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// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.21;

import {IDelegateToken, IERC721Metadata, IERC721Receiver, IERC1155Receiver} from "./interfaces/IDelegateToken.sol";
import {MarketMetadata} from "./MarketMetadata.sol";
import {PrincipalToken} from "./PrincipalToken.sol";

import {ReentrancyGuard} from "openzeppelin/security/ReentrancyGuard.sol";

import {IDelegateRegistry, DelegateTokenErrors as Errors, DelegateTokenStructs as Structs, DelegateTokenHelpers as Helpers} from "./libraries/DelegateTokenLib.sol";
import {DelegateTokenStorageHelpers as StorageHelpers} from "./libraries/DelegateTokenStorageHelpers.sol";
import {DelegateTokenRegistryHelpers as RegistryHelpers, RegistryHashes} from "./libraries/DelegateTokenRegistryHelpers.sol";
import {DelegateTokenTransferHelpers as TransferHelpers, SafeERC20, IERC721, IERC20, IERC1155} from "./libraries/DelegateTokenTransferHelpers.sol";

contract DelegateToken is ReentrancyGuard, IDelegateToken {
    /*//////////////////////////////////////////////////////////////
    /                           IMMUTABLES                         /
    //////////////////////////////////////////////////////////////*/

    /// @inheritdoc IDelegateToken
    address public immutable override delegateRegistry;

    /// @inheritdoc IDelegateToken
    address public immutable override principalToken;

    /// @inheritdoc IDelegateToken
    address public immutable marketMetadata;

    /*//////////////////////////////////////////////////////////////
    /                            STORAGE                           /
    //////////////////////////////////////////////////////////////*/

    /// @dev delegateId, a hash of (msg.sender, salt), points a unique id to the StoragePosition
    mapping(uint256 delegateTokenId => uint256[3] info) internal delegateTokenInfo;

    /// @notice mapping for ERC721 balances
    mapping(address delegateTokenHolder => uint256 balance) internal balances;

    /// @notice approve for all mapping
    mapping(address account => mapping(address operator => bool enabled)) internal accountOperator;

    /// @notice internal variables for Principle Token callbacks
    Structs.Uint256 internal principalMintAuthorization = Structs.Uint256(StorageHelpers.MINT_NOT_AUTHORIZED);
    Structs.Uint256 internal principalBurnAuthorization = Structs.Uint256(StorageHelpers.BURN_NOT_AUTHORIZED);

    /// @notice internal variable 11155 callbacks
    Structs.Uint256 internal erc1155PullAuthorization = Structs.Uint256(TransferHelpers.ERC1155_NOT_PULLED);

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

    //slither-disable-next-line missing-zero-check
    constructor(address _delegateRegistry, address _principalToken, address _marketMetadata) {
        delegateRegistry = _delegateRegistry;
        principalToken = _principalToken;
        marketMetadata = _marketMetadata;
    }

    /*//////////////////////////////////////////////////////////////
    /                      MULTICALL                               /
    //////////////////////////////////////////////////////////////*/

    function multicall(bytes[] calldata data) external returns (bytes[] memory results) {
        results = new bytes[](data.length);
        bool success;
        unchecked {
            for (uint256 i = 0; i < data.length; ++i) {
                //slither-disable-next-line calls-loop,delegatecall-loop
                (success, results[i]) = address(this).delegatecall(data[i]);
                if (!success) revert Errors.MulticallFailed();
            }
        }
    }

    /*//////////////////////////////////////////////////////////////
    /                    INTERFACES                                /
    //////////////////////////////////////////////////////////////*/

    function supportsInterface(bytes4 interfaceId) external pure returns (bool) {
        return interfaceId == 0x2a55205a // ERC165 Interface ID for ERC2981
            || interfaceId == 0x01ffc9a7 // ERC165 Interface ID for ERC165
            || interfaceId == 0x80ac58cd // ERC165 Interface ID for ERC721
            || interfaceId == 0x5b5e139f // ERC165 Interface ID for ERC721Metadata
            || interfaceId == 0x150b7a02 // ERC165 Interface ID for ERC721TokenReceiver
            || interfaceId == 0x4e2312e0; // ERC165 Interface ID for ERC1155TokenReceiver
    }

    /*//////////////////////////////////////////////////////////////
    /                  ERCTOKENRECEIVER METHODS                    /
    //////////////////////////////////////////////////////////////*/

    /// @inheritdoc IERC721Receiver
    function onERC721Received(address operator, address, uint256, bytes calldata) external view returns (bytes4) {
        if (address(this) == operator) return IERC721Receiver.onERC721Received.selector;
        revert Errors.InvalidERC721TransferOperator();
    }

    /// @inheritdoc IERC1155Receiver
    function onERC1155Received(address operator, address, uint256, uint256, bytes calldata) external returns (bytes4) {
        TransferHelpers.revertInvalidERC1155PullCheck(erc1155PullAuthorization, operator);
        return IERC1155Receiver.onERC1155Received.selector;
    }

    /// @inheritdoc IERC1155Receiver
    function onERC1155BatchReceived(address, address, uint256[] calldata, uint256[] calldata, bytes calldata) external pure returns (bytes4) {
        revert Errors.BatchERC1155TransferUnsupported();
    }

    /*//////////////////////////////////////////////////////////////
    /                 ERC721 METHODS                               /
    //////////////////////////////////////////////////////////////*/

    /// @inheritdoc IERC721
    function balanceOf(address delegateTokenHolder) external view returns (uint256) {
        if (delegateTokenHolder == address(0)) revert Errors.DelegateTokenHolderZero();
        return balances[delegateTokenHolder];
    }

    /// @inheritdoc IERC721
    function ownerOf(uint256 delegateTokenId) external view returns (address delegateTokenHolder) {
        delegateTokenHolder = RegistryHelpers.loadTokenHolder(delegateRegistry, StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId));
        if (delegateTokenHolder == address(0)) revert Errors.DelegateTokenHolderZero();
    }

    /// @inheritdoc IERC721
    function getApproved(uint256 delegateTokenId) external view returns (address) {
        StorageHelpers.revertNotMinted(delegateTokenInfo, delegateTokenId);
        return StorageHelpers.readApproved(delegateTokenInfo, delegateTokenId);
    }

    /// @inheritdoc IERC721
    function isApprovedForAll(address account, address operator) external view returns (bool) {
        return accountOperator[account][operator];
    }

    /// @inheritdoc IERC721
    function safeTransferFrom(address from, address to, uint256 delegateTokenId, bytes calldata data) external {
        transferFrom(from, to, delegateTokenId);
        Helpers.revertOnInvalidERC721ReceiverCallback(from, to, delegateTokenId, data);
    }

    /// @inheritdoc IERC721
    function safeTransferFrom(address from, address to, uint256 delegateTokenId) external {
        transferFrom(from, to, delegateTokenId);
        Helpers.revertOnInvalidERC721ReceiverCallback(from, to, delegateTokenId);
    }

    /// @inheritdoc IERC721
    function approve(address spender, uint256 delegateTokenId) external {
        bytes32 registryHash = StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId);
        StorageHelpers.revertNotMinted(registryHash, delegateTokenId);
        address delegateTokenHolder = RegistryHelpers.loadTokenHolder(delegateRegistry, registryHash);
        StorageHelpers.revertNotOwner(delegateTokenHolder);
        StorageHelpers.writeApproved(delegateTokenInfo, delegateTokenId, spender);
        emit Approval(delegateTokenHolder, spender, delegateTokenId);
    }

    /// @inheritdoc IERC721
    function setApprovalForAll(address operator, bool approved) external {
        accountOperator[msg.sender][operator] = approved;
        emit ApprovalForAll(msg.sender, operator, approved);
    }

    /// @inheritdoc IERC721
    /// @dev should revert if msg.sender does not meet one of the following:
    ///         - msg.sender is from address
    ///         - from has approved msg.sender for all
    ///         - msg.sender is approved for the delegateTokenId
    /// @dev balances should be incremented / decremented for from / to
    /// @dev approved for the delegateTokenId should be deleted (reset)
    /// @dev must emit the ERC721 Transfer(from, to, delegateTokenId) event
    /// @dev toAmount stored in the related registry delegation must be retrieved directly from registry storage and
    ///      not via the CheckDelegate method to avoid invariants with "[specific rights]" and "" classes
    /// @dev registryHash for the DelegateTokenId must point to the new registry delegation associated with the to
    /// address
    function transferFrom(address from, address to, uint256 delegateTokenId) public {
        if (to == address(0)) revert Errors.ToIsZero();
        bytes32 registryHash = StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId);
        StorageHelpers.revertNotMinted(registryHash, delegateTokenId);
        (address delegateTokenHolder, address underlyingContract) = RegistryHelpers.loadTokenHolderAndContract(delegateRegistry, registryHash);
        if (from != delegateTokenHolder) revert Errors.FromNotDelegateTokenHolder();
        // We can use `from` here instead of delegateTokenHolder since we've just verified that from == delegateTokenHolder
        StorageHelpers.revertNotApprovedOrOperator(accountOperator, delegateTokenInfo, from, delegateTokenId);
        StorageHelpers.incrementBalance(balances, to);
        StorageHelpers.decrementBalance(balances, from);
        StorageHelpers.writeApproved(delegateTokenInfo, delegateTokenId, address(0));
        emit Transfer(from, to, delegateTokenId);
        IDelegateRegistry.DelegationType underlyingType = RegistryHashes.decodeType(registryHash);
        bytes32 underlyingRights = RegistryHelpers.loadRights(delegateRegistry, registryHash);
        bytes32 newRegistryHash = 0;
        if (underlyingType == IDelegateRegistry.DelegationType.ERC721) {
            uint256 underlyingTokenId = RegistryHelpers.loadTokenId(delegateRegistry, registryHash);
            newRegistryHash = RegistryHashes.erc721Hash(address(this), underlyingRights, to, underlyingTokenId, underlyingContract);
            StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash);
            RegistryHelpers.transferERC721(delegateRegistry, registryHash, from, newRegistryHash, to, underlyingRights, underlyingContract, underlyingTokenId);
        } else if (underlyingType == IDelegateRegistry.DelegationType.ERC20) {
            newRegistryHash = RegistryHashes.erc20Hash(address(this), underlyingRights, to, underlyingContract);
            StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash);
            RegistryHelpers.transferERC20(
                delegateRegistry,
                registryHash,
                from,
                newRegistryHash,
                to,
                StorageHelpers.readUnderlyingAmount(delegateTokenInfo, delegateTokenId),
                underlyingRights,
                underlyingContract
            );
        } else if (underlyingType == IDelegateRegistry.DelegationType.ERC1155) {
            uint256 underlyingTokenId = RegistryHelpers.loadTokenId(delegateRegistry, registryHash);
            newRegistryHash = RegistryHashes.erc1155Hash(address(this), underlyingRights, to, underlyingTokenId, underlyingContract);
            StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash);
            RegistryHelpers.transferERC1155(
                delegateRegistry,
                registryHash,
                from,
                newRegistryHash,
                to,
                StorageHelpers.readUnderlyingAmount(delegateTokenInfo, delegateTokenId),
                underlyingRights,
                underlyingContract,
                underlyingTokenId
            );
        }
    }

    /*//////////////////////////////////////////////////////////////
    /                EXTENDED ERC721 METHODS                       /
    //////////////////////////////////////////////////////////////*/

    /// @inheritdoc IERC721Metadata
    function name() external pure returns (string memory) {
        return "Delegate Token";
    }

    /// @inheritdoc IERC721Metadata
    function symbol() external pure returns (string memory) {
        return "DT";
    }

    /// @inheritdoc IERC721Metadata
    function tokenURI(uint256 delegateTokenId) external view returns (string memory) {
        return MarketMetadata(marketMetadata).delegateTokenURI(delegateTokenId, getDelegateTokenInfo(delegateTokenId));
    }

    /// @inheritdoc IDelegateToken
    function isApprovedOrOwner(address spender, uint256 delegateTokenId) external view returns (bool) {
        bytes32 registryHash = StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId);
        StorageHelpers.revertNotMinted(registryHash, delegateTokenId);
        address delegateTokenHolder = RegistryHelpers.loadTokenHolder(delegateRegistry, registryHash);
        return spender == delegateTokenHolder || accountOperator[delegateTokenHolder][spender] || StorageHelpers.readApproved(delegateTokenInfo, delegateTokenId) == spender;
    }

    /// @inheritdoc IDelegateToken
    function baseURI() external view returns (string memory) {
        return MarketMetadata(marketMetadata).baseURI();
    }

    /// @inheritdoc IDelegateToken
    function contractURI() external view returns (string memory) {
        return MarketMetadata(marketMetadata).delegateTokenContractURI();
    }

    function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount) {
        (receiver, royaltyAmount) = MarketMetadata(marketMetadata).royaltyInfo(tokenId, salePrice);
    }

    /*//////////////////////////////////////////////////////////////
    /                   DELEGATE TOKEN METHODS                     /
    //////////////////////////////////////////////////////////////*/

    /// @inheritdoc IDelegateToken
    function getDelegateTokenInfo(uint256 delegateTokenId) public view returns (Structs.DelegateInfo memory delegateInfo) {
        bytes32 registryHash = StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId);
        StorageHelpers.revertNotMinted(registryHash, delegateTokenId);
        delegateInfo.tokenType = RegistryHashes.decodeType(registryHash);
        (delegateInfo.delegateHolder, delegateInfo.tokenContract) = RegistryHelpers.loadTokenHolderAndContract(delegateRegistry, registryHash);
        delegateInfo.rights = RegistryHelpers.loadRights(delegateRegistry, registryHash);
        delegateInfo.principalHolder = IERC721(principalToken).ownerOf(delegateTokenId);
        delegateInfo.expiry = StorageHelpers.readExpiry(delegateTokenInfo, delegateTokenId);
        if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC20) delegateInfo.tokenId = 0;
        else delegateInfo.tokenId = RegistryHelpers.loadTokenId(delegateRegistry, registryHash);
        if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC721) delegateInfo.amount = 0;
        else delegateInfo.amount = StorageHelpers.readUnderlyingAmount(delegateTokenInfo, delegateTokenId);
    }

    /// @inheritdoc IDelegateToken
    function getDelegateTokenId(address caller, uint256 salt) external view returns (uint256 delegateTokenId) {
        delegateTokenId = Helpers.delegateIdNoRevert(caller, salt);
        StorageHelpers.revertAlreadyExisted(delegateTokenInfo, delegateTokenId);
    }

    /// @inheritdoc IDelegateToken
    function burnAuthorizedCallback() external view {
        StorageHelpers.checkBurnAuthorized(principalToken, principalBurnAuthorization);
    }

    /// @inheritdoc IDelegateToken
    function mintAuthorizedCallback() external view {
        StorageHelpers.checkMintAuthorized(principalToken, principalMintAuthorization);
    }

    /// @inheritdoc IDelegateToken
    function create(Structs.DelegateInfo calldata delegateInfo, uint256 salt) external nonReentrant returns (uint256 delegateTokenId) {
        TransferHelpers.pullAssetsAndCheckType(erc1155PullAuthorization, delegateInfo);
        Helpers.revertOldExpiry(delegateInfo.expiry);
        if (delegateInfo.delegateHolder == address(0)) revert Errors.ToIsZero();
        delegateTokenId = Helpers.delegateIdNoRevert(msg.sender, salt);
        StorageHelpers.revertAlreadyExisted(delegateTokenInfo, delegateTokenId);
        StorageHelpers.incrementBalance(balances, delegateInfo.delegateHolder);
        StorageHelpers.writeExpiry(delegateTokenInfo, delegateTokenId, delegateInfo.expiry);
        emit Transfer(address(0), delegateInfo.delegateHolder, delegateTokenId);
        bytes32 newRegistryHash = 0;
        if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC721) {
            newRegistryHash = RegistryHashes.erc721Hash(address(this), delegateInfo.rights, delegateInfo.delegateHolder, delegateInfo.tokenId, delegateInfo.tokenContract);
            StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash);
            RegistryHelpers.delegateERC721(delegateRegistry, newRegistryHash, delegateInfo);
        } else if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC20) {
            StorageHelpers.writeUnderlyingAmount(delegateTokenInfo, delegateTokenId, delegateInfo.amount);
            newRegistryHash = RegistryHashes.erc20Hash(address(this), delegateInfo.rights, delegateInfo.delegateHolder, delegateInfo.tokenContract);
            StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash);
            RegistryHelpers.incrementERC20(delegateRegistry, newRegistryHash, delegateInfo);
        } else if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC1155) {
            StorageHelpers.writeUnderlyingAmount(delegateTokenInfo, delegateTokenId, delegateInfo.amount);
            newRegistryHash = RegistryHashes.erc1155Hash(address(this), delegateInfo.rights, delegateInfo.delegateHolder, delegateInfo.tokenId, delegateInfo.tokenContract);
            StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash);
            RegistryHelpers.incrementERC1155(delegateRegistry, newRegistryHash, delegateInfo);
        }
        StorageHelpers.mintPrincipal(principalToken, principalMintAuthorization, delegateInfo.principalHolder, delegateTokenId);
    }

    /// @inheritdoc IDelegateToken
    function extend(uint256 delegateTokenId, uint256 newExpiry) external {
        StorageHelpers.revertNotMinted(delegateTokenInfo, delegateTokenId);
        Helpers.revertOldExpiry(newExpiry);
        uint256 previousExpiry = StorageHelpers.readExpiry(delegateTokenInfo, delegateTokenId);
        if (newExpiry <= previousExpiry) revert Errors.ExpiryTooSmall();
        if (PrincipalToken(principalToken).isApprovedOrOwner(msg.sender, delegateTokenId)) {
            StorageHelpers.writeExpiry(delegateTokenInfo, delegateTokenId, newExpiry);
            emit ExpiryExtended(delegateTokenId, previousExpiry, newExpiry);
            return;
        }
        revert Errors.NotApproved(msg.sender, delegateTokenId);
    }

    /// @inheritdoc IDelegateToken
    function rescind(uint256 delegateTokenId) external {
        transferFrom(
            RegistryHelpers.loadTokenHolder(delegateRegistry, StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId)),
            IERC721(principalToken).ownerOf(delegateTokenId),
            delegateTokenId
        );
    }

    /// @inheritdoc IDelegateToken
    function withdraw(uint256 delegateTokenId) external nonReentrant {
        bytes32 registryHash = StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId);
        StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, bytes32(StorageHelpers.ID_USED));
        // Sets registry pointer to used flag
        StorageHelpers.revertNotMinted(registryHash, delegateTokenId);
        (address delegateTokenHolder, address underlyingContract) = RegistryHelpers.loadTokenHolderAndContract(delegateRegistry, registryHash);
        StorageHelpers.revertInvalidWithdrawalConditions(delegateTokenInfo, accountOperator, delegateTokenId, delegateTokenHolder);
        StorageHelpers.decrementBalance(balances, delegateTokenHolder);
        delete delegateTokenInfo[delegateTokenId][StorageHelpers.PACKED_INFO_POSITION]; // Deletes both expiry and approved
        emit Transfer(delegateTokenHolder, address(0), delegateTokenId);
        IDelegateRegistry.DelegationType delegationType = RegistryHashes.decodeType(registryHash);
        bytes32 underlyingRights = RegistryHelpers.loadRights(delegateRegistry, registryHash);
        if (delegationType == IDelegateRegistry.DelegationType.ERC721) {
            uint256 erc721UnderlyingTokenId = RegistryHelpers.loadTokenId(delegateRegistry, registryHash);
            RegistryHelpers.revokeERC721(delegateRegistry, registryHash, delegateTokenHolder, underlyingContract, erc721UnderlyingTokenId, underlyingRights);
            StorageHelpers.burnPrincipal(principalToken, principalBurnAuthorization, delegateTokenId);
            IERC721(underlyingContract).transferFrom(address(this), msg.sender, erc721UnderlyingTokenId);
        } else if (delegationType == IDelegateRegistry.DelegationType.ERC20) {
            uint256 erc20UnderlyingAmount = StorageHelpers.readUnderlyingAmount(delegateTokenInfo, delegateTokenId);
            StorageHelpers.writeUnderlyingAmount(delegateTokenInfo, delegateTokenId, 0); // Deletes amount
            RegistryHelpers.decrementERC20(delegateRegistry, registryHash, delegateTokenHolder, underlyingContract, erc20UnderlyingAmount, underlyingRights);
            StorageHelpers.burnPrincipal(principalToken, principalBurnAuthorization, delegateTokenId);
            SafeERC20.safeTransfer(IERC20(underlyingContract), msg.sender, erc20UnderlyingAmount);
        } else if (delegationType == IDelegateRegistry.DelegationType.ERC1155) {
            uint256 erc1155UnderlyingAmount = StorageHelpers.readUnderlyingAmount(delegateTokenInfo, delegateTokenId);
            StorageHelpers.writeUnderlyingAmount(delegateTokenInfo, delegateTokenId, 0); // Deletes amount
            uint256 erc1155UnderlyingTokenId = RegistryHelpers.loadTokenId(delegateRegistry, registryHash);
            RegistryHelpers.decrementERC1155(
                delegateRegistry, registryHash, delegateTokenHolder, underlyingContract, erc1155UnderlyingTokenId, erc1155UnderlyingAmount, underlyingRights
            );
            StorageHelpers.burnPrincipal(principalToken, principalBurnAuthorization, delegateTokenId);
            IERC1155(underlyingContract).safeTransferFrom(address(this), msg.sender, erc1155UnderlyingTokenId, erc1155UnderlyingAmount, "");
        }
    }

    /// @inheritdoc IDelegateToken
    function flashloan(Structs.FlashInfo calldata info) external payable nonReentrant {
        StorageHelpers.revertNotOperator(accountOperator, info.delegateHolder);
        if (info.tokenType == IDelegateRegistry.DelegationType.ERC721) {
            RegistryHelpers.revertERC721FlashUnavailable(delegateRegistry, info);
            IERC721(info.tokenContract).transferFrom(address(this), info.receiver, info.tokenId);
            Helpers.revertOnCallingInvalidFlashloan(info);
            TransferHelpers.checkERC721BeforePull(info.amount, info.tokenContract, info.tokenId);
            TransferHelpers.pullERC721AfterCheck(info.tokenContract, info.tokenId);
        } else if (info.tokenType == IDelegateRegistry.DelegationType.ERC20) {
            RegistryHelpers.revertERC20FlashAmountUnavailable(delegateRegistry, info);
            SafeERC20.safeTransfer(IERC20(info.tokenContract), info.receiver, info.amount);
            Helpers.revertOnCallingInvalidFlashloan(info);
            TransferHelpers.checkERC20BeforePull(info.amount, info.tokenContract, info.tokenId);
            TransferHelpers.pullERC20AfterCheck(info.tokenContract, info.amount);
        } else if (info.tokenType == IDelegateRegistry.DelegationType.ERC1155) {
            RegistryHelpers.revertERC1155FlashAmountUnavailable(delegateRegistry, info);
            TransferHelpers.checkERC1155BeforePull(erc1155PullAuthorization, info.amount);
            IERC1155(info.tokenContract).safeTransferFrom(address(this), info.receiver, info.tokenId, info.amount, "");
            Helpers.revertOnCallingInvalidFlashloan(info);
            TransferHelpers.pullERC1155AfterCheck(erc1155PullAuthorization, info.amount, info.tokenContract, info.tokenId);
        }
    }
}

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.4;

import {IERC721Metadata} from "openzeppelin/token/ERC721/extensions/IERC721Metadata.sol";
import {IERC721Receiver} from "openzeppelin/token/ERC721/IERC721Receiver.sol";
import {IERC1155Receiver} from "openzeppelin/token/ERC1155/IERC1155Receiver.sol";
import {IERC2981} from "openzeppelin/interfaces/IERC2981.sol";

import {DelegateTokenStructs as Structs} from "../libraries/DelegateTokenLib.sol";

interface IDelegateToken is IERC721Metadata, IERC721Receiver, IERC1155Receiver, IERC2981 {
    /*//////////////////////////////////////////////////////////////
                             EVENTS
    //////////////////////////////////////////////////////////////*/

    /**
     * To prevent doubled event emissions, the latest version of the DelegateToken uses the ERC721 Transfer(from, to, id) event standard to infer meaning that was
     * previously double covered by "RightsCreated" and "RightsBurned" events
     * A Transfer event with from = address(0) is a "create" event
     * A Transfer event with to = address(0) is a "withdraw" event
     */

    /// @notice Emitted when a principal token holder extends the expiry of the delegate token
    event ExpiryExtended(uint256 indexed delegateTokenId, uint256 previousExpiry, uint256 newExpiry);

    /*//////////////////////////////////////////////////////////////
                      VIEW & INTROSPECTION
    //////////////////////////////////////////////////////////////*/

    /// @notice The v2 delegate registry address
    function delegateRegistry() external view returns (address);

    /// @notice The principal token deployed in tandem with this delegate token
    function principalToken() external view returns (address);

    /// @notice The onchain metadata contract for both DT and PT
    function marketMetadata() external view returns (address);

    /// @notice Image metadata location, but attributes are stored onchain
    function baseURI() external view returns (string memory);

    /// @notice Adapted from solmate's
    /// [ERC721](https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC721.sol)
    function isApprovedOrOwner(address spender, uint256 delegateTokenId) external view returns (bool);

    /**
     * @notice Fetches the info struct of a delegate token
     * @param delegateTokenId The id of the delegateToken to query info for
     * @return delegateInfo The DelegateInfo struct
     */
    function getDelegateTokenInfo(uint256 delegateTokenId) external view returns (Structs.DelegateInfo memory delegateInfo);

    /**
     * @notice Deterministic function for generating a delegateId. Because msg.sender and freely chosen salt are fixed, no griefing
     * @param creator The caller of create
     * @param salt Allows the creation of a new unique id
     * @return delegateId
     */
    function getDelegateTokenId(address creator, uint256 salt) external view returns (uint256 delegateId);

    /// @notice Returns contract-level metadata URI for OpenSea
    /// (reference)[https://docs.opensea.io/docs/contract-level-metadata]
    function contractURI() external view returns (string memory);

    /*//////////////////////////////////////////////////////////////
                         STATE CHANGING
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Create rights token pair pulling underlying token from `msg.sender`
     * @param delegateInfo struct containing the details of the delegate token to be created
     * @param salt A randomly chosen value, never repeated, to generate unique delegateIds for a particular `msg.sender`
     * @return delegateTokenId New rights ID that is also the token ID of both the newly created principal and delegate tokens.
     */
    function create(Structs.DelegateInfo calldata delegateInfo, uint256 salt) external returns (uint256 delegateTokenId);

    /**
     * @notice Allows the principal token owner or any approved operator to extend the expiry of the delegation rights.
     * @param delegateTokenId The ID of the rights being extended.
     * @param newExpiry The absolute timestamp to set the expiry
     */
    function extend(uint256 delegateTokenId, uint256 newExpiry) external;

    /**
     * @notice Allows the delegate owner or any approved operator to return a delegate token to the principal rights holder early, allowing the principal rights holder to redeem
     * the underlying token(s) early
     * @param delegateTokenId Which delegate right to rescind
     */
    function rescind(uint256 delegateTokenId) external;

    /**
     * @notice Allows principal rights owner or approved operator to withdraw the underlying token once the delegation rights have either met their expiration or been rescinded.
     * Can also be called early if the caller is approved or owner of the delegate token (i.e. they wouldn't need to
     * call rescind & withdraw), or approved operator of the delegate token holder
     * "Burns" the delegate token, principal token, and returns the underlying tokens to the caller.
     * @param delegateTokenId id of the corresponding delegate token
     */
    function withdraw(uint256 delegateTokenId) external;

    /**
     * @notice Allows delegate token owner or approved operator to borrow their underlying tokens for the duration of a single atomic transaction
     * @dev At the conclusion of the flashloan transaction, the asset must be held and approved in `msg.sender` address, not `info.receiver`
     * @param info IDelegateFlashloan FlashInfo struct
     */
    function flashloan(Structs.FlashInfo calldata info) external payable;

    /// @notice Callback function for principal token during the create flow
    function burnAuthorizedCallback() external;

    /// @notice Callback function for principal token during the withdraw flow
    function mintAuthorizedCallback() external;
}

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.21;

import {DelegateTokenStructs, DelegateTokenErrors} from "./libraries/DelegateTokenLib.sol";
import {IDelegateRegistry} from "delegate-registry/src/IDelegateRegistry.sol";

import {Ownable2Step} from "openzeppelin/access/Ownable2Step.sol";
import {ERC2981} from "openzeppelin/token/common/ERC2981.sol";

import {Base64} from "openzeppelin/utils/Base64.sol";
import {Strings} from "openzeppelin/utils/Strings.sol";

contract MarketMetadata is Ownable2Step, ERC2981 {
    using Strings for address;
    using Strings for uint256;

    string public baseURI;

    string internal constant DT_NAME = "Delegate Token";
    string internal constant PT_NAME = "Principal Token";
    string internal constant DT_DESCRIPTION =
        "The Delegate Marketplace lets you escrow your token for a chosen time period and receive a token representing its delegate rights. These tokens represent tokenized delegate rights.";
    string internal constant PT_DESCRIPTION =
        "The Delegate Marketplace lets you escrow your token for a chosen time period and receive a token representing its delegate rights. These tokens represents the right to claim the escrowed spot asset once the delegate token expires.";

    constructor(address initialOwner, string memory initialBaseURI) {
        baseURI = initialBaseURI;
        _transferOwnership(initialOwner);
    }

    function setBaseURI(string calldata uri) external onlyOwner {
        baseURI = uri;
    }

    function setDefaultRoyalty(address receiver, uint96 feeNumerator) external onlyOwner {
        _setDefaultRoyalty(receiver, feeNumerator);
    }

    function deleteDefaultRoyalty() external onlyOwner {
        _deleteDefaultRoyalty();
    }

    function delegateTokenContractURI() external view returns (string memory) {
        return string.concat(baseURI, "delegateContract");
    }

    function principalTokenContractURI() external view returns (string memory) {
        return string.concat(baseURI, "principalContract");
    }

    /// @dev Attributes are "collection address", "token id", "expires at", "principal owner address", "delegate status"
    function delegateTokenURI(uint256 delegateTokenId, DelegateTokenStructs.DelegateInfo calldata info) external view returns (string memory) {
        string memory imageUrl = string.concat(baseURI, "delegate/", delegateTokenId.toString());

        // Split attributes construction into two parts to avoid stack-too-deep
        string memory attributes1 = string.concat(
            '[{"trait_type":"Token Type","value":"',
            _tokenTypeToString(info.tokenType),
            '"},{"trait_type":"Principal Holder","value":"',
            info.principalHolder.toHexString(),
            '"},{"trait_type":"Delegate Holder","value":"',
            info.delegateHolder.toHexString(),
            '"},{"trait_type":"Token Contract","value":"',
            info.tokenContract.toHexString()
        );
        string memory attributes2 = string.concat(
            '"},{"trait_type":"Token Id","value":"',
            info.tokenId.toString(),
            '"},{"trait_type":"Token Amount","display_type":"number","value":',
            info.amount.toString(),
            '},{"trait_type":"Rights","value":"',
            fromSmallString(info.rights),
            '"},{"trait_type":"Expiry","display_type":"date","value":',
            info.expiry.toString(),
            "}]"
        );
        string memory attributes = string.concat(attributes1, attributes2);

        string memory metadataString = string.concat('{"name": "', DT_NAME, '","description":"', DT_DESCRIPTION, '","image":"', imageUrl, '","attributes":', attributes, "}");

        return string.concat("data:application/json;base64,", Base64.encode(bytes(metadataString)));
    }

    function principalTokenURI(uint256 delegateTokenId, DelegateTokenStructs.DelegateInfo calldata info) external view returns (string memory) {
        string memory imageUrl = string.concat(baseURI, "principal/", delegateTokenId.toString());

        // Split attributes construction into two parts to avoid stack-too-deep
        string memory attributes1 = string.concat(
            '[{"trait_type":"Token Type","value":"',
            _tokenTypeToString(info.tokenType),
            '"},{"trait_type":"Principal Holder","value":"',
            info.principalHolder.toHexString(),
            '"},{"trait_type":"Delegate Holder","value":"',
            info.delegateHolder.toHexString(),
            '"},{"trait_type":"Token Contract","value":"',
            info.tokenContract.toHexString()
        );
        string memory attributes2 = string.concat(
            '"},{"trait_type":"Token Id","value":"',
            info.tokenId.toString(),
            '"},{"trait_type":"Token Amount","display_type":"number","value":',
            info.amount.toString(),
            '},{"trait_type":"Rights","value":"',
            fromSmallString(info.rights),
            '"},{"trait_type":"Expiry","display_type":"date","value":',
            info.expiry.toString(),
            "}]"
        );
        string memory attributes = string.concat(attributes1, attributes2);

        string memory metadataString = string.concat('{"name": "', PT_NAME, '","description":"', PT_DESCRIPTION, '","image":"', imageUrl, '","attributes":', attributes, "}");

        return string.concat("data:application/json;base64,", Base64.encode(bytes(metadataString)));
    }

    function _tokenTypeToString(IDelegateRegistry.DelegationType tokenType) internal pure returns (string memory) {
        if (tokenType == IDelegateRegistry.DelegationType.ALL) {
            return "ALL";
        } else if (tokenType == IDelegateRegistry.DelegationType.CONTRACT) {
            return "CONTRACT";
        } else if (tokenType == IDelegateRegistry.DelegationType.ERC721) {
            return "ERC721";
        } else if (tokenType == IDelegateRegistry.DelegationType.ERC20) {
            return "ERC20";
        } else if (tokenType == IDelegateRegistry.DelegationType.ERC1155) {
            return "ERC1155";
        } else {
            revert DelegateTokenErrors.InvalidTokenType(tokenType);
        }
    }

    /// @dev Returns a string from a small bytes32 string.
    function fromSmallString(bytes32 smallString) internal pure returns (string memory result) {
        if (smallString == bytes32(0)) return result;
        /// @solidity memory-safe-assembly
        assembly {
            result := mload(0x40)
            let n
            for {} 1 {} {
                n := add(n, 1)
                if iszero(byte(n, smallString)) { break } // Scan for '\0'.
            }
            mstore(result, n)
            let o := add(result, 0x20)
            mstore(o, smallString)
            mstore(add(o, n), 0)
            mstore(0x40, add(result, 0x40))
        }
    }
}

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.21;

import {IDelegateToken} from "./interfaces/IDelegateToken.sol";

import {ERC721} from "openzeppelin-contracts/contracts/token/ERC721/ERC721.sol";
import {IERC2981} from "openzeppelin-contracts/contracts/interfaces/IERC2981.sol";
import {MarketMetadata} from "./MarketMetadata.sol";

/// @notice A simple NFT that doesn't store any user data, being tightly linked to the stateful Delegate Token.
/// @notice The holder of the PT is eligible to reclaim the escrowed NFT when the DT expires or is burned.
contract PrincipalToken is ERC721("Principal Token", "PT"), IERC2981 {
    IDelegateToken public immutable delegateToken;

    error DelegateTokenZero();
    error CallerNotDelegateToken();
    error NotApproved(address spender, uint256 id);

    constructor(address _delegateToken) {
        if (_delegateToken == address(0)) revert DelegateTokenZero();
        delegateToken = IDelegateToken(_delegateToken);
    }

    function _checkDelegateTokenCaller() internal view {
        if (msg.sender == address(delegateToken)) return;
        revert CallerNotDelegateToken();
    }

    /// @notice Mints a PT if and only if the DT contract calls and has authorized
    function mint(address to, uint256 id) external {
        _checkDelegateTokenCaller();
        _mint(to, id);
        delegateToken.mintAuthorizedCallback();
    }

    /// @notice Burns a PT if the DT contract authorizes and the spender isApprovedOrOwner and DT owner authorizes
    function burn(address spender, uint256 id) external {
        _checkDelegateTokenCaller();
        if (_isApprovedOrOwner(spender, id)) {
            _burn(id);
            delegateToken.burnAuthorizedCallback();
            return;
        }
        revert NotApproved(spender, id);
    }

    function isApprovedOrOwner(address account, uint256 id) external view returns (bool) {
        return _isApprovedOrOwner(account, id);
    }

    /// @inheritdoc IERC2981
    function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount) {
        (receiver, royaltyAmount) = MarketMetadata(delegateToken.marketMetadata()).royaltyInfo(tokenId, salePrice);
    }

    function contractURI() external view returns (string memory) {
        return MarketMetadata(delegateToken.marketMetadata()).principalTokenContractURI();
    }

    function tokenURI(uint256 id) public view override returns (string memory) {
        _requireMinted(id);
        return MarketMetadata(delegateToken.marketMetadata()).principalTokenURI(id, delegateToken.getDelegateTokenInfo(id));
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.4;

import {IDelegateRegistry} from "delegate-registry/src/IDelegateRegistry.sol";
import {IDelegateFlashloan} from "../interfaces/IDelegateFlashloan.sol";
import {IERC721Receiver} from "openzeppelin/token/ERC721/IERC721Receiver.sol";

library DelegateTokenStructs {
    struct Uint256 {
        uint256 flag;
    }

    /// @notice Struct for creating delegate tokens and returning their information
    struct DelegateInfo {
        address principalHolder;
        IDelegateRegistry.DelegationType tokenType;
        address delegateHolder;
        uint256 amount;
        address tokenContract;
        uint256 tokenId; // The id of the underlying escrowed token, not the delegate token
        bytes32 rights;
        uint256 expiry; // Expires when block.timestamp >= expiry
    }

    struct FlashInfo {
        address receiver; // The address to receive the loaned assets
        address delegateHolder; // The holder of the delegation
        IDelegateRegistry.DelegationType tokenType; // The type of contract, e.g. ERC20
        address tokenContract; // The contract of the underlying being loaned
        uint256 tokenId; // The tokenId of the underlying being loaned, if applicable
        uint256 amount; // The amount being lent, if applicable
        bytes data; // Arbitrary data structure, intended to contain user-defined parameters
    }
}

library DelegateTokenErrors {
    error MulticallFailed();

    error DelegateTokenHolderZero();
    error ToIsZero();

    error NotERC721Receiver();
    error InvalidERC721TransferOperator();
    error ERC1155PullNotRequested(address operator);
    error BatchERC1155TransferUnsupported();

    error InsufficientAllowanceOrInvalidToken();
    error CallerNotOwnerOrInvalidToken();

    error NotOwner(address caller, address account);
    error NotOperator(address caller, address account);
    error NotApproved(address caller, uint256 delegateTokenId);

    error FromNotDelegateTokenHolder();

    error HashMismatch();

    error NotMinted(uint256 delegateTokenId);
    error AlreadyExisted(uint256 delegateTokenId);
    error WithdrawNotAvailable(uint256 delegateTokenId, uint256 expiry, uint256 timestamp);

    error ExpiryInPast();
    error ExpiryTooLarge();
    error ExpiryTooSmall();

    error WrongAmountForType(IDelegateRegistry.DelegationType tokenType, uint256 wrongAmount);
    error WrongTokenIdForType(IDelegateRegistry.DelegationType tokenType, uint256 wrongTokenId);
    error InvalidTokenType(IDelegateRegistry.DelegationType tokenType);

    error ERC721FlashUnavailable();
    error ERC20FlashAmountUnavailable();
    error ERC1155FlashAmountUnavailable();

    error BurnNotAuthorized();
    error MintNotAuthorized();
    error CallerNotPrincipalToken();
    error BurnAuthorized();
    error MintAuthorized();

    error ERC1155Pulled();
    error ERC1155NotPulled();
}

library DelegateTokenHelpers {
    function revertOnCallingInvalidFlashloan(DelegateTokenStructs.FlashInfo calldata info) internal {
        if (IDelegateFlashloan(info.receiver).onFlashloan{value: msg.value}(msg.sender, info) == IDelegateFlashloan.onFlashloan.selector) return;
        revert IDelegateFlashloan.InvalidFlashloan();
    }

    function revertOnInvalidERC721ReceiverCallback(address from, address to, uint256 delegateTokenId, bytes calldata data) internal {
        if (to.code.length == 0 || IERC721Receiver(to).onERC721Received(msg.sender, from, delegateTokenId, data) == IERC721Receiver.onERC721Received.selector) return;
        revert DelegateTokenErrors.NotERC721Receiver();
    }

    function revertOnInvalidERC721ReceiverCallback(address from, address to, uint256 delegateTokenId) internal {
        if (to.code.length == 0 || IERC721Receiver(to).onERC721Received(msg.sender, from, delegateTokenId, "") == IERC721Receiver.onERC721Received.selector) return;
        revert DelegateTokenErrors.NotERC721Receiver();
    }

    /// @dev won't revert if expiry is too large (i.e. > type(uint96).max)
    function revertOldExpiry(uint256 expiry) internal view {
        //slither-disable-next-line timestamp
        if (block.timestamp < expiry) return;
        revert DelegateTokenErrors.ExpiryInPast();
    }

    function delegateIdNoRevert(address caller, uint256 salt) internal pure returns (uint256) {
        return uint256(keccak256(abi.encode(caller, salt)));
    }
}

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.4;

import {DelegateTokenErrors as Errors, DelegateTokenStructs as Structs} from "./DelegateTokenLib.sol";
import {PrincipalToken} from "../PrincipalToken.sol";

library DelegateTokenStorageHelpers {
    /// @dev Use this to syntactically store the max of the expiry
    uint256 internal constant MAX_EXPIRY = type(uint96).max;

    ///////////// ID Flags /////////////

    /// @dev Standardizes registryHash storage flags to prevent double-creation and griefing
    /// @dev ID_AVAILABLE should be zero since this is the default for a storage slot
    uint256 internal constant ID_AVAILABLE = 0;
    uint256 internal constant ID_USED = 1;

    ///////////// Info positions /////////////

    /// @dev Standardizes storage positions of delegateInfo mapping data
    /// @dev must start at zero and end at 2
    uint256 internal constant REGISTRY_HASH_POSITION = 0;
    uint256 internal constant PACKED_INFO_POSITION = 1; // PACKED (address approved, uint96 expiry)
    uint256 internal constant UNDERLYING_AMOUNT_POSITION = 2; // Not used by 721 delegations

    ///////////// Callback Flags /////////////

    /// @dev all callback flags should be non zero to reduce storage read / write costs
    /// @dev all callback flags should be unique
    /// Principal Token callbacks
    uint256 internal constant MINT_NOT_AUTHORIZED = 1;
    uint256 internal constant MINT_AUTHORIZED = 2;
    uint256 internal constant BURN_NOT_AUTHORIZED = 3;
    uint256 internal constant BURN_AUTHORIZED = 4;

    /// @dev should preserve the expiry in the lower 96 bits in storage, and update the upper 160 bits with approved address
    function writeApproved(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId, address approved) internal {
        uint96 expiry = uint96(delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION]);
        delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION] = (uint256(uint160(approved)) << 96) | expiry;
    }

    /// @dev should preserve approved in the upper 160 bits, and update the lower 96 bits with expiry
    /// @dev should revert if expiry exceeds 96 bits
    function writeExpiry(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId, uint256 expiry) internal {
        if (expiry > MAX_EXPIRY) revert Errors.ExpiryTooLarge();
        address approved = address(uint160(delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION] >> 96));
        delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION] = (uint256(uint160(approved)) << 96) | expiry;
    }

    function writeRegistryHash(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId, bytes32 registryHash) internal {
        delegateTokenInfo[delegateTokenId][REGISTRY_HASH_POSITION] = uint256(registryHash);
    }

    function writeUnderlyingAmount(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId, uint256 underlyingAmount) internal {
        delegateTokenInfo[delegateTokenId][UNDERLYING_AMOUNT_POSITION] = underlyingAmount;
    }

    function incrementBalance(mapping(address delegateTokenHolder => uint256 balance) storage balances, address delegateTokenHolder) internal {
        unchecked {
            ++balances[delegateTokenHolder];
        } // Infeasible that this will overflow
    }

    function decrementBalance(mapping(address delegateTokenHolder => uint256 balance) storage balances, address delegateTokenHolder) internal {
        unchecked {
            --balances[delegateTokenHolder];
        } // Reasonable to expect this not to underflow
    }

    /// @notice helper function for burning a principal token
    /// @dev must revert if burnAuthorized is not set to BURN_NOT_AUTHORIZED flag
    function burnPrincipal(address principalToken, Structs.Uint256 storage principalBurnAuthorization, uint256 delegateTokenId) internal {
        if (principalBurnAuthorization.flag == BURN_NOT_AUTHORIZED) {
            principalBurnAuthorization.flag = BURN_AUTHORIZED;
            PrincipalToken(principalToken).burn(msg.sender, delegateTokenId);
            principalBurnAuthorization.flag = BURN_NOT_AUTHORIZED;
            return;
        }
        revert Errors.BurnAuthorized();
    }

    /// @notice helper function for minting a principal token
    /// @dev must revert if mintAuthorized has already been set to MINT_AUTHORIZED flag
    function mintPrincipal(address principalToken, Structs.Uint256 storage principalMintAuthorization, address principalRecipient, uint256 delegateTokenId) internal {
        if (principalMintAuthorization.flag == MINT_NOT_AUTHORIZED) {
            principalMintAuthorization.flag = MINT_AUTHORIZED;
            PrincipalToken(principalToken).mint(principalRecipient, delegateTokenId);
            principalMintAuthorization.flag = MINT_NOT_AUTHORIZED;
            return;
        }
        revert Errors.MintAuthorized();
    }

    /// @dev must revert if delegate token did not call burn on the Principal Token for the delegateTokenId
    /// @dev must revert if principal token is not the caller
    function checkBurnAuthorized(address principalToken, Structs.Uint256 storage principalBurnAuthorization) internal view {
        principalIsCaller(principalToken);
        if (principalBurnAuthorization.flag == BURN_AUTHORIZED) return;
        revert Errors.BurnNotAuthorized();
    }

    /// @dev must revert if delegate token did not call burn on the Principal Token for the delegateTokenId
    /// @dev must revert if principal token is not the caller
    function checkMintAuthorized(address principalToken, Structs.Uint256 storage principalMintAuthorization) internal view {
        principalIsCaller(principalToken);
        if (principalMintAuthorization.flag == MINT_AUTHORIZED) return;
        revert Errors.MintNotAuthorized();
    }

    /// @notice helper function to revert if caller is not Principal Token
    /// @dev must revert if msg.sender is not the principal token
    function principalIsCaller(address principalToken) internal view {
        if (msg.sender == principalToken) return;
        revert Errors.CallerNotPrincipalToken();
    }

    function readApproved(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view returns (address) {
        return address(uint160(delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION] >> 96));
    }

    function readExpiry(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view returns (uint256) {
        return uint96(delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION]);
    }

    function readRegistryHash(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view returns (bytes32) {
        return bytes32(delegateTokenInfo[delegateTokenId][REGISTRY_HASH_POSITION]);
    }

    function readUnderlyingAmount(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view returns (uint256) {
        return delegateTokenInfo[delegateTokenId][UNDERLYING_AMOUNT_POSITION];
    }

    function revertNotOwner(address account) internal view {
        if (msg.sender == account) return;
        revert Errors.NotOwner(msg.sender, account);
    }

    function revertNotOperator(mapping(address account => mapping(address operator => bool enabled)) storage accountOperator, address account) internal view {
        if (msg.sender == account || accountOperator[account][msg.sender]) return;
        revert Errors.NotOperator(msg.sender, account);
    }

    function revertNotApprovedOrOperator(
        mapping(address account => mapping(address operator => bool enabled)) storage accountOperator,
        mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo,
        address account,
        uint256 delegateTokenId
    ) internal view {
        if (msg.sender == account || accountOperator[account][msg.sender] || msg.sender == readApproved(delegateTokenInfo, delegateTokenId)) return;
        revert Errors.NotApproved(msg.sender, delegateTokenId);
    }

    /// @dev should only revert if expiry has not expired AND caller is not the delegateTokenHolder AND not approved for the delegateTokenId AND not an operator for
    /// delegateTokenHolder
    function revertInvalidWithdrawalConditions(
        mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo,
        mapping(address account => mapping(address operator => bool enabled)) storage accountOperator,
        uint256 delegateTokenId,
        address delegateTokenHolder
    ) internal view {
        //slither-disable-next-line timestamp
        if (block.timestamp < readExpiry(delegateTokenInfo, delegateTokenId)) {
            if (msg.sender == delegateTokenHolder || accountOperator[delegateTokenHolder][msg.sender] || msg.sender == readApproved(delegateTokenInfo, delegateTokenId)) {
                return;
            }
            revert Errors.WithdrawNotAvailable(delegateTokenId, readExpiry(delegateTokenInfo, delegateTokenId), block.timestamp);
        }
    }

    function revertAlreadyExisted(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view {
        if (delegateTokenInfo[delegateTokenId][REGISTRY_HASH_POSITION] == ID_AVAILABLE) return;
        revert Errors.AlreadyExisted(delegateTokenId);
    }

    function revertNotMinted(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view {
        uint256 registryHash = delegateTokenInfo[delegateTokenId][REGISTRY_HASH_POSITION];
        if (registryHash == ID_AVAILABLE || registryHash == ID_USED) {
            revert Errors.NotMinted(delegateTokenId);
        }
    }

    /// @dev does not read from storage, make sure the registryHash of the corresponding delegateTokenId is passed to have the intended effect
    function revertNotMinted(bytes32 registryHash, uint256 delegateTokenId) internal pure {
        if (uint256(registryHash) == ID_AVAILABLE || uint256(registryHash) == ID_USED) {
            revert Errors.NotMinted(delegateTokenId);
        }
    }
}

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.4;

import {RegistryStorage} from "delegate-registry/src/libraries/RegistryStorage.sol";
import {RegistryHashes} from "delegate-registry/src/libraries/RegistryHashes.sol";
import {IDelegateRegistry, DelegateTokenErrors as Errors, DelegateTokenStructs as Structs} from "./DelegateTokenLib.sol";

library DelegateTokenRegistryHelpers {
    /**
     * @notice Loads a delegateTokenHolder directly from a given registryHash
     * @param delegateRegistry The address of the DelegateRegistry v2 contract
     * @param registryHash The hash of the delegation to retrieve data for
     * @return delegateTokenHolder Which is the delegate "to" address corresponding to the registryHash
     * @dev Will not revert or return address(0) if delegation has been 'revoked'
     */
    function loadTokenHolder(address delegateRegistry, bytes32 registryHash) internal view returns (address delegateTokenHolder) {
        unchecked {
            return RegistryStorage.unpackAddress(
                IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_SECOND_PACKED))
            );
        }
    }

    /**
     * @notice Loads a underlyingContract directly from a given registryHash
     * @param delegateRegistry Address of the DelegateRegistry v2 contract
     * @param registryHash The hash of the delegation to retrieve data for
     * @return underlyingContract Which is the "contract_" address corresponding to the registryHash
     * @dev Two slots need to be loaded in the registry given the packed configuration, this function should only be used when you don't need "to" or "from"
     * @dev Will not revert or return address(0) if delegation has been 'revoked`
     */
    function loadContract(address delegateRegistry, bytes32 registryHash) internal view returns (address underlyingContract) {
        unchecked {
            uint256 registryLocation = uint256(RegistryHashes.location(registryHash));
            //slither-disable-next-line unused-return
            (,, underlyingContract) = RegistryStorage.unpackAddresses(
                IDelegateRegistry(delegateRegistry).readSlot(bytes32(registryLocation + RegistryStorage.POSITIONS_FIRST_PACKED)),
                IDelegateRegistry(delegateRegistry).readSlot(bytes32(registryLocation + RegistryStorage.POSITIONS_SECOND_PACKED))
            );
        }
    }

    /**
     * @notice Loads a delegateTokenHolder and a underlyingContract from a given registryHash
     * @param delegateRegistry Address of the DelegateRegistry v2 contract
     * @param registryHash The hash of the delegation to retrieve data for
     * @return delegateTokenHolder Which is the delegate "to" address corresponding to the registryHash
     * @return underlyingContract Which is the "contract_" address corresponding to the registryHash
     * @dev Two slots need to be loaded from the registry given the packed position
     * @dev Will not revert or return address(0), address(0) if delegation has been revoked
     */
    function loadTokenHolderAndContract(address delegateRegistry, bytes32 registryHash) internal view returns (address delegateTokenHolder, address underlyingContract) {
        unchecked {
            uint256 registryLocation = uint256(RegistryHashes.location(registryHash));
            //slither-disable-next-line unused-return
            (, delegateTokenHolder, underlyingContract) = RegistryStorage.unpackAddresses(
                IDelegateRegistry(delegateRegistry).readSlot(bytes32(registryLocation + RegistryStorage.POSITIONS_FIRST_PACKED)),
                IDelegateRegistry(delegateRegistry).readSlot(bytes32(registryLocation + RegistryStorage.POSITIONS_SECOND_PACKED))
            );
        }
    }

    /**
     * @notice Loads the "from" address from a given registryHash
     * @param delegateRegistry Address of the DelegateRegistry v2 contract
     * @param registryHash The hash of the delegation to retrieve data for
     * @dev Will not revert if delegation has been revoked or never existed
     */
    function loadFrom(address delegateRegistry, bytes32 registryHash) internal view returns (address) {
        unchecked {
            return RegistryStorage.unpackAddress(
                IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_FIRST_PACKED))
            );
        }
    }

    /**
     * @notice Loads the "amount" from a given registryHash
     * @param delegateRegistry Address of the DelegateRegistry v2 contract
     * @param registryHash The hash of the delegation to retrieve data for
     */
    function loadAmount(address delegateRegistry, bytes32 registryHash) internal view returns (uint256) {
        unchecked {
            return uint256(IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_AMOUNT)));
        }
    }

    /**
     * @notice Loads the "rights" from a given registryHash
     * @param delegateRegistry Address of the DelegateRegistry v2 contract
     * @param registryHash The hash of the delegation to retrieve data for
     * @dev Will not return empty or revert if delegation has been revoked
     */
    function loadRights(address delegateRegistry, bytes32 registryHash) internal view returns (bytes32) {
        unchecked {
            return IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_RIGHTS));
        }
    }

    /**
     * @notice Loads the "tokenId" from a given registryHash
     * @param delegateRegistry Address of the DelegateRegistry v2 contract
     * @param registryHash The hash of the delegation to retrieve data for
     * @dev Will not revert or return 0 if delegation has been revoked
     */
    function loadTokenId(address delegateRegistry, bytes32 registryHash) internal view returns (uint256) {
        unchecked {
            return uint256(IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_TOKEN_ID)));
        }
    }

    /**
     * @notice Calculates a new decreased value given an "amount" from a given registryHash
     * @param delegateRegistry Address of the DelegateRegistry v2 contract
     * @param registryHash The hash of the delegation to retrieve data for
     * @param decreaseAmount The value to decrement "amount" by
     * @dev Assumes the decreased amount won't underflow with "amount"
     */
    function calculateDecreasedAmount(address delegateRegistry, bytes32 registryHash, uint256 decreaseAmount) internal view returns (uint256) {
        unchecked {
            return
                uint256(IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_AMOUNT))) - decreaseAmount;
        }
    }

    /**
     * @notice Calculates a new increased value given an "amount" from a given registryHash
     * @param delegateRegistry Address of the DelegateRegistry v2 contract
     * @param registryHash The hash of the delegation to retrieve data for
     * @param increaseAmount The value to increment "amount" by
     * @dev Assumes the increased amount won't overflow with "amount"
     */
    function calculateIncreasedAmount(address delegateRegistry, bytes32 registryHash, uint256 increaseAmount) internal view returns (uint256) {
        unchecked {
            return
                uint256(IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_AMOUNT))) + increaseAmount;
        }
    }

    function revertERC721FlashUnavailable(address delegateRegistry, Structs.FlashInfo calldata info) internal view {
        // We touch registry directly to check for active delegation of the respective hash, as bubbling up to contract
        // and all delegations is not required
        // Important to notice that we cannot rely on this method for the fungibles since delegate token doesn't ever
        // delete the fungible delegations
        if (
            loadFrom(delegateRegistry, RegistryHashes.erc721Hash(address(this), "", info.delegateHolder, info.tokenId, info.tokenContract)) == address(this)
                || loadFrom(delegateRegistry, RegistryHashes.erc721Hash(address(this), "flashloan", info.delegateHolder, info.tokenId, info.tokenContract)) == address(this)
        ) return;
        revert Errors.ERC721FlashUnavailable();
    }

    function revertERC20FlashAmountUnavailable(address delegateRegistry, Structs.FlashInfo calldata info) internal view {
        uint256 availableAmount = 0;
        unchecked {
            // We sum the delegation amounts for "flashloan" and "" rights since liquid delegate doesn't allow double spends for different rights
            availableAmount = loadAmount(delegateRegistry, RegistryHashes.erc20Hash(address(this), "flashloan", info.delegateHolder, info.tokenContract))
                + loadAmount(delegateRegistry, RegistryHashes.erc20Hash(address(this), "", info.delegateHolder, info.tokenContract));
        } // Unreasonable that this block will overflow
        if (info.amount > availableAmount) revert Errors.ERC20FlashAmountUnavailable();
    }

    function revertERC1155FlashAmountUnavailable(address delegateRegistry, Structs.FlashInfo calldata info) internal view {
        uint256 availableAmount = 0;
        unchecked {
            availableAmount = loadAmount(delegateRegistry, RegistryHashes.erc1155Hash(address(this), "flashloan", info.delegateHolder, info.tokenId, info.tokenContract))
                + loadAmount(delegateRegistry, RegistryHashes.erc1155Hash(address(this), "", info.delegateHolder, info.tokenId, info.tokenContract));
        } // Unreasonable that this block will overflow
        if (info.amount > availableAmount) {
            revert Errors.ERC1155FlashAmountUnavailable();
        }
    }

    /// @dev Will not revert if from didn't have a delegation in the first place
    function transferERC721(
        address delegateRegistry,
        bytes32 registryHash,
        address from,
        bytes32 newRegistryHash,
        address to,
        bytes32 underlyingRights,
        address underlyingContract,
        uint256 underlyingTokenId
    ) internal {
        if (
            IDelegateRegistry(delegateRegistry).delegateERC721(from, underlyingContract, underlyingTokenId, underlyingRights, false) == registryHash
                && IDelegateRegistry(delegateRegistry).delegateERC721(to, underlyingContract, underlyingTokenId, underlyingRights, true) == newRegistryHash
        ) return;
        revert Errors.HashMismatch();
    }

    /// @dev Will not revert if from didn't have a delegation in the first place
    /// @dev Will not revert an underflow value if from's existing delegation amount > underlyingAmount
    /// @dev Will not revert an overflow value if to's existing delegation + underlyingAmount > type(uint256).max
    function transferERC20(
        address delegateRegistry,
        bytes32 registryHash,
        address from,
        bytes32 newRegistryHash,
        address to,
        uint256 underlyingAmount,
        bytes32 underlyingRights,
        address underlyingContract
    ) internal {
        if (
            IDelegateRegistry(delegateRegistry).delegateERC20(
                from, underlyingContract, underlyingRights, calculateDecreasedAmount(delegateRegistry, registryHash, underlyingAmount)
            ) == bytes32(registryHash)
                && IDelegateRegistry(delegateRegistry).delegateERC20(
                    to, underlyingContract, underlyingRights, calculateIncreasedAmount(delegateRegistry, newRegistryHash, underlyingAmount)
                ) == newRegistryHash
        ) return;
        revert Errors.HashMismatch();
    }

    /// @dev Will not revert if from didn't have a delegation in the first place
    /// @dev Will not revert an underflow value if from's existing delegation amount > underlyingAmount
    /// @dev Will not revert an overflowed value if to's existing delegation + underlyingAmount > type(uint256).max
    function transferERC1155(
        address delegateRegistry,
        bytes32 registryHash,
        address from,
        bytes32 newRegistryHash,
        address to,
        uint256 underlyingAmount,
        bytes32 underlyingRights,
        address underlyingContract,
        uint256 underlyingTokenId
    ) internal {
        uint256 amount = calculateDecreasedAmount(delegateRegistry, registryHash, underlyingAmount);
        if (IDelegateRegistry(delegateRegistry).delegateERC1155(from, underlyingContract, underlyingTokenId, underlyingRights, amount) != registryHash) {
            revert Errors.HashMismatch();
        }
        amount = calculateIncreasedAmount(delegateRegistry, newRegistryHash, underlyingAmount);
        if (IDelegateRegistry(delegateRegistry).delegateERC1155(to, underlyingContract, underlyingTokenId, underlyingRights, amount) != newRegistryHash) {
            revert Errors.HashMismatch();
        }
    }

    /// @dev Will not revert if delegateHolder had a delegation in the first place
    function delegateERC721(address delegateRegistry, bytes32 newRegistryHash, Structs.DelegateInfo calldata delegateInfo) internal {
        if (
            IDelegateRegistry(delegateRegistry).delegateERC721(delegateInfo.delegateHolder, delegateInfo.tokenContract, delegateInfo.tokenId, delegateInfo.rights, true)
                == newRegistryHash
        ) return;
        revert Errors.HashMismatch();
    }

    /// @dev Will not revert if delegateHolder had a delegation in the first place
    /// @dev Will not revert an overflow value if delegateHolder's existing delegation + amount > type(uint256).max
    function incrementERC20(address delegateRegistry, bytes32 newRegistryHash, Structs.DelegateInfo calldata delegateInfo) internal {
        if (
            IDelegateRegistry(delegateRegistry).delegateERC20(
                delegateInfo.delegateHolder, delegateInfo.tokenContract, delegateInfo.rights, calculateIncreasedAmount(delegateRegistry, newRegistryHash, delegateInfo.amount)
            ) == newRegistryHash
        ) return;
        revert Errors.HashMismatch();
    }

    /// @dev Will not revert if delegateHolder had a delegation in the first place
    /// @dev Will not revert an overflow value if delegateHolder's existing delegation + amount > type(uint256).max
    function incrementERC1155(address delegateRegistry, bytes32 newRegistryHash, Structs.DelegateInfo calldata delegateInfo) internal {
        if (
            IDelegateRegistry(delegateRegistry).delegateERC1155(
                delegateInfo.delegateHolder,
                delegateInfo.tokenContract,
                delegateInfo.tokenId,
                delegateInfo.rights,
                calculateIncreasedAmount(delegateRegistry, newRegistryHash, delegateInfo.amount)
            ) == newRegistryHash
        ) return;
        revert Errors.HashMismatch();
    }

    /// @dev Will not revert if delegateHolder never had a delegation in the first place
    function revokeERC721(
        address delegateRegistry,
        bytes32 registryHash,
        address delegateTokenHolder,
        address underlyingContract,
        uint256 underlyingTokenId,
        bytes32 underlyingRights
    ) internal {
        if (IDelegateRegistry(delegateRegistry).delegateERC721(delegateTokenHolder, underlyingContract, underlyingTokenId, underlyingRights, false) == registryHash) {
            return;
        }
        revert Errors.HashMismatch();
    }

    /// @dev Will not revert if delegateHolder never had a delegation in the first place
    /// @dev Will not revert an underflow value if delegateHolder's existing delegation - underlyingAmount < 0
    function decrementERC20(
        address delegateRegistry,
        bytes32 registryHash,
        address delegateTokenHolder,
        address underlyingContract,
        uint256 underlyingAmount,
        bytes32 underlyingRights
    ) internal {
        if (
            IDelegateRegistry(delegateRegistry).delegateERC20(
                delegateTokenHolder, underlyingContract, underlyingRights, calculateDecreasedAmount(delegateRegistry, registryHash, underlyingAmount)
            ) == registryHash
        ) return;
        revert Errors.HashMismatch();
    }

    /// @dev Will not revert if delegateHolder never had a delegation in the first place
    /// @dev Will not revert an underflow value if delegateHolder's existing delegation - underlyingAmount < 0
    function decrementERC1155(
        address delegateRegistry,
        bytes32 registryHash,
        address delegateTokenHolder,
        address underlyingContract,
        uint256 underlyingTokenId,
        uint256 underlyingAmount,
        bytes32 underlyingRights
    ) internal {
        if (
            IDelegateRegistry(delegateRegistry).delegateERC1155(
                delegateTokenHolder, underlyingContract, underlyingTokenId, underlyingRights, calculateDecreasedAmount(delegateRegistry, registryHash, underlyingAmount)
            ) == registryHash
        ) return;
        revert Errors.HashMismatch();
    }
}

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.4;

import {IDelegateRegistry, DelegateTokenErrors as Errors, DelegateTokenStructs as Structs} from "./DelegateTokenLib.sol";
import {IERC1155} from "openzeppelin/token/ERC1155/IERC1155.sol";
import {IERC721} from "openzeppelin/token/ERC721/IERC721.sol";
import {IERC20} from "openzeppelin/token/ERC20/IERC20.sol";
import {SafeERC20} from "openzeppelin/token/ERC20/utils/SafeERC20.sol";

library DelegateTokenTransferHelpers {
    /// 1155 callbacks
    uint256 internal constant ERC1155_NOT_PULLED = 5;
    uint256 internal constant ERC1155_PULLED = 6;

    /// @dev Pulls assets into escrow, and reverts if delegation type is not ERC20/721/1155
    function pullAssetsAndCheckType(Structs.Uint256 storage erc1155Pulled, Structs.DelegateInfo calldata delegateInfo) internal {
        if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC721) {
            checkERC721BeforePull(delegateInfo.amount, delegateInfo.tokenContract, delegateInfo.tokenId);
            pullERC721AfterCheck(delegateInfo.tokenContract, delegateInfo.tokenId);
        } else if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC20) {
            checkERC20BeforePull(delegateInfo.amount, delegateInfo.tokenContract, delegateInfo.tokenId);
            pullERC20AfterCheck(delegateInfo.tokenContract, delegateInfo.amount);
        } else if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC1155) {
            checkERC1155BeforePull(erc1155Pulled, delegateInfo.amount);
            pullERC1155AfterCheck(erc1155Pulled, delegateInfo.amount, delegateInfo.tokenContract, delegateInfo.tokenId);
        } else {
            revert Errors.InvalidTokenType(delegateInfo.tokenType);
        }
    }

    /// @dev Should revert for a typical 20 / 1155, and pass for a typical 721
    function checkERC721BeforePull(uint256 underlyingAmount, address underlyingContract, uint256 underlyingTokenId) internal view {
        if (underlyingAmount != 0) {
            revert Errors.WrongAmountForType(IDelegateRegistry.DelegationType.ERC721, underlyingAmount);
        }
        if (IERC721(underlyingContract).ownerOf(underlyingTokenId) != msg.sender) {
            revert Errors.CallerNotOwnerOrInvalidToken();
        }
    }

    function pullERC721AfterCheck(address underlyingContract, uint256 underlyingTokenId) internal {
        IERC721(underlyingContract).transferFrom(msg.sender, address(this), underlyingTokenId);
    }

    /// @dev Should revert for a typical 721 / 1155 and pass for a typical 20
    function checkERC20BeforePull(uint256 underlyingAmount, address underlyingContract, uint256 underlyingTokenId) internal view {
        if (underlyingTokenId != 0) {
            revert Errors.WrongTokenIdForType(IDelegateRegistry.DelegationType.ERC20, underlyingTokenId);
        }
        if (underlyingAmount == 0) {
            revert Errors.WrongAmountForType(IDelegateRegistry.DelegationType.ERC20, underlyingAmount);
        }
        if (IERC20(underlyingContract).allowance(msg.sender, address(this)) < underlyingAmount) {
            revert Errors.InsufficientAllowanceOrInvalidToken();
        }
    }

    function pullERC20AfterCheck(address underlyingContract, uint256 pullAmount) internal {
        SafeERC20.safeTransferFrom(IERC20(underlyingContract), msg.sender, address(this), pullAmount);
    }

    function checkERC1155BeforePull(Structs.Uint256 storage erc1155Pulled, uint256 pullAmount) internal {
        if (pullAmount == 0) revert Errors.WrongAmountForType(IDelegateRegistry.DelegationType.ERC1155, pullAmount);
        if (erc1155Pulled.flag == ERC1155_NOT_PULLED) {
            erc1155Pulled.flag = ERC1155_PULLED;
        } else {
            revert Errors.ERC1155Pulled();
        }
    }

    function pullERC1155AfterCheck(Structs.Uint256 storage erc1155Pulled, uint256 pullAmount, address underlyingContract, uint256 underlyingTokenId) internal {
        IERC1155(underlyingContract).safeTransferFrom(msg.sender, address(this), underlyingTokenId, pullAmount, "");
        if (erc1155Pulled.flag == ERC1155_PULLED) {
            revert Errors.ERC1155NotPulled();
        }
    }

    function checkERC1155Pulled(Structs.Uint256 storage erc1155Pulled, address operator) internal returns (bool) {
        if (erc1155Pulled.flag == ERC1155_PULLED && address(this) == operator) {
            erc1155Pulled.flag = ERC1155_NOT_PULLED;
            return true;
        }
        return false;
    }

    function revertInvalidERC1155PullCheck(Structs.Uint256 storage erc1155PullAuthorization, address operator) internal {
        if (!checkERC1155Pulled(erc1155PullAuthorization, operator)) revert Errors.ERC1155PullNotRequested(operator);
    }
}

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

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

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

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

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

pragma solidity ^0.8.0;

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

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

pragma solidity ^0.8.0;

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC2981.sol)

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: CC0-1.0
pragma solidity >=0.8.13;

/**
 * @title IDelegateRegistry
 * @custom:version 2.0
 * @custom:author foobar (0xfoobar)
 * @notice A standalone immutable registry storing delegated permissions from one address to another
 */
interface IDelegateRegistry {
    /// @notice Delegation type, NONE is used when a delegation does not exist or is revoked
    enum DelegationType {
        NONE,
        ALL,
        CONTRACT,
        ERC721,
        ERC20,
        ERC1155
    }

    /// @notice Struct for returning delegations
    struct Delegation {
        DelegationType type_;
        address to;
        address from;
        bytes32 rights;
        address contract_;
        uint256 tokenId;
        uint256 amount;
    }

    /// @notice Emitted when an address delegates or revokes rights for their entire wallet
    event DelegateAll(address indexed from, address indexed to, bytes32 rights, bool enable);

    /// @notice Emitted when an address delegates or revokes rights for a contract address
    event DelegateContract(address indexed from, address indexed to, address indexed contract_, bytes32 rights, bool enable);

    /// @notice Emitted when an address delegates or revokes rights for an ERC721 tokenId
    event DelegateERC721(address indexed from, address indexed to, address indexed contract_, uint256 tokenId, bytes32 rights, bool enable);

    /// @notice Emitted when an address delegates or revokes rights for an amount of ERC20 tokens
    event DelegateERC20(address indexed from, address indexed to, address indexed contract_, bytes32 rights, uint256 amount);

    /// @notice Emitted when an address delegates or revokes rights for an amount of an ERC1155 tokenId
    event DelegateERC1155(address indexed from, address indexed to, address indexed contract_, uint256 tokenId, bytes32 rights, uint256 amount);

    /// @notice Thrown if multicall calldata is malformed
    error MulticallFailed();

    /**
     * -----------  WRITE -----------
     */

    /**
     * @notice Call multiple functions in the current contract and return the data from all of them if they all succeed
     * @param data The encoded function data for each of the calls to make to this contract
     * @return results The results from each of the calls passed in via data
     */
    function multicall(bytes[] calldata data) external payable returns (bytes[] memory results);

    /**
     * @notice Allow the delegate to act on behalf of `msg.sender` for all contracts
     * @param to The address to act as delegate
     * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights
     * @param enable Whether to enable or disable this delegation, true delegates and false revokes
     * @return delegationHash The unique identifier of the delegation
     */
    function delegateAll(address to, bytes32 rights, bool enable) external payable returns (bytes32 delegationHash);

    /**
     * @notice Allow the delegate to act on behalf of `msg.sender` for a specific contract
     * @param to The address to act as delegate
     * @param contract_ The contract whose rights are being delegated
     * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights
     * @param enable Whether to enable or disable this delegation, true delegates and false revokes
     * @return delegationHash The unique identifier of the delegation
     */
    function delegateContract(address to, address contract_, bytes32 rights, bool enable) external payable returns (bytes32 delegationHash);

    /**
     * @notice Allow the delegate to act on behalf of `msg.sender` for a specific ERC721 token
     * @param to The address to act as delegate
     * @param contract_ The contract whose rights are being delegated
     * @param tokenId The token id to delegate
     * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights
     * @param enable Whether to enable or disable this delegation, true delegates and false revokes
     * @return delegationHash The unique identifier of the delegation
     */
    function delegateERC721(address to, address contract_, uint256 tokenId, bytes32 rights, bool enable) external payable returns (bytes32 delegationHash);

    /**
     * @notice Allow the delegate to act on behalf of `msg.sender` for a specific amount of ERC20 tokens
     * @dev The actual amount is not encoded in the hash, just the existence of a amount (since it is an upper bound)
     * @param to The address to act as delegate
     * @param contract_ The address for the fungible token contract
     * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights
     * @param amount The amount to delegate, > 0 delegates and 0 revokes
     * @return delegationHash The unique identifier of the delegation
     */
    function delegateERC20(address to, address contract_, bytes32 rights, uint256 amount) external payable returns (bytes32 delegationHash);

    /**
     * @notice Allow the delegate to act on behalf of `msg.sender` for a specific amount of ERC1155 tokens
     * @dev The actual amount is not encoded in the hash, just the existence of a amount (since it is an upper bound)
     * @param to The address to act as delegate
     * @param contract_ The address of the contract that holds the token
     * @param tokenId The token id to delegate
     * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights
     * @param amount The amount of that token id to delegate, > 0 delegates and 0 revokes
     * @return delegationHash The unique identifier of the delegation
     */
    function delegateERC1155(address to, address contract_, uint256 tokenId, bytes32 rights, uint256 amount) external payable returns (bytes32 delegationHash);

    /**
     * ----------- CHECKS -----------
     */

    /**
     * @notice Check if `to` is a delegate of `from` for the entire wallet
     * @param to The potential delegate address
     * @param from The potential address who delegated rights
     * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only
     * @return valid Whether delegate is granted to act on the from's behalf
     */
    function checkDelegateForAll(address to, address from, bytes32 rights) external view returns (bool);

    /**
     * @notice Check if `to` is a delegate of `from` for the specified `contract_` or the entire wallet
     * @param to The delegated address to check
     * @param contract_ The specific contract address being checked
     * @param from The cold wallet who issued the delegation
     * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only
     * @return valid Whether delegate is granted to act on from's behalf for entire wallet or that specific contract
     */
    function checkDelegateForContract(address to, address from, address contract_, bytes32 rights) external view returns (bool);

    /**
     * @notice Check if `to` is a delegate of `from` for the specific `contract` and `tokenId`, the entire `contract_`, or the entire wallet
     * @param to The delegated address to check
     * @param contract_ The specific contract address being checked
     * @param tokenId The token id for the token to delegating
     * @param from The wallet that issued the delegation
     * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only
     * @return valid Whether delegate is granted to act on from's behalf for entire wallet, that contract, or that specific tokenId
     */
    function checkDelegateForERC721(address to, address from, address contract_, uint256 tokenId, bytes32 rights) external view returns (bool);

    /**
     * @notice Returns the amount of ERC20 tokens the delegate is granted rights to act on the behalf of
     * @param to The delegated address to check
     * @param contract_ The address of the token contract
     * @param from The cold wallet who issued the delegation
     * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only
     * @return balance The delegated balance, which will be 0 if the delegation does not exist
     */
    function checkDelegateForERC20(address to, address from, address contract_, bytes32 rights) external view returns (uint256);

    /**
     * @notice Returns the amount of a ERC1155 tokens the delegate is granted rights to act on the behalf of
     * @param to The delegated address to check
     * @param contract_ The address of the token contract
     * @param tokenId The token id to check the delegated amount of
     * @param from The cold wallet who issued the delegation
     * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only
     * @return balance The delegated balance, which will be 0 if the delegation does not exist
     */
    function checkDelegateForERC1155(address to, address from, address contract_, uint256 tokenId, bytes32 rights) external view returns (uint256);

    /**
     * ----------- ENUMERATIONS -----------
     */

    /**
     * @notice Returns all enabled delegations a given delegate has received
     * @param to The address to retrieve delegations for
     * @return delegations Array of Delegation structs
     */
    function getIncomingDelegations(address to) external view returns (Delegation[] memory delegations);

    /**
     * @notice Returns all enabled delegations an address has given out
     * @param from The address to retrieve delegations for
     * @return delegations Array of Delegation structs
     */
    function getOutgoingDelegations(address from) external view returns (Delegation[] memory delegations);

    /**
     * @notice Returns all hashes associated with enabled delegations an address has received
     * @param to The address to retrieve incoming delegation hashes for
     * @return delegationHashes Array of delegation hashes
     */
    function getIncomingDelegationHashes(address to) external view returns (bytes32[] memory delegationHashes);

    /**
     * @notice Returns all hashes associated with enabled delegations an address has given out
     * @param from The address to retrieve outgoing delegation hashes for
     * @return delegationHashes Array of delegation hashes
     */
    function getOutgoingDelegationHashes(address from) external view returns (bytes32[] memory delegationHashes);

    /**
     * @notice Returns the delegations for a given array of delegation hashes
     * @param delegationHashes is an array of hashes that correspond to delegations
     * @return delegations Array of Delegation structs, return empty structs for nonexistent or revoked delegations
     */
    function getDelegationsFromHashes(bytes32[] calldata delegationHashes) external view returns (Delegation[] memory delegations);

    /**
     * ----------- STORAGE ACCESS -----------
     */

    /**
     * @notice allows external contract to read arbitrary storage slot
     */
    function readSlot(bytes32 location) external view returns (bytes32);

    /**
     * @notice allows external contracts to read an arbitrary array of storage slots
     */
    function readSlots(bytes32[] calldata locations) external view returns (bytes32[] memory);
}

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

pragma solidity ^0.8.0;

import "./Ownable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/common/ERC2981.sol)

pragma solidity ^0.8.0;

import "../../interfaces/IERC2981.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.
 *
 * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for
 * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.
 *
 * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the
 * fee is specified in basis points by default.
 *
 * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See
 * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to
 * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.
 *
 * _Available since v4.5._
 */
abstract contract ERC2981 is IERC2981, ERC165 {
    struct RoyaltyInfo {
        address receiver;
        uint96 royaltyFraction;
    }

    RoyaltyInfo private _defaultRoyaltyInfo;
    mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) {
        return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @inheritdoc IERC2981
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice) public view virtual override returns (address, uint256) {
        RoyaltyInfo memory royalty = _tokenRoyaltyInfo[tokenId];

        if (royalty.receiver == address(0)) {
            royalty = _defaultRoyaltyInfo;
        }

        uint256 royaltyAmount = (salePrice * royalty.royaltyFraction) / _feeDenominator();

        return (royalty.receiver, royaltyAmount);
    }

    /**
     * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a
     * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an
     * override.
     */
    function _feeDenominator() internal pure virtual returns (uint96) {
        return 10000;
    }

    /**
     * @dev Sets the royalty information that all ids in this contract will default to.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual {
        require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
        require(receiver != address(0), "ERC2981: invalid receiver");

        _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator);
    }

    /**
     * @dev Removes default royalty information.
     */
    function _deleteDefaultRoyalty() internal virtual {
        delete _defaultRoyaltyInfo;
    }

    /**
     * @dev Sets the royalty information for a specific token id, overriding the global default.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setTokenRoyalty(uint256 tokenId, address receiver, uint96 feeNumerator) internal virtual {
        require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
        require(receiver != address(0), "ERC2981: Invalid parameters");

        _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator);
    }

    /**
     * @dev Resets royalty information for the token id back to the global default.
     */
    function _resetTokenRoyalty(uint256 tokenId) internal virtual {
        delete _tokenRoyaltyInfo[tokenId];
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Base64.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides a set of functions to operate with Base64 strings.
 *
 * _Available since v4.5._
 */
library Base64 {
    /**
     * @dev Base64 Encoding/Decoding Table
     */
    string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    /**
     * @dev Converts a `bytes` to its Bytes64 `string` representation.
     */
    function encode(bytes memory data) internal pure returns (string memory) {
        /**
         * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence
         * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol
         */
        if (data.length == 0) return "";

        // Loads the table into memory
        string memory table = _TABLE;

        // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter
        // and split into 4 numbers of 6 bits.
        // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up
        // - `data.length + 2`  -> Round up
        // - `/ 3`              -> Number of 3-bytes chunks
        // - `4 *`              -> 4 characters for each chunk
        string memory result = new string(4 * ((data.length + 2) / 3));

        /// @solidity memory-safe-assembly
        assembly {
            // Prepare the lookup table (skip the first "length" byte)
            let tablePtr := add(table, 1)

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

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

            } {
                // Advance 3 bytes
                dataPtr := add(dataPtr, 3)
                let input := mload(dataPtr)

                // To write each character, shift the 3 bytes (18 bits) chunk
                // 4 times in blocks of 6 bits for each character (18, 12, 6, 0)
                // and apply logical AND with 0x3F which is the number of
                // the previous character in the ASCII table prior to the Base64 Table
                // The result is then added to the table to get the character to write,
                // and finally write it in the result pointer but with a left shift
                // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits

                mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance
            }

            // When data `bytes` is not exactly 3 bytes long
            // it is padded with `=` characters at the end
            switch mod(mload(data), 3)
            case 1 {
                mstore8(sub(resultPtr, 1), 0x3d)
                mstore8(sub(resultPtr, 2), 0x3d)
            }
            case 2 {
                mstore8(sub(resultPtr, 1), 0x3d)
            }
        }

        return result;
    }
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

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

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

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

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

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

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

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

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

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

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

        _approve(to, tokenId);
    }

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

        return _tokenApprovals[tokenId];
    }

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

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

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

        _transfer(from, to, tokenId);
    }

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

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

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

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

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

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
    }

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

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

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

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

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

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

        _owners[tokenId] = to;

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

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

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     * This is an internal function that does not check if the sender is authorized to operate on the token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

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

        // Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook
        owner = ERC721.ownerOf(tokenId);

        // Clear approvals
        delete _tokenApprovals[tokenId];

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

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

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

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

        _beforeTokenTransfer(from, to, tokenId, 1);

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

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

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

        emit Transfer(from, to, tokenId);

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

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits an {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

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

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

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

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

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

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

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.4;

import {DelegateTokenStructs as Structs} from "../libraries/DelegateTokenLib.sol";

interface IDelegateFlashloan {
    error InvalidFlashloan();

    /**
     * @dev Receive a delegate flashloan
     * @param initiator Caller of the flashloan
     * @param flashInfo Info about the flashloan
     * @return selector The function selector for onFlashloan
     */
    function onFlashloan(address initiator, Structs.FlashInfo calldata flashInfo) external payable returns (bytes32);
}

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.21;

library RegistryStorage {
    /// @dev Standardizes from storage flags to prevent double-writes in the delegation in/outbox if the same delegation is revoked and rewritten
    address internal constant DELEGATION_EMPTY = address(0);
    address internal constant DELEGATION_REVOKED = address(1);

    /// @dev Standardizes storage positions of delegation data
    uint256 internal constant POSITIONS_FIRST_PACKED = 0; //  | 4 bytes empty | first 8 bytes of contract address | 20 bytes of from address |
    uint256 internal constant POSITIONS_SECOND_PACKED = 1; // |        last 12 bytes of contract address          | 20 bytes of to address   |
    uint256 internal constant POSITIONS_RIGHTS = 2;
    uint256 internal constant POSITIONS_TOKEN_ID = 3;
    uint256 internal constant POSITIONS_AMOUNT = 4;

    /// @dev Used to clean address types of dirty bits with and(address, CLEAN_ADDRESS)
    uint256 internal constant CLEAN_ADDRESS = 0x00ffffffffffffffffffffffffffffffffffffffff;

    /// @dev Used to clean everything but the first 8 bytes of an address
    uint256 internal constant CLEAN_FIRST8_BYTES_ADDRESS = 0xffffffffffffffff << 96;

    /// @dev Used to clean everything but the first 8 bytes of an address in the packed position
    uint256 internal constant CLEAN_PACKED8_BYTES_ADDRESS = 0xffffffffffffffff << 160;

    /**
     * @notice Helper function that packs from, to, and contract_ address to into the two slot configuration
     * @param from The address making the delegation
     * @param to The address receiving the delegation
     * @param contract_ The contract address associated with the delegation (optional)
     * @return firstPacked The firstPacked storage configured with the parameters
     * @return secondPacked The secondPacked storage configured with the parameters
     * @dev Will not revert if from, to, and contract_ are > uint160, any inputs with dirty bits outside the last 20 bytes will be cleaned
     */
    function packAddresses(address from, address to, address contract_) internal pure returns (bytes32 firstPacked, bytes32 secondPacked) {
        assembly {
            firstPacked := or(shl(64, and(contract_, CLEAN_FIRST8_BYTES_ADDRESS)), and(from, CLEAN_ADDRESS))
            secondPacked := or(shl(160, contract_), and(to, CLEAN_ADDRESS))
        }
    }

    /**
     * @notice Helper function that unpacks from, to, and contract_ address inside the firstPacked secondPacked storage configuration
     * @param firstPacked The firstPacked storage to be decoded
     * @param secondPacked The secondPacked storage to be decoded
     * @return from The address making the delegation
     * @return to The address receiving the delegation
     * @return contract_ The contract address associated with the delegation
     * @dev Will not revert if from, to, and contract_ are > uint160, any inputs with dirty bits outside the last 20 bytes will be cleaned
     */
    function unpackAddresses(bytes32 firstPacked, bytes32 secondPacked) internal pure returns (address from, address to, address contract_) {
        assembly {
            from := and(firstPacked, CLEAN_ADDRESS)
            to := and(secondPacked, CLEAN_ADDRESS)
            contract_ := or(shr(64, and(firstPacked, CLEAN_PACKED8_BYTES_ADDRESS)), shr(160, secondPacked))
        }
    }

    /**
     * @notice Helper function that can unpack the from or to address from their respective packed slots in the registry
     * @param packedSlot The slot containing the from or to address
     * @return unpacked The `from` or `to` address
     * @dev Will not work if you want to obtain the contract address, use unpackAddresses
     */
    function unpackAddress(bytes32 packedSlot) internal pure returns (address unpacked) {
        assembly {
            unpacked := and(packedSlot, CLEAN_ADDRESS)
        }
    }
}

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.21;

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

/**
 * @title Library for calculating the hashes and storage locations used in the delegate registry
 *
 * The encoding for the 5 types of delegate registry hashes should be as follows
 *
 * ALL:         keccak256(abi.encodePacked(rights, from, to))
 * CONTRACT:    keccak256(abi.encodePacked(rights, from, to, contract_))
 * ERC721:      keccak256(abi.encodePacked(rights, from, to, contract_, tokenId))
 * ERC20:       keccak256(abi.encodePacked(rights, from, to, contract_))
 * ERC1155:     keccak256(abi.encodePacked(rights, from, to, contract_, tokenId))
 *
 * To avoid collisions between the hashes with respect to type, the hash is shifted left by one byte and the last byte is then encoded with a unique number for the
 * delegation type.
 *
 */
library RegistryHashes {
    /// @dev Used to delete everything but the last byte of a 32 byte word with and(word, EXTRACT_LAST_BYTE)
    uint256 internal constant EXTRACT_LAST_BYTE = 0xff;
    /// @dev uint256 constant for the delegate registry delegation type enumeration, related unit test should fail if these mismatch
    uint256 internal constant ALL_TYPE = 1;
    uint256 internal constant CONTRACT_TYPE = 2;
    uint256 internal constant ERC721_TYPE = 3;
    uint256 internal constant ERC20_TYPE = 4;
    uint256 internal constant ERC1155_TYPE = 5;
    /// @dev uint256 constant for the location of the delegations array in the delegate registry, assumed to be zero
    uint256 internal constant DELEGATION_SLOT = 0;

    /**
     * @notice Helper function to decode last byte of a delegation hash to obtain its delegation type
     * @param inputHash to decode the type from
     * @return decodedType of the delegation
     * @dev function itself will not revert if decodedType > type(IDelegateRegistry.DelegationType).max
     * @dev may lead to a revert with Conversion into non-existent enum type after the function is called if inputHash was encoded with type outside the DelegationType
     * enum range
     */
    function decodeType(bytes32 inputHash) internal pure returns (IDelegateRegistry.DelegationType decodedType) {
        assembly {
            decodedType := and(inputHash, EXTRACT_LAST_BYTE)
        }
    }

    /**
     * @notice Helper function that computes the storage location of a particular delegation array
     * @param inputHash is the hash of the delegation
     * @return computedLocation is the storage key of the delegation array at position 0
     * @dev Storage keys further down the array can be obtained by adding computedLocation with the element position
     * @dev Follows the solidity storage location encoding for a mapping(bytes32 => fixedArray) at the position of the delegationSlot
     */
    function location(bytes32 inputHash) internal pure returns (bytes32 computedLocation) {
        assembly ("memory-safe") {
            // This block only allocates memory in the scratch space
            mstore(0, inputHash)
            mstore(32, DELEGATION_SLOT)
            computedLocation := keccak256(0, 64) // Run keccak256 over bytes in scratch space to obtain the storage key
        }
    }

    /**
     * @notice Helper function to compute delegation hash for all delegation
     * @param from is the address making the delegation
     * @param rights it the rights specified by the delegation
     * @param to is the address receiving the delegation
     * @return hash of the delegation parameters encoded with ALL_TYPE
     * @dev returned hash should be equivalent to keccak256(abi.encodePacked(rights, from, to)) followed by a shift left by 1 byte and writing the delegation type to the
     * cleaned last byte
     * @dev will not revert if from or to are > uint160, any input larger than uint160 for from and to will be cleaned to their last 20 bytes
     */
    function allHash(address from, bytes32 rights, address to) internal pure returns (bytes32 hash) {
        assembly ("memory-safe") {
            // This block only allocates memory after the free memory pointer
            let ptr := mload(64) // Load the free memory pointer
            // Layout the variables from last to first, agnostic to upper 96 bits of address words.
            mstore(add(ptr, 40), to)
            mstore(add(ptr, 20), from)
            mstore(ptr, rights)
            hash := or(shl(8, keccak256(ptr, 72)), ALL_TYPE) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the last
                // byte
        }
    }

    /**
     * @notice Helper function to compute delegation location for all delegation
     * @param from is the address making the delegation
     * @param rights is the rights specified by the delegation
     * @param to is the address receiving the delegation
     * @return computedLocation is the storage location of the all delegation with those parameters in the delegations mapping
     * @dev gives the same location hash as location(allHash(rights, from, to)) would
     * @dev will not revert if from or to are > uint160, any input larger than uint160 for from and to will be cleaned to their last 20 bytes
     */
    function allLocation(address from, bytes32 rights, address to) internal pure returns (bytes32 computedLocation) {
        assembly ("memory-safe") {
            // This block only allocates memory after the free memory pointer and in the scratch space
            let ptr := mload(64) // Load the free memory pointer
            // Layout the variables from last to first, agnostic to upper 96 bits of address words.
            mstore(add(ptr, 40), to)
            mstore(add(ptr, 20), from)
            mstore(ptr, rights)
            mstore(0, or(shl(8, keccak256(ptr, 72)), ALL_TYPE)) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the
                // last byte, and stores the result in the scratch space
            mstore(32, DELEGATION_SLOT)
            computedLocation := keccak256(0, 64) // Runs keccak over the scratch space to obtain the storage key
        }
    }

    /**
     * @notice Helper function to compute delegation hash for contract delegation
     * @param from is the address making the delegation
     * @param rights is the rights specified by the delegation
     * @param to is the address receiving the delegation
     * @param contract_ is the address of the contract specified by the delegation
     * @return hash of the delegation parameters encoded with CONTRACT_TYPE
     * @dev returned hash should be equivalent to keccak256(abi.encodePacked(rights, from, to, contract_)) with the last byte overwritten with CONTRACT_TYPE
     * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes
     */
    function contractHash(address from, bytes32 rights, address to, address contract_) internal pure returns (bytes32 hash) {
        assembly ("memory-safe") {
            // This block only allocates memory after the free memory pointer
            let ptr := mload(64) // Load the free memory pointer
            // Layout the variables from last to first, agnostic to upper 96 bits of address words.
            mstore(add(ptr, 60), contract_)
            mstore(add(ptr, 40), to)
            mstore(add(ptr, 20), from)
            mstore(ptr, rights)
            hash := or(shl(8, keccak256(ptr, 92)), CONTRACT_TYPE) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the last byte
        }
    }

    /**
     * @notice Helper function to compute delegation location for contract delegation
     * @param from is the address making the delegation
     * @param rights is the rights specified by the delegation
     * @param to is the address receiving the delegation
     * @param contract_ is the address of the contract specified by the delegation
     * @return computedLocation is the storage location of the contract delegation with those parameters in the delegations mapping
     * @dev gives the same location hash as location(contractHash(rights, from, to, contract_)) would
     * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes
     */
    function contractLocation(address from, bytes32 rights, address to, address contract_) internal pure returns (bytes32 computedLocation) {
        assembly ("memory-safe") {
            // This block only allocates memory after the free memory pointer and in the scratch space
            let ptr := mload(64) // Load free memory pointer
            // Layout the variables from last to first, agnostic to upper 96 bits of address words.
            mstore(add(ptr, 60), contract_)
            mstore(add(ptr, 40), to)
            mstore(add(ptr, 20), from)
            mstore(ptr, rights)
            mstore(0, or(shl(8, keccak256(ptr, 92)), CONTRACT_TYPE)) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the
                // last byte, and stores the result in the scratch space
            mstore(32, DELEGATION_SLOT)
            computedLocation := keccak256(0, 64) // Runs keccak over the scratch space to obtain the storage key
        }
    }

    /**
     * @notice Helper function to compute delegation hash for ERC721 delegation
     * @param from is the address making the delegation
     * @param rights is the rights specified by the delegation
     * @param to is the address receiving the delegation
     * @param tokenId is the id of the token specified by the delegation
     * @param contract_ is the address of the contract specified by the delegation
     * @return hash of the parameters encoded with ERC721_TYPE
     * @dev returned hash should be equivalent to keccak256(abi.encodePacked(rights, from, to, contract_, tokenId)) with the last byte overwritten with ERC721_TYPE
     * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes
     */
    function erc721Hash(address from, bytes32 rights, address to, uint256 tokenId, address contract_) internal pure returns (bytes32 hash) {
        assembly ("memory-safe") {
            // This block only allocates memory after the free memory pointer
            let ptr := mload(64) // Cache the free memory pointer.
            // Layout the variables from last to first, agnostic to upper 96 bits of address words.
            mstore(add(ptr, 92), tokenId)
            mstore(add(ptr, 60), contract_)
            mstore(add(ptr, 40), to)
            mstore(add(ptr, 20), from)
            mstore(ptr, rights)
            hash := or(shl(8, keccak256(ptr, 124)), ERC721_TYPE) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the last byte
        }
    }

    /**
     * @notice Helper function to compute delegation location for ERC721 delegation
     * @param from is the address making the delegation
     * @param rights is the rights specified by the delegation
     * @param to is the address receiving the delegation
     * @param tokenId is the id of the erc721 token
     * @param contract_ is the address of the erc721 token contract
     * @return computedLocation is the storage location of the erc721 delegation with those parameters in the delegations mapping
     * @dev gives the same location hash as location(erc721Hash(rights, from, to, contract_, tokenId)) would
     * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes
     */
    function erc721Location(address from, bytes32 rights, address to, uint256 tokenId, address contract_) internal pure returns (bytes32 computedLocation) {
        assembly ("memory-safe") {
            // This block only allocates memory after the free memory pointer and in the scratch space
            let ptr := mload(64) // Cache the free memory pointer.
            // Layout the variables from last to first, agnostic to upper 96 bits of address words.
            mstore(add(ptr, 92), tokenId)
            mstore(add(ptr, 60), contract_)
            mstore(add(ptr, 40), to)
            mstore(add(ptr, 20), from)
            mstore(ptr, rights)
            mstore(0, or(shl(8, keccak256(ptr, 124)), ERC721_TYPE)) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the
                // last byte, and stores the result in the scratch space
            mstore(32, DELEGATION_SLOT)
            computedLocation := keccak256(0, 64) // Runs keccak256 over the scratch space to obtain the storage key
        }
    }

    /**
     * @notice Helper function to compute delegation hash for ERC20 delegation
     * @param from is the address making the delegation
     * @param rights is the rights specified by the delegation
     * @param to is the address receiving the delegation
     * @param contract_ is the address of the erc20 token contract
     * @return hash of the parameters encoded with ERC20_TYPE
     * @dev returned hash should be equivalent to keccak256(abi.encodePacked(rights, from, to, contract_)) with the last byte overwritten with ERC20_TYPE
     * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes
     */
    function erc20Hash(address from, bytes32 rights, address to, address contract_) internal pure returns (bytes32 hash) {
        assembly ("memory-safe") {
            // This block only allocates memory after the free memory pointer
            let ptr := mload(64) // Load free memory pointer
            // Layout the variables from last to first, agnostic to upper 96 bits of address words.
            mstore(add(ptr, 60), contract_)
            mstore(add(ptr, 40), to)
            mstore(add(ptr, 20), from)
            mstore(ptr, rights)
            hash := or(shl(8, keccak256(ptr, 92)), ERC20_TYPE) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the last byte
        }
    }

    /**
     * @notice Helper function to compute delegation location for ERC20 delegation
     * @param from is the address making the delegation
     * @param rights is the rights specified by the delegation
     * @param to is the address receiving the delegation
     * @param contract_ is the address of the erc20 token contract
     * @return computedLocation is the storage location of the erc20 delegation with those parameters in the delegations mapping
     * @dev gives the same location hash as location(erc20Hash(rights, from, to, contract_)) would
     * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes
     */
    function erc20Location(address from, bytes32 rights, address to, address contract_) internal pure returns (bytes32 computedLocation) {
        assembly ("memory-safe") {
            // This block only allocates memory after the free memory pointer and in the scratch space
            let ptr := mload(64) // Loads the free memory pointer
            // Layout the variables from last to first, agnostic to upper 96 bits of address words.
            mstore(add(ptr, 60), contract_)
            mstore(add(ptr, 40), to)
            mstore(add(ptr, 20), from)
            mstore(ptr, rights)
            mstore(0, or(shl(8, keccak256(ptr, 92)), ERC20_TYPE)) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the
                // last byte, and stores the result in the scratch space
            mstore(32, DELEGATION_SLOT)
            computedLocation := keccak256(0, 64) // Runs keccak over the scratch space to obtain the storage key
        }
    }

    /**
     * @notice Helper function to compute delegation hash for ERC1155 delegation
     * @param from is the address making the delegation
     * @param rights is the rights specified by the delegation
     * @param to is the address receiving the delegation
     * @param tokenId is the id of the erc1155 token
     * @param contract_ is the address of the erc1155 token contract
     * @return hash of the parameters encoded with ERC1155_TYPE
     * @dev returned hash should be equivalent to keccak256(abi.encodePacked(rights, from, to, contract_, tokenId)) with the last byte overwritten with ERC1155_TYPE
     * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes
     */
    function erc1155Hash(address from, bytes32 rights, address to, uint256 tokenId, address contract_) internal pure returns (bytes32 hash) {
        assembly ("memory-safe") {
            // This block only allocates memory after the free memory pointer
            let ptr := mload(64) // Load the free memory pointer.
            // Layout the variables from last to first, agnostic to upper 96 bits of address words.
            mstore(add(ptr, 92), tokenId)
            mstore(add(ptr, 60), contract_)
            mstore(add(ptr, 40), to)
            mstore(add(ptr, 20), from)
            mstore(ptr, rights)
            hash := or(shl(8, keccak256(ptr, 124)), ERC1155_TYPE) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the last byte
        }
    }

    /**
     * @notice Helper function to compute delegation hash for ERC1155 delegation
     * @param from is the address making the delegation
     * @param rights is the rights specified by the delegation
     * @param to is the address receiving the delegation
     * @param tokenId is the id of the erc1155 token
     * @param contract_ is the address of the erc1155 token contract
     * @return computedLocation is the storage location of the erc1155 delegation with those parameters in the delegations mapping
     * @dev gives the same location hash as location(erc1155Hash(rights, from, to, contract_, tokenId)) would
     * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes
     */
    function erc1155Location(address from, bytes32 rights, address to, uint256 tokenId, address contract_) internal pure returns (bytes32 computedLocation) {
        assembly ("memory-safe") {
            // This block only allocates memory after the free memory pointer and in the scratch space
            let ptr := mload(64) // Cache the free memory pointer.
            // Layout the variables from last to first, agnostic to upper 96 bits of address words.
            mstore(add(ptr, 92), tokenId)
            mstore(add(ptr, 60), contract_)
            mstore(add(ptr, 40), to)
            mstore(add(ptr, 20), from)
            mstore(ptr, rights)
            mstore(0, or(shl(8, keccak256(ptr, 124)), ERC1155_TYPE)) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the
                // last byte, and stores the result in the scratch space
            mstore(32, DELEGATION_SLOT)
            computedLocation := keccak256(0, 64) // Runs keccak over the scratch space to obtain the storage key
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(
        address[] calldata accounts,
        uint256[] calldata ids
    ) external view returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

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

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

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

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

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

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

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

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

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

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

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

pragma solidity ^0.8.0;

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

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

pragma solidity ^0.8.0;

import "../utils/Context.sol";

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

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

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "murky/=lib/murky/src/",
    "openzeppelin/=lib/openzeppelin-contracts/contracts/",
    "delegate-registry/=lib/delegate-registry/",
    "seaport/=lib/seaport/",
    "@rari-capital/solmate/=lib/seaport/lib/solmate/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "seaport-core/=lib/seaport/contracts/",
    "seaport-sol/=lib/seaport/contracts/helpers/sol/",
    "solady/=lib/seaport/lib/solady/",
    "solarray/=lib/seaport/lib/solarray/src/",
    "solmate/=lib/seaport/lib/solmate/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 9999999
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "shanghai",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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00000000000000000000000000000000000000447e69651d841bd8d104bed493000000000000000000000000c73dfd486bc155b8126a366f68a4fefe05ce1dcd000000000000000000000000ba93c25cd7db01b5d8f4b74ae4e3f5e048144834

-----Decoded View---------------
Arg [0] : _delegateRegistry (address): 0x00000000000000447e69651d841bD8D104Bed493
Arg [1] : _principalToken (address): 0xC73dFD486BC155b8126a366F68A4fefe05CE1dCD
Arg [2] : _marketMetadata (address): 0xBa93c25cD7db01b5d8f4b74aE4e3F5e048144834

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000447e69651d841bd8d104bed493
Arg [1] : 000000000000000000000000c73dfd486bc155b8126a366f68a4fefe05ce1dcd
Arg [2] : 000000000000000000000000ba93c25cd7db01b5d8f4b74ae4e3f5e048144834