private static void GenerateIdentity(int keySize = 256)
{
ECKeyPairGenerator gen = new ECKeyPairGenerator();
SecureRandom secureRandom = new SecureRandom();
KeyGenerationParameters keyGenParam =
new KeyGenerationParameters(secureRandom, keySize);
gen.Init(keyGenParam);
var keyPair = gen.GenerateKeyPair();
BigInteger privateKey = ((ECPrivateKeyParameters)keyPair.Private).D;
Console.WriteLine("Private key (hex): " + privateKey.ToString(16));
Console.WriteLine("Private key: " + privateKey.ToString(10));
Console.WriteLine("Password for private key encryption:");
var password = Console.ReadLine();
var encryptedPrivateKey = CryptographyUtilities.Encrypt(privateKey.ToByteArray(), password);
StorageFileProvider <string> .SetModel(Constants.WalletEncryptedPrivateKeyFilePath, encryptedPrivateKey);
ECPoint pubKey = ((ECPublicKeyParameters)keyPair.Public).Q;
string pubKeyCompressed = CryptographyUtilities.EncodeECPointHexCompressed(pubKey);
Console.WriteLine("Public key (compressed): " + pubKeyCompressed);
string addr = CryptographyUtilities.CalcRipeMD160(pubKeyCompressed);
Console.WriteLine("Blockchain address: " + addr);
}
public static void UnlockWallet()
{
if (privateKey == null)
{
var encryptedPrivateKey = StorageFileProvider <string> .GetModel(Constants.WalletEncryptedPrivateKeyFilePath);
if (encryptedPrivateKey != null && encryptedPrivateKey != string.Empty)
{
Console.WriteLine("Type your password:"******"Unlock wallet...");
var bytes = CryptographyUtilities.Decrypt(encryptedPrivateKey, password);
if (bytes != null && bytes.Length > 0)
{
privateKey = new BigInteger(bytes);
}
break;
}
catch
{
Console.WriteLine("Incorrect password...");
Console.WriteLine("Type your password again:");
password = Console.ReadLine();
}
}
}
}
}
public static async Task <(string OriginName, string NewPath)> SaveAsync(this IFormFile formFile,
string interval = "upload")
{
await using var stream = new MemoryStream();
await formFile.CopyToAsync(stream);
var bytes = stream.ToArray();
var extension = Path.GetExtension(formFile.FileName);
var md5 = CryptographyUtilities.ComputeMD5(bytes);
var fileName = $"{md5}{extension}";
var date = $"{DateTime.Now:yyyMMdd}";
var path = $"{interval}/{date}";
var directory = Path.Combine(AppContext.BaseDirectory, $"wwwroot/{path}");
if (!Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
var filePath = Path.Combine(directory, fileName);
if (!File.Exists(filePath))
{
await File.WriteAllBytesAsync(filePath, bytes);
}
return(formFile.FileName, $"{path}/{fileName}");
}
public bool ValidateInput(string[] args)
{
string lastBlockHash = this.blockchain.LastBlock.BlockHash;
int nonce = int.Parse(args[1]);
string winnerHash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256($"{lastBlockHash}{nonce}"));
if (!winnerHash.ToCharArray().Take(this.blockchain.Difficulty).All(s => s == '0'))
{
Console.WriteLine("Incorrect hash...");
return(false);
}
return(true);
}
public void Run(string[] args)
{
if (this.walletProvider.HasWallet())
{
Console.WriteLine("-------------------------");
Console.WriteLine($"Address: {this.walletProvider.Address}");
Console.WriteLine($"Public key: {CryptographyUtilities.BytesToHex(this.walletProvider.PublicKey.GetEncoded())}");
Console.WriteLine("-------------------------");
Console.WriteLine("Transaction history");
PrintTransactionHistory(this.walletProvider.Address);
}
else
{
Console.WriteLine("None wallet found...");
}
}
public Block AddBlock(int nonce, WalletProvider walletProvider)
{
string lastBlockHash = this.LastBlock.BlockHash;
string winnerHash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256($"{lastBlockHash}{nonce}"));
if (!winnerHash.ToCharArray().Take(this.Difficulty).All(s => s == '0'))
{
Console.WriteLine("Incorrect winner hash...");
return(null);
}
var transactions = this.pendingTransactions;
foreach (var transaction in transactions)
{
transaction.DateReceived = DateTime.Now;
transaction.MinedInBlockIndex = this.LastBlock.Index + 1;
}
var block = new Block()
{
Index = this.LastBlock.Index + 1,
DateCreated = DateTime.Now,
Difficulty = this.Difficulty,
MinedBy = walletProvider.Address,
Nonce = nonce,
PreviousBlockHash = this.LastBlock.BlockHash,
Transactions = transactions.ToList()
};
string blockJson = JsonConvert.SerializeObject(block);
var blockHash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256(blockJson));
block.BlockHash = blockHash;
this.blocks.Add(block);
StorageFileProvider <Block> .SetModel($"{Constants.BlocksFilePath}/block_{block.Index}.json", block);
//Shoud think :-)
this.pendingTransactions = new List <Transaction>();
StorageFileProvider <Transaction[]> .SetModel(Constants.PendingTransactionsFilePath, this.pendingTransactions.ToArray());
return(block);
}
private void CalculateBalances(int confirmations)
{
var balances = new Dictionary <string, decimal>();
foreach (var genesisTransactions in blocks[0].Transactions)
{
balances.Add(genesisTransactions.To, genesisTransactions.Value);
}
foreach (var block in blocks.Skip(1).Take(blocks.Count - confirmations))
{
if (block.Index == 0)
{
continue;
}
foreach (var transaction in block.Transactions)
{
var senderPublicKey = CryptographyUtilities.DecodeECPointFromHex(transaction.SenderPublicKey);
var bytes = Encoding.UTF8.GetBytes(transaction.TransactionHash);
if (CryptographyUtilities.VerifySigniture(bytes, transaction.SenderSignature, senderPublicKey))
{
balances[transaction.From] -= transaction.Value;
if (balances.ContainsKey(transaction.To))
{
balances[transaction.To] += transaction.Value;
}
else
{
balances.Add(transaction.To, transaction.Value);
}
}
else
{
Console.WriteLine("Found incorrect signiture...");
return;
}
}
}
this.balances = balances;
}
public static void UnlockWallet()
{
if (privateKey == null)
{
var encryptedPrivateKey = StorageFileProvider <string> .GetModel(Constants.WalletEncryptedPrivateKeyFilePath);
if (encryptedPrivateKey != null && encryptedPrivateKey != string.Empty)
{
var password = "******";
var bytes = CryptographyUtilities.Decrypt(encryptedPrivateKey, password);
if (bytes != null && bytes.Length > 0)
{
privateKey = new BigInteger(bytes);
}
}
}
}
public void CreateGenesis()
{
var genesisBlock = new Block();
genesisBlock.Index = 0;
genesisBlock.DateCreated = DateTime.Now;
genesisBlock.Difficulty = 0;
genesisBlock.MinedBy = "GENESIS";
genesisBlock.Nonce = 0;
genesisBlock.PreviousBlockHash = "GENESIS";
var transaction = new Transaction()
{
From = "GENESIS",
To = "e39f2a9daf79084f96b28d0b92439b0b6112981c",
Value = 1000000000000000,
SenderPublicKey = null,
SenderSignature = null
};
string transactionJson = JsonConvert.SerializeObject(transaction);
var transactionHash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256(transactionJson));
transaction.TransactionHash = transactionHash;
transaction.DateReceived = DateTime.Now;
genesisBlock.Transactions = new List <Transaction>();
genesisBlock.Transactions.Add(transaction);
string blockJson = JsonConvert.SerializeObject(genesisBlock);
var blockHash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256(blockJson));
genesisBlock.BlockHash = blockHash;
string path = $"{Constants.BlocksFilePath}/block_0.json";
StorageFileProvider <Block> .SetModel(path, genesisBlock);
this.blocks.Add(genesisBlock);
}
public Transaction AddTransaction(string from, string to, decimal amount, IWalletProvider walletProvider)
{
this.CalculateBalances(0);
if (balances.ContainsKey(from) && balances[from] < amount)
{
Console.WriteLine("Not enought coins...");
return(null);
}
var publicKeyHex = CryptographyUtilities.BytesToHex(walletProvider.PublicKey.GetEncoded());
var transaction = new Transaction()
{
From = from,
To = to,
Value = amount,
SenderPublicKey = publicKeyHex
};
string transactionJson = JsonConvert.SerializeObject(transaction, new JsonSerializerSettings()
{
ReferenceLoopHandling = ReferenceLoopHandling.Ignore
});
var transactionHash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256(transactionJson));
var signiture = walletProvider.SignTransaction(Encoding.UTF8.GetBytes(transactionHash));
transaction.TransactionHash = transactionHash;
transaction.SenderSignature = signiture;
this.pendingTransactions.Add(transaction);
StorageFileProvider <Transaction[]> .SetModel(Constants.PendingTransactionsFilePath, this.pendingTransactions.ToArray());
Console.WriteLine("Transaction is pending...");
return(transaction);
}
public byte[] SignTransaction(byte[] data)
{
var signiture = CryptographyUtilities.SignData(privateKey, data);
return(signiture);
}
public bool ValidateBlock(Block block, IDictionary <string, decimal> futureBalances = null)
{
Console.WriteLine("Validate block...");
int nonce = block.Nonce;
string lastBlockHash = this.LastBlock.BlockHash;
string winnerHash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256($"{lastBlockHash}{nonce}"));
if (!winnerHash.ToCharArray().Take(this.Difficulty).All(s => s == '0'))
{
Console.WriteLine("^^^^^^^^^^^^^^^^^^^^^^^^^");
Console.WriteLine("Block validation failed...");
Console.WriteLine("INFO -> Incorrect winner hash...");
Console.WriteLine($"Block number: {block.Index}, last block: {this.LastBlock.Index}");
return(false);
}
var copyOfBlock = new Block()
{
Index = block.Index,
DateCreated = block.DateCreated,
Difficulty = block.Difficulty,
MinedBy = block.MinedBy,
Nonce = block.Nonce,
PreviousBlockHash = block.PreviousBlockHash,
Transactions = block.Transactions
};
string blockJson = JsonConvert.SerializeObject(copyOfBlock);
var blockHash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256(blockJson));
if (blockHash != block.BlockHash)
{
Console.WriteLine("^^^^^^^^^^^^^^^^^^^^^^^^^");
Console.WriteLine("Block validation failed...");
Console.WriteLine("INFO -> Incorrect block hash...");
return(false);
}
IDictionary <string, decimal> balances;
if (futureBalances != null)
{
balances = futureBalances;
}
else
{
balances = GetBalances(0);
}
foreach (var transaction in block.Transactions)
{
if (!ValidateTransaction(transaction, balances))
{
return(false);
}
}
return(true);
}
private bool ValidateTransaction(Transaction transaction, IDictionary <string, decimal> futureBalances = null)
{
IDictionary <string, decimal> balances;
bool inSimulationMode = false;
if (futureBalances != null)
{
inSimulationMode = true;
balances = futureBalances;
}
else
{
balances = GetBalances(0);
}
var bytes = Encoding.UTF8.GetBytes(transaction.TransactionHash);
ECPoint senderPublicKey = CryptographyUtilities.DecodeECPointFromHex(transaction.SenderPublicKey);
if (!CryptographyUtilities.VerifySigniture(bytes, transaction.SenderSignature, senderPublicKey))
{
Console.WriteLine("^^^^^^^^^^^^^^^^^^^^^^^^^");
Console.WriteLine("Transaction validation failed...");
Console.WriteLine("INFO -> incorrect signiture...");
return(false);
}
if (!balances.ContainsKey(transaction.From) || balances[transaction.From] < transaction.Value)
{
Console.WriteLine("^^^^^^^^^^^^^^^^^^^^^^^^^");
Console.WriteLine("Transaction validation failed...");
Console.WriteLine("INFO -> not enought money of sender...");
return(false);
}
if (inSimulationMode)
{
balances[transaction.From] -= transaction.Value;
}
var copyOftransaction = new Transaction()
{
From = transaction.From,
To = transaction.To,
Value = transaction.Value,
SenderPublicKey = transaction.SenderPublicKey
};
var transactionJson = JsonConvert.SerializeObject(copyOftransaction);
var transactionHash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256(transactionJson));
if (transactionHash != transaction.TransactionHash)
{
Console.WriteLine("^^^^^^^^^^^^^^^^^^^^^^^^^");
Console.WriteLine("Transaction validation failed...");
Console.WriteLine("INFO -> incorrect transaction hash...");
return(false);
}
Console.WriteLine("Transaction validation success...");
return(true);
}
public void Receive(SocketDataBody data)
{
Console.WriteLine($"{data.NodesPair.Item1} -> {data.NodesPair.Item2}");
if (data.Type == SocketDataType.Send)
{
var block = JsonConvert.DeserializeObject <Block>(data.Body);
if (block.Index == this.blockchain.LastBlock.Index + 1 &&
block.PreviousBlockHash == this.blockchain.LastBlock.BlockHash)
{
string lastBlockHash = this.blockchain.LastBlock.BlockHash;
int nonce = block.Nonce;
string winnerHash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256($"{lastBlockHash}{nonce}"));
if (!winnerHash.ToCharArray().Take(this.blockchain.Difficulty).All(s => s == '0'))
{
Console.WriteLine("Incorrect hash...");
return;
}
this.blockchain.AddBlock(block);
}
else
{
if (block.Index <= this.blockchain.LastBlock.Index)
{
Console.WriteLine("Other node is not synced...");
}
else
{
Console.WriteLine("This node is not synced...");
var ip = data.NodesPair.Item1.Split(':')[0];
var port = int.Parse(data.NodesPair.Item1.Split(':')[1]);
CommandFabric.RunDynamic($"sync -ip {ip} -p {port}");
}
}
}
else if (data.Type == SocketDataType.Receive)
{
if (data.Body == "sync")
{
var ip = data.NodesPair.Item2.Split(':')[0];
var port = int.Parse(data.NodesPair.Item2.Split(':')[1]);
CommandFabric.RunDynamic($"sync -ip {ip} -p {port}");
}
//if (data.Body != string.Empty)
//{
// var newBlocks = JsonConvert.DeserializeObject<Block[]>(data.Body).ToList();
// this.blockchain.RemoveBlockInterval(newBlocks.First().Index, newBlocks.Last().Index);
// foreach (var block in newBlocks)
// {
// this.blockchain.AddBlock(block);
// }
//}
}
}
public void MineAsync()
{
int nonce = 0;
string hash = string.Empty;
try
{
string lastBlockPath = Directory.GetFiles($"{Constants.BlocksFilePath}/", "*.json")
.OrderBy(n => int.Parse(n.Split('_')[1].Replace(".json", ""))).ToList().Last();
string lastBlockHash = StorageFileProvider <Block> .GetModel(lastBlockPath).BlockHash;
int counter = 0;
while (true)
{
counter++;
if (StopThread)
{
break;
}
if (counter > 100000)
{
lastBlockPath = Directory.GetFiles($"{Constants.BlocksFilePath}/", "*.json")
.OrderBy(n => int.Parse(n.Split('_')[1].Replace(".json", ""))).ToList().Last();
lastBlockHash = StorageFileProvider <Block> .GetModel(lastBlockPath).BlockHash;
counter = 0;
}
hash = CryptographyUtilities.BytesToHex(CryptographyUtilities.CalcSHA256($"{lastBlockHash}{nonce}"));
if (hash.ToCharArray().Take(this.blockchain.Difficulty).All(s => s == '0'))
{
string currentLastBlockPath = Directory.GetFiles($"{Constants.BlocksFilePath}/", "*.json")
.OrderBy(n => int.Parse(n.Split('_')[1].Replace(".json", ""))).ToList().Last();
string newLastBlockHash = StorageFileProvider <Block> .GetModel(currentLastBlockPath).BlockHash;
counter = 0;
if (newLastBlockHash != lastBlockHash)
{
nonce = 0;
continue;
}
break;
}
nonce++;
}
}
catch
{
}
if (!StopThread)
{
NextBlockMined(hash, nonce);
Thread thread = new Thread(MineAsync);
thread.Start();
var miningThread = CommandFabric.ThreadsInfo.First(t => t.Key == "Mining");
CommandFabric.ThreadsInfo.Remove(miningThread);
CommandFabric.ThreadsInfo.Add("Mining", thread.ManagedThreadId);
}
}