用C#开发自己的比特币钱包

在这个教程中，我们将使用C#来开发一个比特币钱包，我们使用NBitcoin这个库。教程中的代码实现了比特币的存储、接收和支付功能，可以很容易地移植到其他应用中。

如果要快速掌握NBitcoin的使用方法，推荐访问汇智网的课程：

• C#比特币开发详解

开发目标

我们要开发的比特币钱包要实现以下功能：

• 可以使用BIP39助记词恢复密钥
• 可以创建比特地址，可以接收其他地址转来的比特币
• 可以查看比特币地址余额
• 可以向其他地址支付比特币

引入NBitcoin开发包

首先需要引入NBitcoin开发包以及QBitNinja开发包：

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

生成BIP39助记词

我们需要保存下来生成的助记词：

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

生成比特币地址

下面的代码可以利用NBitcoin生成比特币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();}

获取比特币地址余额

下面的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));  }}

向其他比特币地址转账

下面的代码可以利用NBitcoin实现向指定的地址转账比特币：

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：Step by step guide to programming your own bitcoin wallet

汇智网翻译整理，转载请标明出处。