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Program.cs
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Program.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using blockchain.Models.BlockchainModels;
using Newtonsoft.Json;
using blockchain.Extensions;
using Microsoft.AspNetCore.SignalR.Client;
using System.Net.Http;
using Microsoft.Extensions.DependencyInjection;
using blockchain.Data;
using Microsoft.EntityFrameworkCore;
using blockchain.Providers.Interfaces;
using blockchain.Providers;
using blockchain.Models;
namespace blockchain
{
public class Program
{
public static int Port = 0;
public static Server Server = null;
public static Client Client = null;
public static List<BlockGeneric> Chain = new List<BlockGeneric>();
public static HubConnection SignalRConnection = null;
public const string SocketUrl = "ws://127.0.0.1:";
public static bool IsChainValid = true;
public static bool DoneConnecting = false;
public static bool IsDonatable = false;
public static Transaction TempDonateTransaction = null;
public static Foundation TempFoundation = null;
public static int NumNode = 0;
public static string Name = "Unknown";
public static string Role = "Unknown";
public static int CurrentLeader = 0;
public static int CoolDown = 0;
public static int ConfirmedNumber = 1;
public static int RejectedNumber = 0;
public static int Penalty() => ((int)Math.Floor((double) NumNode / 2)) + 1;
public static int RequiredNumber() => ((int)Math.Ceiling((double) NumNode / 2));
private static ApplicationDbContext _dbContext;
private static IHashProvider _hash;
private static IBlockchainProvider _blockchain;
public static async Task Main(string[] args)
{
if (args.Length == 0)
{
Console.WriteLine("User Mode");
CreateHostBuilder(args).Build().Run();
}
else
{
if (args.Length >= 1)
Port = int.Parse(args[0]);
if (Port > 0)
{
// inject DbContext and HashProvider to Program.cs
var services = new ServiceCollection();
services.AddTransient<IHashProvider, HashProvider>();
services.AddTransient<IBlockchainProvider, BlockchainProvider>();
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer("Server=localhost; Database=BlockchainCharity; Trusted_Connection=True; MultipleActiveResultSets=True;")
,ServiceLifetime.Transient);
var serviceProvider = services.BuildServiceProvider();
_dbContext = serviceProvider.GetService<ApplicationDbContext>();
_hash = serviceProvider.GetService<IHashProvider>();
_blockchain = serviceProvider.GetService<IBlockchainProvider>();
Client = new Client(_blockchain, _hash);
Server = new Server();
Server.Start();
// construct signalr connection
SignalRConnection = new HubConnectionBuilder()
.WithUrl(new Uri("https://127.0.0.1:5001/donateHub"), options =>
{
//bypass SSL on SignalR Client
var handler = new HttpClientHandler
{
ClientCertificateOptions = ClientCertificateOption.Manual,
ServerCertificateCustomValidationCallback = (httpRequestMessage, cert, cetChain, policyErrors) => true
};
options.HttpMessageHandlerFactory = _ => handler;
options.WebSocketConfiguration = sockets =>
{
sockets.RemoteCertificateValidationCallback = (sender, certificate, chain, policyErrors) => true;
};
})
.Build();
// subscribe on method SendTransaction
SignalRConnection.On<Transaction>("SendTransaction", async transaction =>
{
await Validate(transaction);
// await ChangeLeader();
Client.Broadcast($"Decrease Cooldown");
Client.InvokeVote();
await SignalRConnection.InvokeAsync("RemoveFromGroup", "Donate");
});
await SignalRConnection.StartAsync();
}
await LoadChain();
Console.WriteLine("=========================");
Console.WriteLine("1. Connect to a node");
Console.WriteLine("2. Be A Leader");
Console.WriteLine("3. Sync Number of Node");
Console.WriteLine("4. Vote for New Leader");
Console.WriteLine("5. Get All nodes that this node connects to");
Console.WriteLine("6. Get Current Leader");
Console.WriteLine("7. Get Cooldown");
Console.WriteLine("8. Search Transaction");
Console.WriteLine("9. Edit Transaction (For malicious node)");
Console.WriteLine("10. Get Chains");
Console.WriteLine("999. Exit");
Console.WriteLine("=========================");
int selection = 0;
while (selection != 999)
{
switch (selection)
{
case 1:
Console.WriteLine("Please enter the port");
string port = Console.ReadLine();
Client.Connect($"{SocketUrl}{port}/Blockchain");
break;
case 2:
if (IsChainValid)
await Coup();
else
Console.WriteLine("The chain is invalid....");
break;
case 3:
NumNode = Client.GetServers().Count + 1;
Console.WriteLine("Current Nodes are : " + NumNode);
Client.Broadcast($"NumNode : {NumNode}");
DoneConnecting = true;
break;
case 4:
Client.Broadcast($"Decrease Cooldown");
Client.InvokeVote();
await SignalRConnection.InvokeAsync("RemoveFromGroup", "Donate");
break;
case 5:
Console.WriteLine(JsonConvert.SerializeObject(Client.GetServers(), Formatting.Indented));
break;
case 6:
Console.WriteLine($"CurrentLeader : {CurrentLeader}");
break;
case 7:
Console.WriteLine($"CoolDown : {CoolDown}");
Console.WriteLine($"Penalty : {Penalty()}");
Console.WriteLine($"NumNode : {NumNode}");
break;
case 8:
Console.WriteLine("Please enter the transactionId");
string transactionId = Console.ReadLine();
var searchedTransaction = _dbContext.Transactions
.FirstOrDefault(x => x.HashedTransactionId == transactionId);
if (searchedTransaction == null)
{
Console.WriteLine("Transaction not found!");
}
else
{
Console.WriteLine(JsonConvert.SerializeObject(searchedTransaction));
}
break;
case 9:
Console.WriteLine("Please enter the transactionId");
string editedTransactionId = Console.ReadLine();
var transaction = _dbContext.Transactions
.AsNoTracking()
.FirstOrDefault(x => x.HashedTransactionId == editedTransactionId);
if (transaction == null)
{
Console.WriteLine("Transaction not found!");
}
else
{
var allTransactions = _dbContext.Transactions
.Where(x => x.BlockHeight == transaction.BlockHeight)
.AsNoTracking()
.ToList();
transaction.Amount = 5000;
transaction.HashedTransactionId = _hash.HashTransaction(transaction);
foreach (var item in allTransactions)
{
if (item.id == transaction.id)
{
item.HashedTransactionId = transaction.HashedTransactionId;
item.Amount = transaction.Amount;
}
}
if (Program.Port == 2222)
{
var block = _dbContext.Blockchains1.FirstOrDefault(x => x.Height == transaction.BlockHeight);
var hashedTransactions = String.Join('-', allTransactions.Select(x => x.HashedTransactionId));
block.HashedTransactionIds = hashedTransactions;
block.Hash = _hash.HashBlock(block);
}
else if (Program.Port == 2223)
{
var block = _dbContext.Blockchains1.FirstOrDefault(x => x.Height == transaction.BlockHeight);
var hashedTransactions = String.Join('-', allTransactions.Select(x => x.HashedTransactionId));
block.HashedTransactionIds = hashedTransactions;
block.Hash = _hash.HashBlock(block);
}
else
{
var block = _dbContext.Blockchains1.FirstOrDefault(x => x.Height == transaction.BlockHeight);
var hashedTransactions = String.Join('-', allTransactions.Select(x => x.HashedTransactionId));
block.HashedTransactionIds = hashedTransactions;
block.Hash = _hash.HashBlock(block);
}
await _dbContext.SaveChangesAsync();
Console.WriteLine("Done Changing Transaction.....");
}
break;
case 10:
Console.WriteLine(JsonConvert.SerializeObject(Chain, Formatting.Indented));
break;
}
Console.WriteLine("Please select an action");
string action = Console.ReadLine();
await LoadChain();
selection = int.Parse(action);
// if (DoneConnecting)
// {
// await Task.Delay(5000);
if (IsDonatable)
{
await DonateToFoundationIfAble();
}
// Console.WriteLine("FCK ASYNC");
// }
}
Client.Close();
await SignalRConnection.InvokeAsync("RemoveFromGroup", "Donate");
}
// CreateHostBuilder(args).Build().Run();
}
public static List<BlockGeneric> DeleteChains(List<BlockGeneric> newChain)
{
if (Program.Port == 2222)
{
var oldChain = _dbContext.Blockchains1;
_dbContext.Blockchains1.RemoveRange(oldChain);
}
else if (Program.Port == 2223)
{
var oldChain = _dbContext.Blockchains2;
_dbContext.Blockchains2.RemoveRange(oldChain);
}
else
{
var oldChain = _dbContext.Blockchains3;
_dbContext.Blockchains3.RemoveRange(oldChain);
}
List<BlockGeneric> addedChain = new List<BlockGeneric>();
foreach (var item in newChain)
{
var oldblockJson = JsonConvert.SerializeObject(item);
if (Program.Port == 2222)
{
var addedBlock = JsonConvert.DeserializeObject<Block1>(oldblockJson);
addedBlock.id = 0;
_dbContext.Blockchains1.Add(addedBlock);
}
else if (Program.Port == 2223)
{
var addedBlock = JsonConvert.DeserializeObject<Block2>(oldblockJson);
addedBlock.id = 0;
_dbContext.Blockchains2.Add(addedBlock);
}
else
{
var addedBlock = JsonConvert.DeserializeObject<Block3>(oldblockJson);
addedBlock.id = 0;
_dbContext.Blockchains3.Add(addedBlock);
}
addedChain.Add(item);
}
_dbContext.SaveChanges();
Chain = addedChain;
return addedChain;
}
public static async Task Validate(Transaction transaction)
{
var transactionStrings = JsonConvert.SerializeObject(transaction, Formatting.Indented);
Console.WriteLine($"New Transaction : {transactionStrings} \n");
float moneyLeft = 999999999.00f;
User fromUser = new User();
if (!IsDonatable)
{
fromUser = _dbContext.Users.FirstOrDefault(x => x.Username == transaction.FromAddress);
moneyLeft = fromUser.RemainingMoney;
}
if (moneyLeft < transaction.Amount)
{
Console.WriteLine("Money Not Enough!");
}
else
{
if (!IsDonatable)
{
Console.WriteLine("User's Money : " + JsonConvert.SerializeObject(fromUser));
fromUser.RemainingMoney -= transaction.Amount;
}
transaction.HashedTransactionId = _hash.HashTransaction(transaction);
var serializedTransaction = JsonConvert.SerializeObject(transaction);
Client.Broadcast($"Verify : {serializedTransaction}");
while (ConfirmedNumber < RequiredNumber() && ConfirmedNumber + RejectedNumber < NumNode)
{
await Task.Delay(1000);
}
if (ConfirmedNumber < RequiredNumber())
{
Console.WriteLine("Rejected Transaction.....");
ConfirmedNumber = 1;
RejectedNumber = 0;
}
else
{
var blockCharName = _dbContext.Foundations.OrderBy(x => x.NameEn).LastOrDefault()?.NameEn;
if (transaction.ToAddress == blockCharName)
{
var foundations = _dbContext.Foundations.FirstOrDefault(x => x.NameEn == transaction.ToAddress);
var donatedTransactions = _dbContext.Transactions
.Where(x => x.IntendedFoundation == blockCharName)
.ToList();
foundations.TotalDonate += foundations.TotalUnDonate;
foundations.TotalUnDonate = 0;
donatedTransactions.ForEach(x => x.IsDonated = true);
transaction.IsDonated = true;
}
else
{
var foundations = _dbContext.Foundations.FirstOrDefault(x => x.NameEn == transaction.IntendedFoundation);
foundations.TotalUnDonate += transaction.Amount;
transaction.FromAddress = _hash.CalculateHash(transaction.FromAddress);
}
// foundations.TotalDonate += transaction.Amount;
_dbContext.Transactions.Add(transaction);
_dbContext.SaveChanges();
ConfirmedNumber = 1;
RejectedNumber = 0;
Console.WriteLine("Added Transaction.....");
await Task.Delay(5000);
BlockGeneric block;
BlockGeneric prevBlock;
if (Program.Port == 2222)
{
block = new Block1();
prevBlock = _dbContext.Blockchains1
.OrderBy(x => x.UnixTimeStamp)
.LastOrDefault();
}
else if (Program.Port == 2223)
{
block = new Block2();
prevBlock = _dbContext.Blockchains2
.OrderBy(x => x.UnixTimeStamp)
.LastOrDefault();
}
else
{
block = new Block3();
prevBlock = _dbContext.Blockchains3
.OrderBy(x => x.UnixTimeStamp)
.LastOrDefault();
}
var transactions = _dbContext.Transactions
.Where(x => !x.IsCommitted)
.OrderBy(x => x.UnixTimeStamp)
.Take(block.MaxBlockSize)
.ToList();
var hashedTransactions = String.Join('-', transactions.Select(x => x.HashedTransactionId));
block.HashedTransactionIds = hashedTransactions;
block.Height = (prevBlock?.Height + 1) ?? 0;
block.PreviousHash = prevBlock?.Hash;
block.TransactionJsons = transactions != null ? JsonConvert.SerializeObject(transactions) : null;
block.UnixTimeStamp = DateTime.Now.ToUnixTimeStamp();
block.Hash = _hash.HashBlock(block);
block.VerifiedBy = _hash.CalculateHash(Program.Port.ToString());
block.BlockSize = transactions.Count;
transactions.ForEach(x => x.BlockHeight = block.Height);
var serializedBlock = JsonConvert.SerializeObject(block, Formatting.Indented);
Console.WriteLine($"Transaction inside \n {JsonConvert.SerializeObject(transactions, Formatting.Indented)}");
Console.WriteLine($"BlockSize : {block.BlockSize}");
Console.WriteLine($"Block : {serializedBlock}\n");
Client.Broadcast($"New Block : {serializedBlock}");
while (ConfirmedNumber < RequiredNumber() && ConfirmedNumber + RejectedNumber < NumNode)
{
await Task.Delay(30);
}
if (ConfirmedNumber < RequiredNumber())
{
Console.WriteLine("Rejected Block.....");
}
else
{
Console.WriteLine("Added Block.....");
transactions.ForEach(x => x.IsCommitted = true);
if (Program.Port == 2222)
_dbContext.Blockchains1.Add((Block1)block);
else if (Program.Port == 2223)
_dbContext.Blockchains2.Add((Block2)block);
else
_dbContext.Blockchains3.Add((Block3)block);
await _dbContext.SaveChangesAsync();
Client.Broadcast($"Add Block to Chain : {JsonConvert.SerializeObject(block)}");
PreDonateToFoundationIfAble(transaction);
}
ConfirmedNumber = 1;
RejectedNumber = 0;
}
}
}
public static async Task LoadChain()
{
Chain = new List<BlockGeneric>();
if (Program.Port == 2222)
{
var chainDB = await _dbContext.Blockchains1
.OrderBy(x => x.UnixTimeStamp)
.ToListAsync();
Chain.AddRange(chainDB);
}
else if (Program.Port == 2223)
{
var chainDB = await _dbContext.Blockchains2
.OrderBy(x => x.UnixTimeStamp)
.ToListAsync();
Chain.AddRange(chainDB);
}
else
{
var chainDB = await _dbContext.Blockchains3
.OrderBy(x => x.UnixTimeStamp)
.ToListAsync();
Chain.AddRange(chainDB);
}
}
public static void PreDonateToFoundationIfAble(Transaction donateTransaction)
{
var foundation = _dbContext.Foundations.FirstOrDefault(x => x.NameEn == donateTransaction.IntendedFoundation);
// Console.WriteLine(JsonConvert.SerializeObject(foundation));
if (foundation != null && foundation.TotalUnDonate >= foundation.DonateGoal)
{
// Console.WriteLine("SSS");
IsDonatable = true;
TempFoundation = foundation;
TempDonateTransaction = donateTransaction;
}
// Console.WriteLine("DDDDDD");
}
public static async Task DonateToFoundationIfAble()
{
var foundation = TempFoundation;
Transaction donateTransaction = TempDonateTransaction;
Console.WriteLine($"Transaction : {JsonConvert.SerializeObject(foundation)}");
var blockCharFoundation = _dbContext.Foundations
.OrderBy(x => x.id)
.LastOrDefault();
var transaction = new Transaction
{
FromAddress = blockCharFoundation?.NameEn,
ToAddress = foundation.NameEn,
UnixTimeStamp = DateTime.Now.ToUnixTimeStamp(),
IntendedFoundation = foundation.NameEn,
Amount = _dbContext.Transactions
.Where(x => !x.IsDonated
&& x.IntendedFoundation == donateTransaction.IntendedFoundation)
.Sum(x => x.Amount)
};
await Validate(transaction);
TempFoundation = null;
TempDonateTransaction = null;
IsDonatable = false;
Console.WriteLine("Donated Money to project.....");
}
public static async Task Coup()
{
Console.WriteLine("Be a Leader....");
CurrentLeader = Program.Port;
CoolDown = Penalty();
Server.BroadcastLeader();
await SignalRConnection.InvokeAsync("AddToGroup", "Donate");
}
public static async Task JoinLeaderChannel()
{
await SignalRConnection.InvokeAsync("AddToGroup", "Donate");
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
});
}
}