/**
 * @see https://github.com/nats-io/nats.js
 *
 * @publicApi
 */
export interface NatsCodec<T> {
    encode(d: T): Uint8Array;
    decode(a: Uint8Array): T;
}
interface RequestOptions {
    timeout: number;
    headers?: any;
    noMux?: boolean;
    reply?: string;
}
interface PublishOptions {
    reply?: string;
    headers?: any;
}
interface SubOpts<T> {
    queue?: string;
    max?: number;
    timeout?: number;
    callback?: (err: object | null, msg: T) => void;
}
declare type SubscriptionOptions = SubOpts<NatsMsg>;
export interface NatsMsg {
    subject: string;
    sid: number;
    reply?: string;
    data: Uint8Array;
    headers?: any;
    respond(data?: Uint8Array, opts?: PublishOptions): boolean;
}
interface Sub<T> extends AsyncIterable<T> {
    unsubscribe(max?: number): void;
    drain(): Promise<void>;
    isDraining(): boolean;
    isClosed(): boolean;
    callback(err: object | null, msg: NatsMsg): void;
    getSubject(): string;
    getReceived(): number;
    getProcessed(): number;
    getPending(): number;
    getID(): number;
    getMax(): number | undefined;
}
declare type Subscription = Sub<NatsMsg>;
declare enum Events {
    Disconnect = "disconnect",
    Reconnect = "reconnect",
    Update = "update",
    LDM = "ldm",
    Error = "error"
}
interface Status {
    type: Events | DebugEvents;
    data: string | number;
}
declare enum DebugEvents {
    Reconnecting = "reconnecting",
    PingTimer = "pingTimer",
    StaleConnection = "staleConnection"
}
export declare class Client {
    info?: Record<string, any>;
    closed(): Promise<void | Error>;
    close(): Promise<void>;
    publish(subject: string, data?: Uint8Array, options?: PublishOptions): void;
    subscribe(subject: string, opts?: SubscriptionOptions): Subscription;
    request(subject: string, data?: Uint8Array, opts?: RequestOptions): Promise<NatsMsg>;
    flush(): Promise<void>;
    drain(): Promise<void>;
    isClosed(): boolean;
    isDraining(): boolean;
    getServer(): string;
    status(): AsyncIterable<Status>;
    stats(): Record<string, any>;
    jetstreamManager(opts?: Record<string, any>): Promise<any>;
    jetstream(opts?: Record<string, any>): any;
}
export {};