export interface CacheOptions {
    key: string;
    expireMS?: number;
    revalidateMS?: number;
    expireError?: number;
    cacheError?: boolean;
    lifetime?: 'pageload' | 'session' | 'persistent';
}
export interface CachePerformer<T> extends CacheOptions {
    perform: () => Promise<T>;
}
export declare function cache<T>(opts: CachePerformer<T>): Promise<T>;