import { type OnModuleDestroy } from '@nestjs/common';
import { UpstreamManagerService } from './upstream-manager.service';
import type { UpstreamConfig } from './upstream.interface';
export declare class HealthCheckerService implements OnModuleDestroy {
    private readonly upstreamManager;
    private readonly logger;
    private readonly intervals;
    constructor(upstreamManager: UpstreamManagerService);
    startAll(configs: UpstreamConfig[]): void;
    start(config: UpstreamConfig): void;
    check(name: string, timeoutMs?: number): Promise<boolean>;
    stop(name: string): void;
    stopAll(): void;
    onModuleDestroy(): void;
}
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