public static void CanCalculatePowPosCorrectly()
{
var chain = new ConcurrentChain(File.ReadAllBytes(TestDataLocations.BlockHeadersLocation));
foreach (var block in chain.EnumerateAfter(chain.Genesis))
{
Assert.True(block.CheckPowPosAndTarget(Network.Main));
}
}
public IEnumerable <IBlockInfo> GetBlocks()
{
var fork = _chain.FindFork(LastProcessed.GetLocator());
var headers = _chain
.EnumerateAfter(fork).Where(h => h.Height <= ToHeight)
.ToList();
var first = headers.FirstOrDefault();
if (first == null)
{
yield break;
}
var height = first.Height;
if (first.Height == 1)
{
var headersWithGenesis = new List <ChainedBlock> {
fork
};
headers = headersWithGenesis.Concat(headers).ToList();
height = 0;
}
foreach (var block in _nodeBlocks.GetBlocks(headers.Select(_ => _.HashBlock), CancellationToken))
{
var header = _chain.GetBlock(height);
if (block == null)
{
var storeTip = _nodeBlocks.GetStoreTip();
if (storeTip != null)
{
// Store is caught up with Chain but the block is missing from the store.
if (header.Header.BlockTime <= storeTip.Header.BlockTime)
{
throw new InvalidOperationException($"Chained block not found in store (height = { height }). Re-create the block store.");
}
}
// Allow Store to catch up with Chain.
break;
}
LastProcessed = header;
yield return(new BlockInfoModel()
{
Block = block,
Hash = header.HashBlock,
Height = header.Height
});
height++;
}
}
public void CanCalculatePowCorrectly()
{
var chain = new ConcurrentChain(Network.Main);
EnsureDownloaded("MainChain.dat", "https://aois.blob.core.windows.net/public/MainChain.dat");
chain.Load(File.ReadAllBytes("MainChain.dat"));
foreach (ChainedHeader block in chain.EnumerateAfter(chain.Genesis))
{
Target thisWork = block.GetWorkRequired(Network.Main);
Target thisWork2 = block.Previous.GetNextWorkRequired(Network.Main);
Assert.Equal(thisWork, thisWork2);
Assert.True(block.CheckProofOfWorkAndTarget(Network.Main));
}
}
public void CanEnumerateAfterChainedBlock()
{
ConcurrentChain chain = new ConcurrentChain(Network.Main);
AppendBlock(chain);
var a = AppendBlock(chain);
var b = AppendBlock(chain);
var c = AppendBlock(chain);
Assert.True(chain.EnumerateAfter(a).SequenceEqual(new[] { b, c }));
var d = AppendBlock(chain);
var enumerator = chain.EnumerateAfter(b).GetEnumerator();
enumerator.MoveNext();
Assert.True(enumerator.Current == c);
chain.SetTip(b);
var cc = AppendBlock(chain);
var dd = AppendBlock(chain);
Assert.False(enumerator.MoveNext());
}
public void CanEnumerateAfterChainedBlock()
{
var chain = new ConcurrentChain(this.network);
this.AppendBlock(chain);
ChainedHeader a = this.AppendBlock(chain);
ChainedHeader b = this.AppendBlock(chain);
ChainedHeader c = this.AppendBlock(chain);
Assert.True(chain.EnumerateAfter(a).SequenceEqual(new[] { b, c }));
ChainedHeader d = this.AppendBlock(chain);
IEnumerator <ChainedHeader> enumerator = chain.EnumerateAfter(b).GetEnumerator();
enumerator.MoveNext();
Assert.True(enumerator.Current == c);
chain.SetTip(b);
ChainedHeader cc = this.AppendBlock(chain);
ChainedHeader dd = this.AppendBlock(chain);
Assert.False(enumerator.MoveNext());
}
public void CanIterateConcurrentChain()
{
ConcurrentChain chain = new ConcurrentChain(Network.Main);
AppendBlock(chain);
AppendBlock(chain);
AppendBlock(chain);
foreach (var b in chain.EnumerateAfter(chain.Genesis))
{
chain.GetBlock(0);
}
foreach (var b in chain.ToEnumerable(false))
{
chain.GetBlock(0);
}
}
public void CanIterateConcurrentChain()
{
var chain = new ConcurrentChain(this.network);
this.AppendBlock(chain);
this.AppendBlock(chain);
this.AppendBlock(chain);
foreach (ChainedHeader b in chain.EnumerateAfter(chain.Genesis))
{
chain.GetBlock(0);
}
foreach (ChainedHeader b in chain.ToEnumerable(false))
{
chain.GetBlock(0);
}
}
void StartScan(object unused)
{
var node = AttachedNode;
if (_RunningPing != null)
{
_PlannedScan = true;
return;
}
if (!IsScanning(node))
{
if (Monitor.TryEnter(cs))
{
try
{
if (!IsScanning(node))
{
GetDataPayload payload = new GetDataPayload();
var fork = _Chain.FindFork(_CurrentProgress);
foreach (var block in _Chain
.EnumerateAfter(fork)
.Where(b => b.Header.BlockTime + TimeSpan.FromHours(5.0) > _SkipBefore) //Take 5 more hours, block time might not be right
.Partition(10000)
.FirstOrDefault() ?? new List <ChainedBlock>())
{
if (block.HashBlock != _LastSeen)
{
payload.Inventory.Add(new InventoryVector(InventoryType.MSG_FILTERED_BLOCK, block.HashBlock));
_InFlight.TryAdd(block.HashBlock, block.HashBlock);
}
}
if (payload.Inventory.Count > 0)
{
node.SendMessageAsync(payload);
}
}
}
finally
{
Monitor.Exit(cs);
}
}
}
}
public void CanEnumerateAfterChainedBlock()
{
ConcurrentChain chain = new ConcurrentChain(Network.Main);
AppendBlock(chain);
var a = AppendBlock(chain);
var b = AppendBlock(chain);
var c = AppendBlock(chain);
Assert.True(chain.EnumerateAfter(a).SequenceEqual(new[] { b, c }));
var d = AppendBlock(chain);
var enumerator = chain.EnumerateAfter(b).GetEnumerator();
enumerator.MoveNext();
Assert.True(enumerator.Current == c);
chain.SetTip(b);
var cc = AppendBlock(chain);
var dd = AppendBlock(chain);
Assert.False(enumerator.MoveNext());
}
public void Sync()
{
_isRunning = true;
try
{
var node = Node.Connect(Network.Main, new IPEndPoint(IPAddress.Parse(_settings.Nodes), 16178));
// var node = Node.ConnectToLocal(Network.Main);
//var connectedNodes = _group.ConnectedNodes.ToArray();
//if (!connectedNodes.Any())
//{
// _logger.Information("Waiting for nodes ... ");
// _isRunning = false;
// return;
//}
_logger.Information("************************************************");
_logger.Information("Connecting to Node ");
//_logger.Information($"Total connected nodes {connectedNodes.Length}");
//var rand = new Random();
//var node = connectedNodes[rand.Next(connectedNodes.Length)];
_logger.Information($"Node selected {node.Peer.Endpoint.Address}");
if (node.IsConnected)
{
node.VersionHandshake();
_logger.Information("Connected...");
_logger.Information($"Last Seen -->{node.LastSeen}");
_logger.Information("Checking chain");
if (_chain == null)
{
_logger.Information("Loading chain from disk...");
LoadChain();
if (_chain == null)
{
_logger.Information("No chain found on disk, Syncing chain from node ");
_chain = node.GetChain();
_logger.Information("Chain sync completed");
}
}
_logger.Information("Retrieving latest block...");
var lastDbBlock = _proofService.GetLatestBlock();
_logger.Information($"Latest Block {lastDbBlock}");
_logger.Information("Synching latest chain...");
node.SynchronizeChain(_chain);
_lastHeight = _chain.Height;
_logger.Information($"Lastest Chain Height: {_lastHeight}");
var height = 0;
IEnumerable <IEnumerable <uint256> > hashChunks = null;
if (lastDbBlock == null)
{
_logger.Information("Retrieving chained blocks from height 0");
hashChunks = _chain.ToEnumerable(false).Select(x => x.HashBlock).Chunk(ChunkSize);
}
else
if (lastDbBlock.Height < _chain.Height)
{
_logger.Information($"Retrieving chained blocks from height {lastDbBlock.Height}");
hashChunks = _chain.EnumerateAfter(new uint256(lastDbBlock.Hash)).Select(x => x.HashBlock).Chunk(ChunkSize);
height = lastDbBlock.Height + 1;
}
if (hashChunks != null)
{
_logger.Information($"Total blocks to save {_chain.Height - (lastDbBlock ?? new BlockData()).Height}, hashChunks {hashChunks.LongCount()}");
var chunkSize = 0;
foreach (var hashChunk in hashChunks)
{
_logger.Information($"Retrieving chunks from {chunkSize} - {chunkSize + ChunkSize}");
var blocks = node.GetBlocks(hashChunk);
var dataBlocks = blocks.Select(x =>
{
var block = BlockData.Parse(x);
block.Height = height++;
return(block);
});
_proofService.SaveBlocks(dataBlocks);
chunkSize += ChunkSize;
_logger.Information($"Saved blocks");
}
}
_logger.Information("Finished syncing...");
SaveChain();
_logger.Information("Disconnecting node....");
node.Disconnect();
CheckPending();
//var indexStore = new IndexedBlockStore(new InMemoryNoSqlRepository(), _blockStore);
// CheckAddressTransactions(newBlocks);
_logger.Information("************************************************");
}
else
{
_logger.Information("Couldn't connect to node");
}
}
catch (System.Exception ex)
{
_logger.Information($"Exception while syncing {ex}");
}
finally
{
_isRunning = false;
}
}
