export declare function persistToLocal(purpose: string, data: string): Promise<void>;
export declare function takeoutDataFromLocal(purpose: string): Promise<string>;
export declare function clearPersistenceData(purpose: string): Promise<void>;
export declare function clearPersistenceDataWithPrefix(prefix: string): Promise<unknown>;
export declare function takeoutDataFromLocalWithPrefix(prefix: string): Promise<unknown>;
export declare enum LocalDataOperateType {
    UPDATE = 0,
    FETCH = 1,
    FETCH_WITH_PREFIX = 2,
    CLEAR = 3,
    CLEAR_WITH_PREFIX = 4
}
export declare function operateLocalData(purpose: string, operate: LocalDataOperateType, data?: string): Promise<unknown>;