import { ConnectionOptions, NatsConnection, SubscriptionOptions } from 'nats';
import { MessageTransport, RequestMessage, ResponseMessage } from '../MessageTransport';
export interface NATSTransportConnectionOptions extends ConnectionOptions {
    monitorUrl?: string;
    /**
     * Sets the maximum count of per-server initial connect attempts before giving up
     * and throwing an error.
     * Set to `-1` to never give up.
     *
     * @default 1
     */
    maxConnectAttempts?: number;
    /**
     * Set the number of millisecods between initial connect attempts.
     *
     * @default 2000 millis
     */
    connectTimeWait?: number;
}
interface NATSConnection {
    name?: string;
    lang: string;
    version: string;
    subscriptions: number;
    uptime: string;
    ip: string;
    cid: number;
    port: number;
    rtt: string;
}
type SubjectResolver<T, R> = (message: RequestMessage<T> | ResponseMessage<R>) => string;
interface NATSTransportOptions<T, R> {
    subscriptions: (string | {
        subject: string;
        options: SubscriptionOptions;
    })[];
    publishSubject: string | SubjectResolver<T, R>;
}
export declare class NATSTransport<T, R> implements MessageTransport<T, R> {
    static create<T, R>(config: NATSTransportConnectionOptions, options: NATSTransportOptions<T, R>): Promise<NATSTransport<T, R>>;
    private config;
    readonly nc: NatsConnection;
    private options;
    private maxPayload;
    private receiveHandler?;
    private subjectById;
    private chunkedMessages;
    private constructor();
    close(): Promise<void>;
    getConnections(): Promise<NATSConnection[]>;
    send(message: RequestMessage<T> | ResponseMessage<R>): Promise<void>;
    onReceive(receiveHandler: (message: RequestMessage<T> | ResponseMessage<R>) => void): void;
    private marshall;
    private unmarshall;
    private initialize;
    /**
     * |----- ? bytes -----|| 16 ||  1  ||  1  |
     * [CHUNK_HEADER_PREFIX][uuid][index][total]
     */
    private sendMessageInChunks;
    private receiveMessageChunk;
}
export {};