Add this in your pubspec.yaml file.

  dependencies:    tezster_dart: ^2.1.1

web setup

Download the Sodium.js.

  flutter-project
    -lib/
    -pubspec.yaml
    ...
    -web/
      -sodium.js // here
      -index.js

and add it to your flutter web directory. Then in your web/index.html add

<head>    ...<script src="sodium.js"></script></head>

Import it

Now in your Dart code, you can use:

import 'package:tezster_dart/tezster_dart.dart';

Tezster dart