用C#開發自己的比特幣錢包
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:
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
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