export type LogBufferOptions = {
    byteLimit?: number;
};
export type WriteBufferedLogsOptions = {
    dir: string;
    filenamePrefix: string;
    maxFiles?: number;
};
/**
 * In-memory ring buffer of log entries with a byte cap. Designed to be
 * composed into a logger so that recent log output can be flushed to a file
 * after a failure. Each record is timestamped and tagged with the level the
 * caller provides.
 */
export declare class LogBuffer {
    private entries;
    private bytes;
    private byteLimit;
    constructor(options?: LogBufferOptions);
    private static entrySize;
    private trimToByteLimit;
    record(level: string, args: unknown[]): void;
    view(): string;
    flush(): string;
    writeToFile(options: WriteBufferedLogsOptions): string | null;
}