用C#開發自己的比特幣錢包

C# 區塊鏈開發 · 發表 2019-04-24 16:30:40

摘要：在這個教程中，我們將使用C#來開發一個比特幣錢包，我們使用 NBitcoin這個庫。教程中的程式碼實現了比特幣的儲存、接收和支付功能，可以很容易地移植到其他應用中。如果要快速掌握NBitcoin的使用方法，推薦訪問匯智網的課程： C#比...

在這個教程中，我們將使用C#來開發一個比特幣錢包，我們使用 NBitcoin這個庫。教程中的程式碼實現了比特幣的儲存、接收和支付功能，可以很容易地移植到其他應用中。

如果要快速掌握NBitcoin的使用方法，推薦訪問匯智網的課程：

C#比特幣開發詳解

開發目標

我們要開發的比特幣錢包要實現以下功能：

可以使用BIP39助記詞恢復金鑰
可以建立位元地址，可以接收其他地址轉來的比特幣
可以檢視比特幣地址餘額
可以向其他地址支付比特幣

引入NBitcoin開發包

首先需要引入NBitcoin開發包以及QBitNinja開發包：

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

生成BIP39助記詞

我們需要儲存下來生成的助記詞：

public void MssGenerateMnemo(out string ssMnemo) {

Mnemonic mnemonic = new Mnemonic(Wordlist.English, WordCount.Twelve);

ssMnemo = mnemonic.ToString();

}

生成比特幣地址

下面的程式碼可以利用NBitcoin生成比特幣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();

}

獲取比特幣地址餘額

下面的程式碼可以獲取指定地址的比特幣餘額：

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<Coin>();
var unspentCoinsConfirmed = new List<Coin>();
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));
}

}

向其他比特幣地址轉賬

下面的程式碼可以利用NBitcoin實現向指定的地址轉賬比特幣：

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<Coin>();
var unspentCoinsConfirmed = new List<Coin>();
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

匯智網翻譯整理，轉載請標明出處