declare class SimpleCache {
    private readonly ttlMs;
    private readonly maxEntries;
    private readonly cache;
    private readonly inflight;
    private readonly tagIndex;
    private readonly keyTags;
    constructor(ttlMs?: number, maxEntries?: number);
    get<T>(key: string): T | undefined;
    set<T>(key: string, value: T, ttlMs?: number): void;
    getOrSet<T>(key: string, loader: () => Promise<T>, ttlMs?: number): Promise<T>;
    attachTags(key: string, tags: string[]): void;
    flushTags(tags: string[]): number;
    invalidate(key: string): boolean;
    invalidateByPrefix(prefix: string): number;
    clear(): void;
    size(): number;
    private detachKeyFromTags;
    private getFreshEntry;
    private pruneExpired;
    private evictOverflow;
}
export { SimpleCache };
export default SimpleCache;