import express = require("express");

declare function json2xls(json: any, options?: json2xls.Config): Buffer;

declare namespace json2xls {
    interface Config {
        fields?: Record<string, string> | string[] | undefined;
        style?: string | undefined;
    }

    function middleware(
        req: express.Request,
        res: express.Response,
        next: express.NextFunction,
    ): void;
}

export = json2xls;