private void HandleBlock(CommandMessage message)
{
var block = new Block().DeSerialize(message.Data);
logger.Debug("Recieved new block from: " + message.Client.ToString());
chain.AddBlock(block);
logger.Debug("block added ID:" + Convert.ToBase64String(block.Hash) + "index: " + block.Index);
BlockOnTheFly.Remove(HexadecimalEncoding.ToHexString(block.Hash));
//--progress bar
if (highestIndex < block.Index)
{
highestIndex = block.Index; //check best index
}
NewBlockArrived?.Invoke(this, new ProgressBarEventArgs(highestIndex, blocksInTransit.Count, reducedBlockCount)); //invoke this, mainly for progress bar now.
//--progress bar end
if (blocksInTransit.Count > 0)
{
var blockHash = blocksInTransit[0];
SendGetData(message.Client.ToString(), "block", blockHash);
BlockOnTheFly.Add(HexadecimalEncoding.ToHexString(blockHash));
blocksInTransit.RemoveAt(0);
}
else
{
if (BlockOnTheFly.Count != 0)
{
return;
}
reindexing = true;
chain.ReindexUTXO(); // asynch
WholeChainDownloaded?.Invoke(this, EventArgs.Empty); // invoke this after all is downloaded, cause downloading from lastest to oldest, could cause problems after displaying after each block
isBusy = false;
reindexing = false;
ProcessNextMessage();
}
}
private void MineTransactions()
{
miningInProgress = true;
logger.Debug("Mining started");
var startTime = DateTime.Now;
var txList = new List <Transaction>();
var coinBaseTx = Transaction.CoinBaseTx(_loggedUser.Address, ""); //add later
coinBaseTx.Inputs[0].MagicValue = chain.GetBestHeight() + 1;
coinBaseTx.MagicVK = chain.GetBestHeight() + 1;
coinBaseTx.Id = coinBaseTx.CalculateHash();
txList.Add(coinBaseTx);
//fill txList from TransactionPool
foreach (var txPair in TransactionPool)
{
var tx = txPair.Value;
if (chain.VerifyTransaction(tx))
{
txList.Add(tx);
}
}
if (txList.Count == 0)
{
logger.Debug("All txs invalid");
miningInProgress = false;
return;
}
chain.HashDiscovered += HashDiscovered;
NotifyGUIisMining(true);
var newBlock = chain.MineBlock(txList);
if (newBlock != null)
{
//skew for synch
if (handlingNewBlock || (DateTime.Now - timeSkewBetweenHandlingBlock).Milliseconds < 200)
{
// mined same time as block came
logger.Debug($"!New block mined, mining duration: {DateTime.Now - startTime} But discard it, cause handling newRemoteBlock");
miningInProgress = false;
return;
}
NotifyGUIisMining(false);
handlingNewBlock = true;
logger.Debug($"New block mined, mining duration: {DateTime.Now - startTime}");
chain.AddBlock(newBlock);
//30.4
var utxoSet = new UTXOSet(chain);
utxoSet.Update(newBlock);
//
//7.4.19
if (InMemoryBlockChains.Count > 0)
{
logger.Debug("Find best chain");
InMemoryBlockChain bestChain = null;
var count = 1;
var bestIndex = chain.GetBestHeight();
foreach (var chain in InMemoryBlockChains)
{
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();//redundant
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");
}
}
handlingNewBlock = false;
if (IncomingMinedNewBlocksMessages.Count > 0)
{
ProcessMessage(IncomingMinedNewBlocksMessages.Dequeue());
}
//7.4.19
//this means pow was broke
chain.ReindexUTXO();
chain.HashDiscovered -= HashDiscovered;
WholeChainDownloaded?.Invoke(this, EventArgs.Empty);
SendNewBlockMined(newBlock);
//remove txs from Transaction pool
RemoveTransactionsFromPool(txList);
}
else
{
logger.Debug("block added by remote client");
//I delete txs from txpool in NewBlockMined
//chain.ReindexUTXO();
}
miningInProgress = false;
if (TransactionPool.Count > 0)
{
MineTransactions();
}
}
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);
}
}