比特币钱包开发 [C#]

在本教程中，我们将使用 C# 开发比特币钱包比特币钱包要经常备份吗比特币钱包要经常备份吗，我们使用 NBitcoin 库。 教程中的代码实现了比特币的存储、接收和支付功能，可以方便地移植到其他应用中。

如果想快速掌握NBitcoin在C#程序中的使用，推荐访问汇智网的课程：

一、发展目标

我们要开发的比特币钱包应该实现以下功能：

2.引入NBitcoin开发包

首先需要介绍一下NBitcoin开发包和QBitNinja开发包：

using NBitcoin;
using QBitNinja.Client;
using QBitNinja.Client.Models;

3.生成BIP39助记词

我们需要保存生成的助记词：

public void MssGenerateMnemo(out string ssMnemo) {
Mnemonic mnemonic = new Mnemonic(Wordlist.English, WordCount.Twelve);
ssMnemo = mnemonic.ToString();
}

4.生成比特币地址

下面的代码可以使用NBitcoin生成一个Bitcoin HD地址：

public void MssGenerateAddress(

		string ssMnemo, 
		int ssKeynumber, 
		bool ssIsTestNet, 
		out string ssAddress, 
		out string ssPrivateKey) {
  Network net;
  if (ssIsTestNet)
      net = Network.TestNet;
  else
      net = Network.Main;
  Mnemonic restoreNnemo = new Mnemonic(ssMnemo);
  ExtKey masterKey = restoreNnemo.DeriveExtKey();
  KeyPath keypth = new KeyPath("m/44'/0'/0'/0/" + ssKeynumber);
  ExtKey key = masterKey.Derive(keypth);

  ssAddress = key.PrivateKey.PubKey.GetAddress(net).ToString();
  ssPrivateKey = key.PrivateKey.GetBitcoinSecret(net).ToString();
}

5.获取比特币地址余额

以下代码可以获取指定地址的比特币余额：

public void MssGetBalance(
		string ssAddress, 
		bool ssIsUnspentOnly, 
		bool ssIsTestNet, 
		out decimal ssBalance, 
		out decimal ssConfirmedBalance) {
  Network net;
  if (ssIsTestNet)
    net = Network.TestNet;
  else
    net = Network.Main;

  QBitNinjaClient client = new QBitNinjaClient(net);
  var balance = client.GetBalance(new BitcoinPubKeyAddress(ssAddress), ssIsUnspentOnly).Result;
  ssBalance = 0.0M;
  ssConfirmedBalance = 0.0M;
  if (balance.Operations.Count > 0)
  {
    var unspentCoins = new List();
    var unspentCoinsConfirmed = new List();    
    foreach (var operation in balance.Operations)
    {
        unspentCoins.AddRange(operation.ReceivedCoins.Select(coin => coin as Coin));
        if(operation.Confirmations > 0)
            unspentCoinsConfirmed.AddRange(operation.ReceivedCoins.Select(coin => coin as Coin));
    }
    ssBalance = unspentCoins.Sum(x => x.Amount.ToDecimal(MoneyUnit.BTC));

    ssConfirmedBalance = unspentCoinsConfirmed.Sum(x => x.Amount.ToDecimal(MoneyUnit.BTC));
  }
}

6. 转移到其他比特币地址

下面的代码可以使用NBitcoin将比特币转账到指定地址：

public void MssGetBalance(
		string ssAddress, bool ssIsUnspentOnly, 
		bool ssIsTestNet, 
		out decimal ssBalance, out decimal ssConfirmedBalance) {
  Network net;
  if (ssIsTestNet)
      net = Network.TestNet;
  else
      net = Network.Main;
  QBitNinjaClient client = new QBitNinjaClient(net);
  var balance = client.GetBalance(new BitcoinPubKeyAddress(ssAddress), ssIsUnspentOnly).Result;

  ssBalance = 0.0M;
  ssConfirmedBalance = 0.0M;
  if (balance.Operations.Count > 0)
  {
    var unspentCoins = new List();
    var unspentCoinsConfirmed = new List();    
    foreach (var operation in balance.Operations)
    {
      unspentCoins.AddRange(operation.ReceivedCoins.Select(coin => coin as Coin));
      if(operation.Confirmations > 0)
          unspentCoinsConfirmed.AddRange(operation.ReceivedCoins.Select(coin => coin as Coin));
    }
    ssBalance = unspentCoins.Sum(x => x.Amount.ToDecimal(MoneyUnit.BTC));
    ssConfirmedBalance = unspentCoinsConfirmed.Sum(x => x.Amount.ToDecimal(MoneyUnit.BTC));
  }
}

原文链接：用C#开发自己的比特币钱包——汇智网