import { LogLevel } from './constants/LogLevel';
import { Formatter } from './formatter/Formatter';
import { Logger } from './Logger';
/**
 * Logging metadata passed to all transports and formatters
 */
export interface LogMeta {
    /**
     * The instance of the [[Logger]] that initiated the current logging call.
     */
    readonly origin: Logger;
    /**
     * The [[LogLevel]] of the message.
     */
    readonly level: Exclude<LogLevel, LogLevel.OFF>;
    /**
     * The optional uniqueMarker used to denote multiple instance.
     */
    readonly uniqueMarker?: string;
    /**
     * The input message. This can either be a string or an Error.
     */
    readonly input: string | Error | Object;
    /**
     * An optional object of key value pairs with extra data (Can be used for a central logging system for example).
     */
    readonly extra?: Readonly<{
        [key: string]: any;
    }>;
}
/**
 * @ignore
 */
export declare const LOG_META_FORMATTER_MAP_SYMBOL: unique symbol;
/**
 * @ignore
 */
export interface InternalLogMeta extends LogMeta {
    [LOG_META_FORMATTER_MAP_SYMBOL]: Map<Formatter, string>;
}