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

pragma solidity ^0.8.20;

import {IAccessControl} from "./IAccessControl.sol";
import {Context} from "../utils/Context.sol";
import {ERC165} from "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address account => bool) hasRole;
        bytes32 adminRole;
    }

    mapping(bytes32 role => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with an {AccessControlUnauthorizedAccount} error including the required role.
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual returns (bool) {
        return _roles[role].hasRole[account];
    }

    /**
     * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `_msgSender()`
     * is missing `role`. Overriding this function changes the behavior of the {onlyRole} modifier.
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `account`
     * is missing `role`.
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert AccessControlUnauthorizedAccount(account, role);
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `callerConfirmation`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address callerConfirmation) public virtual {
        if (callerConfirmation != _msgSender()) {
            revert AccessControlBadConfirmation();
        }

        _revokeRole(role, callerConfirmation);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Attempts to grant `role` to `account` and returns a boolean indicating if `role` was granted.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual returns (bool) {
        if (!hasRole(role, account)) {
            _roles[role].hasRole[account] = true;
            emit RoleGranted(role, account, _msgSender());
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Attempts to revoke `role` to `account` and returns a boolean indicating if `role` was revoked.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual returns (bool) {
        if (hasRole(role, account)) {
            _roles[role].hasRole[account] = false;
            emit RoleRevoked(role, account, _msgSender());
            return true;
        } else {
            return false;
        }
    }
}

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

pragma solidity ^0.8.20;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedInnerCall();

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {FailedInnerCall} error.
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert AddressInsufficientBalance(address(this));
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

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

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

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
     * unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {FailedInnerCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// A representation of an empty/uninitialized UID.
bytes32 constant EMPTY_UID = 0;

// A zero expiration represents an non-expiring attestation.
uint64 constant NO_EXPIRATION_TIME = 0;

error AccessDenied();
error DeadlineExpired();
error InvalidEAS();
error InvalidLength();
error InvalidSignature();
error NotFound();

/// @notice A struct representing ECDSA signature data.
struct Signature {
    uint8 v; // The recovery ID.
    bytes32 r; // The x-coordinate of the nonce R.
    bytes32 s; // The signature data.
}

/// @notice A struct representing a single attestation.
struct Attestation {
    bytes32 uid; // A unique identifier of the attestation.
    bytes32 schema; // The unique identifier of the schema.
    uint64 time; // The time when the attestation was created (Unix timestamp).
    uint64 expirationTime; // The time when the attestation expires (Unix timestamp).
    uint64 revocationTime; // The time when the attestation was revoked (Unix timestamp).
    bytes32 refUID; // The UID of the related attestation.
    address recipient; // The recipient of the attestation.
    address attester; // The attester/sender of the attestation.
    bool revocable; // Whether the attestation is revocable.
    bytes data; // Custom attestation data.
}

/// @notice A helper function to work with unchecked iterators in loops.
function uncheckedInc(uint256 i) pure returns (uint256 j) {
    unchecked {
        j = i + 1;
    }
}

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

pragma solidity ^0.8.20;

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/ERC165.sol)

pragma solidity ^0.8.20;

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

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.8.26;

// External Libraries
import {SchemaResolver} from "@ethereum-attestation-service/eas-contracts/contracts/resolver/SchemaResolver.sol";
import {IEAS, Attestation} from "@ethereum-attestation-service/eas-contracts/contracts/IEAS.sol";
import {AccessControl} from "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
/**
 * @title GitcoinGrantsResolver
 * @notice A schema resolver that facilitates attestation resolution for the Gitcoin Attestation Network.
 * @dev The contract uses AccessControl for managing roles of valid delegators and delegator managers.
 */
contract GitcoinGrantsResolver is SchemaResolver, AccessControl {
    using Address for address payable;
    using SafeERC20 for IERC20;
    // ===============
    // === Errors ====
    // ===============

    error UnauthorizedAttester();
    error NotDelegatorsManager();
    error NotAdmin();
    error ZeroAddress();

    // ==================
    // === Constants ====
    // ==================

    /// @notice Role for delegators
    bytes32 public constant DELEGATOR_ROLE = keccak256("DELEGATOR_ROLE");

    /// @notice Role for managing the delegators
    bytes32 public constant DELEGATORS_MANAGER_ROLE = keccak256("DELEGATORS_MANAGER_ROLE");

    /// @notice Address of the native token
    address public constant NATIVE = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    // ==================
    // === Variables ====
    // ==================

    address public treasury;

    // ==================
    // ===== Events =====
    // ==================

    /// @notice Emitted when the treasury address is updated.
    /// @param treasury The address of the treasury.
    event TreasuryUpdated(address indexed treasury);

    /// @notice Emitted when an attestation happens.
    /// @param uid Attesation ID.
    /// @param recipient The address of the recipient.
    /// @param fee The attestation fee.
    /// @param data The attestation data.
    /// @param refUID The reference attestation ID.
    event OnAttested(bytes32 indexed uid, address indexed recipient, uint256 fee, bytes data, bytes32 refUID);

    /// ====================================
    /// ========== Constructor =============
    /// ====================================

    /**
     * @dev Constructor to initialize the contract with essential parameters.
     * @param _eas The address of the EAS contract.
     * @param _admin The address of the contract admin (owner).
     * @param _manager The manager of the contract delegators.
     * @param _delegators The list of initial valid delegators.
     * @param _treasury The address of the treasury.
     */
    constructor(
        IEAS _eas,
        address _admin,
        address _manager,
        address[] memory _delegators,
        address _treasury
    ) SchemaResolver(_eas) {
        // Set the admin role to the provided admin address
        _grantRole(DEFAULT_ADMIN_ROLE, _admin);
        _grantRole(DELEGATORS_MANAGER_ROLE, _manager);

        // Assign the DELEGATOR_ROLE to initial delegators
        _addDelegators(_delegators);

        _updateTreasury(_treasury);
    }

    /// ====================================
    /// ======= External / Public ==========
    /// ====================================

    /**
     * @dev Handles attestation by validating the attester.
     * @param attestation The attestation data.
     * @return Boolean indicating the success of the attestation.
     */
    function onAttest(Attestation calldata attestation, uint256 value) internal override returns (bool) {
        if (!hasRole(DELEGATOR_ROLE, attestation.attester)) {
            revert UnauthorizedAttester();
        }

        (bool success, ) = treasury.call{value: value}("");
        require(success, "Fee transfer failed");

        emit OnAttested(attestation.uid, attestation.recipient, value, attestation.data, attestation.refUID);

        return true;
    }

    /**
     * @dev Checks if an attestation can be revoked.
     * @return Boolean indicating whether the attestation can be revoked.
     */
    function onRevoke(
        Attestation calldata, // attestation
        uint256 //value
    ) internal pure override returns (bool) {
        return false;
    }

    /**
     * @notice Indicates whether the contract is designed to handle incoming payments.
     * @return True, indicating that the contract can accept payments.
     */
    function isPayable() public pure override returns (bool) {
        return true;
    }

    /**
     * @notice Add delegators.
     * @param _delegators An array of addresses representing the delegators to be added.
     */
    function addDelegators(address[] memory _delegators) public {
        if (!hasRole(DELEGATORS_MANAGER_ROLE, msg.sender)) {
            revert NotDelegatorsManager();
        }

        _addDelegators(_delegators);
    }

    /**
     * @notice Remove delegators.
     * @param _delegators An array of addresses representing the delegators to be removed.
     */
    function removeDelegators(address[] memory _delegators) public {
        if (!hasRole(DELEGATORS_MANAGER_ROLE, msg.sender)) {
            revert NotDelegatorsManager();
        }

        uint256 length = _delegators.length;
        for (uint256 i = 0; i < length; i++) {
            _removeDelegator(_delegators[i]);
        }
    }

    /**
     * @notice Updates the treasury address.
     * @param _treasury The address of the treasury.
     */
    function updateTreasury(address _treasury) external {
        if (!hasRole(DEFAULT_ADMIN_ROLE, msg.sender)) {
            revert NotAdmin();
        }
        _updateTreasury(_treasury);
    }

    /**
     * @notice Withdraws the contract balance to the specified address.
     * @param _token The address to which the balance will be transferred.
     * @param _to The address to which the balance will be transferred.
     * @param _amount The amount to be transferred.
     */
    function withdraw(address _token, address _to, uint256 _amount) external {
        if (!hasRole(DEFAULT_ADMIN_ROLE, msg.sender)) {
            revert NotAdmin();
        }
        transferAmount(_token, _to, _amount);
    }

    /// ====================================
    /// ======= Internal / Private =========
    /// ====================================

    /**
     * @notice Transfer an amount of a token to an address
     * @param _token The token to transfer
     * @param _to The address to transfer to
     * @param _amount The amount to transfer
     */
    function transferAmount(address _token, address _to, uint256 _amount) internal {
        if (_token == NATIVE) {
            payable(_to).sendValue(_amount);
        } else {
            IERC20(_token).safeTransfer(_to, _amount);
        }
    }

    /**
     *
     * @notice Adds a list of valid delegators.
     * @dev Adds a list of valid delegators.
     * @param _delegators An array of addresses representing the delegators to be added.
     *
     */
    function _addDelegators(address[] memory _delegators) private {
        uint256 length = _delegators.length;
        for (uint256 i = 0; i < length; i++) {
            _addDelegator(_delegators[i]);
        }
    }

    /**
     *
     * @notice Updates the treasury address.
     * @param _treasury The address of the treasury.
     * @dev Updates the treasury address.
     *
     */
    function _updateTreasury(address _treasury) private {
        if (_treasury == address(0)) {
            revert ZeroAddress();
        }
        treasury = _treasury;
        emit TreasuryUpdated(treasury);
    }

    /**
     * @notice Adds a new valid delegator.
     * @param _delegator The address of the new valid delegator.
     */
    function _addDelegator(address _delegator) private {
        if (_delegator == address(0)) {
            revert ZeroAddress();
        }
        _grantRole(DELEGATOR_ROLE, _delegator);
    }

    /**
     * @notice Removes a delegator.
     * @param _delegator The address of the valid delegator to be removed.
     */
    function _removeDelegator(address _delegator) private {
        _revokeRole(DELEGATOR_ROLE, _delegator);
    }
}

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

pragma solidity ^0.8.20;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev The `account` is missing a role.
     */
    error AccessControlUnauthorizedAccount(address account, bytes32 neededRole);

    /**
     * @dev The caller of a function is not the expected one.
     *
     * NOTE: Don't confuse with {AccessControlUnauthorizedAccount}.
     */
    error AccessControlBadConfirmation();

    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `callerConfirmation`.
     */
    function renounceRole(bytes32 role, address callerConfirmation) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { ISchemaRegistry } from "./ISchemaRegistry.sol";
import { ISemver } from "./ISemver.sol";
import { Attestation, Signature } from "./Common.sol";

/// @notice A struct representing the arguments of the attestation request.
struct AttestationRequestData {
    address recipient; // The recipient of the attestation.
    uint64 expirationTime; // The time when the attestation expires (Unix timestamp).
    bool revocable; // Whether the attestation is revocable.
    bytes32 refUID; // The UID of the related attestation.
    bytes data; // Custom attestation data.
    uint256 value; // An explicit ETH amount to send to the resolver. This is important to prevent accidental user errors.
}

/// @notice A struct representing the full arguments of the attestation request.
struct AttestationRequest {
    bytes32 schema; // The unique identifier of the schema.
    AttestationRequestData data; // The arguments of the attestation request.
}

/// @notice A struct representing the full arguments of the full delegated attestation request.
struct DelegatedAttestationRequest {
    bytes32 schema; // The unique identifier of the schema.
    AttestationRequestData data; // The arguments of the attestation request.
    Signature signature; // The ECDSA signature data.
    address attester; // The attesting account.
    uint64 deadline; // The deadline of the signature/request.
}

/// @notice A struct representing the full arguments of the multi attestation request.
struct MultiAttestationRequest {
    bytes32 schema; // The unique identifier of the schema.
    AttestationRequestData[] data; // The arguments of the attestation request.
}

/// @notice A struct representing the full arguments of the delegated multi attestation request.
struct MultiDelegatedAttestationRequest {
    bytes32 schema; // The unique identifier of the schema.
    AttestationRequestData[] data; // The arguments of the attestation requests.
    Signature[] signatures; // The ECDSA signatures data. Please note that the signatures are assumed to be signed with increasing nonces.
    address attester; // The attesting account.
    uint64 deadline; // The deadline of the signature/request.
}

/// @notice A struct representing the arguments of the revocation request.
struct RevocationRequestData {
    bytes32 uid; // The UID of the attestation to revoke.
    uint256 value; // An explicit ETH amount to send to the resolver. This is important to prevent accidental user errors.
}

/// @notice A struct representing the full arguments of the revocation request.
struct RevocationRequest {
    bytes32 schema; // The unique identifier of the schema.
    RevocationRequestData data; // The arguments of the revocation request.
}

/// @notice A struct representing the arguments of the full delegated revocation request.
struct DelegatedRevocationRequest {
    bytes32 schema; // The unique identifier of the schema.
    RevocationRequestData data; // The arguments of the revocation request.
    Signature signature; // The ECDSA signature data.
    address revoker; // The revoking account.
    uint64 deadline; // The deadline of the signature/request.
}

/// @notice A struct representing the full arguments of the multi revocation request.
struct MultiRevocationRequest {
    bytes32 schema; // The unique identifier of the schema.
    RevocationRequestData[] data; // The arguments of the revocation request.
}

/// @notice A struct representing the full arguments of the delegated multi revocation request.
struct MultiDelegatedRevocationRequest {
    bytes32 schema; // The unique identifier of the schema.
    RevocationRequestData[] data; // The arguments of the revocation requests.
    Signature[] signatures; // The ECDSA signatures data. Please note that the signatures are assumed to be signed with increasing nonces.
    address revoker; // The revoking account.
    uint64 deadline; // The deadline of the signature/request.
}

/// @title IEAS
/// @notice EAS - Ethereum Attestation Service interface.
interface IEAS is ISemver {
    /// @notice Emitted when an attestation has been made.
    /// @param recipient The recipient of the attestation.
    /// @param attester The attesting account.
    /// @param uid The UID of the new attestation.
    /// @param schemaUID The UID of the schema.
    event Attested(address indexed recipient, address indexed attester, bytes32 uid, bytes32 indexed schemaUID);

    /// @notice Emitted when an attestation has been revoked.
    /// @param recipient The recipient of the attestation.
    /// @param attester The attesting account.
    /// @param schemaUID The UID of the schema.
    /// @param uid The UID the revoked attestation.
    event Revoked(address indexed recipient, address indexed attester, bytes32 uid, bytes32 indexed schemaUID);

    /// @notice Emitted when a data has been timestamped.
    /// @param data The data.
    /// @param timestamp The timestamp.
    event Timestamped(bytes32 indexed data, uint64 indexed timestamp);

    /// @notice Emitted when a data has been revoked.
    /// @param revoker The address of the revoker.
    /// @param data The data.
    /// @param timestamp The timestamp.
    event RevokedOffchain(address indexed revoker, bytes32 indexed data, uint64 indexed timestamp);

    /// @notice Returns the address of the global schema registry.
    /// @return The address of the global schema registry.
    function getSchemaRegistry() external view returns (ISchemaRegistry);

    /// @notice Attests to a specific schema.
    /// @param request The arguments of the attestation request.
    /// @return The UID of the new attestation.
    ///
    /// Example:
    ///     attest({
    ///         schema: "0facc36681cbe2456019c1b0d1e7bedd6d1d40f6f324bf3dd3a4cef2999200a0",
    ///         data: {
    ///             recipient: "0xdEADBeAFdeAdbEafdeadbeafDeAdbEAFdeadbeaf",
    ///             expirationTime: 0,
    ///             revocable: true,
    ///             refUID: "0x0000000000000000000000000000000000000000000000000000000000000000",
    ///             data: "0xF00D",
    ///             value: 0
    ///         }
    ///     })
    function attest(AttestationRequest calldata request) external payable returns (bytes32);

    /// @notice Attests to a specific schema via the provided ECDSA signature.
    /// @param delegatedRequest The arguments of the delegated attestation request.
    /// @return The UID of the new attestation.
    ///
    /// Example:
    ///     attestByDelegation({
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: {
    ///             recipient: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
    ///             expirationTime: 1673891048,
    ///             revocable: true,
    ///             refUID: '0x0000000000000000000000000000000000000000000000000000000000000000',
    ///             data: '0x1234',
    ///             value: 0
    ///         },
    ///         signature: {
    ///             v: 28,
    ///             r: '0x148c...b25b',
    ///             s: '0x5a72...be22'
    ///         },
    ///         attester: '0xc5E8740aD971409492b1A63Db8d83025e0Fc427e',
    ///         deadline: 1673891048
    ///     })
    function attestByDelegation(
        DelegatedAttestationRequest calldata delegatedRequest
    ) external payable returns (bytes32);

    /// @notice Attests to multiple schemas.
    /// @param multiRequests The arguments of the multi attestation requests. The requests should be grouped by distinct
    ///     schema ids to benefit from the best batching optimization.
    /// @return The UIDs of the new attestations.
    ///
    /// Example:
    ///     multiAttest([{
    ///         schema: '0x33e9094830a5cba5554d1954310e4fbed2ef5f859ec1404619adea4207f391fd',
    ///         data: [{
    ///             recipient: '0xdEADBeAFdeAdbEafdeadbeafDeAdbEAFdeadbeaf',
    ///             expirationTime: 1673891048,
    ///             revocable: true,
    ///             refUID: '0x0000000000000000000000000000000000000000000000000000000000000000',
    ///             data: '0x1234',
    ///             value: 1000
    ///         },
    ///         {
    ///             recipient: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
    ///             expirationTime: 0,
    ///             revocable: false,
    ///             refUID: '0x480df4a039efc31b11bfdf491b383ca138b6bde160988222a2a3509c02cee174',
    ///             data: '0x00',
    ///             value: 0
    ///         }],
    ///     },
    ///     {
    ///         schema: '0x5ac273ce41e3c8bfa383efe7c03e54c5f0bff29c9f11ef6ffa930fc84ca32425',
    ///         data: [{
    ///             recipient: '0xdEADBeAFdeAdbEafdeadbeafDeAdbEAFdeadbeaf',
    ///             expirationTime: 0,
    ///             revocable: true,
    ///             refUID: '0x75bf2ed8dca25a8190c50c52db136664de25b2449535839008ccfdab469b214f',
    ///             data: '0x12345678',
    ///             value: 0
    ///         },
    ///     }])
    function multiAttest(MultiAttestationRequest[] calldata multiRequests) external payable returns (bytes32[] memory);

    /// @notice Attests to multiple schemas using via provided ECDSA signatures.
    /// @param multiDelegatedRequests The arguments of the delegated multi attestation requests. The requests should be
    ///     grouped by distinct schema ids to benefit from the best batching optimization.
    /// @return The UIDs of the new attestations.
    ///
    /// Example:
    ///     multiAttestByDelegation([{
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: [{
    ///             recipient: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
    ///             expirationTime: 1673891048,
    ///             revocable: true,
    ///             refUID: '0x0000000000000000000000000000000000000000000000000000000000000000',
    ///             data: '0x1234',
    ///             value: 0
    ///         },
    ///         {
    ///             recipient: '0xdEADBeAFdeAdbEafdeadbeafDeAdbEAFdeadbeaf',
    ///             expirationTime: 0,
    ///             revocable: false,
    ///             refUID: '0x0000000000000000000000000000000000000000000000000000000000000000',
    ///             data: '0x00',
    ///             value: 0
    ///         }],
    ///         signatures: [{
    ///             v: 28,
    ///             r: '0x148c...b25b',
    ///             s: '0x5a72...be22'
    ///         },
    ///         {
    ///             v: 28,
    ///             r: '0x487s...67bb',
    ///             s: '0x12ad...2366'
    ///         }],
    ///         attester: '0x1D86495b2A7B524D747d2839b3C645Bed32e8CF4',
    ///         deadline: 1673891048
    ///     }])
    function multiAttestByDelegation(
        MultiDelegatedAttestationRequest[] calldata multiDelegatedRequests
    ) external payable returns (bytes32[] memory);

    /// @notice Revokes an existing attestation to a specific schema.
    /// @param request The arguments of the revocation request.
    ///
    /// Example:
    ///     revoke({
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: {
    ///             uid: '0x101032e487642ee04ee17049f99a70590c735b8614079fc9275f9dd57c00966d',
    ///             value: 0
    ///         }
    ///     })
    function revoke(RevocationRequest calldata request) external payable;

    /// @notice Revokes an existing attestation to a specific schema via the provided ECDSA signature.
    /// @param delegatedRequest The arguments of the delegated revocation request.
    ///
    /// Example:
    ///     revokeByDelegation({
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: {
    ///             uid: '0xcbbc12102578c642a0f7b34fe7111e41afa25683b6cd7b5a14caf90fa14d24ba',
    ///             value: 0
    ///         },
    ///         signature: {
    ///             v: 27,
    ///             r: '0xb593...7142',
    ///             s: '0x0f5b...2cce'
    ///         },
    ///         revoker: '0x244934dd3e31bE2c81f84ECf0b3E6329F5381992',
    ///         deadline: 1673891048
    ///     })
    function revokeByDelegation(DelegatedRevocationRequest calldata delegatedRequest) external payable;

    /// @notice Revokes existing attestations to multiple schemas.
    /// @param multiRequests The arguments of the multi revocation requests. The requests should be grouped by distinct
    ///     schema ids to benefit from the best batching optimization.
    ///
    /// Example:
    ///     multiRevoke([{
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: [{
    ///             uid: '0x211296a1ca0d7f9f2cfebf0daaa575bea9b20e968d81aef4e743d699c6ac4b25',
    ///             value: 1000
    ///         },
    ///         {
    ///             uid: '0xe160ac1bd3606a287b4d53d5d1d6da5895f65b4b4bab6d93aaf5046e48167ade',
    ///             value: 0
    ///         }],
    ///     },
    ///     {
    ///         schema: '0x5ac273ce41e3c8bfa383efe7c03e54c5f0bff29c9f11ef6ffa930fc84ca32425',
    ///         data: [{
    ///             uid: '0x053d42abce1fd7c8fcddfae21845ad34dae287b2c326220b03ba241bc5a8f019',
    ///             value: 0
    ///         },
    ///     }])
    function multiRevoke(MultiRevocationRequest[] calldata multiRequests) external payable;

    /// @notice Revokes existing attestations to multiple schemas via provided ECDSA signatures.
    /// @param multiDelegatedRequests The arguments of the delegated multi revocation attestation requests. The requests
    ///     should be grouped by distinct schema ids to benefit from the best batching optimization.
    ///
    /// Example:
    ///     multiRevokeByDelegation([{
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: [{
    ///             uid: '0x211296a1ca0d7f9f2cfebf0daaa575bea9b20e968d81aef4e743d699c6ac4b25',
    ///             value: 1000
    ///         },
    ///         {
    ///             uid: '0xe160ac1bd3606a287b4d53d5d1d6da5895f65b4b4bab6d93aaf5046e48167ade',
    ///             value: 0
    ///         }],
    ///         signatures: [{
    ///             v: 28,
    ///             r: '0x148c...b25b',
    ///             s: '0x5a72...be22'
    ///         },
    ///         {
    ///             v: 28,
    ///             r: '0x487s...67bb',
    ///             s: '0x12ad...2366'
    ///         }],
    ///         revoker: '0x244934dd3e31bE2c81f84ECf0b3E6329F5381992',
    ///         deadline: 1673891048
    ///     }])
    function multiRevokeByDelegation(
        MultiDelegatedRevocationRequest[] calldata multiDelegatedRequests
    ) external payable;

    /// @notice Timestamps the specified bytes32 data.
    /// @param data The data to timestamp.
    /// @return The timestamp the data was timestamped with.
    function timestamp(bytes32 data) external returns (uint64);

    /// @notice Timestamps the specified multiple bytes32 data.
    /// @param data The data to timestamp.
    /// @return The timestamp the data was timestamped with.
    function multiTimestamp(bytes32[] calldata data) external returns (uint64);

    /// @notice Revokes the specified bytes32 data.
    /// @param data The data to timestamp.
    /// @return The timestamp the data was revoked with.
    function revokeOffchain(bytes32 data) external returns (uint64);

    /// @notice Revokes the specified multiple bytes32 data.
    /// @param data The data to timestamp.
    /// @return The timestamp the data was revoked with.
    function multiRevokeOffchain(bytes32[] calldata data) external returns (uint64);

    /// @notice Returns an existing attestation by UID.
    /// @param uid The UID of the attestation to retrieve.
    /// @return The attestation data members.
    function getAttestation(bytes32 uid) external view returns (Attestation memory);

    /// @notice Checks whether an attestation exists.
    /// @param uid The UID of the attestation to retrieve.
    /// @return Whether an attestation exists.
    function isAttestationValid(bytes32 uid) external view returns (bool);

    /// @notice Returns the timestamp that the specified data was timestamped with.
    /// @param data The data to query.
    /// @return The timestamp the data was timestamped with.
    function getTimestamp(bytes32 data) external view returns (uint64);

    /// @notice Returns the timestamp that the specified data was timestamped with.
    /// @param data The data to query.
    /// @return The timestamp the data was timestamped with.
    function getRevokeOffchain(address revoker, bytes32 data) external view returns (uint64);
}

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

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

import { ISchemaResolver } from "./resolver/ISchemaResolver.sol";

/// @notice A struct representing a record for a submitted schema.
struct SchemaRecord {
    bytes32 uid; // The unique identifier of the schema.
    ISchemaResolver resolver; // Optional schema resolver.
    bool revocable; // Whether the schema allows revocations explicitly.
    string schema; // Custom specification of the schema (e.g., an ABI).
}

/// @title ISchemaRegistry
/// @notice The interface of global attestation schemas for the Ethereum Attestation Service protocol.
interface ISchemaRegistry is ISemver {
    /// @notice Emitted when a new schema has been registered
    /// @param uid The schema UID.
    /// @param registerer The address of the account used to register the schema.
    /// @param schema The schema data.
    event Registered(bytes32 indexed uid, address indexed registerer, SchemaRecord schema);

    /// @notice Submits and reserves a new schema
    /// @param schema The schema data schema.
    /// @param resolver An optional schema resolver.
    /// @param revocable Whether the schema allows revocations explicitly.
    /// @return The UID of the new schema.
    function register(string calldata schema, ISchemaResolver resolver, bool revocable) external returns (bytes32);

    /// @notice Returns an existing schema by UID
    /// @param uid The UID of the schema to retrieve.
    /// @return The schema data members.
    function getSchema(bytes32 uid) external view returns (SchemaRecord memory);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { ISemver } from "../ISemver.sol";
import { Attestation } from "../Common.sol";

/// @title ISchemaResolver
/// @notice The interface of an optional schema resolver.
interface ISchemaResolver is ISemver {
    /// @notice Checks if the resolver can be sent ETH.
    /// @return Whether the resolver supports ETH transfers.
    function isPayable() external pure returns (bool);

    /// @notice Processes an attestation and verifies whether it's valid.
    /// @param attestation The new attestation.
    /// @return Whether the attestation is valid.
    function attest(Attestation calldata attestation) external payable returns (bool);

    /// @notice Processes multiple attestations and verifies whether they are valid.
    /// @param attestations The new attestations.
    /// @param values Explicit ETH amounts which were sent with each attestation.
    /// @return Whether all the attestations are valid.
    function multiAttest(
        Attestation[] calldata attestations,
        uint256[] calldata values
    ) external payable returns (bool);

    /// @notice Processes an attestation revocation and verifies if it can be revoked.
    /// @param attestation The existing attestation to be revoked.
    /// @return Whether the attestation can be revoked.
    function revoke(Attestation calldata attestation) external payable returns (bool);

    /// @notice Processes revocation of multiple attestation and verifies they can be revoked.
    /// @param attestations The existing attestations to be revoked.
    /// @param values Explicit ETH amounts which were sent with each revocation.
    /// @return Whether the attestations can be revoked.
    function multiRevoke(
        Attestation[] calldata attestations,
        uint256[] calldata values
    ) external payable returns (bool);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title ISemver
/// @notice A semver interface.
interface ISemver {
    /// @notice Returns the full semver contract version.
    /// @return Semver contract version as a string.
    function version() external view returns (string memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Muldiv operation overflow.
     */
    error MathOverflowedMulDiv();

    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @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 towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            return a / b;
        }

        // (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 = x * y; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                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.
            if (denominator <= prod1) {
                revert MathOverflowedMulDiv();
            }

            ///////////////////////////////////////////////
            // 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.

            uint256 twos = denominator & (0 - denominator);
            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 (unsignedRoundsUp(rounding) && 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
     * towards zero.
     *
     * 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 + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * 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 + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
        }
    }

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

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

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 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 + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC20Permit} from "../extensions/IERC20Permit.sol";
import {Address} from "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev An operation with an ERC20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data);
        if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import { IEAS, Attestation } from "../IEAS.sol";
import { AccessDenied, InvalidEAS, InvalidLength, uncheckedInc } from "../Common.sol";
import { Semver } from "../Semver.sol";

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

/// @title SchemaResolver
/// @notice The base schema resolver contract.
abstract contract SchemaResolver is ISchemaResolver, Semver {
    error InsufficientValue();
    error NotPayable();

    // The global EAS contract.
    IEAS internal immutable _eas;

    /// @dev Creates a new resolver.
    /// @param eas The address of the global EAS contract.
    constructor(IEAS eas) Semver(1, 3, 0) {
        if (address(eas) == address(0)) {
            revert InvalidEAS();
        }

        _eas = eas;
    }

    /// @dev Ensures that only the EAS contract can make this call.
    modifier onlyEAS() {
        _onlyEAS();

        _;
    }

    /// @inheritdoc ISchemaResolver
    function isPayable() public pure virtual returns (bool) {
        return false;
    }

    /// @dev ETH callback.
    receive() external payable virtual {
        if (!isPayable()) {
            revert NotPayable();
        }
    }

    /// @inheritdoc ISchemaResolver
    function attest(Attestation calldata attestation) external payable onlyEAS returns (bool) {
        return onAttest(attestation, msg.value);
    }

    /// @inheritdoc ISchemaResolver
    function multiAttest(
        Attestation[] calldata attestations,
        uint256[] calldata values
    ) external payable onlyEAS returns (bool) {
        uint256 length = attestations.length;
        if (length != values.length) {
            revert InvalidLength();
        }

        // We are keeping track of the remaining ETH amount that can be sent to resolvers and will keep deducting
        // from it to verify that there isn't any attempt to send too much ETH to resolvers. Please note that unless
        // some ETH was stuck in the contract by accident (which shouldn't happen in normal conditions), it won't be
        // possible to send too much ETH anyway.
        uint256 remainingValue = msg.value;

        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            // Ensure that the attester/revoker doesn't try to spend more than available.
            uint256 value = values[i];
            if (value > remainingValue) {
                revert InsufficientValue();
            }

            // Forward the attestation to the underlying resolver and return false in case it isn't approved.
            if (!onAttest(attestations[i], value)) {
                return false;
            }

            unchecked {
                // Subtract the ETH amount, that was provided to this attestation, from the global remaining ETH amount.
                remainingValue -= value;
            }
        }

        return true;
    }

    /// @inheritdoc ISchemaResolver
    function revoke(Attestation calldata attestation) external payable onlyEAS returns (bool) {
        return onRevoke(attestation, msg.value);
    }

    /// @inheritdoc ISchemaResolver
    function multiRevoke(
        Attestation[] calldata attestations,
        uint256[] calldata values
    ) external payable onlyEAS returns (bool) {
        uint256 length = attestations.length;
        if (length != values.length) {
            revert InvalidLength();
        }

        // We are keeping track of the remaining ETH amount that can be sent to resolvers and will keep deducting
        // from it to verify that there isn't any attempt to send too much ETH to resolvers. Please note that unless
        // some ETH was stuck in the contract by accident (which shouldn't happen in normal conditions), it won't be
        // possible to send too much ETH anyway.
        uint256 remainingValue = msg.value;

        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            // Ensure that the attester/revoker doesn't try to spend more than available.
            uint256 value = values[i];
            if (value > remainingValue) {
                revert InsufficientValue();
            }

            // Forward the revocation to the underlying resolver and return false in case it isn't approved.
            if (!onRevoke(attestations[i], value)) {
                return false;
            }

            unchecked {
                // Subtract the ETH amount, that was provided to this attestation, from the global remaining ETH amount.
                remainingValue -= value;
            }
        }

        return true;
    }

    /// @notice A resolver callback that should be implemented by child contracts.
    /// @param attestation The new attestation.
    /// @param value An explicit ETH amount that was sent to the resolver. Please note that this value is verified in
    ///     both attest() and multiAttest() callbacks EAS-only callbacks and that in case of multi attestations, it'll
    ///     usually hold that msg.value != value, since msg.value aggregated the sent ETH amounts for all the
    ///     attestations in the batch.
    /// @return Whether the attestation is valid.
    function onAttest(Attestation calldata attestation, uint256 value) internal virtual returns (bool);

    /// @notice Processes an attestation revocation and verifies if it can be revoked.
    /// @param attestation The existing attestation to be revoked.
    /// @param value An explicit ETH amount that was sent to the resolver. Please note that this value is verified in
    ///     both revoke() and multiRevoke() callbacks EAS-only callbacks and that in case of multi attestations, it'll
    ///     usually hold that msg.value != value, since msg.value aggregated the sent ETH amounts for all the
    ///     attestations in the batch.
    /// @return Whether the attestation can be revoked.
    function onRevoke(Attestation calldata attestation, uint256 value) internal virtual returns (bool);

    /// @dev Ensures that only the EAS contract can make this call.
    function _onlyEAS() private view {
        if (msg.sender != address(_eas)) {
            revert AccessDenied();
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";

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

/// @title Semver
/// @notice A simple contract for managing contract versions.
contract Semver is ISemver {
    // Contract's major version number.
    uint256 private immutable _major;

    // Contract's minor version number.
    uint256 private immutable _minor;

    // Contract's patch version number.
    uint256 private immutable _patch;

    /// @dev Create a new Semver instance.
    /// @param major Major version number.
    /// @param minor Minor version number.
    /// @param patch Patch version number.
    constructor(uint256 major, uint256 minor, uint256 patch) {
        _major = major;
        _minor = minor;
        _patch = patch;
    }

    /// @notice Returns the full semver contract version.
    /// @return Semver contract version as a string.
    function version() external view returns (string memory) {
        return
            string(
                abi.encodePacked(Strings.toString(_major), ".", Strings.toString(_minor), ".", Strings.toString(_patch))
            );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.20;

/**
 * @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);
        }
    }
}

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

pragma solidity ^0.8.20;

import {Math} from "./math/Math.sol";
import {SignedMath} from "./math/SignedMath.sol";

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

    /**
     * @dev The `value` string doesn't fit in the specified `length`.
     */
    error StringsInsufficientHexLength(uint256 value, uint256 length);

    /**
     * @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), HEX_DIGITS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

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

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

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

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

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

{
  "compilationTarget": {
    "contracts/GitcoinGrantsResolver.sol": "GitcoinGrantsResolver"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}