Irc client in dart with null safety

main.dart

import 'dart:convert';

import "package:irc/client.dart";
import "dart:io";

// This stores our configuration for this client
var config = Configuration(
    host: "irc.dot.org.es",
    port: 6697,
    ssl: true,
    nickname: "DartBot",
    username: "DartBot");
// "Primary" IRC class
var client = Client(config);

main() async {
  // Register an onReady event handler
  client.onReady.listen((event) {
    // Join a channel
    event.join("#romanian");
  });

  client.onClientJoin.listen((event) async {
    var lines = stdin.transform(utf8.decoder).transform(const LineSplitter());
    // Loop sending messages
    stdout.write(">> ");
    await for (final l in lines) {
      client.sendMessage("#romanian", l);
      stdout.write(">> ");
    }
  });

  // Register an onMessage event handler
  client.onMessage.listen((event) {
    // Log any message events to the console
    print("<${event.target!.name}><${event.from?.name}> ${event.message}");
    stdout.write(">> ");
  });

  // Connect to the server
  await client.connect();
}

pubspec.yaml

name: irctest
description: A sample command-line application.
version: 1.0.0
# homepage: https://www.example.com

environment:
  sdk: '>=2.17.0 <3.0.0'

dependencies:
  irc:
      git:
        url: https://github.com/ostafen/irc.dart
        ref: flutter

dev_dependencies:
  lints: ^2.0.0
  test: ^1.16.0