import { ChainForkConfig } from "@lodestar/config";
import { LoggerNodeOpts } from "@lodestar/logger/node";
import { GlobalArgs } from "../options/globalOptions.js";
import { LogArgs } from "../options/logOptions.js";
export declare const LOG_FILE_DISABLE_KEYWORD = "none";
/**
 * Setup a CLI logger, common for beacon, validator and dev commands
 */
export declare function parseLoggerArgs(args: LogArgs & Pick<GlobalArgs, "dataDir">, paths: {
    defaultLogFilepath: string;
}, config: ChainForkConfig, opts?: {
    hideTimestamp?: boolean;
}): LoggerNodeOpts;
/**
 * Winston is not able to clean old log files if server is offline for a while
 * so we have to do this manually when starting the node.
 * See https://github.com/ChainSafe/lodestar/issues/4419
 */
export declare function cleanOldLogFiles(args: LogArgs, paths: {
    defaultLogFilepath: string;
}): void;
export declare function shouldDeleteLogFile(prefix: string, extension: string, logFileName: string, maxFiles: number): boolean;
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