private static Block CalculateHeader(BlockTemplate blockTemplate, uint nonce, uint extraNonce, Networks network)
{
var transactions = new List <BaseTransaction>();
var coinBaseInTrans = blockTemplate.CoinBaseTx.TransactionIn[0] as TransactionInCoinbase;
coinBaseInTrans.CoinBaseScript = BitConverter.GetBytes(extraNonce);
transactions.Add(blockTemplate.CoinBaseTx);
transactions.AddRange(blockTemplate.Transactions);
var block = new Block(blockTemplate.PreviousBlockHash, blockTemplate.Bits, nonce, blockTemplate.Version);
block.Transactions = transactions;
var serialized = block.GetHashHeader();
if (TargetHelper.IsValid(serialized, blockTemplate.Target))
{
var txOut = blockTemplate.CoinBaseTx.TransactionOut;
var firstTxOut = txOut.First();
var adr = GenerateAdr(network);
var minerScript = Script.CreateP2PKHScript(adr.PublicKeyHash);
firstTxOut.Script = minerScript;
return(block);
}
var difference = DateTime.UtcNow.ToUnixTimeUInt32() - blockTemplate.CurrentTime;
if (difference >= blockTemplate.Expires) // EXPIRATION.
{
return(null);
}
if (nonce == uint.MaxValue)
{
nonce = 0;
extraNonce++;
}
Thread.Sleep(100);
nonce++;
return(CalculateHeader(blockTemplate, nonce, extraNonce, network));
}
public void Check(Block block)
{
if (block == null)
{
throw new ArgumentNullException(nameof(block));
}
var merkleRoot = block.BlockHeader.MerkleRoot; // Check MERKLE-ROOT.
var calculatedMerkleRoot = block.GetMerkleRoot();
if (!merkleRoot.SequenceEqual(calculatedMerkleRoot))
{
throw new ValidationException(ErrorCodes.InvalidMerkleRoot);
}
var blockChain = _blockChainStore.GetBlockChain(); // Check PREVIOUS BLOCK.
var currentBlock = blockChain.GetCurrentBlock();
if (!currentBlock.GetHashHeader().SequenceEqual(block.BlockHeader.PreviousBlockHeader))
{
throw new ValidationException(ErrorCodes.InvalidPreviousHashHeader);
}
var hash = currentBlock.GetHashHeader();
var currentNBits = Constants.DEFAULT_NBITS; // TODO : CALCULATE THE DEFAULT NBITS : https://bitcoin.org/en/developer-guide#proof-of-work
var target = TargetHelper.GetTarget(currentNBits);
if (!TargetHelper.IsValid(hash, target))
{
throw new ValidationException(ErrorCodes.NotEnoughDifficult);
}
foreach (var transaction in block.Transactions) // Check ALL TRANSACTIONS.
{
_transactionValidator.Check(transaction);
}
}