import { Logform } from 'winston';
import Transport, { type TransportStreamOptions } from 'winston-transport';
export interface CloudWatchTransportOptions extends TransportStreamOptions {
    logGroupName?: string;
    logStreamName?: string;
    uploadRate?: number;
    bufferSize?: number;
}
/**
 * Declaring the constants
 */
export declare class CloudWatchTransport extends Transport {
    private readonly cloudWatchLogs;
    private readonly logGroupName;
    private readonly logStreamName;
    private readonly uploadRate;
    private readonly bufferSize;
    private timeout;
    private logEvents;
    private isStreamPresent;
    constructor(opts?: CloudWatchTransportOptions);
    private add;
    private checkStream;
    private flush;
    addFormat(...formats: Logform.Format[]): this;
    log(info: object, next: () => void): void;
    close(): Promise<void>;
}