public void Execute(DeltaBuilderContext context)
{
if (_logger.IsEnabled(LogEventLevel.Debug))
{
_logger.Debug("Registering new delta with parent ({previousHash})", context.PreviousDeltaHash);
}
_deltaCache.AddLocalDelta(context.Candidate, context.ProducedDelta);
// for easier delta tracking when testing truffle
// if ((context.ProducedDelta.PublicEntries?.Count ?? 0) > 0)
// {
// _deltaCache.AddLocalDelta(context.Candidate, context.ProducedDelta);
// }
}
///<inheritdoc />
public CandidateDeltaBroadcast BuildCandidateDelta(MultiHash previousDeltaHash)
{
_logger.Debug("Building candidate delta locally");
var allTransactions = _transactionRetriever.GetMempoolTransactionsByPriority();
Guard.Argument(allTransactions, nameof(allTransactions))
.NotNull("Mempool content returned null, check the mempool is actively running");
var includedTransactions = GetValidTransactionsForDelta(allTransactions);
var salt = GetSaltFromPreviousDelta(previousDeltaHash);
var rawAndSaltedEntriesBySignature = includedTransactions.SelectMany(
t => t.PublicEntries.Select(e => new RawEntryWithSaltedAndHashedEntry(e, salt, _hashProvider)));
// (Eα;Oα)
var shuffledEntriesBytes = rawAndSaltedEntriesBySignature
.OrderBy(v => v.SaltedAndHashedEntry, ByteUtil.ByteListComparer.Default)
.SelectMany(v => v.RawEntry.ToByteArray())
.ToArray();
// dn
var signaturesInOrder = includedTransactions
.Select(p => p.Signature.ToByteArray())
.OrderBy(s => s, ByteUtil.ByteListComparer.Default)
.SelectMany(b => b)
.ToArray();
// xf
var summedFees = includedTransactions.Sum(t => t.SummedEntryFees());
//∆Ln,j = L(f/E) + dn + E(xf, j)
var coinbaseEntry = new CoinbaseEntry
{
Amount = summedFees.ToUint256ByteString(),
ReceiverPublicKey = _producerUniqueId.PublicKey.ToByteString()
};
var globalLedgerStateUpdate = shuffledEntriesBytes
.Concat(signaturesInOrder)
.Concat(coinbaseEntry.ToByteArray())
.ToArray();
//hj
var candidate = new CandidateDeltaBroadcast
{
// h∆j
Hash = _hashProvider.ComputeMultiHash(globalLedgerStateUpdate).ToArray().ToByteString(),
// Idj
ProducerId = _producerUniqueId,
PreviousDeltaDfsHash = previousDeltaHash.ToArray().ToByteString()
};
_logger.Debug("Building full delta locally");
var producedDelta = new Delta
{
PreviousDeltaDfsHash = previousDeltaHash.ToArray().ToByteString(),
MerkleRoot = candidate.Hash,
CoinbaseEntries = { coinbaseEntry },
PublicEntries = { includedTransactions.SelectMany(t => t.PublicEntries) },
TimeStamp = Timestamp.FromDateTime(_dateTimeProvider.UtcNow)
};
_logger.Debug("Adding local candidate delta");
_deltaCache.AddLocalDelta(candidate, producedDelta);
return(candidate);
}