import { Request, Response } from 'express';
import { ECS } from './ecs.interface';
export declare namespace ECSWinston {
    interface Config {
        /**
         * The return of this function will be defined in the fields "http.request.id" (when using req: Express and res: Express) and "trace.id".
         */
        setTraceId?: () => string | null;
        /**
         * Defines the list of fields that should be excluded from all logs. E.g: ["http.request.headers.authorization", "http.request.body.content"].
         */
        exclude?: string[];
    }
    namespace Log {
        interface Metadata {
            /**
             * Defines the log in ECS format. If the defined log matches a property used in conversions it will be displayed instead.
             */
            ecs?: ECS.Fields | undefined;
            /**
             * Defines the list of fields that should only be excluded from that log. E.g: ["http.request.headers.authorization", "http.request.body.content"].
             */
            exclude?: string[];
            /**
             * Defines an error to be transpiled in the log. E.g.: error: new Error("foo").
             */
            error?: any;
        }
        interface Metadata {
            req?: Request;
            res?: Response;
        }
    }
}