import { NestMiddleware } from '@nestjs/common';
import { NextFunction, Request, Response } from 'express';
import { Counter, Histogram } from 'prom-client';
import { LogService } from '../../modules';
export declare class GatewayMetricMiddleware implements NestMiddleware {
    private logService;
    private gatewayDurationMetric;
    private gatewayTotalMetric;
    constructor(logService: LogService, gatewayDurationMetric: Histogram<string>, gatewayTotalMetric: Counter<string>);
    use(req: Request, res: Response, next: NextFunction): void;
}
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