public List <BlockSyncApiModel> All()
{
List <BlockSyncApiModel> blocks = new List <BlockSyncApiModel>();
foreach (var b in Node.BlockChain)
{
blocks.Add(BlockSyncApiModel.FromBlock(b.Value));
}
return(blocks);
}
public void AttachBroadcastedBlock(BlockSyncApiModel block, string nodeAddress)
{
bool isPastBlock = block.Index <= LastBlock.Index;
if (isPastBlock)
{
return;
}
Block minedBlock = Block.ReCreateBlock(block);
ValidateBlockHash(minedBlock, minedBlock.Nonce, minedBlock.BlockHash);
// replace blockchain if another blockain is longer
int nodeDifference = minedBlock.Index - BlockChain.Count;
if (nodeDifference >= 6)
{
int startIndex = minedBlock.Index - nodeDifference;
List <Block> forkedBlocks = NodeSynchornizator.GetBlocksForSync(nodeAddress);
foreach (var bl in forkedBlocks)
{
RevalidateBlock(bl);
BlockChain.AddOrUpdate(bl.Index, bl, (index, curBlock) => { return(bl); });
}
List <string> blockTxs = forkedBlocks.SelectMany(b => b.Transactions).Select(t => t.TransactionHash).ToList();
PendingTransactions = new ConcurrentBag <Transaction>(PendingTransactions.
Where(t => !blockTxs.Contains(t.TransactionHash)));
}
else
{
bool isFutureBlock = LastBlock.BlockHash != minedBlock.PreviousBlockHash;
if (isFutureBlock)
{
return;
}
RevalidateBlock(minedBlock);
// remove mined transactions from pending transactions
List <string> minedTxIds = minedBlock.Transactions.Select(t => t.TransactionHash).ToList();
PendingTransactions = new ConcurrentBag <Transaction>(PendingTransactions.Where(t => !minedTxIds.Contains(t.TransactionHash)).ToList());
BlockChain.TryAdd(minedBlock.Index, minedBlock);
}
}
public static BlockSyncApiModel FromBlock(Block block)
{
BlockSyncApiModel blockModel = new BlockSyncApiModel();
blockModel.Index = block.Index;
blockModel.Transactions = block.Transactions.ToList();
blockModel.Difficulty = block.Difficulty;
blockModel.PreviousBlockHash = block.PreviousBlockHash;
blockModel.MinedBy = block.MinedBy;
blockModel.BlockDataHash = block.BlockDataHash;
blockModel.BlockHash = block.BlockHash;
blockModel.Nonce = block.Nonce;
blockModel.CreatedDate = block.CreatedDate;
return(blockModel);
}
public static Block ReCreateBlock(BlockSyncApiModel bm)
{
Block block = new Block
{
Index = bm.Index,
Transactions = bm.Transactions,
Difficulty = bm.Difficulty,
PreviousBlockHash = bm.PreviousBlockHash,
MinedBy = bm.MinedBy,
BlockDataHash = bm.BlockDataHash,
BlockHash = bm.BlockHash,
Nonce = bm.Nonce,
CreatedDate = bm.CreatedDate
};
return(block);
}
public List <BlockSyncApiModel> GetBlocksForSync(int fromIndex, int count)
{
List <BlockSyncApiModel> blocks = new List <BlockSyncApiModel>();
int endIndex = fromIndex + count - 1;
if (endIndex > Node.BlockChain.Count)
{
endIndex = Node.BlockChain.Count;
}
for (int i = fromIndex; i < endIndex; i++)
{
blocks.Add(BlockSyncApiModel.FromBlock(Node.BlockChain[i]));
}
return(blocks);
}
public void BroadcastBlock(Block block)
{
foreach (Peer p in Peers)
{
try
{
RestClient client = new RestClient(p.Url);
NewBlockApiModel apiModel = new NewBlockApiModel();
apiModel.Block = BlockSyncApiModel.FromBlock(block);
apiModel.NodeAddress = Current.Url;
var blData = JsonConvert.SerializeObject(apiModel);
Console.WriteLine("Block for broadcast: " + blData);
Console.WriteLine();
Console.WriteLine();
client.Post("api/block/new", apiModel);
}
catch (Exception ex) { }
}
}
