import type { Logger, LogLevel } from '@webpieces/core-util';
import type { Logger as WinstonBase } from 'winston';
/**
 * webpieces LogLevel → winston level name. webpieces `trace` has no native
 * winston counterpart, so it maps onto winston `silly` (the finest npm level);
 * both resolve to GCP severity DEBUG via LEVEL_TO_SEVERITY.
 */
export declare const LEVEL_TO_WINSTON: Record<LogLevel, string>;
/**
 * WinstonLogger - a webpieces {@link Logger} backed by a winston logger instance
 * (one per name, created as a winston child carrying `loggerName`). Context
 * enrichment is done by the shared winston formats (see format.ts), so this
 * wrapper only maps the 5 webpieces levels and spreads an optional Error into
 * `errName`/`errMessage`/`errStack` — matching the production-tested logger's behaviour.
 */
export declare class WinstonLogger implements Logger {
    private readonly winston;
    constructor(winston: WinstonBase);
    trace(message: string, err?: Error): void;
    debug(message: string, err?: Error): void;
    info(message: string, err?: Error): void;
    warn(message: string, err?: Error): void;
    error(message: string, err?: Error): void;
    private emit;
}