Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.8.30+commit.73712a01.js&optimize=false&runs=200&gist=

.deps...npm...@openzeppelin...contracts-upgradeable...access...AccessControlUpgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (access/AccessControl.sol)

pragma solidity ^0.8.20;

import {IAccessControl} from "@openzeppelin/contracts/access/IAccessControl.sol";
import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import {ERC165Upgradeable} from "../utils/introspection/ERC165Upgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControl, ERC165Upgradeable {
    struct RoleData {
        mapping(address account => bool) hasRole;
        bytes32 adminRole;
    }

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;


    /// @custom:storage-location erc7201:openzeppelin.storage.AccessControl
    struct AccessControlStorage {
        mapping(bytes32 role => RoleData) _roles;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.AccessControl")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant AccessControlStorageLocation = 0x02dd7bc7dec4dceedda775e58dd541e08a116c6c53815c0bd028192f7b626800;

    function _getAccessControlStorage() private pure returns (AccessControlStorage storage $) {
        assembly {
            $.slot := AccessControlStorageLocation
        }
    }

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

    function __AccessControl_init() internal onlyInitializing {
    }

    function __AccessControl_init_unchained() internal onlyInitializing {
    }
    /// @inheritdoc IERC165
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

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

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

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

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

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

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

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

        _revokeRole(role, callerConfirmation);
    }

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

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

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

.deps...npm...@openzeppelin...contracts-upgradeable...proxy...utils...Initializable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.20;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Storage of the initializable contract.
     *
     * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
     * when using with upgradeable contracts.
     *
     * @custom:storage-location erc7201:openzeppelin.storage.Initializable
     */
    struct InitializableStorage {
        /**
         * @dev Indicates that the contract has been initialized.
         */
        uint64 _initialized;
        /**
         * @dev Indicates that the contract is in the process of being initialized.
         */
        bool _initializing;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;

    /**
     * @dev The contract is already initialized.
     */
    error InvalidInitialization();

    /**
     * @dev The contract is not initializing.
     */
    error NotInitializing();

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint64 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any
     * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
     * production.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        // Cache values to avoid duplicated sloads
        bool isTopLevelCall = !$._initializing;
        uint64 initialized = $._initialized;

        // Allowed calls:
        // - initialSetup: the contract is not in the initializing state and no previous version was
        //                 initialized
        // - construction: the contract is initialized at version 1 (no reinitialization) and the
        //                 current contract is just being deployed
        bool initialSetup = initialized == 0 && isTopLevelCall;
        bool construction = initialized == 1 && address(this).code.length == 0;

        if (!initialSetup && !construction) {
            revert InvalidInitialization();
        }
        $._initialized = 1;
        if (isTopLevelCall) {
            $._initializing = true;
        }
        _;
        if (isTopLevelCall) {
            $._initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint64 version) {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing || $._initialized >= version) {
            revert InvalidInitialization();
        }
        $._initialized = version;
        $._initializing = true;
        _;
        $._initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        _checkInitializing();
        _;
    }

    /**
     * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
     */
    function _checkInitializing() internal view virtual {
        if (!_isInitializing()) {
            revert NotInitializing();
        }
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing) {
            revert InvalidInitialization();
        }
        if ($._initialized != type(uint64).max) {
            $._initialized = type(uint64).max;
            emit Initialized(type(uint64).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint64) {
        return _getInitializableStorage()._initialized;
    }

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

    /**
     * @dev Pointer to storage slot. Allows integrators to override it with a custom storage location.
     *
     * NOTE: Consider following the ERC-7201 formula to derive storage locations.
     */
    function _initializableStorageSlot() internal pure virtual returns (bytes32) {
        return INITIALIZABLE_STORAGE;
    }

    /**
     * @dev Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        bytes32 slot = _initializableStorageSlot();
        assembly {
            $.slot := slot
        }
    }
}

.deps...npm...@openzeppelin...contracts-upgradeable...proxy...utils...UUPSUpgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.22;

import {IERC1822Proxiable} from "@openzeppelin/contracts/interfaces/draft-IERC1822.sol";
import {ERC1967Utils} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Utils.sol";
import {Initializable} from "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822Proxiable {
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
    address private immutable __self = address(this);

    /**
     * @dev The version of the upgrade interface of the contract. If this getter is missing, both `upgradeTo(address)`
     * and `upgradeToAndCall(address,bytes)` are present, and `upgradeTo` must be used if no function should be called,
     * while `upgradeToAndCall` will invoke the `receive` function if the second argument is the empty byte string.
     * If the getter returns `"5.0.0"`, only `upgradeToAndCall(address,bytes)` is present, and the second argument must
     * be the empty byte string if no function should be called, making it impossible to invoke the `receive` function
     * during an upgrade.
     */
    string public constant UPGRADE_INTERFACE_VERSION = "5.0.0";

    /**
     * @dev The call is from an unauthorized context.
     */
    error UUPSUnauthorizedCallContext();

    /**
     * @dev The storage `slot` is unsupported as a UUID.
     */
    error UUPSUnsupportedProxiableUUID(bytes32 slot);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC-1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC-1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        _checkProxy();
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        _checkNotDelegated();
        _;
    }

    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Implementation of the ERC-1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual notDelegated returns (bytes32) {
        return ERC1967Utils.IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) public payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data);
    }

    /**
     * @dev Reverts if the execution is not performed via delegatecall or the execution
     * context is not of a proxy with an ERC-1967 compliant implementation pointing to self.
     */
    function _checkProxy() internal view virtual {
        if (
            address(this) == __self || // Must be called through delegatecall
            ERC1967Utils.getImplementation() != __self // Must be called through an active proxy
        ) {
            revert UUPSUnauthorizedCallContext();
        }
    }

    /**
     * @dev Reverts if the execution is performed via delegatecall.
     * See {notDelegated}.
     */
    function _checkNotDelegated() internal view virtual {
        if (address(this) != __self) {
            // Must not be called through delegatecall
            revert UUPSUnauthorizedCallContext();
        }
    }

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

    /**
     * @dev Performs an implementation upgrade with a security check for UUPS proxies, and additional setup call.
     *
     * As a security check, {proxiableUUID} is invoked in the new implementation, and the return value
     * is expected to be the implementation slot in ERC-1967.
     *
     * Emits an {IERC1967-Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data) private {
        try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
            if (slot != ERC1967Utils.IMPLEMENTATION_SLOT) {
                revert UUPSUnsupportedProxiableUUID(slot);
            }
            ERC1967Utils.upgradeToAndCall(newImplementation, data);
        } catch {
            // The implementation is not UUPS
            revert ERC1967Utils.ERC1967InvalidImplementation(newImplementation);
        }
    }
}

.deps...npm...@openzeppelin...contracts-upgradeable...utils...ContextUpgradeable.sol

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

pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";

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

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

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

.deps...npm...@openzeppelin...contracts-upgradeable...utils...introspection...ERC165Upgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/ERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC-165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 */
abstract contract ERC165Upgradeable is Initializable, IERC165 {
    function __ERC165_init() internal onlyInitializing {
    }

    function __ERC165_init_unchained() internal onlyInitializing {
    }
    /// @inheritdoc IERC165
    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

.deps...npm...@openzeppelin...contracts-upgradeable...utils...PausableUpgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;

import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Pausable
    struct PausableStorage {
        bool _paused;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Pausable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant PausableStorageLocation = 0xcd5ed15c6e187e77e9aee88184c21f4f2182ab5827cb3b7e07fbedcd63f03300;

    function _getPausableStorage() private pure returns (PausableStorage storage $) {
        assembly {
            $.slot := PausableStorageLocation
        }
    }

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

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

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

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

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

    function __Pausable_init() internal onlyInitializing {
    }

    function __Pausable_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        PausableStorage storage $ = _getPausableStorage();
        return $._paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

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

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

.deps...npm...@openzeppelin...contracts-upgradeable...utils...ReentrancyGuardUpgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuardUpgradeable is Initializable {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant NOT_ENTERED = 1;
    uint256 private constant ENTERED = 2;

    /// @custom:storage-location erc7201:openzeppelin.storage.ReentrancyGuard
    struct ReentrancyGuardStorage {
        uint256 _status;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant ReentrancyGuardStorageLocation = 0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00;

    function _getReentrancyGuardStorage() private pure returns (ReentrancyGuardStorage storage $) {
        assembly {
            $.slot := ReentrancyGuardStorageLocation
        }
    }

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        $._status = NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if ($._status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // Any calls to nonReentrant after this point will fail
        $._status = ENTERED;
    }

    function _nonReentrantAfter() private {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        $._status = NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        return $._status == ENTERED;
    }
}

.deps...npm...@openzeppelin...contracts...access...IAccessControl.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (access/IAccessControl.sol)

pragma solidity >=0.8.4;

/**
 * @dev External interface of AccessControl declared to support ERC-165 detection.
 */
interface IAccessControl {
    /**
     * @dev The `account` is missing a role.
     */
    error AccessControlUnauthorizedAccount(address account, bytes32 neededRole);

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

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

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call. This account bears the admin role (for the granted role).
     * Expected in cases where the role was granted using the internal {AccessControl-_grantRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

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

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

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

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

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

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

.deps...npm...@openzeppelin...contracts...interfaces...draft-IERC1822.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/draft-IERC1822.sol)

pragma solidity >=0.4.16;

/**
 * @dev ERC-1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822Proxiable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

.deps...npm...@openzeppelin...contracts...interfaces...IERC1363.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1363.sol)

pragma solidity >=0.6.2;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}

.deps...npm...@openzeppelin...contracts...interfaces...IERC165.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC165.sol)

pragma solidity >=0.4.16;

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

.deps...npm...@openzeppelin...contracts...interfaces...IERC1967.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1967.sol)

pragma solidity >=0.4.11;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 */
interface IERC1967 {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}

.deps...npm...@openzeppelin...contracts...interfaces...IERC20.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC20.sol)

pragma solidity >=0.4.16;

import {IERC20} from "../token/ERC20/IERC20.sol";

.deps...npm...@openzeppelin...contracts...proxy...beacon...IBeacon.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (proxy/beacon/IBeacon.sol)

pragma solidity >=0.4.16;

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

.deps...npm...@openzeppelin...contracts...proxy...ERC1967...ERC1967Utils.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (proxy/ERC1967/ERC1967Utils.sol)

pragma solidity ^0.8.21;

import {IBeacon} from "../beacon/IBeacon.sol";
import {IERC1967} from "../../interfaces/IERC1967.sol";
import {Address} from "../../utils/Address.sol";
import {StorageSlot} from "../../utils/StorageSlot.sol";

/**
 * @dev This library provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[ERC-1967] slots.
 */
library ERC1967Utils {
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev The `implementation` of the proxy is invalid.
     */
    error ERC1967InvalidImplementation(address implementation);

    /**
     * @dev The `admin` of the proxy is invalid.
     */
    error ERC1967InvalidAdmin(address admin);

    /**
     * @dev The `beacon` of the proxy is invalid.
     */
    error ERC1967InvalidBeacon(address beacon);

    /**
     * @dev An upgrade function sees `msg.value > 0` that may be lost.
     */
    error ERC1967NonPayable();

    /**
     * @dev Returns the current implementation address.
     */
    function getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the ERC-1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        if (newImplementation.code.length == 0) {
            revert ERC1967InvalidImplementation(newImplementation);
        }
        StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Performs implementation upgrade with additional setup call if data is nonempty.
     * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
     * to avoid stuck value in the contract.
     *
     * Emits an {IERC1967-Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) internal {
        _setImplementation(newImplementation);
        emit IERC1967.Upgraded(newImplementation);

        if (data.length > 0) {
            Address.functionDelegateCall(newImplementation, data);
        } else {
            _checkNonPayable();
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by ERC-1967) using
     * the https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the ERC-1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        if (newAdmin == address(0)) {
            revert ERC1967InvalidAdmin(address(0));
        }
        StorageSlot.getAddressSlot(ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {IERC1967-AdminChanged} event.
     */
    function changeAdmin(address newAdmin) internal {
        emit IERC1967.AdminChanged(getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is the keccak-256 hash of "eip1967.proxy.beacon" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the ERC-1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        if (newBeacon.code.length == 0) {
            revert ERC1967InvalidBeacon(newBeacon);
        }

        StorageSlot.getAddressSlot(BEACON_SLOT).value = newBeacon;

        address beaconImplementation = IBeacon(newBeacon).implementation();
        if (beaconImplementation.code.length == 0) {
            revert ERC1967InvalidImplementation(beaconImplementation);
        }
    }

    /**
     * @dev Change the beacon and trigger a setup call if data is nonempty.
     * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
     * to avoid stuck value in the contract.
     *
     * Emits an {IERC1967-BeaconUpgraded} event.
     *
     * CAUTION: Invoking this function has no effect on an instance of {BeaconProxy} since v5, since
     * it uses an immutable beacon without looking at the value of the ERC-1967 beacon slot for
     * efficiency.
     */
    function upgradeBeaconToAndCall(address newBeacon, bytes memory data) internal {
        _setBeacon(newBeacon);
        emit IERC1967.BeaconUpgraded(newBeacon);

        if (data.length > 0) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        } else {
            _checkNonPayable();
        }
    }

    /**
     * @dev Reverts if `msg.value` is not zero. It can be used to avoid `msg.value` stuck in the contract
     * if an upgrade doesn't perform an initialization call.
     */
    function _checkNonPayable() private {
        if (msg.value > 0) {
            revert ERC1967NonPayable();
        }
    }
}

.deps...npm...@openzeppelin...contracts...token...ERC20...IERC20.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
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);
}

.deps...npm...@openzeppelin...contracts...token...ERC20...utils...SafeERC20.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 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 {
    /**
     * @dev An operation with an ERC-20 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 Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(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.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    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.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    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.
     *
     * NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
     * only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
     * set here.
     */
    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 Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            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 {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            // bubble errors
            if iszero(success) {
                let ptr := mload(0x40)
                returndatacopy(ptr, 0, returndatasize())
                revert(ptr, returndatasize())
            }
            returnSize := returndatasize()
            returnValue := mload(0)
        }

        if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
            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 silently catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0)
        }
        return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
    }
}

[email protected]

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/Address.sol)

pragma solidity ^0.8.20;

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

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

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

        (bool success, bytes memory returndata) = recipient.call{value: amount}("");
        if (!success) {
            _revert(returndata);
        }
    }

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

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

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

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

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

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

    /**
     * @dev Reverts with returndata if present. Otherwise reverts with {Errors.FailedCall}.
     */
    function _revert(bytes memory returndata) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            assembly ("memory-safe") {
                revert(add(returndata, 0x20), mload(returndata))
            }
        } else {
            revert Errors.FailedCall();
        }
    }
}

[email protected]

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/Errors.sol)

pragma solidity ^0.8.20;

/**
 * @dev Collection of common custom errors used in multiple contracts
 *
 * IMPORTANT: Backwards compatibility is not guaranteed in future versions of the library.
 * It is recommended to avoid relying on the error API for critical functionality.
 *
 * _Available since v5.1._
 */
library Errors {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error InsufficientBalance(uint256 balance, uint256 needed);

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

    /**
     * @dev The deployment failed.
     */
    error FailedDeployment();

    /**
     * @dev A necessary precompile is missing.
     */
    error MissingPrecompile(address);
}

.deps...npm...@openzeppelin...contracts...utils...introspection...IERC165.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)

pragma solidity >=0.4.16;

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

.deps...npm...@openzeppelin...contracts...utils...StorageSlot.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.20;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC-1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     // Define the slot. Alternatively, use the SlotDerivation library to derive the slot.
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(newImplementation.code.length > 0);
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * TIP: Consider using this library along with {SlotDerivation}.
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct Int256Slot {
        int256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

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

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

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

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

    /**
     * @dev Returns a `Int256Slot` with member `value` located at `slot`.
     */
    function getInt256Slot(bytes32 slot) internal pure returns (Int256Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

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

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        assembly ("memory-safe") {
            r.slot := store.slot
        }
    }

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

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        assembly ("memory-safe") {
            r.slot := store.slot
        }
    }
}

.prettierrc.json

{
    "overrides": [
        {
            "files": "*.sol",
            "options": {
                "printWidth": 80,
                "tabWidth": 4,
                "useTabs": false,
                "singleQuote": false,
                "bracketSpacing": false
            }
        },
        {
            "files": "*.yml",
            "options": {}
        },
        {
            "files": "*.yaml",
            "options": {}
        },
        {
            "files": "*.toml",
            "options": {}
        },
        {
            "files": "*.json",
            "options": {}
        },
        {
            "files": "*.js",
            "options": {}
        },
        {
            "files": "*.ts",
            "options": {}
        }
    ]
}

artifacts...build-info...69d81f151678f44bf2b547bd22a018b2.json

{
	"id": "69d81f151678f44bf2b547bd22a018b2",
	"_format": "hh-sol-build-info-1",
	"solcVersion": "0.8.30",
	"solcLongVersion": "0.8.30+commit.73712a01",
	"input": {
		"language": "Solidity",
		"sources": {
			"encryptedChat.sol": {
				"content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.20;\n\n/// @notice Backward-compatible interface preserving V1 and exposing V2 envelopes.\ninterface IEncryptedChat {\n    // V1 event (preserved for backwards compatibility)\n    event MessageSent(address indexed from, address indexed to, bytes encryptedMessage);\n\n    // V2 envelope event (preferred)\n    // - messageId: keccak256 over chainId, from, to, contentHash or content blob, and a nonce\n    // - uri: optional pointer to off-chain ciphertext (e.g., IPFS, Arweave, TEN-native storage)\n    // - content: optional ciphertext blob (if emitted on-chain)\n    // - contentHash: helps dedupe/verify without revealing size/content\n    // - contentType: app-level enum (e.g., 0=unknown, 1=text, 2=media, 3=attachment...)\n    // - extra: reserved for future flags/metadata to ease forwards-compatibility\n    event MessageSentV2(\n        address indexed from,\n        address indexed to,\n        bytes32 indexed messageId,\n        string uri,\n        bytes content,\n        bytes32 contentHash,\n        uint256 timestamp,\n        uint8 contentType,\n        bytes extra\n    );\n\n    // Minimal struct to keep V1 compatibility for getMessages()\n    struct Message {\n        address from;\n        address to;\n        bytes encryptedMessage;\n        uint256 timestamp;\n    }\n\n    // Optional storage modes per-user\n    enum StorageMode {\n        None,        // Do not persist in state; only emit events\n        EventsOnly,  // Default: Emit events only (same as None for state, explicit name for clarity)\n        Full         // Persist to contract storage (gas and privacy trade-offs)\n    }\n\n    // Per-user preferences to control storage and relaying\n    struct UserPrefs {\n        StorageMode storageMode;\n        bool acceptRelayed;     // Allow ERC-2771 relayed calls if trusted forwarder is configured\n        bool mirrorV1Event;     // Emit legacy MessageSent event for compatibility\n    }\n\n    // --- Core V1-compatible surface ---\n    function sendMessage(address _to, bytes calldata _encryptedMessage) external;\n    function getMessages() external view returns (Message[] memory);\n\n    // --- V2 preferred surface ---\n    function sendMessageV2(\n        address _to,\n        bytes calldata _content,\n        string calldata _uri,\n        bytes32 _contentHash,\n        uint8 _contentType,\n        bytes calldata _extra\n    ) external returns (bytes32 messageId);\n\n    // Set and read preferences\n    function setUserPrefs(UserPrefs calldata prefs) external;\n    function getUserPrefs(address user) external view returns (UserPrefs memory);\n\n    // Nonces for deduplication / messageId\n    function nonces(address user) external view returns (uint256);\n}"
			}
		},
		"settings": {
			"optimizer": {
				"enabled": false,
				"runs": 200
			},
			"outputSelection": {
				"*": {
					"": [
						"ast"
					],
					"*": [
						"abi",
						"metadata",
						"devdoc",
						"userdoc",
						"storageLayout",
						"evm.legacyAssembly",
						"evm.bytecode",
						"evm.deployedBytecode",
						"evm.methodIdentifiers",
						"evm.gasEstimates",
						"evm.assembly"
					]
				}
			},
			"remappings": []
		}
	},
	"output": {
		"contracts": {
			"encryptedChat.sol": {
				"IEncryptedChat": {
					"abi": [
						{
							"anonymous": false,
							"inputs": [
								{
									"indexed": true,
									"internalType": "address",
									"name": "from",
									"type": "address"
								},
								{
									"indexed": true,
									"internalType": "address",
									"name": "to",
									"type": "address"
								},
								{
									"indexed": false,
									"internalType": "bytes",
									"name": "encryptedMessage",
									"type": "bytes"
								}
							],
							"name": "MessageSent",
							"type": "event"
						},
						{
							"anonymous": false,
							"inputs": [
								{
									"indexed": true,
									"internalType": "address",
									"name": "from",
									"type": "address"
								},
								{
									"indexed": true,
									"internalType": "address",
									"name": "to",
									"type": "address"
								},
								{
									"indexed": true,
									"internalType": "bytes32",
									"name": "messageId",
									"type": "bytes32"
								},
								{
									"indexed": false,
									"internalType": "string",
									"name": "uri",
									"type": "string"
								},
								{
									"indexed": false,
									"internalType": "bytes",
									"name": "content",
									"type": "bytes"
								},
								{
									"indexed": false,
									"internalType": "bytes32",
									"name": "contentHash",
									"type": "bytes32"
								},
								{
									"indexed": false,
									"internalType": "uint256",
									"name": "timestamp",
									"type": "uint256"
								},
								{
									"indexed": false,
									"internalType": "uint8",
									"name": "contentType",
									"type": "uint8"
								},
								{
									"indexed": false,
									"internalType": "bytes",
									"name": "extra",
									"type": "bytes"
								}
							],
							"name": "MessageSentV2",
							"type": "event"
						},
						{
							"inputs": [],
							"name": "getMessages",
							"outputs": [
								{
									"components": [
										{
											"internalType": "address",
											"name": "from",
											"type": "address"
										},
										{
											"internalType": "address",
											"name": "to",
											"type": "address"
										},
										{
											"internalType": "bytes",
											"name": "encryptedMessage",
											"type": "bytes"
										},
										{
											"internalType": "uint256",
											"name": "timestamp",
											"type": "uint256"
										}
									],
									"internalType": "struct IEncryptedChat.Message[]",
									"name": "",
									"type": "tuple[]"
								}
							],
							"stateMutability": "view",
							"type": "function"
						},
						{
							"inputs": [
								{
									"internalType": "address",
									"name": "user",
									"type": "address"
								}
							],
							"name": "getUserPrefs",
							"outputs": [
								{
									"components": [
										{
											"internalType": "enum IEncryptedChat.StorageMode",
											"name": "storageMode",
											"type": "uint8"
										},
										{
											"internalType": "bool",
											"name": "acceptRelayed",
											"type": "bool"
										},
										{
											"internalType": "bool",
											"name": "mirrorV1Event",
											"type": "bool"
										}
									],
									"internalType": "struct IEncryptedChat.UserPrefs",
									"name": "",
									"type": "tuple"
								}
							],
							"stateMutability": "view",
							"type": "function"
						},
						{
							"inputs": [
								{
									"internalType": "address",
									"name": "user",
									"type": "address"
								}
							],
							"name": "nonces",
							"outputs": [
								{
									"internalType": "uint256",
									"name": "",
									"type": "uint256"
								}
							],
							"stateMutability": "view",
							"type": "function"
						},
						{
							"inputs": [
								{
									"internalType": "address",
									"name": "_to",
									"type": "address"
								},
								{
									"internalType": "bytes",
									"name": "_encryptedMessage",
									"type": "bytes"
								}
							],
							"name": "sendMessage",
							"outputs": [],
							"stateMutability": "nonpayable",
							"type": "function"
						},
						{
							"inputs": [
								{
									"internalType": "address",
									"name": "_to",
									"type": "address"
								},
								{
									"internalType": "bytes",
									"name": "_content",
									"type": "bytes"
								},
								{
									"internalType": "string",
									"name": "_uri",
									"type": "string"
								},
								{
									"internalType": "bytes32",
									"name": "_contentHash",
									"type": "bytes32"
								},
								{
									"internalType": "uint8",
									"name": "_contentType",
									"type": "uint8"
								},
								{
									"internalType": "bytes",
									"name": "_extra",
									"type": "bytes"
								}
							],
							"name": "sendMessageV2",
							"outputs": [
								{
									"internalType": "bytes32",
									"name": "messageId",
									"type": "bytes32"
								}
							],
							"stateMutability": "nonpayable",
							"type": "function"
						},
						{
							"inputs": [
								{
									"components": [
										{
											"internalType": "enum IEncryptedChat.StorageMode",
											"name": "storageMode",
											"type": "uint8"
										},
										{
											"internalType": "bool",
											"name": "acceptRelayed",
											"type": "bool"
										},
										{
											"internalType": "bool",
											"name": "mirrorV1Event",
											"type": "bool"
										}
									],
									"internalType": "struct IEncryptedChat.UserPrefs",
									"name": "prefs",
									"type": "tuple"
								}
							],
							"name": "setUserPrefs",
							"outputs": [],
							"stateMutability": "nonpayable",
							"type": "function"
						}
					],
					"devdoc": {
						"kind": "dev",
						"methods": {},
						"version": 1
					},
					"evm": {
						"assembly": "",
						"bytecode": {
							"functionDebugData": {},
							"generatedSources": [],
							"linkReferences": {},
							"object": "",
							"opcodes": "",
							"sourceMap": ""
						},
						"deployedBytecode": {
							"functionDebugData": {},
							"generatedSources": [],
							"immutableReferences": {},
							"linkReferences": {},
							"object": "",
							"opcodes": "",
							"sourceMap": ""
						},
						"gasEstimates": null,
						"legacyAssembly": null,
						"methodIdentifiers": {
							"getMessages()": "5ff6cbf3",
							"getUserPrefs(address)": "1c65797a",
							"nonces(address)": "7ecebe00",
							"sendMessage(address,bytes)": "bb5ddb0f",
							"sendMessageV2(address,bytes,string,bytes32,uint8,bytes)": "3c1688c6",
							"setUserPrefs((uint8,bool,bool))": "f1203475"
						}
					},
					"metadata": "{\"compiler\":{\"version\":\"0.8.30+commit.73712a01\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"encryptedMessage\",\"type\":\"bytes\"}],\"name\":\"MessageSent\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"bytes32\",\"name\":\"messageId\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"string\",\"name\":\"uri\",\"type\":\"string\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"content\",\"type\":\"bytes\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"contentHash\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"timestamp\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"contentType\",\"type\":\"uint8\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"extra\",\"type\":\"bytes\"}],\"name\":\"MessageSentV2\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"getMessages\",\"outputs\":[{\"components\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"bytes\",\"name\":\"encryptedMessage\",\"type\":\"bytes\"},{\"internalType\":\"uint256\",\"name\":\"timestamp\",\"type\":\"uint256\"}],\"internalType\":\"struct IEncryptedChat.Message[]\",\"name\":\"\",\"type\":\"tuple[]\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"user\",\"type\":\"address\"}],\"name\":\"getUserPrefs\",\"outputs\":[{\"components\":[{\"internalType\":\"enum IEncryptedChat.StorageMode\",\"name\":\"storageMode\",\"type\":\"uint8\"},{\"internalType\":\"bool\",\"name\":\"acceptRelayed\",\"type\":\"bool\"},{\"internalType\":\"bool\",\"name\":\"mirrorV1Event\",\"type\":\"bool\"}],\"internalType\":\"struct IEncryptedChat.UserPrefs\",\"name\":\"\",\"type\":\"tuple\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"user\",\"type\":\"address\"}],\"name\":\"nonces\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"bytes\",\"name\":\"_encryptedMessage\",\"type\":\"bytes\"}],\"name\":\"sendMessage\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"bytes\",\"name\":\"_content\",\"type\":\"bytes\"},{\"internalType\":\"string\",\"name\":\"_uri\",\"type\":\"string\"},{\"internalType\":\"bytes32\",\"name\":\"_contentHash\",\"type\":\"bytes32\"},{\"internalType\":\"uint8\",\"name\":\"_contentType\",\"type\":\"uint8\"},{\"internalType\":\"bytes\",\"name\":\"_extra\",\"type\":\"bytes\"}],\"name\":\"sendMessageV2\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"messageId\",\"type\":\"bytes32\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"components\":[{\"internalType\":\"enum IEncryptedChat.StorageMode\",\"name\":\"storageMode\",\"type\":\"uint8\"},{\"internalType\":\"bool\",\"name\":\"acceptRelayed\",\"type\":\"bool\"},{\"internalType\":\"bool\",\"name\":\"mirrorV1Event\",\"type\":\"bool\"}],\"internalType\":\"struct IEncryptedChat.UserPrefs\",\"name\":\"prefs\",\"type\":\"tuple\"}],\"name\":\"setUserPrefs\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"notice\":\"Backward-compatible interface preserving V1 and exposing V2 envelopes.\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"encryptedChat.sol\":\"IEncryptedChat\"},\"evmVersion\":\"prague\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"encryptedChat.sol\":{\"keccak256\":\"0x28fdaf1419a85ec9502a5cf5d7ea5e2696b9f7bffe6397e801474dfa7a1766e0\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://09a47f0811540712fa96614363cbd23858a35b0c544d96bc01817e494fce33ec\",\"dweb:/ipfs/QmU4eCjzjGJgHqG73n3itpfimrYDFTvD2vBE8b1LZsqHt4\"]}},\"version\":1}",
					"storageLayout": {
						"storage": [],
						"types": null
					},
					"userdoc": {
						"kind": "user",
						"methods": {},
						"notice": "Backward-compatible interface preserving V1 and exposing V2 envelopes.",
						"version": 1
					}
				}
			}
		},
		"sources": {
			"encryptedChat.sol": {
				"ast": {
					"absolutePath": "encryptedChat.sol",
					"exportedSymbols": {
						"IEncryptedChat": [
							104
						]
					},
					"id": 105,
					"license": "MIT",
					"nodeType": "SourceUnit",
					"nodes": [
						{
							"id": 1,
							"literals": [
								"solidity",
								"^",
								"0.8",
								".20"
							],
							"nodeType": "PragmaDirective",
							"src": "32:24:0"
						},
						{
							"abstract": false,
							"baseContracts": [],
							"canonicalName": "IEncryptedChat",
							"contractDependencies": [],
							"contractKind": "interface",
							"documentation": {
								"id": 2,
								"nodeType": "StructuredDocumentation",
								"src": "58:83:0",
								"text": "@notice Backward-compatible interface preserving V1 and exposing V2 envelopes."
							},
							"fullyImplemented": false,
							"id": 104,
							"linearizedBaseContracts": [
								104
							],
							"name": "IEncryptedChat",
							"nameLocation": "151:14:0",
							"nodeType": "ContractDefinition",
							"nodes": [
								{
									"anonymous": false,
									"eventSelector": "a9fd5a3d7859b925a2044bdb5fe382592e1161b75964331e1e0e5872ee730432",
									"id": 10,
									"name": "MessageSent",
									"nameLocation": "234:11:0",
									"nodeType": "EventDefinition",
									"parameters": {
										"id": 9,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 4,
												"indexed": true,
												"mutability": "mutable",
												"name": "from",
												"nameLocation": "262:4:0",
												"nodeType": "VariableDeclaration",
												"scope": 10,
												"src": "246:20:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_address",
													"typeString": "address"
												},
												"typeName": {
													"id": 3,
													"name": "address",
													"nodeType": "ElementaryTypeName",
													"src": "246:7:0",
													"stateMutability": "nonpayable",
													"typeDescriptions": {
														"typeIdentifier": "t_address",
														"typeString": "address"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 6,
												"indexed": true,
												"mutability": "mutable",
												"name": "to",
												"nameLocation": "284:2:0",
												"nodeType": "VariableDeclaration",
												"scope": 10,
												"src": "268:18:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_address",
													"typeString": "address"
												},
												"typeName": {
													"id": 5,
													"name": "address",
													"nodeType": "ElementaryTypeName",
													"src": "268:7:0",
													"stateMutability": "nonpayable",
													"typeDescriptions": {
														"typeIdentifier": "t_address",
														"typeString": "address"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 8,
												"indexed": false,
												"mutability": "mutable",
												"name": "encryptedMessage",
												"nameLocation": "294:16:0",
												"nodeType": "VariableDeclaration",
												"scope": 10,
												"src": "288:22:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes_memory_ptr",
													"typeString": "bytes"
												},
												"typeName": {
													"id": 7,
													"name": "bytes",
													"nodeType": "ElementaryTypeName",
													"src": "288:5:0",
													"typeDescriptions": {
														"typeIdentifier": "t_bytes_storage_ptr",
														"typeString": "bytes"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "245:66:0"
									},
									"src": "228:84:0"
								},
								{
									"anonymous": false,
									"eventSelector": "ec9eabaa10d461395a44122ad43e535fef22b6e320b26d60372d22c391f26291",
									"id": 30,
									"name": "MessageSentV2",
									"nameLocation": "862:13:0",
									"nodeType": "EventDefinition",
									"parameters": {
										"id": 29,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 12,
												"indexed": true,
												"mutability": "mutable",
												"name": "from",
												"nameLocation": "901:4:0",
												"nodeType": "VariableDeclaration",
												"scope": 30,
												"src": "885:20:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_address",
													"typeString": "address"
												},
												"typeName": {
													"id": 11,
													"name": "address",
													"nodeType": "ElementaryTypeName",
													"src": "885:7:0",
													"stateMutability": "nonpayable",
													"typeDescriptions": {
														"typeIdentifier": "t_address",
														"typeString": "address"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 14,
												"indexed": true,
												"mutability": "mutable",
												"name": "to",
												"nameLocation": "931:2:0",
												"nodeType": "VariableDeclaration",
												"scope": 30,
												"src": "915:18:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_address",
													"typeString": "address"
												},
												"typeName": {
													"id": 13,
													"name": "address",
													"nodeType": "ElementaryTypeName",
													"src": "915:7:0",
													"stateMutability": "nonpayable",
													"typeDescriptions": {
														"typeIdentifier": "t_address",
														"typeString": "address"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 16,
												"indexed": true,
												"mutability": "mutable",
												"name": "messageId",
												"nameLocation": "959:9:0",
												"nodeType": "VariableDeclaration",
												"scope": 30,
												"src": "943:25:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes32",
													"typeString": "bytes32"
												},
												"typeName": {
													"id": 15,
													"name": "bytes32",
													"nodeType": "ElementaryTypeName",
													"src": "943:7:0",
													"typeDescriptions": {
														"typeIdentifier": "t_bytes32",
														"typeString": "bytes32"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 18,
												"indexed": false,
												"mutability": "mutable",
												"name": "uri",
												"nameLocation": "985:3:0",
												"nodeType": "VariableDeclaration",
												"scope": 30,
												"src": "978:10:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_string_memory_ptr",
													"typeString": "string"
												},
												"typeName": {
													"id": 17,
													"name": "string",
													"nodeType": "ElementaryTypeName",
													"src": "978:6:0",
													"typeDescriptions": {
														"typeIdentifier": "t_string_storage_ptr",
														"typeString": "string"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 20,
												"indexed": false,
												"mutability": "mutable",
												"name": "content",
												"nameLocation": "1004:7:0",
												"nodeType": "VariableDeclaration",
												"scope": 30,
												"src": "998:13:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes_memory_ptr",
													"typeString": "bytes"
												},
												"typeName": {
													"id": 19,
													"name": "bytes",
													"nodeType": "ElementaryTypeName",
													"src": "998:5:0",
													"typeDescriptions": {
														"typeIdentifier": "t_bytes_storage_ptr",
														"typeString": "bytes"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 22,
												"indexed": false,
												"mutability": "mutable",
												"name": "contentHash",
												"nameLocation": "1029:11:0",
												"nodeType": "VariableDeclaration",
												"scope": 30,
												"src": "1021:19:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes32",
													"typeString": "bytes32"
												},
												"typeName": {
													"id": 21,
													"name": "bytes32",
													"nodeType": "ElementaryTypeName",
													"src": "1021:7:0",
													"typeDescriptions": {
														"typeIdentifier": "t_bytes32",
														"typeString": "bytes32"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 24,
												"indexed": false,
												"mutability": "mutable",
												"name": "timestamp",
												"nameLocation": "1058:9:0",
												"nodeType": "VariableDeclaration",
												"scope": 30,
												"src": "1050:17:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_uint256",
													"typeString": "uint256"
												},
												"typeName": {
													"id": 23,
													"name": "uint256",
													"nodeType": "ElementaryTypeName",
													"src": "1050:7:0",
													"typeDescriptions": {
														"typeIdentifier": "t_uint256",
														"typeString": "uint256"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 26,
												"indexed": false,
												"mutability": "mutable",
												"name": "contentType",
												"nameLocation": "1083:11:0",
												"nodeType": "VariableDeclaration",
												"scope": 30,
												"src": "1077:17:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_uint8",
													"typeString": "uint8"
												},
												"typeName": {
													"id": 25,
													"name": "uint8",
													"nodeType": "ElementaryTypeName",
													"src": "1077:5:0",
													"typeDescriptions": {
														"typeIdentifier": "t_uint8",
														"typeString": "uint8"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 28,
												"indexed": false,
												"mutability": "mutable",
												"name": "extra",
												"nameLocation": "1110:5:0",
												"nodeType": "VariableDeclaration",
												"scope": 30,
												"src": "1104:11:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes_memory_ptr",
													"typeString": "bytes"
												},
												"typeName": {
													"id": 27,
													"name": "bytes",
													"nodeType": "ElementaryTypeName",
													"src": "1104:5:0",
													"typeDescriptions": {
														"typeIdentifier": "t_bytes_storage_ptr",
														"typeString": "bytes"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "875:246:0"
									},
									"src": "856:266:0"
								},
								{
									"canonicalName": "IEncryptedChat.Message",
									"id": 39,
									"members": [
										{
											"constant": false,
											"id": 32,
											"mutability": "mutable",
											"name": "from",
											"nameLocation": "1226:4:0",
											"nodeType": "VariableDeclaration",
											"scope": 39,
											"src": "1218:12:0",
											"stateVariable": false,
											"storageLocation": "default",
											"typeDescriptions": {
												"typeIdentifier": "t_address",
												"typeString": "address"
											},
											"typeName": {
												"id": 31,
												"name": "address",
												"nodeType": "ElementaryTypeName",
												"src": "1218:7:0",
												"stateMutability": "nonpayable",
												"typeDescriptions": {
													"typeIdentifier": "t_address",
													"typeString": "address"
												}
											},
											"visibility": "internal"
										},
										{
											"constant": false,
											"id": 34,
											"mutability": "mutable",
											"name": "to",
											"nameLocation": "1248:2:0",
											"nodeType": "VariableDeclaration",
											"scope": 39,
											"src": "1240:10:0",
											"stateVariable": false,
											"storageLocation": "default",
											"typeDescriptions": {
												"typeIdentifier": "t_address",
												"typeString": "address"
											},
											"typeName": {
												"id": 33,
												"name": "address",
												"nodeType": "ElementaryTypeName",
												"src": "1240:7:0",
												"stateMutability": "nonpayable",
												"typeDescriptions": {
													"typeIdentifier": "t_address",
													"typeString": "address"
												}
											},
											"visibility": "internal"
										},
										{
											"constant": false,
											"id": 36,
											"mutability": "mutable",
											"name": "encryptedMessage",
											"nameLocation": "1266:16:0",
											"nodeType": "VariableDeclaration",
											"scope": 39,
											"src": "1260:22:0",
											"stateVariable": false,
											"storageLocation": "default",
											"typeDescriptions": {
												"typeIdentifier": "t_bytes_storage_ptr",
												"typeString": "bytes"
											},
											"typeName": {
												"id": 35,
												"name": "bytes",
												"nodeType": "ElementaryTypeName",
												"src": "1260:5:0",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes_storage_ptr",
													"typeString": "bytes"
												}
											},
											"visibility": "internal"
										},
										{
											"constant": false,
											"id": 38,
											"mutability": "mutable",
											"name": "timestamp",
											"nameLocation": "1300:9:0",
											"nodeType": "VariableDeclaration",
											"scope": 39,
											"src": "1292:17:0",
											"stateVariable": false,
											"storageLocation": "default",
											"typeDescriptions": {
												"typeIdentifier": "t_uint256",
												"typeString": "uint256"
											},
											"typeName": {
												"id": 37,
												"name": "uint256",
												"nodeType": "ElementaryTypeName",
												"src": "1292:7:0",
												"typeDescriptions": {
													"typeIdentifier": "t_uint256",
													"typeString": "uint256"
												}
											},
											"visibility": "internal"
										}
									],
									"name": "Message",
									"nameLocation": "1200:7:0",
									"nodeType": "StructDefinition",
									"scope": 104,
									"src": "1193:123:0",
									"visibility": "public"
								},
								{
									"canonicalName": "IEncryptedChat.StorageMode",
									"id": 43,
									"members": [
										{
											"id": 40,
											"name": "None",
											"nameLocation": "1388:4:0",
											"nodeType": "EnumValue",
											"src": "1388:4:0"
										},
										{
											"id": 41,
											"name": "EventsOnly",
											"nameLocation": "1454:10:0",
											"nodeType": "EnumValue",
											"src": "1454:10:0"
										},
										{
											"id": 42,
											"name": "Full",
											"nameLocation": "1556:4:0",
											"nodeType": "EnumValue",
											"src": "1556:4:0"
										}
									],
									"name": "StorageMode",
									"nameLocation": "1366:11:0",
									"nodeType": "EnumDefinition",
									"src": "1361:273:0"
								},
								{
									"canonicalName": "IEncryptedChat.UserPrefs",
									"id": 51,
									"members": [
										{
											"constant": false,
											"id": 46,
											"mutability": "mutable",
											"name": "storageMode",
											"nameLocation": "1739:11:0",
											"nodeType": "VariableDeclaration",
											"scope": 51,
											"src": "1727:23:0",
											"stateVariable": false,
											"storageLocation": "default",
											"typeDescriptions": {
												"typeIdentifier": "t_enum$_StorageMode_$43",
												"typeString": "enum IEncryptedChat.StorageMode"
											},
											"typeName": {
												"id": 45,
												"nodeType": "UserDefinedTypeName",
												"pathNode": {
													"id": 44,
													"name": "StorageMode",
													"nameLocations": [
														"1727:11:0"
													],
													"nodeType": "IdentifierPath",
													"referencedDeclaration": 43,
													"src": "1727:11:0"
												},
												"referencedDeclaration": 43,
												"src": "1727:11:0",
												"typeDescriptions": {
													"typeIdentifier": "t_enum$_StorageMode_$43",
													"typeString": "enum IEncryptedChat.StorageMode"
												}
											},
											"visibility": "internal"
										},
										{
											"constant": false,
											"id": 48,
											"mutability": "mutable",
											"name": "acceptRelayed",
											"nameLocation": "1765:13:0",
											"nodeType": "VariableDeclaration",
											"scope": 51,
											"src": "1760:18:0",
											"stateVariable": false,
											"storageLocation": "default",
											"typeDescriptions": {
												"typeIdentifier": "t_bool",
												"typeString": "bool"
											},
											"typeName": {
												"id": 47,
												"name": "bool",
												"nodeType": "ElementaryTypeName",
												"src": "1760:4:0",
												"typeDescriptions": {
													"typeIdentifier": "t_bool",
													"typeString": "bool"
												}
											},
											"visibility": "internal"
										},
										{
											"constant": false,
											"id": 50,
											"mutability": "mutable",
											"name": "mirrorV1Event",
											"nameLocation": "1864:13:0",
											"nodeType": "VariableDeclaration",
											"scope": 51,
											"src": "1859:18:0",
											"stateVariable": false,
											"storageLocation": "default",
											"typeDescriptions": {
												"typeIdentifier": "t_bool",
												"typeString": "bool"
											},
											"typeName": {
												"id": 49,
												"name": "bool",
												"nodeType": "ElementaryTypeName",
												"src": "1859:4:0",
												"typeDescriptions": {
													"typeIdentifier": "t_bool",
													"typeString": "bool"
												}
											},
											"visibility": "internal"
										}
									],
									"name": "UserPrefs",
									"nameLocation": "1707:9:0",
									"nodeType": "StructDefinition",
									"scope": 104,
									"src": "1700:239:0",
									"visibility": "public"
								},
								{
									"functionSelector": "bb5ddb0f",
									"id": 58,
									"implemented": false,
									"kind": "function",
									"modifiers": [],
									"name": "sendMessage",
									"nameLocation": "1996:11:0",
									"nodeType": "FunctionDefinition",
									"parameters": {
										"id": 56,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 53,
												"mutability": "mutable",
												"name": "_to",
												"nameLocation": "2016:3:0",
												"nodeType": "VariableDeclaration",
												"scope": 58,
												"src": "2008:11:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_address",
													"typeString": "address"
												},
												"typeName": {
													"id": 52,
													"name": "address",
													"nodeType": "ElementaryTypeName",
													"src": "2008:7:0",
													"stateMutability": "nonpayable",
													"typeDescriptions": {
														"typeIdentifier": "t_address",
														"typeString": "address"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 55,
												"mutability": "mutable",
												"name": "_encryptedMessage",
												"nameLocation": "2036:17:0",
												"nodeType": "VariableDeclaration",
												"scope": 58,
												"src": "2021:32:0",
												"stateVariable": false,
												"storageLocation": "calldata",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes_calldata_ptr",
													"typeString": "bytes"
												},
												"typeName": {
													"id": 54,
													"name": "bytes",
													"nodeType": "ElementaryTypeName",
													"src": "2021:5:0",
													"typeDescriptions": {
														"typeIdentifier": "t_bytes_storage_ptr",
														"typeString": "bytes"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "2007:47:0"
									},
									"returnParameters": {
										"id": 57,
										"nodeType": "ParameterList",
										"parameters": [],
										"src": "2063:0:0"
									},
									"scope": 104,
									"src": "1987:77:0",
									"stateMutability": "nonpayable",
									"virtual": false,
									"visibility": "external"
								},
								{
									"functionSelector": "5ff6cbf3",
									"id": 65,
									"implemented": false,
									"kind": "function",
									"modifiers": [],
									"name": "getMessages",
									"nameLocation": "2078:11:0",
									"nodeType": "FunctionDefinition",
									"parameters": {
										"id": 59,
										"nodeType": "ParameterList",
										"parameters": [],
										"src": "2089:2:0"
									},
									"returnParameters": {
										"id": 64,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 63,
												"mutability": "mutable",
												"name": "",
												"nameLocation": "-1:-1:-1",
												"nodeType": "VariableDeclaration",
												"scope": 65,
												"src": "2115:16:0",
												"stateVariable": false,
												"storageLocation": "memory",
												"typeDescriptions": {
													"typeIdentifier": "t_array$_t_struct$_Message_$39_memory_ptr_$dyn_memory_ptr",
													"typeString": "struct IEncryptedChat.Message[]"
												},
												"typeName": {
													"baseType": {
														"id": 61,
														"nodeType": "UserDefinedTypeName",
														"pathNode": {
															"id": 60,
															"name": "Message",
															"nameLocations": [
																"2115:7:0"
															],
															"nodeType": "IdentifierPath",
															"referencedDeclaration": 39,
															"src": "2115:7:0"
														},
														"referencedDeclaration": 39,
														"src": "2115:7:0",
														"typeDescriptions": {
															"typeIdentifier": "t_struct$_Message_$39_storage_ptr",
															"typeString": "struct IEncryptedChat.Message"
														}
													},
													"id": 62,
													"nodeType": "ArrayTypeName",
													"src": "2115:9:0",
													"typeDescriptions": {
														"typeIdentifier": "t_array$_t_struct$_Message_$39_storage_$dyn_storage_ptr",
														"typeString": "struct IEncryptedChat.Message[]"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "2114:18:0"
									},
									"scope": 104,
									"src": "2069:64:0",
									"stateMutability": "view",
									"virtual": false,
									"visibility": "external"
								},
								{
									"functionSelector": "3c1688c6",
									"id": 82,
									"implemented": false,
									"kind": "function",
									"modifiers": [],
									"name": "sendMessageV2",
									"nameLocation": "2184:13:0",
									"nodeType": "FunctionDefinition",
									"parameters": {
										"id": 78,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 67,
												"mutability": "mutable",
												"name": "_to",
												"nameLocation": "2215:3:0",
												"nodeType": "VariableDeclaration",
												"scope": 82,
												"src": "2207:11:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_address",
													"typeString": "address"
												},
												"typeName": {
													"id": 66,
													"name": "address",
													"nodeType": "ElementaryTypeName",
													"src": "2207:7:0",
													"stateMutability": "nonpayable",
													"typeDescriptions": {
														"typeIdentifier": "t_address",
														"typeString": "address"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 69,
												"mutability": "mutable",
												"name": "_content",
												"nameLocation": "2243:8:0",
												"nodeType": "VariableDeclaration",
												"scope": 82,
												"src": "2228:23:0",
												"stateVariable": false,
												"storageLocation": "calldata",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes_calldata_ptr",
													"typeString": "bytes"
												},
												"typeName": {
													"id": 68,
													"name": "bytes",
													"nodeType": "ElementaryTypeName",
													"src": "2228:5:0",
													"typeDescriptions": {
														"typeIdentifier": "t_bytes_storage_ptr",
														"typeString": "bytes"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 71,
												"mutability": "mutable",
												"name": "_uri",
												"nameLocation": "2277:4:0",
												"nodeType": "VariableDeclaration",
												"scope": 82,
												"src": "2261:20:0",
												"stateVariable": false,
												"storageLocation": "calldata",
												"typeDescriptions": {
													"typeIdentifier": "t_string_calldata_ptr",
													"typeString": "string"
												},
												"typeName": {
													"id": 70,
													"name": "string",
													"nodeType": "ElementaryTypeName",
													"src": "2261:6:0",
													"typeDescriptions": {
														"typeIdentifier": "t_string_storage_ptr",
														"typeString": "string"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 73,
												"mutability": "mutable",
												"name": "_contentHash",
												"nameLocation": "2299:12:0",
												"nodeType": "VariableDeclaration",
												"scope": 82,
												"src": "2291:20:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes32",
													"typeString": "bytes32"
												},
												"typeName": {
													"id": 72,
													"name": "bytes32",
													"nodeType": "ElementaryTypeName",
													"src": "2291:7:0",
													"typeDescriptions": {
														"typeIdentifier": "t_bytes32",
														"typeString": "bytes32"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 75,
												"mutability": "mutable",
												"name": "_contentType",
												"nameLocation": "2327:12:0",
												"nodeType": "VariableDeclaration",
												"scope": 82,
												"src": "2321:18:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_uint8",
													"typeString": "uint8"
												},
												"typeName": {
													"id": 74,
													"name": "uint8",
													"nodeType": "ElementaryTypeName",
													"src": "2321:5:0",
													"typeDescriptions": {
														"typeIdentifier": "t_uint8",
														"typeString": "uint8"
													}
												},
												"visibility": "internal"
											},
											{
												"constant": false,
												"id": 77,
												"mutability": "mutable",
												"name": "_extra",
												"nameLocation": "2364:6:0",
												"nodeType": "VariableDeclaration",
												"scope": 82,
												"src": "2349:21:0",
												"stateVariable": false,
												"storageLocation": "calldata",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes_calldata_ptr",
													"typeString": "bytes"
												},
												"typeName": {
													"id": 76,
													"name": "bytes",
													"nodeType": "ElementaryTypeName",
													"src": "2349:5:0",
													"typeDescriptions": {
														"typeIdentifier": "t_bytes_storage_ptr",
														"typeString": "bytes"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "2197:179:0"
									},
									"returnParameters": {
										"id": 81,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 80,
												"mutability": "mutable",
												"name": "messageId",
												"nameLocation": "2403:9:0",
												"nodeType": "VariableDeclaration",
												"scope": 82,
												"src": "2395:17:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_bytes32",
													"typeString": "bytes32"
												},
												"typeName": {
													"id": 79,
													"name": "bytes32",
													"nodeType": "ElementaryTypeName",
													"src": "2395:7:0",
													"typeDescriptions": {
														"typeIdentifier": "t_bytes32",
														"typeString": "bytes32"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "2394:19:0"
									},
									"scope": 104,
									"src": "2175:239:0",
									"stateMutability": "nonpayable",
									"virtual": false,
									"visibility": "external"
								},
								{
									"functionSelector": "f1203475",
									"id": 88,
									"implemented": false,
									"kind": "function",
									"modifiers": [],
									"name": "setUserPrefs",
									"nameLocation": "2461:12:0",
									"nodeType": "FunctionDefinition",
									"parameters": {
										"id": 86,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 85,
												"mutability": "mutable",
												"name": "prefs",
												"nameLocation": "2493:5:0",
												"nodeType": "VariableDeclaration",
												"scope": 88,
												"src": "2474:24:0",
												"stateVariable": false,
												"storageLocation": "calldata",
												"typeDescriptions": {
													"typeIdentifier": "t_struct$_UserPrefs_$51_calldata_ptr",
													"typeString": "struct IEncryptedChat.UserPrefs"
												},
												"typeName": {
													"id": 84,
													"nodeType": "UserDefinedTypeName",
													"pathNode": {
														"id": 83,
														"name": "UserPrefs",
														"nameLocations": [
															"2474:9:0"
														],
														"nodeType": "IdentifierPath",
														"referencedDeclaration": 51,
														"src": "2474:9:0"
													},
													"referencedDeclaration": 51,
													"src": "2474:9:0",
													"typeDescriptions": {
														"typeIdentifier": "t_struct$_UserPrefs_$51_storage_ptr",
														"typeString": "struct IEncryptedChat.UserPrefs"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "2473:26:0"
									},
									"returnParameters": {
										"id": 87,
										"nodeType": "ParameterList",
										"parameters": [],
										"src": "2508:0:0"
									},
									"scope": 104,
									"src": "2452:57:0",
									"stateMutability": "nonpayable",
									"virtual": false,
									"visibility": "external"
								},
								{
									"functionSelector": "1c65797a",
									"id": 96,
									"implemented": false,
									"kind": "function",
									"modifiers": [],
									"name": "getUserPrefs",
									"nameLocation": "2523:12:0",
									"nodeType": "FunctionDefinition",
									"parameters": {
										"id": 91,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 90,
												"mutability": "mutable",
												"name": "user",
												"nameLocation": "2544:4:0",
												"nodeType": "VariableDeclaration",
												"scope": 96,
												"src": "2536:12:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_address",
													"typeString": "address"
												},
												"typeName": {
													"id": 89,
													"name": "address",
													"nodeType": "ElementaryTypeName",
													"src": "2536:7:0",
													"stateMutability": "nonpayable",
													"typeDescriptions": {
														"typeIdentifier": "t_address",
														"typeString": "address"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "2535:14:0"
									},
									"returnParameters": {
										"id": 95,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 94,
												"mutability": "mutable",
												"name": "",
												"nameLocation": "-1:-1:-1",
												"nodeType": "VariableDeclaration",
												"scope": 96,
												"src": "2573:16:0",
												"stateVariable": false,
												"storageLocation": "memory",
												"typeDescriptions": {
													"typeIdentifier": "t_struct$_UserPrefs_$51_memory_ptr",
													"typeString": "struct IEncryptedChat.UserPrefs"
												},
												"typeName": {
													"id": 93,
													"nodeType": "UserDefinedTypeName",
													"pathNode": {
														"id": 92,
														"name": "UserPrefs",
														"nameLocations": [
															"2573:9:0"
														],
														"nodeType": "IdentifierPath",
														"referencedDeclaration": 51,
														"src": "2573:9:0"
													},
													"referencedDeclaration": 51,
													"src": "2573:9:0",
													"typeDescriptions": {
														"typeIdentifier": "t_struct$_UserPrefs_$51_storage_ptr",
														"typeString": "struct IEncryptedChat.UserPrefs"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "2572:18:0"
									},
									"scope": 104,
									"src": "2514:77:0",
									"stateMutability": "view",
									"virtual": false,
									"visibility": "external"
								},
								{
									"functionSelector": "7ecebe00",
									"id": 103,
									"implemented": false,
									"kind": "function",
									"modifiers": [],
									"name": "nonces",
									"nameLocation": "2650:6:0",
									"nodeType": "FunctionDefinition",
									"parameters": {
										"id": 99,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 98,
												"mutability": "mutable",
												"name": "user",
												"nameLocation": "2665:4:0",
												"nodeType": "VariableDeclaration",
												"scope": 103,
												"src": "2657:12:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_address",
													"typeString": "address"
												},
												"typeName": {
													"id": 97,
													"name": "address",
													"nodeType": "ElementaryTypeName",
													"src": "2657:7:0",
													"stateMutability": "nonpayable",
													"typeDescriptions": {
														"typeIdentifier": "t_address",
														"typeString": "address"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "2656:14:0"
									},
									"returnParameters": {
										"id": 102,
										"nodeType": "ParameterList",
										"parameters": [
											{
												"constant": false,
												"id": 101,
												"mutability": "mutable",
												"name": "",
												"nameLocation": "-1:-1:-1",
												"nodeType": "VariableDeclaration",
												"scope": 103,
												"src": "2694:7:0",
												"stateVariable": false,
												"storageLocation": "default",
												"typeDescriptions": {
													"typeIdentifier": "t_uint256",
													"typeString": "uint256"
												},
												"typeName": {
													"id": 100,
													"name": "uint256",
													"nodeType": "ElementaryTypeName",
													"src": "2694:7:0",
													"typeDescriptions": {
														"typeIdentifier": "t_uint256",
														"typeString": "uint256"
													}
												},
												"visibility": "internal"
											}
										],
										"src": "2693:9:0"
									},
									"scope": 104,
									"src": "2641:62:0",
									"stateMutability": "view",
									"virtual": false,
									"visibility": "external"
								}
							],
							"scope": 105,
							"src": "141:2564:0",
							"usedErrors": [],
							"usedEvents": [
								10,
								30
							]
						}
					],
					"src": "32:2673:0"
				},
				"id": 0
			}
		}
	}
}

artifacts...IEncryptedChat.json

{
	"deploy": {
		"VM:-": {
			"linkReferences": {},
			"autoDeployLib": true
		},
		"main:1": {
			"linkReferences": {},
			"autoDeployLib": true
		},
		"ropsten:3": {
			"linkReferences": {},
			"autoDeployLib": true
		},
		"rinkeby:4": {
			"linkReferences": {},
			"autoDeployLib": true
		},
		"kovan:42": {
			"linkReferences": {},
			"autoDeployLib": true
		},
		"goerli:5": {
			"linkReferences": {},
			"autoDeployLib": true
		},
		"Custom": {
			"linkReferences": {},
			"autoDeployLib": true
		}
	},
	"data": {
		"bytecode": {
			"functionDebugData": {},
			"generatedSources": [],
			"linkReferences": {},
			"object": "",
			"opcodes": "",
			"sourceMap": ""
		},
		"deployedBytecode": {
			"functionDebugData": {},
			"generatedSources": [],
			"immutableReferences": {},
			"linkReferences": {},
			"object": "",
			"opcodes": "",
			"sourceMap": ""
		},
		"gasEstimates": null,
		"methodIdentifiers": {
			"getMessages()": "5ff6cbf3",
			"getUserPrefs(address)": "1c65797a",
			"nonces(address)": "7ecebe00",
			"sendMessage(address,bytes)": "bb5ddb0f",
			"sendMessageV2(address,bytes,string,bytes32,uint8,bytes)": "3c1688c6",
			"setUserPrefs((uint8,bool,bool))": "f1203475"
		}
	},
	"abi": [
		{
			"anonymous": false,
			"inputs": [
				{
					"indexed": true,
					"internalType": "address",
					"name": "from",
					"type": "address"
				},
				{
					"indexed": true,
					"internalType": "address",
					"name": "to",
					"type": "address"
				},
				{
					"indexed": false,
					"internalType": "bytes",
					"name": "encryptedMessage",
					"type": "bytes"
				}
			],
			"name": "MessageSent",
			"type": "event"
		},
		{
			"anonymous": false,
			"inputs": [
				{
					"indexed": true,
					"internalType": "address",
					"name": "from",
					"type": "address"
				},
				{
					"indexed": true,
					"internalType": "address",
					"name": "to",
					"type": "address"
				},
				{
					"indexed": true,
					"internalType": "bytes32",
					"name": "messageId",
					"type": "bytes32"
				},
				{
					"indexed": false,
					"internalType": "string",
					"name": "uri",
					"type": "string"
				},
				{
					"indexed": false,
					"internalType": "bytes",
					"name": "content",
					"type": "bytes"
				},
				{
					"indexed": false,
					"internalType": "bytes32",
					"name": "contentHash",
					"type": "bytes32"
				},
				{
					"indexed": false,
					"internalType": "uint256",
					"name": "timestamp",
					"type": "uint256"
				},
				{
					"indexed": false,
					"internalType": "uint8",
					"name": "contentType",
					"type": "uint8"
				},
				{
					"indexed": false,
					"internalType": "bytes",
					"name": "extra",
					"type": "bytes"
				}
			],
			"name": "MessageSentV2",
			"type": "event"
		},
		{
			"inputs": [],
			"name": "getMessages",
			"outputs": [
				{
					"components": [
						{
							"internalType": "address",
							"name": "from",
							"type": "address"
						},
						{
							"internalType": "address",
							"name": "to",
							"type": "address"
						},
						{
							"internalType": "bytes",
							"name": "encryptedMessage",
							"type": "bytes"
						},
						{
							"internalType": "uint256",
							"name": "timestamp",
							"type": "uint256"
						}
					],
					"internalType": "struct IEncryptedChat.Message[]",
					"name": "",
					"type": "tuple[]"
				}
			],
			"stateMutability": "view",
			"type": "function"
		},
		{
			"inputs": [
				{
					"internalType": "address",
					"name": "user",
					"type": "address"
				}
			],
			"name": "getUserPrefs",
			"outputs": [
				{
					"components": [
						{
							"internalType": "enum IEncryptedChat.StorageMode",
							"name": "storageMode",
							"type": "uint8"
						},
						{
							"internalType": "bool",
							"name": "acceptRelayed",
							"type": "bool"
						},
						{
							"internalType": "bool",
							"name": "mirrorV1Event",
							"type": "bool"
						}
					],
					"internalType": "struct IEncryptedChat.UserPrefs",
					"name": "",
					"type": "tuple"
				}
			],
			"stateMutability": "view",
			"type": "function"
		},
		{
			"inputs": [
				{
					"internalType": "address",
					"name": "user",
					"type": "address"
				}
			],
			"name": "nonces",
			"outputs": [
				{
					"internalType": "uint256",
					"name": "",
					"type": "uint256"
				}
			],
			"stateMutability": "view",
			"type": "function"
		},
		{
			"inputs": [
				{
					"internalType": "address",
					"name": "_to",
					"type": "address"
				},
				{
					"internalType": "bytes",
					"name": "_encryptedMessage",
					"type": "bytes"
				}
			],
			"name": "sendMessage",
			"outputs": [],
			"stateMutability": "nonpayable",
			"type": "function"
		},
		{
			"inputs": [
				{
					"internalType": "address",
					"name": "_to",
					"type": "address"
				},
				{
					"internalType": "bytes",
					"name": "_content",
					"type": "bytes"
				},
				{
					"internalType": "string",
					"name": "_uri",
					"type": "string"
				},
				{
					"internalType": "bytes32",
					"name": "_contentHash",
					"type": "bytes32"
				},
				{
					"internalType": "uint8",
					"name": "_contentType",
					"type": "uint8"
				},
				{
					"internalType": "bytes",
					"name": "_extra",
					"type": "bytes"
				}
			],
			"name": "sendMessageV2",
			"outputs": [
				{
					"internalType": "bytes32",
					"name": "messageId",
					"type": "bytes32"
				}
			],
			"stateMutability": "nonpayable",
			"type": "function"
		},
		{
			"inputs": [
				{
					"components": [
						{
							"internalType": "enum IEncryptedChat.StorageMode",
							"name": "storageMode",
							"type": "uint8"
						},
						{
							"internalType": "bool",
							"name": "acceptRelayed",
							"type": "bool"
						},
						{
							"internalType": "bool",
							"name": "mirrorV1Event",
							"type": "bool"
						}
					],
					"internalType": "struct IEncryptedChat.UserPrefs",
					"name": "prefs",
					"type": "tuple"
				}
			],
			"name": "setUserPrefs",
			"outputs": [],
			"stateMutability": "nonpayable",
			"type": "function"
		}
	]
}

artifacts...IEncryptedChat_metadata.json

{
	"compiler": {
		"version": "0.8.30+commit.73712a01"
	},
	"language": "Solidity",
	"output": {
		"abi": [
			{
				"anonymous": false,
				"inputs": [
					{
						"indexed": true,
						"internalType": "address",
						"name": "from",
						"type": "address"
					},
					{
						"indexed": true,
						"internalType": "address",
						"name": "to",
						"type": "address"
					},
					{
						"indexed": false,
						"internalType": "bytes",
						"name": "encryptedMessage",
						"type": "bytes"
					}
				],
				"name": "MessageSent",
				"type": "event"
			},
			{
				"anonymous": false,
				"inputs": [
					{
						"indexed": true,
						"internalType": "address",
						"name": "from",
						"type": "address"
					},
					{
						"indexed": true,
						"internalType": "address",
						"name": "to",
						"type": "address"
					},
					{
						"indexed": true,
						"internalType": "bytes32",
						"name": "messageId",
						"type": "bytes32"
					},
					{
						"indexed": false,
						"internalType": "string",
						"name": "uri",
						"type": "string"
					},
					{
						"indexed": false,
						"internalType": "bytes",
						"name": "content",
						"type": "bytes"
					},
					{
						"indexed": false,
						"internalType": "bytes32",
						"name": "contentHash",
						"type": "bytes32"
					},
					{
						"indexed": false,
						"internalType": "uint256",
						"name": "timestamp",
						"type": "uint256"
					},
					{
						"indexed": false,
						"internalType": "uint8",
						"name": "contentType",
						"type": "uint8"
					},
					{
						"indexed": false,
						"internalType": "bytes",
						"name": "extra",
						"type": "bytes"
					}
				],
				"name": "MessageSentV2",
				"type": "event"
			},
			{
				"inputs": [],
				"name": "getMessages",
				"outputs": [
					{
						"components": [
							{
								"internalType": "address",
								"name": "from",
								"type": "address"
							},
							{
								"internalType": "address",
								"name": "to",
								"type": "address"
							},
							{
								"internalType": "bytes",
								"name": "encryptedMessage",
								"type": "bytes"
							},
							{
								"internalType": "uint256",
								"name": "timestamp",
								"type": "uint256"
							}
						],
						"internalType": "struct IEncryptedChat.Message[]",
						"name": "",
						"type": "tuple[]"
					}
				],
				"stateMutability": "view",
				"type": "function"
			},
			{
				"inputs": [
					{
						"internalType": "address",
						"name": "user",
						"type": "address"
					}
				],
				"name": "getUserPrefs",
				"outputs": [
					{
						"components": [
							{
								"internalType": "enum IEncryptedChat.StorageMode",
								"name": "storageMode",
								"type": "uint8"
							},
							{
								"internalType": "bool",
								"name": "acceptRelayed",
								"type": "bool"
							},
							{
								"internalType": "bool",
								"name": "mirrorV1Event",
								"type": "bool"
							}
						],
						"internalType": "struct IEncryptedChat.UserPrefs",
						"name": "",
						"type": "tuple"
					}
				],
				"stateMutability": "view",
				"type": "function"
			},
			{
				"inputs": [
					{
						"internalType": "address",
						"name": "user",
						"type": "address"
					}
				],
				"name": "nonces",
				"outputs": [
					{
						"internalType": "uint256",
						"name": "",
						"type": "uint256"
					}
				],
				"stateMutability": "view",
				"type": "function"
			},
			{
				"inputs": [
					{
						"internalType": "address",
						"name": "_to",
						"type": "address"
					},
					{
						"internalType": "bytes",
						"name": "_encryptedMessage",
						"type": "bytes"
					}
				],
				"name": "sendMessage",
				"outputs": [],
				"stateMutability": "nonpayable",
				"type": "function"
			},
			{
				"inputs": [
					{
						"internalType": "address",
						"name": "_to",
						"type": "address"
					},
					{
						"internalType": "bytes",
						"name": "_content",
						"type": "bytes"
					},
					{
						"internalType": "string",
						"name": "_uri",
						"type": "string"
					},
					{
						"internalType": "bytes32",
						"name": "_contentHash",
						"type": "bytes32"
					},
					{
						"internalType": "uint8",
						"name": "_contentType",
						"type": "uint8"
					},
					{
						"internalType": "bytes",
						"name": "_extra",
						"type": "bytes"
					}
				],
				"name": "sendMessageV2",
				"outputs": [
					{
						"internalType": "bytes32",
						"name": "messageId",
						"type": "bytes32"
					}
				],
				"stateMutability": "nonpayable",
				"type": "function"
			},
			{
				"inputs": [
					{
						"components": [
							{
								"internalType": "enum IEncryptedChat.StorageMode",
								"name": "storageMode",
								"type": "uint8"
							},
							{
								"internalType": "bool",
								"name": "acceptRelayed",
								"type": "bool"
							},
							{
								"internalType": "bool",
								"name": "mirrorV1Event",
								"type": "bool"
							}
						],
						"internalType": "struct IEncryptedChat.UserPrefs",
						"name": "prefs",
						"type": "tuple"
					}
				],
				"name": "setUserPrefs",
				"outputs": [],
				"stateMutability": "nonpayable",
				"type": "function"
			}
		],
		"devdoc": {
			"kind": "dev",
			"methods": {},
			"version": 1
		},
		"userdoc": {
			"kind": "user",
			"methods": {},
			"notice": "Backward-compatible interface preserving V1 and exposing V2 envelopes.",
			"version": 1
		}
	},
	"settings": {
		"compilationTarget": {
			"encryptedChat.sol": "IEncryptedChat"
		},
		"evmVersion": "prague",
		"libraries": {},
		"metadata": {
			"bytecodeHash": "ipfs"
		},
		"optimizer": {
			"enabled": false,
			"runs": 200
		},
		"remappings": []
	},
	"sources": {
		"encryptedChat.sol": {
			"keccak256": "0x28fdaf1419a85ec9502a5cf5d7ea5e2696b9f7bffe6397e801474dfa7a1766e0",
			"license": "MIT",
			"urls": [
				"bzz-raw://09a47f0811540712fa96614363cbd23858a35b0c544d96bc01817e494fce33ec",
				"dweb:/ipfs/QmU4eCjzjGJgHqG73n3itpfimrYDFTvD2vBE8b1LZsqHt4"
			]
		}
	},
	"version": 1
}

encryptedChat.sol

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

/// @notice Backward-compatible interface preserving V1 and exposing V2 envelopes.
interface IEncryptedChat {
    // V1 event (preserved for backwards compatibility)
    event MessageSent(address indexed from, address indexed to, bytes encryptedMessage);

    // V2 envelope event (preferred)
    // - messageId: keccak256 over chainId, from, to, contentHash or content blob, and a nonce
    // - uri: optional pointer to off-chain ciphertext (e.g., IPFS, Arweave, TEN-native storage)
    // - content: optional ciphertext blob (if emitted on-chain)
    // - contentHash: helps dedupe/verify without revealing size/content
    // - contentType: app-level enum (e.g., 0=unknown, 1=text, 2=media, 3=attachment...)
    // - extra: reserved for future flags/metadata to ease forwards-compatibility
    event MessageSentV2(
        address indexed from,
        address indexed to,
        bytes32 indexed messageId,
        string uri,
        bytes content,
        bytes32 contentHash,
        uint256 timestamp,
        uint8 contentType,
        bytes extra
    );

    // Minimal struct to keep V1 compatibility for getMessages()
    struct Message {
        address from;
        address to;
        bytes encryptedMessage;
        uint256 timestamp;
    }

    // Optional storage modes per-user
    enum StorageMode {
        None,        // Do not persist in state; only emit events
        EventsOnly,  // Default: Emit events only (same as None for state, explicit name for clarity)
        Full         // Persist to contract storage (gas and privacy trade-offs)
    }

    // Per-user preferences to control storage and relaying
    struct UserPrefs {
        StorageMode storageMode;
        bool acceptRelayed;     // Allow ERC-2771 relayed calls if trusted forwarder is configured
        bool mirrorV1Event;     // Emit legacy MessageSent event for compatibility
    }

    // --- Core V1-compatible surface ---
    function sendMessage(address _to, bytes calldata _encryptedMessage) external;
    function getMessages() external view returns (Message[] memory);

    // --- V2 preferred surface ---
    function sendMessageV2(
        address _to,
        bytes calldata _content,
        string calldata _uri,
        bytes32 _contentHash,
        uint8 _contentType,
        bytes calldata _extra
    ) external returns (bytes32 messageId);

    // Set and read preferences
    function setUserPrefs(UserPrefs calldata prefs) external;
    function getUserPrefs(address user) external view returns (UserPrefs memory);

    // Nonces for deduplication / messageId
    function nonces(address user) external view returns (uint256);
}

gifting.sol

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

import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import {UUPSUpgradeable} from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import {AccessControlUpgradeable} from "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import {PausableUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/PausableUpgradeable.sol";
import {ReentrancyGuardUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

/// @title WhisperrGifting
/// @notice Simple native and ERC-20 gifting with fee routing for TEN-native experiences.
contract WhisperrGifting is
    Initializable,
    UUPSUpgradeable,
    AccessControlUpgradeable,
    PausableUpgradeable,
    ReentrancyGuardUpgradeable
{
    using SafeERC20 for IERC20;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
    bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
    bytes32 public constant UPGRADER_ROLE = keccak256("UPGRADER_ROLE");

    address public feeRecipient;
    uint96 public feeBps; // 1 = 0.01%, 100 = 1%, 10000 = 100%

    event GiftSentNative(address indexed from, address indexed to, uint256 amount, bytes32 indexed ref, bytes note);
    event GiftSentERC20(address indexed from, address indexed to, address indexed token, uint256 amount, bytes32 ref, bytes note);
    event FeeUpdated(address feeRecipient, uint96 feeBps);

    function initialize(address admin, address _feeRecipient, uint96 _feeBps) public initializer {
        __AccessControl_init();
        __Pausable_init();
        __ReentrancyGuard_init();
        __UUPSUpgradeable_init();

        _grantRole(DEFAULT_ADMIN_ROLE, admin);
        _grantRole(PAUSER_ROLE, admin);
        _grantRole(UPGRADER_ROLE, admin);

        feeRecipient = _feeRecipient;
        feeBps = _feeBps;
        emit FeeUpdated(_feeRecipient, _feeBps);
    }

    function setFee(address _recipient, uint96 _bps) external onlyRole(DEFAULT_ADMIN_ROLE) {
        require(_bps <= 1000, "fee too high"); // <=10%
        feeRecipient = _recipient;
        feeBps = _bps;
        emit FeeUpdated(_recipient, _bps);
    }

    function pause() external onlyRole(PAUSER_ROLE) { _pause(); }
    function unpause() external onlyRole(PAUSER_ROLE) { _unpause(); }

    // Native TEN gifting
    function giftNative(address to, bytes32 ref, bytes calldata note) external payable whenNotPaused nonReentrant {
        require(to != address(0), "zero to");
        uint256 amount = msg.value;
        require(amount > 0, "no value");

        uint256 fee = (amount * feeBps) / 10000;
        uint256 net = amount - fee;

        if (fee > 0 && feeRecipient != address(0)) {
            (bool fs, ) = feeRecipient.call{value: fee}("");
            require(fs, "fee xfer failed");
        }

        (bool s, ) = to.call{value: net}("");
        require(s, "xfer failed");

        emit GiftSentNative(msg.sender, to, net, ref, note);
    }

    // ERC-20 gifting (simple transfer)
    function giftERC20(address token, address to, uint256 amount, bytes32 ref, bytes calldata note) external whenNotPaused nonReentrant {
        require(to != address(0), "zero to");
        require(amount > 0, "no amount");

        uint256 fee = (amount * feeBps) / 10000;
        uint256 net = amount - fee;

        IERC20(token).safeTransferFrom(msg.sender, address(this), amount);
        if (fee > 0 && feeRecipient != address(0)) {
            IERC20(token).safeTransfer(feeRecipient, fee);
        }
        IERC20(token).safeTransfer(to, net);

        emit GiftSentERC20(msg.sender, to, token, net, ref, note);
    }

    function _authorizeUpgrade(address newImplementation) internal override onlyRole(UPGRADER_ROLE) {}

    receive() external payable {}
}

premium.sol

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

import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import {UUPSUpgradeable} from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import {AccessControlUpgradeable} from "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import {PausableUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/PausableUpgradeable.sol";
import {ReentrancyGuardUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

/// @title PremiumSubscription
/// @notice Simple time-based premium with native or ERC-20 payments.
contract PremiumSubscription is
    Initializable,
    UUPSUpgradeable,
    AccessControlUpgradeable,
    PausableUpgradeable,
    ReentrancyGuardUpgradeable
{
    using SafeERC20 for IERC20;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
    bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
    bytes32 public constant UPGRADER_ROLE = keccak256("UPGRADER_ROLE");

    // price per second in native units; if 0, disabled
    uint256 public nativePricePerSecond;
    // optional ERC-20 pricing
    mapping(address => uint256) public erc20PricePerSecond;

    mapping(address => uint256) public expiry;

    event Subscribed(address indexed user, uint256 newExpiry, address paymentToken, uint256 paid);
    event PricesUpdated(address paymentToken, uint256 pricePerSecond);

    function initialize(address admin, uint256 _nativePricePerSecond) public initializer {
        __AccessControl_init();
        __Pausable_init();
        __ReentrancyGuard_init();
        __UUPSUpgradeable_init();

        _grantRole(DEFAULT_ADMIN_ROLE, admin);
        _grantRole(PAUSER_ROLE, admin);
        _grantRole(UPGRADER_ROLE, admin);

        nativePricePerSecond = _nativePricePerSecond;
        emit PricesUpdated(address(0), _nativePricePerSecond);
    }

    function setNativePrice(uint256 pricePerSecond) external onlyRole(DEFAULT_ADMIN_ROLE) {
        nativePricePerSecond = pricePerSecond;
        emit PricesUpdated(address(0), pricePerSecond);
    }

    function setERC20Price(address token, uint256 pricePerSecond) external onlyRole(DEFAULT_ADMIN_ROLE) {
        erc20PricePerSecond[token] = pricePerSecond;
        emit PricesUpdated(token, pricePerSecond);
    }

    function pause() external onlyRole(PAUSER_ROLE) { _pause(); }
    function unpause() external onlyRole(PAUSER_ROLE) { _unpause(); }

    function subscribeWithNative(uint256 durationSeconds) external payable whenNotPaused nonReentrant {
        require(nativePricePerSecond > 0, "native disabled");
        uint256 cost = nativePricePerSecond * durationSeconds;
        require(msg.value >= cost, "insufficient value");

        // excess refund
        if (msg.value > cost) {
            (bool rs, ) = msg.sender.call{value: msg.value - cost}("");
            require(rs, "refund failed");
        }

        _extend(msg.sender, durationSeconds);
        emit Subscribed(msg.sender, expiry[msg.sender], address(0), cost);
    }

    function subscribeWithERC20(address token, uint256 durationSeconds) external whenNotPaused nonReentrant {
        uint256 pps = erc20PricePerSecond[token];
        require(pps > 0, "token disabled");
        uint256 cost = pps * durationSeconds;
        IERC20(token).safeTransferFrom(msg.sender, address(this), cost);
        _extend(msg.sender, durationSeconds);
        emit Subscribed(msg.sender, expiry[msg.sender], token, cost);
    }

    function _extend(address user, uint256 duration) internal {
        uint256 current = expiry[user];
        uint256 start = current > block.timestamp ? current : block.timestamp;
        expiry[user] = start + duration;
    }

    function _authorizeUpgrade(address newImplementation) internal override onlyRole(UPGRADER_ROLE) {}

    receive() external payable {}
}