/**
 * Small in-memory TTL cache with LRU-ish eviction (Map insertion order).
 * Values are cached per (query, variables) key by the client.
 */
export interface TtlCacheOptions {
    maxEntries?: number;
    now?: () => number;
}
export declare class TtlCache<V = unknown> {
    private readonly maxEntries;
    private readonly now;
    private readonly map;
    constructor(opts?: TtlCacheOptions);
    get(key: string): V | undefined;
    set(key: string, value: V, ttlMs: number): void;
    get size(): number;
    clear(): void;
}