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Contract

0xCC75C17bF9cEE166f7d093d1823f069E9D9Ed2c9

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Type
Contract · 8,752 bytes of code

ArkadaCollection Verified

Compiler
solc 0.8.28+commit.7893614a
Language
Solidity
Optimization
Yes, 200 runs
EVM version
cancun
License
—
Verified
2026-10-12

project/contracts/instances/ArkadaCollection.sol

and 23 more files

Solidity
// SPDX-License-Identifier: MIT
pragma solidity 0.8.28;

import {
    ERC721Upgradeable
} from "@openzeppelin/contracts-upgradeable/token/ERC721/ERC721Upgradeable.sol";
import {
    ERC2981Upgradeable
} from "@openzeppelin/contracts-upgradeable/token/common/ERC2981Upgradeable.sol";
import {
    OwnableUpgradeable
} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import {
    ReentrancyGuard
} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import {IArkadaConfig} from "../interfaces/IArkadaConfig.sol";
import {ICollectionReporter} from "../interfaces/ICollectionReporter.sol";

/// @notice Arguments a creator supplies when their collection is created.
/// @param name ERC-721 name.
/// @param symbol ERC-721 symbol.
/// @param tokenURI Metadata URI shared by every token of the collection.
/// @param maxSupply Hard cap; zero means unlimited.
/// @param royaltyBps ERC-2981 royalty in basis points, paid to the creator.
/// @param soulbound Whether tokens are non-transferable.
/// @param mintPriceWei Price a minter pays per token.
struct CreateParams {
    string name;
    string symbol;
    string tokenURI;
    uint256 maxSupply;
    uint96 royaltyBps;
    bool soulbound;
    uint256 mintPriceWei;
}

/// @title ArkadaCollection
/// @notice User-owned ERC-721 collection with a paid public mint, created one
/// per "create a collection" action.
/// @dev Beacon implementation behind `CollectionBeacon`: a single `upgradeTo`
/// changes the logic of every collection already created on the network.
///
/// Every parameter is fixed at creation from the backend-signed `CreateParams`
/// and has no setter: neither the creator nor anyone else can change the price,
/// the metadata or the royalty afterwards, so a minter can rely on what the
/// collection advertised.
///
/// The instance emits no events of its own beyond the standard ERC-721 ones —
/// mints are reported to the factory, which forwards them to `ArkadaEventHub`.
contract ArkadaCollection is
    ERC721Upgradeable,
    ERC2981Upgradeable,
    OwnableUpgradeable,
    ReentrancyGuard
{
    /// @notice Configuration registry supplying the treasury and fee parameters.
    IArkadaConfig public config;
    string private _uri;
    /// @notice Hard cap on supply; zero means unlimited.
    uint256 public maxSupply;
    /// @notice Whether tokens are non-transferable.
    bool public soulbound;
    /// @notice Price per token, fixed at creation.
    uint256 public mintPrice;
    uint256 private _nextTokenId;

    /// @notice Factory that created this collection and relays its mint events.
    /// @dev Fixed at initialization. Instances are created on the fly and cannot
    /// hold `EMITTER_ROLE`, so they report here and the factory writes to the hub.
    ICollectionReporter public factory;

    /// @notice Mint quantity was zero.
    error ZeroQuantity();
    /// @notice Mint would exceed `maxSupply`.
    error ExceedsSupply();
    /// @notice Sent value was below the required price.
    error InsufficientPayment();
    /// @notice Transfer attempted on a soulbound collection.
    error Soulbound();
    /// @notice Withdrawal attempted with an empty balance.
    error NoFunds();
    /// @notice A native transfer was rejected by its recipient.
    error TransferFailed();

    /// @notice Locks the implementation so it can never be initialized directly.
    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() {
        _disableInitializers();
    }

    /// @notice Initializes a freshly deployed proxy.
    /// @dev Called atomically by `BeaconProxy`'s constructor, so there is no
    /// window in which an outsider could claim the instance.
    /// @param p Creator-supplied collection parameters.
    /// @param creator Becomes the owner and the royalty recipient.
    /// @param config_ Configuration registry.
    /// @param factory_ Factory that will relay this collection's events.
    function initialize(
        CreateParams calldata p,
        address creator,
        IArkadaConfig config_,
        ICollectionReporter factory_
    ) external initializer {
        __ERC721_init(p.name, p.symbol);
        __ERC2981_init();
        __Ownable_init(creator);
        config = config_;
        factory = factory_;
        _uri = p.tokenURI;
        maxSupply = p.maxSupply;
        soulbound = p.soulbound;
        mintPrice = p.mintPriceWei;
        _nextTokenId = 1;
        if (p.royaltyBps > 0) _setDefaultRoyalty(creator, p.royaltyBps);
    }

    /// @notice Mints `qty` tokens to the caller.
    /// @dev The caller pays `pricePerToken() * qty` and nothing more. The
    /// protocol fee is a share of that amount, forwarded to the treasury
    /// immediately; whatever is left accrues here until the creator withdraws it.
    /// At `mintFeeBps = 10000` the fee is the whole payment. Overpayment is
    /// refunded. Logging is critical here, unlike in `withdraw`: a missing
    /// `CollectionMint` would leave an unrecoverable hole in progress and streak
    /// data, so it is better not to mint at all.
    /// @param qty Number of tokens to mint.
    function mint(uint256 qty) external payable nonReentrant {
        if (qty == 0) revert ZeroQuantity();
        if (maxSupply != 0 && _nextTokenId + qty - 1 > maxSupply)
            revert ExceedsSupply();

        uint256 required = pricePerToken() * qty;
        uint256 fee = feePerToken() * qty;
        uint256 revenue = required - fee;
        if (msg.value < required) revert InsufficientPayment();

        if (fee > 0) {
            (bool ok, ) = config.treasury().call{value: fee}("");
            if (!ok) revert TransferFailed();
        }

        uint256 firstTokenId = _nextTokenId;
        for (uint256 i = 0; i < qty; i++) {
            _safeMint(msg.sender, _nextTokenId);
            _nextTokenId++;
        }
        factory.recordMint(msg.sender, qty, firstTokenId, revenue, fee);

        uint256 refund = msg.value - required;
        if (refund > 0) {
            (bool ok, ) = msg.sender.call{value: refund}("");
            if (!ok) revert TransferFailed();
        }
    }

    /// @notice What a minter actually pays per token.
    /// @dev The `mintPrice` fixed at creation, raised to `minMintFee` when it
    /// would fall below it. The price itself is already backend-controlled — it
    /// is covered by the voucher's `paramsHash` and has no setter — so the floor
    /// is a second line of defence against a free mint, which would make the
    /// collection-mint step of the daily run farmable for nothing.
    /// @return Price per token, in wei.
    function pricePerToken() public view returns (uint256) {
        uint256 floor = config.minMintFee();
        return mintPrice > floor ? mintPrice : floor;
    }

    /// @notice Share of the price that goes to the treasury.
    /// @dev Taken out of `pricePerToken()`, never added on top of it, so raising
    /// `mintFeeBps` shifts the split rather than the price. At 10000 the fee
    /// equals the whole price and the creator receives nothing. Never exceeds
    /// `pricePerToken()`: the percentage part cannot, because `mintFeeBps` is
    /// capped at 10000, and the floor cannot, because the price is floored by the
    /// same value — so subtracting the fee from the price cannot underflow.
    /// @return Fee per token, in wei.
    function feePerToken() public view returns (uint256) {
        uint256 floor = config.minMintFee();
        uint256 pct = (pricePerToken() * config.mintFeeBps()) / 10000;
        return pct > floor ? pct : floor;
    }

    /// @notice Total a minter must send for `qty` tokens.
    /// @param qty Number of tokens.
    /// @return Required value, in wei.
    function totalMintCost(uint256 qty) external view returns (uint256) {
        return pricePerToken() * qty;
    }

    /// @notice Number of tokens minted so far.
    /// @return Current supply.
    function totalSupply() external view returns (uint256) {
        return _nextTokenId - 1;
    }

    /// @notice Sends the collection's whole balance to its owner.
    /// @dev Deliberately does not report to the factory. A withdrawal is not
    /// progress data, so logging it would buy nothing while making the owner's
    /// only way out of the contract depend on the event infrastructure — and this
    /// collection remembers its factory forever, so revoking that factory's
    /// `EMITTER_ROLE` after a redeploy would have locked the funds for good.
    /// With no external dependency here, that failure mode does not exist.
    function withdraw() external onlyOwner nonReentrant {
        uint256 bal = address(this).balance;
        if (bal == 0) revert NoFunds();
        (bool ok, ) = owner().call{value: bal}("");
        if (!ok) revert TransferFailed();
    }

    /// @notice Metadata URI of a token.
    /// @dev Every token shares one URI.
    /// @param tokenId Token to query; must exist.
    /// @return The collection-wide URI.
    function tokenURI(
        uint256 tokenId
    ) public view override returns (string memory) {
        _requireOwned(tokenId);
        return _uri;
    }

    /// @notice Blocks transfers on soulbound collections.
    /// @dev Minting (`from == 0`) and burning (`to == 0`) stay allowed.
    /// @param to Recipient.
    /// @param tokenId Token being moved.
    /// @param auth Address authorising the move.
    /// @return Previous owner.
    function _update(
        address to,
        uint256 tokenId,
        address auth
    ) internal override returns (address) {
        address from = _ownerOf(tokenId);
        if (soulbound && from != address(0) && to != address(0))
            revert Soulbound();
        return super._update(to, tokenId, auth);
    }

    /// @notice ERC-165 support, covering ERC-721 and ERC-2981.
    /// @param id Interface identifier.
    /// @return True if supported.
    function supportsInterface(
        bytes4 id
    )
        public
        view
        override(ERC721Upgradeable, ERC2981Upgradeable)
        returns (bool)
    {
        return super.supportsInterface(id);
    }

    /// @notice Accepts direct native transfers, which the owner can withdraw.
    receive() external payable {}
}

Other files

  • npm/@openzeppelin/contracts-upgradeable@5.6.1/access/OwnableUpgradeable.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
    
    pragma solidity ^0.8.20;
    
    import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
    import {Initializable} from "@openzeppelin/contracts/proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
        /// @custom:storage-location erc7201:openzeppelin.storage.Ownable
        struct OwnableStorage {
            address _owner;
        }
    
        // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable")) - 1)) & ~bytes32(uint256(0xff))
        bytes32 private constant OwnableStorageLocation = 0x9016d09d72d40fdae2fd8ceac6b6234c7706214fd39c1cd1e609a0528c199300;
    
        function _getOwnableStorage() private pure returns (OwnableStorage storage $) {
            assembly {
                $.slot := OwnableStorageLocation
            }
        }
    
        /**
         * @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.
         */
        function __Ownable_init(address initialOwner) internal onlyInitializing {
            __Ownable_init_unchained(initialOwner);
        }
    
        function __Ownable_init_unchained(address initialOwner) internal onlyInitializing {
            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) {
            OwnableStorage storage $ = _getOwnableStorage();
            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 {
            OwnableStorage storage $ = _getOwnableStorage();
            address oldOwner = $._owner;
            $._owner = newOwner;
            emit OwnershipTransferred(oldOwner, newOwner);
        }
    }
    
  • npm/@openzeppelin/contracts-upgradeable@5.6.1/token/ERC721/ERC721Upgradeable.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.6.0) (token/ERC721/ERC721.sol)
    
    pragma solidity ^0.8.24;
    
    import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
    import {IERC721Metadata} from "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
    import {ERC721Utils} from "@openzeppelin/contracts/token/ERC721/utils/ERC721Utils.sol";
    import {ContextUpgradeable} from "../../utils/ContextUpgradeable.sol";
    import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";
    import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
    import {ERC165Upgradeable} from "../../utils/introspection/ERC165Upgradeable.sol";
    import {IERC721Errors} from "@openzeppelin/contracts/interfaces/draft-IERC6093.sol";
    import {Initializable} from "@openzeppelin/contracts/proxy/utils/Initializable.sol";
    
    /**
     * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC-721] Non-Fungible Token Standard, including
     * the Metadata extension, but not including the Enumerable extension, which is available separately as
     * {ERC721Enumerable}.
     */
    abstract contract ERC721Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721, IERC721Metadata, IERC721Errors {
        using Strings for uint256;
    
        /// @custom:storage-location erc7201:openzeppelin.storage.ERC721
        struct ERC721Storage {
            // Token name
            string _name;
    
            // Token symbol
            string _symbol;
    
            mapping(uint256 tokenId => address) _owners;
    
            mapping(address owner => uint256) _balances;
    
            mapping(uint256 tokenId => address) _tokenApprovals;
    
            mapping(address owner => mapping(address operator => bool)) _operatorApprovals;
        }
    
        // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ERC721")) - 1)) & ~bytes32(uint256(0xff))
        bytes32 private constant ERC721StorageLocation = 0x80bb2b638cc20bc4d0a60d66940f3ab4a00c1d7b313497ca82fb0b4ab0079300;
    
        function _getERC721Storage() private pure returns (ERC721Storage storage $) {
            assembly {
                $.slot := ERC721StorageLocation
            }
        }
    
        /**
         * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
         */
        function __ERC721_init(string memory name_, string memory symbol_) internal onlyInitializing {
            __ERC721_init_unchained(name_, symbol_);
        }
    
        function __ERC721_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
            ERC721Storage storage $ = _getERC721Storage();
            $._name = name_;
            $._symbol = symbol_;
        }
    
        /// @inheritdoc IERC165
        function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165) returns (bool) {
            return
                interfaceId == type(IERC721).interfaceId ||
                interfaceId == type(IERC721Metadata).interfaceId ||
                super.supportsInterface(interfaceId);
        }
    
        /// @inheritdoc IERC721
        function balanceOf(address owner) public view virtual returns (uint256) {
            ERC721Storage storage $ = _getERC721Storage();
            if (owner == address(0)) {
                revert ERC721InvalidOwner(address(0));
            }
            return $._balances[owner];
        }
    
        /// @inheritdoc IERC721
        function ownerOf(uint256 tokenId) public view virtual returns (address) {
            return _requireOwned(tokenId);
        }
    
        /// @inheritdoc IERC721Metadata
        function name() public view virtual returns (string memory) {
            ERC721Storage storage $ = _getERC721Storage();
            return $._name;
        }
    
        /// @inheritdoc IERC721Metadata
        function symbol() public view virtual returns (string memory) {
            ERC721Storage storage $ = _getERC721Storage();
            return $._symbol;
        }
    
        /// @inheritdoc IERC721Metadata
        function tokenURI(uint256 tokenId) public view virtual returns (string memory) {
            _requireOwned(tokenId);
    
            string memory baseURI = _baseURI();
            return bytes(baseURI).length > 0 ? string.concat(baseURI, tokenId.toString()) : "";
        }
    
        /**
         * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
         * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
         * by default, can be overridden in child contracts.
         */
        function _baseURI() internal view virtual returns (string memory) {
            return "";
        }
    
        /// @inheritdoc IERC721
        function approve(address to, uint256 tokenId) public virtual {
            _approve(to, tokenId, _msgSender());
        }
    
        /// @inheritdoc IERC721
        function getApproved(uint256 tokenId) public view virtual returns (address) {
            _requireOwned(tokenId);
    
            return _getApproved(tokenId);
        }
    
        /// @inheritdoc IERC721
        function setApprovalForAll(address operator, bool approved) public virtual {
            _setApprovalForAll(_msgSender(), operator, approved);
        }
    
        /// @inheritdoc IERC721
        function isApprovedForAll(address owner, address operator) public view virtual returns (bool) {
            ERC721Storage storage $ = _getERC721Storage();
            return $._operatorApprovals[owner][operator];
        }
    
        /// @inheritdoc IERC721
        function transferFrom(address from, address to, uint256 tokenId) public virtual {
            if (to == address(0)) {
                revert ERC721InvalidReceiver(address(0));
            }
            // Setting an "auth" arguments enables the `_isAuthorized` check which verifies that the token exists
            // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here.
            address previousOwner = _update(to, tokenId, _msgSender());
            if (previousOwner != from) {
                revert ERC721IncorrectOwner(from, tokenId, previousOwner);
            }
        }
    
        /// @inheritdoc IERC721
        function safeTransferFrom(address from, address to, uint256 tokenId) public {
            safeTransferFrom(from, to, tokenId, "");
        }
    
        /// @inheritdoc IERC721
        function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual {
            transferFrom(from, to, tokenId);
            ERC721Utils.checkOnERC721Received(_msgSender(), from, to, tokenId, data);
        }
    
        /**
         * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
         *
         * IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the
         * core ERC-721 logic MUST be matched with the use of {_increaseBalance} to keep balances
         * consistent with ownership. The invariant to preserve is that for any address `a` the value returned by
         * `balanceOf(a)` must be equal to the number of tokens such that `_ownerOf(tokenId)` is `a`.
         */
        function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
            ERC721Storage storage $ = _getERC721Storage();
            return $._owners[tokenId];
        }
    
        /**
         * @dev Returns the approved address for `tokenId`. Returns 0 if `tokenId` is not minted.
         */
        function _getApproved(uint256 tokenId) internal view virtual returns (address) {
            ERC721Storage storage $ = _getERC721Storage();
            return $._tokenApprovals[tokenId];
        }
    
        /**
         * @dev Returns whether `spender` is allowed to manage `owner`'s tokens, or `tokenId` in
         * particular (ignoring whether it is owned by `owner`).
         *
         * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this
         * assumption.
         */
        function _isAuthorized(address owner, address spender, uint256 tokenId) internal view virtual returns (bool) {
            return
                spender != address(0) &&
                (owner == spender || isApprovedForAll(owner, spender) || _getApproved(tokenId) == spender);
        }
    
        /**
         * @dev Checks if `spender` can operate on `tokenId`, assuming the provided `owner` is the actual owner.
         * Reverts if:
         * - `spender` does not have approval from `owner` for `tokenId`.
         * - `spender` does not have approval to manage all of `owner`'s assets.
         *
         * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this
         * assumption.
         */
        function _checkAuthorized(address owner, address spender, uint256 tokenId) internal view virtual {
            if (!_isAuthorized(owner, spender, tokenId)) {
                if (owner == address(0)) {
                    revert ERC721NonexistentToken(tokenId);
                } else {
                    revert ERC721InsufficientApproval(spender, tokenId);
                }
            }
        }
    
        /**
         * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
         *
         * NOTE: the value is limited to type(uint128).max. This protect against _balance overflow. It is unrealistic that
         * a uint256 would ever overflow from increments when these increments are bounded to uint128 values.
         *
         * WARNING: Increasing an account's balance using this function tends to be paired with an override of the
         * {_ownerOf} function to resolve the ownership of the corresponding tokens so that balances and ownership
         * remain consistent with one another.
         */
        function _increaseBalance(address account, uint128 value) internal virtual {
            ERC721Storage storage $ = _getERC721Storage();
            unchecked {
                $._balances[account] += value;
            }
        }
    
        /**
         * @dev Transfers `tokenId` from its current owner to `to`, or alternatively mints (or burns) if the current owner
         * (or `to`) is the zero address. Returns the owner of the `tokenId` before the update.
         *
         * The `auth` argument is optional. If the value passed is non 0, then this function will check that
         * `auth` is either the owner of the token, or approved to operate on the token (by the owner).
         *
         * Emits a {Transfer} event.
         *
         * NOTE: If overriding this function in a way that tracks balances, see also {_increaseBalance}.
         */
        function _update(address to, uint256 tokenId, address auth) internal virtual returns (address) {
            ERC721Storage storage $ = _getERC721Storage();
            address from = _ownerOf(tokenId);
    
            // Perform (optional) operator check
            if (auth != address(0)) {
                _checkAuthorized(from, auth, tokenId);
            }
    
            // Execute the update
            if (from != address(0)) {
                // Clear approval. No need to re-authorize or emit the Approval event
                _approve(address(0), tokenId, address(0), false);
    
                unchecked {
                    $._balances[from] -= 1;
                }
            }
    
            if (to != address(0)) {
                unchecked {
                    $._balances[to] += 1;
                }
            }
    
            $._owners[tokenId] = to;
    
            emit Transfer(from, to, tokenId);
    
            return from;
        }
    
        /**
         * @dev Mints `tokenId` and transfers it to `to`.
         *
         * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
         *
         * Requirements:
         *
         * - `tokenId` must not exist.
         * - `to` cannot be the zero address.
         *
         * Emits a {Transfer} event.
         */
        function _mint(address to, uint256 tokenId) internal {
            if (to == address(0)) {
                revert ERC721InvalidReceiver(address(0));
            }
            address previousOwner = _update(to, tokenId, address(0));
            if (previousOwner != address(0)) {
                revert ERC721InvalidSender(address(0));
            }
        }
    
        /**
         * @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance.
         *
         * Requirements:
         *
         * - `tokenId` must not exist.
         * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
         *
         * Emits a {Transfer} event.
         */
        function _safeMint(address to, uint256 tokenId) internal {
            _safeMint(to, tokenId, "");
        }
    
        /**
         * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
         * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
         */
        function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {
            _mint(to, tokenId);
            ERC721Utils.checkOnERC721Received(_msgSender(), address(0), to, tokenId, data);
        }
    
        /**
         * @dev Destroys `tokenId`.
         * The approval is cleared when the token is burned.
         * This is an internal function that does not check if the sender is authorized to operate on the token.
         *
         * Requirements:
         *
         * - `tokenId` must exist.
         *
         * Emits a {Transfer} event.
         */
        function _burn(uint256 tokenId) internal {
            address previousOwner = _update(address(0), tokenId, address(0));
            if (previousOwner == address(0)) {
                revert ERC721NonexistentToken(tokenId);
            }
        }
    
        /**
         * @dev Transfers `tokenId` from `from` to `to`.
         *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
         *
         * Requirements:
         *
         * - `to` cannot be the zero address.
         * - `tokenId` token must be owned by `from`.
         *
         * Emits a {Transfer} event.
         */
        function _transfer(address from, address to, uint256 tokenId) internal {
            if (to == address(0)) {
                revert ERC721InvalidReceiver(address(0));
            }
            address previousOwner = _update(to, tokenId, address(0));
            if (previousOwner == address(0)) {
                revert ERC721NonexistentToken(tokenId);
            } else if (previousOwner != from) {
                revert ERC721IncorrectOwner(from, tokenId, previousOwner);
            }
        }
    
        /**
         * @dev Safely transfers `tokenId` token from `from` to `to`, checking that contract recipients
         * are aware of the ERC-721 standard to prevent tokens from being forever locked.
         *
         * `data` is additional data, it has no specified format and it is sent in call to `to`.
         *
         * This internal function is like {safeTransferFrom} in the sense that it invokes
         * {IERC721Receiver-onERC721Received} on the receiver, and can be used to e.g.
         * implement alternative mechanisms to perform token transfer, such as signature-based.
         *
         * Requirements:
         *
         * - `tokenId` token must exist and be owned by `from`.
         * - `to` cannot be the zero address.
         * - `from` cannot be the zero address.
         * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
         *
         * Emits a {Transfer} event.
         */
        function _safeTransfer(address from, address to, uint256 tokenId) internal {
            _safeTransfer(from, to, tokenId, "");
        }
    
        /**
         * @dev Same as {xref-ERC721-_safeTransfer-address-address-uint256-}[`_safeTransfer`], with an additional `data` parameter which is
         * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
         */
        function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual {
            _transfer(from, to, tokenId);
            ERC721Utils.checkOnERC721Received(_msgSender(), from, to, tokenId, data);
        }
    
        /**
         * @dev Approve `to` to operate on `tokenId`
         *
         * The `auth` argument is optional. If the value passed is non 0, then this function will check that `auth` is
         * either the owner of the token, or approved to operate on all tokens held by this owner.
         *
         * Emits an {Approval} event.
         *
         * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
         */
        function _approve(address to, uint256 tokenId, address auth) internal {
            _approve(to, tokenId, auth, true);
        }
    
        /**
         * @dev Variant of `_approve` with an optional flag to enable or disable the {Approval} event. The event is not
         * emitted in the context of transfers.
         */
        function _approve(address to, uint256 tokenId, address auth, bool emitEvent) internal virtual {
            ERC721Storage storage $ = _getERC721Storage();
            // Avoid reading the owner unless necessary
            if (emitEvent || auth != address(0)) {
                address owner = _requireOwned(tokenId);
    
                // We do not use _isAuthorized because single-token approvals should not be able to call approve
                if (auth != address(0) && owner != auth && !isApprovedForAll(owner, auth)) {
                    revert ERC721InvalidApprover(auth);
                }
    
                if (emitEvent) {
                    emit Approval(owner, to, tokenId);
                }
            }
    
            $._tokenApprovals[tokenId] = to;
        }
    
        /**
         * @dev Approve `operator` to operate on all of `owner` tokens
         *
         * Requirements:
         * - operator can't be the address zero.
         *
         * Emits an {ApprovalForAll} event.
         */
        function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {
            ERC721Storage storage $ = _getERC721Storage();
            if (owner == address(0)) {
                revert ERC721InvalidApprover(address(0));
            }
            if (operator == address(0)) {
                revert ERC721InvalidOperator(operator);
            }
            $._operatorApprovals[owner][operator] = approved;
            emit ApprovalForAll(owner, operator, approved);
        }
    
        /**
         * @dev Reverts if the `tokenId` doesn't have a current owner (it hasn't been minted, or it has been burned).
         * Returns the owner.
         *
         * Overrides to ownership logic should be done to {_ownerOf}.
         */
        function _requireOwned(uint256 tokenId) internal view returns (address) {
            address owner = _ownerOf(tokenId);
            if (owner == address(0)) {
                revert ERC721NonexistentToken(tokenId);
            }
            return owner;
        }
    }
    
  • npm/@openzeppelin/contracts-upgradeable@5.6.1/token/common/ERC2981Upgradeable.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (token/common/ERC2981.sol)
    
    pragma solidity ^0.8.20;
    
    import {IERC2981} from "@openzeppelin/contracts/interfaces/IERC2981.sol";
    import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
    import {ERC165Upgradeable} from "../../utils/introspection/ERC165Upgradeable.sol";
    import {Initializable} from "@openzeppelin/contracts/proxy/utils/Initializable.sol";
    
    /**
     * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.
     *
     * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for
     * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.
     *
     * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the
     * fee is specified in basis points by default.
     *
     * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See
     * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the ERC. Marketplaces are expected to
     * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.
     */
    abstract contract ERC2981Upgradeable is Initializable, IERC2981, ERC165Upgradeable {
        struct RoyaltyInfo {
            address receiver;
            uint96 royaltyFraction;
        }
    
        /// @custom:storage-location erc7201:openzeppelin.storage.ERC2981
        struct ERC2981Storage {
            RoyaltyInfo _defaultRoyaltyInfo;
            mapping(uint256 tokenId => RoyaltyInfo) _tokenRoyaltyInfo;
        }
    
        // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ERC2981")) - 1)) & ~bytes32(uint256(0xff))
        bytes32 private constant ERC2981StorageLocation = 0xdaedc9ab023613a7caf35e703657e986ccfad7e3eb0af93a2853f8d65dd86b00;
    
        function _getERC2981Storage() private pure returns (ERC2981Storage storage $) {
            assembly {
                $.slot := ERC2981StorageLocation
            }
        }
    
        /**
         * @dev The default royalty set is invalid (eg. (numerator / denominator) >= 1).
         */
        error ERC2981InvalidDefaultRoyalty(uint256 numerator, uint256 denominator);
    
        /**
         * @dev The default royalty receiver is invalid.
         */
        error ERC2981InvalidDefaultRoyaltyReceiver(address receiver);
    
        /**
         * @dev The royalty set for a specific `tokenId` is invalid (eg. (numerator / denominator) >= 1).
         */
        error ERC2981InvalidTokenRoyalty(uint256 tokenId, uint256 numerator, uint256 denominator);
    
        /**
         * @dev The royalty receiver for `tokenId` is invalid.
         */
        error ERC2981InvalidTokenRoyaltyReceiver(uint256 tokenId, address receiver);
    
        function __ERC2981_init() internal onlyInitializing {
        }
    
        function __ERC2981_init_unchained() internal onlyInitializing {
        }
        /// @inheritdoc IERC165
        function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165Upgradeable) returns (bool) {
            return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);
        }
    
        /// @inheritdoc IERC2981
        function royaltyInfo(
            uint256 tokenId,
            uint256 salePrice
        ) public view virtual returns (address receiver, uint256 amount) {
            ERC2981Storage storage $ = _getERC2981Storage();
            RoyaltyInfo storage _royaltyInfo = $._tokenRoyaltyInfo[tokenId];
            address royaltyReceiver = _royaltyInfo.receiver;
            uint96 royaltyFraction = _royaltyInfo.royaltyFraction;
    
            if (royaltyReceiver == address(0)) {
                royaltyReceiver = $._defaultRoyaltyInfo.receiver;
                royaltyFraction = $._defaultRoyaltyInfo.royaltyFraction;
            }
    
            uint256 royaltyAmount = (salePrice * royaltyFraction) / _feeDenominator();
    
            return (royaltyReceiver, royaltyAmount);
        }
    
        /**
         * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a
         * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an
         * override.
         */
        function _feeDenominator() internal pure virtual returns (uint96) {
            return 10000;
        }
    
        /**
         * @dev Sets the royalty information that all ids in this contract will default to.
         *
         * Requirements:
         *
         * - `receiver` cannot be the zero address.
         * - `feeNumerator` cannot be greater than the fee denominator.
         */
        function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual {
            ERC2981Storage storage $ = _getERC2981Storage();
            uint256 denominator = _feeDenominator();
            if (feeNumerator > denominator) {
                // Royalty fee will exceed the sale price
                revert ERC2981InvalidDefaultRoyalty(feeNumerator, denominator);
            }
            if (receiver == address(0)) {
                revert ERC2981InvalidDefaultRoyaltyReceiver(address(0));
            }
    
            $._defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator);
        }
    
        /**
         * @dev Removes default royalty information.
         */
        function _deleteDefaultRoyalty() internal virtual {
            ERC2981Storage storage $ = _getERC2981Storage();
            delete $._defaultRoyaltyInfo;
        }
    
        /**
         * @dev Sets the royalty information for a specific token id, overriding the global default.
         *
         * Requirements:
         *
         * - `receiver` cannot be the zero address.
         * - `feeNumerator` cannot be greater than the fee denominator.
         */
        function _setTokenRoyalty(uint256 tokenId, address receiver, uint96 feeNumerator) internal virtual {
            ERC2981Storage storage $ = _getERC2981Storage();
            uint256 denominator = _feeDenominator();
            if (feeNumerator > denominator) {
                // Royalty fee will exceed the sale price
                revert ERC2981InvalidTokenRoyalty(tokenId, feeNumerator, denominator);
            }
            if (receiver == address(0)) {
                revert ERC2981InvalidTokenRoyaltyReceiver(tokenId, address(0));
            }
    
            $._tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator);
        }
    
        /**
         * @dev Resets royalty information for the token id back to the global default.
         */
        function _resetTokenRoyalty(uint256 tokenId) internal virtual {
            ERC2981Storage storage $ = _getERC2981Storage();
            delete $._tokenRoyaltyInfo[tokenId];
        }
    }
    
  • npm/@openzeppelin/contracts-upgradeable@5.6.1/utils/ContextUpgradeable.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
    
    pragma solidity ^0.8.20;
    import {Initializable} from "@openzeppelin/contracts/proxy/utils/Initializable.sol";
    
    /**
     * @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 ContextUpgradeable is Initializable {
        function __Context_init() internal onlyInitializing {
        }
    
        function __Context_init_unchained() internal onlyInitializing {
        }
        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;
        }
    }
    
  • npm/@openzeppelin/contracts-upgradeable@5.6.1/utils/introspection/ERC165Upgradeable.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/ERC165.sol)
    
    pragma solidity ^0.8.20;
    
    import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
    import {Initializable} from "@openzeppelin/contracts/proxy/utils/Initializable.sol";
    
    /**
     * @dev Implementation of the {IERC165} interface.
     *
     * Contracts that want to implement ERC-165 should inherit from this contract and override {supportsInterface} to check
     * for the additional interface id that will be supported. For example:
     *
     * ```solidity
     * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
     *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
     * }
     * ```
     */
    abstract contract ERC165Upgradeable is Initializable, IERC165 {
        function __ERC165_init() internal onlyInitializing {
        }
    
        function __ERC165_init_unchained() internal onlyInitializing {
        }
        /// @inheritdoc IERC165
        function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
            return interfaceId == type(IERC165).interfaceId;
        }
    }
    
  • npm/@openzeppelin/contracts@5.6.1/interfaces/IERC2981.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC2981.sol)
    
    pragma solidity >=0.6.2;
    
    import {IERC165} from "../utils/introspection/IERC165.sol";
    
    /**
     * @dev Interface for the NFT Royalty Standard.
     *
     * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
     * support for royalty payments across all NFT marketplaces and ecosystem participants.
     */
    interface IERC2981 is IERC165 {
        /**
         * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
         * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
         *
         * NOTE: ERC-2981 allows setting the royalty to 100% of the price. In that case all the price would be sent to the
         * royalty receiver and 0 tokens to the seller. Contracts dealing with royalty should consider empty transfers.
         */
        function royaltyInfo(
            uint256 tokenId,
            uint256 salePrice
        ) external view returns (address receiver, uint256 royaltyAmount);
    }
    
  • npm/@openzeppelin/contracts@5.6.1/interfaces/draft-IERC6093.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.5.0) (interfaces/draft-IERC6093.sol)
    
    pragma solidity >=0.8.4;
    
    /**
     * @dev Standard ERC-20 Errors
     * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens.
     */
    interface IERC20Errors {
        /**
         * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
         * @param sender Address whose tokens are being transferred.
         * @param balance Current balance for the interacting account.
         * @param needed Minimum amount required to perform a transfer.
         */
        error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);
    
        /**
         * @dev Indicates a failure with the token `sender`. Used in transfers.
         * @param sender Address whose tokens are being transferred.
         */
        error ERC20InvalidSender(address sender);
    
        /**
         * @dev Indicates a failure with the token `receiver`. Used in transfers.
         * @param receiver Address to which tokens are being transferred.
         */
        error ERC20InvalidReceiver(address receiver);
    
        /**
         * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
         * @param spender Address that may be allowed to operate on tokens without being their owner.
         * @param allowance Amount of tokens a `spender` is allowed to operate with.
         * @param needed Minimum amount required to perform a transfer.
         */
        error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);
    
        /**
         * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
         * @param approver Address initiating an approval operation.
         */
        error ERC20InvalidApprover(address approver);
    
        /**
         * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
         * @param spender Address that may be allowed to operate on tokens without being their owner.
         */
        error ERC20InvalidSpender(address spender);
    }
    
    /**
     * @dev Standard ERC-721 Errors
     * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens.
     */
    interface IERC721Errors {
        /**
         * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-721.
         * Used in balance queries.
         * @param owner Address of the current owner of a token.
         */
        error ERC721InvalidOwner(address owner);
    
        /**
         * @dev Indicates a `tokenId` whose `owner` is the zero address.
         * @param tokenId Identifier number of a token.
         */
        error ERC721NonexistentToken(uint256 tokenId);
    
        /**
         * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
         * @param sender Address whose tokens are being transferred.
         * @param tokenId Identifier number of a token.
         * @param owner Address of the current owner of a token.
         */
        error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);
    
        /**
         * @dev Indicates a failure with the token `sender`. Used in transfers.
         * @param sender Address whose tokens are being transferred.
         */
        error ERC721InvalidSender(address sender);
    
        /**
         * @dev Indicates a failure with the token `receiver`. Used in transfers.
         * @param receiver Address to which tokens are being transferred.
         */
        error ERC721InvalidReceiver(address receiver);
    
        /**
         * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
         * @param operator Address that may be allowed to operate on tokens without being their owner.
         * @param tokenId Identifier number of a token.
         */
        error ERC721InsufficientApproval(address operator, uint256 tokenId);
    
        /**
         * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
         * @param approver Address initiating an approval operation.
         */
        error ERC721InvalidApprover(address approver);
    
        /**
         * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
         * @param operator Address that may be allowed to operate on tokens without being their owner.
         */
        error ERC721InvalidOperator(address operator);
    }
    
    /**
     * @dev Standard ERC-1155 Errors
     * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens.
     */
    interface IERC1155Errors {
        /**
         * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
         * @param sender Address whose tokens are being transferred.
         * @param balance Current balance for the interacting account.
         * @param needed Minimum amount required to perform a transfer.
         * @param tokenId Identifier number of a token.
         */
        error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);
    
        /**
         * @dev Indicates a failure with the token `sender`. Used in transfers.
         * @param sender Address whose tokens are being transferred.
         */
        error ERC1155InvalidSender(address sender);
    
        /**
         * @dev Indicates a failure with the token `receiver`. Used in transfers.
         * @param receiver Address to which tokens are being transferred.
         */
        error ERC1155InvalidReceiver(address receiver);
    
        /**
         * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
         * @param operator Address that may be allowed to operate on tokens without being their owner.
         * @param owner Address of the current owner of a token.
         */
        error ERC1155MissingApprovalForAll(address operator, address owner);
    
        /**
         * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
         * @param approver Address initiating an approval operation.
         */
        error ERC1155InvalidApprover(address approver);
    
        /**
         * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
         * @param operator Address that may be allowed to operate on tokens without being their owner.
         */
        error ERC1155InvalidOperator(address operator);
    
        /**
         * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
         * Used in batch transfers.
         * @param idsLength Length of the array of token identifiers
         * @param valuesLength Length of the array of token amounts
         */
        error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
    }
    
  • npm/@openzeppelin/contracts@5.6.1/proxy/utils/Initializable.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.3.0) (proxy/utils/Initializable.sol)
    
    pragma solidity ^0.8.20;
    
    /**
     * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
     * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
     * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
     * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
     *
     * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
     * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
     * case an upgrade adds a module that needs to be initialized.
     *
     * For example:
     *
     * [.hljs-theme-light.nopadding]
     * ```solidity
     * contract MyToken is ERC20Upgradeable {
     *     function initialize() initializer public {
     *         __ERC20_init("MyToken", "MTK");
     *     }
     * }
     *
     * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
     *     function initializeV2() reinitializer(2) public {
     *         __ERC20Permit_init("MyToken");
     *     }
     * }
     * ```
     *
     * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
     * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
     *
     * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
     * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
     *
     * [CAUTION]
     * ====
     * Avoid leaving a contract uninitialized.
     *
     * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
     * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
     * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
     *
     * [.hljs-theme-light.nopadding]
     * ```
     * /// @custom:oz-upgrades-unsafe-allow constructor
     * constructor() {
     *     _disableInitializers();
     * }
     * ```
     * ====
     */
    abstract contract Initializable {
        /**
         * @dev Storage of the initializable contract.
         *
         * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
         * when using with upgradeable contracts.
         *
         * @custom:storage-location erc7201:openzeppelin.storage.Initializable
         */
        struct InitializableStorage {
            /**
             * @dev Indicates that the contract has been initialized.
             */
            uint64 _initialized;
            /**
             * @dev Indicates that the contract is in the process of being initialized.
             */
            bool _initializing;
        }
    
        // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
        bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;
    
        /**
         * @dev The contract is already initialized.
         */
        error InvalidInitialization();
    
        /**
         * @dev The contract is not initializing.
         */
        error NotInitializing();
    
        /**
         * @dev Triggered when the contract has been initialized or reinitialized.
         */
        event Initialized(uint64 version);
    
        /**
         * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
         * `onlyInitializing` functions can be used to initialize parent contracts.
         *
         * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any
         * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
         * production.
         *
         * Emits an {Initialized} event.
         */
        modifier initializer() {
            // solhint-disable-next-line var-name-mixedcase
            InitializableStorage storage $ = _getInitializableStorage();
    
            // Cache values to avoid duplicated sloads
            bool isTopLevelCall = !$._initializing;
            uint64 initialized = $._initialized;
    
            // Allowed calls:
            // - initialSetup: the contract is not in the initializing state and no previous version was
            //                 initialized
            // - construction: the contract is initialized at version 1 (no reinitialization) and the
            //                 current contract is just being deployed
            bool initialSetup = initialized == 0 && isTopLevelCall;
            bool construction = initialized == 1 && address(this).code.length == 0;
    
            if (!initialSetup && !construction) {
                revert InvalidInitialization();
            }
            $._initialized = 1;
            if (isTopLevelCall) {
                $._initializing = true;
            }
            _;
            if (isTopLevelCall) {
                $._initializing = false;
                emit Initialized(1);
            }
        }
    
        /**
         * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
         * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
         * used to initialize parent contracts.
         *
         * A reinitializer may be used after the original initialization step. This is essential to configure modules that
         * are added through upgrades and that require initialization.
         *
         * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
         * cannot be nested. If one is invoked in the context of another, execution will revert.
         *
         * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
         * a contract, executing them in the right order is up to the developer or operator.
         *
         * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization.
         *
         * Emits an {Initialized} event.
         */
        modifier reinitializer(uint64 version) {
            // solhint-disable-next-line var-name-mixedcase
            InitializableStorage storage $ = _getInitializableStorage();
    
            if ($._initializing || $._initialized >= version) {
                revert InvalidInitialization();
            }
            $._initialized = version;
            $._initializing = true;
            _;
            $._initializing = false;
            emit Initialized(version);
        }
    
        /**
         * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
         * {initializer} and {reinitializer} modifiers, directly or indirectly.
         */
        modifier onlyInitializing() {
            _checkInitializing();
            _;
        }
    
        /**
         * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
         */
        function _checkInitializing() internal view virtual {
            if (!_isInitializing()) {
                revert NotInitializing();
            }
        }
    
        /**
         * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
         * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
         * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
         * through proxies.
         *
         * Emits an {Initialized} event the first time it is successfully executed.
         */
        function _disableInitializers() internal virtual {
            // solhint-disable-next-line var-name-mixedcase
            InitializableStorage storage $ = _getInitializableStorage();
    
            if ($._initializing) {
                revert InvalidInitialization();
            }
            if ($._initialized != type(uint64).max) {
                $._initialized = type(uint64).max;
                emit Initialized(type(uint64).max);
            }
        }
    
        /**
         * @dev Returns the highest version that has been initialized. See {reinitializer}.
         */
        function _getInitializedVersion() internal view returns (uint64) {
            return _getInitializableStorage()._initialized;
        }
    
        /**
         * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
         */
        function _isInitializing() internal view returns (bool) {
            return _getInitializableStorage()._initializing;
        }
    
        /**
         * @dev Pointer to storage slot. Allows integrators to override it with a custom storage location.
         *
         * NOTE: Consider following the ERC-7201 formula to derive storage locations.
         */
        function _initializableStorageSlot() internal pure virtual returns (bytes32) {
            return INITIALIZABLE_STORAGE;
        }
    
        /**
         * @dev Returns a pointer to the storage namespace.
         */
        // solhint-disable-next-line var-name-mixedcase
        function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
            bytes32 slot = _initializableStorageSlot();
            assembly {
                $.slot := slot
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.6.1/token/ERC721/IERC721.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/IERC721.sol)
    
    pragma solidity >=0.6.2;
    
    import {IERC165} from "../../utils/introspection/IERC165.sol";
    
    /**
     * @dev Required interface of an ERC-721 compliant contract.
     */
    interface IERC721 is IERC165 {
        /**
         * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
         */
        event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
    
        /**
         * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
         */
        event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
    
        /**
         * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
         */
        event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
    
        /**
         * @dev Returns the number of tokens in ``owner``'s account.
         */
        function balanceOf(address owner) external view returns (uint256 balance);
    
        /**
         * @dev Returns the owner of the `tokenId` token.
         *
         * Requirements:
         *
         * - `tokenId` must exist.
         */
        function ownerOf(uint256 tokenId) external view returns (address owner);
    
        /**
         * @dev Safely transfers `tokenId` token from `from` to `to`.
         *
         * Requirements:
         *
         * - `from` cannot be the zero address.
         * - `to` cannot be the zero address.
         * - `tokenId` token must exist and be owned by `from`.
         * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
         * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon
         *   a safe transfer.
         *
         * Emits a {Transfer} event.
         */
        function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
    
        /**
         * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
         * are aware of the ERC-721 protocol to prevent tokens from being forever locked.
         *
         * Requirements:
         *
         * - `from` cannot be the zero address.
         * - `to` cannot be the zero address.
         * - `tokenId` token must exist and be owned by `from`.
         * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or
         *   {setApprovalForAll}.
         * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon
         *   a safe transfer.
         *
         * Emits a {Transfer} event.
         */
        function safeTransferFrom(address from, address to, uint256 tokenId) external;
    
        /**
         * @dev Transfers `tokenId` token from `from` to `to`.
         *
         * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC-721
         * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
         * understand this adds an external call which potentially creates a reentrancy vulnerability.
         *
         * Requirements:
         *
         * - `from` cannot be the zero address.
         * - `to` cannot be the zero address.
         * - `tokenId` token must be owned by `from`.
         * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
         *
         * Emits a {Transfer} event.
         */
        function transferFrom(address from, address to, uint256 tokenId) external;
    
        /**
         * @dev Gives permission to `to` to transfer `tokenId` token to another account.
         * The approval is cleared when the token is transferred.
         *
         * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
         *
         * Requirements:
         *
         * - The caller must own the token or be an approved operator.
         * - `tokenId` must exist.
         *
         * Emits an {Approval} event.
         */
        function approve(address to, uint256 tokenId) external;
    
        /**
         * @dev Approve or remove `operator` as an operator for the caller.
         * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
         *
         * Requirements:
         *
         * - The `operator` cannot be the address zero.
         *
         * Emits an {ApprovalForAll} event.
         */
        function setApprovalForAll(address operator, bool approved) external;
    
        /**
         * @dev Returns the account approved for `tokenId` token.
         *
         * Requirements:
         *
         * - `tokenId` must exist.
         */
        function getApproved(uint256 tokenId) external view returns (address operator);
    
        /**
         * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
         *
         * See {setApprovalForAll}
         */
        function isApprovedForAll(address owner, address operator) external view returns (bool);
    }
    
  • npm/@openzeppelin/contracts@5.6.1/token/ERC721/IERC721Receiver.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/IERC721Receiver.sol)
    
    pragma solidity >=0.5.0;
    
    /**
     * @title ERC-721 token receiver interface
     * @dev Interface for any contract that wants to support safeTransfers
     * from ERC-721 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);
    }
    
  • npm/@openzeppelin/contracts@5.6.1/token/ERC721/extensions/IERC721Metadata.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/extensions/IERC721Metadata.sol)
    
    pragma solidity >=0.6.2;
    
    import {IERC721} from "../IERC721.sol";
    
    /**
     * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
     * @dev See https://eips.ethereum.org/EIPS/eip-721
     */
    interface IERC721Metadata is IERC721 {
        /**
         * @dev Returns the token collection name.
         */
        function name() external view returns (string memory);
    
        /**
         * @dev Returns the token collection symbol.
         */
        function symbol() external view returns (string memory);
    
        /**
         * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
         */
        function tokenURI(uint256 tokenId) external view returns (string memory);
    }
    
  • npm/@openzeppelin/contracts@5.6.1/token/ERC721/utils/ERC721Utils.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.5.0) (token/ERC721/utils/ERC721Utils.sol)
    
    pragma solidity ^0.8.20;
    
    import {IERC721Receiver} from "../IERC721Receiver.sol";
    import {IERC721Errors} from "../../../interfaces/draft-IERC6093.sol";
    
    /**
     * @dev Library that provides common ERC-721 utility functions.
     *
     * See https://eips.ethereum.org/EIPS/eip-721[ERC-721].
     *
     * _Available since v5.1._
     */
    library ERC721Utils {
        /**
         * @dev Performs an acceptance check for the provided `operator` by calling {IERC721Receiver-onERC721Received}
         * on the `to` address. The `operator` is generally the address that initiated the token transfer (i.e. `msg.sender`).
         *
         * The acceptance call is not executed and treated as a no-op if the target address doesn't contain code (i.e. an EOA).
         * Otherwise, the recipient must implement {IERC721Receiver-onERC721Received} and return the acceptance magic value to accept
         * the transfer.
         */
        function checkOnERC721Received(
            address operator,
            address from,
            address to,
            uint256 tokenId,
            bytes memory data
        ) internal {
            if (to.code.length > 0) {
                try IERC721Receiver(to).onERC721Received(operator, from, tokenId, data) returns (bytes4 retval) {
                    if (retval != IERC721Receiver.onERC721Received.selector) {
                        // Token rejected
                        revert IERC721Errors.ERC721InvalidReceiver(to);
                    }
                } catch (bytes memory reason) {
                    if (reason.length == 0) {
                        // non-IERC721Receiver implementer
                        revert IERC721Errors.ERC721InvalidReceiver(to);
                    } else {
                        assembly ("memory-safe") {
                            revert(add(reason, 0x20), mload(reason))
                        }
                    }
                }
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.6.1/utils/Bytes.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.6.0) (utils/Bytes.sol)
    
    pragma solidity ^0.8.24;
    
    import {Math} from "./math/Math.sol";
    
    /**
     * @dev Bytes operations.
     */
    library Bytes {
        /**
         * @dev Forward search for `s` in `buffer`
         * * If `s` is present in the buffer, returns the index of the first instance
         * * If `s` is not present in the buffer, returns type(uint256).max
         *
         * NOTE: replicates the behavior of https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf[Javascript's `Array.indexOf`]
         */
        function indexOf(bytes memory buffer, bytes1 s) internal pure returns (uint256) {
            return indexOf(buffer, s, 0);
        }
    
        /**
         * @dev Forward search for `s` in `buffer` starting at position `pos`
         * * If `s` is present in the buffer (at or after `pos`), returns the index of the next instance
         * * If `s` is not present in the buffer (at or after `pos`), returns type(uint256).max
         *
         * NOTE: replicates the behavior of https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf[Javascript's `Array.indexOf`]
         */
        function indexOf(bytes memory buffer, bytes1 s, uint256 pos) internal pure returns (uint256) {
            uint256 length = buffer.length;
            for (uint256 i = pos; i < length; ++i) {
                if (bytes1(_unsafeReadBytesOffset(buffer, i)) == s) {
                    return i;
                }
            }
            return type(uint256).max;
        }
    
        /**
         * @dev Backward search for `s` in `buffer`
         * * If `s` is present in the buffer, returns the index of the last instance
         * * If `s` is not present in the buffer, returns type(uint256).max
         *
         * NOTE: replicates the behavior of https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/lastIndexOf[Javascript's `Array.lastIndexOf`]
         */
        function lastIndexOf(bytes memory buffer, bytes1 s) internal pure returns (uint256) {
            return lastIndexOf(buffer, s, type(uint256).max);
        }
    
        /**
         * @dev Backward search for `s` in `buffer` starting at position `pos`
         * * If `s` is present in the buffer (at or before `pos`), returns the index of the previous instance
         * * If `s` is not present in the buffer (at or before `pos`), returns type(uint256).max
         *
         * NOTE: replicates the behavior of https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/lastIndexOf[Javascript's `Array.lastIndexOf`]
         */
        function lastIndexOf(bytes memory buffer, bytes1 s, uint256 pos) internal pure returns (uint256) {
            unchecked {
                uint256 length = buffer.length;
                for (uint256 i = Math.min(Math.saturatingAdd(pos, 1), length); i > 0; --i) {
                    if (bytes1(_unsafeReadBytesOffset(buffer, i - 1)) == s) {
                        return i - 1;
                    }
                }
                return type(uint256).max;
            }
        }
    
        /**
         * @dev Copies the content of `buffer`, from `start` (included) to the end of `buffer` into a new bytes object in
         * memory.
         *
         * NOTE: replicates the behavior of https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice[Javascript's `Array.slice`]
         */
        function slice(bytes memory buffer, uint256 start) internal pure returns (bytes memory) {
            return slice(buffer, start, buffer.length);
        }
    
        /**
         * @dev Copies the content of `buffer`, from `start` (included) to `end` (excluded) into a new bytes object in
         * memory. The `end` argument is truncated to the length of the `buffer`.
         *
         * NOTE: replicates the behavior of https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice[Javascript's `Array.slice`]
         */
        function slice(bytes memory buffer, uint256 start, uint256 end) internal pure returns (bytes memory) {
            // sanitize
            end = Math.min(end, buffer.length);
            start = Math.min(start, end);
    
            // allocate and copy
            bytes memory result = new bytes(end - start);
            assembly ("memory-safe") {
                mcopy(add(result, 0x20), add(add(buffer, 0x20), start), sub(end, start))
            }
    
            return result;
        }
    
        /**
         * @dev Moves the content of `buffer`, from `start` (included) to the end of `buffer` to the start of that buffer,
         * and shrinks the buffer length accordingly, effectively overriding the content of buffer with buffer[start:].
         *
         * NOTE: This function modifies the provided buffer in place. If you need to preserve the original buffer, use {slice} instead
         */
        function splice(bytes memory buffer, uint256 start) internal pure returns (bytes memory) {
            return splice(buffer, start, buffer.length);
        }
    
        /**
         * @dev Moves the content of `buffer`, from `start` (included) to `end` (excluded) to the start of that buffer,
         * and shrinks the buffer length accordingly, effectively overriding the content of buffer with buffer[start:end].
         * The `end` argument is truncated to the length of the `buffer`.
         *
         * NOTE: This function modifies the provided buffer in place. If you need to preserve the original buffer, use {slice} instead
         */
        function splice(bytes memory buffer, uint256 start, uint256 end) internal pure returns (bytes memory) {
            // sanitize
            end = Math.min(end, buffer.length);
            start = Math.min(start, end);
    
            // move and resize
            assembly ("memory-safe") {
                mcopy(add(buffer, 0x20), add(add(buffer, 0x20), start), sub(end, start))
                mstore(buffer, sub(end, start))
            }
    
            return buffer;
        }
    
        /**
         * @dev Replaces bytes in `buffer` starting at `pos` with all bytes from `replacement`.
         *
         * Parameters are clamped to valid ranges (i.e. `pos` is clamped to `[0, buffer.length]`).
         * If `pos >= buffer.length`, no replacement occurs and the buffer is returned unchanged.
         *
         * NOTE: This function modifies the provided buffer in place.
         */
        function replace(bytes memory buffer, uint256 pos, bytes memory replacement) internal pure returns (bytes memory) {
            return replace(buffer, pos, replacement, 0, replacement.length);
        }
    
        /**
         * @dev Replaces bytes in `buffer` starting at `pos` with bytes from `replacement` starting at `offset`.
         * Copies at most `length` bytes from `replacement` to `buffer`.
         *
         * Parameters are clamped to valid ranges (i.e. `pos` is clamped to `[0, buffer.length]`, `offset` is
         * clamped to `[0, replacement.length]`, and `length` is clamped to `min(length, replacement.length - offset,
         * buffer.length - pos))`. If `pos >= buffer.length` or `offset >= replacement.length`, no replacement occurs
         * and the buffer is returned unchanged.
         *
         * NOTE: This function modifies the provided buffer in place.
         */
        function replace(
            bytes memory buffer,
            uint256 pos,
            bytes memory replacement,
            uint256 offset,
            uint256 length
        ) internal pure returns (bytes memory) {
            // sanitize
            pos = Math.min(pos, buffer.length);
            offset = Math.min(offset, replacement.length);
            length = Math.min(length, Math.min(replacement.length - offset, buffer.length - pos));
    
            // replace
            assembly ("memory-safe") {
                mcopy(add(add(buffer, 0x20), pos), add(add(replacement, 0x20), offset), length)
            }
    
            return buffer;
        }
    
        /**
         * @dev Concatenate an array of bytes into a single bytes object.
         *
         * For fixed bytes types, we recommend using the solidity built-in `bytes.concat` or (equivalent)
         * `abi.encodePacked`.
         *
         * NOTE: this could be done in assembly with a single loop that expands starting at the FMP, but that would be
         * significantly less readable. It might be worth benchmarking the savings of the full-assembly approach.
         */
        function concat(bytes[] memory buffers) internal pure returns (bytes memory) {
            uint256 length = 0;
            for (uint256 i = 0; i < buffers.length; ++i) {
                length += buffers[i].length;
            }
    
            bytes memory result = new bytes(length);
    
            uint256 offset = 0x20;
            for (uint256 i = 0; i < buffers.length; ++i) {
                bytes memory input = buffers[i];
                assembly ("memory-safe") {
                    mcopy(add(result, offset), add(input, 0x20), mload(input))
                }
                unchecked {
                    offset += input.length;
                }
            }
    
            return result;
        }
    
        /**
         * @dev Split each byte in `input` into two nibbles (4 bits each)
         *
         * Example: hex"01234567" → hex"0001020304050607"
         */
        function toNibbles(bytes memory input) internal pure returns (bytes memory output) {
            assembly ("memory-safe") {
                let length := mload(input)
                output := mload(0x40)
                mstore(0x40, add(add(output, 0x20), mul(length, 2)))
                mstore(output, mul(length, 2))
                for {
                    let i := 0
                } lt(i, length) {
                    i := add(i, 0x10)
                } {
                    let chunk := shr(128, mload(add(add(input, 0x20), i)))
                    chunk := and(
                        0x0000000000000000ffffffffffffffff0000000000000000ffffffffffffffff,
                        or(shl(64, chunk), chunk)
                    )
                    chunk := and(
                        0x00000000ffffffff00000000ffffffff00000000ffffffff00000000ffffffff,
                        or(shl(32, chunk), chunk)
                    )
                    chunk := and(
                        0x0000ffff0000ffff0000ffff0000ffff0000ffff0000ffff0000ffff0000ffff,
                        or(shl(16, chunk), chunk)
                    )
                    chunk := and(
                        0x00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff,
                        or(shl(8, chunk), chunk)
                    )
                    chunk := and(
                        0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f,
                        or(shl(4, chunk), chunk)
                    )
                    mstore(add(add(output, 0x20), mul(i, 2)), chunk)
                }
            }
        }
    
        /**
         * @dev Returns true if the two byte buffers are equal.
         */
        function equal(bytes memory a, bytes memory b) internal pure returns (bool) {
            return a.length == b.length && keccak256(a) == keccak256(b);
        }
    
        /**
         * @dev Reverses the byte order of a bytes32 value, converting between little-endian and big-endian.
         * Inspired by https://graphics.stanford.edu/~seander/bithacks.html#ReverseParallel[Reverse Parallel]
         */
        function reverseBytes32(bytes32 value) internal pure returns (bytes32) {
            value = // swap bytes
                ((value >> 8) & 0x00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF) |
                ((value & 0x00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF00FF) << 8);
            value = // swap 2-byte long pairs
                ((value >> 16) & 0x0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF) |
                ((value & 0x0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF0000FFFF) << 16);
            value = // swap 4-byte long pairs
                ((value >> 32) & 0x00000000FFFFFFFF00000000FFFFFFFF00000000FFFFFFFF00000000FFFFFFFF) |
                ((value & 0x00000000FFFFFFFF00000000FFFFFFFF00000000FFFFFFFF00000000FFFFFFFF) << 32);
            value = // swap 8-byte long pairs
                ((value >> 64) & 0x0000000000000000FFFFFFFFFFFFFFFF0000000000000000FFFFFFFFFFFFFFFF) |
                ((value & 0x0000000000000000FFFFFFFFFFFFFFFF0000000000000000FFFFFFFFFFFFFFFF) << 64);
            return (value >> 128) | (value << 128); // swap 16-byte long pairs
        }
    
        /// @dev Same as {reverseBytes32} but optimized for 128-bit values.
        function reverseBytes16(bytes16 value) internal pure returns (bytes16) {
            value = // swap bytes
                ((value & 0xFF00FF00FF00FF00FF00FF00FF00FF00) >> 8) |
                ((value & 0x00FF00FF00FF00FF00FF00FF00FF00FF) << 8);
            value = // swap 2-byte long pairs
                ((value & 0xFFFF0000FFFF0000FFFF0000FFFF0000) >> 16) |
                ((value & 0x0000FFFF0000FFFF0000FFFF0000FFFF) << 16);
            value = // swap 4-byte long pairs
                ((value & 0xFFFFFFFF00000000FFFFFFFF00000000) >> 32) |
                ((value & 0x00000000FFFFFFFF00000000FFFFFFFF) << 32);
            return (value >> 64) | (value << 64); // swap 8-byte long pairs
        }
    
        /// @dev Same as {reverseBytes32} but optimized for 64-bit values.
        function reverseBytes8(bytes8 value) internal pure returns (bytes8) {
            value = ((value & 0xFF00FF00FF00FF00) >> 8) | ((value & 0x00FF00FF00FF00FF) << 8); // swap bytes
            value = ((value & 0xFFFF0000FFFF0000) >> 16) | ((value & 0x0000FFFF0000FFFF) << 16); // swap 2-byte long pairs
            return (value >> 32) | (value << 32); // swap 4-byte long pairs
        }
    
        /// @dev Same as {reverseBytes32} but optimized for 32-bit values.
        function reverseBytes4(bytes4 value) internal pure returns (bytes4) {
            value = ((value & 0xFF00FF00) >> 8) | ((value & 0x00FF00FF) << 8); // swap bytes
            return (value >> 16) | (value << 16); // swap 2-byte long pairs
        }
    
        /// @dev Same as {reverseBytes32} but optimized for 16-bit values.
        function reverseBytes2(bytes2 value) internal pure returns (bytes2) {
            return (value >> 8) | (value << 8);
        }
    
        /**
         * @dev Counts the number of leading zero bits a bytes array. Returns `8 * buffer.length`
         * if the buffer is all zeros.
         */
        function clz(bytes memory buffer) internal pure returns (uint256) {
            for (uint256 i = 0; i < buffer.length; i += 0x20) {
                bytes32 chunk = _unsafeReadBytesOffset(buffer, i);
                if (chunk != bytes32(0)) {
                    return Math.min(8 * i + Math.clz(uint256(chunk)), 8 * buffer.length);
                }
            }
            return 8 * buffer.length;
        }
    
        /**
         * @dev Reads a bytes32 from a bytes array without bounds checking.
         *
         * NOTE: making this function internal would mean it could be used with memory unsafe offset, and marking the
         * assembly block as such would prevent some optimizations.
         */
        function _unsafeReadBytesOffset(bytes memory buffer, uint256 offset) private pure returns (bytes32 value) {
            // This is not memory safe in the general case, but all calls to this private function are within bounds.
            assembly ("memory-safe") {
                value := mload(add(add(buffer, 0x20), offset))
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.6.1/utils/Panic.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.1.0) (utils/Panic.sol)
    
    pragma solidity ^0.8.20;
    
    /**
     * @dev Helper library for emitting standardized panic codes.
     *
     * ```solidity
     * contract Example {
     *      using Panic for uint256;
     *
     *      // Use any of the declared internal constants
     *      function foo() { Panic.GENERIC.panic(); }
     *
     *      // Alternatively
     *      function foo() { Panic.panic(Panic.GENERIC); }
     * }
     * ```
     *
     * Follows the list from https://github.com/ethereum/solidity/blob/v0.8.24/libsolutil/ErrorCodes.h[libsolutil].
     *
     * _Available since v5.1._
     */
    // slither-disable-next-line unused-state
    library Panic {
        /// @dev generic / unspecified error
        uint256 internal constant GENERIC = 0x00;
        /// @dev used by the assert() builtin
        uint256 internal constant ASSERT = 0x01;
        /// @dev arithmetic underflow or overflow
        uint256 internal constant UNDER_OVERFLOW = 0x11;
        /// @dev division or modulo by zero
        uint256 internal constant DIVISION_BY_ZERO = 0x12;
        /// @dev enum conversion error
        uint256 internal constant ENUM_CONVERSION_ERROR = 0x21;
        /// @dev invalid encoding in storage
        uint256 internal constant STORAGE_ENCODING_ERROR = 0x22;
        /// @dev empty array pop
        uint256 internal constant EMPTY_ARRAY_POP = 0x31;
        /// @dev array out of bounds access
        uint256 internal constant ARRAY_OUT_OF_BOUNDS = 0x32;
        /// @dev resource error (too large allocation or too large array)
        uint256 internal constant RESOURCE_ERROR = 0x41;
        /// @dev calling invalid internal function
        uint256 internal constant INVALID_INTERNAL_FUNCTION = 0x51;
    
        /// @dev Reverts with a panic code. Recommended to use with
        /// the internal constants with predefined codes.
        function panic(uint256 code) internal pure {
            assembly ("memory-safe") {
                mstore(0x00, 0x4e487b71)
                mstore(0x20, code)
                revert(0x1c, 0x24)
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.6.1/utils/ReentrancyGuard.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.5.0) (utils/ReentrancyGuard.sol)
    
    pragma solidity ^0.8.20;
    
    import {StorageSlot} from "./StorageSlot.sol";
    
    /**
     * @dev Contract module that helps prevent reentrant calls to a function.
     *
     * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
     * available, which can be applied to functions to make sure there are no nested
     * (reentrant) calls to them.
     *
     * Note that because there is a single `nonReentrant` guard, functions marked as
     * `nonReentrant` may not call one another. This can be worked around by making
     * those functions `private`, and then adding `external` `nonReentrant` entry
     * points to them.
     *
     * TIP: If EIP-1153 (transient storage) is available on the chain you're deploying at,
     * consider using {ReentrancyGuardTransient} instead.
     *
     * TIP: If you would like to learn more about reentrancy and alternative ways
     * to protect against it, check out our blog post
     * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
     *
     * IMPORTANT: Deprecated. This storage-based reentrancy guard will be removed and replaced
     * by the {ReentrancyGuardTransient} variant in v6.0.
     *
     * @custom:stateless
     */
    abstract contract ReentrancyGuard {
        using StorageSlot for bytes32;
    
        // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff))
        bytes32 private constant REENTRANCY_GUARD_STORAGE =
            0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00;
    
        // Booleans are more expensive than uint256 or any type that takes up a full
        // word because each write operation emits an extra SLOAD to first read the
        // slot's contents, replace the bits taken up by the boolean, and then write
        // back. This is the compiler's defense against contract upgrades and
        // pointer aliasing, and it cannot be disabled.
    
        // The values being non-zero value makes deployment a bit more expensive,
        // but in exchange the refund on every call to nonReentrant will be lower in
        // amount. Since refunds are capped to a percentage of the total
        // transaction's gas, it is best to keep them low in cases like this one, to
        // increase the likelihood of the full refund coming into effect.
        uint256 private constant NOT_ENTERED = 1;
        uint256 private constant ENTERED = 2;
    
        /**
         * @dev Unauthorized reentrant call.
         */
        error ReentrancyGuardReentrantCall();
    
        constructor() {
            _reentrancyGuardStorageSlot().getUint256Slot().value = NOT_ENTERED;
        }
    
        /**
         * @dev Prevents a contract from calling itself, directly or indirectly.
         * Calling a `nonReentrant` function from another `nonReentrant`
         * function is not supported. It is possible to prevent this from happening
         * by making the `nonReentrant` function external, and making it call a
         * `private` function that does the actual work.
         */
        modifier nonReentrant() {
            _nonReentrantBefore();
            _;
            _nonReentrantAfter();
        }
    
        /**
         * @dev A `view` only version of {nonReentrant}. Use to block view functions
         * from being called, preventing reading from inconsistent contract state.
         *
         * CAUTION: This is a "view" modifier and does not change the reentrancy
         * status. Use it only on view functions. For payable or non-payable functions,
         * use the standard {nonReentrant} modifier instead.
         */
        modifier nonReentrantView() {
            _nonReentrantBeforeView();
            _;
        }
    
        function _nonReentrantBeforeView() private view {
            if (_reentrancyGuardEntered()) {
                revert ReentrancyGuardReentrantCall();
            }
        }
    
        function _nonReentrantBefore() private {
            // On the first call to nonReentrant, _status will be NOT_ENTERED
            _nonReentrantBeforeView();
    
            // Any calls to nonReentrant after this point will fail
            _reentrancyGuardStorageSlot().getUint256Slot().value = ENTERED;
        }
    
        function _nonReentrantAfter() private {
            // By storing the original value once again, a refund is triggered (see
            // https://eips.ethereum.org/EIPS/eip-2200)
            _reentrancyGuardStorageSlot().getUint256Slot().value = NOT_ENTERED;
        }
    
        /**
         * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
         * `nonReentrant` function in the call stack.
         */
        function _reentrancyGuardEntered() internal view returns (bool) {
            return _reentrancyGuardStorageSlot().getUint256Slot().value == ENTERED;
        }
    
        function _reentrancyGuardStorageSlot() internal pure virtual returns (bytes32) {
            return REENTRANCY_GUARD_STORAGE;
        }
    }
    
  • npm/@openzeppelin/contracts@5.6.1/utils/StorageSlot.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.1.0) (utils/StorageSlot.sol)
    // This file was procedurally generated from scripts/generate/templates/StorageSlot.js.
    
    pragma solidity ^0.8.20;
    
    /**
     * @dev Library for reading and writing primitive types to specific storage slots.
     *
     * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
     * This library helps with reading and writing to such slots without the need for inline assembly.
     *
     * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
     *
     * Example usage to set ERC-1967 implementation slot:
     * ```solidity
     * contract ERC1967 {
     *     // Define the slot. Alternatively, use the SlotDerivation library to derive the slot.
     *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
     *
     *     function _getImplementation() internal view returns (address) {
     *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
     *     }
     *
     *     function _setImplementation(address newImplementation) internal {
     *         require(newImplementation.code.length > 0);
     *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
     *     }
     * }
     * ```
     *
     * TIP: Consider using this library along with {SlotDerivation}.
     */
    library StorageSlot {
        struct AddressSlot {
            address value;
        }
    
        struct BooleanSlot {
            bool value;
        }
    
        struct Bytes32Slot {
            bytes32 value;
        }
    
        struct Uint256Slot {
            uint256 value;
        }
    
        struct Int256Slot {
            int256 value;
        }
    
        struct StringSlot {
            string value;
        }
    
        struct BytesSlot {
            bytes value;
        }
    
        /**
         * @dev Returns an `AddressSlot` with member `value` located at `slot`.
         */
        function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
            assembly ("memory-safe") {
                r.slot := slot
            }
        }
    
        /**
         * @dev Returns a `BooleanSlot` with member `value` located at `slot`.
         */
        function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
            assembly ("memory-safe") {
                r.slot := slot
            }
        }
    
        /**
         * @dev Returns a `Bytes32Slot` with member `value` located at `slot`.
         */
        function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
            assembly ("memory-safe") {
                r.slot := slot
            }
        }
    
        /**
         * @dev Returns a `Uint256Slot` with member `value` located at `slot`.
         */
        function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
            assembly ("memory-safe") {
                r.slot := slot
            }
        }
    
        /**
         * @dev Returns a `Int256Slot` with member `value` located at `slot`.
         */
        function getInt256Slot(bytes32 slot) internal pure returns (Int256Slot storage r) {
            assembly ("memory-safe") {
                r.slot := slot
            }
        }
    
        /**
         * @dev Returns a `StringSlot` with member `value` located at `slot`.
         */
        function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
            assembly ("memory-safe") {
                r.slot := slot
            }
        }
    
        /**
         * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
         */
        function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
            assembly ("memory-safe") {
                r.slot := store.slot
            }
        }
    
        /**
         * @dev Returns a `BytesSlot` with member `value` located at `slot`.
         */
        function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
            assembly ("memory-safe") {
                r.slot := slot
            }
        }
    
        /**
         * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
         */
        function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
            assembly ("memory-safe") {
                r.slot := store.slot
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.6.1/utils/Strings.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.6.0) (utils/Strings.sol)
    
    pragma solidity ^0.8.24;
    
    import {Math} from "./math/Math.sol";
    import {SafeCast} from "./math/SafeCast.sol";
    import {SignedMath} from "./math/SignedMath.sol";
    import {Bytes} from "./Bytes.sol";
    
    /**
     * @dev String operations.
     */
    library Strings {
        using SafeCast for *;
    
        bytes16 private constant HEX_DIGITS = "0123456789abcdef";
        uint8 private constant ADDRESS_LENGTH = 20;
        uint256 private constant SPECIAL_CHARS_LOOKUP =
            0xffffffff | // first 32 bits corresponding to the control characters (U+0000 to U+001F)
                (1 << 0x22) | // double quote
                (1 << 0x5c); // backslash
    
        /**
         * @dev The `value` string doesn't fit in the specified `length`.
         */
        error StringsInsufficientHexLength(uint256 value, uint256 length);
    
        /**
         * @dev The string being parsed contains characters that are not in scope of the given base.
         */
        error StringsInvalidChar();
    
        /**
         * @dev The string being parsed is not a properly formatted address.
         */
        error StringsInvalidAddressFormat();
    
        /**
         * @dev Converts a `uint256` to its ASCII `string` decimal representation.
         */
        function toString(uint256 value) internal pure returns (string memory) {
            unchecked {
                uint256 length = Math.log10(value) + 1;
                string memory buffer = new string(length);
                uint256 ptr;
                assembly ("memory-safe") {
                    ptr := add(add(buffer, 0x20), length)
                }
                while (true) {
                    ptr--;
                    assembly ("memory-safe") {
                        mstore8(ptr, byte(mod(value, 10), HEX_DIGITS))
                    }
                    value /= 10;
                    if (value == 0) break;
                }
                return buffer;
            }
        }
    
        /**
         * @dev Converts a `int256` to its ASCII `string` decimal representation.
         */
        function toStringSigned(int256 value) internal pure returns (string memory) {
            return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value)));
        }
    
        /**
         * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
         */
        function toHexString(uint256 value) internal pure returns (string memory) {
            unchecked {
                return toHexString(value, Math.log256(value) + 1);
            }
        }
    
        /**
         * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
         */
        function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
            uint256 localValue = value;
            bytes memory buffer = new bytes(2 * length + 2);
            buffer[0] = "0";
            buffer[1] = "x";
            for (uint256 i = 2 * length + 1; i > 1; --i) {
                buffer[i] = HEX_DIGITS[localValue & 0xf];
                localValue >>= 4;
            }
            if (localValue != 0) {
                revert StringsInsufficientHexLength(value, length);
            }
            return string(buffer);
        }
    
        /**
         * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal
         * representation.
         */
        function toHexString(address addr) internal pure returns (string memory) {
            return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH);
        }
    
        /**
         * @dev Converts an `address` with fixed length of 20 bytes to its checksummed ASCII `string` hexadecimal
         * representation, according to EIP-55.
         */
        function toChecksumHexString(address addr) internal pure returns (string memory) {
            bytes memory buffer = bytes(toHexString(addr));
    
            // hash the hex part of buffer (skip length + 2 bytes, length 40)
            uint256 hashValue;
            assembly ("memory-safe") {
                hashValue := shr(96, keccak256(add(buffer, 0x22), 40))
            }
    
            for (uint256 i = 41; i > 1; --i) {
                // possible values for buffer[i] are 48 (0) to 57 (9) and 97 (a) to 102 (f)
                if (hashValue & 0xf > 7 && uint8(buffer[i]) > 96) {
                    // case shift by xoring with 0x20
                    buffer[i] ^= 0x20;
                }
                hashValue >>= 4;
            }
            return string(buffer);
        }
    
        /**
         * @dev Converts a `bytes` buffer to its ASCII `string` hexadecimal representation.
         */
        function toHexString(bytes memory input) internal pure returns (string memory) {
            unchecked {
                bytes memory buffer = new bytes(2 * input.length + 2);
                buffer[0] = "0";
                buffer[1] = "x";
                for (uint256 i = 0; i < input.length; ++i) {
                    uint8 v = uint8(input[i]);
                    buffer[2 * i + 2] = HEX_DIGITS[v >> 4];
                    buffer[2 * i + 3] = HEX_DIGITS[v & 0xf];
                }
                return string(buffer);
            }
        }
    
        /**
         * @dev Returns true if the two strings are equal.
         */
        function equal(string memory a, string memory b) internal pure returns (bool) {
            return Bytes.equal(bytes(a), bytes(b));
        }
    
        /**
         * @dev Parse a decimal string and returns the value as a `uint256`.
         *
         * Requirements:
         * - The string must be formatted as `[0-9]*`
         * - The result must fit into an `uint256` type
         */
        function parseUint(string memory input) internal pure returns (uint256) {
            return parseUint(input, 0, bytes(input).length);
        }
    
        /**
         * @dev Variant of {parseUint-string} that parses a substring of `input` located between position `begin` (included) and
         * `end` (excluded).
         *
         * Requirements:
         * - The substring must be formatted as `[0-9]*`
         * - The result must fit into an `uint256` type
         */
        function parseUint(string memory input, uint256 begin, uint256 end) internal pure returns (uint256) {
            (bool success, uint256 value) = tryParseUint(input, begin, end);
            if (!success) revert StringsInvalidChar();
            return value;
        }
    
        /**
         * @dev Variant of {parseUint-string} that returns false if the parsing fails because of an invalid character.
         *
         * NOTE: This function will revert if the result does not fit in a `uint256`.
         */
        function tryParseUint(string memory input) internal pure returns (bool success, uint256 value) {
            return _tryParseUintUncheckedBounds(input, 0, bytes(input).length);
        }
    
        /**
         * @dev Variant of {parseUint-string-uint256-uint256} that returns false if the parsing fails because of an invalid
         * character.
         *
         * NOTE: This function will revert if the result does not fit in a `uint256`.
         */
        function tryParseUint(
            string memory input,
            uint256 begin,
            uint256 end
        ) internal pure returns (bool success, uint256 value) {
            if (end > bytes(input).length || begin > end) return (false, 0);
            return _tryParseUintUncheckedBounds(input, begin, end);
        }
    
        /**
         * @dev Implementation of {tryParseUint-string-uint256-uint256} that does not check bounds. Caller should make sure that
         * `begin <= end <= input.length`. Other inputs would result in undefined behavior.
         */
        function _tryParseUintUncheckedBounds(
            string memory input,
            uint256 begin,
            uint256 end
        ) private pure returns (bool success, uint256 value) {
            bytes memory buffer = bytes(input);
    
            uint256 result = 0;
            for (uint256 i = begin; i < end; ++i) {
                uint8 chr = _tryParseChr(bytes1(_unsafeReadBytesOffset(buffer, i)));
                if (chr > 9) return (false, 0);
                result *= 10;
                result += chr;
            }
            return (true, result);
        }
    
        /**
         * @dev Parse a decimal string and returns the value as a `int256`.
         *
         * Requirements:
         * - The string must be formatted as `[-+]?[0-9]*`
         * - The result must fit in an `int256` type.
         */
        function parseInt(string memory input) internal pure returns (int256) {
            return parseInt(input, 0, bytes(input).length);
        }
    
        /**
         * @dev Variant of {parseInt-string} that parses a substring of `input` located between position `begin` (included) and
         * `end` (excluded).
         *
         * Requirements:
         * - The substring must be formatted as `[-+]?[0-9]*`
         * - The result must fit in an `int256` type.
         */
        function parseInt(string memory input, uint256 begin, uint256 end) internal pure returns (int256) {
            (bool success, int256 value) = tryParseInt(input, begin, end);
            if (!success) revert StringsInvalidChar();
            return value;
        }
    
        /**
         * @dev Variant of {parseInt-string} that returns false if the parsing fails because of an invalid character or if
         * the result does not fit in a `int256`.
         *
         * NOTE: This function will revert if the absolute value of the result does not fit in a `uint256`.
         */
        function tryParseInt(string memory input) internal pure returns (bool success, int256 value) {
            return _tryParseIntUncheckedBounds(input, 0, bytes(input).length);
        }
    
        uint256 private constant ABS_MIN_INT256 = 2 ** 255;
    
        /**
         * @dev Variant of {parseInt-string-uint256-uint256} that returns false if the parsing fails because of an invalid
         * character or if the result does not fit in a `int256`.
         *
         * NOTE: This function will revert if the absolute value of the result does not fit in a `uint256`.
         */
        function tryParseInt(
            string memory input,
            uint256 begin,
            uint256 end
        ) internal pure returns (bool success, int256 value) {
            if (end > bytes(input).length || begin > end) return (false, 0);
            return _tryParseIntUncheckedBounds(input, begin, end);
        }
    
        /**
         * @dev Implementation of {tryParseInt-string-uint256-uint256} that does not check bounds. Caller should make sure that
         * `begin <= end <= input.length`. Other inputs would result in undefined behavior.
         */
        function _tryParseIntUncheckedBounds(
            string memory input,
            uint256 begin,
            uint256 end
        ) private pure returns (bool success, int256 value) {
            bytes memory buffer = bytes(input);
    
            // Check presence of a negative sign.
            bytes1 sign = begin == end ? bytes1(0) : bytes1(_unsafeReadBytesOffset(buffer, begin)); // don't do out-of-bound (possibly unsafe) read if sub-string is empty
            bool positiveSign = sign == bytes1("+");
            bool negativeSign = sign == bytes1("-");
            uint256 offset = (positiveSign || negativeSign).toUint();
    
            (bool absSuccess, uint256 absValue) = tryParseUint(input, begin + offset, end);
    
            if (absSuccess && absValue < ABS_MIN_INT256) {
                return (true, negativeSign ? -int256(absValue) : int256(absValue));
            } else if (absSuccess && negativeSign && absValue == ABS_MIN_INT256) {
                return (true, type(int256).min);
            } else return (false, 0);
        }
    
        /**
         * @dev Parse a hexadecimal string (with or without "0x" prefix), and returns the value as a `uint256`.
         *
         * Requirements:
         * - The string must be formatted as `(0x)?[0-9a-fA-F]*`
         * - The result must fit in an `uint256` type.
         */
        function parseHexUint(string memory input) internal pure returns (uint256) {
            return parseHexUint(input, 0, bytes(input).length);
        }
    
        /**
         * @dev Variant of {parseHexUint-string} that parses a substring of `input` located between position `begin` (included) and
         * `end` (excluded).
         *
         * Requirements:
         * - The substring must be formatted as `(0x)?[0-9a-fA-F]*`
         * - The result must fit in an `uint256` type.
         */
        function parseHexUint(string memory input, uint256 begin, uint256 end) internal pure returns (uint256) {
            (bool success, uint256 value) = tryParseHexUint(input, begin, end);
            if (!success) revert StringsInvalidChar();
            return value;
        }
    
        /**
         * @dev Variant of {parseHexUint-string} that returns false if the parsing fails because of an invalid character.
         *
         * NOTE: This function will revert if the result does not fit in a `uint256`.
         */
        function tryParseHexUint(string memory input) internal pure returns (bool success, uint256 value) {
            return _tryParseHexUintUncheckedBounds(input, 0, bytes(input).length);
        }
    
        /**
         * @dev Variant of {parseHexUint-string-uint256-uint256} that returns false if the parsing fails because of an
         * invalid character.
         *
         * NOTE: This function will revert if the result does not fit in a `uint256`.
         */
        function tryParseHexUint(
            string memory input,
            uint256 begin,
            uint256 end
        ) internal pure returns (bool success, uint256 value) {
            if (end > bytes(input).length || begin > end) return (false, 0);
            return _tryParseHexUintUncheckedBounds(input, begin, end);
        }
    
        /**
         * @dev Implementation of {tryParseHexUint-string-uint256-uint256} that does not check bounds. Caller should make sure that
         * `begin <= end <= input.length`. Other inputs would result in undefined behavior.
         */
        function _tryParseHexUintUncheckedBounds(
            string memory input,
            uint256 begin,
            uint256 end
        ) private pure returns (bool success, uint256 value) {
            bytes memory buffer = bytes(input);
    
            // skip 0x prefix if present
            bool hasPrefix = (end > begin + 1) && bytes2(_unsafeReadBytesOffset(buffer, begin)) == bytes2("0x"); // don't do out-of-bound (possibly unsafe) read if sub-string is empty
            uint256 offset = hasPrefix.toUint() * 2;
    
            uint256 result = 0;
            for (uint256 i = begin + offset; i < end; ++i) {
                uint8 chr = _tryParseChr(bytes1(_unsafeReadBytesOffset(buffer, i)));
                if (chr > 15) return (false, 0);
                result *= 16;
                unchecked {
                    // Multiplying by 16 is equivalent to a shift of 4 bits (with additional overflow check).
                    // This guarantees that adding a value < 16 will not cause an overflow, hence the unchecked.
                    result += chr;
                }
            }
            return (true, result);
        }
    
        /**
         * @dev Parse a hexadecimal string (with or without "0x" prefix), and returns the value as an `address`.
         *
         * Requirements:
         * - The string must be formatted as `(0x)?[0-9a-fA-F]{40}`
         */
        function parseAddress(string memory input) internal pure returns (address) {
            return parseAddress(input, 0, bytes(input).length);
        }
    
        /**
         * @dev Variant of {parseAddress-string} that parses a substring of `input` located between position `begin` (included) and
         * `end` (excluded).
         *
         * Requirements:
         * - The substring must be formatted as `(0x)?[0-9a-fA-F]{40}`
         */
        function parseAddress(string memory input, uint256 begin, uint256 end) internal pure returns (address) {
            (bool success, address value) = tryParseAddress(input, begin, end);
            if (!success) revert StringsInvalidAddressFormat();
            return value;
        }
    
        /**
         * @dev Variant of {parseAddress-string} that returns false if the parsing fails because the input is not a properly
         * formatted address. See {parseAddress-string} requirements.
         */
        function tryParseAddress(string memory input) internal pure returns (bool success, address value) {
            return tryParseAddress(input, 0, bytes(input).length);
        }
    
        /**
         * @dev Variant of {parseAddress-string-uint256-uint256} that returns false if the parsing fails because input is not a properly
         * formatted address. See {parseAddress-string-uint256-uint256} requirements.
         */
        function tryParseAddress(
            string memory input,
            uint256 begin,
            uint256 end
        ) internal pure returns (bool success, address value) {
            if (end > bytes(input).length || begin > end) return (false, address(0));
    
            bool hasPrefix = (end > begin + 1) && bytes2(_unsafeReadBytesOffset(bytes(input), begin)) == bytes2("0x"); // don't do out-of-bound (possibly unsafe) read if sub-string is empty
            uint256 expectedLength = 40 + hasPrefix.toUint() * 2;
    
            // check that input is the correct length
            if (end - begin == expectedLength) {
                // length guarantees that this does not overflow, and value is at most type(uint160).max
                (bool s, uint256 v) = _tryParseHexUintUncheckedBounds(input, begin, end);
                return (s, address(uint160(v)));
            } else {
                return (false, address(0));
            }
        }
    
        function _tryParseChr(bytes1 chr) private pure returns (uint8) {
            uint8 value = uint8(chr);
    
            // Try to parse `chr`:
            // - Case 1: [0-9]
            // - Case 2: [a-f]
            // - Case 3: [A-F]
            // - otherwise not supported
            unchecked {
                if (value > 47 && value < 58) value -= 48;
                else if (value > 96 && value < 103) value -= 87;
                else if (value > 64 && value < 71) value -= 55;
                else return type(uint8).max;
            }
    
            return value;
        }
    
        /**
         * @dev Escape special characters in JSON strings. This can be useful to prevent JSON injection in NFT metadata.
         *
         * WARNING: This function should only be used in double quoted JSON strings. Single quotes are not escaped.
         *
         * NOTE: This function escapes backslashes (including those in \uXXXX sequences) and the characters in ranges
         * defined in section 2.5 of RFC-4627 (U+0000 to U+001F, U+0022 and U+005C). All control characters in U+0000
         * to U+001F are escaped (\b, \t, \n, \f, \r use short form; others use \u00XX). ECMAScript's `JSON.parse` does
         * recover escaped unicode characters that are not in this range, but other tooling may provide different results.
         */
        function escapeJSON(string memory input) internal pure returns (string memory) {
            bytes memory buffer = bytes(input);
    
            // Put output at the FMP. Memory will be reserved later when we figure out the actual length of the escaped
            // string. All write are done using _unsafeWriteBytesOffset, which avoid the (expensive) length checks for
            // each character written.
            bytes memory output;
            assembly ("memory-safe") {
                output := mload(0x40)
            }
            uint256 outputLength = 0;
    
            for (uint256 i = 0; i < buffer.length; ++i) {
                uint8 char = uint8(bytes1(_unsafeReadBytesOffset(buffer, i)));
                if (((SPECIAL_CHARS_LOOKUP & (1 << char)) != 0)) {
                    _unsafeWriteBytesOffset(output, outputLength++, "\\");
                    if (char == 0x08) _unsafeWriteBytesOffset(output, outputLength++, "b");
                    else if (char == 0x09) _unsafeWriteBytesOffset(output, outputLength++, "t");
                    else if (char == 0x0a) _unsafeWriteBytesOffset(output, outputLength++, "n");
                    else if (char == 0x0c) _unsafeWriteBytesOffset(output, outputLength++, "f");
                    else if (char == 0x0d) _unsafeWriteBytesOffset(output, outputLength++, "r");
                    else if (char == 0x5c) _unsafeWriteBytesOffset(output, outputLength++, "\\");
                    else if (char == 0x22) {
                        // solhint-disable-next-line quotes
                        _unsafeWriteBytesOffset(output, outputLength++, '"');
                    } else {
                        // U+0000 to U+001F without short form: output \u00XX
                        _unsafeWriteBytesOffset(output, outputLength++, "u");
                        _unsafeWriteBytesOffset(output, outputLength++, "0");
                        _unsafeWriteBytesOffset(output, outputLength++, "0");
                        _unsafeWriteBytesOffset(output, outputLength++, HEX_DIGITS[char >> 4]);
                        _unsafeWriteBytesOffset(output, outputLength++, HEX_DIGITS[char & 0x0f]);
                    }
                } else {
                    _unsafeWriteBytesOffset(output, outputLength++, bytes1(char));
                }
            }
            // write the actual length and reserve memory
            assembly ("memory-safe") {
                mstore(output, outputLength)
                mstore(0x40, add(output, add(outputLength, 0x20)))
            }
    
            return string(output);
        }
    
        /**
         * @dev Reads a bytes32 from a bytes array without bounds checking.
         *
         * NOTE: making this function internal would mean it could be used with memory unsafe offset, and marking the
         * assembly block as such would prevent some optimizations.
         */
        function _unsafeReadBytesOffset(bytes memory buffer, uint256 offset) private pure returns (bytes32 value) {
            // This is not memory safe in the general case, but all calls to this private function are within bounds.
            assembly ("memory-safe") {
                value := mload(add(add(buffer, 0x20), offset))
            }
        }
    
        /**
         * @dev Write a bytes1 to a bytes array without bounds checking.
         *
         * NOTE: making this function internal would mean it could be used with memory unsafe offset, and marking the
         * assembly block as such would prevent some optimizations.
         */
        function _unsafeWriteBytesOffset(bytes memory buffer, uint256 offset, bytes1 value) private pure {
            // This is not memory safe in the general case, but all calls to this private function are within bounds.
            assembly ("memory-safe") {
                mstore8(add(add(buffer, 0x20), offset), shr(248, value))
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.6.1/utils/introspection/IERC165.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)
    
    pragma solidity >=0.4.16;
    
    /**
     * @dev Interface of the ERC-165 standard, as defined in the
     * https://eips.ethereum.org/EIPS/eip-165[ERC].
     *
     * 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[ERC 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);
    }
    
  • npm/@openzeppelin/contracts@5.6.1/utils/math/Math.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.6.0) (utils/math/Math.sol)
    
    pragma solidity ^0.8.20;
    
    import {Panic} from "../Panic.sol";
    import {SafeCast} from "./SafeCast.sol";
    
    /**
     * @dev Standard math utilities missing in the Solidity language.
     */
    library Math {
        enum Rounding {
            Floor, // Toward negative infinity
            Ceil, // Toward positive infinity
            Trunc, // Toward zero
            Expand // Away from zero
        }
    
        /**
         * @dev Return the 512-bit addition of two uint256.
         *
         * The result is stored in two 256 variables such that sum = high * 2²⁵⁶ + low.
         */
        function add512(uint256 a, uint256 b) internal pure returns (uint256 high, uint256 low) {
            assembly ("memory-safe") {
                low := add(a, b)
                high := lt(low, a)
            }
        }
    
        /**
         * @dev Return the 512-bit multiplication of two uint256.
         *
         * The result is stored in two 256 variables such that product = high * 2²⁵⁶ + low.
         */
        function mul512(uint256 a, uint256 b) internal pure returns (uint256 high, uint256 low) {
            // 512-bit multiply [high low] = x * y. Compute the product mod 2²⁵⁶ and mod 2²⁵⁶ - 1, then use
            // the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = high * 2²⁵⁶ + low.
            assembly ("memory-safe") {
                let mm := mulmod(a, b, not(0))
                low := mul(a, b)
                high := sub(sub(mm, low), lt(mm, low))
            }
        }
    
        /**
         * @dev Returns the addition of two unsigned integers, with a success flag (no overflow).
         */
        function tryAdd(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
            unchecked {
                uint256 c = a + b;
                success = c >= a;
                result = c * SafeCast.toUint(success);
            }
        }
    
        /**
         * @dev Returns the subtraction of two unsigned integers, with a success flag (no overflow).
         */
        function trySub(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
            unchecked {
                uint256 c = a - b;
                success = c <= a;
                result = c * SafeCast.toUint(success);
            }
        }
    
        /**
         * @dev Returns the multiplication of two unsigned integers, with a success flag (no overflow).
         */
        function tryMul(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
            unchecked {
                uint256 c = a * b;
                assembly ("memory-safe") {
                    // Only true when the multiplication doesn't overflow
                    // (c / a == b) || (a == 0)
                    success := or(eq(div(c, a), b), iszero(a))
                }
                // equivalent to: success ? c : 0
                result = c * SafeCast.toUint(success);
            }
        }
    
        /**
         * @dev Returns the division of two unsigned integers, with a success flag (no division by zero).
         */
        function tryDiv(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
            unchecked {
                success = b > 0;
                assembly ("memory-safe") {
                    // The `DIV` opcode returns zero when the denominator is 0.
                    result := div(a, b)
                }
            }
        }
    
        /**
         * @dev Returns the remainder of dividing two unsigned integers, with a success flag (no division by zero).
         */
        function tryMod(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
            unchecked {
                success = b > 0;
                assembly ("memory-safe") {
                    // The `MOD` opcode returns zero when the denominator is 0.
                    result := mod(a, b)
                }
            }
        }
    
        /**
         * @dev Unsigned saturating addition, bounds to `2²⁵⁶ - 1` instead of overflowing.
         */
        function saturatingAdd(uint256 a, uint256 b) internal pure returns (uint256) {
            (bool success, uint256 result) = tryAdd(a, b);
            return ternary(success, result, type(uint256).max);
        }
    
        /**
         * @dev Unsigned saturating subtraction, bounds to zero instead of overflowing.
         */
        function saturatingSub(uint256 a, uint256 b) internal pure returns (uint256) {
            (, uint256 result) = trySub(a, b);
            return result;
        }
    
        /**
         * @dev Unsigned saturating multiplication, bounds to `2²⁵⁶ - 1` instead of overflowing.
         */
        function saturatingMul(uint256 a, uint256 b) internal pure returns (uint256) {
            (bool success, uint256 result) = tryMul(a, b);
            return ternary(success, result, type(uint256).max);
        }
    
        /**
         * @dev Branchless ternary evaluation for `condition ? a : b`. Gas costs are constant.
         *
         * IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone.
         * However, the compiler may optimize Solidity ternary operations (i.e. `condition ? a : b`) to only compute
         * one branch when needed, making this function more expensive.
         */
        function ternary(bool condition, uint256 a, uint256 b) internal pure returns (uint256) {
            unchecked {
                // branchless ternary works because:
                // b ^ (a ^ b) == a
                // b ^ 0 == b
                return b ^ ((a ^ b) * SafeCast.toUint(condition));
            }
        }
    
        /**
         * @dev Returns the largest of two numbers.
         */
        function max(uint256 a, uint256 b) internal pure returns (uint256) {
            return ternary(a > b, a, b);
        }
    
        /**
         * @dev Returns the smallest of two numbers.
         */
        function min(uint256 a, uint256 b) internal pure returns (uint256) {
            return ternary(a < b, a, b);
        }
    
        /**
         * @dev Returns the average of two numbers. The result is rounded towards
         * zero.
         */
        function average(uint256 a, uint256 b) internal pure returns (uint256) {
            unchecked {
                // (a + b) / 2 can overflow.
                return (a & b) + (a ^ b) / 2;
            }
        }
    
        /**
         * @dev Returns the ceiling of the division of two numbers.
         *
         * This differs from standard division with `/` in that it rounds towards infinity instead
         * of rounding towards zero.
         */
        function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
            if (b == 0) {
                // Guarantee the same behavior as in a regular Solidity division.
                Panic.panic(Panic.DIVISION_BY_ZERO);
            }
    
            // The following calculation ensures accurate ceiling division without overflow.
            // Since a is non-zero, (a - 1) / b will not overflow.
            // The largest possible result occurs when (a - 1) / b is type(uint256).max,
            // but the largest value we can obtain is type(uint256).max - 1, which happens
            // when a = type(uint256).max and b = 1.
            unchecked {
                return SafeCast.toUint(a > 0) * ((a - 1) / b + 1);
            }
        }
    
        /**
         * @dev Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
         * denominator == 0.
         *
         * Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
         * Uniswap Labs also under MIT license.
         */
        function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
            unchecked {
                (uint256 high, uint256 low) = mul512(x, y);
    
                // Handle non-overflow cases, 256 by 256 division.
                if (high == 0) {
                    // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                    // The surrounding unchecked block does not change this fact.
                    // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                    return low / denominator;
                }
    
                // Make sure the result is less than 2²⁵⁶. Also prevents denominator == 0.
                if (denominator <= high) {
                    Panic.panic(ternary(denominator == 0, Panic.DIVISION_BY_ZERO, Panic.UNDER_OVERFLOW));
                }
    
                ///////////////////////////////////////////////
                // 512 by 256 division.
                ///////////////////////////////////////////////
    
                // Make division exact by subtracting the remainder from [high low].
                uint256 remainder;
                assembly ("memory-safe") {
                    // Compute remainder using mulmod.
                    remainder := mulmod(x, y, denominator)
    
                    // Subtract 256 bit number from 512 bit number.
                    high := sub(high, gt(remainder, low))
                    low := sub(low, remainder)
                }
    
                // Factor powers of two out of denominator and compute largest power of two divisor of denominator.
                // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.
    
                uint256 twos = denominator & (0 - denominator);
                assembly ("memory-safe") {
                    // Divide denominator by twos.
                    denominator := div(denominator, twos)
    
                    // Divide [high low] by twos.
                    low := div(low, twos)
    
                    // Flip twos such that it is 2²⁵⁶ / twos. If twos is zero, then it becomes one.
                    twos := add(div(sub(0, twos), twos), 1)
                }
    
                // Shift in bits from high into low.
                low |= high * twos;
    
                // Invert denominator mod 2²⁵⁶. Now that denominator is an odd number, it has an inverse modulo 2²⁵⁶ such
                // that denominator * inv ≡ 1 mod 2²⁵⁶. Compute the inverse by starting with a seed that is correct for
                // four bits. That is, denominator * inv ≡ 1 mod 2⁴.
                uint256 inverse = (3 * denominator) ^ 2;
    
                // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
                // works in modular arithmetic, doubling the correct bits in each step.
                inverse *= 2 - denominator * inverse; // inverse mod 2⁸
                inverse *= 2 - denominator * inverse; // inverse mod 2¹⁶
                inverse *= 2 - denominator * inverse; // inverse mod 2³²
                inverse *= 2 - denominator * inverse; // inverse mod 2⁶⁴
                inverse *= 2 - denominator * inverse; // inverse mod 2¹²⁸
                inverse *= 2 - denominator * inverse; // inverse mod 2²⁵⁶
    
                // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
                // This will give us the correct result modulo 2²⁵⁶. Since the preconditions guarantee that the outcome is
                // less than 2²⁵⁶, this is the final result. We don't need to compute the high bits of the result and high
                // is no longer required.
                result = low * inverse;
                return result;
            }
        }
    
        /**
         * @dev Calculates x * y / denominator with full precision, following the selected rounding direction.
         */
        function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
            return mulDiv(x, y, denominator) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0);
        }
    
        /**
         * @dev Calculates floor(x * y >> n) with full precision. Throws if result overflows a uint256.
         */
        function mulShr(uint256 x, uint256 y, uint8 n) internal pure returns (uint256 result) {
            unchecked {
                (uint256 high, uint256 low) = mul512(x, y);
                if (high >= 1 << n) {
                    Panic.panic(Panic.UNDER_OVERFLOW);
                }
                return (high << (256 - n)) | (low >> n);
            }
        }
    
        /**
         * @dev Calculates x * y >> n with full precision, following the selected rounding direction.
         */
        function mulShr(uint256 x, uint256 y, uint8 n, Rounding rounding) internal pure returns (uint256) {
            return mulShr(x, y, n) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, 1 << n) > 0);
        }
    
        /**
         * @dev Calculate the modular multiplicative inverse of a number in Z/nZ.
         *
         * If n is a prime, then Z/nZ is a field. In that case all elements are inversible, except 0.
         * If n is not a prime, then Z/nZ is not a field, and some elements might not be inversible.
         *
         * If the input value is not inversible, 0 is returned.
         *
         * NOTE: If you know for sure that n is (big) a prime, it may be cheaper to use Fermat's little theorem and get the
         * inverse using `Math.modExp(a, n - 2, n)`. See {invModPrime}.
         */
        function invMod(uint256 a, uint256 n) internal pure returns (uint256) {
            unchecked {
                if (n == 0) return 0;
    
                // The inverse modulo is calculated using the Extended Euclidean Algorithm (iterative version)
                // Used to compute integers x and y such that: ax + ny = gcd(a, n).
                // When the gcd is 1, then the inverse of a modulo n exists and it's x.
                // ax + ny = 1
                // ax = 1 + (-y)n
                // ax ≡ 1 (mod n) # x is the inverse of a modulo n
    
                // If the remainder is 0 the gcd is n right away.
                uint256 remainder = a % n;
                uint256 gcd = n;
    
                // Therefore the initial coefficients are:
                // ax + ny = gcd(a, n) = n
                // 0a + 1n = n
                int256 x = 0;
                int256 y = 1;
    
                while (remainder != 0) {
                    uint256 quotient = gcd / remainder;
    
                    (gcd, remainder) = (
                        // The old remainder is the next gcd to try.
                        remainder,
                        // Compute the next remainder.
                        // Can't overflow given that (a % gcd) * (gcd // (a % gcd)) <= gcd
                        // where gcd is at most n (capped to type(uint256).max)
                        gcd - remainder * quotient
                    );
    
                    (x, y) = (
                        // Increment the coefficient of a.
                        y,
                        // Decrement the coefficient of n.
                        // Can overflow, but the result is casted to uint256 so that the
                        // next value of y is "wrapped around" to a value between 0 and n - 1.
                        x - y * int256(quotient)
                    );
                }
    
                if (gcd != 1) return 0; // No inverse exists.
                return ternary(x < 0, n - uint256(-x), uint256(x)); // Wrap the result if it's negative.
            }
        }
    
        /**
         * @dev Variant of {invMod}. More efficient, but only works if `p` is known to be a prime greater than `2`.
         *
         * From https://en.wikipedia.org/wiki/Fermat%27s_little_theorem[Fermat's little theorem], we know that if p is
         * prime, then `a**(p-1) ≡ 1 mod p`. As a consequence, we have `a * a**(p-2) ≡ 1 mod p`, which means that
         * `a**(p-2)` is the modular multiplicative inverse of a in Fp.
         *
         * NOTE: this function does NOT check that `p` is a prime greater than `2`.
         */
        function invModPrime(uint256 a, uint256 p) internal view returns (uint256) {
            unchecked {
                return Math.modExp(a, p - 2, p);
            }
        }
    
        /**
         * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m)
         *
         * Requirements:
         * - modulus can't be zero
         * - underlying staticcall to precompile must succeed
         *
         * IMPORTANT: The result is only valid if the underlying call succeeds. When using this function, make
         * sure the chain you're using it on supports the precompiled contract for modular exponentiation
         * at address 0x05 as specified in https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise,
         * the underlying function will succeed given the lack of a revert, but the result may be incorrectly
         * interpreted as 0.
         */
        function modExp(uint256 b, uint256 e, uint256 m) internal view returns (uint256) {
            (bool success, uint256 result) = tryModExp(b, e, m);
            if (!success) {
                Panic.panic(Panic.DIVISION_BY_ZERO);
            }
            return result;
        }
    
        /**
         * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m).
         * It includes a success flag indicating if the operation succeeded. Operation will be marked as failed if trying
         * to operate modulo 0 or if the underlying precompile reverted.
         *
         * IMPORTANT: The result is only valid if the success flag is true. When using this function, make sure the chain
         * you're using it on supports the precompiled contract for modular exponentiation at address 0x05 as specified in
         * https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise, the underlying function will succeed given the lack
         * of a revert, but the result may be incorrectly interpreted as 0.
         */
        function tryModExp(uint256 b, uint256 e, uint256 m) internal view returns (bool success, uint256 result) {
            if (m == 0) return (false, 0);
            assembly ("memory-safe") {
                let ptr := mload(0x40)
                // | Offset    | Content    | Content (Hex)                                                      |
                // |-----------|------------|--------------------------------------------------------------------|
                // | 0x00:0x1f | size of b  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
                // | 0x20:0x3f | size of e  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
                // | 0x40:0x5f | size of m  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
                // | 0x60:0x7f | value of b | 0x<.............................................................b> |
                // | 0x80:0x9f | value of e | 0x<.............................................................e> |
                // | 0xa0:0xbf | value of m | 0x<.............................................................m> |
                mstore(ptr, 0x20)
                mstore(add(ptr, 0x20), 0x20)
                mstore(add(ptr, 0x40), 0x20)
                mstore(add(ptr, 0x60), b)
                mstore(add(ptr, 0x80), e)
                mstore(add(ptr, 0xa0), m)
    
                // Given the result < m, it's guaranteed to fit in 32 bytes,
                // so we can use the memory scratch space located at offset 0.
                success := staticcall(gas(), 0x05, ptr, 0xc0, 0x00, 0x20)
                result := mload(0x00)
            }
        }
    
        /**
         * @dev Variant of {modExp} that supports inputs of arbitrary length.
         */
        function modExp(bytes memory b, bytes memory e, bytes memory m) internal view returns (bytes memory) {
            (bool success, bytes memory result) = tryModExp(b, e, m);
            if (!success) {
                Panic.panic(Panic.DIVISION_BY_ZERO);
            }
            return result;
        }
    
        /**
         * @dev Variant of {tryModExp} that supports inputs of arbitrary length.
         */
        function tryModExp(
            bytes memory b,
            bytes memory e,
            bytes memory m
        ) internal view returns (bool success, bytes memory result) {
            if (_zeroBytes(m)) return (false, new bytes(0));
    
            uint256 mLen = m.length;
    
            // Encode call args in result and move the free memory pointer
            result = abi.encodePacked(b.length, e.length, mLen, b, e, m);
    
            assembly ("memory-safe") {
                let dataPtr := add(result, 0x20)
                // Write result on top of args to avoid allocating extra memory.
                success := staticcall(gas(), 0x05, dataPtr, mload(result), dataPtr, mLen)
                // Overwrite the length.
                // result.length > returndatasize() is guaranteed because returndatasize() == m.length
                mstore(result, mLen)
                // Set the memory pointer after the returned data.
                mstore(0x40, add(dataPtr, mLen))
            }
        }
    
        /**
         * @dev Returns whether the provided byte array is zero.
         */
        function _zeroBytes(bytes memory buffer) private pure returns (bool) {
            uint256 chunk;
            for (uint256 i = 0; i < buffer.length; i += 0x20) {
                // See _unsafeReadBytesOffset from utils/Bytes.sol
                assembly ("memory-safe") {
                    chunk := mload(add(add(buffer, 0x20), i))
                }
                if (chunk >> (8 * saturatingSub(i + 0x20, buffer.length)) != 0) {
                    return false;
                }
            }
            return true;
        }
    
        /**
         * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
         * towards zero.
         *
         * This method is based on Newton's method for computing square roots; the algorithm is restricted to only
         * using integer operations.
         */
        function sqrt(uint256 a) internal pure returns (uint256) {
            unchecked {
                // Take care of easy edge cases when a == 0 or a == 1
                if (a <= 1) {
                    return a;
                }
    
                // In this function, we use Newton's method to get a root of `f(x) := x² - a`. It involves building a
                // sequence x_n that converges toward sqrt(a). For each iteration x_n, we also define the error between
                // the current value as `ε_n = | x_n - sqrt(a) |`.
                //
                // For our first estimation, we consider `e` the smallest power of 2 which is bigger than the square root
                // of the target. (i.e. `2**(e-1) ≤ sqrt(a) < 2**e`). We know that `e ≤ 128` because `(2¹²⁸)² = 2²⁵⁶` is
                // bigger than any uint256.
                //
                // By noticing that
                // `2**(e-1) ≤ sqrt(a) < 2**e → (2**(e-1))² ≤ a < (2**e)² → 2**(2*e-2) ≤ a < 2**(2*e)`
                // we can deduce that `e - 1` is `log2(a) / 2`. We can thus compute `x_n = 2**(e-1)` using a method similar
                // to the msb function.
                uint256 aa = a;
                uint256 xn = 1;
    
                if (aa >= (1 << 128)) {
                    aa >>= 128;
                    xn <<= 64;
                }
                if (aa >= (1 << 64)) {
                    aa >>= 64;
                    xn <<= 32;
                }
                if (aa >= (1 << 32)) {
                    aa >>= 32;
                    xn <<= 16;
                }
                if (aa >= (1 << 16)) {
                    aa >>= 16;
                    xn <<= 8;
                }
                if (aa >= (1 << 8)) {
                    aa >>= 8;
                    xn <<= 4;
                }
                if (aa >= (1 << 4)) {
                    aa >>= 4;
                    xn <<= 2;
                }
                if (aa >= (1 << 2)) {
                    xn <<= 1;
                }
    
                // We now have x_n such that `x_n = 2**(e-1) ≤ sqrt(a) < 2**e = 2 * x_n`. This implies ε_n ≤ 2**(e-1).
                //
                // We can refine our estimation by noticing that the middle of that interval minimizes the error.
                // If we move x_n to equal 2**(e-1) + 2**(e-2), then we reduce the error to ε_n ≤ 2**(e-2).
                // This is going to be our x_0 (and ε_0)
                xn = (3 * xn) >> 1; // ε_0 := | x_0 - sqrt(a) | ≤ 2**(e-2)
    
                // From here, Newton's method give us:
                // x_{n+1} = (x_n + a / x_n) / 2
                //
                // One should note that:
                // x_{n+1}² - a = ((x_n + a / x_n) / 2)² - a
                //              = ((x_n² + a) / (2 * x_n))² - a
                //              = (x_n⁴ + 2 * a * x_n² + a²) / (4 * x_n²) - a
                //              = (x_n⁴ + 2 * a * x_n² + a² - 4 * a * x_n²) / (4 * x_n²)
                //              = (x_n⁴ - 2 * a * x_n² + a²) / (4 * x_n²)
                //              = (x_n² - a)² / (2 * x_n)²
                //              = ((x_n² - a) / (2 * x_n))²
                //              ≥ 0
                // Which proves that for all n ≥ 1, sqrt(a) ≤ x_n
                //
                // This gives us the proof of quadratic convergence of the sequence:
                // ε_{n+1} = | x_{n+1} - sqrt(a) |
                //         = | (x_n + a / x_n) / 2 - sqrt(a) |
                //         = | (x_n² + a - 2*x_n*sqrt(a)) / (2 * x_n) |
                //         = | (x_n - sqrt(a))² / (2 * x_n) |
                //         = | ε_n² / (2 * x_n) |
                //         = ε_n² / | (2 * x_n) |
                //
                // For the first iteration, we have a special case where x_0 is known:
                // ε_1 = ε_0² / | (2 * x_0) |
                //     ≤ (2**(e-2))² / (2 * (2**(e-1) + 2**(e-2)))
                //     ≤ 2**(2*e-4) / (3 * 2**(e-1))
                //     ≤ 2**(e-3) / 3
                //     ≤ 2**(e-3-log2(3))
                //     ≤ 2**(e-4.5)
                //
                // For the following iterations, we use the fact that, 2**(e-1) ≤ sqrt(a) ≤ x_n:
                // ε_{n+1} = ε_n² / | (2 * x_n) |
                //         ≤ (2**(e-k))² / (2 * 2**(e-1))
                //         ≤ 2**(2*e-2*k) / 2**e
                //         ≤ 2**(e-2*k)
                xn = (xn + a / xn) >> 1; // ε_1 := | x_1 - sqrt(a) | ≤ 2**(e-4.5)  -- special case, see above
                xn = (xn + a / xn) >> 1; // ε_2 := | x_2 - sqrt(a) | ≤ 2**(e-9)    -- general case with k = 4.5
                xn = (xn + a / xn) >> 1; // ε_3 := | x_3 - sqrt(a) | ≤ 2**(e-18)   -- general case with k = 9
                xn = (xn + a / xn) >> 1; // ε_4 := | x_4 - sqrt(a) | ≤ 2**(e-36)   -- general case with k = 18
                xn = (xn + a / xn) >> 1; // ε_5 := | x_5 - sqrt(a) | ≤ 2**(e-72)   -- general case with k = 36
                xn = (xn + a / xn) >> 1; // ε_6 := | x_6 - sqrt(a) | ≤ 2**(e-144)  -- general case with k = 72
    
                // Because e ≤ 128 (as discussed during the first estimation phase), we know have reached a precision
                // ε_6 ≤ 2**(e-144) < 1. Given we're operating on integers, then we can ensure that xn is now either
                // sqrt(a) or sqrt(a) + 1.
                return xn - SafeCast.toUint(xn > a / xn);
            }
        }
    
        /**
         * @dev Calculates sqrt(a), following the selected rounding direction.
         */
        function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
            unchecked {
                uint256 result = sqrt(a);
                return result + SafeCast.toUint(unsignedRoundsUp(rounding) && result * result < a);
            }
        }
    
        /**
         * @dev Return the log in base 2 of a positive value rounded towards zero.
         * Returns 0 if given 0.
         */
        function log2(uint256 x) internal pure returns (uint256 r) {
            // If value has upper 128 bits set, log2 result is at least 128
            r = SafeCast.toUint(x > 0xffffffffffffffffffffffffffffffff) << 7;
            // If upper 64 bits of 128-bit half set, add 64 to result
            r |= SafeCast.toUint((x >> r) > 0xffffffffffffffff) << 6;
            // If upper 32 bits of 64-bit half set, add 32 to result
            r |= SafeCast.toUint((x >> r) > 0xffffffff) << 5;
            // If upper 16 bits of 32-bit half set, add 16 to result
            r |= SafeCast.toUint((x >> r) > 0xffff) << 4;
            // If upper 8 bits of 16-bit half set, add 8 to result
            r |= SafeCast.toUint((x >> r) > 0xff) << 3;
            // If upper 4 bits of 8-bit half set, add 4 to result
            r |= SafeCast.toUint((x >> r) > 0xf) << 2;
    
            // Shifts value right by the current result and use it as an index into this lookup table:
            //
            // | x (4 bits) |  index  | table[index] = MSB position |
            // |------------|---------|-----------------------------|
            // |    0000    |    0    |        table[0] = 0         |
            // |    0001    |    1    |        table[1] = 0         |
            // |    0010    |    2    |        table[2] = 1         |
            // |    0011    |    3    |        table[3] = 1         |
            // |    0100    |    4    |        table[4] = 2         |
            // |    0101    |    5    |        table[5] = 2         |
            // |    0110    |    6    |        table[6] = 2         |
            // |    0111    |    7    |        table[7] = 2         |
            // |    1000    |    8    |        table[8] = 3         |
            // |    1001    |    9    |        table[9] = 3         |
            // |    1010    |   10    |        table[10] = 3        |
            // |    1011    |   11    |        table[11] = 3        |
            // |    1100    |   12    |        table[12] = 3        |
            // |    1101    |   13    |        table[13] = 3        |
            // |    1110    |   14    |        table[14] = 3        |
            // |    1111    |   15    |        table[15] = 3        |
            //
            // The lookup table is represented as a 32-byte value with the MSB positions for 0-15 in the first 16 bytes (most significant half).
            assembly ("memory-safe") {
                r := or(r, byte(shr(r, x), 0x0000010102020202030303030303030300000000000000000000000000000000))
            }
        }
    
        /**
         * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
         * Returns 0 if given 0.
         */
        function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
            unchecked {
                uint256 result = log2(value);
                return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << result < value);
            }
        }
    
        /**
         * @dev Return the log in base 10 of a positive value rounded towards zero.
         * Returns 0 if given 0.
         */
        function log10(uint256 value) internal pure returns (uint256) {
            uint256 result = 0;
            unchecked {
                if (value >= 10 ** 64) {
                    value /= 10 ** 64;
                    result += 64;
                }
                if (value >= 10 ** 32) {
                    value /= 10 ** 32;
                    result += 32;
                }
                if (value >= 10 ** 16) {
                    value /= 10 ** 16;
                    result += 16;
                }
                if (value >= 10 ** 8) {
                    value /= 10 ** 8;
                    result += 8;
                }
                if (value >= 10 ** 4) {
                    value /= 10 ** 4;
                    result += 4;
                }
                if (value >= 10 ** 2) {
                    value /= 10 ** 2;
                    result += 2;
                }
                if (value >= 10 ** 1) {
                    result += 1;
                }
            }
            return result;
        }
    
        /**
         * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
         * Returns 0 if given 0.
         */
        function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
            unchecked {
                uint256 result = log10(value);
                return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 10 ** result < value);
            }
        }
    
        /**
         * @dev Return the log in base 256 of a positive value rounded towards zero.
         * Returns 0 if given 0.
         *
         * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
         */
        function log256(uint256 x) internal pure returns (uint256 r) {
            // If value has upper 128 bits set, log2 result is at least 128
            r = SafeCast.toUint(x > 0xffffffffffffffffffffffffffffffff) << 7;
            // If upper 64 bits of 128-bit half set, add 64 to result
            r |= SafeCast.toUint((x >> r) > 0xffffffffffffffff) << 6;
            // If upper 32 bits of 64-bit half set, add 32 to result
            r |= SafeCast.toUint((x >> r) > 0xffffffff) << 5;
            // If upper 16 bits of 32-bit half set, add 16 to result
            r |= SafeCast.toUint((x >> r) > 0xffff) << 4;
            // Add 1 if upper 8 bits of 16-bit half set, and divide accumulated result by 8
            return (r >> 3) | SafeCast.toUint((x >> r) > 0xff);
        }
    
        /**
         * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
         * Returns 0 if given 0.
         */
        function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
            unchecked {
                uint256 result = log256(value);
                return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << (result << 3) < value);
            }
        }
    
        /**
         * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
         */
        function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
            return uint8(rounding) % 2 == 1;
        }
    
        /**
         * @dev Counts the number of leading zero bits in a uint256.
         */
        function clz(uint256 x) internal pure returns (uint256) {
            return ternary(x == 0, 256, 255 - log2(x));
        }
    }
    
  • npm/@openzeppelin/contracts@5.6.1/utils/math/SafeCast.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.6.0) (utils/math/SafeCast.sol)
    // This file was procedurally generated from scripts/generate/templates/SafeCast.js.
    
    pragma solidity ^0.8.20;
    
    /**
     * @dev Wrappers over Solidity's uintXX/intXX/bool casting operators with added overflow
     * checks.
     *
     * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
     * easily result in undesired exploitation or bugs, since developers usually
     * assume that overflows raise errors. `SafeCast` restores this intuition by
     * reverting the transaction when such an operation overflows.
     *
     * Using this library instead of the unchecked operations eliminates an entire
     * class of bugs, so it's recommended to use it always.
     */
    library SafeCast {
        /**
         * @dev Value doesn't fit in a uint of `bits` size.
         */
        error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value);
    
        /**
         * @dev An int value doesn't fit in a uint of `bits` size.
         */
        error SafeCastOverflowedIntToUint(int256 value);
    
        /**
         * @dev Value doesn't fit in an int of `bits` size.
         */
        error SafeCastOverflowedIntDowncast(uint8 bits, int256 value);
    
        /**
         * @dev A uint value doesn't fit in an int of `bits` size.
         */
        error SafeCastOverflowedUintToInt(uint256 value);
    
        /**
         * @dev Returns the downcasted uint248 from uint256, reverting on
         * overflow (when the input is greater than largest uint248).
         *
         * Counterpart to Solidity's `uint248` operator.
         *
         * Requirements:
         *
         * - input must fit into 248 bits
         */
        function toUint248(uint256 value) internal pure returns (uint248) {
            if (value > type(uint248).max) {
                revert SafeCastOverflowedUintDowncast(248, value);
            }
            return uint248(value);
        }
    
        /**
         * @dev Returns the downcasted uint240 from uint256, reverting on
         * overflow (when the input is greater than largest uint240).
         *
         * Counterpart to Solidity's `uint240` operator.
         *
         * Requirements:
         *
         * - input must fit into 240 bits
         */
        function toUint240(uint256 value) internal pure returns (uint240) {
            if (value > type(uint240).max) {
                revert SafeCastOverflowedUintDowncast(240, value);
            }
            return uint240(value);
        }
    
        /**
         * @dev Returns the downcasted uint232 from uint256, reverting on
         * overflow (when the input is greater than largest uint232).
         *
         * Counterpart to Solidity's `uint232` operator.
         *
         * Requirements:
         *
         * - input must fit into 232 bits
         */
        function toUint232(uint256 value) internal pure returns (uint232) {
            if (value > type(uint232).max) {
                revert SafeCastOverflowedUintDowncast(232, value);
            }
            return uint232(value);
        }
    
        /**
         * @dev Returns the downcasted uint224 from uint256, reverting on
         * overflow (when the input is greater than largest uint224).
         *
         * Counterpart to Solidity's `uint224` operator.
         *
         * Requirements:
         *
         * - input must fit into 224 bits
         */
        function toUint224(uint256 value) internal pure returns (uint224) {
            if (value > type(uint224).max) {
                revert SafeCastOverflowedUintDowncast(224, value);
            }
            return uint224(value);
        }
    
        /**
         * @dev Returns the downcasted uint216 from uint256, reverting on
         * overflow (when the input is greater than largest uint216).
         *
         * Counterpart to Solidity's `uint216` operator.
         *
         * Requirements:
         *
         * - input must fit into 216 bits
         */
        function toUint216(uint256 value) internal pure returns (uint216) {
            if (value > type(uint216).max) {
                revert SafeCastOverflowedUintDowncast(216, value);
            }
            return uint216(value);
        }
    
        /**
         * @dev Returns the downcasted uint208 from uint256, reverting on
         * overflow (when the input is greater than largest uint208).
         *
         * Counterpart to Solidity's `uint208` operator.
         *
         * Requirements:
         *
         * - input must fit into 208 bits
         */
        function toUint208(uint256 value) internal pure returns (uint208) {
            if (value > type(uint208).max) {
                revert SafeCastOverflowedUintDowncast(208, value);
            }
            return uint208(value);
        }
    
        /**
         * @dev Returns the downcasted uint200 from uint256, reverting on
         * overflow (when the input is greater than largest uint200).
         *
         * Counterpart to Solidity's `uint200` operator.
         *
         * Requirements:
         *
         * - input must fit into 200 bits
         */
        function toUint200(uint256 value) internal pure returns (uint200) {
            if (value > type(uint200).max) {
                revert SafeCastOverflowedUintDowncast(200, value);
            }
            return uint200(value);
        }
    
        /**
         * @dev Returns the downcasted uint192 from uint256, reverting on
         * overflow (when the input is greater than largest uint192).
         *
         * Counterpart to Solidity's `uint192` operator.
         *
         * Requirements:
         *
         * - input must fit into 192 bits
         */
        function toUint192(uint256 value) internal pure returns (uint192) {
            if (value > type(uint192).max) {
                revert SafeCastOverflowedUintDowncast(192, value);
            }
            return uint192(value);
        }
    
        /**
         * @dev Returns the downcasted uint184 from uint256, reverting on
         * overflow (when the input is greater than largest uint184).
         *
         * Counterpart to Solidity's `uint184` operator.
         *
         * Requirements:
         *
         * - input must fit into 184 bits
         */
        function toUint184(uint256 value) internal pure returns (uint184) {
            if (value > type(uint184).max) {
                revert SafeCastOverflowedUintDowncast(184, value);
            }
            return uint184(value);
        }
    
        /**
         * @dev Returns the downcasted uint176 from uint256, reverting on
         * overflow (when the input is greater than largest uint176).
         *
         * Counterpart to Solidity's `uint176` operator.
         *
         * Requirements:
         *
         * - input must fit into 176 bits
         */
        function toUint176(uint256 value) internal pure returns (uint176) {
            if (value > type(uint176).max) {
                revert SafeCastOverflowedUintDowncast(176, value);
            }
            return uint176(value);
        }
    
        /**
         * @dev Returns the downcasted uint168 from uint256, reverting on
         * overflow (when the input is greater than largest uint168).
         *
         * Counterpart to Solidity's `uint168` operator.
         *
         * Requirements:
         *
         * - input must fit into 168 bits
         */
        function toUint168(uint256 value) internal pure returns (uint168) {
            if (value > type(uint168).max) {
                revert SafeCastOverflowedUintDowncast(168, value);
            }
            return uint168(value);
        }
    
        /**
         * @dev Returns the downcasted uint160 from uint256, reverting on
         * overflow (when the input is greater than largest uint160).
         *
         * Counterpart to Solidity's `uint160` operator.
         *
         * Requirements:
         *
         * - input must fit into 160 bits
         */
        function toUint160(uint256 value) internal pure returns (uint160) {
            if (value > type(uint160).max) {
                revert SafeCastOverflowedUintDowncast(160, value);
            }
            return uint160(value);
        }
    
        /**
         * @dev Returns the downcasted uint152 from uint256, reverting on
         * overflow (when the input is greater than largest uint152).
         *
         * Counterpart to Solidity's `uint152` operator.
         *
         * Requirements:
         *
         * - input must fit into 152 bits
         */
        function toUint152(uint256 value) internal pure returns (uint152) {
            if (value > type(uint152).max) {
                revert SafeCastOverflowedUintDowncast(152, value);
            }
            return uint152(value);
        }
    
        /**
         * @dev Returns the downcasted uint144 from uint256, reverting on
         * overflow (when the input is greater than largest uint144).
         *
         * Counterpart to Solidity's `uint144` operator.
         *
         * Requirements:
         *
         * - input must fit into 144 bits
         */
        function toUint144(uint256 value) internal pure returns (uint144) {
            if (value > type(uint144).max) {
                revert SafeCastOverflowedUintDowncast(144, value);
            }
            return uint144(value);
        }
    
        /**
         * @dev Returns the downcasted uint136 from uint256, reverting on
         * overflow (when the input is greater than largest uint136).
         *
         * Counterpart to Solidity's `uint136` operator.
         *
         * Requirements:
         *
         * - input must fit into 136 bits
         */
        function toUint136(uint256 value) internal pure returns (uint136) {
            if (value > type(uint136).max) {
                revert SafeCastOverflowedUintDowncast(136, value);
            }
            return uint136(value);
        }
    
        /**
         * @dev Returns the downcasted uint128 from uint256, reverting on
         * overflow (when the input is greater than largest uint128).
         *
         * Counterpart to Solidity's `uint128` operator.
         *
         * Requirements:
         *
         * - input must fit into 128 bits
         */
        function toUint128(uint256 value) internal pure returns (uint128) {
            if (value > type(uint128).max) {
                revert SafeCastOverflowedUintDowncast(128, value);
            }
            return uint128(value);
        }
    
        /**
         * @dev Returns the downcasted uint120 from uint256, reverting on
         * overflow (when the input is greater than largest uint120).
         *
         * Counterpart to Solidity's `uint120` operator.
         *
         * Requirements:
         *
         * - input must fit into 120 bits
         */
        function toUint120(uint256 value) internal pure returns (uint120) {
            if (value > type(uint120).max) {
                revert SafeCastOverflowedUintDowncast(120, value);
            }
            return uint120(value);
        }
    
        /**
         * @dev Returns the downcasted uint112 from uint256, reverting on
         * overflow (when the input is greater than largest uint112).
         *
         * Counterpart to Solidity's `uint112` operator.
         *
         * Requirements:
         *
         * - input must fit into 112 bits
         */
        function toUint112(uint256 value) internal pure returns (uint112) {
            if (value > type(uint112).max) {
                revert SafeCastOverflowedUintDowncast(112, value);
            }
            return uint112(value);
        }
    
        /**
         * @dev Returns the downcasted uint104 from uint256, reverting on
         * overflow (when the input is greater than largest uint104).
         *
         * Counterpart to Solidity's `uint104` operator.
         *
         * Requirements:
         *
         * - input must fit into 104 bits
         */
        function toUint104(uint256 value) internal pure returns (uint104) {
            if (value > type(uint104).max) {
                revert SafeCastOverflowedUintDowncast(104, value);
            }
            return uint104(value);
        }
    
        /**
         * @dev Returns the downcasted uint96 from uint256, reverting on
         * overflow (when the input is greater than largest uint96).
         *
         * Counterpart to Solidity's `uint96` operator.
         *
         * Requirements:
         *
         * - input must fit into 96 bits
         */
        function toUint96(uint256 value) internal pure returns (uint96) {
            if (value > type(uint96).max) {
                revert SafeCastOverflowedUintDowncast(96, value);
            }
            return uint96(value);
        }
    
        /**
         * @dev Returns the downcasted uint88 from uint256, reverting on
         * overflow (when the input is greater than largest uint88).
         *
         * Counterpart to Solidity's `uint88` operator.
         *
         * Requirements:
         *
         * - input must fit into 88 bits
         */
        function toUint88(uint256 value) internal pure returns (uint88) {
            if (value > type(uint88).max) {
                revert SafeCastOverflowedUintDowncast(88, value);
            }
            return uint88(value);
        }
    
        /**
         * @dev Returns the downcasted uint80 from uint256, reverting on
         * overflow (when the input is greater than largest uint80).
         *
         * Counterpart to Solidity's `uint80` operator.
         *
         * Requirements:
         *
         * - input must fit into 80 bits
         */
        function toUint80(uint256 value) internal pure returns (uint80) {
            if (value > type(uint80).max) {
                revert SafeCastOverflowedUintDowncast(80, value);
            }
            return uint80(value);
        }
    
        /**
         * @dev Returns the downcasted uint72 from uint256, reverting on
         * overflow (when the input is greater than largest uint72).
         *
         * Counterpart to Solidity's `uint72` operator.
         *
         * Requirements:
         *
         * - input must fit into 72 bits
         */
        function toUint72(uint256 value) internal pure returns (uint72) {
            if (value > type(uint72).max) {
                revert SafeCastOverflowedUintDowncast(72, value);
            }
            return uint72(value);
        }
    
        /**
         * @dev Returns the downcasted uint64 from uint256, reverting on
         * overflow (when the input is greater than largest uint64).
         *
         * Counterpart to Solidity's `uint64` operator.
         *
         * Requirements:
         *
         * - input must fit into 64 bits
         */
        function toUint64(uint256 value) internal pure returns (uint64) {
            if (value > type(uint64).max) {
                revert SafeCastOverflowedUintDowncast(64, value);
            }
            return uint64(value);
        }
    
        /**
         * @dev Returns the downcasted uint56 from uint256, reverting on
         * overflow (when the input is greater than largest uint56).
         *
         * Counterpart to Solidity's `uint56` operator.
         *
         * Requirements:
         *
         * - input must fit into 56 bits
         */
        function toUint56(uint256 value) internal pure returns (uint56) {
            if (value > type(uint56).max) {
                revert SafeCastOverflowedUintDowncast(56, value);
            }
            return uint56(value);
        }
    
        /**
         * @dev Returns the downcasted uint48 from uint256, reverting on
         * overflow (when the input is greater than largest uint48).
         *
         * Counterpart to Solidity's `uint48` operator.
         *
         * Requirements:
         *
         * - input must fit into 48 bits
         */
        function toUint48(uint256 value) internal pure returns (uint48) {
            if (value > type(uint48).max) {
                revert SafeCastOverflowedUintDowncast(48, value);
            }
            return uint48(value);
        }
    
        /**
         * @dev Returns the downcasted uint40 from uint256, reverting on
         * overflow (when the input is greater than largest uint40).
         *
         * Counterpart to Solidity's `uint40` operator.
         *
         * Requirements:
         *
         * - input must fit into 40 bits
         */
        function toUint40(uint256 value) internal pure returns (uint40) {
            if (value > type(uint40).max) {
                revert SafeCastOverflowedUintDowncast(40, value);
            }
            return uint40(value);
        }
    
        /**
         * @dev Returns the downcasted uint32 from uint256, reverting on
         * overflow (when the input is greater than largest uint32).
         *
         * Counterpart to Solidity's `uint32` operator.
         *
         * Requirements:
         *
         * - input must fit into 32 bits
         */
        function toUint32(uint256 value) internal pure returns (uint32) {
            if (value > type(uint32).max) {
                revert SafeCastOverflowedUintDowncast(32, value);
            }
            return uint32(value);
        }
    
        /**
         * @dev Returns the downcasted uint24 from uint256, reverting on
         * overflow (when the input is greater than largest uint24).
         *
         * Counterpart to Solidity's `uint24` operator.
         *
         * Requirements:
         *
         * - input must fit into 24 bits
         */
        function toUint24(uint256 value) internal pure returns (uint24) {
            if (value > type(uint24).max) {
                revert SafeCastOverflowedUintDowncast(24, value);
            }
            return uint24(value);
        }
    
        /**
         * @dev Returns the downcasted uint16 from uint256, reverting on
         * overflow (when the input is greater than largest uint16).
         *
         * Counterpart to Solidity's `uint16` operator.
         *
         * Requirements:
         *
         * - input must fit into 16 bits
         */
        function toUint16(uint256 value) internal pure returns (uint16) {
            if (value > type(uint16).max) {
                revert SafeCastOverflowedUintDowncast(16, value);
            }
            return uint16(value);
        }
    
        /**
         * @dev Returns the downcasted uint8 from uint256, reverting on
         * overflow (when the input is greater than largest uint8).
         *
         * Counterpart to Solidity's `uint8` operator.
         *
         * Requirements:
         *
         * - input must fit into 8 bits
         */
        function toUint8(uint256 value) internal pure returns (uint8) {
            if (value > type(uint8).max) {
                revert SafeCastOverflowedUintDowncast(8, value);
            }
            return uint8(value);
        }
    
        /**
         * @dev Converts a signed int256 into an unsigned uint256.
         *
         * Requirements:
         *
         * - input must be greater than or equal to 0.
         */
        function toUint256(int256 value) internal pure returns (uint256) {
            if (value < 0) {
                revert SafeCastOverflowedIntToUint(value);
            }
            return uint256(value);
        }
    
        /**
         * @dev Returns the downcasted int248 from int256, reverting on
         * overflow (when the input is less than smallest int248 or
         * greater than largest int248).
         *
         * Counterpart to Solidity's `int248` operator.
         *
         * Requirements:
         *
         * - input must fit into 248 bits
         */
        function toInt248(int256 value) internal pure returns (int248 downcasted) {
            downcasted = int248(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(248, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int240 from int256, reverting on
         * overflow (when the input is less than smallest int240 or
         * greater than largest int240).
         *
         * Counterpart to Solidity's `int240` operator.
         *
         * Requirements:
         *
         * - input must fit into 240 bits
         */
        function toInt240(int256 value) internal pure returns (int240 downcasted) {
            downcasted = int240(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(240, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int232 from int256, reverting on
         * overflow (when the input is less than smallest int232 or
         * greater than largest int232).
         *
         * Counterpart to Solidity's `int232` operator.
         *
         * Requirements:
         *
         * - input must fit into 232 bits
         */
        function toInt232(int256 value) internal pure returns (int232 downcasted) {
            downcasted = int232(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(232, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int224 from int256, reverting on
         * overflow (when the input is less than smallest int224 or
         * greater than largest int224).
         *
         * Counterpart to Solidity's `int224` operator.
         *
         * Requirements:
         *
         * - input must fit into 224 bits
         */
        function toInt224(int256 value) internal pure returns (int224 downcasted) {
            downcasted = int224(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(224, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int216 from int256, reverting on
         * overflow (when the input is less than smallest int216 or
         * greater than largest int216).
         *
         * Counterpart to Solidity's `int216` operator.
         *
         * Requirements:
         *
         * - input must fit into 216 bits
         */
        function toInt216(int256 value) internal pure returns (int216 downcasted) {
            downcasted = int216(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(216, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int208 from int256, reverting on
         * overflow (when the input is less than smallest int208 or
         * greater than largest int208).
         *
         * Counterpart to Solidity's `int208` operator.
         *
         * Requirements:
         *
         * - input must fit into 208 bits
         */
        function toInt208(int256 value) internal pure returns (int208 downcasted) {
            downcasted = int208(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(208, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int200 from int256, reverting on
         * overflow (when the input is less than smallest int200 or
         * greater than largest int200).
         *
         * Counterpart to Solidity's `int200` operator.
         *
         * Requirements:
         *
         * - input must fit into 200 bits
         */
        function toInt200(int256 value) internal pure returns (int200 downcasted) {
            downcasted = int200(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(200, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int192 from int256, reverting on
         * overflow (when the input is less than smallest int192 or
         * greater than largest int192).
         *
         * Counterpart to Solidity's `int192` operator.
         *
         * Requirements:
         *
         * - input must fit into 192 bits
         */
        function toInt192(int256 value) internal pure returns (int192 downcasted) {
            downcasted = int192(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(192, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int184 from int256, reverting on
         * overflow (when the input is less than smallest int184 or
         * greater than largest int184).
         *
         * Counterpart to Solidity's `int184` operator.
         *
         * Requirements:
         *
         * - input must fit into 184 bits
         */
        function toInt184(int256 value) internal pure returns (int184 downcasted) {
            downcasted = int184(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(184, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int176 from int256, reverting on
         * overflow (when the input is less than smallest int176 or
         * greater than largest int176).
         *
         * Counterpart to Solidity's `int176` operator.
         *
         * Requirements:
         *
         * - input must fit into 176 bits
         */
        function toInt176(int256 value) internal pure returns (int176 downcasted) {
            downcasted = int176(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(176, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int168 from int256, reverting on
         * overflow (when the input is less than smallest int168 or
         * greater than largest int168).
         *
         * Counterpart to Solidity's `int168` operator.
         *
         * Requirements:
         *
         * - input must fit into 168 bits
         */
        function toInt168(int256 value) internal pure returns (int168 downcasted) {
            downcasted = int168(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(168, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int160 from int256, reverting on
         * overflow (when the input is less than smallest int160 or
         * greater than largest int160).
         *
         * Counterpart to Solidity's `int160` operator.
         *
         * Requirements:
         *
         * - input must fit into 160 bits
         */
        function toInt160(int256 value) internal pure returns (int160 downcasted) {
            downcasted = int160(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(160, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int152 from int256, reverting on
         * overflow (when the input is less than smallest int152 or
         * greater than largest int152).
         *
         * Counterpart to Solidity's `int152` operator.
         *
         * Requirements:
         *
         * - input must fit into 152 bits
         */
        function toInt152(int256 value) internal pure returns (int152 downcasted) {
            downcasted = int152(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(152, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int144 from int256, reverting on
         * overflow (when the input is less than smallest int144 or
         * greater than largest int144).
         *
         * Counterpart to Solidity's `int144` operator.
         *
         * Requirements:
         *
         * - input must fit into 144 bits
         */
        function toInt144(int256 value) internal pure returns (int144 downcasted) {
            downcasted = int144(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(144, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int136 from int256, reverting on
         * overflow (when the input is less than smallest int136 or
         * greater than largest int136).
         *
         * Counterpart to Solidity's `int136` operator.
         *
         * Requirements:
         *
         * - input must fit into 136 bits
         */
        function toInt136(int256 value) internal pure returns (int136 downcasted) {
            downcasted = int136(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(136, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int128 from int256, reverting on
         * overflow (when the input is less than smallest int128 or
         * greater than largest int128).
         *
         * Counterpart to Solidity's `int128` operator.
         *
         * Requirements:
         *
         * - input must fit into 128 bits
         */
        function toInt128(int256 value) internal pure returns (int128 downcasted) {
            downcasted = int128(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(128, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int120 from int256, reverting on
         * overflow (when the input is less than smallest int120 or
         * greater than largest int120).
         *
         * Counterpart to Solidity's `int120` operator.
         *
         * Requirements:
         *
         * - input must fit into 120 bits
         */
        function toInt120(int256 value) internal pure returns (int120 downcasted) {
            downcasted = int120(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(120, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int112 from int256, reverting on
         * overflow (when the input is less than smallest int112 or
         * greater than largest int112).
         *
         * Counterpart to Solidity's `int112` operator.
         *
         * Requirements:
         *
         * - input must fit into 112 bits
         */
        function toInt112(int256 value) internal pure returns (int112 downcasted) {
            downcasted = int112(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(112, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int104 from int256, reverting on
         * overflow (when the input is less than smallest int104 or
         * greater than largest int104).
         *
         * Counterpart to Solidity's `int104` operator.
         *
         * Requirements:
         *
         * - input must fit into 104 bits
         */
        function toInt104(int256 value) internal pure returns (int104 downcasted) {
            downcasted = int104(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(104, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int96 from int256, reverting on
         * overflow (when the input is less than smallest int96 or
         * greater than largest int96).
         *
         * Counterpart to Solidity's `int96` operator.
         *
         * Requirements:
         *
         * - input must fit into 96 bits
         */
        function toInt96(int256 value) internal pure returns (int96 downcasted) {
            downcasted = int96(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(96, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int88 from int256, reverting on
         * overflow (when the input is less than smallest int88 or
         * greater than largest int88).
         *
         * Counterpart to Solidity's `int88` operator.
         *
         * Requirements:
         *
         * - input must fit into 88 bits
         */
        function toInt88(int256 value) internal pure returns (int88 downcasted) {
            downcasted = int88(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(88, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int80 from int256, reverting on
         * overflow (when the input is less than smallest int80 or
         * greater than largest int80).
         *
         * Counterpart to Solidity's `int80` operator.
         *
         * Requirements:
         *
         * - input must fit into 80 bits
         */
        function toInt80(int256 value) internal pure returns (int80 downcasted) {
            downcasted = int80(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(80, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int72 from int256, reverting on
         * overflow (when the input is less than smallest int72 or
         * greater than largest int72).
         *
         * Counterpart to Solidity's `int72` operator.
         *
         * Requirements:
         *
         * - input must fit into 72 bits
         */
        function toInt72(int256 value) internal pure returns (int72 downcasted) {
            downcasted = int72(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(72, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int64 from int256, reverting on
         * overflow (when the input is less than smallest int64 or
         * greater than largest int64).
         *
         * Counterpart to Solidity's `int64` operator.
         *
         * Requirements:
         *
         * - input must fit into 64 bits
         */
        function toInt64(int256 value) internal pure returns (int64 downcasted) {
            downcasted = int64(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(64, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int56 from int256, reverting on
         * overflow (when the input is less than smallest int56 or
         * greater than largest int56).
         *
         * Counterpart to Solidity's `int56` operator.
         *
         * Requirements:
         *
         * - input must fit into 56 bits
         */
        function toInt56(int256 value) internal pure returns (int56 downcasted) {
            downcasted = int56(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(56, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int48 from int256, reverting on
         * overflow (when the input is less than smallest int48 or
         * greater than largest int48).
         *
         * Counterpart to Solidity's `int48` operator.
         *
         * Requirements:
         *
         * - input must fit into 48 bits
         */
        function toInt48(int256 value) internal pure returns (int48 downcasted) {
            downcasted = int48(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(48, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int40 from int256, reverting on
         * overflow (when the input is less than smallest int40 or
         * greater than largest int40).
         *
         * Counterpart to Solidity's `int40` operator.
         *
         * Requirements:
         *
         * - input must fit into 40 bits
         */
        function toInt40(int256 value) internal pure returns (int40 downcasted) {
            downcasted = int40(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(40, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int32 from int256, reverting on
         * overflow (when the input is less than smallest int32 or
         * greater than largest int32).
         *
         * Counterpart to Solidity's `int32` operator.
         *
         * Requirements:
         *
         * - input must fit into 32 bits
         */
        function toInt32(int256 value) internal pure returns (int32 downcasted) {
            downcasted = int32(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(32, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int24 from int256, reverting on
         * overflow (when the input is less than smallest int24 or
         * greater than largest int24).
         *
         * Counterpart to Solidity's `int24` operator.
         *
         * Requirements:
         *
         * - input must fit into 24 bits
         */
        function toInt24(int256 value) internal pure returns (int24 downcasted) {
            downcasted = int24(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(24, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int16 from int256, reverting on
         * overflow (when the input is less than smallest int16 or
         * greater than largest int16).
         *
         * Counterpart to Solidity's `int16` operator.
         *
         * Requirements:
         *
         * - input must fit into 16 bits
         */
        function toInt16(int256 value) internal pure returns (int16 downcasted) {
            downcasted = int16(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(16, value);
            }
        }
    
        /**
         * @dev Returns the downcasted int8 from int256, reverting on
         * overflow (when the input is less than smallest int8 or
         * greater than largest int8).
         *
         * Counterpart to Solidity's `int8` operator.
         *
         * Requirements:
         *
         * - input must fit into 8 bits
         */
        function toInt8(int256 value) internal pure returns (int8 downcasted) {
            downcasted = int8(value);
            if (downcasted != value) {
                revert SafeCastOverflowedIntDowncast(8, value);
            }
        }
    
        /**
         * @dev Converts an unsigned uint256 into a signed int256.
         *
         * Requirements:
         *
         * - input must be less than or equal to maxInt256.
         */
        function toInt256(uint256 value) internal pure returns (int256) {
            // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
            if (value > uint256(type(int256).max)) {
                revert SafeCastOverflowedUintToInt(value);
            }
            return int256(value);
        }
    
        /**
         * @dev Cast a boolean (false or true) to a uint256 (0 or 1) with no jump.
         */
        function toUint(bool b) internal pure returns (uint256 u) {
            assembly ("memory-safe") {
                u := iszero(iszero(b))
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.6.1/utils/math/SignedMath.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.1.0) (utils/math/SignedMath.sol)
    
    pragma solidity ^0.8.20;
    
    import {SafeCast} from "./SafeCast.sol";
    
    /**
     * @dev Standard signed math utilities missing in the Solidity language.
     */
    library SignedMath {
        /**
         * @dev Branchless ternary evaluation for `a ? b : c`. Gas costs are constant.
         *
         * IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone.
         * However, the compiler may optimize Solidity ternary operations (i.e. `a ? b : c`) to only compute
         * one branch when needed, making this function more expensive.
         */
        function ternary(bool condition, int256 a, int256 b) internal pure returns (int256) {
            unchecked {
                // branchless ternary works because:
                // b ^ (a ^ b) == a
                // b ^ 0 == b
                return b ^ ((a ^ b) * int256(SafeCast.toUint(condition)));
            }
        }
    
        /**
         * @dev Returns the largest of two signed numbers.
         */
        function max(int256 a, int256 b) internal pure returns (int256) {
            return ternary(a > b, a, b);
        }
    
        /**
         * @dev Returns the smallest of two signed numbers.
         */
        function min(int256 a, int256 b) internal pure returns (int256) {
            return ternary(a < b, a, b);
        }
    
        /**
         * @dev Returns the average of two signed numbers without overflow.
         * The result is rounded towards zero.
         */
        function average(int256 a, int256 b) internal pure returns (int256) {
            // Formula from the book "Hacker's Delight"
            int256 x = (a & b) + ((a ^ b) >> 1);
            return x + (int256(uint256(x) >> 255) & (a ^ b));
        }
    
        /**
         * @dev Returns the absolute unsigned value of a signed value.
         */
        function abs(int256 n) internal pure returns (uint256) {
            unchecked {
                // Formula from the "Bit Twiddling Hacks" by Sean Eron Anderson.
                // Since `n` is a signed integer, the generated bytecode will use the SAR opcode to perform the right shift,
                // taking advantage of the most significant (or "sign" bit) in two's complement representation.
                // This opcode adds new most significant bits set to the value of the previous most significant bit. As a result,
                // the mask will either be `bytes32(0)` (if n is positive) or `~bytes32(0)` (if n is negative).
                int256 mask = n >> 255;
    
                // A `bytes32(0)` mask leaves the input unchanged, while a `~bytes32(0)` mask complements it.
                return uint256((n + mask) ^ mask);
            }
        }
    }
    
  • project/contracts/interfaces/IArkadaConfig.sol
    // SPDX-License-Identifier: MIT
    pragma solidity 0.8.28;
    
    /// @title IArkadaConfig
    /// @notice Read side of the system-wide configuration registry every other
    /// contract depends on: roles, payout addresses and economic parameters.
    /// @dev Deployed once per network behind a UUPS proxy. Consumers hold the proxy
    /// address, so parameter changes take effect everywhere without redeployment.
    interface IArkadaConfig {
        /// @notice Checks whether an account holds a role.
        /// @param role Role identifier, `keccak256("<NAME>_ROLE")`.
        /// @param account Address to check.
        /// @return True if the account currently holds the role.
        function hasRole(bytes32 role, address account) external view returns (bool);
    
        /// @notice Destination for all protocol revenue.
        /// @return Treasury address.
        function treasury() external view returns (address);
    
        /// @notice Reward pool that funds action rewards and retro claims.
        /// @return Vault address, or the zero address if not configured yet.
        function rewardVault() external view returns (address);
    
        /// @notice Single contract every system event is emitted through.
        /// @return Hub address, or the zero address if not configured yet.
        function eventHub() external view returns (address);
    
        /// @notice Share of each action payment routed to the reward vault.
        /// @return Share in basis points of 10000.
        function rewardPoolBps() external view returns (uint16);
    
        /// @notice Share of a collection mint price taken as protocol fee.
        /// @dev A share of the price, not a surcharge on top of it.
        /// @return Share in basis points of 10000.
        function mintFeeBps() external view returns (uint16);
    
        /// @notice Absolute floor for the collection mint fee.
        /// @dev Also raises the mint price when it would otherwise fall below the
        /// floor, which is what keeps a creator from making mints free.
        /// @return Floor in wei.
        function minMintFee() external view returns (uint256);
    
        /// @notice Metadata URI shared by every ArkadaTicket token.
        /// @return The URI.
        function ticketTokenURI() external view returns (string memory);
    }
    
  • project/contracts/interfaces/ICollectionReporter.sol
    // SPDX-License-Identifier: MIT
    pragma solidity 0.8.28;
    
    /// @title ICollectionReporter
    /// @notice Bridge a collection instance uses to reach `ArkadaEventHub`.
    /// @dev Collection instances are created on the fly and therefore cannot hold
    /// `EMITTER_ROLE`. They report to the factory that created them instead, and the
    /// factory — a trusted emitter — forwards to the hub. The trust anchor is the
    /// factory's own `isCollection` registry.
    interface ICollectionReporter {
        /// @notice Reports a completed mint so the factory can log it to the hub.
        /// @dev Callable only by a collection in the factory's registry.
        /// @param minter Account that received the tokens.
        /// @param quantity Number of tokens minted in this call.
        /// @param firstTokenId Id of the first token of the batch.
        /// @param pricePaid Portion of the payment kept as creator revenue.
        /// @param feePaid Portion of the payment forwarded to the treasury.
        function recordMint(
            address minter,
            uint256 quantity,
            uint256 firstTokenId,
            uint256 pricePaid,
            uint256 feePaid
        ) external;
    }
    
ABI · 59 entries
json
[
  {
    "type": "constructor",
    "inputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "ERC2981InvalidDefaultRoyalty",
    "type": "error",
    "inputs": [
      {
        "name": "numerator",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "denominator",
        "type": "uint256",
        "internalType": "uint256"
      }
    ]
  },
  {
    "name": "ERC2981InvalidDefaultRoyaltyReceiver",
    "type": "error",
    "inputs": [
      {
        "name": "receiver",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "ERC2981InvalidTokenRoyalty",
    "type": "error",
    "inputs": [
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "numerator",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "denominator",
        "type": "uint256",
        "internalType": "uint256"
      }
    ]
  },
  {
    "name": "ERC2981InvalidTokenRoyaltyReceiver",
    "type": "error",
    "inputs": [
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "receiver",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "ERC721IncorrectOwner",
    "type": "error",
    "inputs": [
      {
        "name": "sender",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "owner",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "ERC721InsufficientApproval",
    "type": "error",
    "inputs": [
      {
        "name": "operator",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ]
  },
  {
    "name": "ERC721InvalidApprover",
    "type": "error",
    "inputs": [
      {
        "name": "approver",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "ERC721InvalidOperator",
    "type": "error",
    "inputs": [
      {
        "name": "operator",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "ERC721InvalidOwner",
    "type": "error",
    "inputs": [
      {
        "name": "owner",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "ERC721InvalidReceiver",
    "type": "error",
    "inputs": [
      {
        "name": "receiver",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "ERC721InvalidSender",
    "type": "error",
    "inputs": [
      {
        "name": "sender",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "ERC721NonexistentToken",
    "type": "error",
    "inputs": [
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ]
  },
  {
    "name": "ExceedsSupply",
    "type": "error",
    "inputs": []
  },
  {
    "name": "InsufficientPayment",
    "type": "error",
    "inputs": []
  },
  {
    "name": "InvalidInitialization",
    "type": "error",
    "inputs": []
  },
  {
    "name": "NoFunds",
    "type": "error",
    "inputs": []
  },
  {
    "name": "NotInitializing",
    "type": "error",
    "inputs": []
  },
  {
    "name": "OwnableInvalidOwner",
    "type": "error",
    "inputs": [
      {
        "name": "owner",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "OwnableUnauthorizedAccount",
    "type": "error",
    "inputs": [
      {
        "name": "account",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "ReentrancyGuardReentrantCall",
    "type": "error",
    "inputs": []
  },
  {
    "name": "Soulbound",
    "type": "error",
    "inputs": []
  },
  {
    "name": "TransferFailed",
    "type": "error",
    "inputs": []
  },
  {
    "name": "ZeroQuantity",
    "type": "error",
    "inputs": []
  },
  {
    "name": "Approval",
    "type": "event",
    "inputs": [
      {
        "name": "owner",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "approved",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "tokenId",
        "type": "uint256",
        "indexed": true,
        "internalType": "uint256"
      }
    ],
    "anonymous": false
  },
  {
    "name": "ApprovalForAll",
    "type": "event",
    "inputs": [
      {
        "name": "owner",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "operator",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "approved",
        "type": "bool",
        "indexed": false,
        "internalType": "bool"
      }
    ],
    "anonymous": false
  },
  {
    "name": "Initialized",
    "type": "event",
    "inputs": [
      {
        "name": "version",
        "type": "uint64",
        "indexed": false,
        "internalType": "uint64"
      }
    ],
    "anonymous": false
  },
  {
    "name": "OwnershipTransferred",
    "type": "event",
    "inputs": [
      {
        "name": "previousOwner",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "newOwner",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      }
    ],
    "anonymous": false
  },
  {
    "name": "Transfer",
    "type": "event",
    "inputs": [
      {
        "name": "from",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "to",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "tokenId",
        "type": "uint256",
        "indexed": true,
        "internalType": "uint256"
      }
    ],
    "anonymous": false
  },
  {
    "name": "approve",
    "type": "function",
    "inputs": [
      {
        "name": "to",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "balanceOf",
    "type": "function",
    "inputs": [
      {
        "name": "owner",
        "type": "address",
        "internalType": "address"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "config",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "contract IArkadaConfig"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "factory",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "contract ICollectionReporter"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "feePerToken",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "getApproved",
    "type": "function",
    "inputs": [
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "initialize",
    "type": "function",
    "inputs": [
      {
        "name": "p",
        "type": "tuple",
        "components": [
          {
            "name": "name",
            "type": "string",
            "internalType": "string"
          },
          {
            "name": "symbol",
            "type": "string",
            "internalType": "string"
          },
          {
            "name": "tokenURI",
            "type": "string",
            "internalType": "string"
          },
          {
            "name": "maxSupply",
            "type": "uint256",
            "internalType": "uint256"
          },
          {
            "name": "royaltyBps",
            "type": "uint96",
            "internalType": "uint96"
          },
          {
            "name": "soulbound",
            "type": "bool",
            "internalType": "bool"
          },
          {
            "name": "mintPriceWei",
            "type": "uint256",
            "internalType": "uint256"
          }
        ],
        "internalType": "struct CreateParams"
      },
      {
        "name": "creator",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "config_",
        "type": "address",
        "internalType": "contract IArkadaConfig"
      },
      {
        "name": "factory_",
        "type": "address",
        "internalType": "contract ICollectionReporter"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "isApprovedForAll",
    "type": "function",
    "inputs": [
      {
        "name": "owner",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "operator",
        "type": "address",
        "internalType": "address"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "bool",
        "internalType": "bool"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "maxSupply",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "mint",
    "type": "function",
    "inputs": [
      {
        "name": "qty",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [],
    "stateMutability": "payable"
  },
  {
    "name": "mintPrice",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "name",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "string",
        "internalType": "string"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "owner",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "ownerOf",
    "type": "function",
    "inputs": [
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "pricePerToken",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "renounceOwnership",
    "type": "function",
    "inputs": [],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "royaltyInfo",
    "type": "function",
    "inputs": [
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "salePrice",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [
      {
        "name": "receiver",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "amount",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "safeTransferFrom",
    "type": "function",
    "inputs": [
      {
        "name": "from",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "to",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "safeTransferFrom",
    "type": "function",
    "inputs": [
      {
        "name": "from",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "to",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "data",
        "type": "bytes",
        "internalType": "bytes"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "setApprovalForAll",
    "type": "function",
    "inputs": [
      {
        "name": "operator",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "approved",
        "type": "bool",
        "internalType": "bool"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "soulbound",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "bool",
        "internalType": "bool"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "supportsInterface",
    "type": "function",
    "inputs": [
      {
        "name": "id",
        "type": "bytes4",
        "internalType": "bytes4"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "bool",
        "internalType": "bool"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "symbol",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "string",
        "internalType": "string"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "tokenURI",
    "type": "function",
    "inputs": [
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "string",
        "internalType": "string"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "totalMintCost",
    "type": "function",
    "inputs": [
      {
        "name": "qty",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "totalSupply",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "transferFrom",
    "type": "function",
    "inputs": [
      {
        "name": "from",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "to",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "transferOwnership",
    "type": "function",
    "inputs": [
      {
        "name": "newOwner",
        "type": "address",
        "internalType": "address"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "withdraw",
    "type": "function",
    "inputs": [],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "type": "receive",
    "stateMutability": "payable"
  }
]