Client is a wrapper of a session to send requests and notifications.

import { assert, is } from "https://deno.land/x/unknownutil@v3.2.0/mod.ts";
import { channel } from "https://deno.land/x/streamtools@v0.5.0/mod.ts";
import { Session, Client } from "./mod.ts";

const input = channel<Uint8Array>();
const output = channel<Uint8Array>();
const session = new Session(input.reader, output.writer);
session.dispatcher = {
  sum(x, y) {
    assert(x, is.Number);
    assert(y, is.Number);
    return x + y;
  },
};
session.start();

// Create a client
const client = new Client(session);

// Send a request and wait for the response.
console.log(await client.call("sum", 1, 2)); // 3

// Send a notification and do not wait for the response.
console.log(client.notify("sum", 1, 2)); // undefined