
    function setMetadataGenerator(IMetadataGenerator metadataGenerator_) external onlyOwner {
        _metadataGenerator = metadataGenerator_;

        emit LpNftAdminUpdatedMetadataGenerator(address(metadataGenerator_));
    }

    ///@inheritdoc ILpNft
    function setApprovedDittoPool(address dittoPool_, IERC721 nft_) external onlyDittoPoolFactory {
        _approvedDittoPoolToNft[dittoPool_] = nft_;
    }

    // ***************************************************************
    // * =============== PROTECTED POOL FUNCTIONS ================== *
    // ***************************************************************

    ///@inheritdoc ILpNft
    function mint(address to_) public onlyApprovedDittoPools returns (uint256 lpId) {
        lpId = _nextId;

        _lpIdToPool[lpId] = IDittoPool(msg.sender);

        _safeMint(to_, lpId);
        unchecked {
            ++_nextId;
        }
    }

    ///@inheritdoc ILpNft
    function burn(uint256 lpId_) external onlyApprovedDittoPools {
        delete _lpIdToPool[lpId_];

        _burn(lpId_);
    }

    ///@inheritdoc ILpNft
    function emitMetadataUpdate(uint256 lpId_) external onlyApprovedDittoPools {
        emit MetadataUpdate(lpId_);
    }

    ///@inheritdoc ILpNft
    function emitMetadataUpdateForAll() external onlyApprovedDittoPools {
        if (totalSupply > 0) {
            emit BatchMetadataUpdate(1, totalSupply);
        }
    }

    // ***************************************************************
    // * ==================== AUTH MODIFIERS ======================= *
    // ***************************************************************
    /**
     * @notice Modifier that restricts access to the DittoPoolFactory contract 
     *   that created this NFT collection.
     */
    modifier onlyDittoPoolFactory() {
        if (msg.sender != address(_dittoPoolFactory)) {
            revert LpNftDittoFactoryOnly();
        }
        _;
    }

    /**
     * @notice Modifier that restricts access to DittoPool contracts that have been 
     *   approved to mint and burn liquidity position NFTs by the DittoPoolFactory.
     */
    modifier onlyApprovedDittoPools() {
        if (address(_approvedDittoPoolToNft[msg.sender]) == address(0)) {
            revert LpNftDittoPoolOnly();
        }
        _;
    }

    // ***************************************************************
    // * ====================== VIEW FUNCTIONS ===================== *
    // ***************************************************************

    ///@inheritdoc ILpNft
    function isApproved(address spender_, uint256 lpId_) external view returns (bool) {
        address ownerOf = ownerOf[lpId_];
        return (
            spender_ == ownerOf || isApprovedForAll[ownerOf][spender_]
                || spender_ == getApproved[lpId_]
        );
    }

    ///@inheritdoc ILpNft
    function isApprovedDittoPool(address pool_) external view returns (bool) {
        return address(_approvedDittoPoolToNft[pool_]) != address(0);
    }

    ///@inheritdoc ILpNft
    function getPoolForLpId(uint256 lpId_) external view returns (IDittoPool) {
        return _lpIdToPool[lpId_];
    }

    ///@inheritdoc ILpNft
    function getPoolAndOwnerForLpId(uint256 lpId_)
        external
        view
        returns (IDittoPool pool, address owner)
    {
        pool = _lpIdToPool[lpId_];
        owner = ownerOf[lpId_];
    }

    ///@inheritdoc ILpNft
    function getNftForLpId(uint256 lpId_) external view returns (IERC721) {
        return _approvedDittoPoolToNft[address(_lpIdToPool[lpId_])];
    }

    ///@inheritdoc ILpNft
    function getLpValueToken(uint256 lpId_) public view returns (uint256) {
        return _lpIdToPool[lpId_].getTokenBalanceForLpId(lpId_);
    }

    ///@inheritdoc ILpNft
    function getAllHeldNftIds(uint256 lpId_) external view returns (uint256[] memory) {
        return _lpIdToPool[lpId_].getNftIdsForLpId(lpId_);
    }

    ///@inheritdoc ILpNft
    function getNumNftsHeld(uint256 lpId_) public view returns (uint256) {
        return _lpIdToPool[lpId_].getNftCountForLpId(lpId_);
    }

    ///@inheritdoc ILpNft
    function getLpValueNft(uint256 lpId_) public view returns (uint256) {
        return getNumNftsHeld(lpId_) * _lpIdToPool[lpId_].basePrice();
    }

    ///@inheritdoc ILpNft
    function getLpValue(uint256 lpId_) external view returns (uint256) {
        return getLpValueToken(lpId_) + getLpValueNft(lpId_);
    }

    ///@inheritdoc ILpNft
    function dittoPoolFactory() external view returns (IDittoPoolFactory) {
        return _dittoPoolFactory;
    }

    ///@inheritdoc ILpNft
    function nextId() external view returns (uint256) {
        return _nextId;
    }

    ///@inheritdoc ILpNft
    function metadataGenerator() external view returns (IMetadataGenerator) {
        return _metadataGenerator;
    }

    // ***************************************************************
    // * ================== ERC721 INTERFACE ======================= *
    // ***************************************************************

    /**
     *  @notice returns storefront-level metadata to be viewed on marketplaces.
     */
    function contractURI() external view returns (string memory) {
        return _metadataGenerator.payloadContractUri();
    }

    /**
     * @notice returns the metadata for a given token, to be viewed on marketplaces and off-chain
     * @dev see [EIP-721](https://eips.ethereum.org/EIPS/eip-721) EIP-721 Metadata Extension
     * @param lpId_ the tokenId of the NFT to get metadata for
     */
    function tokenURI(uint256 lpId_) public view override returns (string memory) {
        IDittoPool pool = IDittoPool(_lpIdToPool[lpId_]);
        uint256 tokenCount = getLpValueToken(lpId_);
        uint256 nftCount = getNumNftsHeld(lpId_);
        try _metadataGenerator.payloadTokenUri(lpId_, pool, tokenCount, nftCount) returns (string memory tokenUri) {
            return tokenUri;
        } catch (bytes memory reason) {
            return MetadataGeneratorError.errorTokenUri(lpId_, address(pool), tokenCount, nftCount, reason);
        }
    }

    /**
     * @notice Whether or not this contract supports the given interface. 
     *   See [EIP-165](https://eips.ethereum.org/EIPS/eip-165)
     */
    function supportsInterface(bytes4 interfaceId) public pure override returns (bool) {
        return interfaceId == 0x01ffc9a7 // ERC165 Interface ID for ERC165
            || interfaceId == 0x80ac58cd // ERC165 Interface ID for ERC721
            || interfaceId == 0x49064906 // ERC165 Interface ID for ERC4906
            || interfaceId == 0x5b5e139f; // ERC165 Interface ID for ERC721Metadata
    }
}

// File: contracts/interface/ILpNft.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

import { IERC4906 } from "./IERC4906.sol";
import { IDittoPool } from "./IDittoPool.sol";
import { IDittoPoolFactory } from "./IDittoPoolFactory.sol";
import { IMetadataGenerator } from "./IMetadataGenerator.sol";
import { IERC721 } from "../../lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol";

interface ILpNft is IERC4906 {
    // * =============== State Changing Functions ================== *

    /**
     * @notice Allows an administrator to change the DittoPoolFactory contract that interacts with this LP NFT.
     * @param dittoPoolFactory_ The address of a Ditto Pool Factory contract.
     */
    function setDittoPoolFactory(IDittoPoolFactory dittoPoolFactory_) external;

    /**
     * @notice Allows an admin to update the metadata generator through the pool factory.
     * @dev only the Ditto Pool Factory is allowed to call this function
     * @param metadataGenerator_ The address of the metadata generator contract.
     */
    function setMetadataGenerator(IMetadataGenerator metadataGenerator_) external;

    /**
     * @notice Allows the factory to whitelist DittoPool contracts as allowed to mint and burn liquidity position NFTs.
     * @dev only the Ditto Pool Factory is allowed to call this function
     * @param dittoPool_ The address of the DittoPool contract to whitelist.
     * @param nft_ The address of the NFT contract that the DittoPool trades.
     */
    function setApprovedDittoPool(address dittoPool_, IERC721 nft_) external;

    /**
     * @notice mint function used to create new LP Position NFTs 
     * @dev only callable by approved DittoPool contracts
     * @param to_ The address of the user who will own the new NFT.
     * @return lpId The tokenId of the newly minted NFT.
     */
    function mint(address to_) external returns (uint256 lpId);

    /**
     * @notice burn function used to destroy LP Position NFTs
     * @dev only callable approved DittoPool contracts
     * @param lpId_ The tokenId of the NFT to burn.
     */
    function burn(uint256 lpId_) external;

    /**
     * @notice Updates LP position NFT metadata on trades, as LP's LP information changes due to the trade
     * @dev see [EIP-4906](https://eips.ethereum.org/EIPS/eip-4906) EIP-721 Metadata Update Extension
     * @dev only callable by approved DittoPool contracts
     * @param lpId_ the tokenId of the NFT who's metadata needs to be updated
     */
    function emitMetadataUpdate(uint256 lpId_) external;

    /**
     * @notice Tells off-chain actors to update LP position NFT metadata for all tokens in the collection
     * @dev see [EIP-4906](https://eips.ethereum.org/EIPS/eip-4906) EIP-721 Metadata Update Extension
     * @dev only callable by approved DittoPool contracts
     */
    function emitMetadataUpdateForAll() external;

    // * ======= EXTERNALLY CALLABLE READ-ONLY VIEW FUNCTIONS ====== *

    /**
     * @notice Tells you whether a given tokenId is allowed to be spent/used by a given spender on behalf of its owner.
     * @dev see EIP-721 approve() and setApprovalForAll() functions
     * @param spender_ The address of the operator/spender to check.
     * @param lpId_ The tokenId of the NFT to check.
     * @return approved Whether the spender is allowed to send or manipulate the NFT.
     */
    function isApproved(address spender_, uint256 lpId_) external view returns (bool);

    /**
     * @notice Check if an address has been approved as a DittoPool on the LpNft contract
     * @param dittoPool_ The address of the DittoPool contract to check.
     * @return approved Whether the DittoPool is approved to mint and burn liquidity position NFTs.
     */
    function isApprovedDittoPool(address dittoPool_) external view returns (bool);

    /**
     * @notice Returns which DittoPool applies to a given LP Position NFT tokenId.
     * @param lpId_ The LP Position tokenId to get info for.
     * @return pool The DittoPool contract that the LP Position NFT is tied to.
     */
    function getPoolForLpId(uint256 lpId_) external view returns (IDittoPool pool);

    /**
     * @notice Returns the DittoPool and liquidity provider's address for a given LP Position NFT tokenId.
     * @param lpId_ The LP Position tokenId to get info for.
     * @return pool The DittoPool contract that the LP Position NFT is tied to.
     * @return owner The owner of the lpId.
     */
    function getPoolAndOwnerForLpId(uint256 lpId_)
        external
        view
        returns (IDittoPool pool, address owner);

    /**
     * @notice Returns the address of the underlying NFT collection traded by the DittoPool corresponding to an LP Position NFT tokenId.
     * @param lpId_ The LP Position tokenId to get info for.
     * @return nft The address of the underlying NFT collection for that LP position
     */
    function getNftForLpId(uint256 lpId_) external view returns (IERC721);

    /**
     * @notice Returns the amount of ERC20 tokens held by a liquidity provider in a given LP Position.
     * @param lpId_ The LP Position tokenId to get info for.
     * @return value the amount of ERC20 tokens held by the liquidity provider in the given LP Position.
     */
    function getLpValueToken(uint256 lpId_) external view returns (uint256);

    /**
     * @notice Returns the list of NFT Ids (of the underlying NFT collection) held by a liquidity provider in a given LP Position.
     * @param lpId_ The LP Position tokenId to get info for.
     * @return nftIds the list of NFT Ids held by the liquidity provider in the given LP Position.
     */
    function getAllHeldNftIds(uint256 lpId_) external view returns (uint256[] memory);

    /**
     * @notice Returns the count of NFTs held by a liquidity provider in a given LP Position.
     * @param lpId_ The LP Position tokenId to get info for.
     * @return nftCount the count of NFTs held by the liquidity provider in the given LP Position.
     */
    function getNumNftsHeld(uint256 lpId_) external view returns (uint256);

    /**
     * @notice Returns the "value" of an LP positions NFT holdings in ERC20 Tokens,
     *   if it were to be sold at the current base price.
     * @param lpId_ The LP Position tokenId to get info for.
     * @return value the "value" of an LP positions NFT holdings in ERC20 Tokens.
     */
    function getLpValueNft(uint256 lpId_) external view returns (uint256);

    /**
     * @notice Returns the "value" of an LP positions total holdings in ERC20s + NFTs,
     *   if all the Nfts in the holdings were sold at the current base price.
     * @param lpId_ The LP Position tokenId to get info for.
     * @return value the "value" of an LP positions sum total holdings in ERC20s + NFTs.
     */
    function getLpValue(uint256 lpId_) external view returns (uint256);

    /**
     * @notice Returns the address of the DittoPoolFactory contract
     * @return factory the address of the DittoPoolFactory contract
     */
    function dittoPoolFactory() external view returns (IDittoPoolFactory);

    /**
     * @notice returns the next tokenId to be minted
     * @dev NFTs are minted sequentially, starting at tokenId 1
     * @return nextId the next tokenId to be minted
     */
    function nextId() external view returns (uint256);

    /**
     * @notice returns the address of the contract that generates the metadata for LP Position NFTs
     * @return metadataGenerator the address of the contract that generates the metadata for LP Position NFTs
     */
    function metadataGenerator() external view returns (IMetadataGenerator);
}

// File: contracts/interface/IMetadataGenerator.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

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

/**
 * @title IMetadataGenerator
 * @notice Provides a standard interface for interacting with the MetadataGenerator contract 
 *   to return a base64 encoded tokenURI for a given tokenId.
 */
interface IMetadataGenerator {
    /**
     * @notice Called in the tokenURI() function of the LpNft contract.
     * @param lpId_ The identifier for a liquidity position NFT
     * @param pool_ The DittoPool address associated with this liquidity position NFT
     * @param countToken_ Count of all ERC20 tokens assigned to the owner of the liquidity position NFT in the DittoPool
     * @param countNft_ Count of all NFTs assigned to the owner of the liquidity position NFT in the DittoPool
     * @return tokenUri A distinct Uniform Resource Identifier (URI) for a given asset.
     */
    function payloadTokenUri(
        uint256 lpId_,
        IDittoPool pool_,
        uint256 countToken_,
        uint256 countNft_
    ) external view returns (string memory tokenUri);

    /**
     * @notice Called in the contractURI() function of the LpNft contract.
     * @return contractUri A distinct Uniform Resource Identifier (URI) for a given asset.
     */
    function payloadContractUri() external view returns (string memory contractUri);
}

// File: contracts/pool/metadata/MetadataGeneratorError.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

import {Base64} from "./library/Base64.sol";
import {Strings} from "../../../lib/openzeppelin-contracts/contracts/utils/Strings.sol";

library MetadataGeneratorError {
    string internal constant SVG_PREFIX = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
        "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 768 768\">"
        "<style>.t{font:bold 13px monospace}</style>"
        "<rect width=\"768\" height=\"768\" style=\"fill:#e5e5e5;stroke:#000;stroke-width:1.5px;\"/>"
        "<text class=\"t\" x=\"1\" y=\"300\">Unable to make LP NFT Image. Funds are unaffected by this error.</text>";
    string internal constant SVG_POSTFIX = "</svg>";

    ///@notice A human readable description of the item.
    string internal constant DESCRIPTION =
        "Ditto is a gas-efficient, DeFi-optimized automated market maker (AMM) that enables efficient and seamless trading between NFTs and ERC-20 tokens. "
        "Users can effortlessly create on-chain pools for trading NFTs, allowing for more composable NFT liquidity provision. "
        "Ditto streamlines the process of exchanging digital assets in the ever-growing NFT market and makes them more compatible with the growing vertical at the intersection of DeFi and NFTs.";

    function uint8ToHexChar(uint8 raw) internal pure returns (uint8) {
        return (raw > 9)
            ? (raw + (0x61 - 0xa)) // ascii lowercase a
            : (raw + 0x30); // ascii 0
    }

    function bytesToHexString(bytes memory buffer) internal pure returns (string memory) {
        bytes memory hexBuffer = new bytes(buffer.length * 2);
        for (uint256 i = 0; i < buffer.length; i++) {
            uint8 raw = uint8(buffer[i]);
            uint8 highNibble = raw >> 4;
            uint8 lowNibble = raw & 0x0f;
            hexBuffer[i * 2] = bytes1(uint8ToHexChar(highNibble));
            hexBuffer[i * 2 + 1] = bytes1(uint8ToHexChar(lowNibble));
        }
        return string(abi.encodePacked("0x", hexBuffer));
    }

    function generateLpIdString(uint256 lpId_) internal pure returns (string memory) {
        return string.concat("<text class=\"t\" x=\"1\" y=\"350\">LpId: ", Strings.toString(lpId_), "</text>");
    }

    function generatePoolString(address pool_) internal pure returns (string memory) {
        return
            string.concat("<text class=\"t\" x=\"1\" y=\"375\">Pool: ", Strings.toHexString(uint160(pool_)), "</text>");
    }

    function generateTokenCount(uint256 tokenCount_) internal pure returns (string memory) {
        return
            string.concat("<text class=\"t\" x=\"1\" y=\"400\">Token Count: ", Strings.toString(tokenCount_), "</text>");
    }

    function generateNftCount(uint256 nftCount_) internal pure returns (string memory) {
        return string.concat("<text class=\"t\" x=\"1\" y=\"425\">NFT Count: ", Strings.toString(nftCount_), "</text>");
    }

    function generateErrorComment(bytes memory reasonCode_) internal pure returns (string memory) {
        return string.concat("<!-- Error Reason Code: ", bytesToHexString(reasonCode_), "-->");
    }

    function _generateImage(
        uint256 lpId_,
        address pool_,
        uint256 tokenCount_,
        uint256 nftCount_,
        bytes memory reasonCode_
    ) internal pure returns (string memory) {
        return string.concat(
            SVG_PREFIX,
            generateLpIdString(lpId_),
            generatePoolString(pool_),
            generateTokenCount(tokenCount_),
            generateNftCount(nftCount_),
            generateErrorComment(reasonCode_),
            SVG_POSTFIX
        );
    }

    function errorTokenUri(
        uint256 lpId_,
        address pool_,
        uint256 tokenCount_,
        uint256 nftCount_,
        bytes memory reasonCode_
    ) internal pure returns (string memory) {
        string memory image = Base64.encode(bytes(_generateImage(lpId_, pool_, tokenCount_, nftCount_, reasonCode_)));
        return string(
            abi.encodePacked(
                "data:application/json;base64,",
                Base64.encode(
                    bytes(
                        abi.encodePacked(
                            '{"name":"',
                            string(abi.encodePacked("Ditto V1 LP Position #", Strings.toString(lpId_))),
                            '", "description":"',
                            DESCRIPTION,
                            '", "image": "',
                            "data:image/svg+xml;base64,",
                            image,
                            '"}'
                        )
                    )
                )
            )
        );
    }
}

// File: contracts/interface/IDittoPool.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

import { Fee } from "../struct/Fee.sol";
import { SwapNftsForTokensArgs, SwapTokensForNftsArgs } from "../struct/SwapArgs.sol";
import { LpNft } from "../pool/lpNft/LpNft.sol";
import { PoolTemplate } from "../struct/FactoryTemplates.sol";
import { LpIdToTokenBalance } from "../struct/LpIdToTokenBalance.sol";
import { NftCostData } from "../struct/NftCostData.sol";
import { IPermitter } from "../interface/IPermitter.sol";

import { IERC721 } from "../../lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol";
import { CurveErrorCode } from "../utils/CurveErrorCode.sol";

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

interface IDittoPool is IOwnerTwoStep {
    // ***************************************************************
    // * =============== ADMINISTRATIVE FUNCTIONS ================== *
    // ***************************************************************

    /**
     * @notice For use in tokenURI function metadata
     * @return curve type of curve
     */
    function bondingCurve() external pure returns (string memory curve);

    /**
     * @notice Used by the Contract Factory to set the initial state & parameters of the pool.
     * @dev Necessarily separate from constructor due to [ERC-1167](https://eips.ethereum.org/EIPS/eip-1167) factory clone paradigm.
     * @param params_ A struct that contains various initialization parameters for the pool. See `PoolTemplate.sol` for details.
     * @param template_ which address was used to clone business logic for this pool.
     * @param lpNft_ The Liquidity Provider Positions NFT contract that tokenizes liquidity provisions in the protocol
     * @param permitter_ Contract to authorize which tokenIds from the underlying nft collection are allowed to be traded in this pool.
     * @dev Set permitter to address(0) to allow any tokenIds from the underlying NFT collection.
     */
    function initPool(
        PoolTemplate calldata params_,
        address template_,
        LpNft lpNft_,
        IPermitter permitter_
    ) external;

    /**
     * @notice Admin function to change the base price charged to buy an NFT from the pair. Each bonding curve uses this differently.
     * @param newBasePrice_ The updated base price
     */
    function changeBasePrice(uint128 newBasePrice_) external;

    /**
     * @notice Admin function to change the delta parameter associated with the bonding curve. Each bonding curve uses this differently. 
     * @param newDelta_ The updated delta
     */
    function changeDelta(uint128 newDelta_) external;

    /**
     * @notice Admin function to change the pool lp fee, set by owner, paid to LPers only when they are the counterparty in a trade
     * @param newFeeLp_ New fee, in wei / 1e18, charged by the pool for trades with it (i.e. 1% = 0.01e18)
     */
    function changeLpFee(uint96 newFeeLp_) external;

    /**
     * @notice Change the pool admin fee, set by owner, paid to an address of the owner's choosing
     * @param newFeeAdmin_ New fee, in wei / 1e18, charged by the pool for trades with it (i.e. 1% = 0.01e18)
     */
    function changeAdminFee(uint96 newFeeAdmin_) external;

    /**
     * @notice Change who the pool admin fee for this pool is sent to.
     * @param newAdminFeeRecipient_ New address to send admin fees to
     */
    function changeAdminFeeRecipient(address newAdminFeeRecipient_) external;

    // ***************************************************************
    // * ================== LIQUIDITY FUNCTIONS ==================== *
    // ***************************************************************
    /**
     * @notice Function for liquidity providers to create new Liquidity Positions within the pool by depositing liquidity.
     * @dev Provides the liquidity provider with a new liquidity position tracking NFT every time. 
     * @dev This function assumes that msg.sender is the owner of the NFTs and Tokens.
     * @dev This function expects that this contract has permission to move NFTs and tokens to itself from the owner.
     * @dev The **lpRecipient_** parameter to this function is intended to allow creating positions on behalf of
     * another party. msg.sender can send nfts and tokens to the pool and then have the pool create the liquidity position
     * for someone who is not msg.sender. The `DittoPoolFactory` uses this feature to create a new DittoPool and deposit
     * liquidity into it in one step. NFTs flow from user -> factory -> pool and then lpRecipient_ is set to the user.
     * @dev `lpRecipient_` can steal liquidity deposited by msg.sender if lpRecipient_ is not set to msg.sender.
     * @param lpRecipient_ The address that will receive the LP position ownership NFT.
     * @param nftIdList_ The list of NFT tokenIds msg.sender wishes to deposit into the pool.
     * @param tokenDepositAmount_ The amount of ERC20 tokens msg.sender wishes to deposit into the pool.
     * @param permitterData_ Data to check that the NFT Token IDs are permitted to deposited into this pool if a permitter is set.
     * @return lpId The tokenId of the LP position NFT that was minted as a result of this liquidity deposit.
     */
    function createLiquidity(
        address lpRecipient_,
        uint256[] calldata nftIdList_,
        uint256 tokenDepositAmount_,
        bytes calldata permitterData_,
        bytes calldata referrer_
    ) external returns (uint256 lpId);

    /**
     * @notice Function for market makers / liquidity providers to deposit NFTs and ERC20s into existing LP Positions.
     * @dev Anybody may add liquidity to existing LP Positions, regardless of whether they own the position or not.
     * @dev This function expects that this contract has permission to move NFTs and tokens to itself from the msg.sender.
     * @param lpId_ TokenId of existing LP position to add liquidity to. Does not have to be owned by msg.sender!
     * @param nftIdList_ The list of NFT tokenIds msg.sender wishes to deposit into the pool.
     * @param tokenDepositAmount_ The amount of ERC20 tokens msg.sender wishes to deposit into the pool.
     * @param permitterData_ Data to check that the NFT Token IDs are permitted to deposited into this pool if a permitter is set.
     */
    function addLiquidity(
        uint256 lpId_,
        uint256[] calldata nftIdList_,
        uint256 tokenDepositAmount_,
        bytes calldata permitterData_,
        bytes calldata referrer_
    ) external;

    /**
     * @notice Function for liquidity providers to withdraw NFTs and ERC20 tokens from their LP positions.
     * @dev Can be called to change an existing liquidity position, or remove an LP position by withdrawing all liquidity.
     * @dev May be called by an authorized party (approved on the LP NFT) to withdraw liquidity on behalf of the LP Position owner.
     * @param withdrawalAddress_ the address that will receive the ERC20 tokens and NFTs withdrawn from the pool.
     * @param lpId_ LP Position TokenID that liquidity is being removed from. Does not have to be owned by msg.sender if the msg.sender is authorized.
     * @param nftIdList_ The list of NFT tokenIds msg.sender wishes to withdraw from the pool.
     * @param tokenWithdrawAmount_ The amount of ERC20 tokens the msg.sender wishes to withdraw from the pool.
     */
    function pullLiquidity(
        address withdrawalAddress_,
        uint256 lpId_,
        uint256[] calldata nftIdList_,
        uint256 tokenWithdrawAmount_
    ) external;

    // ***************************************************************
    // * =================== TRADE FUNCTIONS ======================= *
    // ***************************************************************

    /**
     * @notice Trade ERC20s for a specific list of NFT token ids.
     * @dev To compute the amount of token to send, call bondingCurve.getBuyInfo
     * This swap is meant for users who want specific IDs. 
     * 
     * @param args_ The arguments for the swap. See SwapArgs.sol for parameters
     * @return inputAmount The actual amount of tokens spent to purchase the NFTs.
     */
    function swapTokensForNfts(
        SwapTokensForNftsArgs calldata args_
    ) external returns (uint256 inputAmount);

    /**
     * @notice Trade a list of allowed nft ids for ERC20s.
     * @dev To compute the amount of token to that will be received, call bondingCurve.getSellInfo.
     * @dev Key difference with sudoswap here:
     * In sudoswap, each market maker has a separate smart contract with their liquidity.
     * To sell to a market maker, you just check if their specific `LSSVMPair` contract has enough money.
     * In DittoSwap, we share different market makers' liquidity in the same pool contract.
     * So this function has an additional parameter `lpIds` forcing the buyer to check
     * off-chain which market maker's LP position that they want to trade with, for each specific NFT
     * that they are selling into the pool. The lpIds array should correspond with the nftIds
     * array in the same order & indexes. e.g. to sell NFT with tokenId 1337 to the market maker who's
     * LP position has id 42, the buyer would call this function with
     * nftIds = [1337] and lpIds = [42].
     *
     * @param args_ The arguments for the swap. See SwapArgs.sol for parameters
     * @return outputAmount The amount of token received
     */
    function swapNftsForTokens(
        SwapNftsForTokensArgs calldata args_
    ) external returns (uint256 outputAmount);

    /**
     * @notice Read-only function used to query the bonding curve for buy pricing info.
     * @param numNfts The number of NFTs to buy out of the pair
     * @param swapData_ Extra data to pass to the curve
     * @return error any errors that would be throw if trying to buy that many NFTs
     * @return newBasePrice the new base price after the trade
     * @return newDelta the new delta after the trade
     * @return inputAmount the amount of token to send to the pool to purchase that many NFTs
     * @return nftCostData the cost data for each NFT purchased
     */
    function getBuyNftQuote(uint256 numNfts, bytes calldata swapData_)
        external
        view
        returns (
            CurveErrorCode error,
            uint256 newBasePrice,
            uint256 newDelta,
            uint256 inputAmount,
            NftCostData[] memory nftCostData
        );

    /**
     * @notice Read-only function used to query the bonding curve for sell pricing info
     * @param numNfts The number of NFTs to sell into the pair
     * @param swapData_ Extra data to pass to the curve
     * @return error any errors that would be throw if trying to sell that many NFTs
     * @return newBasePrice the new base price after the trade
     * @return newDelta the new delta after the trade
     * @return outputAmount the amount of tokens the pool will send out for selling that many NFTs
     * @return nftCostData the cost data for each NFT sold
     */
    function getSellNftQuote(uint256 numNfts, bytes calldata swapData_)
        external
        view
        returns (
            CurveErrorCode error,
            uint256 newBasePrice,
            uint256 newDelta,
            uint256 outputAmount,
            NftCostData[] memory nftCostData
        );

    // ***************************************************************
    // * ===================== VIEW FUNCTIONS ====================== *
    // ***************************************************************

    /**
     * @notice returns the status of whether this contract has been initialized
     * @dev see [ERC-1167](https://eips.ethereum.org/EIPS/eip-1167) factory clone paradigm
     * and also `DittoPoolFactory.sol`
     *
     * @return initialized whether the contract has been initialized
     */
    function initialized() external view returns (bool);

    /**
     * @notice returns which DittoPool Template this pool was created with.
     * @dev see [ERC-1167](https://eips.ethereum.org/EIPS/eip-1167) factory clone paradigm
     * @return template the address of the DittoPool template used to create this pool.
     */
    function template() external view returns (address);

    /**
     * @notice Function to determine if a given DittoPool can support muliple LP providers or not.
     * @return isPrivatePool_ boolean value indicating if the pool is private or not
     */
    function isPrivatePool() external view returns (bool isPrivatePool_);

    /**
     * @notice Returns the cumulative fee associated with trading with this pool as a 1e18 based percentage.
     * @return fee_ the total fee(s) associated with this pool, for display purposes.
     */
    function fee() external view returns (uint256 fee_);

    /**
     * @notice Returns the protocol fee associated with trading with this pool as a 1e18 based percentage.
     * @return feeProtocol_ the protocol fee associated with trading with this pool
     */
    function protocolFee() external view returns (uint256 feeProtocol_);

    /**
     * @notice Returns the admin fee given to the pool admin as a 1e18 based percentage.
     * @return adminFee_ the fee associated with trading with any pair of this pool
     */
    function adminFee() external view returns (uint96 adminFee_);

    /**
     * @notice Returns the fee given to liquidity providers for trading with this pool.
     * @return lpFee_ the fee associated with trading with a particular pair of this pool.
     */
    function lpFee() external view returns (uint96 lpFee_);

    /**
     * @notice Returns the delta parameter for the bonding curve associated this pool
     * Each bonding curve uses delta differently, but in general it is used as an input
     *   to determine the next price on the bonding curve.
     * @return delta_ The delta parameter for the bonding curve of this pool
     */
    function delta() external view returns (uint128 delta_);

    /**
     * @notice Returns the base price to sell the next NFT into this pool, base+delta to buy
     * Each bonding curve uses base price differently, but in general it is used as the current price of the pool.
     * @return basePrice_ this pool's current base price
     */
    function basePrice() external view returns (uint128 basePrice_);

    /**
     * @notice Returns the factory that created this pool.
     * @return dittoPoolFactory the ditto pool factory for the contract
     */
    function dittoPoolFactory() external view returns (address);

    /**
     * @notice Returns the address that recieves admin fees from trades with this pool
     * @return adminFeeRecipient The admin fee recipient of this pool
     */
    function adminFeeRecipient() external view returns (address);

    /**
     * @notice Returns the NFT collection that represents liquidity positions in this pool
     * @return lpNft The LP Position NFT collection for this pool
     */
    function getLpNft() external view returns (address);

    /**
     * @notice Returns the nft collection that this pool trades 
     * @return nft_ the address of the underlying nft collection contract
     */
    function nft() external view returns (IERC721 nft_);

    /**
     * @notice Returns the address of the ERC20 token that this pool is trading NFTs against.
     * @return token_ The address of the ERC20 token that this pool is trading NFTs against.
     */
    function token() external view returns (address token_);

    /**
     * @notice Returns the permitter contract that allows or denies specific NFT tokenIds to be traded in this pool
     * @dev if this address is zero, then all NFTs from the underlying collection are allowed to be traded in this pool
     * @return permitter the address of this pool's permitter contract, or zero if no permitter is set
     */
    function permitter() external view returns (IPermitter);

    /**
     * @notice Returns how many ERC20 tokens a liquidity provider has in the pool
     * @dev this function mimics mappings: an invalid lpId_ will return 0 rather than throwing for being invalid
     * @param lpId_ LP Position NFT token ID to query for
     * @return lpTokenBalance the amount of ERC20 tokens the liquidity provider has in the pool
     */
    function getTokenBalanceForLpId(uint256 lpId_) external view returns (uint256);

    /**
     * @notice Returns the full list of NFT tokenIds that are owned by a specific liquidity provider in this pool
     * @dev This function is not gas efficient and not-meant to be used on chain, only as a convenience for off-chain.
     * @dev worst-case is O(n) over the length of all the NFTs owned by the pool
     * @param lpId_ an LP position NFT token Id for a user providing liquidity to this pool
     * @return nftIds the list of NFT tokenIds in this pool that are owned by the specific liquidity provider
     */
    function getNftIdsForLpId(uint256 lpId_) external view returns (uint256[] memory nftIds);

    /**
     * @notice returns the number of NFTs owned by a specific liquidity provider in this pool
     * @param lpId_ a user providing liquidity to this pool for trading with
     * @return userNftCount the number of NFTs in this pool owned by the liquidity provider
     */
    function getNftCountForLpId(uint256 lpId_) external view returns (uint256);

    /**
     * @notice returns the number of NFTs and number of ERC20s owned by a specific liquidity provider in this pool
     * pretty much equivalent to the user's liquidity position in non-nft form.
     * @dev this function mimics mappings: an invalid lpId_ will return (0,0) rather than throwing for being invalid
     * @param lpId_ a user providing liquidity to this pool for trading with
     * @return tokenBalance the amount of ERC20 tokens the liquidity provider has in the pool
     * @return nftBalance the number of NFTs in this pool owned by the liquidity provider
     */
    function getTotalBalanceForLpId(uint256 lpId_)
        external
        view
        returns (uint256 tokenBalance, uint256 nftBalance);

    /**
     * @notice returns the Lp Position NFT token Id that owns a specific NFT token Id in this pool
     * @dev this function mimics mappings: an invalid NFT token Id will return 0 rather than throwing for being invalid
     * @param nftId_ an NFT token Id that is owned by a liquidity provider in this pool
     * @return lpId the Lp Position NFT token Id that owns the NFT token Id
     */
    function getLpIdForNftId(uint256 nftId_) external view returns (uint256);

    /**
     * @notice returns the full list of all NFT tokenIds that are owned by this pool
     * @dev does not have to match what the underlying NFT contract balanceOf(dittoPool)
     * thinks is owned by this pool: this is only valid liquidity tradeable in this pool
     * NFTs can be lost by unsafe transferring them to a dittoPool
     * also this function is O(n) gas efficient, only really meant to be used off-chain
     * @return nftIds the list of all NFT Token Ids in this pool, across all liquidity positions
     */
    function getAllPoolHeldNftIds() external view returns (uint256[] memory);

    /**
     * @dev Returns the number of NFTs owned by the pool
     * @return nftBalance_ The number of NFTs owned by the pool
     */
    function getPoolTotalNftBalance() external view returns (uint256);

    /**
     * @notice returns the full list of all LP Position NFT tokenIds that represent liquidity in this pool
     * @return lpIds the list of all LP Position NFT Token Ids corresponding to liquidity in this pool
     */
    function getAllPoolLpIds() external view returns (uint256[] memory);

    /**
     * @notice returns the full amount of all ERC20 tokens that the pool thinks it owns
     * @dev may not match the underlying ERC20 contract balanceOf() because of unsafe transfers
     * this is only accounting for valid liquidity tradeable in the pool
     * @dev this function is not gas efficient and almost certainly should never actually be used on chain
     * @return totalPoolTokenBalance the amount of ERC20 tokens the pool thinks it owns
     */
    function getPoolTotalTokenBalance() external view returns (uint256);

    /**
     * @notice returns the enumerated list of all token balances for all LP positions in this pool
     * @dev this function is not gas efficient and almost certainly should never actually be used on chain
     * @return balances the list of all LP Position NFT Token Ids and the amount of ERC20 tokens they are apportioned in the pool
     */
    function getAllLpIdTokenBalances()
        external
        view
        returns (LpIdToTokenBalance[] memory balances);

    /**
     * @notice function called on SafeTransferFrom of NFTs to this contract
     * @dev see [ERC-721](https://eips.ethereum.org/EIPS/eip-721) for details
     */
    function onERC721Received(address, address, uint256, bytes memory) external returns (bytes4);
}

// File: contracts/interface/IDittoPoolFactory.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

import { PoolTemplate } from "../struct/FactoryTemplates.sol";
import { LpNft } from "../pool/lpNft/LpNft.sol";
import { IOwnerTwoStep } from "./IOwnerTwoStep.sol";
import { IDittoPool } from "./IDittoPool.sol";
import { IDittoRouter } from "./IDittoRouter.sol";
import { IPermitter } from "./IPermitter.sol";
import { IMetadataGenerator } from "./IMetadataGenerator.sol";
import { IPoolManager } from "./IPoolManager.sol";
import { PoolManagerTemplate, PermitterTemplate } from "../struct/FactoryTemplates.sol";

interface IDittoPoolFactory is IOwnerTwoStep {
    // ***************************************************************
    // * ====================== MAIN INTERFACE ===================== *
    // ***************************************************************

    /**
     * @notice Create a ditto pool along with a permitter and pool manager if requested. 
     *
     * @param params_ The pool creation parameters including initial liquidity and fee settings
     *   **uint256 templateIndex** The index of the pool template to clone
     *   **address token** ERC20 token address trading against the nft collection
     *   **address nft** the address of the NFT collection that we are creating a pool for
     *   **uint96 feeLp** the fee percentage paid to LPers when they are the counterparty in a trade
     *   **address owner** The liquidity initial provider and owner of the pool, overwritten by pool manager if present
     *   **uint96 feeAdmin** the fee percentage paid to the pool admin 
     *   **uint128 delta** the delta of the pool, see bonding curve documentation
     *   **uint128 basePrice** the base price of the pool, see bonding curve documentation
     *   **uint256[] nftIdList** the token IDs of NFTs to deposit into the pool as it is created. Empty arrays are allowed
     *   **uint256 initialTokenBalance** the number of ERC20 tokens to transfer to the pool as you create it. Zero is allowed
     *   **bytes initialTemplateData** initial data to pass to the pool contract in its initializer
     * @param poolManagerTemplate_ The template for the pool manager to manage the pool. Provide type(uint256).max to opt out
     * @param permitterTemplate_  The template for the permitter to manage the pool. Provide type(uint256).max to opt out
     * @return dittoPool The newly created DittoPool
     * @return lpId The ID of the LP position NFT representing the initial liquidity deposited, or zero, if none deposited
     * @return poolManager The pool manager or the zero address if none was created
     * @return permitter The permitter or the zero address if none was created
     */
    function createDittoPool(
        PoolTemplate memory params_,
        PoolManagerTemplate calldata poolManagerTemplate_,
        PermitterTemplate calldata permitterTemplate_
    )
        external
        returns (IDittoPool dittoPool, uint256 lpId, IPoolManager poolManager, IPermitter permitter);

    // ***************************************************************
    // * ============== EXTERNAL VIEW FUNCTIONS ==================== *
    // ***************************************************************

    /**
     * @notice Get the list of pool templates that can be used to create new pools
     * @return poolTemplates_ The list of pool templates that can be used to create new pools
     */
    function poolTemplates() external view returns (address[] memory);

    /**
     * @notice Get the list of pool manager templates that can be used to manage a new pool
     * @return poolManagerTemplates_ The list of pool manager templates that can be used to manage a new pool
     */
    function poolManagerTemplates() external view returns (IPoolManager[] memory);

    /**
     * @notice Get the list of permitter templates that can be used to restrict nft ids in a pool
     * @return permitterTemplates_ The list of permitter templates that can be used to restrict nft ids in a pool
     */
    function permitterTemplates() external view returns (IPermitter[] memory);

    /**
     * @notice Check if an address is an approved whitelisted router that can trade with the pools
     * @param potentialRouter_ The address to check if it is a whitelisted router
     * @return isWhitelistedRouter True if the address is a whitelisted router
     */
    function isWhitelistedRouter(address potentialRouter_) external view returns (bool);

    /**
     * @notice Get the protocol fee recipient address
     * @return poolFeeRecipient of the protocol fee recipient
     */
    function protocolFeeRecipient() external view returns (address);

    /**
     * @notice Get the protocol fee multiplier used to calculate fees on all trades 
     * @return protocolFeeMultiplier the multiplier for global protocol fees on all trades
     */
    function getProtocolFee() external view returns (uint96);

    /**
     * @notice The nft used to represent liquidity positions
     */
    function lpNft() external view returns (LpNft lpNft_);

    // ***************************************************************
    // * ==================== ADMIN FUNCTIONS ====================== *
    // ***************************************************************

    /**
     * @notice Admin function to add additional pool templates 
     * @param poolTemplates_ addresses of the new pool templates
     */
    function addPoolTemplates(address[] calldata poolTemplates_) external;

    /**
     * @notice Admin function to add additional pool manager templates
     * @param poolManagerTemplates_ addresses of the new pool manager templates
     */
    function addPoolManagerTemplates(IPoolManager[] calldata poolManagerTemplates_) external;

    /**
     * @notice Admin function to add additional permitter templates
     * @param permitterTemplates_ addresses of the new permitter templates
     */
    function addPermitterTemplates(IPermitter[] calldata permitterTemplates_) external;

    /**
     * @notice Admin function to add additional whitelisted routers
     * @param routers_ addresses of the new routers to whitelist
     */
    function addRouters(IDittoRouter[] calldata routers_) external;

    /**
     * @notice Admin function to set the protocol fee recipient
     * @param feeProtocolRecipient_ address of the new protocol fee recipient
     */
    function setProtocolFeeRecipient(address feeProtocolRecipient_) external;

    /**
     * @notice Admin function to set the protocol fee multiplier used to calculate fees on all trades, base 1e18
     * @param feeProtocol_ the new protocol fee multiplier
     */
    function setProtocolFee(uint96 feeProtocol_) external;

    /**
     * @notice Admin function to change the LP position NFT collection used by this Ditto Pool Factory
     * @param lpNft_ address of the new LpNft
     */
    function setLpNft(LpNft lpNft_) external;
}

// File: contracts/utils/OwnerTwoStep.sol



// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.0;

import { IOwnerTwoStep } from "../interface/IOwnerTwoStep.sol";

abstract contract OwnerTwoStep is IOwnerTwoStep {

    /// @dev The owner of the contract
    address private _owner;

    /// @dev The pending owner of the contract
    address private _pendingOwner;

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(msg.sender);
    }

    // ***************************************************************
    // * ========================= EVENTS ========================== *
    // ***************************************************************

    event OwnerTwoStepOwnerStartedTransfer(address currentOwner, address newPendingOwner);
    event OwnerTwoStepPendingOwnerAcceptedTransfer(address newOwner);
    event OwnerTwoStepOwnershipTransferred(address previousOwner, address newOwner);
    event OwnerTwoStepOwnerRenouncedOwnership(address previousOwner);

    // ***************************************************************
    // * ========================= ERRORS ========================== *
    // ***************************************************************

    error OwnerTwoStepNotOwner();
    error OwnerTwoStepNotPendingOwner();

    // ***************************************************************
    // * =================== USER INTERFACE ======================== *
    // ***************************************************************

    ///@inheritdoc IOwnerTwoStep
    function transferOwnership(address newPendingOwner_) public virtual override onlyOwner {
        _pendingOwner = newPendingOwner_;

        emit OwnerTwoStepOwnerStartedTransfer(_owner, newPendingOwner_);
    }

    ///@inheritdoc IOwnerTwoStep
    function acceptOwnership() public virtual override onlyPendingOwner {
        emit OwnerTwoStepPendingOwnerAcceptedTransfer(msg.sender);

        _transferOwnership(msg.sender);
    }

    ///@inheritdoc IOwnerTwoStep
    function renounceOwnership() public virtual onlyOwner {

        emit OwnerTwoStepOwnerRenouncedOwnership(msg.sender);

        _transferOwnership(address(0));
    }

    // ***************************************************************
    // * =================== VIEW FUNCTIONS ======================== *
    // ***************************************************************

    ///@inheritdoc IOwnerTwoStep
    function owner() public view virtual override returns (address) {
        return _owner;
    }

    ///@inheritdoc IOwnerTwoStep
    function pendingOwner() external view override returns (address) {
        return _pendingOwner;
    }

    // ***************************************************************
    // * ===================== MODIFIERS =========================== *
    // ***************************************************************

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

    /**
     * @dev Throws if called by any account other than the pending owner.
     */
    modifier onlyPendingOwner {
        if (msg.sender != _pendingOwner) {
            revert OwnerTwoStepNotPendingOwner();
        }
        _;
    }

    // ***************************************************************
    // * ================== INTERNAL HELPERS ======================= *
    // ***************************************************************

    /**
     * @dev Throws if called by any account other than the owner. Saves contract size over copying 
     *   implementation into every function that uses the modifier.
     */
    function _onlyOwner() internal view virtual {
        if (msg.sender != _owner) {
            revert OwnerTwoStepNotOwner();
        }
    }


    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * @param newOwner_ New owner to transfer to
     */
    function _transferOwnership(address newOwner_) internal {
        delete _pendingOwner;

        emit OwnerTwoStepOwnershipTransferred(_owner, newOwner_);

        _owner = newOwner_;
    }
}

// File: lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol



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

pragma solidity ^0.8.19;

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

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

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

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

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

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

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

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

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

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

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

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

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

// File: lib/solmate/src/tokens/ERC721.sol



// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern, minimalist, and gas efficient ERC-721 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC721.sol)
/// @dev Note that balanceOf does not revert if passed the zero address, in defiance of the ERC.
abstract contract ERC721 {
    /*///////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

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

    event Approval(address indexed owner, address indexed spender, uint256 indexed id);

    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /*///////////////////////////////////////////////////////////////
                          METADATA STORAGE/LOGIC
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    function tokenURI(uint256 id) public view virtual returns (string memory);

    /*///////////////////////////////////////////////////////////////
                            ERC721 STORAGE                        
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

    mapping(uint256 => address) public ownerOf;

    mapping(uint256 => address) public getApproved;

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

    /*///////////////////////////////////////////////////////////////
                              CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

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

    /*///////////////////////////////////////////////////////////////
                              ERC721 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 id) public virtual {
        address owner = ownerOf[id];

        require(msg.sender == owner || isApprovedForAll[owner][msg.sender], "NOT_AUTHORIZED");

        getApproved[id] = spender;

        emit Approval(owner, spender, id);
    }

    function setApprovalForAll(address operator, bool approved) public virtual {
        isApprovedForAll[msg.sender][operator] = approved;

        emit ApprovalForAll(msg.sender, operator, approved);
    }

    function transferFrom(
        address from,
        address to,
        uint256 id
    ) public virtual {
        require(from == ownerOf[id], "WRONG_FROM");

        require(to != address(0), "INVALID_RECIPIENT");

        require(
            msg.sender == from || msg.sender == getApproved[id] || isApprovedForAll[from][msg.sender],
            "NOT_AUTHORIZED"
        );

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        unchecked {
            balanceOf[from]--;

            balanceOf[to]++;
        }

        delete getApproved[id];

        ownerOf[id] = to;

        emit Transfer(from, to, id);
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id
    ) public virtual {
        transferFrom(from, to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, "") ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        bytes memory data
    ) public virtual {
        transferFrom(from, to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, data) ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }

    /*///////////////////////////////////////////////////////////////
                              ERC165 LOGIC
    //////////////////////////////////////////////////////////////*/

    function supportsInterface(bytes4 interfaceId) public pure virtual returns (bool) {
        return
            interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
            interfaceId == 0x80ac58cd || // ERC165 Interface ID for ERC721
            interfaceId == 0x5b5e139f; // ERC165 Interface ID for ERC721Metadata
    }

    /*///////////////////////////////////////////////////////////////
                       INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 id) internal virtual {
        require(to != address(0), "INVALID_RECIPIENT");

        require(ownerOf[id] == address(0), "ALREADY_MINTED");

        // Counter overflow is incredibly unrealistic.
        unchecked {
            totalSupply++;

            balanceOf[to]++;
        }

        ownerOf[id] = to;

        emit Transfer(address(0), to, id);
    }

    function _burn(uint256 id) internal virtual {
        address owner = ownerOf[id];

        require(ownerOf[id] != address(0), "NOT_MINTED");

        // Ownership check above ensures no underflow.
        unchecked {
            totalSupply--;

            balanceOf[owner]--;
        }

        delete ownerOf[id];

        emit Transfer(owner, address(0), id);
    }

    /*///////////////////////////////////////////////////////////////
                       INTERNAL SAFE MINT LOGIC
    //////////////////////////////////////////////////////////////*/

    function _safeMint(address to, uint256 id) internal virtual {
        _mint(to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, "") ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }

    function _safeMint(
        address to,
        uint256 id,
        bytes memory data
    ) internal virtual {
        _mint(to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, data) ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }
}

/// @notice A generic interface for a contract which properly accepts ERC721 tokens.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC721.sol)
interface ERC721TokenReceiver {
    function onERC721Received(
        address operator,
        address from,
        uint256 id,
        bytes calldata data
    ) external returns (bytes4);
}

// File: contracts/interface/IERC4906.sol



// SPDX-License-Identifier: CC0-1.0
pragma solidity 0.8.19;

/**
 * @title IERC4906
 * @notice Copied from https://github.com/ethereum/EIPs/blob/master/EIPS/eip-4906.md
 */
interface IERC4906 {
    /// @dev This event emits when the metadata of a token is changed.
    /// So that the third-party platforms such as NFT market could
    /// timely update the images and related attributes of the NFT.
    event MetadataUpdate(uint256 _tokenId);

    /// @dev This event emits when the metadata of a range of tokens is changed.
    /// So that the third-party platforms such as NFT market could
    /// timely update the images and related attributes of the NFTs.
    event BatchMetadataUpdate(uint256 _fromTokenId, uint256 _toTokenId);
}

// File: contracts/pool/metadata/library/Base64.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.6.0;

/// @title Base64
/// @author Brecht Devos - <brecht@loopring.org>
/// @notice Provides functions for encoding/decoding base64
library Base64 {
    string internal constant TABLE_ENCODE =
        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    bytes internal constant TABLE_DECODE =
        hex"0000000000000000000000000000000000000000000000000000000000000000"
        hex"00000000000000000000003e0000003f3435363738393a3b3c3d000000000000"
        hex"00000102030405060708090a0b0c0d0e0f101112131415161718190000000000"
        hex"001a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132330000000000";

    function encode(bytes memory data) internal pure returns (string memory) {
        if (data.length == 0) return "";

        // load the table into memory
        string memory table = TABLE_ENCODE;

        // multiply by 4/3 rounded up
        uint256 encodedLen = 4 * ((data.length + 2) / 3);

        // add some extra buffer at the end required for the writing
        string memory result = new string(encodedLen + 32);

        assembly {
            // set the actual output length
            mstore(result, encodedLen)

            // prepare the lookup table
            let tablePtr := add(table, 1)

            // input ptr
            let dataPtr := data
            let endPtr := add(dataPtr, mload(data))

            // result ptr, jump over length
            let resultPtr := add(result, 32)

            // run over the input, 3 bytes at a time
            for { } lt(dataPtr, endPtr) { } {
                // read 3 bytes
                dataPtr := add(dataPtr, 3)
                let input := mload(dataPtr)

                // write 4 characters
                mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))
                resultPtr := add(resultPtr, 1)
                mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))
                resultPtr := add(resultPtr, 1)
                mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F))))
                resultPtr := add(resultPtr, 1)
                mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))
                resultPtr := add(resultPtr, 1)
            }

            // padding with '='
            switch mod(mload(data), 3)
            case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) }
            case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) }
        }

        return result;
    }

    function decode(string memory _data) internal pure returns (bytes memory) {
        bytes memory data = bytes(_data);

        if (data.length == 0) return new bytes(0);
        require(data.length % 4 == 0, "invalid base64 decoder input");

        // load the table into memory
        bytes memory table = TABLE_DECODE;

        // every 4 characters represent 3 bytes
        uint256 decodedLen = (data.length / 4) * 3;

        // add some extra buffer at the end required for the writing
        bytes memory result = new bytes(decodedLen + 32);

        assembly {
            // padding with '='
            let lastBytes := mload(add(data, mload(data)))
            if eq(and(lastBytes, 0xFF), 0x3d) {
                decodedLen := sub(decodedLen, 1)
                if eq(and(lastBytes, 0xFFFF), 0x3d3d) { decodedLen := sub(decodedLen, 1) }
            }

            // set the actual output length
            mstore(result, decodedLen)

            // prepare the lookup table
            let tablePtr := add(table, 1)

            // input ptr
            let dataPtr := data
            let endPtr := add(dataPtr, mload(data))

            // result ptr, jump over length
            let resultPtr := add(result, 32)

            // run over the input, 4 characters at a time
            for { } lt(dataPtr, endPtr) { } {
                // read 4 characters
                dataPtr := add(dataPtr, 4)
                let input := mload(dataPtr)

                // write 3 bytes
                let output :=
                    add(
                        add(
                            shl(18, and(mload(add(tablePtr, and(shr(24, input), 0xFF))), 0xFF)),
                            shl(12, and(mload(add(tablePtr, and(shr(16, input), 0xFF))), 0xFF))
                        ),
                        add(
                            shl(6, and(mload(add(tablePtr, and(shr(8, input), 0xFF))), 0xFF)),
                            and(mload(add(tablePtr, and(input, 0xFF))), 0xFF)
                        )
                    )
                mstore(resultPtr, shl(232, output))
                resultPtr := add(resultPtr, 3)
            }
        }

        return result;
    }
}

// File: lib/openzeppelin-contracts/contracts/utils/Strings.sol



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

pragma solidity ^0.8.19;

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

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

    /**
     * @dev The `value` string doesn't fit in the specified `length`.
     */
    error StringsInsufficientHexLength(uint256 value, uint256 length);

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

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

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

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

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

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

// File: contracts/struct/Fee.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

/**
 * @title Fee
 * @notice Struct to hold the fee amounts for LP, admin and protocol. Is used in the protocol to 
 *   pass the fee percentages and the total fee amount depending on the context.
 */
struct Fee {
    uint256 lp;
    uint256 admin;
    uint256 protocol;
}

// File: contracts/struct/SwapArgs.sol



// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.19;

/**
 * @param nftIds The list of IDs of the NFTs to purchase
 * @param maxExpectedTokenInput The maximum acceptable cost from the sender (in wei or base units of ERC20).
 *   If the actual amount is greater than this value, the transaction will be reverted.
 * @param tokenSender ERC20 sender. Only used if msg.sender is an approved IDittoRouter, else msg.sender is used.
 * @param nftRecipient Address to send the purchased NFTs to.
 */
struct SwapTokensForNftsArgs {
    uint256[] nftIds;
    uint256 maxExpectedTokenInput;
    address tokenSender;
    address nftRecipient;
    bytes swapData;
}

/**
 * @param nftIds The list of IDs of the NFTs to sell to the pair
 * @param lpIds The list of IDs of the LP positions sell the NFTs to
 * @param minExpectedTokenOutput The minimum acceptable token count received by the sender. 
 *   If the actual amount is less than this value, the transaction will be reverted.
 * @param nftSender NFT sender. Only used if msg.sender is an approved IDittoRouter, else msg.sender is used.
 * @param tokenRecipient The recipient of the ERC20 proceeds.
 * @param permitterData Data to profe that the NFT Token IDs are permitted to be sold to this pool if a permitter is set.
 * @param swapData Extra data to pass to the curve
 */
struct SwapNftsForTokensArgs {
    uint256[] nftIds;
    uint256[] lpIds;
    uint256 minExpectedTokenOutput;
    address nftSender;
    address tokenRecipient;
    bytes permitterData;
    bytes swapData;
}


// File: contracts/struct/FactoryTemplates.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

/**
 * @notice A struct for creating a DittoSwap pool.
 */
struct PoolTemplate {
    bool isPrivatePool; // whether the pool is private or not
    uint256 templateIndex; // which DittoSwap template to use. Must be less than the number of available templates
    address token; // ERC20 token address
    address nft; // the address of the NFT collection that we are creating a pool for
    uint96 feeLp; // set by owner, paid to LPers only when they are the counterparty in a trade
    address owner; // owner creating the pool
    uint96 feeAdmin; // set by owner, paid to admin fee recipient
    uint128 delta; // the delta of the pool, see bonding curve documentation
    uint128 basePrice; // the base price of the pool, see bonding curve documentation
    uint256[] nftIdList; // the token IDs of NFTs to deposit into the pool
    uint256 initialTokenBalance; // the number of ERC20 tokens to transfer to the pool
    bytes templateInitData; // initial data to pass to the pool contract in its initializer
    bytes referrer; // the address of the referrer
}

/**
 * @notice A struct for containing Pool Manager template data.
 *  
 * @dev **templateIndex** Which DittoSwap template to use. If templateIndex is set to a value 
 *   larger than the number of templates, no pool manager is created
 * @dev **templateInitData** initial data to pass to the poolManager contract in its initializer.
 */
struct PoolManagerTemplate {
    uint256 templateIndex;
    bytes templateInitData;
}

/**
 * @notice A struct for containing Permitter template data.
 * @dev **templateIndex** Which DittoSwap template to use. If templateIndex is set to a value 
 *   larger than the number of templates, no permitter is created.
 * @dev **templateInitData** initial data to pass to the permitter contract in its initializer.
 * @dev **liquidityDepositPermissionData** Deposit data to pass in an all-in-one step to create a pool and deposit liquidity at the same time
 */
struct PermitterTemplate {
    uint256 templateIndex;
    bytes templateInitData;
    bytes liquidityDepositPermissionData;
}

// File: contracts/struct/LpIdToTokenBalance.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

/**
 * @notice Tuple struct to encapsulate a LP Position NFT token Id and the amount of ERC20 tokens it owns in the pool
 * @dev **lpId** the LP Position NFT token Id of a liquidity provider
 * @dev **tokenBalance** the amount of ERC20 tokens the liquidity provider has in the pool attributed to them
 */
struct LpIdToTokenBalance {
    uint256 lpId;
    uint256 tokenBalance;
}

// File: contracts/struct/NftCostData.sol



// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.19;

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

struct NftCostData {
    bool specificNftId;
    uint256 nftId;
    uint256 price;
    Fee fee;
}
// File: contracts/interface/IPermitter.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

/**
 * @title IPermitter
 * @notice Interface for the Permitter contracts. They are used to check whether a set of tokenIds
 *   are are allowed in a pool.
 */
interface IPermitter {
    /**
     * @notice Initializes the permitter contract with initial state.
     * @param data_ Any data necessary for initializing the permitter implementation.
     */
    function initialize(bytes memory data_) external returns (bytes memory);

    /**
     * @notice Returns whether or not the contract has been initialized.
     * @return initialized Whether or not the contract has been initialized.
     */
    function initialized() external view returns (bool);

    /**
     * @notice Checks that the provided permission data are valid for the provided tokenIds.
     * @param tokenIds_ The token ids to check.
     * @param permitterData_ data used by the permitter to perform checking.
     * @return permitted Whether or not the tokenIds are permitted to be added to the pool.
     */
    function checkPermitterData(uint256[] calldata tokenIds_, bytes memory permitterData_)
        external
        view
        returns (bool permitted);
}

// File: contracts/utils/CurveErrorCode.sol



// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.0;

enum CurveErrorCode {
    OK, // No error
    INVALID_NUMITEMS, // The numItem value is 0 or too large
    BASE_PRICE_OVERFLOW, // The updated base price doesn't fit into 128 bits
    SELL_NOT_SUPPORTED, // The pool doesn't support sell
    BUY_NOT_SUPPORTED, // The pool doesn't support buy
    MISSING_SWAP_DATA, // No swap data provided for a pool that requires it
    NOOP // No operation was performed
}

// File: contracts/interface/IOwnerTwoStep.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

/**
 * @title IOwnerTwoStep
 * @notice Interface for the OwnerTwoStep contract
 */
interface IOwnerTwoStep {

    // ***************************************************************
    // * =================== USER INTERFACE ======================== *
    // ***************************************************************

    /**
     * @notice Starts the ownership transfer of the contract to a new account. Replaces the 
     *   pending transfer if there is one. 
     * @dev Can only be called by the current owner.
     * @param newOwner_ The address of the new owner
     */
    function transferOwnership(address newOwner_) external;

    /**
     * @notice Completes the transfer process to a new owner.
     * @dev only callable by the pending owner that is accepting the new ownership.
     */
    function acceptOwnership() external;

    /**
     * @notice Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     */
    function renounceOwnership() external;

    // ***************************************************************
    // * =================== VIEW FUNCTIONS ======================== *
    // ***************************************************************

    /**
     * @notice Getter function to find out the current owner address
     * @return owner The current owner address
     */
    function owner() external view returns (address);

    /**
     * @notice Getter function to find out the pending owner address
     * @dev The pending address is 0 when there is no transfer of owner in progress
     * @return pendingOwner The pending owner address, if any
     */
    function pendingOwner() external view returns (address);
}

// File: contracts/interface/IDittoRouter.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

import {
    Swap,
    NftInSwap,
    RobustSwap,
    RobustNftInSwap,
    ComplexSwap,
    RobustComplexSwap
} from "../struct/RouterStructs.sol";
import { IERC721 } from "../../lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol";
import { ERC20 } from "../../lib/solmate/src/tokens/ERC20.sol";

/**
 * @title Ditto Swap Router Interface
 * @notice Performs swaps between Nfts and ERC20 tokens, across multiple pools, or more complicated multi-swap paths
 * @dev All swaps assume that a single ERC20 token is used for all the pools involved.
 * Swapping using multiple tokens in the same transaction is possible, but the slippage checks and the return values
 * will be meaningless, and may lead to undefined behavior.
 * @dev UX: The sender should grant infinite token approvals to the router in order for Nft-to-Nft swaps to work smoothly.
 * @dev This router has a notion of robust, and non-robust swaps. "Robust" versions of a swap will never revert due to
 * slippage. Instead, users specify a per-swap max cost. If the price changes more than the user specifies, no swap is
 * attempted. This allows users to specify a batch of swaps, and execute as many of them as possible.
 * On non-robust swaps, if any slippage check per trade fails in the chain, the entire transaction reverts.
 */
interface IDittoRouter {
    // ***************************************************************
    // * ============ TRADING ERC20 TOKENS FOR STUFF =============== *
    // ***************************************************************

    /**
     * @notice Swaps ERC20 tokens into specific Nfts using multiple pools.
     * @param swapList The list of pools to trade with and the IDs of the Nfts to buy from each.
     * @param inputAmount The amount of ERC20 tokens to add to the ERC20-to-Nft swaps
     * @param nftRecipient The address that will receive the Nft output
     * @param deadline The Unix timestamp (in seconds) at/after which the swap will revert
     * @return remainingValue The unspent token amount
     */
    function swapTokensForNfts(
        Swap[] calldata swapList,
        uint256 inputAmount,
        address nftRecipient,
        uint256 deadline
    ) external returns (uint256 remainingValue);

    /**
     * @notice Swaps as many ERC20 tokens for specific Nfts as possible, respecting the per-swap max cost.
     * @param swapList The list of pools to trade with and the IDs of the Nfts to buy from each.
     * @param inputAmount The amount of ERC20 tokens to add to the ERC20-to-Nft swaps
     *
     * @param nftRecipient The address that will receive the Nft output
     * @param deadline The Unix timestamp (in seconds) at/after which the swap will revert
     * @return remainingValue The unspent token amount
     */
    function robustSwapTokensForNfts(
        RobustSwap[] calldata swapList,
        uint256 inputAmount,
        address nftRecipient,
        uint256 deadline
    ) external returns (uint256 remainingValue);

    /**
     * @notice Buys Nfts with ERC20, and sells them for tokens in one transaction
     * @param params All the parameters for the swap (packed in struct to avoid stack too deep), containing:
     * - ethToNftSwapList The list of Nfts to buy
     * - nftToTokenSwapList The list of Nfts to sell
     * - inputAmount The max amount of tokens to send (if ERC20)
     * - tokenRecipient The address that receives tokens from the Nfts sold
     * - nftRecipient The address that receives Nfts
     * - deadline UNIX timestamp deadline for the swap
     */
    function robustSwapTokensForNftsAndNftsForTokens(RobustComplexSwap calldata params)
        external
        returns (uint256 remainingValue, uint256 outputAmount);

    // ***************************************************************
    // * ================= TRADING NFTs FOR STUFF ================== *
    // ***************************************************************

    /**
     * @notice Swaps Nfts into ETH/ERC20 using multiple pools.
     * @param swapList The list of pools to trade with and the IDs of the Nfts to sell to each.
     * @param minOutput The minimum acceptable total tokens received
     * @param tokenRecipient The address that will receive the token output
     * @param deadline The Unix timestamp (in seconds) at/after which the swap will revert
     * @return outputAmount The total tokens received
     */
    function swapNftsForTokens(
        NftInSwap[] calldata swapList,
        uint256 minOutput,
        address tokenRecipient,
        uint256 deadline
    ) external returns (uint256 outputAmount);

    /**
     * @notice Swaps as many Nfts for tokens as possible, respecting the per-swap min output
     * @param swapList The list of pools to trade with and the IDs of the Nfts to sell to each.
     * @param tokenRecipient The address that will receive the token output
     * @param deadline The Unix timestamp (in seconds) at/after which the swap will revert
     * @return outputAmount The total ETH/ERC20 received
     */
    function robustSwapNftsForTokens(
        RobustNftInSwap[] calldata swapList,
        address tokenRecipient,
        uint256 deadline
    ) external returns (uint256 outputAmount);

    /**
     * @notice Swaps one set of Nfts into another set of specific Nfts using multiple pools, using
     * an ERC20 token as the intermediary.
     * @param trade The struct containing all Nft-to-ERC20 swaps and ERC20-to-Nft swaps.
     * @param inputAmount The amount of ERC20 tokens to add to the ERC20-to-Nft swaps
     * @param minOutput The minimum acceptable total excess tokens received
     * @param nftRecipient The address that will receive the Nft output
     * @param deadline The Unix timestamp (in seconds) at/after which the swap will revert
     * @return outputAmount The total ERC20 tokens received
     */
    function swapNftsForSpecificNftsThroughTokens(
        ComplexSwap calldata trade,
        uint256 inputAmount,
        uint256 minOutput,
        address nftRecipient,
        uint256 deadline
    ) external returns (uint256 outputAmount);

    // ***************************************************************
    // * ================= RESTRICTED FUNCTIONS ==================== *
    // ***************************************************************

    /**
     * @notice Allows pool contracts to transfer ERC20 tokens directly from
     * the sender, in order to minimize the number of token transfers.
     * @dev Only callable by valid IDittoPools.
     * @param token The ERC20 token to transfer
     * @param from The address to transfer tokens from
     * @param to The address to transfer tokens to
     * @param amount The amount of tokens to transfer
     */
    function poolTransferErc20From(
        ERC20 token,
        address from,
        address to,
        uint256 amount
    ) external;

    /**
     * @notice Allows pool contracts to transfer ERC721 NFTs directly from
     * the sender, in order to minimize the number of token transfers.
     * @dev Only callable by valid IDittoPools.
     * @param nft The ERC721 NFT to transfer
     * @param from The address to transfer tokens from
     * @param to The address to transfer tokens to
     * @param id The ID of the NFT to transfer
     */
    function poolTransferNftFrom(IERC721 nft, address from, address to, uint256 id) external;
}

// File: contracts/interface/IPoolManager.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

/**
 * @title IPoolManager
 * @notice Interface for the PoolManager contract
 */
interface IPoolManager {
    /**
     * @notice Initializes the permitter contract with some initial state.
     * @param dittoPool_ the address of the DittoPool that this manager is managing.
     * @param data_ any data necessary for initializing the permitter.
     */
    function initialize(address dittoPool_, bytes memory data_) external;

    /**
     * @notice Returns whether or not the contract has been initialized.
     * @return initialized Whether or not the contract has been initialized.
     */
    function initialized() external view returns (bool);

    /**
     * @notice Change the base price charged to buy an NFT from the pair
     * @param newBasePrice_ New base price: now NFTs purchased at this price, sold at `newBasePrice_ + Delta`
     */
    function changeBasePrice(uint128 newBasePrice_) external;

    /**
     * @notice Change the delta parameter associated with the bonding curve
     * @dev see the bonding curve documentation on bonding curves for additional information
     * Each bonding curve uses delta differently, but in general it is used as an input
     * to determine the next price on the bonding curve
     * @param newDelta_ New delta parameter
     */
    function changeDelta(uint128 newDelta_) external;

    /**
     * @notice Change the pool lp fee, set by owner, paid to LPers only when they are the counterparty in a trade
     * @param newFeeLp_ New fee, in wei / 1e18, charged by the pool for trades with it (i.e. 1% = 0.01e18)
     */
    function changeLpFee(uint96 newFeeLp_) external;

    /**
     * @notice Change the pool admin fee, set by owner, paid to admin (or whoever they want)
     * @param newFeeAdmin_ New fee, in wei / 1e18, charged by the pool for trades with it (i.e. 1% = 0.01e18)
     */
    function changeAdminFee(uint96 newFeeAdmin_) external;

    /**
     * @notice Change who the pool admin fee for this pool is sent to.
     * @param newAdminFeeRecipient_ New address to send admin fees to.
     */
    function changeAdminFeeRecipient(address newAdminFeeRecipient_) external;

    /**
     * @notice Change the owner of the underlying DittoPool, functions independently of PoolManager
     *   ownership transfer.
     * @param newOwner_ The new owner of the underlying DittoPool
     */
    function transferPoolOwnership(address newOwner_) external;
}

// File: lib/openzeppelin-contracts/contracts/utils/introspection/IERC165.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.19;

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

// File: lib/openzeppelin-contracts/contracts/utils/math/Math.sol



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

pragma solidity ^0.8.19;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Muldiv operation overflow.
     */
    error MathOverflowedMulDiv();

    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v5.0._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v5.0._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v5.0._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v5.0._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v5.0._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

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

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

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

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            return a / b;
        }

        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

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

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

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            if (denominator <= prod1) {
                revert MathOverflowedMulDiv();
            }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

// File: lib/openzeppelin-contracts/contracts/utils/math/SignedMath.sol



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

pragma solidity ^0.8.19;

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

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

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

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

// File: contracts/struct/RouterStructs.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;

import { IDittoPool } from "../interface/IDittoPool.sol";

/**
 * @notice Basic Struct used by DittoRouter For Specifying trades
 * @dev **pool** the pool to trade with
 * @dev **nftIds** which Nfts you wish to buy out of or sell into the pool
 */
struct Swap {
    IDittoPool pool;
    uint256[] nftIds;
    bytes swapData;
}

/**
 * @notice Struct used by DittoRouter when selling Nfts into a pool.
 * @dev **swapInfo** Swap info with pool and and Nfts being traded
 * @dev **lpIds** The LP Position TokenIds of the counterparties you wish to sell to in the pool
 * @dev **permitterData** Optional: data to pass to the pool for permission checks that the tokenIds are allowed in the pool
 */
struct NftInSwap {
    IDittoPool pool;
    uint256[] nftIds;
    uint256[] lpIds;
    bytes permitterData;
    bytes swapData;
}

/**
 * @notice Struct used for "robust" swaps that may have partial fills buying NFTs out of a pool
 * @dev **swapInfo** Swap info with pool and and Nfts being traded
 * @dev **maxCost** The maximum amount of tokens you are willing to pay for the Nfts total
 */
struct RobustSwap {
    IDittoPool pool;
    uint256[] nftIds;
    uint256 maxCost;
    bytes swapData;
}

/**
 * @notice Struct used for "robust" swaps that may have partial fills selling NFTs into a pool
 * @dev **nftSwapInfo** Swap info with pool, Nfts being traded, lp counterparties, and permitter data
 * @dev **minOutput** The total minimum amount of tokens you are willing to receive for the Nfts you sell, or abort
 */
struct RobustNftInSwap {
    IDittoPool pool;
    uint256[] nftIds;
    uint256[] lpIds;
    bytes permitterData;
    uint256 minOutput;
    bytes swapData;
}

/**
 * @notice DittoRouter struct for complex swaps with tokens bought and sold in one transaction
 * @dev **nftToTokenTrades** array of trade info where you are selling Nfts into pools
 * @dev **tokenToNftTrades** array of trade info where you are buying Nfts out of pools
 */
struct ComplexSwap {
    NftInSwap[] nftToTokenTrades;
    Swap[] tokenToNftTrades;
}

/**
 * @notice DittoRouter struct for robust partially-fillable complex swaps with tokens bought and sold in one transaction
 * @dev **nftToTokenTrades** array of trade info where you are selling Nfts into pools
 * @dev **tokenToNftTrades** array of trade info where you are buying Nfts out of pools
 * @dev **inputAmount** The total amount of tokens you are willing to spend on the Nfts you buy
 * @dev **tokenRecipient** The address to send the tokens to after the swap
 * @dev **nftRecipient** The address to send the Nfts to after the swap
 */
struct RobustComplexSwap {
    RobustSwap[] tokenToNftTrades;
    RobustNftInSwap[] nftToTokenTrades;
    uint256 inputAmount;
    address tokenRecipient;
    address nftRecipient;
    uint256 deadline;
}

// File: lib/solmate/src/tokens/ERC20.sol



// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*///////////////////////////////////////////////////////////////
                                  EVENTS
    //////////////////////////////////////////////////////////////*/

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

    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /*///////////////////////////////////////////////////////////////
                             METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    uint8 public immutable decimals;

    /*///////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

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

    /*///////////////////////////////////////////////////////////////
                             EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/

    bytes32 public constant PERMIT_TYPEHASH =
        keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");

    uint256 internal immutable INITIAL_CHAIN_ID;

    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;

    mapping(address => uint256) public nonces;

    /*///////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;

        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*///////////////////////////////////////////////////////////////
                              ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    /*///////////////////////////////////////////////////////////////
                              EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");

        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            bytes32 digest = keccak256(
                abi.encodePacked(
                    "\x19\x01",
                    DOMAIN_SEPARATOR(),
                    keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
                )
            );

            address recoveredAddress = ecrecover(digest, v, r, s);

            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");

            allowance[recoveredAddress][spender] = value;
        }

        emit Approval(owner, spender, value);
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /*///////////////////////////////////////////////////////////////
                       INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}