import { MetaLog } from './metaLog';
import { Config } from './config';
export declare abstract class Logger {
    /**
     * Logger config.
     *
     * @protected
     */
    protected config: Config;
    /**
     * Logger constructor.
     *
     * @param config
     */
    constructor(config: Config);
    /**
     * Log a info.
     *
     * @param message
     * @param meta
     * @returns {Promise<void>}
     */
    abstract info(message: string, meta?: MetaLog): Promise<void>;
    /**
     * Log a warn.
     *
     * @param message
     * @param meta
     * @returns {Promise<void>}
     */
    abstract warn(message: string, meta?: MetaLog): Promise<void>;
    /**
     * Log a error.
     *
     * @param message
     * @param meta
     * @returns {Promise<void>}
     */
    abstract error(message: string, meta?: MetaLog): Promise<void>;
}