/// <reference types="node" />
/// <reference types="src/prometheus/knex-prometheus-exporter" />
import promClient from 'prom-client';
import expressPromBundle from 'express-prom-bundle';
import { KnexExporterResult } from 'knex-prometheus-exporter';
import fs from 'fs';
import type { Router } from 'express';
import type { Knex } from 'knex';
import type { Log } from './types';
interface PrometheusConfig {
    version: string;
    namespace: string;
    name: string;
    ipAddress: string;
    pod: string;
    buildBranch?: string;
    buildVersion?: string;
    distPath: string;
}
declare class Prometheus {
    private _register;
    private readonly _config;
    private readonly _log;
    private _buildInfoCount;
    private _buildInfoMax;
    private _buildInfoSum;
    private _dynamicallyCreatedHistograms;
    constructor(config: PrometheusConfig, log?: Log);
    metrics(): Promise<string>;
    metricsInJson(): Promise<promClient.MetricObjectWithValues<promClient.MetricValue<string>>[]>;
    getExpressMetricsMiddleware(): expressPromBundle.Middleware;
    registerKnex(knex: Knex, id: string): KnexExporterResult;
    unregisterKnex(exporter: KnexExporterResult): void;
    attachToExpress(router: Pick<Router, 'get'>): Pick<Router, "get">;
    buildInfoFile(): void;
    getInfoFile(): fs.ReadStream;
    createHistogram(name: string, help: string, labelNames?: string[]): promClient.Histogram<string>;
    startHistogram(metricName: string, labels: Record<string, string>): (labels?: Partial<Record<string, string | number>> | undefined) => number;
}
export { Prometheus };