/**
 * Wrap local storage implementation in order to:
 * - provide a better interface (typed key-value pair for multiget-multiset instead of array of array)
 * - easily allow to switch to any kind of local storage implementation
 */
export interface ILocalStorage {
    setItem: (key: LocalStorageKeys, data: string) => void | Promise<unknown>;
    getItem: (key: LocalStorageKeys) => string | null;
    setBoolean: (key: LocalStorageKeys, data: boolean) => false | void;
    getBoolean: (key: LocalStorageKeys) => boolean;
    multiSet: (data: LocalStorageKeyValuePair) => void;
    multiGet: (...keys: LocalStorageKeys[]) => Promise<LocalStorageKeyValuePair>;
    multiRemove: (...keys: LocalStorageKeys[]) => Promise<void>;
    removeItem: (key: LocalStorageKeys) => Promise<void>;
    clear: () => void;
}
export declare type LocalStorageKeys = "userId" | "userToken";
declare type LocalStorageKeyValuePair = {
    [key in Partial<LocalStorageKeys>]?: string;
};
export declare const localStorageHelper: ILocalStorage;
export {};