import type { DtsCache } from './cache.js';
export type FetchOut = {
    dts: string;
    url: string;
} | undefined;
/**
 * Factory: returns a `fetchDtsWithCache(url)` function backed by the given
 * persistent DtsCache plus an in-process LRU negative cache and an in-flight
 * dedup map. The closure isolates cache state per resolver instance.
 */
export declare function createFetchDts(cache: DtsCache): (url: string) => Promise<FetchOut>;
export type FetchDtsWithCache = ReturnType<typeof createFetchDts>;
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