import type { CacheStats } from "./types";
export declare class ResponseCache {
    private cache;
    private ttl;
    private hits;
    private misses;
    constructor(ttlMinutes?: number);
    get(key: string): string | null;
    set(key: string, value: string): void;
    clear(): void;
    getStats(): CacheStats;
    getHitRate(): number;
}
export declare const versionCache: ResponseCache;
export declare class RequestDeduplicator {
    private pending;
    dedupe<T>(key: string, fn: () => Promise<T>): Promise<T>;
    clear(): void;
}
export declare const requestDeduplicator: RequestDeduplicator;