import type { Client } from 'pg';
import { type Registry } from 'prom-client';
import type { PgClientExporterOptions } from './pgClientExporterOptions';
/**
 * Exports metrics for the pg.Client module
 */
export declare class PgClientPrometheusExporter {
    private readonly client;
    private readonly register;
    private readonly options;
    private readonly defaultOptions;
    private readonly PG_CLIENT_ERRORS_TOTAL;
    private readonly PG_CLIENT_DISCONNECTS_TOTAL;
    private readonly clientErrors;
    private readonly clientDisconnects;
    constructor(client: Client, register: Registry, options?: PgClientExporterOptions);
    enableMetrics(): void;
    onClientError(_error: Error): void;
    onClientEnd(): void;
}