Flutter高性能绘图插件nanodart的使用

NanoDart 是一个用于 Dart 编程语言的 Nano 和 Banano 加密货币库。它支持种子生成、密钥派生、验证器、签名、块创建等功能。

特性

NanoDart 支持以下功能：

• 种子生成
• 密钥派生
• 验证器
• 签名
• 块创建
• 其他 Nano 和 Banano 加密货币的基本功能

使用方法

下面是一个完整的示例代码，展示如何在 Flutter 应用中使用 NanoDart 进行基本的操作：

示例 Demo

import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:nanodart/nanodart.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'NanoDart Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String seed = '';
  String privateKey = '';
  String publicKey = '';
  String address = '';

  @override
  void initState() {
    super.initState();
    generateSeed();
  }

  void generateSeed() {
    setState(() {
      // Generating a random seed
      seed = NanoSeeds.generateSeed(); 
      // Getting private key at index-0 of this seed
      privateKey = NanoKeys.seedToPrivate(seed, 0);
      // Getting public key from this private key
      publicKey = NanoKeys.createPublicKey(privateKey);
      // Getting address (nano_, ban_) from this pubkey
      address = NanoAccounts.createAccount(NanoAccountType.NANO, publicKey);
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('NanoDart Example'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('Seed: $seed'),
            Text('Private Key: $privateKey'),
            Text('Public Key: $publicKey'),
            Text('Address: $address'),
            ElevatedButton(
              onPressed: () {
                generateSeed();
              },
              child: Text('Generate New Seed'),
            ),
          ],
        ),
      ),
    );
  }
}

创建和签署块

void createAndSignBlock() {
  int accountType = NanoAccountType.NANO;
  String account = 'xrb_3igf8hd4sjshoibbbkeitmgkp1o6ug4xads43j6e4gqkj5xk5o83j8ja9php';
  String previous = '0';
  String representative = 'xrb_3p1asma84n8k84joneka776q4egm5wwru3suho9wjsfyuem8j95b3c78nw8j';
  BigInt balance = BigInt.parse('1');
  String link = '1EF0AD02257987B48030CC8D38511D3B2511672F33AF115AD09E18A86A8355A8';
  
  // Creating a block
  String calculatedHash = NanoBlocks.computeStateHash(accountType, account, previous, representative, balance, link);
  
  // Signing a block
  String signature = NanoSignatures.signBlock(calculatedHash, privateKey);
  
  print('Signature: $signature');
}

加密和解密种子

void encryptAndDecryptSeed() {
  // Encrypting and decrypting a seed
  Uint8List encrypted = NanoCrypt.encrypt(seed, 'thisisastrongpassword');
  // String representation:
  String encryptedSeedHex = NanoHelpers.byteToHex(encrypted);
  
  // Decrypting (if incorrect password, will throw an exception)
  Uint8List decrypted = NanoCrypt.decrypt(NanoHelpers.hexToBytes(encryptedSeedHex), 'thisisastrongpassword');
  
  String decryptedSeed = NanoHelpers.byteToAscii(decrypted);
  print('Decrypted Seed: $decryptedSeed');
}