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// SPDX-License-Identifier: MIT

pragma solidity 0.8.23;

/// @dev Core abstracts of Palette.
import {ERC404} from "./404/ERC404.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";

/// @dev Helper libraries to ensure seamless integration.
import {LibPalette} from "./libraries/Palette.Lib.sol";
import {MerkleProofLib} from "solady/src/utils/MerkleProofLib.sol";
import {SafeTransferLib} from "solady/src/utils/SafeTransferLib.sol";
import {LibString} from "solady/src/utils/LibString.sol";

/// @dev Reference interfaces for consumption.
import {PaletteRenderer} from "./interfaces/PaletteRenderer.sol";

/**
 * @title Palette: 🟦🟪🟨🟥
 * @notice An experimental ERC404 token with phased airdrop claims that combines
 *         the best of ERC20 and ERC721 into a single contract.
 * @author artist: cfw (@iamcfw)
 * @author art dev: orbism (@ArtofOrb)
 * @author contract dev: nftchance (@nftchance | [email protected])
 */
contract Palette is ERC404, Ownable {
    using LibString for uint256;

    /// @dev The address of the account performing the airdrop.
    address public minter;

    /// @dev The URL to the metadata for the tokenURI.
    string public baseTokenURI;

    /// @dev State var to effectively revoke access to transfer control.
    bool public trading;

    /// @dev State var to effectively revoke access to transfer control.
    bool public locked;

    /// @dev Slot for contract render.
    PaletteRenderer public renderer;

    /**
     * @dev Modifier to check if trading is ready.
     * @param $from The address to transfer from.
     */
    modifier onlyTrading(address $from) {
        /// @dev Exempt mints as well as transfers from the owner from
        ///      the trading status check.
        if (trading == false) {
            if ($from != address(0) && $from != owner()) {
                revert LibPalette.TokenLoading();
            }
        }

        _;
    }

    /// @dev Initialize Palette.
    constructor(
        address $owner,
        address $minter,
        string memory $baseTokenURI,
        string memory $name,
        string memory $symbol,
        uint8 $decimals
    ) ERC404($name, $symbol, $decimals) Ownable($owner) {
        /// @dev Set the base token URI.
        baseTokenURI = $baseTokenURI;

        /// @dev Set the minter for the airdrop.
        minter = $minter;
    }

    /**
     * @notice Airdrop all of the tokens to the users.
     * @param $recipients Array of recipients to airdrop to.
     * @param $amounts Array of amounts to airdrop to each recipient.
     */
    function mint(
        address[] calldata $recipients,
        uint256[] calldata $amounts
    ) public payable {
        /// @dev Prevent array issues.
        if ($recipients.length != $amounts.length) {
            revert LibPalette.MintInvalid();
        }

        /// @dev Ensure that the minter is the one calling this function.
        if (msg.sender != minter && msg.sender != owner()) {
            revert LibPalette.MinterInvalid();
        }

        /// @dev Make sure that trading status has not been locked.
        if(locked == true) revert LibPalette.TradingLocked();

        /// @dev Mint the tokens to the recipients.
        for (uint256 i; i < $recipients.length; i++) {
            _mintERC20($recipients[i], $amounts[i]);
        }
    }

    /**
     * @notice Allow the owner to set the ERC721 transfer exempt status.
     * @dev This function is only available to the owner and enables the ability
     *      to prevent NFT conversion for specific addresses.
     * @dev This is used for the liquidity pool as well as a few other instances.
     * @param $account The account to set the ERC721 transfer exempt status of.
     * @param $value The value to set the ERC721 transfer exempt status to.
     */
    function setERC721TransferExempt(
        address $account,
        bool $value
    ) public onlyOwner {
        /// @dev Control the fractionalization allowances.
        _setERC721TransferExempt($account, $value);
    }

    /**
     * @notice Allow the owner to set the base token URI.
     * @dev This function is only available to the owner and enables the ability
     *      to set the base token URI for the tokenURI.
     * @param $uri The URI to set as the base token URI.
     */
    function setBaseTokenURI(string memory $uri) public onlyOwner {
        baseTokenURI = $uri;
    }

    /**
     * @notice Allow the owner to set the renderer for the tokenURI.
     * @dev This function is only available to the owner and enables the ability
     *      to set the renderer for the tokenURI.
     * @param $renderer The address of the renderer to set.
     */
    function setRenderer(address $renderer) public onlyOwner {
        /// @dev Set the renderer for the tokenURI.
        renderer = PaletteRenderer($renderer);

        /// @dev Disconnect the Renderer from this contract.
        if (address(renderer) != address(0)) {
            renderer.disconnect();
        }
    }

    /**
     * @notice Allow the owner to set the minter for the airdrop.
     * @param $minter The address of the minter to set.
     */
    function setMinter(address $minter) public onlyOwner {
        /// @dev Make sure that trading status has not been locked.
        if(locked == true) revert LibPalette.TradingLocked();

        /// @dev Update the state of the minter for the airdrop.
        minter = $minter;
    }

    /**
     * @notice Allow the owner to set the trading status.
     * @param $trading The status to set the trading status to.
     */
    function setTrading(bool $trading) public onlyOwner {
        /// @dev Make sure that trading status has not been locked.
        if(locked == true) revert LibPalette.TradingLocked();

        /// @dev Update the state of trading for a specific user.
        trading = $trading;
    }

    /**
     * @notice Revoke access to the transfer control.
     * @param $locked The status to set the locked status to.
     */
    function setLocked(bool $locked) public onlyOwner {
        /// @dev Make sure that trading status has not been locked.
        if(locked == true) revert LibPalette.TradingLocked();

        /// @dev Update the state of trading for a specific user.
        locked = $locked;
    }

    /**
     * @notice Allow the owner to withdraw the contract balance.
     */
    function withdraw() public onlyOwner {
        SafeTransferLib.safeTransferETH(owner(), address(this).balance);
    }

    /**
     * @notice ERC721 metadata for tokenURI to return image.
     * @param $id The id of the token to return the image for.
     * @return $uri The URI of the token to return the image for.
     */
    function tokenURI(
        uint256 $id
    ) public view override returns (string memory) {
        /// @dev Make sure the token has an owner (ie: it exists).
        if (_getOwnerOf($id) == address(0)) revert LibPalette.TokenInvalid();

        /// @dev The token ID without the encoding shift.
        uint256 tokenId = $id - (1 << 255);

        /// @dev If the renderer has been initialized, use the renderer.
        if (address(renderer) != address(0)) {
            return renderer.render($id);
        }

        /// @dev If the static metadata has not yet been initialized, use the prereveal.
        bytes memory uriBytes = bytes(baseTokenURI);
        uint256 length = uriBytes.length;
        if (length > 0 && uriBytes[length - 1] != 0x2F) {
            return baseTokenURI;
        }

        /// @dev When the renderer has not yet been initialized, use the static.
        return string.concat(baseTokenURI, tokenId.toString());
    }

    /**
     * @notice ERC20 trading prevention until the time is ready.
     * @param $from The address to transfer from.
     * @param $to The address to transfer to.
     * @param $value The amount to transfer.
     */
    function _transferERC20(
        address $from,
        address $to,
        uint256 $value
    ) internal override onlyTrading($from) {
        super._transferERC20($from, $to, $value);
    }

    /**
     * @notice ERC721 trading prevention until the time is ready.
     * @dev Realistically this should never be hit, but it is here just
     *      to handle edge-cases where the ERC721 is being transferred
     *      before the ERC20 is ready to be traded.
     * @param $from The address to transfer from.
     * @param $to The address to transfer to.
     * @param $id The id to transfer.
     */
    function _transferERC721(
        address $from,
        address $to,
        uint256 $id
    ) internal override onlyTrading($from) {
        super._transferERC721($from, $to, $id);
    }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {IERC721Receiver} from "@openzeppelin/contracts/interfaces/IERC721Receiver.sol";
import {IERC165} from "@openzeppelin/contracts/interfaces/IERC165.sol";
import {IERC404} from "./interfaces/IERC404.sol";
import {DoubleEndedQueue} from "./lib/DoubleEndedQueue.sol";
import {ERC721Events} from "./lib/ERC721Events.sol";
import {ERC20Events} from "./lib/ERC20Events.sol";

abstract contract ERC404 is IERC404 {
    using DoubleEndedQueue for DoubleEndedQueue.Uint256Deque;

    /// @dev The queue of ERC-721 tokens stored in the contract.
    DoubleEndedQueue.Uint256Deque private _storedERC721Ids;

    /// @dev Token name
    string public name;

    /// @dev Token symbol
    string public symbol;

    /// @dev Decimals for ERC-20 representation
    uint8 public immutable decimals;

    /// @dev Units for ERC-20 representation
    uint256 public immutable units;

    /// @dev Total supply in ERC-20 representation
    uint256 public totalSupply;

    /// @dev Current mint counter which also represents the highest
    ///      minted id, monotonically increasing to ensure accurate ownership
    uint256 public minted;

    /// @dev Initial chain id for EIP-2612 support
    uint256 internal immutable _INITIAL_CHAIN_ID;

    /// @dev Initial domain separator for EIP-2612 support
    bytes32 internal immutable _INITIAL_DOMAIN_SEPARATOR;

    /// @dev Balance of user in ERC-20 representation
    mapping(address => uint256) public balanceOf;

    /// @dev Allowance of user in ERC-20 representation
    mapping(address => mapping(address => uint256)) public allowance;

    /// @dev Approval in ERC-721 representaion
    mapping(uint256 => address) public getApproved;

    /// @dev Approval for all in ERC-721 representation
    mapping(address => mapping(address => bool)) public isApprovedForAll;

    /// @dev Packed representation of ownerOf and owned indices
    mapping(uint256 => uint256) internal _ownedData;

    /// @dev Array of owned ids in ERC-721 representation
    mapping(address => uint256[]) internal _owned;

    /// @dev Addresses that are exempt from ERC-721 transfer, typically for gas savings (pairs, routers, etc)
    mapping(address => bool) internal _erc721TransferExempt;

    /// @dev EIP-2612 nonces
    mapping(address => uint256) public nonces;

    /// @dev Address bitmask for packed ownership data
    uint256 private constant _BITMASK_ADDRESS = (1 << 160) - 1;

    /// @dev Owned index bitmask for packed ownership data
    uint256 private constant _BITMASK_OWNED_INDEX = ((1 << 96) - 1) << 160;

    /// @dev Constant for token id encoding
    uint256 public constant ID_ENCODING_PREFIX = 1 << 255;

    constructor(string memory name_, string memory symbol_, uint8 decimals_) {
        name = name_;
        symbol = symbol_;

        if (decimals_ < 18) {
            revert DecimalsTooLow();
        }

        decimals = decimals_;
        units = 10 ** decimals;

        // EIP-2612 initialization
        _INITIAL_CHAIN_ID = block.chainid;
        _INITIAL_DOMAIN_SEPARATOR = _computeDomainSeparator();
    }

    /// @notice Function to find owner of a given ERC-721 token
    function ownerOf(
        uint256 id_
    ) public view virtual returns (address erc721Owner) {
        erc721Owner = _getOwnerOf(id_);

        if (!_isValidTokenId(id_)) {
            revert InvalidTokenId();
        }

        if (erc721Owner == address(0)) {
            revert NotFound();
        }
    }

    function owned(
        address owner_
    ) public view virtual returns (uint256[] memory) {
        return _owned[owner_];
    }

    function erc721BalanceOf(
        address owner_
    ) public view virtual returns (uint256) {
        return _owned[owner_].length;
    }

    function erc20BalanceOf(
        address owner_
    ) public view virtual returns (uint256) {
        return balanceOf[owner_];
    }

    function erc20TotalSupply() public view virtual returns (uint256) {
        return totalSupply;
    }

    function erc721TotalSupply() public view virtual returns (uint256) {
        return minted;
    }

    function getERC721QueueLength() public view virtual returns (uint256) {
        return _storedERC721Ids.length();
    }

    function getERC721TokensInQueue(
        uint256 start_,
        uint256 count_
    ) public view virtual returns (uint256[] memory) {
        uint256[] memory tokensInQueue = new uint256[](count_);

        for (uint256 i = start_; i < start_ + count_; ) {
            tokensInQueue[i - start_] = _storedERC721Ids.at(i);

            unchecked {
                ++i;
            }
        }

        return tokensInQueue;
    }

    /// @notice tokenURI must be implemented by child contract
    function tokenURI(uint256 id_) public view virtual returns (string memory);

    /// @notice Function for token approvals
    /// @dev This function assumes the operator is attempting to approve
    ///      an ERC-721 if valueOrId_ is a possibly valid ERC-721 token id.
    ///      Unlike setApprovalForAll, spender_ must be allowed to be 0x0 so
    ///      that approval can be revoked.
    function approve(
        address spender_,
        uint256 valueOrId_
    ) public virtual returns (bool) {
        if (_isValidTokenId(valueOrId_)) {
            erc721Approve(spender_, valueOrId_);
        } else {
            return erc20Approve(spender_, valueOrId_);
        }

        return true;
    }

    function erc721Approve(address spender_, uint256 id_) public virtual {
        // Intention is to approve as ERC-721 token (id).
        address erc721Owner = _getOwnerOf(id_);

        if (
            msg.sender != erc721Owner &&
            !isApprovedForAll[erc721Owner][msg.sender]
        ) {
            revert Unauthorized();
        }

        getApproved[id_] = spender_;

        emit ERC721Events.Approval(erc721Owner, spender_, id_);
    }

    /// @dev Providing type(uint256).max for approval value results in an
    ///      unlimited approval that is not deducted from on transfers.
    function erc20Approve(
        address spender_,
        uint256 value_
    ) public virtual returns (bool) {
        // Prevent granting 0x0 an ERC-20 allowance.
        if (spender_ == address(0)) {
            revert InvalidSpender();
        }

        allowance[msg.sender][spender_] = value_;

        emit ERC20Events.Approval(msg.sender, spender_, value_);

        return true;
    }

    /// @notice Function for ERC-721 approvals
    function setApprovalForAll(
        address operator_,
        bool approved_
    ) public virtual {
        // Prevent approvals to 0x0.
        if (operator_ == address(0)) {
            revert InvalidOperator();
        }
        isApprovedForAll[msg.sender][operator_] = approved_;
        emit ERC721Events.ApprovalForAll(msg.sender, operator_, approved_);
    }

    /// @notice Function for mixed transfers from an operator that may be different than 'from'.
    /// @dev This function assumes the operator is attempting to transfer an ERC-721
    ///      if valueOrId is a possible valid token id.
    function transferFrom(
        address from_,
        address to_,
        uint256 valueOrId_
    ) public virtual returns (bool) {
        if (_isValidTokenId(valueOrId_)) {
            erc721TransferFrom(from_, to_, valueOrId_);
        } else {
            // Intention is to transfer as ERC-20 token (value).
            return erc20TransferFrom(from_, to_, valueOrId_);
        }

        return true;
    }

    /// @notice Function for ERC-721 transfers from.
    /// @dev This function is recommended for ERC721 transfers.
    function erc721TransferFrom(
        address from_,
        address to_,
        uint256 id_
    ) public virtual {
        // Prevent minting tokens from 0x0.
        if (from_ == address(0)) {
            revert InvalidSender();
        }

        // Prevent burning tokens to 0x0.
        if (to_ == address(0)) {
            revert InvalidRecipient();
        }

        if (from_ != _getOwnerOf(id_)) {
            revert Unauthorized();
        }

        // Check that the operator is either the sender or approved for the transfer.
        if (
            msg.sender != from_ &&
            !isApprovedForAll[from_][msg.sender] &&
            msg.sender != getApproved[id_]
        ) {
            revert Unauthorized();
        }

        // We only need to check ERC-721 transfer exempt status for the recipient
        // since the sender being ERC-721 transfer exempt means they have already
        // had their ERC-721s stripped away during the rebalancing process.
        if (erc721TransferExempt(to_)) {
            revert RecipientIsERC721TransferExempt();
        }

        // Transfer 1 * units ERC-20 and 1 ERC-721 token.
        // ERC-721 transfer exemptions handled above. Can't make it to this point if either is transfer exempt.
        _transferERC20(from_, to_, units);
        _transferERC721(from_, to_, id_);
    }

    /// @notice Function for ERC-20 transfers from.
    /// @dev This function is recommended for ERC20 transfers
    function erc20TransferFrom(
        address from_,
        address to_,
        uint256 value_
    ) public virtual returns (bool) {
        // Prevent minting tokens from 0x0.
        if (from_ == address(0)) {
            revert InvalidSender();
        }

        // Prevent burning tokens to 0x0.
        if (to_ == address(0)) {
            revert InvalidRecipient();
        }

        uint256 allowed = allowance[from_][msg.sender];

        // Check that the operator has sufficient allowance.
        if (allowed != type(uint256).max) {
            allowance[from_][msg.sender] = allowed - value_;
        }

        // Transferring ERC-20s directly requires the _transferERC20WithERC721 function.
        // Handles ERC-721 exemptions internally.
        return _transferERC20WithERC721(from_, to_, value_);
    }

    /// @notice Function for ERC-20 transfers.
    /// @dev This function assumes the operator is attempting to transfer as ERC-20
    ///      given this function is only supported on the ERC-20 interface.
    ///      Treats even large amounts that are valid ERC-721 ids as ERC-20s.
    function transfer(
        address to_,
        uint256 value_
    ) public virtual returns (bool) {
        // Prevent burning tokens to 0x0.
        if (to_ == address(0)) {
            revert InvalidRecipient();
        }

        // Transferring ERC-20s directly requires the _transferERC20WithERC721 function.
        // Handles ERC-721 exemptions internally.
        return _transferERC20WithERC721(msg.sender, to_, value_);
    }

    /// @notice Function for ERC-721 transfers with contract support.
    /// This function only supports moving valid ERC-721 ids, as it does not exist on the ERC-20
    /// spec and will revert otherwise.
    function safeTransferFrom(
        address from_,
        address to_,
        uint256 id_
    ) public virtual {
        safeTransferFrom(from_, to_, id_, "");
    }

    /// @notice Function for ERC-721 transfers with contract support and callback data.
    /// This function only supports moving valid ERC-721 ids, as it does not exist on the
    /// ERC-20 spec and will revert otherwise.
    function safeTransferFrom(
        address from_,
        address to_,
        uint256 id_,
        bytes memory data_
    ) public virtual {
        if (!_isValidTokenId(id_)) {
            revert InvalidTokenId();
        }

        transferFrom(from_, to_, id_);

        if (
            to_.code.length != 0 &&
            IERC721Receiver(to_).onERC721Received(
                msg.sender,
                from_,
                id_,
                data_
            ) !=
            IERC721Receiver.onERC721Received.selector
        ) {
            revert UnsafeRecipient();
        }
    }

    /// @notice Function for EIP-2612 permits (ERC-20 only).
    /// @dev Providing type(uint256).max for permit value results in an
    ///      unlimited approval that is not deducted from on transfers.
    function permit(
        address owner_,
        address spender_,
        uint256 value_,
        uint256 deadline_,
        uint8 v_,
        bytes32 r_,
        bytes32 s_
    ) public virtual {
        if (deadline_ < block.timestamp) {
            revert PermitDeadlineExpired();
        }

        // permit cannot be used for ERC-721 token approvals, so ensure
        // the value does not fall within the valid range of ERC-721 token ids.
        if (_isValidTokenId(value_)) {
            revert InvalidApproval();
        }

        if (spender_ == address(0)) {
            revert InvalidSpender();
        }

        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner_,
                                spender_,
                                value_,
                                nonces[owner_]++,
                                deadline_
                            )
                        )
                    )
                ),
                v_,
                r_,
                s_
            );

            if (recoveredAddress == address(0) || recoveredAddress != owner_) {
                revert InvalidSigner();
            }

            allowance[recoveredAddress][spender_] = value_;
        }

        emit ERC20Events.Approval(owner_, spender_, value_);
    }

    /// @notice Returns domain initial domain separator, or recomputes if chain id is not equal to initial chain id
    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return
            block.chainid == _INITIAL_CHAIN_ID
                ? _INITIAL_DOMAIN_SEPARATOR
                : _computeDomainSeparator();
    }

    function supportsInterface(
        bytes4 interfaceId
    ) public view virtual returns (bool) {
        return
            interfaceId == type(IERC404).interfaceId ||
            interfaceId == type(IERC165).interfaceId;
    }

    /// @notice Function for self-exemption
    function setSelfERC721TransferExempt(bool state_) public virtual {
        _setERC721TransferExempt(msg.sender, state_);
    }

    /// @notice Function to check if address is transfer exempt
    function erc721TransferExempt(
        address target_
    ) public view virtual returns (bool) {
        return target_ == address(0) || _erc721TransferExempt[target_];
    }

    /// @notice For a token token id to be considered valid, it just needs
    ///         to fall within the range of possible token ids, it does not
    ///         necessarily have to be minted yet.
    function _isValidTokenId(uint256 id_) internal pure returns (bool) {
        return id_ > ID_ENCODING_PREFIX && id_ != type(uint256).max;
    }

    /// @notice Internal function to compute domain separator for EIP-2612 permits
    function _computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256(
                        "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
                    ),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /// @notice This is the lowest level ERC-20 transfer function, which
    ///         should be used for both normal ERC-20 transfers as well as minting.
    /// Note that this function allows transfers to and from 0x0.
    function _transferERC20(
        address from_,
        address to_,
        uint256 value_
    ) internal virtual {
        // Minting is a special case for which we should not check the balance of
        // the sender, and we should increase the total supply.
        if (from_ == address(0)) {
            totalSupply += value_;
        } else {
            // Deduct value from sender's balance.
            balanceOf[from_] -= value_;
        }

        // Update the recipient's balance.
        // Can be unchecked because on mint, adding to totalSupply is checked, and on transfer balance deduction is checked.
        unchecked {
            balanceOf[to_] += value_;
        }

        emit ERC20Events.Transfer(from_, to_, value_);
    }

    /// @notice Consolidated record keeping function for transferring ERC-721s.
    /// @dev Assign the token to the new owner, and remove from the old owner.
    /// Note that this function allows transfers to and from 0x0.
    /// Does not handle ERC-721 exemptions.
    function _transferERC721(
        address from_,
        address to_,
        uint256 id_
    ) internal virtual {
        // If this is not a mint, handle record keeping for transfer from previous owner.
        if (from_ != address(0)) {
            // On transfer of an NFT, any previous approval is reset.
            delete getApproved[id_];

            uint256 updatedId = _owned[from_][_owned[from_].length - 1];
            if (updatedId != id_) {
                uint256 updatedIndex = _getOwnedIndex(id_);
                // update _owned for sender
                _owned[from_][updatedIndex] = updatedId;
                // update index for the moved id
                _setOwnedIndex(updatedId, updatedIndex);
            }

            // pop
            _owned[from_].pop();
        }

        // Check if this is a burn.
        if (to_ != address(0)) {
            // If not a burn, update the owner of the token to the new owner.
            // Update owner of the token to the new owner.
            _setOwnerOf(id_, to_);
            // Push token onto the new owner's stack.
            _owned[to_].push(id_);
            // Update index for new owner's stack.
            _setOwnedIndex(id_, _owned[to_].length - 1);
        } else {
            // If this is a burn, reset the owner of the token to 0x0 by deleting the token from _ownedData.
            delete _ownedData[id_];
        }

        emit ERC721Events.Transfer(from_, to_, id_);
    }

    /// @notice Internal function for ERC-20 transfers. Also handles any ERC-721 transfers that may be required.
    // Handles ERC-721 exemptions.
    function _transferERC20WithERC721(
        address from_,
        address to_,
        uint256 value_
    ) internal virtual returns (bool) {
        uint256 erc20BalanceOfSenderBefore = erc20BalanceOf(from_);
        uint256 erc20BalanceOfReceiverBefore = erc20BalanceOf(to_);

        _transferERC20(from_, to_, value_);

        // Preload for gas savings on branches
        bool isFromERC721TransferExempt = erc721TransferExempt(from_);
        bool isToERC721TransferExempt = erc721TransferExempt(to_);

        // Skip _withdrawAndStoreERC721 and/or _retrieveOrMintERC721 for ERC-721 transfer exempt addresses
        // 1) to save gas
        // 2) because ERC-721 transfer exempt addresses won't always have/need ERC-721s corresponding to their ERC20s.
        if (isFromERC721TransferExempt && isToERC721TransferExempt) {
            // Case 1) Both sender and recipient are ERC-721 transfer exempt. No ERC-721s need to be transferred.
            // NOOP.
        } else if (isFromERC721TransferExempt) {
            // Case 2) The sender is ERC-721 transfer exempt, but the recipient is not. Contract should not attempt
            //         to transfer ERC-721s from the sender, but the recipient should receive ERC-721s
            //         from the bank/minted for any whole number increase in their balance.
            // Only cares about whole number increments.
            uint256 tokensToRetrieveOrMint = (balanceOf[to_] / units) -
                (erc20BalanceOfReceiverBefore / units);
            for (uint256 i = 0; i < tokensToRetrieveOrMint; ) {
                _retrieveOrMintERC721(to_);
                unchecked {
                    ++i;
                }
            }
        } else if (isToERC721TransferExempt) {
            // Case 3) The sender is not ERC-721 transfer exempt, but the recipient is. Contract should attempt
            //         to withdraw and store ERC-721s from the sender, but the recipient should not
            //         receive ERC-721s from the bank/minted.
            // Only cares about whole number increments.
            uint256 tokensToWithdrawAndStore = (erc20BalanceOfSenderBefore /
                units) - (balanceOf[from_] / units);
            for (uint256 i = 0; i < tokensToWithdrawAndStore; ) {
                _withdrawAndStoreERC721(from_);
                unchecked {
                    ++i;
                }
            }
        } else {
            // Case 4) Neither the sender nor the recipient are ERC-721 transfer exempt.
            // Strategy:
            // 1. First deal with the whole tokens. These are easy and will just be transferred.
            // 2. Look at the fractional part of the value:
            //   a) If it causes the sender to lose a whole token that was represented by an NFT due to a
            //      fractional part being transferred, withdraw and store an additional NFT from the sender.
            //   b) If it causes the receiver to gain a whole new token that should be represented by an NFT
            //      due to receiving a fractional part that completes a whole token, retrieve or mint an NFT to the recevier.

            // Whole tokens worth of ERC-20s get transferred as ERC-721s without any burning/minting.
            uint256 nftsToTransfer = value_ / units;
            for (uint256 i = 0; i < nftsToTransfer; ) {
                // Pop from sender's ERC-721 stack and transfer them (LIFO)
                uint256 indexOfLastToken = _owned[from_].length - 1;
                uint256 tokenId = _owned[from_][indexOfLastToken];
                _transferERC721(from_, to_, tokenId);
                unchecked {
                    ++i;
                }
            }

            // If the transfer changes either the sender or the recipient's holdings from a fractional to a non-fractional
            // amount (or vice versa), adjust ERC-721s.

            // First check if the send causes the sender to lose a whole token that was represented by an ERC-721
            // due to a fractional part being transferred.
            //
            // Process:
            // Take the difference between the whole number of tokens before and after the transfer for the sender.
            // If that difference is greater than the number of ERC-721s transferred (whole units), then there was
            // an additional ERC-721 lost due to the fractional portion of the transfer.
            // If this is a self-send and the before and after balances are equal (not always the case but often),
            // then no ERC-721s will be lost here.
            if (
                erc20BalanceOfSenderBefore /
                    units -
                    erc20BalanceOf(from_) /
                    units >
                nftsToTransfer
            ) {
                _withdrawAndStoreERC721(from_);
            }

            // Then, check if the transfer causes the receiver to gain a whole new token which requires gaining
            // an additional ERC-721.
            //
            // Process:
            // Take the difference between the whole number of tokens before and after the transfer for the recipient.
            // If that difference is greater than the number of ERC-721s transferred (whole units), then there was
            // an additional ERC-721 gained due to the fractional portion of the transfer.
            // Again, for self-sends where the before and after balances are equal, no ERC-721s will be gained here.
            if (
                erc20BalanceOf(to_) /
                    units -
                    erc20BalanceOfReceiverBefore /
                    units >
                nftsToTransfer
            ) {
                _retrieveOrMintERC721(to_);
            }
        }

        return true;
    }

    /// @notice Internal function for ERC20 minting
    /// @dev This function will allow minting of new ERC20s.
    ///      If mintCorrespondingERC721s_ is true, and the recipient is not ERC-721 exempt, it will
    ///      also mint the corresponding ERC721s.
    /// Handles ERC-721 exemptions.
    function _mintERC20(address to_, uint256 value_) internal virtual {
        /// You cannot mint to the zero address (you can't mint and immediately burn in the same transfer).
        if (to_ == address(0)) {
            revert InvalidRecipient();
        }

        if (totalSupply + value_ > ID_ENCODING_PREFIX) {
            revert MintLimitReached();
        }

        _transferERC20WithERC721(address(0), to_, value_);
    }

    /// @notice Internal function for ERC-721 minting and retrieval from the bank.
    /// @dev This function will allow minting of new ERC-721s up to the total fractional supply. It will
    ///      first try to pull from the bank, and if the bank is empty, it will mint a new token.
    /// Does not handle ERC-721 exemptions.
    function _retrieveOrMintERC721(address to_) internal virtual {
        if (to_ == address(0)) {
            revert InvalidRecipient();
        }

        uint256 id;

        if (!_storedERC721Ids.empty()) {
            // If there are any tokens in the bank, use those first.
            // Pop off the end of the queue (FIFO).
            id = _storedERC721Ids.popBack();
        } else {
            // Otherwise, mint a new token, should not be able to go over the total fractional supply.
            ++minted;

            // Reserve max uint256 for approvals
            if (minted == type(uint256).max) {
                revert MintLimitReached();
            }

            id = ID_ENCODING_PREFIX + minted;
        }

        address erc721Owner = _getOwnerOf(id);

        // The token should not already belong to anyone besides 0x0 or this contract.
        // If it does, something is wrong, as this should never happen.
        if (erc721Owner != address(0)) {
            revert AlreadyExists();
        }

        // Transfer the token to the recipient, either transferring from the contract's bank or minting.
        // Does not handle ERC-721 exemptions.
        _transferERC721(erc721Owner, to_, id);
    }

    /// @notice Internal function for ERC-721 deposits to bank (this contract).
    /// @dev This function will allow depositing of ERC-721s to the bank, which can be retrieved by future minters.
    // Does not handle ERC-721 exemptions.
    function _withdrawAndStoreERC721(address from_) internal virtual {
        if (from_ == address(0)) {
            revert InvalidSender();
        }

        // Retrieve the latest token added to the owner's stack (LIFO).
        uint256 id = _owned[from_][_owned[from_].length - 1];

        // Transfer to 0x0.
        // Does not handle ERC-721 exemptions.
        _transferERC721(from_, address(0), id);

        // Record the token in the contract's bank queue.
        _storedERC721Ids.pushFront(id);
    }

    /// @notice Initialization function to set pairs / etc, saving gas by avoiding mint / burn on unnecessary targets
    function _setERC721TransferExempt(
        address target_,
        bool state_
    ) internal virtual {
        if (target_ == address(0)) {
            revert InvalidExemption();
        }

        // Adjust the ERC721 balances of the target to respect exemption rules.
        // Despite this logic, it is still recommended practice to exempt prior to the target
        // having an active balance.
        if (state_) {
            _clearERC721Balance(target_);
        } else {
            _reinstateERC721Balance(target_);
        }

        _erc721TransferExempt[target_] = state_;
    }

    /// @notice Function to reinstate balance on exemption removal
    function _reinstateERC721Balance(address target_) private {
        uint256 expectedERC721Balance = erc20BalanceOf(target_) / units;
        uint256 actualERC721Balance = erc721BalanceOf(target_);

        for (uint256 i = 0; i < expectedERC721Balance - actualERC721Balance; ) {
            // Transfer ERC721 balance in from pool
            _retrieveOrMintERC721(target_);
            unchecked {
                ++i;
            }
        }
    }

    /// @notice Function to clear balance on exemption inclusion
    function _clearERC721Balance(address target_) private {
        uint256 erc721Balance = erc721BalanceOf(target_);

        for (uint256 i = 0; i < erc721Balance; ) {
            // Transfer out ERC721 balance
            _withdrawAndStoreERC721(target_);
            unchecked {
                ++i;
            }
        }
    }

    function _getOwnerOf(
        uint256 id_
    ) internal view virtual returns (address ownerOf_) {
        uint256 data = _ownedData[id_];

        assembly {
            ownerOf_ := and(data, _BITMASK_ADDRESS)
        }
    }

    function _setOwnerOf(uint256 id_, address owner_) internal virtual {
        uint256 data = _ownedData[id_];

        assembly {
            data := add(
                and(data, _BITMASK_OWNED_INDEX),
                and(owner_, _BITMASK_ADDRESS)
            )
        }

        _ownedData[id_] = data;
    }

    function _getOwnedIndex(
        uint256 id_
    ) internal view virtual returns (uint256 ownedIndex_) {
        uint256 data = _ownedData[id_];

        assembly {
            ownedIndex_ := shr(160, data)
        }
    }

    function _setOwnedIndex(uint256 id_, uint256 index_) internal virtual {
        uint256 data = _ownedData[id_];

        if (index_ > _BITMASK_OWNED_INDEX >> 160) {
            revert OwnedIndexOverflow();
        }

        assembly {
            data := add(
                and(data, _BITMASK_ADDRESS),
                and(shl(160, index_), _BITMASK_OWNED_INDEX)
            )
        }

        _ownedData[id_] = data;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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

pragma solidity 0.8.23;

library LibPalette {
    /// @dev Object defintion of a airdrop phase.
    struct Phase {
        bytes32 merkleRoot;
        uint32 startTime;
        uint32 endTime;
    }
    /// @dev The token does not exist.
    error TokenInvalid();
    /// @dev The token is not ready to be traded.
    error TokenLoading();
    /// @dev An invalid minter is attempting to mint.
    error MintInvalid();
    /// @dev An invalid minter is attempting to mint.
    error MinterInvalid();
    /// @dev Transfer state has been locked already.
    error TradingLocked();
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Gas optimized verification of proof of inclusion for a leaf in a Merkle tree.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/MerkleProofLib.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/MerkleProofLib.sol)
/// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/cryptography/MerkleProof.sol)
library MerkleProofLib {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*            MERKLE PROOF VERIFICATION OPERATIONS            */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns whether `leaf` exists in the Merkle tree with `root`, given `proof`.
    function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf)
        internal
        pure
        returns (bool isValid)
    {
        /// @solidity memory-safe-assembly
        assembly {
            if mload(proof) {
                // Initialize `offset` to the offset of `proof` elements in memory.
                let offset := add(proof, 0x20)
                // Left shift by 5 is equivalent to multiplying by 0x20.
                let end := add(offset, shl(5, mload(proof)))
                // Iterate over proof elements to compute root hash.
                for {} 1 {} {
                    // Slot of `leaf` in scratch space.
                    // If the condition is true: 0x20, otherwise: 0x00.
                    let scratch := shl(5, gt(leaf, mload(offset)))
                    // Store elements to hash contiguously in scratch space.
                    // Scratch space is 64 bytes (0x00 - 0x3f) and both elements are 32 bytes.
                    mstore(scratch, leaf)
                    mstore(xor(scratch, 0x20), mload(offset))
                    // Reuse `leaf` to store the hash to reduce stack operations.
                    leaf := keccak256(0x00, 0x40)
                    offset := add(offset, 0x20)
                    if iszero(lt(offset, end)) { break }
                }
            }
            isValid := eq(leaf, root)
        }
    }

    /// @dev Returns whether `leaf` exists in the Merkle tree with `root`, given `proof`.
    function verifyCalldata(bytes32[] calldata proof, bytes32 root, bytes32 leaf)
        internal
        pure
        returns (bool isValid)
    {
        /// @solidity memory-safe-assembly
        assembly {
            if proof.length {
                // Left shift by 5 is equivalent to multiplying by 0x20.
                let end := add(proof.offset, shl(5, proof.length))
                // Initialize `offset` to the offset of `proof` in the calldata.
                let offset := proof.offset
                // Iterate over proof elements to compute root hash.
                for {} 1 {} {
                    // Slot of `leaf` in scratch space.
                    // If the condition is true: 0x20, otherwise: 0x00.
                    let scratch := shl(5, gt(leaf, calldataload(offset)))
                    // Store elements to hash contiguously in scratch space.
                    // Scratch space is 64 bytes (0x00 - 0x3f) and both elements are 32 bytes.
                    mstore(scratch, leaf)
                    mstore(xor(scratch, 0x20), calldataload(offset))
                    // Reuse `leaf` to store the hash to reduce stack operations.
                    leaf := keccak256(0x00, 0x40)
                    offset := add(offset, 0x20)
                    if iszero(lt(offset, end)) { break }
                }
            }
            isValid := eq(leaf, root)
        }
    }

    /// @dev Returns whether all `leaves` exist in the Merkle tree with `root`,
    /// given `proof` and `flags`.
    ///
    /// Note:
    /// - Breaking the invariant `flags.length == (leaves.length - 1) + proof.length`
    ///   will always return false.
    /// - The sum of the lengths of `proof` and `leaves` must never overflow.
    /// - Any non-zero word in the `flags` array is treated as true.
    /// - The memory offset of `proof` must be non-zero
    ///   (i.e. `proof` is not pointing to the scratch space).
    function verifyMultiProof(
        bytes32[] memory proof,
        bytes32 root,
        bytes32[] memory leaves,
        bool[] memory flags
    ) internal pure returns (bool isValid) {
        // Rebuilds the root by consuming and producing values on a queue.
        // The queue starts with the `leaves` array, and goes into a `hashes` array.
        // After the process, the last element on the queue is verified
        // to be equal to the `root`.
        //
        // The `flags` array denotes whether the sibling
        // should be popped from the queue (`flag == true`), or
        // should be popped from the `proof` (`flag == false`).
        /// @solidity memory-safe-assembly
        assembly {
            // Cache the lengths of the arrays.
            let leavesLength := mload(leaves)
            let proofLength := mload(proof)
            let flagsLength := mload(flags)

            // Advance the pointers of the arrays to point to the data.
            leaves := add(0x20, leaves)
            proof := add(0x20, proof)
            flags := add(0x20, flags)

            // If the number of flags is correct.
            for {} eq(add(leavesLength, proofLength), add(flagsLength, 1)) {} {
                // For the case where `proof.length + leaves.length == 1`.
                if iszero(flagsLength) {
                    // `isValid = (proof.length == 1 ? proof[0] : leaves[0]) == root`.
                    isValid := eq(mload(xor(leaves, mul(xor(proof, leaves), proofLength))), root)
                    break
                }

                // The required final proof offset if `flagsLength` is not zero, otherwise zero.
                let proofEnd := add(proof, shl(5, proofLength))
                // We can use the free memory space for the queue.
                // We don't need to allocate, since the queue is temporary.
                let hashesFront := mload(0x40)
                // Copy the leaves into the hashes.
                // Sometimes, a little memory expansion costs less than branching.
                // Should cost less, even with a high free memory offset of 0x7d00.
                leavesLength := shl(5, leavesLength)
                for { let i := 0 } iszero(eq(i, leavesLength)) { i := add(i, 0x20) } {
                    mstore(add(hashesFront, i), mload(add(leaves, i)))
                }
                // Compute the back of the hashes.
                let hashesBack := add(hashesFront, leavesLength)
                // This is the end of the memory for the queue.
                // We recycle `flagsLength` to save on stack variables (sometimes save gas).
                flagsLength := add(hashesBack, shl(5, flagsLength))

                for {} 1 {} {
                    // Pop from `hashes`.
                    let a := mload(hashesFront)
                    // Pop from `hashes`.
                    let b := mload(add(hashesFront, 0x20))
                    hashesFront := add(hashesFront, 0x40)

                    // If the flag is false, load the next proof,
                    // else, pops from the queue.
                    if iszero(mload(flags)) {
                        // Loads the next proof.
                        b := mload(proof)
                        proof := add(proof, 0x20)
                        // Unpop from `hashes`.
                        hashesFront := sub(hashesFront, 0x20)
                    }

                    // Advance to the next flag.
                    flags := add(flags, 0x20)

                    // Slot of `a` in scratch space.
                    // If the condition is true: 0x20, otherwise: 0x00.
                    let scratch := shl(5, gt(a, b))
                    // Hash the scratch space and push the result onto the queue.
                    mstore(scratch, a)
                    mstore(xor(scratch, 0x20), b)
                    mstore(hashesBack, keccak256(0x00, 0x40))
                    hashesBack := add(hashesBack, 0x20)
                    if iszero(lt(hashesBack, flagsLength)) { break }
                }
                isValid :=
                    and(
                        // Checks if the last value in the queue is same as the root.
                        eq(mload(sub(hashesBack, 0x20)), root),
                        // And whether all the proofs are used, if required.
                        eq(proofEnd, proof)
                    )
                break
            }
        }
    }

    /// @dev Returns whether all `leaves` exist in the Merkle tree with `root`,
    /// given `proof` and `flags`.
    ///
    /// Note:
    /// - Breaking the invariant `flags.length == (leaves.length - 1) + proof.length`
    ///   will always return false.
    /// - Any non-zero word in the `flags` array is treated as true.
    /// - The calldata offset of `proof` must be non-zero
    ///   (i.e. `proof` is from a regular Solidity function with a 4-byte selector).
    function verifyMultiProofCalldata(
        bytes32[] calldata proof,
        bytes32 root,
        bytes32[] calldata leaves,
        bool[] calldata flags
    ) internal pure returns (bool isValid) {
        // Rebuilds the root by consuming and producing values on a queue.
        // The queue starts with the `leaves` array, and goes into a `hashes` array.
        // After the process, the last element on the queue is verified
        // to be equal to the `root`.
        //
        // The `flags` array denotes whether the sibling
        // should be popped from the queue (`flag == true`), or
        // should be popped from the `proof` (`flag == false`).
        /// @solidity memory-safe-assembly
        assembly {
            // If the number of flags is correct.
            for {} eq(add(leaves.length, proof.length), add(flags.length, 1)) {} {
                // For the case where `proof.length + leaves.length == 1`.
                if iszero(flags.length) {
                    // `isValid = (proof.length == 1 ? proof[0] : leaves[0]) == root`.
                    // forgefmt: disable-next-item
                    isValid := eq(
                        calldataload(
                            xor(leaves.offset, mul(xor(proof.offset, leaves.offset), proof.length))
                        ),
                        root
                    )
                    break
                }

                // The required final proof offset if `flagsLength` is not zero, otherwise zero.
                let proofEnd := add(proof.offset, shl(5, proof.length))
                // We can use the free memory space for the queue.
                // We don't need to allocate, since the queue is temporary.
                let hashesFront := mload(0x40)
                // Copy the leaves into the hashes.
                // Sometimes, a little memory expansion costs less than branching.
                // Should cost less, even with a high free memory offset of 0x7d00.
                calldatacopy(hashesFront, leaves.offset, shl(5, leaves.length))
                // Compute the back of the hashes.
                let hashesBack := add(hashesFront, shl(5, leaves.length))
                // This is the end of the memory for the queue.
                // We recycle `flagsLength` to save on stack variables (sometimes save gas).
                flags.length := add(hashesBack, shl(5, flags.length))

                // We don't need to make a copy of `proof.offset` or `flags.offset`,
                // as they are pass-by-value (this trick may not always save gas).

                for {} 1 {} {
                    // Pop from `hashes`.
                    let a := mload(hashesFront)
                    // Pop from `hashes`.
                    let b := mload(add(hashesFront, 0x20))
                    hashesFront := add(hashesFront, 0x40)

                    // If the flag is false, load the next proof,
                    // else, pops from the queue.
                    if iszero(calldataload(flags.offset)) {
                        // Loads the next proof.
                        b := calldataload(proof.offset)
                        proof.offset := add(proof.offset, 0x20)
                        // Unpop from `hashes`.
                        hashesFront := sub(hashesFront, 0x20)
                    }

                    // Advance to the next flag offset.
                    flags.offset := add(flags.offset, 0x20)

                    // Slot of `a` in scratch space.
                    // If the condition is true: 0x20, otherwise: 0x00.
                    let scratch := shl(5, gt(a, b))
                    // Hash the scratch space and push the result onto the queue.
                    mstore(scratch, a)
                    mstore(xor(scratch, 0x20), b)
                    mstore(hashesBack, keccak256(0x00, 0x40))
                    hashesBack := add(hashesBack, 0x20)
                    if iszero(lt(hashesBack, flags.length)) { break }
                }
                isValid :=
                    and(
                        // Checks if the last value in the queue is same as the root.
                        eq(mload(sub(hashesBack, 0x20)), root),
                        // And whether all the proofs are used, if required.
                        eq(proofEnd, proof.offset)
                    )
                break
            }
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                   EMPTY CALLDATA HELPERS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns an empty calldata bytes32 array.
    function emptyProof() internal pure returns (bytes32[] calldata proof) {
        /// @solidity memory-safe-assembly
        assembly {
            proof.length := 0
        }
    }

    /// @dev Returns an empty calldata bytes32 array.
    function emptyLeaves() internal pure returns (bytes32[] calldata leaves) {
        /// @solidity memory-safe-assembly
        assembly {
            leaves.length := 0
        }
    }

    /// @dev Returns an empty calldata bool array.
    function emptyFlags() internal pure returns (bool[] calldata flags) {
        /// @solidity memory-safe-assembly
        assembly {
            flags.length := 0
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/SafeTransferLib.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
///
/// @dev Note:
/// - For ETH transfers, please use `forceSafeTransferETH` for DoS protection.
/// - For ERC20s, this implementation won't check that a token has code,
///   responsibility is delegated to the caller.
library SafeTransferLib {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       CUSTOM ERRORS                        */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The ETH transfer has failed.
    error ETHTransferFailed();

    /// @dev The ERC20 `transferFrom` has failed.
    error TransferFromFailed();

    /// @dev The ERC20 `transfer` has failed.
    error TransferFailed();

    /// @dev The ERC20 `approve` has failed.
    error ApproveFailed();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         CONSTANTS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Suggested gas stipend for contract receiving ETH that disallows any storage writes.
    uint256 internal constant GAS_STIPEND_NO_STORAGE_WRITES = 2300;

    /// @dev Suggested gas stipend for contract receiving ETH to perform a few
    /// storage reads and writes, but low enough to prevent griefing.
    uint256 internal constant GAS_STIPEND_NO_GRIEF = 100000;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       ETH OPERATIONS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    // If the ETH transfer MUST succeed with a reasonable gas budget, use the force variants.
    //
    // The regular variants:
    // - Forwards all remaining gas to the target.
    // - Reverts if the target reverts.
    // - Reverts if the current contract has insufficient balance.
    //
    // The force variants:
    // - Forwards with an optional gas stipend
    //   (defaults to `GAS_STIPEND_NO_GRIEF`, which is sufficient for most cases).
    // - If the target reverts, or if the gas stipend is exhausted,
    //   creates a temporary contract to force send the ETH via `SELFDESTRUCT`.
    //   Future compatible with `SENDALL`: https://eips.ethereum.org/EIPS/eip-4758.
    // - Reverts if the current contract has insufficient balance.
    //
    // The try variants:
    // - Forwards with a mandatory gas stipend.
    // - Instead of reverting, returns whether the transfer succeeded.

    /// @dev Sends `amount` (in wei) ETH to `to`.
    function safeTransferETH(address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if iszero(call(gas(), to, amount, codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Sends all the ETH in the current contract to `to`.
    function safeTransferAllETH(address to) internal {
        /// @solidity memory-safe-assembly
        assembly {
            // Transfer all the ETH and check if it succeeded or not.
            if iszero(call(gas(), to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Force sends `amount` (in wei) ETH to `to`, with a `gasStipend`.
    function forceSafeTransferETH(address to, uint256 amount, uint256 gasStipend) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if lt(selfbalance(), amount) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
            if iszero(call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Force sends all the ETH in the current contract to `to`, with a `gasStipend`.
    function forceSafeTransferAllETH(address to, uint256 gasStipend) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if iszero(call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Force sends `amount` (in wei) ETH to `to`, with `GAS_STIPEND_NO_GRIEF`.
    function forceSafeTransferETH(address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if lt(selfbalance(), amount) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
            if iszero(call(GAS_STIPEND_NO_GRIEF, to, amount, codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Force sends all the ETH in the current contract to `to`, with `GAS_STIPEND_NO_GRIEF`.
    function forceSafeTransferAllETH(address to) internal {
        /// @solidity memory-safe-assembly
        assembly {
            // forgefmt: disable-next-item
            if iszero(call(GAS_STIPEND_NO_GRIEF, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Sends `amount` (in wei) ETH to `to`, with a `gasStipend`.
    function trySafeTransferETH(address to, uint256 amount, uint256 gasStipend)
        internal
        returns (bool success)
    {
        /// @solidity memory-safe-assembly
        assembly {
            success := call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)
        }
    }

    /// @dev Sends all the ETH in the current contract to `to`, with a `gasStipend`.
    function trySafeTransferAllETH(address to, uint256 gasStipend)
        internal
        returns (bool success)
    {
        /// @solidity memory-safe-assembly
        assembly {
            success := call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      ERC20 OPERATIONS                      */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Sends `amount` of ERC20 `token` from `from` to `to`.
    /// Reverts upon failure.
    ///
    /// The `from` account must have at least `amount` approved for
    /// the current contract to manage.
    function safeTransferFrom(address token, address from, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x60, amount) // Store the `amount` argument.
            mstore(0x40, to) // Store the `to` argument.
            mstore(0x2c, shl(96, from)) // Store the `from` argument.
            mstore(0x0c, 0x23b872dd000000000000000000000000) // `transferFrom(address,address,uint256)`.
            // Perform the transfer, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
                )
            ) {
                mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x60, 0) // Restore the zero slot to zero.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }

    /// @dev Sends all of ERC20 `token` from `from` to `to`.
    /// Reverts upon failure.
    ///
    /// The `from` account must have their entire balance approved for
    /// the current contract to manage.
    function safeTransferAllFrom(address token, address from, address to)
        internal
        returns (uint256 amount)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x40, to) // Store the `to` argument.
            mstore(0x2c, shl(96, from)) // Store the `from` argument.
            mstore(0x0c, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
            // Read the balance, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    gt(returndatasize(), 0x1f), // At least 32 bytes returned.
                    staticcall(gas(), token, 0x1c, 0x24, 0x60, 0x20)
                )
            ) {
                mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x00, 0x23b872dd) // `transferFrom(address,address,uint256)`.
            amount := mload(0x60) // The `amount` is already at 0x60. We'll need to return it.
            // Perform the transfer, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
                )
            ) {
                mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x60, 0) // Restore the zero slot to zero.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }

    /// @dev Sends `amount` of ERC20 `token` from the current contract to `to`.
    /// Reverts upon failure.
    function safeTransfer(address token, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, to) // Store the `to` argument.
            mstore(0x34, amount) // Store the `amount` argument.
            mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`.
            // Perform the transfer, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                )
            ) {
                mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Sends all of ERC20 `token` from the current contract to `to`.
    /// Reverts upon failure.
    function safeTransferAll(address token, address to) internal returns (uint256 amount) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, 0x70a08231) // Store the function selector of `balanceOf(address)`.
            mstore(0x20, address()) // Store the address of the current contract.
            // Read the balance, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    gt(returndatasize(), 0x1f), // At least 32 bytes returned.
                    staticcall(gas(), token, 0x1c, 0x24, 0x34, 0x20)
                )
            ) {
                mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x14, to) // Store the `to` argument.
            amount := mload(0x34) // The `amount` is already at 0x34. We'll need to return it.
            mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`.
            // Perform the transfer, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                )
            ) {
                mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract.
    /// Reverts upon failure.
    function safeApprove(address token, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, to) // Store the `to` argument.
            mstore(0x34, amount) // Store the `amount` argument.
            mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
            // Perform the approval, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                )
            ) {
                mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract.
    /// If the initial attempt to approve fails, attempts to reset the approved amount to zero,
    /// then retries the approval again (some tokens, e.g. USDT, requires this).
    /// Reverts upon failure.
    function safeApproveWithRetry(address token, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, to) // Store the `to` argument.
            mstore(0x34, amount) // Store the `amount` argument.
            mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
            // Perform the approval, retrying upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                )
            ) {
                mstore(0x34, 0) // Store 0 for the `amount`.
                mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
                pop(call(gas(), token, 0, 0x10, 0x44, codesize(), 0x00)) // Reset the approval.
                mstore(0x34, amount) // Store back the original `amount`.
                // Retry the approval, reverting upon failure.
                if iszero(
                    and(
                        or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                        call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                    )
                ) {
                    mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`.
                    revert(0x1c, 0x04)
                }
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Returns the amount of ERC20 `token` owned by `account`.
    /// Returns zero if the `token` does not exist.
    function balanceOf(address token, address account) internal view returns (uint256 amount) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, account) // Store the `account` argument.
            mstore(0x00, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
            amount :=
                mul(
                    mload(0x20),
                    and( // The arguments of `and` are evaluated from right to left.
                        gt(returndatasize(), 0x1f), // At least 32 bytes returned.
                        staticcall(gas(), token, 0x10, 0x24, 0x20, 0x20)
                    )
                )
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Library for converting numbers into strings and other string operations.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/LibString.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/LibString.sol)
///
/// @dev Note:
/// For performance and bytecode compactness, most of the string operations are restricted to
/// byte strings (7-bit ASCII), except where otherwise specified.
/// Usage of byte string operations on charsets with runes spanning two or more bytes
/// can lead to undefined behavior.
library LibString {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                        CUSTOM ERRORS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The length of the output is too small to contain all the hex digits.
    error HexLengthInsufficient();

    /// @dev The length of the string is more than 32 bytes.
    error TooBigForSmallString();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         CONSTANTS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The constant returned when the `search` is not found in the string.
    uint256 internal constant NOT_FOUND = type(uint256).max;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     DECIMAL OPERATIONS                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the base 10 decimal representation of `value`.
    function toString(uint256 value) internal pure returns (string memory str) {
        /// @solidity memory-safe-assembly
        assembly {
            // The maximum value of a uint256 contains 78 digits (1 byte per digit), but
            // we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned.
            // We will need 1 word for the trailing zeros padding, 1 word for the length,
            // and 3 words for a maximum of 78 digits.
            str := add(mload(0x40), 0x80)
            // Update the free memory pointer to allocate.
            mstore(0x40, add(str, 0x20))
            // Zeroize the slot after the string.
            mstore(str, 0)

            // Cache the end of the memory to calculate the length later.
            let end := str

            let w := not(0) // Tsk.
            // We write the string from rightmost digit to leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            for { let temp := value } 1 {} {
                str := add(str, w) // `sub(str, 1)`.
                // Write the character to the pointer.
                // The ASCII index of the '0' character is 48.
                mstore8(str, add(48, mod(temp, 10)))
                // Keep dividing `temp` until zero.
                temp := div(temp, 10)
                if iszero(temp) { break }
            }

            let length := sub(end, str)
            // Move the pointer 32 bytes leftwards to make room for the length.
            str := sub(str, 0x20)
            // Store the length.
            mstore(str, length)
        }
    }

    /// @dev Returns the base 10 decimal representation of `value`.
    function toString(int256 value) internal pure returns (string memory str) {
        if (value >= 0) {
            return toString(uint256(value));
        }
        unchecked {
            str = toString(~uint256(value) + 1);
        }
        /// @solidity memory-safe-assembly
        assembly {
            // We still have some spare memory space on the left,
            // as we have allocated 3 words (96 bytes) for up to 78 digits.
            let length := mload(str) // Load the string length.
            mstore(str, 0x2d) // Store the '-' character.
            str := sub(str, 1) // Move back the string pointer by a byte.
            mstore(str, add(length, 1)) // Update the string length.
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                   HEXADECIMAL OPERATIONS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the hexadecimal representation of `value`,
    /// left-padded to an input length of `length` bytes.
    /// The output is prefixed with "0x" encoded using 2 hexadecimal digits per byte,
    /// giving a total length of `length * 2 + 2` bytes.
    /// Reverts if `length` is too small for the output to contain all the digits.
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory str) {
        str = toHexStringNoPrefix(value, length);
        /// @solidity memory-safe-assembly
        assembly {
            let strLength := add(mload(str), 2) // Compute the length.
            mstore(str, 0x3078) // Write the "0x" prefix.
            str := sub(str, 2) // Move the pointer.
            mstore(str, strLength) // Write the length.
        }
    }

    /// @dev Returns the hexadecimal representation of `value`,
    /// left-padded to an input length of `length` bytes.
    /// The output is prefixed with "0x" encoded using 2 hexadecimal digits per byte,
    /// giving a total length of `length * 2` bytes.
    /// Reverts if `length` is too small for the output to contain all the digits.
    function toHexStringNoPrefix(uint256 value, uint256 length)
        internal
        pure
        returns (string memory str)
    {
        /// @solidity memory-safe-assembly
        assembly {
            // We need 0x20 bytes for the trailing zeros padding, `length * 2` bytes
            // for the digits, 0x02 bytes for the prefix, and 0x20 bytes for the length.
            // We add 0x20 to the total and round down to a multiple of 0x20.
            // (0x20 + 0x20 + 0x02 + 0x20) = 0x62.
            str := add(mload(0x40), and(add(shl(1, length), 0x42), not(0x1f)))
            // Allocate the memory.
            mstore(0x40, add(str, 0x20))
            // Zeroize the slot after the string.
            mstore(str, 0)

            // Cache the end to calculate the length later.
            let end := str
            // Store "0123456789abcdef" in scratch space.
            mstore(0x0f, 0x30313233343536373839616263646566)

            let start := sub(str, add(length, length))
            let w := not(1) // Tsk.
            let temp := value
            // We write the string from rightmost digit to leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            for {} 1 {} {
                str := add(str, w) // `sub(str, 2)`.
                mstore8(add(str, 1), mload(and(temp, 15)))
                mstore8(str, mload(and(shr(4, temp), 15)))
                temp := shr(8, temp)
                if iszero(xor(str, start)) { break }
            }

            if temp {
                mstore(0x00, 0x2194895a) // `HexLengthInsufficient()`.
                revert(0x1c, 0x04)
            }

            // Compute the string's length.
            let strLength := sub(end, str)
            // Move the pointer and write the length.
            str := sub(str, 0x20)
            mstore(str, strLength)
        }
    }

    /// @dev Returns the hexadecimal representation of `value`.
    /// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte.
    /// As address are 20 bytes long, the output will left-padded to have
    /// a length of `20 * 2 + 2` bytes.
    function toHexString(uint256 value) internal pure returns (string memory str) {
        str = toHexStringNoPrefix(value);
        /// @solidity memory-safe-assembly
        assembly {
            let strLength := add(mload(str), 2) // Compute the length.
            mstore(str, 0x3078) // Write the "0x" prefix.
            str := sub(str, 2) // Move the pointer.
            mstore(str, strLength) // Write the length.
        }
    }

    /// @dev Returns the hexadecimal representation of `value`.
    /// The output is prefixed with "0x".
    /// The output excludes leading "0" from the `toHexString` output.
    /// `0x00: "0x0", 0x01: "0x1", 0x12: "0x12", 0x123: "0x123"`.
    function toMinimalHexString(uint256 value) internal pure returns (string memory str) {
        str = toHexStringNoPrefix(value);
        /// @solidity memory-safe-assembly
        assembly {
            let o := eq(byte(0, mload(add(str, 0x20))), 0x30) // Whether leading zero is present.
            let strLength := add(mload(str), 2) // Compute the length.
            mstore(add(str, o), 0x3078) // Write the "0x" prefix, accounting for leading zero.
            str := sub(add(str, o), 2) // Move the pointer, accounting for leading zero.
            mstore(str, sub(strLength, o)) // Write the length, accounting for leading zero.
        }
    }

    /// @dev Returns the hexadecimal representation of `value`.
    /// The output excludes leading "0" from the `toHexStringNoPrefix` output.
    /// `0x00: "0", 0x01: "1", 0x12: "12", 0x123: "123"`.
    function toMinimalHexStringNoPrefix(uint256 value) internal pure returns (string memory str) {
        str = toHexStringNoPrefix(value);
        /// @solidity memory-safe-assembly
        assembly {
            let o := eq(byte(0, mload(add(str, 0x20))), 0x30) // Whether leading zero is present.
            let strLength := mload(str) // Get the length.
            str := add(str, o) // Move the pointer, accounting for leading zero.
            mstore(str, sub(strLength, o)) // Write the length, accounting for leading zero.
        }
    }

    /// @dev Returns the hexadecimal representation of `value`.
    /// The output is encoded using 2 hexadecimal digits per byte.
    /// As address are 20 bytes long, the output will left-padded to have
    /// a length of `20 * 2` bytes.
    function toHexStringNoPrefix(uint256 value) internal pure returns (string memory str) {
        /// @solidity memory-safe-assembly
        assembly {
            // We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length,
            // 0x02 bytes for the prefix, and 0x40 bytes for the digits.
            // The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x40) is 0xa0.
            str := add(mload(0x40), 0x80)
            // Allocate the memory.
            mstore(0x40, add(str, 0x20))
            // Zeroize the slot after the string.
            mstore(str, 0)

            // Cache the end to calculate the length later.
            let end := str
            // Store "0123456789abcdef" in scratch space.
            mstore(0x0f, 0x30313233343536373839616263646566)

            let w := not(1) // Tsk.
            // We write the string from rightmost digit to leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            for { let temp := value } 1 {} {
                str := add(str, w) // `sub(str, 2)`.
                mstore8(add(str, 1), mload(and(temp, 15)))
                mstore8(str, mload(and(shr(4, temp), 15)))
                temp := shr(8, temp)
                if iszero(temp) { break }
            }

            // Compute the string's length.
            let strLength := sub(end, str)
            // Move the pointer and write the length.
            str := sub(str, 0x20)
            mstore(str, strLength)
        }
    }

    /// @dev Returns the hexadecimal representation of `value`.
    /// The output is prefixed with "0x", encoded using 2 hexadecimal digits per byte,
    /// and the alphabets are capitalized conditionally according to
    /// https://eips.ethereum.org/EIPS/eip-55
    function toHexStringChecksummed(address value) internal pure returns (string memory str) {
        str = toHexString(value);
        /// @solidity memory-safe-assembly
        assembly {
            let mask := shl(6, div(not(0), 255)) // `0b010000000100000000 ...`
            let o := add(str, 0x22)
            let hashed := and(keccak256(o, 40), mul(34, mask)) // `0b10001000 ... `
            let t := shl(240, 136) // `0b10001000 << 240`
            for { let i := 0 } 1 {} {
                mstore(add(i, i), mul(t, byte(i, hashed)))
                i := add(i, 1)
                if eq(i, 20) { break }
            }
            mstore(o, xor(mload(o), shr(1, and(mload(0x00), and(mload(o), mask)))))
            o := add(o, 0x20)
            mstore(o, xor(mload(o), shr(1, and(mload(0x20), and(mload(o), mask)))))
        }
    }

    /// @dev Returns the hexadecimal representation of `value`.
    /// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte.
    function toHexString(address value) internal pure returns (string memory str) {
        str = toHexStringNoPrefix(value);
        /// @solidity memory-safe-assembly
        assembly {
            let strLength := add(mload(str), 2) // Compute the length.
            mstore(str, 0x3078) // Write the "0x" prefix.
            str := sub(str, 2) // Move the pointer.
            mstore(str, strLength) // Write the length.
        }
    }

    /// @dev Returns the hexadecimal representation of `value`.
    /// The output is encoded using 2 hexadecimal digits per byte.
    function toHexStringNoPrefix(address value) internal pure returns (string memory str) {
        /// @solidity memory-safe-assembly
        assembly {
            str := mload(0x40)

            // Allocate the memory.
            // We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length,
            // 0x02 bytes for the prefix, and 0x28 bytes for the digits.
            // The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x28) is 0x80.
            mstore(0x40, add(str, 0x80))

            // Store "0123456789abcdef" in scratch space.
            mstore(0x0f, 0x30313233343536373839616263646566)

            str := add(str, 2)
            mstore(str, 40)

            let o := add(str, 0x20)
            mstore(add(o, 40), 0)

            value := shl(96, value)

            // We write the string from rightmost digit to leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            for { let i := 0 } 1 {} {
                let p := add(o, add(i, i))
                let temp := byte(i, value)
                mstore8(add(p, 1), mload(and(temp, 15)))
                mstore8(p, mload(shr(4, temp)))
                i := add(i, 1)
                if eq(i, 20) { break }
            }
        }
    }

    /// @dev Returns the hex encoded string from the raw bytes.
    /// The output is encoded using 2 hexadecimal digits per byte.
    function toHexString(bytes memory raw) internal pure returns (string memory str) {
        str = toHexStringNoPrefix(raw);
        /// @solidity memory-safe-assembly
        assembly {
            let strLength := add(mload(str), 2) // Compute the length.
            mstore(str, 0x3078) // Write the "0x" prefix.
            str := sub(str, 2) // Move the pointer.
            mstore(str, strLength) // Write the length.
        }
    }

    /// @dev Returns the hex encoded string from the raw bytes.
    /// The output is encoded using 2 hexadecimal digits per byte.
    function toHexStringNoPrefix(bytes memory raw) internal pure returns (string memory str) {
        /// @solidity memory-safe-assembly
        assembly {
            let length := mload(raw)
            str := add(mload(0x40), 2) // Skip 2 bytes for the optional prefix.
            mstore(str, add(length, length)) // Store the length of the output.

            // Store "0123456789abcdef" in scratch space.
            mstore(0x0f, 0x30313233343536373839616263646566)

            let o := add(str, 0x20)
            let end := add(raw, length)

            for {} iszero(eq(raw, end)) {} {
                raw := add(raw, 1)
                mstore8(add(o, 1), mload(and(mload(raw), 15)))
                mstore8(o, mload(and(shr(4, mload(raw)), 15)))
                o := add(o, 2)
            }
            mstore(o, 0) // Zeroize the slot after the string.
            mstore(0x40, add(o, 0x20)) // Allocate the memory.
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                   RUNE STRING OPERATIONS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the number of UTF characters in the string.
    function runeCount(string memory s) internal pure returns (uint256 result) {
        /// @solidity memory-safe-assembly
        assembly {
            if mload(s) {
                mstore(0x00, div(not(0), 255))
                mstore(0x20, 0x0202020202020202020202020202020202020202020202020303030304040506)
                let o := add(s, 0x20)
                let end := add(o, mload(s))
                for { result := 1 } 1 { result := add(result, 1) } {
                    o := add(o, byte(0, mload(shr(250, mload(o)))))
                    if iszero(lt(o, end)) { break }
                }
            }
        }
    }

    /// @dev Returns if this string is a 7-bit ASCII string.
    /// (i.e. all characters codes are in [0..127])
    function is7BitASCII(string memory s) internal pure returns (bool result) {
        /// @solidity memory-safe-assembly
        assembly {
            let mask := shl(7, div(not(0), 255))
            result := 1
            let n := mload(s)
            if n {
                let o := add(s, 0x20)
                let end := add(o, n)
                let last := mload(end)
                mstore(end, 0)
                for {} 1 {} {
                    if and(mask, mload(o)) {
                        result := 0
                        break
                    }
                    o := add(o, 0x20)
                    if iszero(lt(o, end)) { break }
                }
                mstore(end, last)
            }
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                   BYTE STRING OPERATIONS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    // For performance and bytecode compactness, byte string operations are restricted
    // to 7-bit ASCII strings. All offsets are byte offsets, not UTF character offsets.
    // Usage of byte string operations on charsets with runes spanning two or more bytes
    // can lead to undefined behavior.

    /// @dev Returns `subject` all occurrences of `search` replaced with `replacement`.
    function replace(string memory subject, string memory search, string memory replacement)
        internal
        pure
        returns (string memory result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let subjectLength := mload(subject)
            let searchLength := mload(search)
            let replacementLength := mload(replacement)

            subject := add(subject, 0x20)
            search := add(search, 0x20)
            replacement := add(replacement, 0x20)
            result := add(mload(0x40), 0x20)

            let subjectEnd := add(subject, subjectLength)
            if iszero(gt(searchLength, subjectLength)) {
                let subjectSearchEnd := add(sub(subjectEnd, searchLength), 1)
                let h := 0
                if iszero(lt(searchLength, 0x20)) { h := keccak256(search, searchLength) }
                let m := shl(3, sub(0x20, and(searchLength, 0x1f)))
                let s := mload(search)
                for {} 1 {} {
                    let t := mload(subject)
                    // Whether the first `searchLength % 32` bytes of
                    // `subject` and `search` matches.
                    if iszero(shr(m, xor(t, s))) {
                        if h {
                            if iszero(eq(keccak256(subject, searchLength), h)) {
                                mstore(result, t)
                                result := add(result, 1)
                                subject := add(subject, 1)
                                if iszero(lt(subject, subjectSearchEnd)) { break }
                                continue
                            }
                        }
                        // Copy the `replacement` one word at a time.
                        for { let o := 0 } 1 {} {
                            mstore(add(result, o), mload(add(replacement, o)))
                            o := add(o, 0x20)
                            if iszero(lt(o, replacementLength)) { break }
                        }
                        result := add(result, replacementLength)
                        subject := add(subject, searchLength)
                        if searchLength {
                            if iszero(lt(subject, subjectSearchEnd)) { break }
                            continue
                        }
                    }
                    mstore(result, t)
                    result := add(result, 1)
                    subject := add(subject, 1)
                    if iszero(lt(subject, subjectSearchEnd)) { break }
                }
            }

            let resultRemainder := result
            result := add(mload(0x40), 0x20)
            let k := add(sub(resultRemainder, result), sub(subjectEnd, subject))
            // Copy the rest of the string one word at a time.
            for {} lt(subject, subjectEnd) {} {
                mstore(resultRemainder, mload(subject))
                resultRemainder := add(resultRemainder, 0x20)
                subject := add(subject, 0x20)
            }
            result := sub(result, 0x20)
            let last := add(add(result, 0x20), k) // Zeroize the slot after the string.
            mstore(last, 0)
            mstore(0x40, add(last, 0x20)) // Allocate the memory.
            mstore(result, k) // Store the length.
        }
    }

    /// @dev Returns the byte index of the first location of `search` in `subject`,
    /// searching from left to right, starting from `from`.
    /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
    function indexOf(string memory subject, string memory search, uint256 from)
        internal
        pure
        returns (uint256 result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            for { let subjectLength := mload(subject) } 1 {} {
                if iszero(mload(search)) {
                    if iszero(gt(from, subjectLength)) {
                        result := from
                        break
                    }
                    result := subjectLength
                    break
                }
                let searchLength := mload(search)
                let subjectStart := add(subject, 0x20)

                result := not(0) // Initialize to `NOT_FOUND`.

                subject := add(subjectStart, from)
                let end := add(sub(add(subjectStart, subjectLength), searchLength), 1)

                let m := shl(3, sub(0x20, and(searchLength, 0x1f)))
                let s := mload(add(search, 0x20))

                if iszero(and(lt(subject, end), lt(from, subjectLength))) { break }

                if iszero(lt(searchLength, 0x20)) {
                    for { let h := keccak256(add(search, 0x20), searchLength) } 1 {} {
                        if iszero(shr(m, xor(mload(subject), s))) {
                            if eq(keccak256(subject, searchLength), h) {
                                result := sub(subject, subjectStart)
                                break
                            }
                        }
                        subject := add(subject, 1)
                        if iszero(lt(subject, end)) { break }
                    }
                    break
                }
                for {} 1 {} {
                    if iszero(shr(m, xor(mload(subject), s))) {
                        result := sub(subject, subjectStart)
                        break
                    }
                    subject := add(subject, 1)
                    if iszero(lt(subject, end)) { break }
                }
                break
            }
        }
    }

    /// @dev Returns the byte index of the first location of `search` in `subject`,
    /// searching from left to right.
    /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
    function indexOf(string memory subject, string memory search)
        internal
        pure
        returns (uint256 result)
    {
        result = indexOf(subject, search, 0);
    }

    /// @dev Returns the byte index of the first location of `search` in `subject`,
    /// searching from right to left, starting from `from`.
    /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
    function lastIndexOf(string memory subject, string memory search, uint256 from)
        internal
        pure
        returns (uint256 result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            for {} 1 {} {
                result := not(0) // Initialize to `NOT_FOUND`.
                let searchLength := mload(search)
                if gt(searchLength, mload(subject)) { break }
                let w := result

                let fromMax := sub(mload(subject), searchLength)
                if iszero(gt(fromMax, from)) { from := fromMax }

                let end := add(add(subject, 0x20), w)
                subject := add(add(subject, 0x20), from)
                if iszero(gt(subject, end)) { break }
                // As this function is not too often used,
                // we shall simply use keccak256 for smaller bytecode size.
                for { let h := keccak256(add(search, 0x20), searchLength) } 1 {} {
                    if eq(keccak256(subject, searchLength), h) {
                        result := sub(subject, add(end, 1))
                        break
                    }
                    subject := add(subject, w) // `sub(subject, 1)`.
                    if iszero(gt(subject, end)) { break }
                }
                break
            }
        }
    }

    /// @dev Returns the byte index of the first location of `search` in `subject`,
    /// searching from right to left.
    /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
    function lastIndexOf(string memory subject, string memory search)
        internal
        pure
        returns (uint256 result)
    {
        result = lastIndexOf(subject, search, uint256(int256(-1)));
    }

    /// @dev Returns true if `search` is found in `subject`, false otherwise.
    function contains(string memory subject, string memory search) internal pure returns (bool) {
        return indexOf(subject, search) != NOT_FOUND;
    }

    /// @dev Returns whether `subject` starts with `search`.
    function startsWith(string memory subject, string memory search)
        internal
        pure
        returns (bool result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let searchLength := mload(search)
            // Just using keccak256 directly is actually cheaper.
            // forgefmt: disable-next-item
            result := and(
                iszero(gt(searchLength, mload(subject))),
                eq(
                    keccak256(add(subject, 0x20), searchLength),
                    keccak256(add(search, 0x20), searchLength)
                )
            )
        }
    }

    /// @dev Returns whether `subject` ends with `search`.
    function endsWith(string memory subject, string memory search)
        internal
        pure
        returns (bool result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let searchLength := mload(search)
            let subjectLength := mload(subject)
            // Whether `search` is not longer than `subject`.
            let withinRange := iszero(gt(searchLength, subjectLength))
            // Just using keccak256 directly is actually cheaper.
            // forgefmt: disable-next-item
            result := and(
                withinRange,
                eq(
                    keccak256(
                        // `subject + 0x20 + max(subjectLength - searchLength, 0)`.
                        add(add(subject, 0x20), mul(withinRange, sub(subjectLength, searchLength))),
                        searchLength
                    ),
                    keccak256(add(search, 0x20), searchLength)
                )
            )
        }
    }

    /// @dev Returns `subject` repeated `times`.
    function repeat(string memory subject, uint256 times)
        internal
        pure
        returns (string memory result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let subjectLength := mload(subject)
            if iszero(or(iszero(times), iszero(subjectLength))) {
                subject := add(subject, 0x20)
                result := mload(0x40)
                let output := add(result, 0x20)
                for {} 1 {} {
                    // Copy the `subject` one word at a time.
                    for { let o := 0 } 1 {} {
                        mstore(add(output, o), mload(add(subject, o)))
                        o := add(o, 0x20)
                        if iszero(lt(o, subjectLength)) { break }
                    }
                    output := add(output, subjectLength)
                    times := sub(times, 1)
                    if iszero(times) { break }
                }
                mstore(output, 0) // Zeroize the slot after the string.
                let resultLength := sub(output, add(result, 0x20))
                mstore(result, resultLength) // Store the length.
                // Allocate the memory.
                mstore(0x40, add(result, add(resultLength, 0x20)))
            }
        }
    }

    /// @dev Returns a copy of `subject` sliced from `start` to `end` (exclusive).
    /// `start` and `end` are byte offsets.
    function slice(string memory subject, uint256 start, uint256 end)
        internal
        pure
        returns (string memory result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let subjectLength := mload(subject)
            if iszero(gt(subjectLength, end)) { end := subjectLength }
            if iszero(gt(subjectLength, start)) { start := subjectLength }
            if lt(start, end) {
                result := mload(0x40)
                let resultLength := sub(end, start)
                mstore(result, resultLength)
                subject := add(subject, start)
                let w := not(0x1f)
                // Copy the `subject` one word at a time, backwards.
                for { let o := and(add(resultLength, 0x1f), w) } 1 {} {
                    mstore(add(result, o), mload(add(subject, o)))
                    o := add(o, w) // `sub(o, 0x20)`.
                    if iszero(o) { break }
                }
                // Zeroize the slot after the string.
                mstore(add(add(result, 0x20), resultLength), 0)
                // Allocate memory for the length and the bytes,
                // rounded up to a multiple of 32.
                mstore(0x40, add(result, and(add(resultLength, 0x3f), w)))
            }
        }
    }

    /// @dev Returns a copy of `subject` sliced from `start` to the end of the string.
    /// `start` is a byte offset.
    function slice(string memory subject, uint256 start)
        internal
        pure
        returns (string memory result)
    {
        result = slice(subject, start, uint256(int256(-1)));
    }

    /// @dev Returns all the indices of `search` in `subject`.
    /// The indices are byte offsets.
    function indicesOf(string memory subject, string memory search)
        internal
        pure
        returns (uint256[] memory result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let subjectLength := mload(subject)
            let searchLength := mload(search)

            if iszero(gt(searchLength, subjectLength)) {
                subject := add(subject, 0x20)
                search := add(search, 0x20)
                result := add(mload(0x40), 0x20)

                let subjectStart := subject
                let subjectSearchEnd := add(sub(add(subject, subjectLength), searchLength), 1)
                let h := 0
                if iszero(lt(searchLength, 0x20)) { h := keccak256(search, searchLength) }
                let m := shl(3, sub(0x20, and(searchLength, 0x1f)))
                let s := mload(search)
                for {} 1 {} {
                    let t := mload(subject)
                    // Whether the first `searchLength % 32` bytes of
                    // `subject` and `search` matches.
                    if iszero(shr(m, xor(t, s))) {
                        if h {
                            if iszero(eq(keccak256(subject, searchLength), h)) {
                                subject := add(subject, 1)
                                if iszero(lt(subject, subjectSearchEnd)) { break }
                                continue
                            }
                        }
                        // Append to `result`.
                        mstore(result, sub(subject, subjectStart))
                        result := add(result, 0x20)
                        // Advance `subject` by `searchLength`.
                        subject := add(subject, searchLength)
                        if searchLength {
                            if iszero(lt(subject, subjectSearchEnd)) { break }
                            continue
                        }
                    }
                    subject := add(subject, 1)
                    if iszero(lt(subject, subjectSearchEnd)) { break }
                }
                let resultEnd := result
                // Assign `result` to the free memory pointer.
                result := mload(0x40)
                // Store the length of `result`.
                mstore(result, shr(5, sub(resultEnd, add(result, 0x20))))
                // Allocate memory for result.
                // We allocate one more word, so this array can be recycled for {split}.
                mstore(0x40, add(resultEnd, 0x20))
            }
        }
    }

    /// @dev Returns a arrays of strings based on the `delimiter` inside of the `subject` string.
    function split(string memory subject, string memory delimiter)
        internal
        pure
        returns (string[] memory result)
    {
        uint256[] memory indices = indicesOf(subject, delimiter);
        /// @solidity memory-safe-assembly
        assembly {
            let w := not(0x1f)
            let indexPtr := add(indices, 0x20)
            let indicesEnd := add(indexPtr, shl(5, add(mload(indices), 1)))
            mstore(add(indicesEnd, w), mload(subject))
            mstore(indices, add(mload(indices), 1))
            let prevIndex := 0
            for {} 1 {} {
                let index := mload(indexPtr)
                mstore(indexPtr, 0x60)
                if iszero(eq(index, prevIndex)) {
                    let element := mload(0x40)
                    let elementLength := sub(index, prevIndex)
                    mstore(element, elementLength)
                    // Copy the `subject` one word at a time, backwards.
                    for { let o := and(add(elementLength, 0x1f), w) } 1 {} {
                        mstore(add(element, o), mload(add(add(subject, prevIndex), o)))
                        o := add(o, w) // `sub(o, 0x20)`.
                        if iszero(o) { break }
                    }
                    // Zeroize the slot after the string.
                    mstore(add(add(element, 0x20), elementLength), 0)
                    // Allocate memory for the length and the bytes,
                    // rounded up to a multiple of 32.
                    mstore(0x40, add(element, and(add(elementLength, 0x3f), w)))
                    // Store the `element` into the array.
                    mstore(indexPtr, element)
                }
                prevIndex := add(index, mload(delimiter))
                indexPtr := add(indexPtr, 0x20)
                if iszero(lt(indexPtr, indicesEnd)) { break }
            }
            result := indices
            if iszero(mload(delimiter)) {
                result := add(indices, 0x20)
                mstore(result, sub(mload(indices), 2))
            }
        }
    }

    /// @dev Returns a concatenated string of `a` and `b`.
    /// Cheaper than `string.concat()` and does not de-align the free memory pointer.
    function concat(string memory a, string memory b)
        internal
        pure
        returns (string memory result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let w := not(0x1f)
            result := mload(0x40)
            let aLength := mload(a)
            // Copy `a` one word at a time, backwards.
            for { let o := and(add(aLength, 0x20), w) } 1 {} {
                mstore(add(result, o), mload(add(a, o)))
                o := add(o, w) // `sub(o, 0x20)`.
                if iszero(o) { break }
            }
            let bLength := mload(b)
            let output := add(result, aLength)
            // Copy `b` one word at a time, backwards.
            for { let o := and(add(bLength, 0x20), w) } 1 {} {
                mstore(add(output, o), mload(add(b, o)))
                o := add(o, w) // `sub(o, 0x20)`.
                if iszero(o) { break }
            }
            let totalLength := add(aLength, bLength)
            let last := add(add(result, 0x20), totalLength)
            // Zeroize the slot after the string.
            mstore(last, 0)
            // Stores the length.
            mstore(result, totalLength)
            // Allocate memory for the length and the bytes,
            // rounded up to a multiple of 32.
            mstore(0x40, and(add(last, 0x1f), w))
        }
    }

    /// @dev Returns a copy of the string in either lowercase or UPPERCASE.
    /// WARNING! This function is only compatible with 7-bit ASCII strings.
    function toCase(string memory subject, bool toUpper)
        internal
        pure
        returns (string memory result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let length := mload(subject)
            if length {
                result := add(mload(0x40), 0x20)
                subject := add(subject, 1)
                let flags := shl(add(70, shl(5, toUpper)), 0x3ffffff)
                let w := not(0)
                for { let o := length } 1 {} {
                    o := add(o, w)
                    let b := and(0xff, mload(add(subject, o)))
                    mstore8(add(result, o), xor(b, and(shr(b, flags), 0x20)))
                    if iszero(o) { break }
                }
                result := mload(0x40)
                mstore(result, length) // Store the length.
                let last := add(add(result, 0x20), length)
                mstore(last, 0) // Zeroize the slot after the string.
                mstore(0x40, add(last, 0x20)) // Allocate the memory.
            }
        }
    }

    /// @dev Returns a string from a small bytes32 string.
    /// `s` must be null-terminated, or behavior will be undefined.
    function fromSmallString(bytes32 s) internal pure returns (string memory result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := mload(0x40)
            let n := 0
            for {} byte(n, s) { n := add(n, 1) } {} // Scan for '\0'.
            mstore(result, n)
            let o := add(result, 0x20)
            mstore(o, s)
            mstore(add(o, n), 0)
            mstore(0x40, add(result, 0x40))
        }
    }

    /// @dev Returns the small string, with all bytes after the first null byte zeroized.
    function normalizeSmallString(bytes32 s) internal pure returns (bytes32 result) {
        /// @solidity memory-safe-assembly
        assembly {
            for {} byte(result, s) { result := add(result, 1) } {} // Scan for '\0'.
            mstore(0x00, s)
            mstore(result, 0x00)
            result := mload(0x00)
        }
    }

    /// @dev Returns the string as a normalized null-terminated small string.
    function toSmallString(string memory s) internal pure returns (bytes32 result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := mload(s)
            if iszero(lt(result, 33)) {
                mstore(0x00, 0xec92f9a3) // `TooBigForSmallString()`.
                revert(0x1c, 0x04)
            }
            result := shl(shl(3, sub(32, result)), mload(add(s, result)))
        }
    }

    /// @dev Returns a lowercased copy of the string.
    /// WARNING! This function is only compatible with 7-bit ASCII strings.
    function lower(string memory subject) internal pure returns (string memory result) {
        result = toCase(subject, false);
    }

    /// @dev Returns an UPPERCASED copy of the string.
    /// WARNING! This function is only compatible with 7-bit ASCII strings.
    function upper(string memory subject) internal pure returns (string memory result) {
        result = toCase(subject, true);
    }

    /// @dev Escapes the string to be used within HTML tags.
    function escapeHTML(string memory s) internal pure returns (string memory result) {
        /// @solidity memory-safe-assembly
        assembly {
            let end := add(s, mload(s))
            result := add(mload(0x40), 0x20)
            // Store the bytes of the packed offsets and strides into the scratch space.
            // `packed = (stride << 5) | offset`. Max offset is 20. Max stride is 6.
            mstore(0x1f, 0x900094)
            mstore(0x08, 0xc0000000a6ab)
            // Store "&quot;&amp;&#39;&lt;&gt;" into the scratch space.
            mstore(0x00, shl(64, 0x2671756f743b26616d703b262333393b266c743b2667743b))
            for {} iszero(eq(s, end)) {} {
                s := add(s, 1)
                let c := and(mload(s), 0xff)
                // Not in `["\"","'","&","<",">"]`.
                if iszero(and(shl(c, 1), 0x500000c400000000)) {
                    mstore8(result, c)
                    result := add(result, 1)
                    continue
                }
                let t := shr(248, mload(c))
                mstore(result, mload(and(t, 0x1f)))
                result := add(result, shr(5, t))
            }
            let last := result
            mstore(last, 0) // Zeroize the slot after the string.
            result := mload(0x40)
            mstore(result, sub(last, add(result, 0x20))) // Store the length.
            mstore(0x40, add(last, 0x20)) // Allocate the memory.
        }
    }

    /// @dev Escapes the string to be used within double-quotes in a JSON.
    /// If `addDoubleQuotes` is true, the result will be enclosed in double-quotes.
    function escapeJSON(string memory s, bool addDoubleQuotes)
        internal
        pure
        returns (string memory result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let end := add(s, mload(s))
            result := add(mload(0x40), 0x20)
            if addDoubleQuotes {
                mstore8(result, 34)
                result := add(1, result)
            }
            // Store "\\u0000" in scratch space.
            // Store "0123456789abcdef" in scratch space.
            // Also, store `{0x08:"b", 0x09:"t", 0x0a:"n", 0x0c:"f", 0x0d:"r"}`.
            // into the scratch space.
            mstore(0x15, 0x5c75303030303031323334353637383961626364656662746e006672)
            // Bitmask for detecting `["\"","\\"]`.
            let e := or(shl(0x22, 1), shl(0x5c, 1))
            for {} iszero(eq(s, end)) {} {
                s := add(s, 1)
                let c := and(mload(s), 0xff)
                if iszero(lt(c, 0x20)) {
                    if iszero(and(shl(c, 1), e)) {
                        // Not in `["\"","\\"]`.
                        mstore8(result, c)
                        result := add(result, 1)
                        continue
                    }
                    mstore8(result, 0x5c) // "\\".
                    mstore8(add(result, 1), c)
                    result := add(result, 2)
                    continue
                }
                if iszero(and(shl(c, 1), 0x3700)) {
                    // Not in `["\b","\t","\n","\f","\d"]`.
                    mstore8(0x1d, mload(shr(4, c))) // Hex value.
                    mstore8(0x1e, mload(and(c, 15))) // Hex value.
                    mstore(result, mload(0x19)) // "\\u00XX".
                    result := add(result, 6)
                    continue
                }
                mstore8(result, 0x5c) // "\\".
                mstore8(add(result, 1), mload(add(c, 8)))
                result := add(result, 2)
            }
            if addDoubleQuotes {
                mstore8(result, 34)
                result := add(1, result)
            }
            let last := result
            mstore(last, 0) // Zeroize the slot after the string.
            result := mload(0x40)
            mstore(result, sub(last, add(result, 0x20))) // Store the length.
            mstore(0x40, add(last, 0x20)) // Allocate the memory.
        }
    }

    /// @dev Escapes the string to be used within double-quotes in a JSON.
    function escapeJSON(string memory s) internal pure returns (string memory result) {
        result = escapeJSON(s, false);
    }

    /// @dev Returns whether `a` equals `b`.
    function eq(string memory a, string memory b) internal pure returns (bool result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := eq(keccak256(add(a, 0x20), mload(a)), keccak256(add(b, 0x20), mload(b)))
        }
    }

    /// @dev Returns whether `a` equals `b`, where `b` is a null-terminated small string.
    function eqs(string memory a, bytes32 b) internal pure returns (bool result) {
        /// @solidity memory-safe-assembly
        assembly {
            // These should be evaluated on compile time, as far as possible.
            let m := not(shl(7, div(not(iszero(b)), 255))) // `0x7f7f ...`.
            let x := not(or(m, or(b, add(m, and(b, m)))))
            let r := shl(7, iszero(iszero(shr(128, x))))
            r := or(r, shl(6, iszero(iszero(shr(64, shr(r, x))))))
            r := or(r, shl(5, lt(0xffffffff, shr(r, x))))
            r := or(r, shl(4, lt(0xffff, shr(r, x))))
            r := or(r, shl(3, lt(0xff, shr(r, x))))
            // forgefmt: disable-next-item
            result := gt(eq(mload(a), add(iszero(x), xor(31, shr(3, r)))),
                xor(shr(add(8, r), b), shr(add(8, r), mload(add(a, 0x20)))))
        }
    }

    /// @dev Packs a single string with its length into a single word.
    /// Returns `bytes32(0)` if the length is zero or greater than 31.
    function packOne(string memory a) internal pure returns (bytes32 result) {
        /// @solidity memory-safe-assembly
        assembly {
            // We don't need to zero right pad the string,
            // since this is our own custom non-standard packing scheme.
            result :=
                mul(
                    // Load the length and the bytes.
                    mload(add(a, 0x1f)),
                    // `length != 0 && length < 32`. Abuses underflow.
                    // Assumes that the length is valid and within the block gas limit.
                    lt(sub(mload(a), 1), 0x1f)
                )
        }
    }

    /// @dev Unpacks a string packed using {packOne}.
    /// Returns the empty string if `packed` is `bytes32(0)`.
    /// If `packed` is not an output of {packOne}, the output behavior is undefined.
    function unpackOne(bytes32 packed) internal pure returns (string memory result) {
        /// @solidity memory-safe-assembly
        assembly {
            // Grab the free memory pointer.
            result := mload(0x40)
            // Allocate 2 words (1 for the length, 1 for the bytes).
            mstore(0x40, add(result, 0x40))
            // Zeroize the length slot.
            mstore(result, 0)
            // Store the length and bytes.
            mstore(add(result, 0x1f), packed)
            // Right pad with zeroes.
            mstore(add(add(result, 0x20), mload(result)), 0)
        }
    }

    /// @dev Packs two strings with their lengths into a single word.
    /// Returns `bytes32(0)` if combined length is zero or greater than 30.
    function packTwo(string memory a, string memory b) internal pure returns (bytes32 result) {
        /// @solidity memory-safe-assembly
        assembly {
            let aLength := mload(a)
            // We don't need to zero right pad the strings,
            // since this is our own custom non-standard packing scheme.
            result :=
                mul(
                    // Load the length and the bytes of `a` and `b`.
                    or(
                        shl(shl(3, sub(0x1f, aLength)), mload(add(a, aLength))),
                        mload(sub(add(b, 0x1e), aLength))
                    ),
                    // `totalLength != 0 && totalLength < 31`. Abuses underflow.
                    // Assumes that the lengths are valid and within the block gas limit.
                    lt(sub(add(aLength, mload(b)), 1), 0x1e)
                )
        }
    }

    /// @dev Unpacks strings packed using {packTwo}.
    /// Returns the empty strings if `packed` is `bytes32(0)`.
    /// If `packed` is not an output of {packTwo}, the output behavior is undefined.
    function unpackTwo(bytes32 packed)
        internal
        pure
        returns (string memory resultA, string memory resultB)
    {
        /// @solidity memory-safe-assembly
        assembly {
            // Grab the free memory pointer.
            resultA := mload(0x40)
            resultB := add(resultA, 0x40)
            // Allocate 2 words for each string (1 for the length, 1 for the byte). Total 4 words.
            mstore(0x40, add(resultB, 0x40))
            // Zeroize the length slots.
            mstore(resultA, 0)
            mstore(resultB, 0)
            // Store the lengths and bytes.
            mstore(add(resultA, 0x1f), packed)
            mstore(add(resultB, 0x1f), mload(add(add(resultA, 0x20), mload(resultA))))
            // Right pad with zeroes.
            mstore(add(add(resultA, 0x20), mload(resultA)), 0)
            mstore(add(add(resultB, 0x20), mload(resultB)), 0)
        }
    }

    /// @dev Directly returns `a` without copying.
    function directReturn(string memory a) internal pure {
        assembly {
            // Assumes that the string does not start from the scratch space.
            let retStart := sub(a, 0x20)
            let retSize := add(mload(a), 0x40)
            // Right pad with zeroes. Just in case the string is produced
            // by a method that doesn't zero right pad.
            mstore(add(retStart, retSize), 0)
            // Store the return offset.
            mstore(retStart, 0x20)
            // End the transaction, returning the string.
            return(retStart, retSize)
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.23;

interface PaletteRenderer {
    function disconnect() external view;
    function render(uint256 $id) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC721Receiver.sol)

pragma solidity ^0.8.20;

import {IERC721Receiver} from "../token/ERC721/IERC721Receiver.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../utils/introspection/IERC165.sol";

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {IERC165} from "@openzeppelin/contracts/interfaces/IERC165.sol";

interface IERC404 is IERC165 {
    error NotFound();
    error InvalidTokenId();
    error AlreadyExists();
    error InvalidRecipient();
    error InvalidSender();
    error InvalidSpender();
    error InvalidOperator();
    error UnsafeRecipient();
    error RecipientIsERC721TransferExempt();
    error Unauthorized();
    error InsufficientAllowance();
    error DecimalsTooLow();
    error PermitDeadlineExpired();
    error InvalidSigner();
    error InvalidApproval();
    error OwnedIndexOverflow();
    error MintLimitReached();
    error InvalidExemption();

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

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

    function decimals() external view returns (uint8);

    function totalSupply() external view returns (uint256);

    function erc20TotalSupply() external view returns (uint256);

    function erc721TotalSupply() external view returns (uint256);

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

    function erc721BalanceOf(address owner_) external view returns (uint256);

    function erc20BalanceOf(address owner_) external view returns (uint256);

    function erc721TransferExempt(
        address account_
    ) external view returns (bool);

    function isApprovedForAll(
        address owner_,
        address operator_
    ) external view returns (bool);

    function allowance(
        address owner_,
        address spender_
    ) external view returns (uint256);

    function owned(address owner_) external view returns (uint256[] memory);

    function ownerOf(uint256 id_) external view returns (address erc721Owner);

    function tokenURI(uint256 id_) external view returns (string memory);

    function approve(
        address spender_,
        uint256 valueOrId_
    ) external returns (bool);

    function erc20Approve(
        address spender_,
        uint256 value_
    ) external returns (bool);

    function erc721Approve(address spender_, uint256 id_) external;

    function setApprovalForAll(address operator_, bool approved_) external;

    function transferFrom(
        address from_,
        address to_,
        uint256 valueOrId_
    ) external returns (bool);

    function erc20TransferFrom(
        address from_,
        address to_,
        uint256 value_
    ) external returns (bool);

    function erc721TransferFrom(
        address from_,
        address to_,
        uint256 id_
    ) external;

    function transfer(address to_, uint256 amount_) external returns (bool);

    function getERC721QueueLength() external view returns (uint256);

    function getERC721TokensInQueue(
        uint256 start_,
        uint256 count_
    ) external view returns (uint256[] memory);

    function setSelfERC721TransferExempt(bool state_) external;

    function safeTransferFrom(address from_, address to_, uint256 id_) external;

    function safeTransferFrom(
        address from_,
        address to_,
        uint256 id_,
        bytes calldata data_
    ) external;

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function permit(
        address owner_,
        address spender_,
        uint256 value_,
        uint256 deadline_,
        uint8 v_,
        bytes32 r_,
        bytes32 s_
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/structs/DoubleEndedQueue.sol)
// Modified by Pandora Labs to support native uint256 operations
pragma solidity ^0.8.20;

/**
 * @dev A sequence of items with the ability to efficiently push and pop items (i.e. insert and remove) on both ends of
 * the sequence (called front and back). Among other access patterns, it can be used to implement efficient LIFO and
 * FIFO queues. Storage use is optimized, and all operations are O(1) constant time. This includes {clear}, given that
 * the existing queue contents are left in storage.
 *
 * The struct is called `Uint256Deque`. This data structure can only be used in storage, and not in memory.
 *
 * ```solidity
 * DoubleEndedQueue.Uint256Deque queue;
 * ```
 */
library DoubleEndedQueue {
    /**
     * @dev An operation (e.g. {front}) couldn't be completed due to the queue being empty.
     */
    error QueueEmpty();

    /**
     * @dev A push operation couldn't be completed due to the queue being full.
     */
    error QueueFull();

    /**
     * @dev An operation (e.g. {at}) couldn't be completed due to an index being out of bounds.
     */
    error QueueOutOfBounds();

    /**
     * @dev Indices are 128 bits so begin and end are packed in a single storage slot for efficient access.
     *
     * Struct members have an underscore prefix indicating that they are "private" and should not be read or written to
     * directly. Use the functions provided below instead. Modifying the struct manually may violate assumptions and
     * lead to unexpected behavior.
     *
     * The first item is at data[begin] and the last item is at data[end - 1]. This range can wrap around.
     */
    struct Uint256Deque {
        uint128 _begin;
        uint128 _end;
        mapping(uint128 index => uint256) _data;
    }

    /**
     * @dev Inserts an item at the end of the queue.
     *
     * Reverts with {QueueFull} if the queue is full.
     */
    function pushBack(Uint256Deque storage deque, uint256 value) internal {
        unchecked {
            uint128 backIndex = deque._end;
            if (backIndex + 1 == deque._begin) revert QueueFull();
            deque._data[backIndex] = value;
            deque._end = backIndex + 1;
        }
    }

    /**
     * @dev Removes the item at the end of the queue and returns it.
     *
     * Reverts with {QueueEmpty} if the queue is empty.
     */
    function popBack(
        Uint256Deque storage deque
    ) internal returns (uint256 value) {
        unchecked {
            uint128 backIndex = deque._end;
            if (backIndex == deque._begin) revert QueueEmpty();
            --backIndex;
            value = deque._data[backIndex];
            delete deque._data[backIndex];
            deque._end = backIndex;
        }
    }

    /**
     * @dev Inserts an item at the beginning of the queue.
     *
     * Reverts with {QueueFull} if the queue is full.
     */
    function pushFront(Uint256Deque storage deque, uint256 value) internal {
        unchecked {
            uint128 frontIndex = deque._begin - 1;
            if (frontIndex == deque._end) revert QueueFull();
            deque._data[frontIndex] = value;
            deque._begin = frontIndex;
        }
    }

    /**
     * @dev Removes the item at the beginning of the queue and returns it.
     *
     * Reverts with `QueueEmpty` if the queue is empty.
     */
    function popFront(
        Uint256Deque storage deque
    ) internal returns (uint256 value) {
        unchecked {
            uint128 frontIndex = deque._begin;
            if (frontIndex == deque._end) revert QueueEmpty();
            value = deque._data[frontIndex];
            delete deque._data[frontIndex];
            deque._begin = frontIndex + 1;
        }
    }

    /**
     * @dev Returns the item at the beginning of the queue.
     *
     * Reverts with `QueueEmpty` if the queue is empty.
     */
    function front(
        Uint256Deque storage deque
    ) internal view returns (uint256 value) {
        if (empty(deque)) revert QueueEmpty();
        return deque._data[deque._begin];
    }

    /**
     * @dev Returns the item at the end of the queue.
     *
     * Reverts with `QueueEmpty` if the queue is empty.
     */
    function back(
        Uint256Deque storage deque
    ) internal view returns (uint256 value) {
        if (empty(deque)) revert QueueEmpty();
        unchecked {
            return deque._data[deque._end - 1];
        }
    }

    /**
     * @dev Return the item at a position in the queue given by `index`, with the first item at 0 and last item at
     * `length(deque) - 1`.
     *
     * Reverts with `QueueOutOfBounds` if the index is out of bounds.
     */
    function at(
        Uint256Deque storage deque,
        uint256 index
    ) internal view returns (uint256 value) {
        if (index >= length(deque)) revert QueueOutOfBounds();
        // By construction, length is a uint128, so the check above ensures that index can be safely downcast to uint128
        unchecked {
            return deque._data[deque._begin + uint128(index)];
        }
    }

    /**
     * @dev Resets the queue back to being empty.
     *
     * NOTE: The current items are left behind in storage. This does not affect the functioning of the queue, but misses
     * out on potential gas refunds.
     */
    function clear(Uint256Deque storage deque) internal {
        deque._begin = 0;
        deque._end = 0;
    }

    /**
     * @dev Returns the number of items in the queue.
     */
    function length(
        Uint256Deque storage deque
    ) internal view returns (uint256) {
        unchecked {
            return uint256(deque._end - deque._begin);
        }
    }

    /**
     * @dev Returns true if the queue is empty.
     */
    function empty(Uint256Deque storage deque) internal view returns (bool) {
        return deque._end == deque._begin;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

library ERC721Events {
    event ApprovalForAll(
        address indexed owner,
        address indexed operator,
        bool approved
    );
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 indexed id
    );
    event Transfer(
        address indexed from,
        address indexed to,
        uint256 indexed id
    );
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

library ERC20Events {
    event Approval(
        address indexed owner, address indexed spender, uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 amount);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.20;

/**
 * @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 v5.0.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @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);
}

{
  "remappings": [
    "forge-std/=lib/forge-std/src/",
    "murky/=lib/murky/src/",
    "solady/=node_modules/solady/",
    "@openzeppelin/contracts/=node_modules/@openzeppelin/contracts/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "openzeppelin-contracts/=lib/murky/lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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ype":"function"},{"inputs":[{"internalType":"address","name":"spender_","type":"address"},{"internalType":"uint256","name":"value_","type":"uint256"}],"name":"erc20Approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"}],"name":"erc20BalanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"erc20TotalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from_","type":"address"},{"internalType":"address","name":"to_","type":"address"},{"internalType":"uint256","name":"value_","type":"uint256"}],"name":"erc20TransferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender_","type":"address"},{"internalType":"uint256","name":"id_","type":"uint256"}],"name":"erc721Approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"}],"name":"erc721BalanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"erc721TotalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"target_","type":"address"}],"name":"erc721TransferExempt","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from_","type":"address"},{"internalType":"address","name":"to_","type":"address"},{"internalType":"uint256","name":"id_","type":"uint256"}],"name":"erc721TransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getERC721QueueLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"start_","type":"uint256"},{"internalType":"uint256","name":"count_","type":"uint256"}],"name":"getERC721TokensInQueue","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"locked","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"$recipients","type":"address[]"},{"internalType":"uint256[]","name":"$amounts","type":"uint256[]"}],"name":"mint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"minted","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"}],"name":"owned","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id_","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"erc721Owner","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"},{"internalType":"address","name":"spender_","type":"address"},{"internalType":"uint256","name":"value_","type":"uint256"},{"internalType":"uint256","name":"deadline_","type":"uint256"},{"internalType":"uint8","name":"v_","type":"uint8"},{"internalType":"bytes32","name":"r_","type":"bytes32"},{"internalType":"bytes32","name":"s_","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renderer","outputs":[{"internalType":"contract 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-----Decoded View---------------
Arg [0] : $owner (address): 0xBabb6638172865996B1480210D8f2D4eD0FE9a52
Arg [1] : $minter (address): 0x54239a172810ba1c65e1f6e647D8546e6B1273B9
Arg [2] : $baseTokenURI (string): ipfs://bafybeibec5u4y3yseifqze3vaybwrkxm7skuz4c3qi3i3gcsl33peszwua/
Arg [3] : $name (string): Palette
Arg [4] : $symbol (string): PLT
Arg [5] : $decimals (uint8): 18

-----Encoded View---------------
14 Constructor Arguments found :
Arg [0] : 000000000000000000000000babb6638172865996b1480210d8f2d4ed0fe9a52
Arg [1] : 00000000000000000000000054239a172810ba1c65e1f6e647d8546e6b1273b9
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000140
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000180
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000043
Arg [7] : 697066733a2f2f6261667962656962656335753479337973656966717a653376
Arg [8] : 61796277726b786d37736b757a34633371693369336763736c33337065737a77
Arg [9] : 75612f0000000000000000000000000000000000000000000000000000000000
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000007
Arg [11] : 50616c6574746500000000000000000000000000000000000000000000000000
Arg [12] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [13] : 504c540000000000000000000000000000000000000000000000000000000000