public void AddBlockTest()
{
var bc = new BlockChain();
//Create first transaction
var transaction1 = new Transaction("Stevano", "Valentino", 3.0, 0.3);
//{
// Sender = "Stevano",
// Recipient = "Valentino",
// Amount = 3.0,
// Fee = 0.3
//};
bc.TransactionsPool.AddTransaction(transaction1);
bc.AddBlock();
Assert.Equal(2, bc.Count);
//Create 2nd transaction
var transaction2 = new Transaction("Budiawan", "Norita", 2.5, 0.2);
//{
// Sender = "Budiawan",
// Recipient = "Norita",
// Amount = 2.5,
// Fee = 0.2
//};
bc.TransactionsPool.AddTransaction(transaction2);
bc.AddBlock();
Assert.Equal(3, bc.Count);
}
private Block Add(string parentHash, string data)
{
var block = new Block(parentHash, data);
blockChain.AddBlock(block);
return(block);
}
public void TestAddBlockTest()
{
var bc = new BlockChain();
var lsTrx = new List <Transaction>();
//Create 1st transaction
var trx1 = new Transaction
{
Sender = "Stevano",
Recipient = "Valentino",
Amount = 3.0,
Fee = 0.3
};
lsTrx.Add(trx1);
bc.AddBlock(lsTrx.ToArray());
Assert.That(2, Is.EqualTo(bc.Blocks.Count));
//Create 2nd transaction
trx1 = new Transaction
{
Sender = "Budiawan",
Recipient = "Norita",
Amount = 2.5,
Fee = 0.2
};
lsTrx = new List <Transaction>();
lsTrx.Add(trx1);
bc.AddBlock(lsTrx.ToArray());
Assert.That(3, Is.EqualTo(bc.Blocks.Count));
}
public static void SendNewBlock(string content)
{
var block = new Block(DateTime.Now, null, content);
blockChain.AddBlock(block);
var obj = JsonConvert.SerializeObject(block);
client.Send(obj);
}
public static byte[] EencodeMessage(string content)
{
var block = new Block(DateTime.Now, null, content);
blockChain.AddBlock(block);
var obj = JsonConvert.SerializeObject(block);
return(Encoding.UTF8.GetBytes(obj));
}
private static void Demo()
{
// Initialize blockchain
var transactionPool = new TransactionPool();
var blockChain = new BlockChain(transactionPool);
// Create new transactions.
var transaction1 = new Transaction(sender: "Bob", recipient: "Billy", amount: 10, fee: 0.01);
var transaction2 = new Transaction(sender: "John", recipient: "Ivanka", amount: 20, fee: 0.01);
var transaction3 = new Transaction(sender: "Robert", recipient: "Antonio", amount: 30, fee: 0.01);
// Add transactions to transactions pool
blockChain.TransactionsPool.AddTransaction(transaction1);
blockChain.TransactionsPool.AddTransaction(transaction2);
blockChain.TransactionsPool.AddTransaction(transaction3);
// Forging a block - BlockChain will add a new block to the chain and add transactions to it
blockChain.AddBlock();
// Create another transactions.
transaction1 = new Transaction(sender: "Asen", recipient: "Ivan", amount: 110, fee: 0.01);
transaction2 = new Transaction(sender: "Gosho", recipient: "Boqn", amount: 220, fee: 0.01);
transaction3 = new Transaction(sender: "Pesho", recipient: "Martin", amount: 330, fee: 0.01);
// Add transactions to transactions pool
blockChain.TransactionsPool.AddTransaction(transaction1);
blockChain.TransactionsPool.AddTransaction(transaction2);
blockChain.TransactionsPool.AddTransaction(transaction3);
// Forging another block
blockChain.AddBlock();
// We have 2 blocks and 6 transactions
// Chain explorer will output data from block on console
var chainExplorer = new ConsoleChainExplorer(blockChain);
chainExplorer.PrintGenesisBlock();
chainExplorer.PrintLastBlock();
chainExplorer.PrintBalance("Robert");
chainExplorer.PrintBalance("Antonio");
chainExplorer.PrintBalance("Martin");
chainExplorer.PrintTransactionHistory("Robert");
chainExplorer.PrintTransactionHistory("Gosho");
chainExplorer.PrintTransactionHistory("Boqn");
Console.WriteLine();
chainExplorer.PrintBlocks();
Console.WriteLine("Press enter to close application");
Console.ReadLine();
}
public void ValidatesAValidChainTest()
{
blockChain = new BlockChain();
blockChain2 = new BlockChain();
blockChain2.AddBlock("foo");
Assert.True(blockChain.IsValidChain(blockChain2.Chain));
}
public void voidAddsANewBlockTest()
{
blockChain = new BlockChain();
var data = "foo";
blockChain.AddBlock(data);
Assert.Equal(data, blockChain.Chain.LastOrDefault().Data);
}
public void InvalidatesACorruptChain()
{
blockChain = new BlockChain();
blockChain2 = new BlockChain();
blockChain2.AddBlock("foo");
blockChain2.Chain.LastOrDefault().Data = "Not Foo";
Assert.False(blockChain.IsValidChain(blockChain2.Chain));
}
public UnitTestFixture()
{
BlockChain = new BlockChain <Transaction>();
const int blocksToAdd = 2;
for (var i = 0; i < blocksToAdd; i++)
{
BlockChain.AddBlock(GetBlock());
}
}
public void AddBlockToChain(BlockData newBlockData)
{
try
{
_blockChain.AddBlock(newBlockData);
}
catch (Exception e)
{
_logger.LogCritical(e.Message, e);
}
}
public void ItDoesNotReplaceACahinWithLengththatIsEqualOrLessThanItSelf()
{
blockChain = new BlockChain();
blockChain2 = new BlockChain();
blockChain.AddBlock("goo");
blockChain.ReplaceChain(blockChain2.Chain);
Assert.NotEqual(blockChain2.Chain.Count, blockChain.Chain.Count);
}
public void ItReplacesTheChainWithAValidChainTest()
{
blockChain = new BlockChain();
blockChain2 = new BlockChain();
blockChain2.AddBlock("goo");
blockChain.ReplaceChain(blockChain2.Chain);
Assert.Equal(blockChain2.Chain.Count, blockChain.Chain.Count);
}
public IActionResult SetStudentsValuation(WebModel model)
{
Teacher teacher = _dbContext.GetTeacherById(model.Id);
Valuation valuation = new Valuation(teacher, model.Amount, model.Description);
Block block = new Block(DateTime.Now, null, valuation);
string subjectName = model.Subject;
foreach (string id in model.StudentIds)
{
Student student = _dbContext.GetStudentById(id);
if (student.Subjects.Count > 0)
{
foreach (var subject in student.Subjects.Values)
{
if (subject.Subject == subjectName)
{
student.Subjects[subjectName].AddBlock(block);
_dbContext.UpdateStudent(student);
}
else
{
BlockChain blockChain = new BlockChain(subjectName);
blockChain.AddBlock(block);
student.Subjects.Add(subjectName, blockChain);
_dbContext.UpdateStudent(student);
}
}
}
else
{
BlockChain blockChain = new BlockChain(subjectName);
blockChain.AddBlock(block);
student.Subjects.Add(subjectName, blockChain);
_dbContext.UpdateStudent(student);
}
}
List <Student> students = _dbContext.GetStudentsByGroup(model.Group);
List <Group> groups = _dbContext.GetGroups();
model.Students = students;
model.Subjects = teacher.Subjects;
model.Groups = groups;
return(RedirectToRoute(new {
controller = "Teacher",
action = "Index"
}));
}
private async Task <bool> AddBlockToChain(Block MinedBlock)
{
//Adding block to main PureMedChain
PureMedBlockChain.AddBlock(MinedBlock);
//Adding and storing in database
var newBlockChains = await blockChainsDbContext.AllBlockChains.SingleOrDefaultAsync(m => m.ID == 1);
newBlockChains.PureMedBlockChain = JsonConvert.SerializeObject(PureMedBlockChain.Chain);
newBlockChains.Verifier_1BlockChain = JsonConvert.SerializeObject(Verifier1Chain.Chain);
newBlockChains.Verifier_2BlockChain = JsonConvert.SerializeObject(Verifier2Chain.Chain);
newBlockChains.Verifier_3BlockChain = JsonConvert.SerializeObject(Verifier3Chain.Chain);
blockChainsDbContext.AllBlockChains.Update(newBlockChains);
await blockChainsDbContext.SaveChangesAsync();
return(true);
}
public IHttpActionResult Get(string qr)
{
if (!keyHandler.CheckApiKey(this.Request))
{
return(new ForbiddenActionResult(Request, "access denied"));
}
try
{
var result = mapper.GetProductByQr(qr);
if (result != null)
{
result.Process = mapper.GetProcess(result.ProcessId);
result.CurrentTreatment = mapper.GetTreatment(result.CurrrentTreatmentId);
#region bc test
if (result.CurrentTreatment != null && result.CurrentTreatment.OutgoingState.Final)
{
BlockChain bc = new BlockChain(2);
foreach (var step in result.Process.Steps)
{
string stateAsString = JsonConvert.SerializeObject(step);
Block bs = bc.NewBlock(stateAsString);
bc.AddBlock(bs);
}
FileDistributor fd = new FileDistributor();
fd.SaveBlockChain(bc, result.QRCode);
}
#endregion
return(Ok(result));
}
return(NotFound());
}
catch (Exception e)
{
return(BadRequest());
}
}
private void HandleNewBlockMined(CommandMessage rxMsg)
{
try
{
handlingNewBlock = true;
PauseMining(); //pause mining if mining
Block minedBlock = new Block().DeSerialize(rxMsg.Data);
var transactions = minedBlock.Transactions;
logger.Debug("Recieved block, somebody mined: " + Convert.ToBase64String(minedBlock.Hash));
var isValid = IsPreviousHashValid(minedBlock.PreviousHash);
if (!isValid)
{
logger.Debug("Previous hash invalid, try add to fork subchain");
if (!VerifyTransactions(transactions))
{
logger.Debug("Transactions not valid");
ResumeMining();
handlingNewBlock = false;
return;
}
//try to add to fork chains
var added = false;
foreach (var memChain in InMemoryBlockChains)
{
if (memChain.BelongsToThisChain(minedBlock))
{
added = memChain.AddBlock(minedBlock);
RemoveTransactionsFromPool(minedBlock.Transactions);
logger.Debug("Added to subchain");
}
}
if (!added)
{
var newForkChain = new InMemoryBlockChain();
newForkChain.AddBlock(minedBlock);
InMemoryBlockChains.Add(newForkChain);
logger.Debug("Created new subchain");
}
PrintCurrentForkChains(InMemoryBlockChains);
}
else
{
logger.Debug("Previous hash VALID, add to local chain");
if (!VerifyTransactions(transactions))
{
ResumeMining();
handlingNewBlock = false;
timeSkewBetweenHandlingBlock = DateTime.Now;
return;
}
BreakMining();
RemoveTransactionsFromPool(minedBlock.Transactions); //remove new block transactions from pool
chain.AddBlock(minedBlock);
//30.4
var utxoSet = new UTXOSet(chain);
utxoSet.Update(minedBlock);
//
}
if (InMemoryBlockChains.Count > 0)
{
logger.Debug("Find best chain");
InMemoryBlockChain bestChain = null;
var count = 1;
var bestIndex = chain.GetBestHeight(); //local blockchain
foreach (var chain in InMemoryBlockChains) //subchains
{
var currentIndex = chain.GetLastIndex();
if (currentIndex > bestIndex)
{
bestIndex = currentIndex;
count = 1;
bestChain = chain;
}
else if (currentIndex == bestIndex)
{
count++;
}
}
if (count == 1)
{
logger.Debug("Best chain found");
BreakMining();
if (bestChain != null)
{
logger.Debug("Best chain found in subchains, restructualize chain");
//if not restruct to new one
chain.RestructualizeSubchain(bestChain);
InMemoryBlockChains.Clear(); //clear InMemoryChains
}
else
{
//if bestChain is null, chain stays local
logger.Debug("Best chain found in localchain, do nothing");
}
}
else
{
logger.Debug("Best chain not found");
}
}
WholeChainDownloaded?.Invoke(this, EventArgs.Empty);
chain.ReindexUTXO(); // asynch
handlingNewBlock = false;
if (IncomingMinedNewBlocksMessages.Count > 0)
{
ProcessMessage(IncomingMinedNewBlocksMessages.Dequeue());
}
}
catch (Exception e)
{
logger.Error(e.Message);
logger.Error(e.StackTrace);
}
}
static void Main(string[] args)
{
// Make blockchain
var bc = new BlockChain();
//Create new transaction
var trx1 = new Transaction
{
Sender = "Genesis Account",
Recipient = "Ricardo",
Amount = 300,
Fee = 0.001
};
//Create new transaction
var trx2 = new Transaction
{
Sender = "Genesis Account",
Recipient = "Frodo",
Amount = 250,
Fee = 0.001
};
//Create new transaction
var trx3 = new Transaction
{
Sender = "Ricardo",
Recipient = "Madona",
Amount = 20,
Fee = 0.0001
};
//Create list of transactions
var lsTrx = new List <Transaction>
{
trx1,
trx2
};
var transactions = lsTrx.ToArray();
bc.AddBlock(transactions);
lsTrx = new List <Transaction>
{
trx3
};
transactions = lsTrx.ToArray();
bc.AddBlock(transactions);
//Print all blocks
bc.PrintBlocks();
try
{
//Check balance for each account account
var balance = bc.GetBalance("Genesis Account");
Console.WriteLine("Genesis Account balance: {0}", balance);
balance = bc.GetBalance("Ricardo");
Console.WriteLine("Ricardo balance: {0}", balance);
balance = bc.GetBalance("Frodo");
Console.WriteLine("Frodo balance: {0}", balance);
balance = bc.GetBalance("Madona");
Console.WriteLine("Madona balance: {0}", balance);
}
catch (Exception ex)
{
Console.WriteLine($"An error has occurred: {ex.Message}");
}
Console.ReadKey();
}
