import { VisitorCacheDTO, IVisitorCacheImplementation } from "@flagship.io/js-sdk";
export declare const VISITOR_PREFIX = "FS_VISITOR_CACHE_";
export declare class DefaultVisitorCache implements IVisitorCacheImplementation {
    cacheVisitor(visitorId: string, data: VisitorCacheDTO): Promise<void>;
    lookupVisitor(visitorId: string): Promise<VisitorCacheDTO>;
    flushVisitor(visitorId: string): Promise<void>;
}