import Namespace from '../services/namespace.js';
import Config from '../services/config.js';
import Logger from '../services/logger.js';
import HttpClient from '../services/http_client.js';
import type { Request, Response, NextFunction } from 'express';
interface ZipkinEndpoint {
    serviceName: unknown;
    ipv4: string;
    port: unknown;
}
interface ZipkinAnnotation {
    endpoint: ZipkinEndpoint;
    timestamp: number;
    value: string;
}
interface ZipkinBinaryAnnotation {
    key: string;
    value: unknown;
}
interface ZipkinSpan {
    id: string;
    traceId: string;
    name: string;
    timestamp: number;
    duration: number;
    annotations: ZipkinAnnotation[];
    binaryAnnotations: ZipkinBinaryAnnotation[];
    parentId?: string;
}
interface TracerQuery {
    query: unknown;
    cost: number;
    finishedAt: number;
}
interface Tracer {
    serviceName: unknown;
    method: string;
    url: string;
    port: string | number;
    spanId: string;
    traceId: string;
    parentId: string;
    sampled: number;
    timestamp: number;
    duration: number;
    statusCode: number;
    queries: TracerQuery[];
    debug: Record<string, unknown>;
}
export declare const tracerToZipkins: (tracer: Tracer | null | undefined) => false | ZipkinSpan[];
declare function TraceMiddleware(ns: Namespace, config: Config, logger: Logger, client: HttpClient): (name?: string) => (req: Request, res: Response, next: NextFunction) => void;
export default TraceMiddleware;