/**
 * Storage interface for cached DTS files and negative URL lookups.
 *
 * Implemented by:
 * - TypesDB (web client) — wraps Dexie/IndexedDB
 * - FsDtsCache (CLI) — wraps the filesystem under ~/.typebulb/cache/dts/
 *
 * The DTS resolver consumes this interface; consumers inject their own
 * implementation.
 */
export interface DtsCache {
    /** Get cached DTS content + source URL for a package. */
    getCachedDts(pkg: string): Promise<{
        content: string;
        url?: string;
    } | undefined>;
    /** Cache DTS content for a package. */
    setCachedDts(pkg: string, content: string, url?: string): Promise<void>;
    /** Get cached .d.ts file content by URL. */
    getCachedFile(url: string): Promise<string | undefined>;
    /** Cache .d.ts file content by URL. */
    setCachedFile(url: string, content: string): Promise<void>;
    /** Check whether a URL is currently in the negative cache. */
    isNegative(url: string): Promise<boolean>;
    /** Record a negative lookup for a URL (with exponential backoff TTL). */
    recordNegative(url: string): Promise<void>;
    /** Clear a negative lookup for a URL. */
    clearNegative(url: string): Promise<void>;
}
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