/**
 * Cache storage layer using IndexedDB via @push.rocks/webstore
 */
import type { ICacheEntry } from '../webrequest.types.js';
export declare class CacheStore {
    private webstore;
    private initPromise;
    constructor(dbName?: string, storeName?: string);
    /**
     * Initialize the store
     */
    private init;
    /**
     * Generate a cache key from a request
     */
    generateCacheKey(request: Request): string;
    /**
     * Store a response in the cache
     */
    set(cacheKey: string, entry: ICacheEntry): Promise<void>;
    /**
     * Retrieve a cached response
     */
    get(cacheKey: string): Promise<ICacheEntry | null>;
    /**
     * Check if a cache entry exists
     */
    has(cacheKey: string): Promise<boolean>;
    /**
     * Delete a cache entry
     */
    delete(cacheKey: string): Promise<void>;
    /**
     * Clear all cache entries
     */
    clear(): Promise<void>;
    /**
     * Create a Response object from a cache entry
     */
    responseFromCacheEntry(entry: ICacheEntry): Response;
    /**
     * Create a cache entry from a Response object
     */
    cacheEntryFromResponse(url: string, response: Response, metadata?: {
        maxAge?: number;
        etag?: string;
        lastModified?: string;
    }): Promise<ICacheEntry>;
    /**
     * Prune expired entries (garbage collection)
     * Returns the number of entries deleted
     */
    pruneExpired(): Promise<number>;
}