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Contract Source Code Verified (Exact Match)

Contract Name:
ZNSRegistry

Compiler Version
v0.8.18+commit.87f61d96

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 13 : ZNSRegistry.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.18;

import { IZNSRegistry } from "./IZNSRegistry.sol";
import { AAccessControlled } from "../access/AAccessControlled.sol";
import { UUPSUpgradeable } from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";


/**
 * @title The main reference data contract in ZNS. Also, often, the last contract
 * in the call chain of many operations where the most crucial Name owner data settles.
 * Owner of a domain in this contract also serves as the owner of the stake in `ZNSTreasury`.
 */
contract ZNSRegistry is AAccessControlled, UUPSUpgradeable, IZNSRegistry {

    // Mapping of all approved resolvers
    mapping(string resolverType => address resolver) internal resolvers;

    /**
     * @notice Mapping of `domainHash` to [DomainRecord](./IZNSRegistry.md#iznsregistry) struct to hold information
     * about each domain
     */
    mapping(bytes32 domainHash => DomainRecord domainRecord) internal records;

    /**
     * @notice Mapping of `owner` => `operator` => `bool` to show accounts that
     * are or aren't allowed access to domains that `owner` has access to.
     * Note that operators can NOT change the owner of the domain, but can change
     * the resolver or resolver records.
     */
    mapping(address owner => mapping(address operator => bool isOperator))
        internal operators;

    /**
     * @notice Revert if `msg.sender` is not the owner or an operator allowed by the owner
     * @param domainHash the hash of a domain's name
     */
    modifier onlyOwnerOrOperator(bytes32 domainHash) {
        require(
            isOwnerOrOperator(domainHash, msg.sender),
            "ZNSRegistry: Not authorized"
        );
        _;
    }

    /**
     * @notice Revert if `msg.sender` is not the owner. Used for owner restricted functions.
     * @param domainHash the hash of a domain's name
     */
    modifier onlyOwner(bytes32 domainHash) {
        require(
            records[domainHash].owner == msg.sender,
            "ZNSRegistry: Not the Name Owner"
        );
        _;
    }

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

    /**
     * @notice Initializer for the `ZNSRegistry` proxy.
     * @param accessController_ The address of the `ZNSAccessController` contract
     * @dev ! The owner of the 0x0 hash should be a multisig ideally, but EOA can be used to deploy !
     * > Admin account deploying the contract will be the owner of the 0x0 hash !
     */
    function initialize(address accessController_) external override initializer {
        records[0x0].owner = msg.sender;
        _setAccessController(accessController_);
    }

    /**
     * @notice Checks if a given domain exists
     * @param domainHash The hash of a domain's name
     */
    function exists(bytes32 domainHash) external view override returns (bool) {
        return _exists(domainHash);
    }

    /**
     * @notice Checks if provided address is an owner or an operator of the provided domain
     * @param domainHash The hash of a domain's name
     * @param candidate The address for which we are checking access
     */
    function isOwnerOrOperator(
        bytes32 domainHash,
        address candidate
    ) public view override returns (bool) {
        address owner = records[domainHash].owner;
        return candidate == owner || operators[owner][candidate];
    }

    /**
     * @notice External function that checks if provided address is an operator for the provided owner.
     * @param operator The address for which we are checking access
     * @param owner The owner of the domain(-s) in question
    */
    function isOperatorFor(
        address operator,
        address owner
    ) external view override returns (bool) {
        return operators[owner][operator];
    }

    /**
     * @notice Set an `operator` as `allowed` to give or remove permissions for ALL
     * domains owned by the owner `msg.sender`.
     * Emits an `OperatorPermissionSet` event.
     * @param operator The account to allow/disallow
     * @param allowed The true/false value to set
     */
    function setOwnersOperator(address operator, bool allowed) external override {
        operators[msg.sender][operator] = allowed;

        emit OperatorPermissionSet(msg.sender, operator, allowed);
    }

    /**
     * @notice Gets a record for a domain (owner, resolver) from the internal mapping
     * `records`. `records` maps a domain hash to a
     * [DomainRecord](./IZNSRegistry.md#iznsregistry) struct.
     * @param domainHash the hash of a domain's name
     */
    function getDomainRecord(
        bytes32 domainHash
    ) external view override returns (DomainRecord memory) {
        return records[domainHash];
    }

    /**
     * @notice Gets the owner of the given domain
     * @param domainHash the hash of a domain's name
     */
    function getDomainOwner(
        bytes32 domainHash
    ) external view override returns (address) {
        return records[domainHash].owner;
    }

    /**
     * @notice Gets the resolver set for the given domain.
     * @param domainHash the hash of a domain's name
     */
    function getDomainResolver(
        bytes32 domainHash
    ) external view override returns (address) {
        return records[domainHash].resolver;
    }

    /**
     * @notice Creates a new domain record. Only callable by the `ZNSRootRegistrar.sol`
     * or an address that has REGISTRAR_ROLE. This is one of the last calls in the Register
     * flow that starts from `ZNSRootRegistrar.registerRootDomain()`. Calls 2 internal functions to set
     * the owner and resolver of the domain separately.
     * Can be called with `resolver` param as 0, which will exclude the call to set resolver.
     * Emits `DomainOwnerSet` and possibly `DomainResolverSet` events.
     * @param domainHash The hash of the domain name
     * @param owner The owner of the new domain
     * @param resolverType The string identifier of the resolver for the new domain, e.g. "address"
     */
    function createDomainRecord(
        bytes32 domainHash,
        address owner,
        string calldata resolverType
    ) external override onlyRegistrar {
        _setDomainOwner(domainHash, owner);

        // We allow creation of partial domain data with no resolver address
        if (bytes(resolverType).length != 0) {
            _setDomainResolver(domainHash, resolverType);
        }
    }

    /**
     * @notice Given a resolver type, returns the address of the resolver contract for that type or 0x0 if not found
     * @param resolverType The resolver type as a string, e.g. "address"
     */
    function getResolverType(string calldata resolverType) public view override returns(address) {
        return resolvers[resolverType];
    }

    /**
     * @notice Add a new resolver type option to the mapping of types
     * This function can also be used to update the resolver mapping for an existing resolver 
     * simple by using an existing key like "address" with a new address
     * @param resolverType The type of the resolver to add
     * @param resolver The address of the new resolver contract
     */
    function addResolverType(string calldata resolverType, address resolver) public override onlyAdmin {
        resolvers[resolverType] = resolver;
        emit ResolverAdded(resolverType, resolver);
    }

    /**
     * @notice Delete a resolver type from the mapping of types
     * @param resolverType The type to be removed
     */
    function deleteResolverType(string calldata resolverType) public override onlyAdmin {
        delete resolvers[resolverType];
        emit ResolverDeleted(resolverType);
    }

    /**
     * @notice Updates an existing domain record's owner and resolver.
     * Note that this function can ONLY be called by the Name owner of the domain.
     * This is NOT used by the `ZNSRootRegistrar.sol` contract and serves as a user facing function
     * for the owners of existing domains to change their data on this contract. A domain
     * `operator` can NOT call this, since he is not allowed to change the owner.
     * Emits `DomainOwnerSet` and `DomainResolverSet` events.
     * @param domainHash The hash of the domain
     * @param owner The owner or an allowed operator of that domain
     * @param resolverType The resolver for the domain
     */
    function updateDomainRecord(
        bytes32 domainHash,
        address owner,
        string calldata resolverType
    ) external override onlyOwner(domainHash) {
        // `exists` is checked implicitly through the modifier
        _setDomainOwner(domainHash, owner);
        _setDomainResolver(domainHash, resolverType);
    }

    /**
     * @notice Updates the owner of an existing domain. Can be called by either the Name owner
     * on this contract OR the `ZNSRootRegistrar.sol` contract as part of the Reclaim flow
     * that starts at `ZNSRootRegistrar.sol.reclaim()`. Emits an `DomainOwnerSet` event.
     * @param domainHash the hash of a domain's name
     * @param owner The account to transfer ownership to
     */
    function updateDomainOwner(
        bytes32 domainHash,
        address owner
    ) external override {
        require(
            msg.sender == records[domainHash].owner ||
            accessController.isRegistrar(msg.sender),
            "ZNSRegistry: Only Name Owner or Registrar allowed to call"
        );

        _setDomainOwner(domainHash, owner);
    }

    /**
     * @notice Updates the resolver of an existing domain in `records`.
     * Can be called by either the owner of the Name or an allowed operator.
     * @param domainHash the hash of a domain's name
     * @param resolverType The new Resolver contract address
     */
    function updateDomainResolver(
        bytes32 domainHash,
        string calldata resolverType
    ) external override onlyOwnerOrOperator(domainHash) {
        // `exists` is checked implicitly through the modifier
        _setDomainResolver(domainHash, resolverType);
    }

    /**
     * @notice Deletes a domain's record from this contract's state.
     * This can ONLY be called by the `ZNSRootRegistrar.sol` contract as part of the Revoke flow
     * or any address holding the `REGISTRAR_ROLE`. Emits a `DomainRecordDeleted` event.
     * @param domainHash The hash of the domain name
     */
    function deleteRecord(bytes32 domainHash) external override onlyRegistrar {
        delete records[domainHash];

        emit DomainRecordDeleted(domainHash);
    }

    /**
     * @notice Check if a domain exists. True if the owner is not `0x0`
     * @param domainHash the hash of a domain's name
     */
    function _exists(bytes32 domainHash) internal view returns (bool) {
        return records[domainHash].owner != address(0);
    }

    /**
     * @notice Internal function to set a domain's owner in state `records`.
     * Owner can NOT be set to 0, since we use delete operation as part of the
     * ``deleteRecord()`` function.
     * Emits a `DomainOwnerSet` event.
     * @param domainHash the hash of a domain's name
     * @param owner The owner to set
     */
    function _setDomainOwner(bytes32 domainHash, address owner) internal {
        require(owner != address(0), "ZNSRegistry: Owner cannot be zero address");
        records[domainHash].owner = owner;
        emit DomainOwnerSet(domainHash, owner);
    }

    /**
     * @notice Internal function to set a domain's resolver in state `records`.
     * Resolver can be set to 0, since we allow partial domain data. Emits a `DomainResolverSet` event.
     * @param domainHash the hash of a domain's name
     * @param resolverType The resolver to set
     */
    function _setDomainResolver(
        bytes32 domainHash,
        string calldata resolverType
    ) internal {
        address resolver = resolvers[resolverType];

        records[domainHash].resolver = resolver;
        emit DomainResolverSet(domainHash, resolver);
    }

    /**
     * @notice To use UUPS proxy we override this function and revert if `msg.sender` isn't authorized
     * @param newImplementation The implementation contract to upgrade to
     */
    // solhint-disable-next-line
    function _authorizeUpgrade(address newImplementation) internal view override {
        accessController.checkGovernor(msg.sender);
    }
}

File 2 of 13 : draft-IERC1822Upgradeable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822ProxiableUpgradeable {
    /**
     * @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);
}

File 3 of 13 : IERC1967Upgradeable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC1967.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 *
 * _Available since v4.8.3._
 */
interface IERC1967Upgradeable {
    /**
     * @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);
}

File 4 of 13 : IBeaconUpgradeable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeaconUpgradeable {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

File 5 of 13 : ERC1967UpgradeUpgradeable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../interfaces/IERC1967Upgradeable.sol";
import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 */
abstract contract ERC1967UpgradeUpgradeable is Initializable, IERC1967Upgradeable {
    function __ERC1967Upgrade_init() internal onlyInitializing {
    }

    function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
    }
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            AddressUpgradeable.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data, bool forceCall) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            AddressUpgradeable.functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
        }
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

File 6 of 13 : Initializable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @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 Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 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 functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _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 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _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() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @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 {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

File 7 of 13 : UUPSUpgradeable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./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.
 *
 * _Available since v4.1._
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
    address private immutable __self = address(this);

    /**
     * @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 ERC1967) 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 ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        require(address(this) != __self, "Function must be called through delegatecall");
        require(_getImplementation() == __self, "Function must be called through active proxy");
        _;
    }

    /**
     * @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() {
        require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
        _;
    }

    /**
     * @dev Implementation of the ERC1822 {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 override notDelegated returns (bytes32) {
        return _IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeTo(address newImplementation) public virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
    }

    /**
     * @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, true);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeTo} and {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal override onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

File 8 of 13 : AddressUpgradeable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

File 9 of 13 : StorageSlotUpgradeable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.0;

/**
 * @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 ERC1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
 * _Available since v4.9 for `string`, `bytes`._
 */
library StorageSlotUpgradeable {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 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) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            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) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            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) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}

File 10 of 13 : IAccessControl.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @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 signaling this.
     *
     * _Available since v3.1._
     */
    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, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    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 `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

File 11 of 13 : AAccessControlled.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.18;

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


/**
 * @title This abstract contract outlines basic functionality, declares functions
 * that need to be implemented to provide a deterministic connection to `ZNSAccessController` module.
 * @dev In order to connect an arbitrary module to `ZNSAccessController` and it's functionality,
 * this contract needs to be inherited by the module.
 */
abstract contract AAccessControlled {

    /**
     * @notice Emitted when the access controller contract address is set.
     */
    event AccessControllerSet(address accessController);

    /**
     * @notice Address of the ZNSAccessController contract.
     */
    IZNSAccessController internal accessController;

    /**
     * @notice Modifier to make a function callable only when caller is an admin.
     * Implemented here to avoid declaring this in every single contract that uses it.
     */
    modifier onlyAdmin() {
        accessController.checkAdmin(msg.sender);
        _;
    }

    /**
     * @notice Revert if `msg.sender` is not the `ZNSRootRegistrar.sol` contract
     * or an address holding REGISTRAR_ROLE.
     */
    modifier onlyRegistrar {
        accessController.checkRegistrar(msg.sender);
        _;
    }

    /**
     * @notice Universal getter for `accessController` address on any contract that
     * inherits from `AAccessControlled`.
     */
    function getAccessController() external view returns (address) {
        return address(accessController);
    }

    /**
     * @notice Universal setter for `accessController` address on any contract that
     * inherits from `AAccessControlled`.
     * Only ADMIN can call this function.
     * Fires `AccessControllerSet` event.
     * @param accessController_ The address of the new access controller
     */
    function setAccessController(address accessController_)
    external
    onlyAdmin {
        _setAccessController(accessController_);
    }

    /**
     * @notice Internal function to set the access controller address.
     * @param _accessController Address of the ZNSAccessController contract.
     */
    function _setAccessController(address _accessController) internal {
        require(_accessController != address(0), "AC: _accessController is 0x0 address");
        accessController = IZNSAccessController(_accessController);
        emit AccessControllerSet(_accessController);
    }
}

File 12 of 13 : IZNSAccessController.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.18;

import { IAccessControl } from "@openzeppelin/contracts/access/IAccessControl.sol";


interface IZNSAccessController is IAccessControl {
    function setRoleAdmin(bytes32 role, bytes32 adminRole) external;

    function checkGovernor(address account) external view;

    function checkAdmin(address account) external view;

    function checkExecutor(address account) external view;

    function checkRegistrar(address account) external view;

    function isAdmin(address account) external view returns (bool);

    function isRegistrar(address account) external view returns (bool);

    function isGovernor(address account) external view returns (bool);

    function isExecutor(address account) external view returns (bool);
}

File 13 of 13 : IZNSRegistry.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.18;


/**
 * @notice The `DomainRecord` struct is meant to hold relevant information
 * about a domain, such as its owner and resolver.
 * - `owner` (address): The owner of the domain (also called the owner of the Name).
 * - `resolver` (address): The address of the Resolver contract where this domain's source records are stored.
 *
 * In the future, there will be multiple Resolver contracts that support different types of sources.
 * Currently, only the `ZNSAddressResolver` is implemented.
 */
interface IZNSRegistry {

    /**
     * @notice Description of a domain record, pointing to the 
     * owner address of that record as well as the address of
     * its resolver
     */
    struct DomainRecord {
        address owner;
        address resolver;
    }

    /**
     * @notice Emits when ownership of a domain is modified in ``records``
     * @param domainHash the hash of a domain's name
     * @param owner The new domain owner
     */
    event DomainOwnerSet(
        bytes32 indexed domainHash,
        address indexed owner
    );

    /**
     * @notice Emit when a domain's resolver is modified in ``records``
     * @param domainHash the hash of a domain's name
     * @param resolver The new resolver address
     */
    event DomainResolverSet(
        bytes32 indexed domainHash,
        address indexed resolver
    );

    /**
     * @notice Emits when a domain record is deleted
     * @param domainHash The hash of a domain's name
     */
    event DomainRecordDeleted(
        bytes32 indexed domainHash
    );

    /**
     * @notice Emit when an owner allows/disallows permissions for an operator
     * @param owner Owner of the domain in question
     * @param operator Address that was allowed/disallowed
     * @param allowed Boolean status of their permission
     */
    event OperatorPermissionSet(
        address indexed owner,
        address indexed operator,
        bool allowed
    );

    /**
     * @notice Emitted when a new resolver type is added to ZNS
     * @param resolverType The name of the resolver type
     * @param resolver The address of the resolver contract
     */
    event ResolverAdded(
        string resolverType,
        address resolver
    );

    /**
     * @notice Emitted when a resolver is deleted from ZNS
     * @param resolverType The name of the resolver type
     */
    event ResolverDeleted(
        string resolverType
    );

    function initialize(address accessController) external;

    function exists(bytes32 domainHash) external view returns (bool);

    function isOwnerOrOperator(
        bytes32 domainHash,
        address candidate
    ) external view returns (bool);

    function isOperatorFor(
        address operator,
        address owner
    ) external view returns (bool);

    /**
     * @notice Set an `operator` as `allowed` to give or remove permissions for all
     * domains owned by `msg.sender`
     * @param operator The account to allow/disallow
     * @param allowed The true/false value to set
     */
    function setOwnersOperator(address operator, bool allowed) external;

    function getDomainRecord(
        bytes32 domainHash
    ) external view returns (DomainRecord memory);

    function getDomainOwner(
        bytes32 domainHash
    ) external view returns (address);

    function getDomainResolver(
        bytes32 domainHash
    ) external view returns (address);

    function createDomainRecord(
        bytes32 domainHash,
        address owner,
        string calldata resolverType
    ) external;

    function getResolverType(
        string calldata resolverType
    ) external returns (address); 

    function addResolverType(
        string calldata resolverType,
        address resolver
    ) external;

    function deleteResolverType(
        string calldata resolverType
    ) external;

    function updateDomainRecord(
        bytes32 domainHash,
        address owner,
        string calldata resolverType
    ) external;

    function updateDomainOwner(bytes32 domainHash, address owner) external;

    function updateDomainResolver(
        bytes32 domainHash,
        string calldata resolverType
    ) external;

    function deleteRecord(bytes32 domainHash) external;
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"accessController","type":"address"}],"name":"AccessControllerSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"beacon","type":"address"}],"name":"BeaconUpgraded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"domainHash","type":"bytes32"},{"indexed":true,"internalType":"address","name":"owner","type":"address"}],"name":"DomainOwnerSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"domainHash","type":"bytes32"}],"name":"DomainRecordDeleted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"domainHash","type":"bytes32"},{"indexed":true,"internalType":"address","name":"resolver","type":"address"}],"name":"DomainResolverSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"allowed","type":"bool"}],"name":"OperatorPermissionSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"resolverType","type":"string"},{"indexed":false,"internalType":"address","name":"resolver","type":"address"}],"name":"ResolverAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"resolverType","type":"string"}],"name":"ResolverDeleted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"inputs":[{"internalType":"string","name":"resolverType","type":"string"},{"internalType":"address","name":"resolver","type":"address"}],"name":"addResolverType","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"domainHash","type":"bytes32"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"string","name":"resolverType","type":"string"}],"name":"createDomainRecord","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"domainHash","type":"bytes32"}],"name":"deleteRecord","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"resolverType","type":"string"}],"name":"deleteResolverType","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"domainHash","type":"bytes32"}],"name":"exists","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAccessController","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"domainHash","type":"bytes32"}],"name":"getDomainOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"domainHash","type":"bytes32"}],"name":"getDomainRecord","outputs":[{"components":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"resolver","type":"address"}],"internalType":"struct IZNSRegistry.DomainRecord","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"domainHash","type":"bytes32"}],"name":"getDomainResolver","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"resolverType","type":"string"}],"name":"getResolverType","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"accessController_","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"address","name":"owner","type":"address"}],"name":"isOperatorFor","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"domainHash","type":"bytes32"},{"internalType":"address","name":"candidate","type":"address"}],"name":"isOwnerOrOperator","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proxiableUUID","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"accessController_","type":"address"}],"name":"setAccessController","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"allowed","type":"bool"}],"name":"setOwnersOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"domainHash","type":"bytes32"},{"internalType":"address","name":"owner","type":"address"}],"name":"updateDomainOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"domainHash","type":"bytes32"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"string","name":"resolverType","type":"string"}],"name":"updateDomainRecord","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"domainHash","type":"bytes32"},{"internalType":"string","name":"resolverType","type":"string"}],"name":"updateDomainResolver","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"payable","type":"function"}]

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.