NIP-44 Dart Library

A Dart implementation of NIP-44, providing encryption and decryption functionalities for the Nostr protocol.

Table of Contents

• Introduction
• Features
• Installation
• Usage
  • Encrypting a Message
  • Decrypting a Message
• Examples
• API Reference
• Contributing
• License

Introduction

NIP-44 specifies a protocol for end-to-end encrypted messages in the Nostr network. This library provides Dart developers with an easy-to-use interface to implement NIP-44 encryption and decryption in their applications.

Features

• Encrypt messages according to the NIP-44 specification.
• Decrypt messages encrypted with NIP-44.
• Generate conversation keys using Elliptic Curve Diffie-Hellman (ECDH).
• Compatible with other NIP-44 implementations in different languages.

Installation

Add the following to your pubspec.yaml:

dependencies:
  nip44:
    git:
      url: https://github.com/chebizarro/dart-nip44.git
      ref: master

Then run:

dart pub get

Usage

Import the Package

import 'package:nip44/nip44.dart';

Encrypting a Message

import 'package:nip44/nip44.dart';

void main() async {
  String plaintext = 'Hello, Nostr!';
  String senderPrivateKey = 'your_private_key_hex';
  String recipientPublicKey = 'recipient_public_key_hex';

  String encryptedMessage = await Nip44.encryptMessage(
    plaintext,
    senderPrivateKey,
    recipientPublicKey,
  );

  print('Encrypted Message: $encryptedMessage');
}

Decrypting a Message

import 'package:nip44/nip44.dart';

void main() async {
  String encryptedMessage = 'encrypted_message_from_sender';
  String recipientPrivateKey = 'your_private_key_hex';
  String senderPublicKey = 'sender_public_key_hex';

  String decryptedMessage = await Nip44.decryptMessage(
    encryptedMessage,
    recipientPrivateKey,
    senderPublicKey,
  );

  print('Decrypted Message: $decryptedMessage');
}

Examples

You can find more examples in the example directory.

API Reference

Nip44 Class

• encryptMessage(String plaintext, String senderPrivateKey, String recipientPublicKey)

  Encrypts a plaintext message using the NIP-44 specification.

• decryptMessage(String encryptedMessage, String recipientPrivateKey, String senderPublicKey)

  Decrypts an encrypted message using the NIP-44 specification.

Contributing

Contributions are welcome! Please read the contribution guidelines first.

License

This project is licensed under the MIT License - see the LICENSE file for details.