/**
 * LRU cache for offline/fast scoring.
 */
import type { IReliabilityScore } from './types.js';
export declare class LRUCache {
    private cache;
    private maxSize;
    private ttl;
    constructor(maxSize?: number, ttl?: number);
    get(key: string): IReliabilityScore | undefined;
    set(key: string, score: IReliabilityScore): void;
    clear(): void;
    get size(): number;
    static makeKey(input: string, output: string, domain: string): string;
}
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