import { SocketTransport } from '../transport.js';
/**
 * One connection on the server, speaking typed JSON. The mirror image of
 * `JsonSocket`: `TIn` is what the client sends, `TOut` is what you send back.
 *
 * This was `NiceSocket`, and it used to `extend` the `ws` `WebSocket` class —
 * which meant `NiceSocketServer` could not simply construct one (the instances
 * come from `ws`, already built) and grafted the two methods onto each incoming
 * socket with `Object.create(ws, {…descriptors})`. Taking the transport as a
 * constructor argument instead removes both the inheritance and the hack.
 */
export declare class JsonConnection<TIn = any, TOut = any> {
    private readonly transport;
    private readonly emitMessage;
    readonly onMessage: (listener: (data: TIn) => void) => () => boolean;
    private readonly emitClose;
    readonly onClose: (listener: (data: void) => void) => () => boolean;
    constructor(transport: SocketTransport);
    send(value: TOut): void;
    close(): void;
    private processMessage;
}
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