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Contract

0x5B87F96921583df7C640d438bf92b247D04a9ACf

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Type
Contract · 12,533 bytes of code

DecentralizedCommunity Verified

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

project/contracts/DecentralizedCommunity.sol

and 29 more files

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

import "@openzeppelin/contracts-upgradeable/token/ERC721/ERC721Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/cryptography/EIP712Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/utils/Strings.sol";

interface IDecentralizedIdentity {
    function hasIdentity(address owner) external view returns (bool);
    function getIdentityId(address owner) external view returns (uint256);
}

/**
 * @title DecentralizedCommunity
 * @dev Community management system using ERC721 for community tokens + mapping for memberships
 * Each community is represented as an ERC721 NFT, memberships tracked via mapping
 * Uses EIP-712 for structured signature verification with backend-controlled claiming
 *
 * Key Features:
 * - Each community = 1 ERC721 NFT (minted when creator claims it on-chain)
 * - Communities exist in database first, claimed to blockchain later (OPTIONAL)
 * - Users can join UNCLAIMED communities - claiming happens later if desired
 * - Backend signature required to claim community (verifies ownership)
 * - Backend signature required to join (verifies community exists in DB)
 * - Membership tracking via simple mapping (gas efficient)
 * - AccessControl for role-based permissions (ADMIN_ROLE, BACKEND_SIGNER_ROLE)
 * - Gas sponsorship support (relayer can pay gas for claiming/joining)
 * - Requires users to have a DID from DecentralizedIdentity contract (for joining)
 * - Community tokens are soulbound (non-transferable)
 * - Memberships are PERMANENT - once joined, cannot leave or be removed
 * - Community DIDs generated OFF-CHAIN from: creatorAddress + communityId + "c"
 *
 * Flow:
 * 1. Community created in database → Generate DID off-chain (see scripts/generate-community-did.ts)
 * 2. Users can join immediately (stored on-chain via mapping)
 * 3. Creator optionally claims community on-chain → Mints NFT + stores metadata
 */
contract DecentralizedCommunity is
    Initializable,
    ERC721Upgradeable,
    EIP712Upgradeable,
    AccessControlUpgradeable,
    UUPSUpgradeable
{
    using ECDSA for bytes32;

    // Roles
    bytes32 public constant ADMIN_ROLE = keccak256("ADMIN_ROLE");
    bytes32 public constant BACKEND_SIGNER_ROLE = keccak256("BACKEND_SIGNER_ROLE");

    // Community metadata
    struct CommunityData {
        string name;           // Community name
        address creator;       // Community creator/owner
        uint256 createdAt;     // Creation timestamp
        bool exists;           // Community exists flag
    }

    // Reference to DecentralizedIdentity contract
    IDecentralizedIdentity public didContract;

    // Mapping from community ID to community data
    mapping(uint256 => CommunityData) public communities;

    // Membership tracking: communityId => user => isMember
    mapping(uint256 => mapping(address => bool)) public memberships;

    // Backend signer address (authorized to sign join permissions)
    address public backendSigner;

    // Base URI for off-chain metadata
    string private _baseTokenURI;

    // EIP-712 type hash for ClaimCommunity
    bytes32 private constant CLAIM_COMMUNITY_TYPEHASH =
        keccak256("ClaimCommunity(address creator,uint256 communityId,string name,uint256 timestamp)");

    // EIP-712 type hash for JoinCommunity
    bytes32 private constant JOIN_COMMUNITY_TYPEHASH =
        keccak256("JoinCommunity(address user,uint256 communityId,uint256 timestamp)");

    error TokenNotTransferable();
    error NoIdentityFound();
    error InvalidSignature();
    error ExpiredSignature();
    error InvalidBackendSigner();
    error AlreadyMember();
    error CommunityNotFound();
    error CommunityAlreadyExists();
    error InvalidCommunityId();

    event CommunityCreated(uint256 indexed communityId, string name, address indexed creator, uint256 timestamp);
    event CommunityJoined(uint256 indexed communityId, address indexed user, uint256 timestamp);
    event BackendSignerUpdated(address indexed oldSigner, address indexed newSigner);
    event BaseURIUpdated(string newBaseURI);

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() {
        _disableInitializers();
    }

    function initialize(
        address _didContract,
        address _backendSigner,
        string memory initialBaseURI
    ) public initializer {
        if (_didContract == address(0) || _backendSigner == address(0)) {
            revert InvalidBackendSigner();
        }

        __ERC721_init("DecentralizedCommunity", "COMMUNITY");
        __EIP712_init("DecentralizedCommunity", "1");
        __AccessControl_init();
        __UUPSUpgradeable_init();

        didContract = IDecentralizedIdentity(_didContract);
        backendSigner = _backendSigner;
        _baseTokenURI = initialBaseURI;

        // Setup roles
        _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _grantRole(ADMIN_ROLE, msg.sender);
        _grantRole(BACKEND_SIGNER_ROLE, _backendSigner);
    }

    /**
     * @dev Claim a community (mint community NFT) using backend signature
     * Backend verifies the user is the community owner in the database
     * Supports gas sponsorship: anyone can submit this transaction on behalf of the creator
     *
     * @param creator Address that will receive the community NFT (must be community owner)
     * @param communityId Unique community identifier from database (token ID)
     * @param name Community name
     * @param timestamp Signature timestamp (must be recent)
     * @param signature Backend's EIP-712 signature
     *
     * SECURITY: Backend MUST verify that the creator actually owns the community
     * in the database before signing. Otherwise, anyone could claim any community.
     */
    function claimCommunity(
        address creator,
        uint256 communityId,
        string calldata name,
        uint256 timestamp,
        bytes calldata signature
    ) external returns (uint256) {
        // Validate community ID (must not be 0)
        if (communityId == 0) {
            revert InvalidCommunityId();
        }

        // Check if community already exists
        if (communities[communityId].exists) {
            revert CommunityAlreadyExists();
        }

        // Check timestamp is not too old (5 minutes)
        // Check this BEFORE signature verification (cheaper operation first)
        if (block.timestamp > timestamp + 300) {
            revert ExpiredSignature();
        }

        // Verify EIP-712 signature from backend
        // Signature includes creator address, so it's bound to the community owner
        bytes32 structHash = keccak256(
            abi.encode(CLAIM_COMMUNITY_TYPEHASH, creator, communityId, keccak256(bytes(name)), timestamp)
        );
        bytes32 digest = _hashTypedDataV4(structHash);

        (address signer, ECDSA.RecoverError error,) = ECDSA.tryRecover(digest, signature);
        if (error != ECDSA.RecoverError.NoError || signer != backendSigner) {
            revert InvalidSignature();
        }

        // Create community metadata
        communities[communityId] = CommunityData({
            name: name,
            creator: creator,
            createdAt: block.timestamp,
            exists: true
        });

        // Mint community NFT to creator
        _safeMint(creator, communityId);

        emit CommunityCreated(communityId, name, creator, block.timestamp);

        return communityId;
    }


    /**
     * @dev Join a community using backend signature
     * Backend verifies requirements (XP, badges, etc.) and signs permission
     * Supports gas sponsorship: anyone can submit this transaction on behalf of the user
     * Community does NOT need to be claimed on-chain first - can join unclaimed communities
     *
     * @param user Address of the user joining the community
     * @param communityId Community ID to join (from database)
     * @param timestamp Signature timestamp (must be recent)
     * @param signature Backend's EIP-712 signature
     *
     * SECURITY: Backend MUST verify:
     * 1. The community exists in the database
     * 2. The user meets requirements to join
     * 3. The signature came from the `user` address
     */
    function joinCommunity(
        address user,
        uint256 communityId,
        uint256 timestamp,
        bytes calldata signature
    ) external {
        // Check if user has a DID
        if (!didContract.hasIdentity(user)) {
            revert NoIdentityFound();
        }

        // Check if already a member
        if (memberships[communityId][user]) {
            revert AlreadyMember();
        }

        // Check timestamp is not too old (5 minutes)
        // Check this BEFORE signature verification (cheaper operation first)
        if (block.timestamp > timestamp + 300) {
            revert ExpiredSignature();
        }

        // Verify EIP-712 signature from backend
        // Signature includes `user` address, so it's bound to the specific user
        // Backend verifies community exists in database before signing
        bytes32 structHash = keccak256(
            abi.encode(JOIN_COMMUNITY_TYPEHASH, user, communityId, timestamp)
        );
        bytes32 digest = _hashTypedDataV4(structHash);

        (address signer, ECDSA.RecoverError error,) = ECDSA.tryRecover(digest, signature);
        if (error != ECDSA.RecoverError.NoError || signer != backendSigner) {
            revert InvalidSignature();
        }

        // Add user to community membership
        memberships[communityId][user] = true;

        emit CommunityJoined(communityId, user, block.timestamp);
    }

    /**
     * @dev Check if a user is a member of a community
     * @param user Address to check
     * @param communityId Community ID to check
     * @return True if the user is a member of the community
     */
    function isMember(address user, uint256 communityId) external view returns (bool) {
        return memberships[communityId][user];
    }

    /**
     * @dev Get community information
     * @param communityId Community ID to query
     * @return name Community name
     * @return creator Community creator address
     * @return createdAt Creation timestamp
     * @return exists Whether the community exists
     */
    function getCommunity(uint256 communityId) external view returns (
        string memory name,
        address creator,
        uint256 createdAt,
        bool exists
    ) {
        CommunityData memory data = communities[communityId];
        return (data.name, data.creator, data.createdAt, data.exists);
    }


    /**
     * @dev Get the token URI for a given community token
     * Points to off-chain metadata API: baseURI + communityId
     * @param communityId Community token ID to query
     * @return URI string
     */
    function tokenURI(uint256 communityId) public view override returns (string memory) {
        if (!communities[communityId].exists) {
            revert CommunityNotFound();
        }
        return string.concat(_baseTokenURI, Strings.toString(communityId));
    }

    /**
     * @dev Update the base URI for metadata
     * @param newBaseURI New base URI (e.g., "https://api.foru.ai/v1/community/metadata/")
     */
    function setBaseURI(string calldata newBaseURI) external onlyRole(ADMIN_ROLE) {
        _baseTokenURI = newBaseURI;
        emit BaseURIUpdated(newBaseURI);
    }

    /**
     * @dev Update the backend signer address
     * @param newSigner New backend signer address
     */
    function setBackendSigner(address newSigner) external onlyRole(ADMIN_ROLE) {
        if (newSigner == address(0)) {
            revert InvalidBackendSigner();
        }

        address oldSigner = backendSigner;

        // Revoke old signer role
        _revokeRole(BACKEND_SIGNER_ROLE, oldSigner);

        // Grant new signer role
        _grantRole(BACKEND_SIGNER_ROLE, newSigner);

        backendSigner = newSigner;
        emit BackendSignerUpdated(oldSigner, newSigner);
    }

    /**
     * @dev Update the DID contract reference
     * @param newDIDContract New DID contract address
     */
    function setDIDContract(address newDIDContract) external onlyRole(ADMIN_ROLE) {
        if (newDIDContract == address(0)) {
            revert InvalidBackendSigner();
        }
        didContract = IDecentralizedIdentity(newDIDContract);
    }

    /**
     * @dev Get the base URI
     * @return Base URI string
     */
    function baseURI() external view returns (string memory) {
        return _baseTokenURI;
    }

    // Override transfer functions to make tokens non-transferable (Soulbound)

    /**
     * @dev Override transferFrom to prevent transfers
     */
    function transferFrom(address /*from*/, address /*to*/, uint256 /*tokenId*/) public pure override {
        revert TokenNotTransferable();
    }

    /**
     * @dev Override safeTransferFrom to prevent transfers
     */
    function safeTransferFrom(address /*from*/, address /*to*/, uint256 /*tokenId*/, bytes memory /*data*/) public pure override {
        revert TokenNotTransferable();
    }

    /**
     * @dev Override approve to prevent approvals (no point if can't transfer)
     */
    function approve(address /*to*/, uint256 /*tokenId*/) public pure override {
        revert TokenNotTransferable();
    }

    /**
     * @dev Override setApprovalForAll to prevent approvals
     */
    function setApprovalForAll(address /*operator*/, bool /*approved*/) public pure override {
        revert TokenNotTransferable();
    }

    /**
     * @dev See {IERC165-supportsInterface}
     * Override to include AccessControl interface
     */
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC721Upgradeable, AccessControlUpgradeable)
        returns (bool)
    {
        return super.supportsInterface(interfaceId);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract
     * Called by {upgradeToAndCall}. Only ADMIN_ROLE can upgrade the contract.
     */
    function _authorizeUpgrade(address newImplementation) internal override onlyRole(ADMIN_ROLE) {}
}

Other files

  • npm/@openzeppelin/contracts-upgradeable@5.4.0/access/AccessControlUpgradeable.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (access/AccessControl.sol)
    
    pragma solidity ^0.8.20;
    
    import {IAccessControl} from "@openzeppelin/contracts/access/IAccessControl.sol";
    import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
    import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
    import {ERC165Upgradeable} from "../utils/introspection/ERC165Upgradeable.sol";
    import {Initializable} from "../proxy/utils/Initializable.sol";
    
    /**
     * @dev Contract module that allows children to implement role-based access
     * control mechanisms. This is a lightweight version that doesn't allow enumerating role
     * members except through off-chain means by accessing the contract event logs. Some
     * applications may benefit from on-chain enumerability, for those cases see
     * {AccessControlEnumerable}.
     *
     * Roles are referred to by their `bytes32` identifier. These should be exposed
     * in the external API and be unique. The best way to achieve this is by
     * using `public constant` hash digests:
     *
     * ```solidity
     * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
     * ```
     *
     * Roles can be used to represent a set of permissions. To restrict access to a
     * function call, use {hasRole}:
     *
     * ```solidity
     * function foo() public {
     *     require(hasRole(MY_ROLE, msg.sender));
     *     ...
     * }
     * ```
     *
     * Roles can be granted and revoked dynamically via the {grantRole} and
     * {revokeRole} functions. Each role has an associated admin role, and only
     * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
     *
     * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
     * that only accounts with this role will be able to grant or revoke other
     * roles. More complex role relationships can be created by using
     * {_setRoleAdmin}.
     *
     * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
     * grant and revoke this role. Extra precautions should be taken to secure
     * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
     * to enforce additional security measures for this role.
     */
    abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControl, ERC165Upgradeable {
        struct RoleData {
            mapping(address account => bool) hasRole;
            bytes32 adminRole;
        }
    
        bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
    
    
        /// @custom:storage-location erc7201:openzeppelin.storage.AccessControl
        struct AccessControlStorage {
            mapping(bytes32 role => RoleData) _roles;
        }
    
        // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.AccessControl")) - 1)) & ~bytes32(uint256(0xff))
        bytes32 private constant AccessControlStorageLocation = 0x02dd7bc7dec4dceedda775e58dd541e08a116c6c53815c0bd028192f7b626800;
    
        function _getAccessControlStorage() private pure returns (AccessControlStorage storage $) {
            assembly {
                $.slot := AccessControlStorageLocation
            }
        }
    
        /**
         * @dev Modifier that checks that an account has a specific role. Reverts
         * with an {AccessControlUnauthorizedAccount} error including the required role.
         */
        modifier onlyRole(bytes32 role) {
            _checkRole(role);
            _;
        }
    
        function __AccessControl_init() internal onlyInitializing {
        }
    
        function __AccessControl_init_unchained() internal onlyInitializing {
        }
        /// @inheritdoc IERC165
        function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
            return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
        }
    
        /**
         * @dev Returns `true` if `account` has been granted `role`.
         */
        function hasRole(bytes32 role, address account) public view virtual returns (bool) {
            AccessControlStorage storage $ = _getAccessControlStorage();
            return $._roles[role].hasRole[account];
        }
    
        /**
         * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `_msgSender()`
         * is missing `role`. Overriding this function changes the behavior of the {onlyRole} modifier.
         */
        function _checkRole(bytes32 role) internal view virtual {
            _checkRole(role, _msgSender());
        }
    
        /**
         * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `account`
         * is missing `role`.
         */
        function _checkRole(bytes32 role, address account) internal view virtual {
            if (!hasRole(role, account)) {
                revert AccessControlUnauthorizedAccount(account, role);
            }
        }
    
        /**
         * @dev Returns the admin role that controls `role`. See {grantRole} and
         * {revokeRole}.
         *
         * To change a role's admin, use {_setRoleAdmin}.
         */
        function getRoleAdmin(bytes32 role) public view virtual returns (bytes32) {
            AccessControlStorage storage $ = _getAccessControlStorage();
            return $._roles[role].adminRole;
        }
    
        /**
         * @dev Grants `role` to `account`.
         *
         * If `account` had not been already granted `role`, emits a {RoleGranted}
         * event.
         *
         * Requirements:
         *
         * - the caller must have ``role``'s admin role.
         *
         * May emit a {RoleGranted} event.
         */
        function grantRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) {
            _grantRole(role, account);
        }
    
        /**
         * @dev Revokes `role` from `account`.
         *
         * If `account` had been granted `role`, emits a {RoleRevoked} event.
         *
         * Requirements:
         *
         * - the caller must have ``role``'s admin role.
         *
         * May emit a {RoleRevoked} event.
         */
        function revokeRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) {
            _revokeRole(role, account);
        }
    
        /**
         * @dev Revokes `role` from the calling account.
         *
         * Roles are often managed via {grantRole} and {revokeRole}: this function's
         * purpose is to provide a mechanism for accounts to lose their privileges
         * if they are compromised (such as when a trusted device is misplaced).
         *
         * If the calling account had been revoked `role`, emits a {RoleRevoked}
         * event.
         *
         * Requirements:
         *
         * - the caller must be `callerConfirmation`.
         *
         * May emit a {RoleRevoked} event.
         */
        function renounceRole(bytes32 role, address callerConfirmation) public virtual {
            if (callerConfirmation != _msgSender()) {
                revert AccessControlBadConfirmation();
            }
    
            _revokeRole(role, callerConfirmation);
        }
    
        /**
         * @dev Sets `adminRole` as ``role``'s admin role.
         *
         * Emits a {RoleAdminChanged} event.
         */
        function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
            AccessControlStorage storage $ = _getAccessControlStorage();
            bytes32 previousAdminRole = getRoleAdmin(role);
            $._roles[role].adminRole = adminRole;
            emit RoleAdminChanged(role, previousAdminRole, adminRole);
        }
    
        /**
         * @dev Attempts to grant `role` to `account` and returns a boolean indicating if `role` was granted.
         *
         * Internal function without access restriction.
         *
         * May emit a {RoleGranted} event.
         */
        function _grantRole(bytes32 role, address account) internal virtual returns (bool) {
            AccessControlStorage storage $ = _getAccessControlStorage();
            if (!hasRole(role, account)) {
                $._roles[role].hasRole[account] = true;
                emit RoleGranted(role, account, _msgSender());
                return true;
            } else {
                return false;
            }
        }
    
        /**
         * @dev Attempts to revoke `role` from `account` and returns a boolean indicating if `role` was revoked.
         *
         * Internal function without access restriction.
         *
         * May emit a {RoleRevoked} event.
         */
        function _revokeRole(bytes32 role, address account) internal virtual returns (bool) {
            AccessControlStorage storage $ = _getAccessControlStorage();
            if (hasRole(role, account)) {
                $._roles[role].hasRole[account] = false;
                emit RoleRevoked(role, account, _msgSender());
                return true;
            } else {
                return false;
            }
        }
    }
    
  • npm/@openzeppelin/contracts-upgradeable@5.4.0/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-upgradeable@5.4.0/proxy/utils/UUPSUpgradeable.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.3.0) (proxy/utils/UUPSUpgradeable.sol)
    
    pragma solidity ^0.8.22;
    
    import {IERC1822Proxiable} from "@openzeppelin/contracts/interfaces/draft-IERC1822.sol";
    import {ERC1967Utils} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Utils.sol";
    import {Initializable} from "./Initializable.sol";
    
    /**
     * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
     * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
     *
     * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
     * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
     * `UUPSUpgradeable` with a custom implementation of upgrades.
     *
     * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
     */
    abstract contract UUPSUpgradeable is Initializable, IERC1822Proxiable {
        /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
        address private immutable __self = address(this);
    
        /**
         * @dev The version of the upgrade interface of the contract. If this getter is missing, both `upgradeTo(address)`
         * and `upgradeToAndCall(address,bytes)` are present, and `upgradeTo` must be used if no function should be called,
         * while `upgradeToAndCall` will invoke the `receive` function if the second argument is the empty byte string.
         * If the getter returns `"5.0.0"`, only `upgradeToAndCall(address,bytes)` is present, and the second argument must
         * be the empty byte string if no function should be called, making it impossible to invoke the `receive` function
         * during an upgrade.
         */
        string public constant UPGRADE_INTERFACE_VERSION = "5.0.0";
    
        /**
         * @dev The call is from an unauthorized context.
         */
        error UUPSUnauthorizedCallContext();
    
        /**
         * @dev The storage `slot` is unsupported as a UUID.
         */
        error UUPSUnsupportedProxiableUUID(bytes32 slot);
    
        /**
         * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
         * a proxy contract with an implementation (as defined in ERC-1967) pointing to self. This should only be the case
         * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
         * function through ERC-1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
         * fail.
         */
        modifier onlyProxy() {
            _checkProxy();
            _;
        }
    
        /**
         * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
         * callable on the implementing contract but not through proxies.
         */
        modifier notDelegated() {
            _checkNotDelegated();
            _;
        }
    
        function __UUPSUpgradeable_init() internal onlyInitializing {
        }
    
        function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
        }
        /**
         * @dev Implementation of the ERC-1822 {proxiableUUID} function. This returns the storage slot used by the
         * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
         *
         * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
         * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
         * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
         */
        function proxiableUUID() external view virtual notDelegated returns (bytes32) {
            return ERC1967Utils.IMPLEMENTATION_SLOT;
        }
    
        /**
         * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
         * encoded in `data`.
         *
         * Calls {_authorizeUpgrade}.
         *
         * Emits an {Upgraded} event.
         *
         * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
         */
        function upgradeToAndCall(address newImplementation, bytes memory data) public payable virtual onlyProxy {
            _authorizeUpgrade(newImplementation);
            _upgradeToAndCallUUPS(newImplementation, data);
        }
    
        /**
         * @dev Reverts if the execution is not performed via delegatecall or the execution
         * context is not of a proxy with an ERC-1967 compliant implementation pointing to self.
         */
        function _checkProxy() internal view virtual {
            if (
                address(this) == __self || // Must be called through delegatecall
                ERC1967Utils.getImplementation() != __self // Must be called through an active proxy
            ) {
                revert UUPSUnauthorizedCallContext();
            }
        }
    
        /**
         * @dev Reverts if the execution is performed via delegatecall.
         * See {notDelegated}.
         */
        function _checkNotDelegated() internal view virtual {
            if (address(this) != __self) {
                // Must not be called through delegatecall
                revert UUPSUnauthorizedCallContext();
            }
        }
    
        /**
         * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
         * {upgradeToAndCall}.
         *
         * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
         *
         * ```solidity
         * function _authorizeUpgrade(address) internal onlyOwner {}
         * ```
         */
        function _authorizeUpgrade(address newImplementation) internal virtual;
    
        /**
         * @dev Performs an implementation upgrade with a security check for UUPS proxies, and additional setup call.
         *
         * As a security check, {proxiableUUID} is invoked in the new implementation, and the return value
         * is expected to be the implementation slot in ERC-1967.
         *
         * Emits an {IERC1967-Upgraded} event.
         */
        function _upgradeToAndCallUUPS(address newImplementation, bytes memory data) private {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                if (slot != ERC1967Utils.IMPLEMENTATION_SLOT) {
                    revert UUPSUnsupportedProxiableUUID(slot);
                }
                ERC1967Utils.upgradeToAndCall(newImplementation, data);
            } catch {
                // The implementation is not UUPS
                revert ERC1967Utils.ERC1967InvalidImplementation(newImplementation);
            }
        }
    }
    
  • npm/@openzeppelin/contracts-upgradeable@5.4.0/token/ERC721/ERC721Upgradeable.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/ERC721.sol)
    
    pragma solidity ^0.8.20;
    
    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 "../../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 (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@5.4.0/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 "../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@5.4.0/utils/cryptography/EIP712Upgradeable.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (utils/cryptography/EIP712.sol)
    
    pragma solidity ^0.8.20;
    
    import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol";
    import {IERC5267} from "@openzeppelin/contracts/interfaces/IERC5267.sol";
    import {Initializable} from "../../proxy/utils/Initializable.sol";
    
    /**
     * @dev https://eips.ethereum.org/EIPS/eip-712[EIP-712] is a standard for hashing and signing of typed structured data.
     *
     * The encoding scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose
     * encoding is very generic and therefore its implementation in Solidity is not feasible, thus this contract
     * does not implement the encoding itself. Protocols need to implement the type-specific encoding they need in order to
     * produce the hash of their typed data using a combination of `abi.encode` and `keccak256`.
     *
     * This contract implements the EIP-712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
     * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
     * ({_hashTypedDataV4}).
     *
     * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
     * the chain id to protect against replay attacks on an eventual fork of the chain.
     *
     * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
     * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
     *
     * NOTE: The upgradeable version of this contract does not use an immutable cache and recomputes the domain separator
     * each time {_domainSeparatorV4} is called. That is cheaper than accessing a cached version in cold storage.
     */
    abstract contract EIP712Upgradeable is Initializable, IERC5267 {
        bytes32 private constant TYPE_HASH =
            keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
    
        /// @custom:storage-location erc7201:openzeppelin.storage.EIP712
        struct EIP712Storage {
            /// @custom:oz-renamed-from _HASHED_NAME
            bytes32 _hashedName;
            /// @custom:oz-renamed-from _HASHED_VERSION
            bytes32 _hashedVersion;
    
            string _name;
            string _version;
        }
    
        // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.EIP712")) - 1)) & ~bytes32(uint256(0xff))
        bytes32 private constant EIP712StorageLocation = 0xa16a46d94261c7517cc8ff89f61c0ce93598e3c849801011dee649a6a557d100;
    
        function _getEIP712Storage() private pure returns (EIP712Storage storage $) {
            assembly {
                $.slot := EIP712StorageLocation
            }
        }
    
        /**
         * @dev Initializes the domain separator and parameter caches.
         *
         * The meaning of `name` and `version` is specified in
         * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP-712]:
         *
         * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
         * - `version`: the current major version of the signing domain.
         *
         * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
         * contract upgrade].
         */
        function __EIP712_init(string memory name, string memory version) internal onlyInitializing {
            __EIP712_init_unchained(name, version);
        }
    
        function __EIP712_init_unchained(string memory name, string memory version) internal onlyInitializing {
            EIP712Storage storage $ = _getEIP712Storage();
            $._name = name;
            $._version = version;
    
            // Reset prior values in storage if upgrading
            $._hashedName = 0;
            $._hashedVersion = 0;
        }
    
        /**
         * @dev Returns the domain separator for the current chain.
         */
        function _domainSeparatorV4() internal view returns (bytes32) {
            return _buildDomainSeparator();
        }
    
        function _buildDomainSeparator() private view returns (bytes32) {
            return keccak256(abi.encode(TYPE_HASH, _EIP712NameHash(), _EIP712VersionHash(), block.chainid, address(this)));
        }
    
        /**
         * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
         * function returns the hash of the fully encoded EIP712 message for this domain.
         *
         * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
         *
         * ```solidity
         * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
         *     keccak256("Mail(address to,string contents)"),
         *     mailTo,
         *     keccak256(bytes(mailContents))
         * )));
         * address signer = ECDSA.recover(digest, signature);
         * ```
         */
        function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
            return MessageHashUtils.toTypedDataHash(_domainSeparatorV4(), structHash);
        }
    
        /// @inheritdoc IERC5267
        function eip712Domain()
            public
            view
            virtual
            returns (
                bytes1 fields,
                string memory name,
                string memory version,
                uint256 chainId,
                address verifyingContract,
                bytes32 salt,
                uint256[] memory extensions
            )
        {
            EIP712Storage storage $ = _getEIP712Storage();
            // If the hashed name and version in storage are non-zero, the contract hasn't been properly initialized
            // and the EIP712 domain is not reliable, as it will be missing name and version.
            require($._hashedName == 0 && $._hashedVersion == 0, "EIP712: Uninitialized");
    
            return (
                hex"0f", // 01111
                _EIP712Name(),
                _EIP712Version(),
                block.chainid,
                address(this),
                bytes32(0),
                new uint256[](0)
            );
        }
    
        /**
         * @dev The name parameter for the EIP712 domain.
         *
         * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
         * are a concern.
         */
        function _EIP712Name() internal view virtual returns (string memory) {
            EIP712Storage storage $ = _getEIP712Storage();
            return $._name;
        }
    
        /**
         * @dev The version parameter for the EIP712 domain.
         *
         * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
         * are a concern.
         */
        function _EIP712Version() internal view virtual returns (string memory) {
            EIP712Storage storage $ = _getEIP712Storage();
            return $._version;
        }
    
        /**
         * @dev The hash of the name parameter for the EIP712 domain.
         *
         * NOTE: In previous versions this function was virtual. In this version you should override `_EIP712Name` instead.
         */
        function _EIP712NameHash() internal view returns (bytes32) {
            EIP712Storage storage $ = _getEIP712Storage();
            string memory name = _EIP712Name();
            if (bytes(name).length > 0) {
                return keccak256(bytes(name));
            } else {
                // If the name is empty, the contract may have been upgraded without initializing the new storage.
                // We return the name hash in storage if non-zero, otherwise we assume the name is empty by design.
                bytes32 hashedName = $._hashedName;
                if (hashedName != 0) {
                    return hashedName;
                } else {
                    return keccak256("");
                }
            }
        }
    
        /**
         * @dev The hash of the version parameter for the EIP712 domain.
         *
         * NOTE: In previous versions this function was virtual. In this version you should override `_EIP712Version` instead.
         */
        function _EIP712VersionHash() internal view returns (bytes32) {
            EIP712Storage storage $ = _getEIP712Storage();
            string memory version = _EIP712Version();
            if (bytes(version).length > 0) {
                return keccak256(bytes(version));
            } else {
                // If the version is empty, the contract may have been upgraded without initializing the new storage.
                // We return the version hash in storage if non-zero, otherwise we assume the version is empty by design.
                bytes32 hashedVersion = $._hashedVersion;
                if (hashedVersion != 0) {
                    return hashedVersion;
                } else {
                    return keccak256("");
                }
            }
        }
    }
    
  • npm/@openzeppelin/contracts-upgradeable@5.4.0/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 "../../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@5.4.0/access/IAccessControl.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (access/IAccessControl.sol)
    
    pragma solidity >=0.8.4;
    
    /**
     * @dev External interface of AccessControl declared to support ERC-165 detection.
     */
    interface IAccessControl {
        /**
         * @dev The `account` is missing a role.
         */
        error AccessControlUnauthorizedAccount(address account, bytes32 neededRole);
    
        /**
         * @dev The caller of a function is not the expected one.
         *
         * NOTE: Don't confuse with {AccessControlUnauthorizedAccount}.
         */
        error AccessControlBadConfirmation();
    
        /**
         * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
         *
         * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
         * {RoleAdminChanged} not being emitted to signal this.
         */
        event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
    
        /**
         * @dev Emitted when `account` is granted `role`.
         *
         * `sender` is the account that originated the contract call. This account bears the admin role (for the granted role).
         * Expected in cases where the role was granted using the internal {AccessControl-_grantRole}.
         */
        event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
    
        /**
         * @dev Emitted when `account` is revoked `role`.
         *
         * `sender` is the account that originated the contract call:
         *   - if using `revokeRole`, it is the admin role bearer
         *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
         */
        event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
    
        /**
         * @dev Returns `true` if `account` has been granted `role`.
         */
        function hasRole(bytes32 role, address account) external view returns (bool);
    
        /**
         * @dev Returns the admin role that controls `role`. See {grantRole} and
         * {revokeRole}.
         *
         * To change a role's admin, use {AccessControl-_setRoleAdmin}.
         */
        function getRoleAdmin(bytes32 role) external view returns (bytes32);
    
        /**
         * @dev Grants `role` to `account`.
         *
         * If `account` had not been already granted `role`, emits a {RoleGranted}
         * event.
         *
         * Requirements:
         *
         * - the caller must have ``role``'s admin role.
         */
        function grantRole(bytes32 role, address account) external;
    
        /**
         * @dev Revokes `role` from `account`.
         *
         * If `account` had been granted `role`, emits a {RoleRevoked} event.
         *
         * Requirements:
         *
         * - the caller must have ``role``'s admin role.
         */
        function revokeRole(bytes32 role, address account) external;
    
        /**
         * @dev Revokes `role` from the calling account.
         *
         * Roles are often managed via {grantRole} and {revokeRole}: this function's
         * purpose is to provide a mechanism for accounts to lose their privileges
         * if they are compromised (such as when a trusted device is misplaced).
         *
         * If the calling account had been granted `role`, emits a {RoleRevoked}
         * event.
         *
         * Requirements:
         *
         * - the caller must be `callerConfirmation`.
         */
        function renounceRole(bytes32 role, address callerConfirmation) external;
    }
    
  • npm/@openzeppelin/contracts@5.4.0/interfaces/IERC1967.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1967.sol)
    
    pragma solidity >=0.4.11;
    
    /**
     * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
     */
    interface IERC1967 {
        /**
         * @dev Emitted when the implementation is upgraded.
         */
        event Upgraded(address indexed implementation);
    
        /**
         * @dev Emitted when the admin account has changed.
         */
        event AdminChanged(address previousAdmin, address newAdmin);
    
        /**
         * @dev Emitted when the beacon is changed.
         */
        event BeaconUpgraded(address indexed beacon);
    }
    
  • npm/@openzeppelin/contracts@5.4.0/interfaces/IERC5267.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC5267.sol)
    
    pragma solidity >=0.4.16;
    
    interface IERC5267 {
        /**
         * @dev MAY be emitted to signal that the domain could have changed.
         */
        event EIP712DomainChanged();
    
        /**
         * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712
         * signature.
         */
        function eip712Domain()
            external
            view
            returns (
                bytes1 fields,
                string memory name,
                string memory version,
                uint256 chainId,
                address verifyingContract,
                bytes32 salt,
                uint256[] memory extensions
            );
    }
    
  • npm/@openzeppelin/contracts@5.4.0/interfaces/draft-IERC1822.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (interfaces/draft-IERC1822.sol)
    
    pragma solidity >=0.4.16;
    
    /**
     * @dev ERC-1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
     * proxy whose upgrades are fully controlled by the current implementation.
     */
    interface IERC1822Proxiable {
        /**
         * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
         * address.
         *
         * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
         * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
         * function revert if invoked through a proxy.
         */
        function proxiableUUID() external view returns (bytes32);
    }
    
  • npm/@openzeppelin/contracts@5.4.0/utils/Errors.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.1.0) (utils/Errors.sol)
    
    pragma solidity ^0.8.20;
    
    /**
     * @dev Collection of common custom errors used in multiple contracts
     *
     * IMPORTANT: Backwards compatibility is not guaranteed in future versions of the library.
     * It is recommended to avoid relying on the error API for critical functionality.
     *
     * _Available since v5.1._
     */
    library Errors {
        /**
         * @dev The ETH balance of the account is not enough to perform the operation.
         */
        error InsufficientBalance(uint256 balance, uint256 needed);
    
        /**
         * @dev A call to an address target failed. The target may have reverted.
         */
        error FailedCall();
    
        /**
         * @dev The deployment failed.
         */
        error FailedDeployment();
    
        /**
         * @dev A necessary precompile is missing.
         */
        error MissingPrecompile(address);
    }
    
  • npm/@openzeppelin/contracts@5.4.0/interfaces/draft-IERC6093.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (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-20.
         * 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@5.4.0/proxy/ERC1967/ERC1967Utils.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (proxy/ERC1967/ERC1967Utils.sol)
    
    pragma solidity ^0.8.21;
    
    import {IBeacon} from "../beacon/IBeacon.sol";
    import {IERC1967} from "../../interfaces/IERC1967.sol";
    import {Address} from "../../utils/Address.sol";
    import {StorageSlot} from "../../utils/StorageSlot.sol";
    
    /**
     * @dev This library provides getters and event emitting update functions for
     * https://eips.ethereum.org/EIPS/eip-1967[ERC-1967] slots.
     */
    library ERC1967Utils {
        /**
         * @dev Storage slot with the address of the current implementation.
         * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1.
         */
        // solhint-disable-next-line private-vars-leading-underscore
        bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    
        /**
         * @dev The `implementation` of the proxy is invalid.
         */
        error ERC1967InvalidImplementation(address implementation);
    
        /**
         * @dev The `admin` of the proxy is invalid.
         */
        error ERC1967InvalidAdmin(address admin);
    
        /**
         * @dev The `beacon` of the proxy is invalid.
         */
        error ERC1967InvalidBeacon(address beacon);
    
        /**
         * @dev An upgrade function sees `msg.value > 0` that may be lost.
         */
        error ERC1967NonPayable();
    
        /**
         * @dev Returns the current implementation address.
         */
        function getImplementation() internal view returns (address) {
            return StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value;
        }
    
        /**
         * @dev Stores a new address in the ERC-1967 implementation slot.
         */
        function _setImplementation(address newImplementation) private {
            if (newImplementation.code.length == 0) {
                revert ERC1967InvalidImplementation(newImplementation);
            }
            StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value = newImplementation;
        }
    
        /**
         * @dev Performs implementation upgrade with additional setup call if data is nonempty.
         * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
         * to avoid stuck value in the contract.
         *
         * Emits an {IERC1967-Upgraded} event.
         */
        function upgradeToAndCall(address newImplementation, bytes memory data) internal {
            _setImplementation(newImplementation);
            emit IERC1967.Upgraded(newImplementation);
    
            if (data.length > 0) {
                Address.functionDelegateCall(newImplementation, data);
            } else {
                _checkNonPayable();
            }
        }
    
        /**
         * @dev Storage slot with the admin of the contract.
         * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1.
         */
        // solhint-disable-next-line private-vars-leading-underscore
        bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
    
        /**
         * @dev Returns the current admin.
         *
         * TIP: To get this value clients can read directly from the storage slot shown below (specified by ERC-1967) using
         * the https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
         * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
         */
        function getAdmin() internal view returns (address) {
            return StorageSlot.getAddressSlot(ADMIN_SLOT).value;
        }
    
        /**
         * @dev Stores a new address in the ERC-1967 admin slot.
         */
        function _setAdmin(address newAdmin) private {
            if (newAdmin == address(0)) {
                revert ERC1967InvalidAdmin(address(0));
            }
            StorageSlot.getAddressSlot(ADMIN_SLOT).value = newAdmin;
        }
    
        /**
         * @dev Changes the admin of the proxy.
         *
         * Emits an {IERC1967-AdminChanged} event.
         */
        function changeAdmin(address newAdmin) internal {
            emit IERC1967.AdminChanged(getAdmin(), newAdmin);
            _setAdmin(newAdmin);
        }
    
        /**
         * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
         * This is the keccak-256 hash of "eip1967.proxy.beacon" subtracted by 1.
         */
        // solhint-disable-next-line private-vars-leading-underscore
        bytes32 internal constant BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
    
        /**
         * @dev Returns the current beacon.
         */
        function getBeacon() internal view returns (address) {
            return StorageSlot.getAddressSlot(BEACON_SLOT).value;
        }
    
        /**
         * @dev Stores a new beacon in the ERC-1967 beacon slot.
         */
        function _setBeacon(address newBeacon) private {
            if (newBeacon.code.length == 0) {
                revert ERC1967InvalidBeacon(newBeacon);
            }
    
            StorageSlot.getAddressSlot(BEACON_SLOT).value = newBeacon;
    
            address beaconImplementation = IBeacon(newBeacon).implementation();
            if (beaconImplementation.code.length == 0) {
                revert ERC1967InvalidImplementation(beaconImplementation);
            }
        }
    
        /**
         * @dev Change the beacon and trigger a setup call if data is nonempty.
         * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
         * to avoid stuck value in the contract.
         *
         * Emits an {IERC1967-BeaconUpgraded} event.
         *
         * CAUTION: Invoking this function has no effect on an instance of {BeaconProxy} since v5, since
         * it uses an immutable beacon without looking at the value of the ERC-1967 beacon slot for
         * efficiency.
         */
        function upgradeBeaconToAndCall(address newBeacon, bytes memory data) internal {
            _setBeacon(newBeacon);
            emit IERC1967.BeaconUpgraded(newBeacon);
    
            if (data.length > 0) {
                Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
            } else {
                _checkNonPayable();
            }
        }
    
        /**
         * @dev Reverts if `msg.value` is not zero. It can be used to avoid `msg.value` stuck in the contract
         * if an upgrade doesn't perform an initialization call.
         */
        function _checkNonPayable() private {
            if (msg.value > 0) {
                revert ERC1967NonPayable();
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.4.0/proxy/beacon/IBeacon.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (proxy/beacon/IBeacon.sol)
    
    pragma solidity >=0.4.16;
    
    /**
     * @dev This is the interface that {BeaconProxy} expects of its beacon.
     */
    interface IBeacon {
        /**
         * @dev Must return an address that can be used as a delegate call target.
         *
         * {UpgradeableBeacon} will check that this address is a contract.
         */
        function implementation() external view returns (address);
    }
    
  • npm/@openzeppelin/contracts@5.4.0/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@5.4.0/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@5.4.0/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@5.4.0/token/ERC721/utils/ERC721Utils.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (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 provide 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@5.4.0/utils/Address.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (utils/Address.sol)
    
    pragma solidity ^0.8.20;
    
    import {Errors} from "./Errors.sol";
    
    /**
     * @dev Collection of functions related to the address type
     */
    library Address {
        /**
         * @dev There's no code at `target` (it is not a contract).
         */
        error AddressEmptyCode(address target);
    
        /**
         * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
         * `recipient`, forwarding all available gas and reverting on errors.
         *
         * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
         * of certain opcodes, possibly making contracts go over the 2300 gas limit
         * imposed by `transfer`, making them unable to receive funds via
         * `transfer`. {sendValue} removes this limitation.
         *
         * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
         *
         * IMPORTANT: because control is transferred to `recipient`, care must be
         * taken to not create reentrancy vulnerabilities. Consider using
         * {ReentrancyGuard} or the
         * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
         */
        function sendValue(address payable recipient, uint256 amount) internal {
            if (address(this).balance < amount) {
                revert Errors.InsufficientBalance(address(this).balance, amount);
            }
    
            (bool success, bytes memory returndata) = recipient.call{value: amount}("");
            if (!success) {
                _revert(returndata);
            }
        }
    
        /**
         * @dev Performs a Solidity function call using a low level `call`. A
         * plain `call` is an unsafe replacement for a function call: use this
         * function instead.
         *
         * If `target` reverts with a revert reason or custom error, it is bubbled
         * up by this function (like regular Solidity function calls). However, if
         * the call reverted with no returned reason, this function reverts with a
         * {Errors.FailedCall} error.
         *
         * Returns the raw returned data. To convert to the expected return value,
         * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
         *
         * Requirements:
         *
         * - `target` must be a contract.
         * - calling `target` with `data` must not revert.
         */
        function functionCall(address target, bytes memory data) internal returns (bytes memory) {
            return functionCallWithValue(target, data, 0);
        }
    
        /**
         * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
         * but also transferring `value` wei to `target`.
         *
         * Requirements:
         *
         * - the calling contract must have an ETH balance of at least `value`.
         * - the called Solidity function must be `payable`.
         */
        function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
            if (address(this).balance < value) {
                revert Errors.InsufficientBalance(address(this).balance, value);
            }
            (bool success, bytes memory returndata) = target.call{value: value}(data);
            return verifyCallResultFromTarget(target, success, returndata);
        }
    
        /**
         * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
         * but performing a static call.
         */
        function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
            (bool success, bytes memory returndata) = target.staticcall(data);
            return verifyCallResultFromTarget(target, success, returndata);
        }
    
        /**
         * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
         * but performing a delegate call.
         */
        function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
            (bool success, bytes memory returndata) = target.delegatecall(data);
            return verifyCallResultFromTarget(target, success, returndata);
        }
    
        /**
         * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
         * was not a contract or bubbling up the revert reason (falling back to {Errors.FailedCall}) in case
         * of an unsuccessful call.
         */
        function verifyCallResultFromTarget(
            address target,
            bool success,
            bytes memory returndata
        ) internal view returns (bytes memory) {
            if (!success) {
                _revert(returndata);
            } else {
                // only check if target is a contract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                if (returndata.length == 0 && target.code.length == 0) {
                    revert AddressEmptyCode(target);
                }
                return returndata;
            }
        }
    
        /**
         * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
         * revert reason or with a default {Errors.FailedCall} error.
         */
        function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
            if (!success) {
                _revert(returndata);
            } else {
                return returndata;
            }
        }
    
        /**
         * @dev Reverts with returndata if present. Otherwise reverts with {Errors.FailedCall}.
         */
        function _revert(bytes memory returndata) private pure {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                assembly ("memory-safe") {
                    revert(add(returndata, 0x20), mload(returndata))
                }
            } else {
                revert Errors.FailedCall();
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.4.0/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@5.4.0/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@5.4.0/utils/Strings.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.4.0) (utils/Strings.sol)
    
    pragma solidity ^0.8.20;
    
    import {Math} from "./math/Math.sol";
    import {SafeCast} from "./math/SafeCast.sol";
    import {SignedMath} from "./math/SignedMath.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 =
            (1 << 0x08) | // backspace
                (1 << 0x09) | // tab
                (1 << 0x0a) | // newline
                (1 << 0x0c) | // form feed
                (1 << 0x0d) | // carriage return
                (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 Returns true if the two strings are equal.
         */
        function equal(string memory a, string memory b) internal pure returns (bool) {
            return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));
        }
    
        /**
         * @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 all unicode characters, and not just the ones in ranges defined in section 2.5 of
         * RFC-4627 (U+0000 to U+001F, U+0022 and U+005C). 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);
            bytes memory output = new bytes(2 * buffer.length); // worst case scenario
            uint256 outputLength = 0;
    
            for (uint256 i; i < buffer.length; ++i) {
                bytes1 char = bytes1(_unsafeReadBytesOffset(buffer, i));
                if (((SPECIAL_CHARS_LOOKUP & (1 << uint8(char))) != 0)) {
                    output[outputLength++] = "\\";
                    if (char == 0x08) output[outputLength++] = "b";
                    else if (char == 0x09) output[outputLength++] = "t";
                    else if (char == 0x0a) output[outputLength++] = "n";
                    else if (char == 0x0c) output[outputLength++] = "f";
                    else if (char == 0x0d) output[outputLength++] = "r";
                    else if (char == 0x5c) output[outputLength++] = "\\";
                    else if (char == 0x22) {
                        // solhint-disable-next-line quotes
                        output[outputLength++] = '"';
                    }
                } else {
                    output[outputLength++] = char;
                }
            }
            // write the actual length and deallocate unused memory
            assembly ("memory-safe") {
                mstore(output, outputLength)
                mstore(0x40, add(output, shl(5, shr(5, add(outputLength, 63)))))
            }
    
            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))
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.4.0/utils/cryptography/ECDSA.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.1.0) (utils/cryptography/ECDSA.sol)
    
    pragma solidity ^0.8.20;
    
    /**
     * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
     *
     * These functions can be used to verify that a message was signed by the holder
     * of the private keys of a given address.
     */
    library ECDSA {
        enum RecoverError {
            NoError,
            InvalidSignature,
            InvalidSignatureLength,
            InvalidSignatureS
        }
    
        /**
         * @dev The signature derives the `address(0)`.
         */
        error ECDSAInvalidSignature();
    
        /**
         * @dev The signature has an invalid length.
         */
        error ECDSAInvalidSignatureLength(uint256 length);
    
        /**
         * @dev The signature has an S value that is in the upper half order.
         */
        error ECDSAInvalidSignatureS(bytes32 s);
    
        /**
         * @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not
         * return address(0) without also returning an error description. Errors are documented using an enum (error type)
         * and a bytes32 providing additional information about the error.
         *
         * If no error is returned, then the address can be used for verification purposes.
         *
         * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
         * this function rejects them by requiring the `s` value to be in the lower
         * half order, and the `v` value to be either 27 or 28.
         *
         * IMPORTANT: `hash` _must_ be the result of a hash operation for the
         * verification to be secure: it is possible to craft signatures that
         * recover to arbitrary addresses for non-hashed data. A safe way to ensure
         * this is by receiving a hash of the original message (which may otherwise
         * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
         *
         * Documentation for signature generation:
         * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
         * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
         */
        function tryRecover(
            bytes32 hash,
            bytes memory signature
        ) internal pure returns (address recovered, RecoverError err, bytes32 errArg) {
            if (signature.length == 65) {
                bytes32 r;
                bytes32 s;
                uint8 v;
                // ecrecover takes the signature parameters, and the only way to get them
                // currently is to use assembly.
                assembly ("memory-safe") {
                    r := mload(add(signature, 0x20))
                    s := mload(add(signature, 0x40))
                    v := byte(0, mload(add(signature, 0x60)))
                }
                return tryRecover(hash, v, r, s);
            } else {
                return (address(0), RecoverError.InvalidSignatureLength, bytes32(signature.length));
            }
        }
    
        /**
         * @dev Returns the address that signed a hashed message (`hash`) with
         * `signature`. This address can then be used for verification purposes.
         *
         * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
         * this function rejects them by requiring the `s` value to be in the lower
         * half order, and the `v` value to be either 27 or 28.
         *
         * IMPORTANT: `hash` _must_ be the result of a hash operation for the
         * verification to be secure: it is possible to craft signatures that
         * recover to arbitrary addresses for non-hashed data. A safe way to ensure
         * this is by receiving a hash of the original message (which may otherwise
         * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
         */
        function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
            (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature);
            _throwError(error, errorArg);
            return recovered;
        }
    
        /**
         * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
         *
         * See https://eips.ethereum.org/EIPS/eip-2098[ERC-2098 short signatures]
         */
        function tryRecover(
            bytes32 hash,
            bytes32 r,
            bytes32 vs
        ) internal pure returns (address recovered, RecoverError err, bytes32 errArg) {
            unchecked {
                bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
                // We do not check for an overflow here since the shift operation results in 0 or 1.
                uint8 v = uint8((uint256(vs) >> 255) + 27);
                return tryRecover(hash, v, r, s);
            }
        }
    
        /**
         * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
         */
        function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
            (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs);
            _throwError(error, errorArg);
            return recovered;
        }
    
        /**
         * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
         * `r` and `s` signature fields separately.
         */
        function tryRecover(
            bytes32 hash,
            uint8 v,
            bytes32 r,
            bytes32 s
        ) internal pure returns (address recovered, RecoverError err, bytes32 errArg) {
            // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
            // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
            // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
            // signatures from current libraries generate a unique signature with an s-value in the lower half order.
            //
            // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
            // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
            // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
            // these malleable signatures as well.
            if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
                return (address(0), RecoverError.InvalidSignatureS, s);
            }
    
            // If the signature is valid (and not malleable), return the signer address
            address signer = ecrecover(hash, v, r, s);
            if (signer == address(0)) {
                return (address(0), RecoverError.InvalidSignature, bytes32(0));
            }
    
            return (signer, RecoverError.NoError, bytes32(0));
        }
    
        /**
         * @dev Overload of {ECDSA-recover} that receives the `v`,
         * `r` and `s` signature fields separately.
         */
        function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
            (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, v, r, s);
            _throwError(error, errorArg);
            return recovered;
        }
    
        /**
         * @dev Optionally reverts with the corresponding custom error according to the `error` argument provided.
         */
        function _throwError(RecoverError error, bytes32 errorArg) private pure {
            if (error == RecoverError.NoError) {
                return; // no error: do nothing
            } else if (error == RecoverError.InvalidSignature) {
                revert ECDSAInvalidSignature();
            } else if (error == RecoverError.InvalidSignatureLength) {
                revert ECDSAInvalidSignatureLength(uint256(errorArg));
            } else if (error == RecoverError.InvalidSignatureS) {
                revert ECDSAInvalidSignatureS(errorArg);
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.4.0/utils/cryptography/MessageHashUtils.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.3.0) (utils/cryptography/MessageHashUtils.sol)
    
    pragma solidity ^0.8.20;
    
    import {Strings} from "../Strings.sol";
    
    /**
     * @dev Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing.
     *
     * The library provides methods for generating a hash of a message that conforms to the
     * https://eips.ethereum.org/EIPS/eip-191[ERC-191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712]
     * specifications.
     */
    library MessageHashUtils {
        /**
         * @dev Returns the keccak256 digest of an ERC-191 signed data with version
         * `0x45` (`personal_sign` messages).
         *
         * The digest is calculated by prefixing a bytes32 `messageHash` with
         * `"\x19Ethereum Signed Message:\n32"` and hashing the result. It corresponds with the
         * hash signed when using the https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_sign[`eth_sign`] JSON-RPC method.
         *
         * NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with
         * keccak256, although any bytes32 value can be safely used because the final digest will
         * be re-hashed.
         *
         * See {ECDSA-recover}.
         */
        function toEthSignedMessageHash(bytes32 messageHash) internal pure returns (bytes32 digest) {
            assembly ("memory-safe") {
                mstore(0x00, "\x19Ethereum Signed Message:\n32") // 32 is the bytes-length of messageHash
                mstore(0x1c, messageHash) // 0x1c (28) is the length of the prefix
                digest := keccak256(0x00, 0x3c) // 0x3c is the length of the prefix (0x1c) + messageHash (0x20)
            }
        }
    
        /**
         * @dev Returns the keccak256 digest of an ERC-191 signed data with version
         * `0x45` (`personal_sign` messages).
         *
         * The digest is calculated by prefixing an arbitrary `message` with
         * `"\x19Ethereum Signed Message:\n" + len(message)` and hashing the result. It corresponds with the
         * hash signed when using the https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_sign[`eth_sign`] JSON-RPC method.
         *
         * See {ECDSA-recover}.
         */
        function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32) {
            return
                keccak256(bytes.concat("\x19Ethereum Signed Message:\n", bytes(Strings.toString(message.length)), message));
        }
    
        /**
         * @dev Returns the keccak256 digest of an ERC-191 signed data with version
         * `0x00` (data with intended validator).
         *
         * The digest is calculated by prefixing an arbitrary `data` with `"\x19\x00"` and the intended
         * `validator` address. Then hashing the result.
         *
         * See {ECDSA-recover}.
         */
        function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
            return keccak256(abi.encodePacked(hex"19_00", validator, data));
        }
    
        /**
         * @dev Variant of {toDataWithIntendedValidatorHash-address-bytes} optimized for cases where `data` is a bytes32.
         */
        function toDataWithIntendedValidatorHash(
            address validator,
            bytes32 messageHash
        ) internal pure returns (bytes32 digest) {
            assembly ("memory-safe") {
                mstore(0x00, hex"19_00")
                mstore(0x02, shl(96, validator))
                mstore(0x16, messageHash)
                digest := keccak256(0x00, 0x36)
            }
        }
    
        /**
         * @dev Returns the keccak256 digest of an EIP-712 typed data (ERC-191 version `0x01`).
         *
         * The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with
         * `\x19\x01` and hashing the result. It corresponds to the hash signed by the
         * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712.
         *
         * See {ECDSA-recover}.
         */
        function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 digest) {
            assembly ("memory-safe") {
                let ptr := mload(0x40)
                mstore(ptr, hex"19_01")
                mstore(add(ptr, 0x02), domainSeparator)
                mstore(add(ptr, 0x22), structHash)
                digest := keccak256(ptr, 0x42)
            }
        }
    }
    
  • npm/@openzeppelin/contracts@5.4.0/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@5.4.0/utils/math/Math.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.3.0) (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 `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, 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) {
            // (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 byteArray) private pure returns (bool) {
            for (uint256 i = 0; i < byteArray.length; ++i) {
                if (byteArray[i] != 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 last 16 bytes.
            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;
        }
    }
    
  • npm/@openzeppelin/contracts@5.4.0/utils/math/SafeCast.sol
    // SPDX-License-Identifier: MIT
    // OpenZeppelin Contracts (last updated v5.1.0) (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 an uint of `bits` size.
         */
        error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value);
    
        /**
         * @dev An int value doesn't fit in an 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 An 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@5.4.0/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);
            }
        }
    }
    
ABI · 79 entries
json
[
  {
    "type": "constructor",
    "inputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "AccessControlBadConfirmation",
    "type": "error",
    "inputs": []
  },
  {
    "name": "AccessControlUnauthorizedAccount",
    "type": "error",
    "inputs": [
      {
        "name": "account",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "neededRole",
        "type": "bytes32",
        "internalType": "bytes32"
      }
    ]
  },
  {
    "name": "AddressEmptyCode",
    "type": "error",
    "inputs": [
      {
        "name": "target",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "AlreadyMember",
    "type": "error",
    "inputs": []
  },
  {
    "name": "CommunityAlreadyExists",
    "type": "error",
    "inputs": []
  },
  {
    "name": "CommunityNotFound",
    "type": "error",
    "inputs": []
  },
  {
    "name": "ERC1967InvalidImplementation",
    "type": "error",
    "inputs": [
      {
        "name": "implementation",
        "type": "address",
        "internalType": "address"
      }
    ]
  },
  {
    "name": "ERC1967NonPayable",
    "type": "error",
    "inputs": []
  },
  {
    "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": "ExpiredSignature",
    "type": "error",
    "inputs": []
  },
  {
    "name": "FailedCall",
    "type": "error",
    "inputs": []
  },
  {
    "name": "InvalidBackendSigner",
    "type": "error",
    "inputs": []
  },
  {
    "name": "InvalidCommunityId",
    "type": "error",
    "inputs": []
  },
  {
    "name": "InvalidInitialization",
    "type": "error",
    "inputs": []
  },
  {
    "name": "InvalidSignature",
    "type": "error",
    "inputs": []
  },
  {
    "name": "NoIdentityFound",
    "type": "error",
    "inputs": []
  },
  {
    "name": "NotInitializing",
    "type": "error",
    "inputs": []
  },
  {
    "name": "TokenNotTransferable",
    "type": "error",
    "inputs": []
  },
  {
    "name": "UUPSUnauthorizedCallContext",
    "type": "error",
    "inputs": []
  },
  {
    "name": "UUPSUnsupportedProxiableUUID",
    "type": "error",
    "inputs": [
      {
        "name": "slot",
        "type": "bytes32",
        "internalType": "bytes32"
      }
    ]
  },
  {
    "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": "BackendSignerUpdated",
    "type": "event",
    "inputs": [
      {
        "name": "oldSigner",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "newSigner",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      }
    ],
    "anonymous": false
  },
  {
    "name": "BaseURIUpdated",
    "type": "event",
    "inputs": [
      {
        "name": "newBaseURI",
        "type": "string",
        "indexed": false,
        "internalType": "string"
      }
    ],
    "anonymous": false
  },
  {
    "name": "CommunityCreated",
    "type": "event",
    "inputs": [
      {
        "name": "communityId",
        "type": "uint256",
        "indexed": true,
        "internalType": "uint256"
      },
      {
        "name": "name",
        "type": "string",
        "indexed": false,
        "internalType": "string"
      },
      {
        "name": "creator",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "timestamp",
        "type": "uint256",
        "indexed": false,
        "internalType": "uint256"
      }
    ],
    "anonymous": false
  },
  {
    "name": "CommunityJoined",
    "type": "event",
    "inputs": [
      {
        "name": "communityId",
        "type": "uint256",
        "indexed": true,
        "internalType": "uint256"
      },
      {
        "name": "user",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "timestamp",
        "type": "uint256",
        "indexed": false,
        "internalType": "uint256"
      }
    ],
    "anonymous": false
  },
  {
    "name": "EIP712DomainChanged",
    "type": "event",
    "inputs": [],
    "anonymous": false
  },
  {
    "name": "Initialized",
    "type": "event",
    "inputs": [
      {
        "name": "version",
        "type": "uint64",
        "indexed": false,
        "internalType": "uint64"
      }
    ],
    "anonymous": false
  },
  {
    "name": "RoleAdminChanged",
    "type": "event",
    "inputs": [
      {
        "name": "role",
        "type": "bytes32",
        "indexed": true,
        "internalType": "bytes32"
      },
      {
        "name": "previousAdminRole",
        "type": "bytes32",
        "indexed": true,
        "internalType": "bytes32"
      },
      {
        "name": "newAdminRole",
        "type": "bytes32",
        "indexed": true,
        "internalType": "bytes32"
      }
    ],
    "anonymous": false
  },
  {
    "name": "RoleGranted",
    "type": "event",
    "inputs": [
      {
        "name": "role",
        "type": "bytes32",
        "indexed": true,
        "internalType": "bytes32"
      },
      {
        "name": "account",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "sender",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      }
    ],
    "anonymous": false
  },
  {
    "name": "RoleRevoked",
    "type": "event",
    "inputs": [
      {
        "name": "role",
        "type": "bytes32",
        "indexed": true,
        "internalType": "bytes32"
      },
      {
        "name": "account",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      },
      {
        "name": "sender",
        "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": "Upgraded",
    "type": "event",
    "inputs": [
      {
        "name": "implementation",
        "type": "address",
        "indexed": true,
        "internalType": "address"
      }
    ],
    "anonymous": false
  },
  {
    "name": "ADMIN_ROLE",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "bytes32",
        "internalType": "bytes32"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "BACKEND_SIGNER_ROLE",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "bytes32",
        "internalType": "bytes32"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "DEFAULT_ADMIN_ROLE",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "bytes32",
        "internalType": "bytes32"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "UPGRADE_INTERFACE_VERSION",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "string",
        "internalType": "string"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "approve",
    "type": "function",
    "inputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [],
    "stateMutability": "pure"
  },
  {
    "name": "backendSigner",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "balanceOf",
    "type": "function",
    "inputs": [
      {
        "name": "owner",
        "type": "address",
        "internalType": "address"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "baseURI",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "string",
        "internalType": "string"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "claimCommunity",
    "type": "function",
    "inputs": [
      {
        "name": "creator",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "communityId",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "name",
        "type": "string",
        "internalType": "string"
      },
      {
        "name": "timestamp",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "signature",
        "type": "bytes",
        "internalType": "bytes"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "stateMutability": "nonpayable"
  },
  {
    "name": "communities",
    "type": "function",
    "inputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [
      {
        "name": "name",
        "type": "string",
        "internalType": "string"
      },
      {
        "name": "creator",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "createdAt",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "exists",
        "type": "bool",
        "internalType": "bool"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "didContract",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "contract IDecentralizedIdentity"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "eip712Domain",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "fields",
        "type": "bytes1",
        "internalType": "bytes1"
      },
      {
        "name": "name",
        "type": "string",
        "internalType": "string"
      },
      {
        "name": "version",
        "type": "string",
        "internalType": "string"
      },
      {
        "name": "chainId",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "verifyingContract",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "salt",
        "type": "bytes32",
        "internalType": "bytes32"
      },
      {
        "name": "extensions",
        "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": "getCommunity",
    "type": "function",
    "inputs": [
      {
        "name": "communityId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [
      {
        "name": "name",
        "type": "string",
        "internalType": "string"
      },
      {
        "name": "creator",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "createdAt",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "exists",
        "type": "bool",
        "internalType": "bool"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "getRoleAdmin",
    "type": "function",
    "inputs": [
      {
        "name": "role",
        "type": "bytes32",
        "internalType": "bytes32"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "bytes32",
        "internalType": "bytes32"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "grantRole",
    "type": "function",
    "inputs": [
      {
        "name": "role",
        "type": "bytes32",
        "internalType": "bytes32"
      },
      {
        "name": "account",
        "type": "address",
        "internalType": "address"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "hasRole",
    "type": "function",
    "inputs": [
      {
        "name": "role",
        "type": "bytes32",
        "internalType": "bytes32"
      },
      {
        "name": "account",
        "type": "address",
        "internalType": "address"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "bool",
        "internalType": "bool"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "initialize",
    "type": "function",
    "inputs": [
      {
        "name": "_didContract",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "_backendSigner",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "initialBaseURI",
        "type": "string",
        "internalType": "string"
      }
    ],
    "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": "isMember",
    "type": "function",
    "inputs": [
      {
        "name": "user",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "communityId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "bool",
        "internalType": "bool"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "joinCommunity",
    "type": "function",
    "inputs": [
      {
        "name": "user",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "communityId",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "timestamp",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "signature",
        "type": "bytes",
        "internalType": "bytes"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "memberships",
    "type": "function",
    "inputs": [
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "bool",
        "internalType": "bool"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "name",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "string",
        "internalType": "string"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "ownerOf",
    "type": "function",
    "inputs": [
      {
        "name": "tokenId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "proxiableUUID",
    "type": "function",
    "inputs": [],
    "outputs": [
      {
        "name": "",
        "type": "bytes32",
        "internalType": "bytes32"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "renounceRole",
    "type": "function",
    "inputs": [
      {
        "name": "role",
        "type": "bytes32",
        "internalType": "bytes32"
      },
      {
        "name": "callerConfirmation",
        "type": "address",
        "internalType": "address"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "revokeRole",
    "type": "function",
    "inputs": [
      {
        "name": "role",
        "type": "bytes32",
        "internalType": "bytes32"
      },
      {
        "name": "account",
        "type": "address",
        "internalType": "address"
      }
    ],
    "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"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "safeTransferFrom",
    "type": "function",
    "inputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      },
      {
        "name": "",
        "type": "bytes",
        "internalType": "bytes"
      }
    ],
    "outputs": [],
    "stateMutability": "pure"
  },
  {
    "name": "setApprovalForAll",
    "type": "function",
    "inputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "",
        "type": "bool",
        "internalType": "bool"
      }
    ],
    "outputs": [],
    "stateMutability": "pure"
  },
  {
    "name": "setBackendSigner",
    "type": "function",
    "inputs": [
      {
        "name": "newSigner",
        "type": "address",
        "internalType": "address"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "setBaseURI",
    "type": "function",
    "inputs": [
      {
        "name": "newBaseURI",
        "type": "string",
        "internalType": "string"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "setDIDContract",
    "type": "function",
    "inputs": [
      {
        "name": "newDIDContract",
        "type": "address",
        "internalType": "address"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  },
  {
    "name": "supportsInterface",
    "type": "function",
    "inputs": [
      {
        "name": "interfaceId",
        "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": "communityId",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "string",
        "internalType": "string"
      }
    ],
    "stateMutability": "view"
  },
  {
    "name": "transferFrom",
    "type": "function",
    "inputs": [
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "",
        "type": "uint256",
        "internalType": "uint256"
      }
    ],
    "outputs": [],
    "stateMutability": "pure"
  },
  {
    "name": "upgradeToAndCall",
    "type": "function",
    "inputs": [
      {
        "name": "newImplementation",
        "type": "address",
        "internalType": "address"
      },
      {
        "name": "data",
        "type": "bytes",
        "internalType": "bytes"
      }
    ],
    "outputs": [],
    "stateMutability": "payable"
  }
]