import { EventEmitter2 } from '@nestjs/event-emitter';
import { StatsRegistryService } from './stats-registry.service';
export declare class StatsAggregatorService {
    private readonly registryService;
    private readonly eventEmitter;
    private readonly logger;
    private cache;
    private ttlMs;
    constructor(registryService: StatsRegistryService, eventEmitter: EventEmitter2);
    listKeys(): string[];
    get<T = unknown>(key: string, params?: Record<string, unknown>): Promise<T>;
    getAll(params?: Record<string, unknown>): Promise<Record<string, unknown>>;
    broadcastStatsInfo(): Promise<void>;
}