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Contract

0xbfB532A5700dD799ab59672e9EB26364a14298c8

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Transaction Hash
Method
Block
From
To
Grant Role110155552025-03-06 6:04:0314 hrs ago1741241043IN
0xbfB532A5...4a14298c8
0 APE0.0013111425.42069
Grant Role110155142025-03-06 6:02:3114 hrs ago1741240951IN
0xbfB532A5...4a14298c8
0 APE0.0013111425.42069
Grant Role110154942025-03-06 6:02:1114 hrs ago1741240931IN
0xbfB532A5...4a14298c8
0 APE0.0013111425.42069
Grant Role109215532025-03-04 10:17:322 days ago1741083452IN
0xbfB532A5...4a14298c8
0 APE0.0013108625.42069
Deploy109212392025-03-04 10:04:352 days ago1741082675IN
0xbfB532A5...4a14298c8
0 APE0.0414463225.42069
Deploy109212382025-03-04 10:04:332 days ago1741082673IN
0xbfB532A5...4a14298c8
0 APE0.1304729125.42069
Deploy105645352025-02-25 11:07:449 days ago1740481664IN
0xbfB532A5...4a14298c8
0 APE0.0808736825.42069
Grant Role105644932025-02-25 11:06:199 days ago1740481579IN
0xbfB532A5...4a14298c8
0 APE0.0013111725.42069
Grant Role105644722025-02-25 11:05:489 days ago1740481548IN
0xbfB532A5...4a14298c8
0 APE0.0006852925.42069
Grant Role105581112025-02-25 7:31:269 days ago1740468686IN
0xbfB532A5...4a14298c8
0 APE0.0013014125.42069

Latest 3 internal transactions

Parent Transaction Hash Block From To
109212392025-03-04 10:04:352 days ago1741082675
0xbfB532A5...4a14298c8
 Contract Creation0 APE
109212382025-03-04 10:04:332 days ago1741082673
0xbfB532A5...4a14298c8
 Contract Creation0 APE
105645352025-02-25 11:07:449 days ago1740481664
0xbfB532A5...4a14298c8
 Contract Creation0 APE

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Contract Source Code Verified (Exact Match)

Contract Name:
AppHub

Compiler Version
v0.8.18+commit.87f61d96

Optimization Enabled:
Yes with 1 runs

Other Settings:
default evmVersion, Unlicense license

Contract Source Code (Solidity)

/**
 *Submitted for verification at apescan.io on 2025-02-25
*/

// SPDX-License-Identifier: MIT AND UNLICENSED
//
// OpenZeppelin and ERC-6956 are licensed under MIT
//   Note ERC-6956 is authored by us (authenticvision.com)
//
// All other contracts are UNLICENSED, visit metaanchor.io for licensing information
//
// Meta Anchor (TM), Authentic Vision (TM) and Digital Soul (TM) are Registered Trademarks 
// and will be denoted as MetaAnchor, AuthenticVision and DigitalSoul subsequently.

// Sources flattened with hardhat v2.12.6 https://hardhat.org

// File @openzeppelin/contracts/access/[email protected]


// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

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

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

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

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

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

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

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


// File @openzeppelin/contracts/utils/[email protected]


// 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 @openzeppelin/contracts/utils/introspection/[email protected]


// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @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);
}


// File @openzeppelin/contracts/utils/introspection/[email protected]


// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

/**
 * @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);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}


// File @openzeppelin/contracts/utils/math/[email protected]


// OpenZeppelin Contracts (last updated v4.8.0) (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) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 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 10, 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 * 8) < value ? 1 : 0);
        }
    }
}


// File @openzeppelin/contracts/utils/[email protected]


// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @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 `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);
    }
}


// File @openzeppelin/contracts/access/[email protected]


// OpenZeppelin Contracts (last updated v4.8.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;




/**
 * @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:
 *
 * ```
 * 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}:
 *
 * ```
 * 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.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    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 override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @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 override 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 override 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 override 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 `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @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 Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}


// File @openzeppelin/contracts/utils/introspection/[email protected]


// OpenZeppelin Contracts (last updated v4.8.2) (utils/introspection/ERC165Checker.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library used to query support of an interface declared via {IERC165}.
 *
 * Note that these functions return the actual result of the query: they do not
 * `revert` if an interface is not supported. It is up to the caller to decide
 * what to do in these cases.
 */
library ERC165Checker {
    // As per the EIP-165 spec, no interface should ever match 0xffffffff
    bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;

    /**
     * @dev Returns true if `account` supports the {IERC165} interface.
     */
    function supportsERC165(address account) internal view returns (bool) {
        // Any contract that implements ERC165 must explicitly indicate support of
        // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
        return
            supportsERC165InterfaceUnchecked(account, type(IERC165).interfaceId) &&
            !supportsERC165InterfaceUnchecked(account, _INTERFACE_ID_INVALID);
    }

    /**
     * @dev Returns true if `account` supports the interface defined by
     * `interfaceId`. Support for {IERC165} itself is queried automatically.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
        // query support of both ERC165 as per the spec and support of _interfaceId
        return supportsERC165(account) && supportsERC165InterfaceUnchecked(account, interfaceId);
    }

    /**
     * @dev Returns a boolean array where each value corresponds to the
     * interfaces passed in and whether they're supported or not. This allows
     * you to batch check interfaces for a contract where your expectation
     * is that some interfaces may not be supported.
     *
     * See {IERC165-supportsInterface}.
     *
     * _Available since v3.4._
     */
    function getSupportedInterfaces(address account, bytes4[] memory interfaceIds)
        internal
        view
        returns (bool[] memory)
    {
        // an array of booleans corresponding to interfaceIds and whether they're supported or not
        bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length);

        // query support of ERC165 itself
        if (supportsERC165(account)) {
            // query support of each interface in interfaceIds
            for (uint256 i = 0; i < interfaceIds.length; i++) {
                interfaceIdsSupported[i] = supportsERC165InterfaceUnchecked(account, interfaceIds[i]);
            }
        }

        return interfaceIdsSupported;
    }

    /**
     * @dev Returns true if `account` supports all the interfaces defined in
     * `interfaceIds`. Support for {IERC165} itself is queried automatically.
     *
     * Batch-querying can lead to gas savings by skipping repeated checks for
     * {IERC165} support.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
        // query support of ERC165 itself
        if (!supportsERC165(account)) {
            return false;
        }

        // query support of each interface in interfaceIds
        for (uint256 i = 0; i < interfaceIds.length; i++) {
            if (!supportsERC165InterfaceUnchecked(account, interfaceIds[i])) {
                return false;
            }
        }

        // all interfaces supported
        return true;
    }

    /**
     * @notice Query if a contract implements an interface, does not check ERC165 support
     * @param account The address of the contract to query for support of an interface
     * @param interfaceId The interface identifier, as specified in ERC-165
     * @return true if the contract at account indicates support of the interface with
     * identifier interfaceId, false otherwise
     * @dev Assumes that account contains a contract that supports ERC165, otherwise
     * the behavior of this method is undefined. This precondition can be checked
     * with {supportsERC165}.
     *
     * Some precompiled contracts will falsely indicate support for a given interface, so caution
     * should be exercised when using this function.
     *
     * Interface identification is specified in ERC-165.
     */
    function supportsERC165InterfaceUnchecked(address account, bytes4 interfaceId) internal view returns (bool) {
        // prepare call
        bytes memory encodedParams = abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId);

        // perform static call
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly {
            success := staticcall(30000, account, add(encodedParams, 0x20), mload(encodedParams), 0x00, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0x00)
        }

        return success && returnSize >= 0x20 && returnValue > 0;
    }
}


// File contracts/DeployerContract.sol


pragma solidity ^0.8.18;

/**
 * @title Interface for contracts featuring cascade-verification of the deployment origination
 * @author [email protected] 
 * @notice Allows cascade-verification of a deployment origination across multiple DeployerContracts
 * @dev Contracts implementing this interface must take as the first constructor-parameter the address of the
 * `DeployerContract`
 */
interface IDeployedContract {
    /**
     * @notice Indicates whether addr has been directly or indirectly deployed by this contract
     * @dev Indirect deployment means e.g. by deploying through a contract that has been deployed by this contract
     * 
     * @param addr Address of the deployed contract requesting initArgs
     * @return hasDeployedAddr abi-encoded init args
     */
    function hasDeployed(address addr) external view returns (bool hasDeployedAddr);

    /**
     * Returns the deployer of a particular contract. Can be EOA or Contract Account 
     */
    function deployedBy() external view returns (address deployer);
}

/**
 * @title Predictable-Deployment contract of origin-verifyable contracts
 * @author [email protected]
 * @notice Deploys contracts implementing IDeployedContract based on passed bytecode and constructorArgs and allows to trace their origin
 * across multiple Deployercontracts
 * 
 * @dev Has a static deployment salt, which shall only be changed in absolute emergencies.
 * The root contract is typically deployed by the Nonce=0 of an account on different blockchains.
 * This ensures that all contracts can be cascade-verified to originate from one well-known and trusted
 * source, e.g. an AppHub for a company. 
 * 
 */
abstract contract DeployerContract is IDeployedContract {
    mapping (address => address) private _deployedContractsWithOperator;
    IDeployedContract[] public deployedContracts;

    address public deployedBy;
    bytes32 private _salt;

    /**
     * @notice Emits when a contract is deployed through `deploy()`
     * @param deployedAddress Address of the just deployed contract
     * @param operator The operator initiating the deployment
     */
    event ContractDeployed(address deployedAddress, address operator);

    /**
     * @notice Emits (in emergencies), when salt is updated.
     * @param newSalt The new salt used for new deployments
     * @param oldSalt The old salt, has been used for previous deployments
     * @param maintainer Initiator of the salt update
     */
    event DeploymentSaltUpdate(bytes32 newSalt, bytes32 oldSalt, address maintainer);

    /**
     * @notice Indicates whether `addr` can use the `deploy()` function.
     * @dev To be overwritten by extending contracts, typically by only authorizing a specific role.
     * @param addr The address in question
     */
    function canDeploy(address addr) public virtual returns (bool);

    modifier onlyDeployer() {
        require(canDeploy(msg.sender), "msg.sender must be deployer");
        _;
    }

    /**
     * Returns the predicted address (with the current `_salt`) for a provided bytecode and constructorArgs
     * @param bytecode The bytecode to be deployed
     * @param constructorArgs abi-encoded constructor args, accepted by the constructor of the contract in bytecode
     */
    function getAddress(
        bytes memory bytecode,
        bytes memory constructorArgs
    ) public view returns (address) {
        uint actualSalt = uint(_salt);
        bytes32 hash = keccak256(
            abi.encodePacked(bytes1(0xff), address(this), actualSalt, keccak256(_assembleByteCodeAndArgs(bytecode, constructorArgs)))
        );

        // NOTE: cast last 20 bytes of hash to address
        return address(uint160(uint(hash)));
    }

    /**
     * @notice Like `getAddress(bytes,bytes)`, but for constructors not taking additional arguments (additional to deployer address)
     * @param bytecode Bytecode to be deployed
     */
    function getAddress(
        bytes memory bytecode
    ) public view returns (address) {
        return getAddress(bytecode, abi.encode(address(this)));
    }

    /**
     * @notice Indicates whether a contract at `addr` directly or indirectly has been deployed through this contract
     * @param addr Address of the contract in question
     * @dev This function is typically cascade-called from parent DeployerContracts
     */
    function hasDeployed(address addr) public view returns (bool hasDeployedAddr) {
        if(_deployedContractsWithOperator[addr] != address(0)) {
            return true;
        }

        for(uint i=0; i<deployedContracts.length; i++) {
            if(deployedContracts[i].hasDeployed(addr)) {
                return true;
            }
        }

        return false;
    }

    /**
     * @dev Internhal helper to pack bytecode and constructor args. Ensurs the first constructor argument is the deployer, i.e. address(this)
     * @param byteCode Bytecode excl constructor args
     * @param constructorArgs ABI-encoded, expected to have the address of this contract encoded as first argument
     */
    function _assembleByteCodeAndArgs(bytes memory byteCode, bytes memory constructorArgs) internal view returns (bytes memory bytecodeWithArgs) {
        (address deployerAddress) = abi.decode(constructorArgs, (address));
        require(deployerAddress == address(this), "First constructor arg must be address of this contract");
        return abi.encodePacked(byteCode, constructorArgs);
    }
    
    /**
     * @notice Deploys bytecode of IDeployedContract-implementing contract with constructor args
     * @param byteCode Bytecode of contract implementing IDeployedContract
     * @param constructorArgs ABI-encoded constructor args, first argument must be address of this contract
     * @dev Emits ContractDeployed
     *      Throws if bytecode does not implement IDeployedContract
     *      Throws if `deployedBy()` of the deployed contract does not indicate this contract as deployer, 
     *      hence `hasDeployed()` mechanism would fail
     */
    function deploy(bytes memory byteCode, bytes memory constructorArgs) public onlyDeployer() {
        // verify first argument of constructorArgs is address(this)
        address addr = _deployBinary(_assembleByteCodeAndArgs(byteCode, constructorArgs), _salt);

        // verify the contract implements IDeployedContract
        require(ERC165Checker.supportsInterface(addr, type(IDeployedContract).interfaceId), "Can only deploy contracts implementing IDeployedContract interface");

        // verify contract claims this contract as deployer
        require(IDeployedContract(addr).deployedBy() == address(this), "Deployed contract must return this contract in getDeployer()");

        emit ContractDeployed(addr, msg.sender);
        _deployedContractsWithOperator[addr] = msg.sender;
        deployedContracts.push(IDeployedContract(addr));
    }

    /**
     * @notice Like deploy(bytes,bytes), but adds address(this) as only constructor argument
     * @param byteCode Bytecode of contract implementing IDeployedContract
     */
    function deploy(bytes memory byteCode) public onlyDeployer() {
        deploy(byteCode, abi.encode(address(this)));        
    }
         
    /**
     * @notice Updates the deployment salt - do only use in absolut emergencies!
     * @dev This shall not be used at all and is just for emergencies and major fuckups. As soon 
     * as the salt is updated, it can happen that the same contract / same version / same constructorArgs
     * can be re-deployed to a different address. 
     */
    function updateDeploymentSalt(bytes32 newSalt) public onlyDeployer()  {
        emit DeploymentSaltUpdate(_salt, newSalt, msg.sender);
        _salt = newSalt;
    }

    /**
     * @param bytecode Bytecode + packed constructorArgs of contract implementing IDeployedContract
     * @param salt The deployment salt.
     * @dev Isolated function to actually deploy contracts (can be used by extending contracts)
     *      inspired by https://solidity-by-example.org/app/create2/
     *      Salt is taken as parameter to also allow deploying contracts with an "old" salt in case of
     *      emergency salt-upgrade.
     */
    function _deployBinary(bytes memory bytecode, bytes32 salt) internal virtual onlyDeployer() returns (address) {
        address addr;

        uint actualSalt = uint(salt);
        /*
        NOTE: How to call create2

        create2(v, p, n, s)
        create new contract with code at memory p to p + n
        and send v wei
        and return the new address
        where new address = first 20 bytes of keccak256(0xff + address(this) + s + keccak256(mem[p…(p+n)))
              s = big-endian 256-bit value
        */
        assembly {
            addr := create2(
                callvalue(), // wei sent with current call
                // Actual code starts after skipping the first 32 bytes
                add(bytecode, 0x20),
                mload(bytecode), // Load the size of code contained in the first 32 bytes
                actualSalt // Salt from function arguments
            )

            if iszero(extcodesize(addr)) {
                revert(0, 0)
            }
        }

        return addr;
    }

    constructor() {
        deployedBy = msg.sender;
    }
}


// File contracts/AppHub.sol


pragma solidity ^0.8.18;
/**
 * @title AuthenticVision MetaAnchor AppHub
 * @author [email protected]
 * @notice Used to manage roles and verify a deployed contract originates directly or indirectly from this AppHub.
 * @dev This can be seen as the "AuthenticVision root certificate". All contracts deployed by Authentic Vision
 *      will have `hasDeployed(address)==true`. Only these contracts originate from Authentic Vision.
 *      
 *      This AppHub will be deployed at the same address in all Blockchains we support. 
 * 
 *      Visit authenticvision.com for contact and further information
 */
contract AppHub is AccessControl, DeployerContract {

  /**
   * @notice DEPLOYER_ROLE can deploy new MetaAnchor-Contracts from MetaAnchorFactory
   * @return Role hash, as should be passed to hasRole(), grantRole()
   */
  bytes32 public constant DEPLOYER_ROLE = keccak256("DEPLOYER_ROLE");
  
  /**
   * @notice FACTORY_DEPLOYER_ROLE can deploy factories (via AppHub)
   */
  bytes32 public constant FACTORY_DEPLOYER_ROLE = keccak256("FACTORY_DEPLOYER_ROLE");

  /**
   * @notice FACTORY_MAINTAINER_ROLE can maintain factories, e.g. add providers, remove registrations, ..
   */
  bytes32 public constant FACTORY_MAINTAINER_ROLE = keccak256("FACTORY_MAINTAINER_ROLE");

  /**
   * @notice MAINTAINER_ROLE can maintain MetaAnchor-Contracts, e.g. updateValidAnchors(), configurations, owners, etc.
   */
  bytes32 public constant MAINTAINER_ROLE = keccak256("MAINTAINER_ROLE");

  /**
   * @notice Signatures for ORACLE_ROLE will be accepted for ERC-6956 attestations
   */
  bytes32 public constant ORACLE_ROLE = keccak256("ORACLE_ROLE");

  /**
   * @notice PAUSER_ROLE has permission to pause contracts
   */
  bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");

  /**
   * @notice REGISTRAR_ROLE can register (and unregister their own) contracts for deployment
   */
  bytes32 public constant REGISTRAR_ROLE = keccak256("REGISTRAR_ROLE");

  /**
   * @notice Overrides authorization functionality from `DeployerContract` to allow only FACTORY_DEPLOYER_ROLE accounts
   * @param addr Account address in equestion
   * @return addrIsDeployer true indicates this account can deploy contracts via `deploy()` method
   */
  function canDeploy(address addr) public view override(DeployerContract) returns (bool addrIsDeployer) {
    return hasRole(FACTORY_DEPLOYER_ROLE, addr);
  }  

  constructor() {
    _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
  }
}

Contract Security Audit

Contract ABI

API
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Swarm Source

ipfs://06b37aaca2c5d398b920d9a265ebca2afe0bae1b70c00243fb7b322a9034121d

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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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.