export declare enum NotiflyStorageKeys {
    PROJECT_ID = "__notiflyProjectID",
    USERNAME = "__notiflyUserName",
    PASSWORD = "__notiflyPassword",
    COGNITO_ID_TOKEN = "__notiflyCognitoIDToken",
    EXTERNAL_USER_ID = "__notiflyExternalUserID",
    NOTIFLY_DEVICE_ID = "__notiflyDeviceID",
    NOTIFLY_STATE = "__notiflyState",
    LAST_SESSION_TIME = "__notiflyLastSessionTime",
    NOTIFLY_NOTIFICATION_PERMISSION = "__notiflyNotificationPermission",
    SW_VERSION = "__notiflySWVersion"
}
export declare class NotiflyStorage {
    private static readonly TRANSACTION_TIMEOUT;
    private static storage;
    static ensureInitialized(): Promise<void>;
    static getNotiflyUserId(): Promise<string>;
    static getItems(keys: NotiflyStorageKeys[]): Promise<Array<string | null>>;
    static getItem(key: NotiflyStorageKeys): Promise<string | null>;
    static setItems(data: Partial<Record<NotiflyStorageKeys, string>>): Promise<void>;
    static setItem(key: NotiflyStorageKeys, value: string): Promise<void>;
    static removeItems(keys: NotiflyStorageKeys[]): Promise<void>;
    static removeItem(key: NotiflyStorageKeys): Promise<void>;
    private static _withTimeout;
}
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