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Contract

0x00000000Fc1237824fb747aBDE0FF18990E59b7e
 
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Remove For1191903472024-04-24 17:24:3155 mins ago1713979471IN
Farcaster: Key Registry
0 ETH0.000010130.06106025
Remove For1191895682024-04-24 16:58:331 hr ago1713977913IN
Farcaster: Key Registry
0 ETH0.000008180.06209609
Remove For1191888292024-04-24 16:33:551 hr ago1713976435IN
Farcaster: Key Registry
0 ETH0.000011160.06195007
Remove For1191886142024-04-24 16:26:451 hr ago1713976005IN
Farcaster: Key Registry
0 ETH0.00001020.06149922
Remove For1191869032024-04-24 15:29:432 hrs ago1713972583IN
Farcaster: Key Registry
0 ETH0.00001010.06086255
Remove For1191867262024-04-24 15:23:492 hrs ago1713972229IN
Farcaster: Key Registry
0 ETH0.000011050.06130688
Remove For1191861992024-04-24 15:06:153 hrs ago1713971175IN
Farcaster: Key Registry
0 ETH0.000009010.0617336
Remove For1191861732024-04-24 15:05:233 hrs ago1713971123IN
Farcaster: Key Registry
0 ETH0.000011180.06203298
Remove For1191854542024-04-24 14:41:253 hrs ago1713969685IN
Farcaster: Key Registry
0 ETH0.000008170.06201168
Remove For1191854352024-04-24 14:40:473 hrs ago1713969647IN
Farcaster: Key Registry
0 ETH0.00000930.06370079
Remove For1191845212024-04-24 14:10:194 hrs ago1713967819IN
Farcaster: Key Registry
0 ETH0.000009050.06199766
Remove For1191845052024-04-24 14:09:474 hrs ago1713967787IN
Farcaster: Key Registry
0 ETH0.000010290.06203533
Remove For1191842762024-04-24 14:02:094 hrs ago1713967329IN
Farcaster: Key Registry
0 ETH0.000009020.06177601
Remove For1191842632024-04-24 14:01:434 hrs ago1713967303IN
Farcaster: Key Registry
0 ETH0.000008920.06109007
Remove For1191777002024-04-24 10:22:577 hrs ago1713954177IN
Farcaster: Key Registry
0 ETH0.000010090.06078208
Remove For1191741402024-04-24 8:24:179 hrs ago1713947057IN
Farcaster: Key Registry
0 ETH0.000010970.06090855
Remove For1191724572024-04-24 7:28:1110 hrs ago1713943691IN
Farcaster: Key Registry
0 ETH0.000008040.06099773
Remove For1191679572024-04-24 4:58:1113 hrs ago1713934691IN
Farcaster: Key Registry
0 ETH0.000008040.06105189
Remove For1191679412024-04-24 4:57:3913 hrs ago1713934659IN
Farcaster: Key Registry
0 ETH0.000008060.06121469
Remove For1191679312024-04-24 4:57:1913 hrs ago1713934639IN
Farcaster: Key Registry
0 ETH0.000007690.05841028
Remove For1191679212024-04-24 4:56:5913 hrs ago1713934619IN
Farcaster: Key Registry
0 ETH0.000009910.05974073
Remove For1191677952024-04-24 4:52:4713 hrs ago1713934367IN
Farcaster: Key Registry
0 ETH0.000011150.0618488
Remove For1191676112024-04-24 4:46:3913 hrs ago1713933999IN
Farcaster: Key Registry
0 ETH0.000011190.06207292
Remove For1191674072024-04-24 4:39:5113 hrs ago1713933591IN
Farcaster: Key Registry
0 ETH0.000010090.06081842
Remove For1191671842024-04-24 4:32:2513 hrs ago1713933145IN
Farcaster: Key Registry
0 ETH0.000010150.06118626
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1118163592023-11-06 0:44:55170 days ago1699231495  Contract Creation0 ETH

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Contract Source Code Verified (Exact Match)

Contract Name:
KeyRegistry

Compiler Version
v0.8.21+commit.d9974bed

Optimization Enabled:
Yes with 100000 runs

Other Settings:
paris EvmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 30 : KeyRegistry.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

import {Ownable2Step} from "openzeppelin/contracts/access/Ownable2Step.sol";

import {IKeyRegistry} from "./interfaces/IKeyRegistry.sol";
import {IMetadataValidator} from "./interfaces/IMetadataValidator.sol";
import {IdRegistryLike} from "./interfaces/IdRegistryLike.sol";
import {EIP712} from "./abstract/EIP712.sol";
import {Migration} from "./abstract/Migration.sol";
import {Nonces} from "./abstract/Nonces.sol";
import {Signatures} from "./abstract/Signatures.sol";
import {EnumerableKeySet, KeySet} from "./libraries/EnumerableKeySet.sol";

/**
 * @title Farcaster KeyRegistry
 *
 * @notice See https://github.com/farcasterxyz/contracts/blob/v3.1.0/docs/docs.md for an overview.
 *
 * @custom:security-contact [email protected]
 */
contract KeyRegistry is IKeyRegistry, Migration, Signatures, EIP712, Nonces {
    using EnumerableKeySet for KeySet;

    /*//////////////////////////////////////////////////////////////
                              CONSTANTS
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IKeyRegistry
     */
    string public constant VERSION = "2023.11.15";

    /**
     * @inheritdoc IKeyRegistry
     */
    bytes32 public constant REMOVE_TYPEHASH =
        keccak256("Remove(address owner,bytes key,uint256 nonce,uint256 deadline)");

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

    /**
     * @inheritdoc IKeyRegistry
     */
    IdRegistryLike public idRegistry;

    /**
     * @inheritdoc IKeyRegistry
     */
    address public keyGateway;

    /**
     * @inheritdoc IKeyRegistry
     */
    bool public gatewayFrozen;

    /**
     * @inheritdoc IKeyRegistry
     */
    uint256 public maxKeysPerFid;

    /**
     * @dev Internal enumerable set tracking active keys by fid.
     */
    mapping(uint256 fid => KeySet activeKeys) internal _activeKeysByFid;

    /**
     * @dev Internal enumerable set tracking removed keys by fid.
     */
    mapping(uint256 fid => KeySet removedKeys) internal _removedKeysByFid;

    /**
     * @dev Mapping of fid to a key to the key's data.
     *
     * @custom:param fid       The fid associated with the key.
     * @custom:param key       Bytes of the key.
     * @custom:param data      Struct with the state and key type. In the initial migration
     *                         all keys will have data.keyType == 1.
     */
    mapping(uint256 fid => mapping(bytes key => KeyData data)) public keys;

    /**
     * @dev Mapping of keyType to metadataType to validator contract.
     *
     * @custom:param keyType      Numeric keyType.
     * @custom:param metadataType Metadata metadataType.
     * @custom:param validator    Validator contract implementing IMetadataValidator.
     */
    mapping(uint32 keyType => mapping(uint8 metadataType => IMetadataValidator validator)) public validators;

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

    /**
     * @notice Set the IdRegistry and owner.
     *
     * @param _idRegistry    IdRegistry contract address.
     * @param _migrator      Migrator address.
     * @param _initialOwner  Initial contract owner address.
     * @param _maxKeysPerFid Maximum number of keys per fid.
     */
    constructor(
        address _idRegistry,
        address _migrator,
        address _initialOwner,
        uint256 _maxKeysPerFid
    ) Migration(24 hours, _migrator, _initialOwner) EIP712("Farcaster KeyRegistry", "1") {
        idRegistry = IdRegistryLike(_idRegistry);
        maxKeysPerFid = _maxKeysPerFid;
        emit SetIdRegistry(address(0), _idRegistry);
        emit SetMaxKeysPerFid(0, _maxKeysPerFid);
    }

    /*//////////////////////////////////////////////////////////////
                                  VIEWS
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IKeyRegistry
     */
    function totalKeys(uint256 fid, KeyState state) public view virtual returns (uint256) {
        return _keysByState(fid, state).length();
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function keyAt(uint256 fid, KeyState state, uint256 index) external view returns (bytes memory) {
        return _keysByState(fid, state).at(index);
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function keysOf(uint256 fid, KeyState state) external view returns (bytes[] memory) {
        return _keysByState(fid, state).values();
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function keysOf(
        uint256 fid,
        KeyState state,
        uint256 startIdx,
        uint256 batchSize
    ) external view returns (bytes[] memory page, uint256 nextIdx) {
        KeySet storage _keys = _keysByState(fid, state);
        uint256 len = _keys.length();
        if (startIdx >= len) return (new bytes[](0), 0);

        uint256 remaining = len - startIdx;
        uint256 adjustedBatchSize = remaining < batchSize ? remaining : batchSize;

        page = new bytes[](adjustedBatchSize);
        for (uint256 i = 0; i < adjustedBatchSize; i++) {
            page[i] = _keys.at(startIdx + i);
        }

        nextIdx = startIdx + adjustedBatchSize;
        if (nextIdx >= len) nextIdx = 0;

        return (page, nextIdx);
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function keyDataOf(uint256 fid, bytes calldata key) external view returns (KeyData memory) {
        return keys[fid][key];
    }

    /*//////////////////////////////////////////////////////////////
                              REGISTRATION
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IKeyRegistry
     */
    function add(
        address fidOwner,
        uint32 keyType,
        bytes calldata key,
        uint8 metadataType,
        bytes calldata metadata
    ) external whenNotPaused {
        if (msg.sender != keyGateway) revert Unauthorized();
        _add(_fidOf(fidOwner), keyType, key, metadataType, metadata);
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function remove(bytes calldata key) external whenNotPaused {
        _remove(_fidOf(msg.sender), key);
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function removeFor(
        address fidOwner,
        bytes calldata key,
        uint256 deadline,
        bytes calldata sig
    ) external whenNotPaused {
        _verifyRemoveSig(fidOwner, key, deadline, sig);
        _remove(_fidOf(fidOwner), key);
    }

    /*//////////////////////////////////////////////////////////////
                                MIGRATION
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IKeyRegistry
     */
    function bulkAddKeysForMigration(BulkAddData[] calldata items) external onlyMigrator {
        // Safety: i and j can be incremented unchecked since they are bound by items.length and
        // items[i].keys.length respectively.
        unchecked {
            for (uint256 i = 0; i < items.length; i++) {
                BulkAddData calldata item = items[i];
                for (uint256 j = 0; j < item.keys.length; j++) {
                    _add(item.fid, 1, item.keys[j].key, 1, item.keys[j].metadata, false);
                }
            }
        }
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function bulkResetKeysForMigration(BulkResetData[] calldata items) external onlyMigrator {
        // Safety: i and j can be incremented unchecked since they are bound by items.length and
        // items[i].keys.length respectively.
        unchecked {
            for (uint256 i = 0; i < items.length; i++) {
                BulkResetData calldata item = items[i];
                for (uint256 j = 0; j < item.keys.length; j++) {
                    _reset(item.fid, item.keys[j]);
                }
            }
        }
    }

    /*//////////////////////////////////////////////////////////////
                                 ADMIN
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IKeyRegistry
     */
    function setValidator(uint32 keyType, uint8 metadataType, IMetadataValidator validator) external onlyOwner {
        if (keyType == 0) revert InvalidKeyType();
        if (metadataType == 0) revert InvalidMetadataType();
        emit SetValidator(keyType, metadataType, address(validators[keyType][metadataType]), address(validator));
        validators[keyType][metadataType] = validator;
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function setIdRegistry(address _idRegistry) external onlyOwner {
        emit SetIdRegistry(address(idRegistry), _idRegistry);
        idRegistry = IdRegistryLike(_idRegistry);
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function setKeyGateway(address _keyGateway) external onlyOwner {
        if (gatewayFrozen) revert GatewayFrozen();
        emit SetKeyGateway(keyGateway, _keyGateway);
        keyGateway = _keyGateway;
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function freezeKeyGateway() external onlyOwner {
        if (gatewayFrozen) revert GatewayFrozen();
        emit FreezeKeyGateway(keyGateway);
        gatewayFrozen = true;
    }

    /**
     * @inheritdoc IKeyRegistry
     */
    function setMaxKeysPerFid(uint256 _maxKeysPerFid) external onlyOwner {
        if (_maxKeysPerFid <= maxKeysPerFid) revert InvalidMaxKeys();
        emit SetMaxKeysPerFid(maxKeysPerFid, _maxKeysPerFid);
        maxKeysPerFid = _maxKeysPerFid;
    }

    /*//////////////////////////////////////////////////////////////
                                 HELPERS
    //////////////////////////////////////////////////////////////*/

    function _add(
        uint256 fid,
        uint32 keyType,
        bytes calldata key,
        uint8 metadataType,
        bytes calldata metadata
    ) internal {
        _add(fid, keyType, key, metadataType, metadata, true);
    }

    function _add(
        uint256 fid,
        uint32 keyType,
        bytes calldata key,
        uint8 metadataType,
        bytes calldata metadata,
        bool validate
    ) internal {
        KeyData storage keyData = keys[fid][key];
        if (keyData.state != KeyState.NULL) revert InvalidState();
        if (totalKeys(fid, KeyState.ADDED) >= maxKeysPerFid) revert ExceedsMaximum();

        IMetadataValidator validator = validators[keyType][metadataType];
        if (validator == IMetadataValidator(address(0))) {
            revert ValidatorNotFound(keyType, metadataType);
        }

        _addToKeySet(fid, key);
        keyData.state = KeyState.ADDED;
        keyData.keyType = keyType;
        emit Add(fid, keyType, key, key, metadataType, metadata);

        if (validate) {
            bool isValid = validator.validate(fid, key, metadata);
            if (!isValid) revert InvalidMetadata();
        }
    }

    function _remove(uint256 fid, bytes calldata key) internal {
        KeyData storage keyData = keys[fid][key];
        if (keyData.state != KeyState.ADDED) revert InvalidState();

        _removeFromKeySet(fid, key);
        keyData.state = KeyState.REMOVED;
        emit Remove(fid, key, key);
    }

    function _reset(uint256 fid, bytes calldata key) internal {
        KeyData storage keyData = keys[fid][key];
        if (keyData.state != KeyState.ADDED) revert InvalidState();

        _resetFromKeySet(fid, key);
        keyData.state = KeyState.NULL;
        delete keyData.keyType;
        emit AdminReset(fid, key, key);
    }

    /*//////////////////////////////////////////////////////////////
                     SIGNATURE VERIFICATION HELPERS
    //////////////////////////////////////////////////////////////*/

    function _verifyRemoveSig(address fidOwner, bytes calldata key, uint256 deadline, bytes calldata sig) internal {
        _verifySig(
            _hashTypedDataV4(
                keccak256(abi.encode(REMOVE_TYPEHASH, fidOwner, keccak256(key), _useNonce(fidOwner), deadline))
            ),
            fidOwner,
            deadline,
            sig
        );
    }

    /*//////////////////////////////////////////////////////////////
                           FID HELPERS
    //////////////////////////////////////////////////////////////*/

    function _fidOf(address fidOwner) internal view returns (uint256 fid) {
        fid = idRegistry.idOf(fidOwner);
        if (fid == 0) revert Unauthorized();
    }

    /*//////////////////////////////////////////////////////////////
                         KEY SET HELPERS
    //////////////////////////////////////////////////////////////*/

    function _addToKeySet(uint256 fid, bytes calldata key) internal virtual {
        _activeKeysByFid[fid].add(key);
    }

    function _removeFromKeySet(uint256 fid, bytes calldata key) internal virtual {
        _activeKeysByFid[fid].remove(key);
        _removedKeysByFid[fid].add(key);
    }

    function _resetFromKeySet(uint256 fid, bytes calldata key) internal virtual {
        _activeKeysByFid[fid].remove(key);
    }

    function _keysByState(uint256 fid, KeyState state) internal view returns (KeySet storage) {
        if (state == KeyState.ADDED) {
            return _activeKeysByFid[fid];
        } else if (state == KeyState.REMOVED) {
            return _removedKeysByFid[fid];
        } else {
            revert InvalidState();
        }
    }
}

File 2 of 30 : Ownable2Step.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.0;

import "./Ownable.sol";

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

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

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

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

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

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

File 3 of 30 : IKeyRegistry.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

import {IMetadataValidator} from "./IMetadataValidator.sol";
import {IdRegistryLike} from "./IdRegistryLike.sol";

interface IKeyRegistry {
    /*//////////////////////////////////////////////////////////////
                                 ERRORS
    //////////////////////////////////////////////////////////////*/

    /// @dev Revert if a key violates KeyState transition rules.
    error InvalidState();

    /// @dev Revert if adding a key exceeds the maximum number of allowed keys per fid.
    error ExceedsMaximum();

    /// @dev Revert if a validator has not been registered for this keyType and metadataType.
    error ValidatorNotFound(uint32 keyType, uint8 metadataType);

    /// @dev Revert if metadata validation failed.
    error InvalidMetadata();

    /// @dev Revert if the admin sets a validator for keyType 0.
    error InvalidKeyType();

    /// @dev Revert if the admin sets a validator for metadataType 0.
    error InvalidMetadataType();

    /// @dev Revert if the caller does not have the authority to perform the action.
    error Unauthorized();

    /// @dev Revert if the owner sets maxKeysPerFid equal to or below its current value.
    error InvalidMaxKeys();

    /// @dev Revert when the gateway dependency is permanently frozen.
    error GatewayFrozen();

    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Emit an event when an admin or fid adds a new key.
     *
     *      Hubs listen for this, validate that keyBytes is an EdDSA pub key and keyType == 1 and
     *      add keyBytes to its SignerStore. Messages signed by keyBytes with `fid` are now valid
     *      and accepted over gossip, sync and client apis. Hubs assume the invariants:
     *
     *      1. Add(fid, ..., key, keyBytes, ...) cannot emit if there is an earlier emit with
     *         Add(fid, ..., key, keyBytes, ...) and no AdminReset(fid, key, keyBytes) inbetween.
     *
     *      2. Add(fid, ..., key, keyBytes, ...) cannot emit if there is an earlier emit with
     *         Remove(fid, key, keyBytes).
     *
     *      3. For all Add(..., ..., key, keyBytes, ...), key = keccak(keyBytes)
     *
     * @param fid          The fid associated with the key.
     * @param keyType      The type of the key.
     * @param key          The key being registered. (indexed as hash)
     * @param keyBytes     The bytes of the key being registered.
     * @param metadataType The type of the metadata.
     * @param metadata     Metadata about the key.
     */
    event Add(
        uint256 indexed fid,
        uint32 indexed keyType,
        bytes indexed key,
        bytes keyBytes,
        uint8 metadataType,
        bytes metadata
    );

    /**
     * @dev Emit an event when an fid removes an added key.
     *
     *      Hubs listen for this, validate that keyType == 1 and keyBytes exists in its SignerStore.
     *      keyBytes is marked as removed, messages signed by keyBytes with `fid` are invalid,
     *      dropped immediately and no longer accepted. Hubs assume the invariants:
     *
     *      1. Remove(fid, key, keyBytes) cannot emit if there is no earlier emit with
     *         Add(fid, ..., key, keyBytes, ...)
     *
     *      2. Remove(fid, key, keyBytes) cannot emit if there is an earlier emit with
     *         Remove(fid, key, keyBytes)
     *
     *      3. For all Remove(..., key, keyBytes), key = keccak(keyBytes)
     *
     * @param fid       The fid associated with the key.
     * @param key       The key being registered. (indexed as hash)
     * @param keyBytes  The bytes of the key being registered.
     */
    event Remove(uint256 indexed fid, bytes indexed key, bytes keyBytes);

    /**
     * @dev Emit an event when an admin resets an added key.
     *
     *      Hubs listen for this, validate that keyType == 1 and that keyBytes exists in its SignerStore.
     *      keyBytes is no longer tracked, messages signed by keyBytes with `fid` are invalid, dropped
     *      immediately and not accepted. Hubs assume the following invariants:
     *
     *      1. AdminReset(fid, key, keyBytes) cannot emit unless the most recent event for the fid
     *         was Add(fid, ..., key, keyBytes, ...).
     *
     *      2. For all AdminReset(..., key, keyBytes), key = keccak(keyBytes).
     *
     *      3. AdminReset() cannot emit after Migrated().
     *
     * @param fid       The fid associated with the key.
     * @param key       The key being reset. (indexed as hash)
     * @param keyBytes  The bytes of the key being registered.
     */
    event AdminReset(uint256 indexed fid, bytes indexed key, bytes keyBytes);

    /**
     * @dev Emit an event when the admin sets a metadata validator contract for a given
     *      keyType and metadataType.
     *
     * @param keyType      The numeric keyType associated with this validator.
     * @param metadataType The metadataType associated with this validator.
     * @param oldValidator The previous validator contract address.
     * @param newValidator The new validator contract address.
     */
    event SetValidator(uint32 keyType, uint8 metadataType, address oldValidator, address newValidator);

    /**
     * @dev Emit an event when the admin sets a new IdRegistry contract address.
     *
     * @param oldIdRegistry The previous IdRegistry address.
     * @param newIdRegistry The new IdRegistry address.
     */
    event SetIdRegistry(address oldIdRegistry, address newIdRegistry);

    /**
     * @dev Emit an event when the admin sets a new KeyGateway address.
     *
     * @param oldKeyGateway The previous KeyGateway address.
     * @param newKeyGateway The new KeyGateway address.
     */
    event SetKeyGateway(address oldKeyGateway, address newKeyGateway);

    /**
     * @dev Emit an event when the admin sets a new maximum keys per fid.
     *
     * @param oldMax The previous maximum.
     * @param newMax The new maximum.
     */
    event SetMaxKeysPerFid(uint256 oldMax, uint256 newMax);

    /**
     * @dev Emit an event when the contract owner permanently freezes the KeyGateway address.
     *
     * @param keyGateway The permanent KeyGateway address.
     */
    event FreezeKeyGateway(address keyGateway);

    /*//////////////////////////////////////////////////////////////
                                 STRUCTS
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice State enumeration for a key in the registry. During migration, an admin can change
     *          the state of any fids key from NULL to ADDED or ADDED to NULL. After migration, an
     *          fid can change the state of a key from NULL to ADDED or ADDED to REMOVED only.
     *
     *          - NULL: The key is not in the registry.
     *          - ADDED: The key has been added to the registry.
     *          - REMOVED: The key was added to the registry but is now removed.
     */
    enum KeyState {
        NULL,
        ADDED,
        REMOVED
    }

    /**
     *  @notice Data about a key.
     *
     *  @param state   The current state of the key.
     *  @param keyType Numeric ID representing the manner in which the key should be used.
     */
    struct KeyData {
        KeyState state;
        uint32 keyType;
    }

    /**
     * @dev Struct argument for bulk add function, representing an FID
     *      and its associated keys.
     *
     * @param fid  Fid associated with provided keys to add.
     * @param keys Array of BulkAddKey structs, including key and metadata.
     */
    struct BulkAddData {
        uint256 fid;
        BulkAddKey[] keys;
    }

    /**
     * @dev Struct argument for bulk add function, representing a key
     *      and its associated metadata.
     *
     * @param key  Bytes of the signer key.
     * @param keys Metadata metadata of the signer key.
     */
    struct BulkAddKey {
        bytes key;
        bytes metadata;
    }

    /**
     * @dev Struct argument for bulk reset function, representing an FID
     *      and its associated keys.
     *
     * @param fid  Fid associated with provided keys to reset.
     * @param keys Array of keys to reset.
     */
    struct BulkResetData {
        uint256 fid;
        bytes[] keys;
    }

    /*//////////////////////////////////////////////////////////////
                              CONSTANTS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Contract version specified in the Farcaster protocol version scheme.
     */
    function VERSION() external view returns (string memory);

    /**
     * @notice EIP-712 typehash for Remove signatures.
     */
    function REMOVE_TYPEHASH() external view returns (bytes32);

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

    /**
     * @notice The IdRegistry contract.
     */
    function idRegistry() external view returns (IdRegistryLike);

    /**
     * @notice The KeyGateway address.
     */
    function keyGateway() external view returns (address);

    /**
     * @notice Whether the KeyGateway address is permanently frozen.
     */
    function gatewayFrozen() external view returns (bool);

    /**
     * @notice Maximum number of keys per fid.
     */
    function maxKeysPerFid() external view returns (uint256);

    /*//////////////////////////////////////////////////////////////
                                  VIEWS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Return number of active keys for a given fid.
     *
     * @param fid the fid associated with the keys.
     *
     * @return uint256 total number of active keys associated with the fid.
     */
    function totalKeys(uint256 fid, KeyState state) external view returns (uint256);

    /**
     * @notice Return key at the given index in the fid's key set. Can be
     *         called to enumerate all active keys for a given fid.
     *
     * @param fid   the fid associated with the key.
     * @param index index of the key in the fid's key set. Must be a value
     *              less than totalKeys(fid). Note that because keys are
     *              stored in an underlying enumerable set, the ordering of
     *              keys is not guaranteed to be stable.
     *
     * @return bytes Bytes of the key.
     */
    function keyAt(uint256 fid, KeyState state, uint256 index) external view returns (bytes memory);

    /**
     * @notice Return an array of all active keys for a given fid.
     * @dev    WARNING: This function will copy the entire key set to memory,
     *         which can be quite expensive. This is intended to be called
     *         offchain with eth_call, not onchain.
     *
     * @param fid the fid associated with the keys.
     *
     * @return bytes[] Array of all keys.
     */
    function keysOf(uint256 fid, KeyState state) external view returns (bytes[] memory);

    /**
     * @notice Return an array of all active keys for a given fid,
     *         paged by index and batch size.
     *
     * @param fid       The fid associated with the keys.
     * @param startIdx  Start index of lookup.
     * @param batchSize Number of items to return.
     *
     * @return page    Array of keys.
     * @return nextIdx Next index in the set of all keys.
     */
    function keysOf(
        uint256 fid,
        KeyState state,
        uint256 startIdx,
        uint256 batchSize
    ) external view returns (bytes[] memory page, uint256 nextIdx);

    /**
     * @notice Retrieve state and type data for a given key.
     *
     * @param fid   The fid associated with the key.
     * @param key   Bytes of the key.
     *
     * @return KeyData struct that contains the state and keyType.
     */
    function keyDataOf(uint256 fid, bytes calldata key) external view returns (KeyData memory);

    /*//////////////////////////////////////////////////////////////
                              REMOVE KEYS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Remove a key associated with the caller's fid, setting the key state to REMOVED.
     *         The key must be in the ADDED state.
     *
     * @param key   Bytes of the key to remove.
     */
    function remove(bytes calldata key) external;

    /**
     * @notice Remove a key on behalf of another fid owner, setting the key state to REMOVED.
     *         caller must supply a valid EIP-712 Remove signature from the fid owner.
     *
     * @param fidOwner The fid owner address.
     * @param key      Bytes of the key to remove.
     * @param deadline Deadline after which the signature expires.
     * @param sig      EIP-712 Remove signature generated by fid owner.
     */
    function removeFor(address fidOwner, bytes calldata key, uint256 deadline, bytes calldata sig) external;

    /*//////////////////////////////////////////////////////////////
                         PERMISSIONED ACTIONS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Add a key associated with fidOwner's fid, setting the key state to ADDED.
     *         Can only be called by the keyGateway address.
     *
     * @param keyType      The key's numeric keyType.
     * @param key          Bytes of the key to add.
     * @param metadataType Metadata type ID.
     * @param metadata     Metadata about the key, which is not stored and only emitted in an event.
     */
    function add(
        address fidOwner,
        uint32 keyType,
        bytes calldata key,
        uint8 metadataType,
        bytes calldata metadata
    ) external;

    /**
     * @notice Add multiple keys as part of the initial migration. Only callable by the contract owner.
     *
     * @param items An array of BulkAddData structs including fid and array of BulkAddKey structs.
     */
    function bulkAddKeysForMigration(BulkAddData[] calldata items) external;

    /**
     * @notice Reset multiple keys as part of the initial migration. Only callable by the contract owner.
     *         Reset is not the same as removal: this function sets the key state back to NULL,
     *         rather than REMOVED. This allows the owner to correct any errors in the initial migration until
     *         the grace period expires.
     *
     * @param items   A list of BulkResetData structs including an fid and array of keys.
     */
    function bulkResetKeysForMigration(BulkResetData[] calldata items) external;

    /**
     * @notice Set a metadata validator contract for the given keyType and metadataType. Only callable by owner.
     *
     * @param keyType      The numeric key type ID associated with this validator.
     * @param metadataType The numeric metadata type ID associated with this validator.
     * @param validator    Contract implementing IMetadataValidator.
     */
    function setValidator(uint32 keyType, uint8 metadataType, IMetadataValidator validator) external;

    /**
     * @notice Set the IdRegistry contract address. Only callable by owner.
     *
     * @param _idRegistry The new IdRegistry address.
     */
    function setIdRegistry(address _idRegistry) external;

    /**
     * @notice Set the KeyGateway address allowed to add keys. Only callable by owner.
     *
     * @param _keyGateway The new KeyGateway address.
     */
    function setKeyGateway(address _keyGateway) external;

    /**
     * @notice Permanently freeze the KeyGateway address. Only callable by owner.
     */
    function freezeKeyGateway() external;

    /**
     * @notice Set the maximum number of keys allowed per fid. Only callable by owner.
     *
     * @param _maxKeysPerFid The new max keys per fid.
     */
    function setMaxKeysPerFid(uint256 _maxKeysPerFid) external;
}

File 4 of 30 : IMetadataValidator.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

interface IMetadataValidator {
    /**
     * @notice Validate metadata associated with a key.
     *
     * @param userFid      The fid associated with the key.
     * @param key          Bytes of the key.
     * @param metadata     Metadata about the key.
     *
     * @return bool Whether the provided key and metadata are valid.
     */
    function validate(uint256 userFid, bytes memory key, bytes memory metadata) external returns (bool);
}

File 5 of 30 : IdRegistryLike.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

/**
 * @dev Minimal interface for IdRegistry, used by the KeyRegistry.
 */
interface IdRegistryLike {
    /*//////////////////////////////////////////////////////////////
                                 STORAGE
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Maps each address to an fid, or zero if it does not own an fid.
     */
    function idOf(address fidOwner) external view returns (uint256);

    /*//////////////////////////////////////////////////////////////
                                 VIEWS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Verify that a signature was produced by the custody address that owns an fid.
     *
     * @param custodyAddress   The address to check the signature of.
     * @param fid              The fid to check the signature of.
     * @param digest           The digest that was signed.
     * @param sig              The signature to check.
     *
     * @return isValid Whether provided signature is valid.
     */
    function verifyFidSignature(
        address custodyAddress,
        uint256 fid,
        bytes32 digest,
        bytes calldata sig
    ) external view returns (bool isValid);
}

File 6 of 30 : EIP712.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

import {EIP712 as EIP712Base} from "openzeppelin/contracts/utils/cryptography/EIP712.sol";

import {IEIP712} from "../interfaces/abstract/IEIP712.sol";

abstract contract EIP712 is IEIP712, EIP712Base {
    constructor(string memory name, string memory version) EIP712Base(name, version) {}

    /*//////////////////////////////////////////////////////////////
                           EIP-712 HELPERS
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IEIP712
     */
    function domainSeparatorV4() external view returns (bytes32) {
        return _domainSeparatorV4();
    }

    /**
     * @inheritdoc IEIP712
     */
    function hashTypedDataV4(bytes32 structHash) external view returns (bytes32) {
        return _hashTypedDataV4(structHash);
    }
}

File 7 of 30 : Migration.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

import {Guardians} from "../abstract/Guardians.sol";
import {IMigration} from "../interfaces/abstract/IMigration.sol";

abstract contract Migration is IMigration, Guardians {
    /*//////////////////////////////////////////////////////////////
                              IMMUTABLES
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IMigration
     */
    uint24 public immutable gracePeriod;

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

    /**
     * @inheritdoc IMigration
     */
    address public migrator;

    /**
     * @inheritdoc IMigration
     */
    uint40 public migratedAt;

    /*//////////////////////////////////////////////////////////////
                                 MODIFIERS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Allow only the migrator to call the protected function.
     *         Revoke permissions after the migration period.
     */
    modifier onlyMigrator() {
        if (msg.sender != migrator) revert OnlyMigrator();
        if (isMigrated() && block.timestamp > migratedAt + gracePeriod) {
            revert PermissionRevoked();
        }
        _requirePaused();
        _;
    }

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

    /**
     * @notice Set the grace period and migrator address.
     *         Pauses contract at deployment time.
     *
     * @param _gracePeriod  Migration grace period in seconds.
     * @param _initialOwner Initial owner address. Set as migrator.
     */
    constructor(uint24 _gracePeriod, address _migrator, address _initialOwner) Guardians(_initialOwner) {
        gracePeriod = _gracePeriod;
        migrator = _migrator;
        emit SetMigrator(address(0), _migrator);
        _pause();
    }

    /*//////////////////////////////////////////////////////////////
                                  VIEWS
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IMigration
     */
    function isMigrated() public view returns (bool) {
        return migratedAt != 0;
    }

    /*//////////////////////////////////////////////////////////////
                                MIGRATION
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IMigration
     */
    function migrate() external {
        if (msg.sender != migrator) revert OnlyMigrator();
        if (isMigrated()) revert AlreadyMigrated();
        _requirePaused();
        migratedAt = uint40(block.timestamp);
        emit Migrated(migratedAt);
    }

    /*//////////////////////////////////////////////////////////////
                              SET MIGRATOR
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IMigration
     */
    function setMigrator(address _migrator) public onlyOwner {
        if (isMigrated()) revert AlreadyMigrated();
        _requirePaused();
        emit SetMigrator(migrator, _migrator);
        migrator = _migrator;
    }
}

File 8 of 30 : Nonces.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

import {Nonces as NoncesBase} from "openzeppelin-latest/contracts/utils/Nonces.sol";
import {INonces} from "../interfaces/abstract/INonces.sol";

abstract contract Nonces is INonces, NoncesBase {
    /*//////////////////////////////////////////////////////////////
                          NONCE MANAGEMENT
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc INonces
     */
    function useNonce() external returns (uint256) {
        return _useNonce(msg.sender);
    }
}

File 9 of 30 : Signatures.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

import {SignatureChecker} from "openzeppelin/contracts/utils/cryptography/SignatureChecker.sol";
import {ISignatures} from "../interfaces/abstract/ISignatures.sol";

abstract contract Signatures is ISignatures {
    /*//////////////////////////////////////////////////////////////
                     SIGNATURE VERIFICATION HELPERS
    //////////////////////////////////////////////////////////////*/

    function _verifySig(bytes32 digest, address signer, uint256 deadline, bytes memory sig) internal view {
        if (block.timestamp > deadline) revert SignatureExpired();
        if (!SignatureChecker.isValidSignatureNow(signer, digest, sig)) {
            revert InvalidSignature();
        }
    }
}

File 10 of 30 : EnumerableKeySet.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

struct KeySet {
    // Storage of set values
    bytes[] _values;
    // Position of the value in the `values` array, plus 1 because index 0
    // means a value is not in the set.
    mapping(bytes => uint256) _indexes;
}

/**
 * @dev Modified from OpenZeppelin v4.9.3 EnumerableSet
 */
library EnumerableKeySet {
    /**
     * @dev Add a key to the set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(KeySet storage set, bytes calldata value) internal returns (bool) {
        if (!contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a key from the set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(KeySet storage set, bytes calldata value) internal returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes memory lastValue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(KeySet storage set, bytes calldata value) internal view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(KeySet storage set) internal view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(KeySet storage set, uint256 index) internal view returns (bytes memory) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(KeySet storage set) internal view returns (bytes[] memory) {
        return set._values;
    }
}

File 11 of 30 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

File 12 of 30 : EIP712.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/EIP712.sol)

pragma solidity ^0.8.8;

import "./ECDSA.sol";
import "../ShortStrings.sol";
import "../../interfaces/IERC5267.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic 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 their contracts 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: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain
 * separator of the implementation contract. This will cause the `_domainSeparatorV4` function to always rebuild the
 * separator from the immutable values, which is cheaper than accessing a cached version in cold storage.
 *
 * _Available since v3.4._
 *
 * @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
 */
abstract contract EIP712 is IERC5267 {
    using ShortStrings for *;

    bytes32 private constant _TYPE_HASH =
        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");

    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _cachedDomainSeparator;
    uint256 private immutable _cachedChainId;
    address private immutable _cachedThis;

    bytes32 private immutable _hashedName;
    bytes32 private immutable _hashedVersion;

    ShortString private immutable _name;
    ShortString private immutable _version;
    string private _nameFallback;
    string private _versionFallback;

    /**
     * @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].
     */
    constructor(string memory name, string memory version) {
        _name = name.toShortStringWithFallback(_nameFallback);
        _version = version.toShortStringWithFallback(_versionFallback);
        _hashedName = keccak256(bytes(name));
        _hashedVersion = keccak256(bytes(version));

        _cachedChainId = block.chainid;
        _cachedDomainSeparator = _buildDomainSeparator();
        _cachedThis = address(this);
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _cachedThis && block.chainid == _cachedChainId) {
            return _cachedDomainSeparator;
        } else {
            return _buildDomainSeparator();
        }
    }

    function _buildDomainSeparator() private view returns (bytes32) {
        return keccak256(abi.encode(_TYPE_HASH, _hashedName, _hashedVersion, 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 ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }

    /**
     * @dev See {EIP-5267}.
     *
     * _Available since v4.9._
     */
    function eip712Domain()
        public
        view
        virtual
        override
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        )
    {
        return (
            hex"0f", // 01111
            _name.toStringWithFallback(_nameFallback),
            _version.toStringWithFallback(_versionFallback),
            block.chainid,
            address(this),
            bytes32(0),
            new uint256[](0)
        );
    }
}

File 13 of 30 : IEIP712.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

interface IEIP712 {
    /*//////////////////////////////////////////////////////////////
                           EIP-712 HELPERS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Helper view to read EIP-712 domain separator.
     *
     * @return bytes32 domain separator hash.
     */
    function domainSeparatorV4() external view returns (bytes32);

    /**
     * @notice Helper view to hash EIP-712 typed data onchain.
     *
     * @param structHash EIP-712 typed data hash.
     *
     * @return bytes32 EIP-712 message digest.
     */
    function hashTypedDataV4(bytes32 structHash) external view returns (bytes32);
}

File 14 of 30 : Guardians.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

import {Ownable2Step} from "openzeppelin/contracts/access/Ownable2Step.sol";
import {Pausable} from "openzeppelin/contracts/security/Pausable.sol";

import {IGuardians} from "../interfaces/abstract/IGuardians.sol";

abstract contract Guardians is IGuardians, Ownable2Step, Pausable {
    /**
     * @notice Mapping of addresses to guardian status.
     */
    mapping(address guardian => bool isGuardian) public guardians;

    /*//////////////////////////////////////////////////////////////
                               MODIFIERS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Allow only the owner or a guardian to call the
     *         protected function.
     */
    modifier onlyGuardian() {
        if (msg.sender != owner() && !guardians[msg.sender]) {
            revert OnlyGuardian();
        }
        _;
    }

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

    /**
     * @notice Set the initial owner address.
     *
     * @param _initialOwner Address of the contract owner.
     */
    constructor(address _initialOwner) {
        _transferOwnership(_initialOwner);
    }

    /*//////////////////////////////////////////////////////////////
                         PERMISSIONED FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    /**
     * @inheritdoc IGuardians
     */
    function addGuardian(address guardian) external onlyOwner {
        guardians[guardian] = true;
        emit Add(guardian);
    }

    /**
     * @inheritdoc IGuardians
     */
    function removeGuardian(address guardian) external onlyOwner {
        guardians[guardian] = false;
        emit Remove(guardian);
    }

    /**
     * @inheritdoc IGuardians
     */
    function pause() external onlyGuardian {
        _pause();
    }

    /**
     * @inheritdoc IGuardians
     */
    function unpause() external onlyOwner {
        _unpause();
    }
}

File 15 of 30 : IMigration.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

interface IMigration {
    /*//////////////////////////////////////////////////////////////
                                 ERRORS
    //////////////////////////////////////////////////////////////*/

    /// @dev Revert if the caller is not the migrator.
    error OnlyMigrator();

    /// @dev Revert if the migrator calls a migration function after the grace period.
    error PermissionRevoked();

    /// @dev Revert if the migrator calls migrate more than once.
    error AlreadyMigrated();

    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Emit an event when the admin calls migrate(). Used to migrate
     *      Hubs from reading events from one contract to another.
     *
     * @param migratedAt  The timestamp at which the migration occurred.
     */
    event Migrated(uint256 indexed migratedAt);

    /**
     * @notice Emit an event when the owner changes the migrator address.
     *
     * @param oldMigrator The address of the previous migrator.
     * @param newMigrator The address of the new migrator.
     */
    event SetMigrator(address oldMigrator, address newMigrator);

    /*//////////////////////////////////////////////////////////////
                              IMMUTABLES
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Period in seconds after migration during which admin can continue to call protected
     *         migration functions. Admins can make corrections to the migrated data during the
     *         grace period if necessary, but cannot make changes after it expires.
     */
    function gracePeriod() external view returns (uint24);

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

    /**
     * @notice Migration admin address.
     */
    function migrator() external view returns (address);

    /**
     * @notice Timestamp at which data is migrated. Hubs will cut over to use this contract as their
     *         source of truth after this timestamp.
     */
    function migratedAt() external view returns (uint40);

    /*//////////////////////////////////////////////////////////////
                                  VIEWS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Check if the contract has been migrated.
     *
     * @return true if the contract has been migrated, false otherwise.
     */
    function isMigrated() external view returns (bool);

    /*//////////////////////////////////////////////////////////////
                         PERMISSIONED ACTIONS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Set the time of the migration and emit an event. Hubs will watch this event and
     *         cut over to use this contract as their source of truth after this timestamp.
     *         Only callable by the migrator.
     */
    function migrate() external;

    /**
     * @notice Set the migrator address. Only callable by owner.
     *
     * @param _migrator Migrator address.
     */
    function setMigrator(address _migrator) external;
}

File 16 of 30 : Nonces.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/**
 * @dev Provides tracking nonces for addresses. Nonces will only increment.
 */
abstract contract Nonces {
    /**
     * @dev The nonce used for an `account` is not the expected current nonce.
     */
    error InvalidAccountNonce(address account, uint256 currentNonce);

    mapping(address => uint256) private _nonces;

    /**
     * @dev Returns an the next unused nonce for an address.
     */
    function nonces(address owner) public view virtual returns (uint256) {
        return _nonces[owner];
    }

    /**
     * @dev Consumes a nonce.
     *
     * Returns the current value and increments nonce.
     */
    function _useNonce(address owner) internal virtual returns (uint256) {
        // For each account, the nonce has an initial value of 0, can only be incremented by one, and cannot be
        // decremented or reset. This guarantees that the nonce never overflows.
        unchecked {
            // It is important to do x++ and not ++x here.
            return _nonces[owner]++;
        }
    }

    /**
     * @dev Same as {_useNonce} but checking that `nonce` is the next valid for `owner`.
     */
    function _useCheckedNonce(address owner, uint256 nonce) internal virtual returns (uint256) {
        uint256 current = _useNonce(owner);
        if (nonce != current) {
            revert InvalidAccountNonce(owner, current);
        }
        return current;
    }
}

File 17 of 30 : INonces.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

interface INonces {
    /*//////////////////////////////////////////////////////////////
                          NONCE MANAGEMENT
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Increase caller's nonce, invalidating previous signatures.
     *
     * @return uint256 The caller's new nonce.
     */
    function useNonce() external returns (uint256);
}

File 18 of 30 : SignatureChecker.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/SignatureChecker.sol)

pragma solidity ^0.8.0;

import "./ECDSA.sol";
import "../../interfaces/IERC1271.sol";

/**
 * @dev Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA
 * signatures from externally owned accounts (EOAs) as well as ERC1271 signatures from smart contract wallets like
 * Argent and Gnosis Safe.
 *
 * _Available since v4.1._
 */
library SignatureChecker {
    /**
     * @dev Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the
     * signature is validated against that smart contract using ERC1271, otherwise it's validated using `ECDSA.recover`.
     *
     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
     * change through time. It could return true at block N and false at block N+1 (or the opposite).
     */
    function isValidSignatureNow(address signer, bytes32 hash, bytes memory signature) internal view returns (bool) {
        (address recovered, ECDSA.RecoverError error) = ECDSA.tryRecover(hash, signature);
        return
            (error == ECDSA.RecoverError.NoError && recovered == signer) ||
            isValidERC1271SignatureNow(signer, hash, signature);
    }

    /**
     * @dev Checks if a signature is valid for a given signer and data hash. The signature is validated
     * against the signer smart contract using ERC1271.
     *
     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
     * change through time. It could return true at block N and false at block N+1 (or the opposite).
     */
    function isValidERC1271SignatureNow(
        address signer,
        bytes32 hash,
        bytes memory signature
    ) internal view returns (bool) {
        (bool success, bytes memory result) = signer.staticcall(
            abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, signature)
        );
        return (success &&
            result.length >= 32 &&
            abi.decode(result, (bytes32)) == bytes32(IERC1271.isValidSignature.selector));
    }
}

File 19 of 30 : ISignatures.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

interface ISignatures {
    /*//////////////////////////////////////////////////////////////
                                 ERRORS
    //////////////////////////////////////////////////////////////*/

    /// @dev Revert when the signature provided is invalid.
    error InvalidSignature();

    /// @dev Revert when the block.timestamp is ahead of the signature deadline.
    error SignatureExpired();
}

File 20 of 30 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

File 21 of 30 : ECDSA.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @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,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode 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 {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]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        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.
            /// @solidity memory-safe-assembly
            assembly {
                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);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode 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 {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        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[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        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.
     *
     * _Available since v4.2._
     */
    function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) {
        // 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);
        }

        // 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);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @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) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, "\x19Ethereum Signed Message:\n32")
            mstore(0x1c, hash)
            message := keccak256(0x00, 0x3c)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, "\x19\x01")
            mstore(add(ptr, 0x02), domainSeparator)
            mstore(add(ptr, 0x22), structHash)
            data := keccak256(ptr, 0x42)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Data with intended validator, created from a
     * `validator` and `data` according to the version 0 of EIP-191.
     *
     * See {recover}.
     */
    function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x00", validator, data));
    }
}

File 22 of 30 : ShortStrings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/ShortStrings.sol)

pragma solidity ^0.8.8;

import "./StorageSlot.sol";

// | string  | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA   |
// | length  | 0x                                                              BB |
type ShortString is bytes32;

/**
 * @dev This library provides functions to convert short memory strings
 * into a `ShortString` type that can be used as an immutable variable.
 *
 * Strings of arbitrary length can be optimized using this library if
 * they are short enough (up to 31 bytes) by packing them with their
 * length (1 byte) in a single EVM word (32 bytes). Additionally, a
 * fallback mechanism can be used for every other case.
 *
 * Usage example:
 *
 * ```solidity
 * contract Named {
 *     using ShortStrings for *;
 *
 *     ShortString private immutable _name;
 *     string private _nameFallback;
 *
 *     constructor(string memory contractName) {
 *         _name = contractName.toShortStringWithFallback(_nameFallback);
 *     }
 *
 *     function name() external view returns (string memory) {
 *         return _name.toStringWithFallback(_nameFallback);
 *     }
 * }
 * ```
 */
library ShortStrings {
    // Used as an identifier for strings longer than 31 bytes.
    bytes32 private constant _FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF;

    error StringTooLong(string str);
    error InvalidShortString();

    /**
     * @dev Encode a string of at most 31 chars into a `ShortString`.
     *
     * This will trigger a `StringTooLong` error is the input string is too long.
     */
    function toShortString(string memory str) internal pure returns (ShortString) {
        bytes memory bstr = bytes(str);
        if (bstr.length > 31) {
            revert StringTooLong(str);
        }
        return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length));
    }

    /**
     * @dev Decode a `ShortString` back to a "normal" string.
     */
    function toString(ShortString sstr) internal pure returns (string memory) {
        uint256 len = byteLength(sstr);
        // using `new string(len)` would work locally but is not memory safe.
        string memory str = new string(32);
        /// @solidity memory-safe-assembly
        assembly {
            mstore(str, len)
            mstore(add(str, 0x20), sstr)
        }
        return str;
    }

    /**
     * @dev Return the length of a `ShortString`.
     */
    function byteLength(ShortString sstr) internal pure returns (uint256) {
        uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF;
        if (result > 31) {
            revert InvalidShortString();
        }
        return result;
    }

    /**
     * @dev Encode a string into a `ShortString`, or write it to storage if it is too long.
     */
    function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) {
        if (bytes(value).length < 32) {
            return toShortString(value);
        } else {
            StorageSlot.getStringSlot(store).value = value;
            return ShortString.wrap(_FALLBACK_SENTINEL);
        }
    }

    /**
     * @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}.
     */
    function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) {
        if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) {
            return toString(value);
        } else {
            return store;
        }
    }

    /**
     * @dev Return the length of a string that was encoded to `ShortString` or written to storage using {setWithFallback}.
     *
     * WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of
     * actual characters as the UTF-8 encoding of a single character can span over multiple bytes.
     */
    function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) {
        if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) {
            return byteLength(value);
        } else {
            return bytes(store).length;
        }
    }
}

File 23 of 30 : IERC5267.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC5267.sol)

pragma solidity ^0.8.0;

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
        );
}

File 24 of 30 : Pausable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

File 25 of 30 : IGuardians.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

interface IGuardians {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Emit an event when owner adds a new guardian address.
     *
     * @param guardian Address of the added guardian.
     */
    event Add(address indexed guardian);

    /**
     * @dev Emit an event when owner removes a guardian address.
     *
     * @param guardian Address of the removed guardian.
     */
    event Remove(address indexed guardian);

    /*//////////////////////////////////////////////////////////////
                                 ERRORS
    //////////////////////////////////////////////////////////////*/

    /// @dev Revert if an unauthorized caller calls a protected function.
    error OnlyGuardian();

    /*//////////////////////////////////////////////////////////////
                         PERMISSIONED FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Add an address as a guardian. Only callable by owner.
     *
     * @param guardian Address of the guardian.
     */
    function addGuardian(address guardian) external;

    /**
     * @notice Remove a guardian. Only callable by owner.
     *
     * @param guardian Address of the guardian.
     */
    function removeGuardian(address guardian) external;

    /**
     * @notice Pause the contract. Only callable by owner or a guardian.
     */
    function pause() external;

    /**
     * @notice Unpause the contract. Only callable by owner.
     */
    function unpause() external;
}

File 26 of 30 : IERC1271.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 *
 * _Available since v4.1._
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with _data
     */
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}

File 27 of 30 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

File 28 of 30 : StorageSlot.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 StorageSlot {
    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 29 of 30 : Math.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File 30 of 30 : SignedMath.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

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

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

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

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

Settings
{
  "remappings": [
    "solmate/=lib/solmate/",
    "openzeppelin/=lib/openzeppelin-contracts/",
    "openzeppelin-latest/=lib/openzeppelin-latest/",
    "chainlink/=lib/chainlink-brownie-contracts/contracts/src/",
    "chainlink-brownie-contracts/=lib/chainlink-brownie-contracts/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-latest/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "halmos-cheatcodes/=lib/halmos-cheatcodes/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 100000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "libraries": {}
}

Contract Security Audit

Contract ABI

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IKeyRegistry.KeyState","name":"state","type":"uint8"},{"internalType":"uint256","name":"startIdx","type":"uint256"},{"internalType":"uint256","name":"batchSize","type":"uint256"}],"name":"keysOf","outputs":[{"internalType":"bytes[]","name":"page","type":"bytes[]"},{"internalType":"uint256","name":"nextIdx","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxKeysPerFid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"migrate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"migratedAt","outputs":[{"internalType":"uint40","name":"","type":"uint40"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"migrator","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"key","type":"bytes"}],"name":"remove","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"fidOwner","type":"address"},{"internalType":"bytes","name":"key","type":"bytes"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"sig","type":"bytes"}],"name":"removeFor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"guardian","type":"address"}],"name":"removeGuardian","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_idRegistry","type":"address"}],"name":"setIdRegistry","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_keyGateway","type":"address"}],"name":"setKeyGateway","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_maxKeysPerFid","type":"uint256"}],"name":"setMaxKeysPerFid","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_migrator","type":"address"}],"name":"setMigrator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"keyType","type":"uint32"},{"internalType":"uint8","name":"metadataType","type":"uint8"},{"internalType":"contract IMetadataValidator","name":"validator","type":"address"}],"name":"setValidator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"fid","type":"uint256"},{"internalType":"enum IKeyRegistry.KeyState","name":"state","type":"uint8"}],"name":"totalKeys","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"useNonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"keyType","type":"uint32"},{"internalType":"uint8","name":"metadataType","type":"uint8"}],"name":"validators","outputs":[{"internalType":"contract IMetadataValidator","name":"validator","type":"address"}],"stateMutability":"view","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000000000000fc6c5f01fc30151999387bb99a9f489b0000000000000000000000002d93c2f74b2c4697f9ea85d0450148aa45d4d5a2000000000000000000000000299707e127cc77de01b9fd968bc0ff475f3c634200000000000000000000000000000000000000000000000000000000000003e8

-----Decoded View---------------
Arg [0] : _idRegistry (address): 0x00000000Fc6c5F01Fc30151999387Bb99A9f489b
Arg [1] : _migrator (address): 0x2D93c2F74b2C4697f9ea85D0450148AA45D4D5a2
Arg [2] : _initialOwner (address): 0x299707E127CC77DE01b9Fd968Bc0ff475f3C6342
Arg [3] : _maxKeysPerFid (uint256): 1000

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000fc6c5f01fc30151999387bb99a9f489b
Arg [1] : 0000000000000000000000002d93c2f74b2c4697f9ea85d0450148aa45d4d5a2
Arg [2] : 000000000000000000000000299707e127cc77de01b9fd968bc0ff475f3c6342
Arg [3] : 00000000000000000000000000000000000000000000000000000000000003e8


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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.