public async Task <IActionResult> GetStatus(string cryptoCode)
{
var network = GetNetwork(cryptoCode, false);
var waiter = Waiters.GetWaiter(network);
var chain = ChainProvider.GetChain(network);
var repo = RepositoryProvider.GetRepository(network);
var now = DateTimeOffset.UtcNow;
var location = waiter.GetLocation();
var blockchainInfoAsync = waiter.RPCAvailable ? waiter.RPC.GetBlockchainInfoAsyncEx() : null;
var networkInfoAsync = waiter.RPCAvailable ? waiter.RPC.GetNetworkInfoAsync() : null;
await repo.Ping();
var pingAfter = DateTimeOffset.UtcNow;
GetBlockchainInfoResponse blockchainInfo = blockchainInfoAsync == null ? null : await blockchainInfoAsync;
GetNetworkInfoResponse networkInfo = networkInfoAsync == null ? null : await networkInfoAsync;
var status = new StatusResult()
{
NetworkType = network.NBitcoinNetwork.NetworkType,
CryptoCode = network.CryptoCode,
Version = typeof(MainController).GetTypeInfo().Assembly.GetCustomAttribute <AssemblyFileVersionAttribute>().Version,
SupportedCryptoCodes = Waiters.All().Select(w => w.Network.CryptoCode).ToArray(),
RepositoryPingTime = (pingAfter - now).TotalSeconds,
IsFullySynched = true
};
if (status.RepositoryPingTime > 30)
{
Logs.Explorer.LogWarning($"Repository ping exceeded 30 seconds ({(int)status.RepositoryPingTime}), please report the issue to NBXplorer developers");
}
if (blockchainInfo != null)
{
status.BitcoinStatus = new BitcoinStatus()
{
IsSynched = !waiter.IsSynchingCore(blockchainInfo),
Blocks = (int)blockchainInfo.Blocks,
Headers = (int)blockchainInfo.Headers,
VerificationProgress = blockchainInfo.VerificationProgress,
MinRelayTxFee = new FeeRate(Money.Coins((decimal)networkInfo.relayfee), 1000),
IncrementalRelayFee = new FeeRate(Money.Coins((decimal)networkInfo.incrementalfee), 1000),
Capabilities = new NodeCapabilities()
{
CanScanTxoutSet = waiter.RPC.Capabilities.SupportScanUTXOSet,
CanSupportSegwit = waiter.RPC.Capabilities.SupportSegwit
}
};
status.IsFullySynched &= status.BitcoinStatus.IsSynched;
}
status.ChainHeight = chain.Height;
status.SyncHeight = location == null ? (int?)null : chain.FindFork(location).Height;
status.IsFullySynched &= blockchainInfo != null &&
waiter.State == BitcoinDWaiterState.Ready &&
status.SyncHeight.HasValue &&
blockchainInfo.Headers - status.SyncHeight.Value < 3;
return(Json(status));
}
public Task StartAsync(CancellationToken cancellationToken)
{
if (_Disposed)
{
throw new ObjectDisposedException(nameof(BrokerHostedService));
}
_senderBlock = CreateClientBlock();
_senderTransactions = CreateClientTransaction();
_subscriptions.Add(_EventAggregator.Subscribe <Events.NewBlockEvent>(async o =>
{
var chain = ChainProvider.GetChain(o.CryptoCode);
if (chain == null)
{
return;
}
var block = chain.GetBlock(o.BlockId);
if (block != null)
{
var nbe = new Models.NewBlockEvent()
{
CryptoCode = o.CryptoCode,
Hash = block.Hash,
Height = block.Height,
PreviousBlockHash = block?.Previous
};
await _senderBlock.Send(nbe);
}
}));
_subscriptions.Add(_EventAggregator.Subscribe <Events.NewTransactionMatchEvent>(async o =>
{
var network = Waiters.GetWaiter(o.CryptoCode);
if (network == null)
{
return;
}
var chain = ChainProvider.GetChain(o.CryptoCode);
if (chain == null)
{
return;
}
var txe = new Models.NewTransactionEvent()
{
TrackedSource = o.Match.TrackedSource,
DerivationStrategy = o.Match.DerivationStrategy,
CryptoCode = o.CryptoCode,
BlockId = o.BlockId,
TransactionData = Utils.ToTransactionResult(true, chain, new[] { o.SavedTransaction }),
Inputs = o.Match.Inputs,
Outputs = o.Match.Outputs
};
await _senderTransactions.Send(txe);
}));
Logs.Configuration.LogInformation("Starting Azure Service Bus Message Broker");
return(Task.CompletedTask);
}
private async Task UpdateUTXO(UpdatePSBTRequest update, Repository repo, BitcoinDWaiter rpc)
{
AnnotatedTransactionCollection txs = null;
// First, we check for data in our history
foreach (var input in update.PSBT.Inputs.Where(NeedUTXO))
{
txs = txs ?? await GetAnnotatedTransactions(repo, ChainProvider.GetChain(repo.Network), new DerivationSchemeTrackedSource(update.DerivationScheme));
if (txs.GetByTxId(input.PrevOut.Hash) is AnnotatedTransaction tx)
{
if (!tx.Record.Key.IsPruned)
{
input.NonWitnessUtxo = tx.Record.Transaction;
}
else
{
input.WitnessUtxo = tx.Record.ReceivedCoins.FirstOrDefault(c => c.Outpoint.N == input.Index)?.TxOut;
}
}
}
// then, we search data in the saved transactions
await Task.WhenAll(update.PSBT.Inputs
.Where(NeedUTXO)
.Select(async(input) =>
{
// If this is not segwit, or we are unsure of it, let's try to grab from our saved transactions
if (input.NonWitnessUtxo == null)
{
var prev = await repo.GetSavedTransactions(input.PrevOut.Hash);
if (prev.FirstOrDefault() is Repository.SavedTransaction saved)
{
input.NonWitnessUtxo = saved.Transaction;
}
}
}).ToArray());
// finally, we check with rpc's txindex
if (rpc?.RPCAvailable is true && rpc?.HasTxIndex is true)
{
var batch = rpc.RPC.PrepareBatch();
var getTransactions = Task.WhenAll(update.PSBT.Inputs
.Where(NeedUTXO)
.Where(input => input.NonWitnessUtxo == null)
.Select(async input =>
{
var tx = await batch.GetRawTransactionAsync(input.PrevOut.Hash, false);
if (tx != null)
{
input.NonWitnessUtxo = tx;
}
}).ToArray());
await batch.SendBatchAsync();
await getTransactions;
}
}
public async Task <IActionResult> GetTransactions(
string cryptoCode,
[ModelBinder(BinderType = typeof(DerivationStrategyModelBinder))]
DerivationStrategyBase derivationScheme,
[ModelBinder(BinderType = typeof(BitcoinAddressModelBinder))]
BitcoinAddress address,
[ModelBinder(BinderType = typeof(UInt256ModelBinding))]
uint256 txId = null,
bool includeTransaction = true)
{
var trackedSource = GetTrackedSource(derivationScheme, address);
if (trackedSource == null)
{
throw new ArgumentNullException(nameof(trackedSource));
}
TransactionInformation fetchedTransactionInfo = null;
var network = GetNetwork(cryptoCode, false);
var chain = ChainProvider.GetChain(network);
var repo = RepositoryProvider.GetRepository(network);
var response = new GetTransactionsResponse();
int currentHeight = chain.Height;
response.Height = currentHeight;
var txs = await GetAnnotatedTransactions(repo, chain, trackedSource, txId);
foreach (var item in new[]
{
new
{
TxSet = response.ConfirmedTransactions,
AnnotatedTx = txs.ConfirmedTransactions
},
new
{
TxSet = response.UnconfirmedTransactions,
AnnotatedTx = txs.UnconfirmedTransactions
},
new
{
TxSet = response.ReplacedTransactions,
AnnotatedTx = txs.ReplacedTransactions
},
})
{
foreach (var tx in item.AnnotatedTx)
{
var txInfo = new TransactionInformation()
{
BlockHash = tx.Height.HasValue ? tx.Record.BlockHash : null,
Height = tx.Height,
TransactionId = tx.Record.TransactionHash,
Transaction = includeTransaction ? tx.Record.Transaction : null,
Confirmations = tx.Height.HasValue ? currentHeight - tx.Height.Value + 1 : 0,
Timestamp = tx.Record.FirstSeen,
Inputs = tx.Record.SpentOutpoints.Select(o => txs.GetUTXO(o)).Where(o => o != null).ToList(),
Outputs = tx.Record.GetReceivedOutputs().ToList()
};
if (txId == null || txId == txInfo.TransactionId)
{
item.TxSet.Transactions.Add(txInfo);
}
if (txId != null && txId == txInfo.TransactionId)
{
fetchedTransactionInfo = txInfo;
}
txInfo.BalanceChange = txInfo.Outputs.Select(o => o.Value).Sum() - txInfo.Inputs.Select(o => o.Value).Sum();
}
item.TxSet.Transactions.Reverse(); // So the youngest transaction is generally first
}
if (txId == null)
{
return(Json(response));
}
else if (fetchedTransactionInfo == null)
{
return(NotFound());
}
else
{
return(Json(fetchedTransactionInfo));
}
}
public async Task <IActionResult> GetStatus(string cryptoCode)
{
var network = GetNetwork(cryptoCode, false);
var waiter = Waiters.GetWaiter(network);
var chain = ChainProvider.GetChain(network);
var repo = RepositoryProvider.GetRepository(network);
var location = waiter.GetLocation();
GetBlockchainInfoResponse blockchainInfo = null;
if (waiter.RPCAvailable)
{
try
{
var rpc = waiter.RPC.Clone();
rpc.RequestTimeout = TimeSpan.FromMinutes(1.0);
blockchainInfo = await rpc.GetBlockchainInfoAsyncEx();
}
catch (OperationCanceledException) // Timeout, can happen if core is really busy
{
}
}
var status = new StatusResult()
{
NetworkType = network.NBitcoinNetwork.NetworkType,
CryptoCode = network.CryptoCode,
Version = typeof(MainController).GetTypeInfo().Assembly.GetCustomAttribute <AssemblyFileVersionAttribute>().Version,
SupportedCryptoCodes = Waiters.All().Select(w => w.Network.CryptoCode).ToArray(),
IsFullySynched = true
};
GetNetworkInfoResponse networkInfo = waiter.NetworkInfo;
if (blockchainInfo != null && networkInfo != null)
{
status.BitcoinStatus = new BitcoinStatus()
{
IsSynched = !waiter.IsSynchingCore(blockchainInfo),
Blocks = (int)blockchainInfo.Blocks,
Headers = (int)blockchainInfo.Headers,
VerificationProgress = blockchainInfo.VerificationProgress,
MinRelayTxFee = networkInfo.GetRelayFee(),
IncrementalRelayFee = networkInfo.GetIncrementalFee(),
Capabilities = new NodeCapabilities()
{
CanScanTxoutSet = waiter.RPC.Capabilities.SupportScanUTXOSet,
CanSupportSegwit = waiter.RPC.Capabilities.SupportSegwit
},
ExternalAddresses = (networkInfo.localaddresses ?? Array.Empty <GetNetworkInfoResponse.LocalAddress>())
.Select(l => $"{l.address}:{l.port}").ToArray()
};
status.IsFullySynched &= status.BitcoinStatus.IsSynched;
}
status.ChainHeight = chain.Height;
status.SyncHeight = location == null ? (int?)null : chain.FindFork(location).Height;
status.IsFullySynched &= blockchainInfo != null &&
waiter.State == BitcoinDWaiterState.Ready &&
status.SyncHeight.HasValue &&
blockchainInfo.Headers - status.SyncHeight.Value < 3;
if (status.IsFullySynched)
{
var now = DateTimeOffset.UtcNow;
await repo.Ping();
var pingAfter = DateTimeOffset.UtcNow;
status.RepositoryPingTime = (pingAfter - now).TotalSeconds;
if (status.RepositoryPingTime > 30)
{
Logs.Explorer.LogWarning($"Repository ping exceeded 30 seconds ({(int)status.RepositoryPingTime}), please report the issue to NBXplorer developers");
}
}
return(Json(status));
}
public async Task <IActionResult> CreatePSBT(
[ModelBinder(BinderType = typeof(NetworkModelBinder))]
NBXplorerNetwork network,
[ModelBinder(BinderType = typeof(DerivationStrategyModelBinder))]
DerivationStrategyBase strategy,
[FromBody]
JObject body)
{
if (body == null)
{
throw new ArgumentNullException(nameof(body));
}
CreatePSBTRequest request = ParseJObject <CreatePSBTRequest>(body, network);
if (strategy == null)
{
throw new ArgumentNullException(nameof(strategy));
}
var repo = RepositoryProvider.GetRepository(network);
var txBuilder = request.Seed is int s?network.NBitcoinNetwork.CreateTransactionBuilder(s)
: network.NBitcoinNetwork.CreateTransactionBuilder();
CreatePSBTSuggestions suggestions = null;
if (!(request.DisableFingerprintRandomization is true) &&
fingerprintService.GetDistribution(network) is FingerprintDistribution distribution)
{
suggestions ??= new CreatePSBTSuggestions();
var known = new List <(Fingerprint feature, bool value)>();
if (request.RBF is bool rbf)
{
known.Add((Fingerprint.RBF, rbf));
}
if (request.DiscourageFeeSniping is bool feeSnipping)
{
known.Add((Fingerprint.FeeSniping, feeSnipping));
}
if (request.LockTime is LockTime l)
{
if (l == LockTime.Zero)
{
known.Add((Fingerprint.TimelockZero, true));
}
}
if (request.Version is uint version)
{
if (version == 1)
{
known.Add((Fingerprint.V1, true));
}
if (version == 2)
{
known.Add((Fingerprint.V2, true));
}
}
known.Add((Fingerprint.SpendFromMixed, false));
known.Add((Fingerprint.SequenceMixed, false));
if (strategy is DirectDerivationStrategy direct)
{
if (direct.Segwit)
{
known.Add((Fingerprint.SpendFromP2WPKH, true));
}
else
{
known.Add((Fingerprint.SpendFromP2PKH, true));
}
}
else
{
// TODO: What if multisig? For now we consider it p2wpkh
known.Add((Fingerprint.SpendFromP2SHP2WPKH, true));
}
Fingerprint fingerprint = distribution.PickFingerprint(txBuilder.ShuffleRandom);
try
{
fingerprint = distribution.KnowingThat(known.ToArray())
.PickFingerprint(txBuilder.ShuffleRandom);
}
catch (InvalidOperationException)
{
}
request.RBF ??= fingerprint.HasFlag(Fingerprint.RBF);
request.DiscourageFeeSniping ??= fingerprint.HasFlag(Fingerprint.FeeSniping);
if (request.LockTime is null && fingerprint.HasFlag(Fingerprint.TimelockZero))
{
request.LockTime = new LockTime(0);
}
if (request.Version is null && fingerprint.HasFlag(Fingerprint.V1))
{
request.Version = 1;
}
if (request.Version is null && fingerprint.HasFlag(Fingerprint.V2))
{
request.Version = 2;
}
suggestions.ShouldEnforceLowR = fingerprint.HasFlag(Fingerprint.LowR);
}
var waiter = Waiters.GetWaiter(network);
if (waiter.NetworkInfo?.GetRelayFee() is FeeRate feeRate)
{
txBuilder.StandardTransactionPolicy.MinRelayTxFee = feeRate;
}
txBuilder.OptInRBF = !(request.RBF is false);
if (request.LockTime is LockTime lockTime)
{
txBuilder.SetLockTime(lockTime);
}
// Discourage fee sniping.
//
// For a large miner the value of the transactions in the best block and
// the mempool can exceed the cost of deliberately attempting to mine two
// blocks to orphan the current best block. By setting nLockTime such that
// only the next block can include the transaction, we discourage this
// practice as the height restricted and limited blocksize gives miners
// considering fee sniping fewer options for pulling off this attack.
//
// A simple way to think about this is from the wallet's point of view we
// always want the blockchain to move forward. By setting nLockTime this
// way we're basically making the statement that we only want this
// transaction to appear in the next block; we don't want to potentially
// encourage reorgs by allowing transactions to appear at lower heights
// than the next block in forks of the best chain.
//
// Of course, the subsidy is high enough, and transaction volume low
// enough, that fee sniping isn't a problem yet, but by implementing a fix
// now we ensure code won't be written that makes assumptions about
// nLockTime that preclude a fix later.
else if (!(request.DiscourageFeeSniping is false))
{
if (waiter.State is BitcoinDWaiterState.Ready)
{
int blockHeight = ChainProvider.GetChain(network).Height;
// Secondly occasionally randomly pick a nLockTime even further back, so
// that transactions that are delayed after signing for whatever reason,
// e.g. high-latency mix networks and some CoinJoin implementations, have
// better privacy.
if (txBuilder.ShuffleRandom.Next(0, 10) == 0)
{
blockHeight = Math.Max(0, blockHeight - txBuilder.ShuffleRandom.Next(0, 100));
}
txBuilder.SetLockTime(new LockTime(blockHeight));
}
else
{
txBuilder.SetLockTime(new LockTime(0));
}
}
var utxos = (await GetUTXOs(network.CryptoCode, strategy, null)).As <UTXOChanges>().GetUnspentUTXOs(request.MinConfirmations);
var availableCoinsByOutpoint = utxos.ToDictionary(o => o.Outpoint);
if (request.IncludeOnlyOutpoints != null)
{
var includeOnlyOutpoints = request.IncludeOnlyOutpoints.ToHashSet();
availableCoinsByOutpoint = availableCoinsByOutpoint.Where(c => includeOnlyOutpoints.Contains(c.Key)).ToDictionary(o => o.Key, o => o.Value);
}
if (request.ExcludeOutpoints?.Any() is true)
{
var excludedOutpoints = request.ExcludeOutpoints.ToHashSet();
availableCoinsByOutpoint = availableCoinsByOutpoint.Where(c => !excludedOutpoints.Contains(c.Key)).ToDictionary(o => o.Key, o => o.Value);
}
if (request.MinValue != null)
{
availableCoinsByOutpoint = availableCoinsByOutpoint.Where(c => request.MinValue >= (Money)c.Value.Value).ToDictionary(o => o.Key, o => o.Value);
}
ICoin[] coins = null;
if (strategy.GetDerivation().Redeem != null)
{
// We need to add the redeem script to the coins
var hdKeys = strategy.AsHDRedeemScriptPubKey().AsHDKeyCache();
var arr = availableCoinsByOutpoint.Values.ToArray();
coins = new ICoin[arr.Length];
// Can be very intense CPU wise
Parallel.For(0, coins.Length, i =>
{
coins[i] = ((Coin)arr[i].AsCoin()).ToScriptCoin(hdKeys.Derive(arr[i].KeyPath).ScriptPubKey);
});
}
else
{
coins = availableCoinsByOutpoint.Values.Select(v => v.AsCoin()).ToArray();
}
txBuilder.AddCoins(coins);
foreach (var dest in request.Destinations)
{
if (dest.SweepAll)
{
try
{
txBuilder.SendAll(dest.Destination);
}
catch
{
throw new NBXplorerException(new NBXplorerError(400, "not-enough-funds", "You can't sweep funds, because you don't have any."));
}
}
else
{
txBuilder.Send(dest.Destination, dest.Amount);
if (dest.SubstractFees)
{
try
{
txBuilder.SubtractFees();
}
catch
{
throw new NBXplorerException(new NBXplorerError(400, "not-enough-funds", "You can't substract fee on this destination, because not enough money was sent to it"));
}
}
}
}
(Script ScriptPubKey, KeyPath KeyPath)change = (null, null);
bool hasChange = false;
if (request.ExplicitChangeAddress == null)
{
var keyInfo = await repo.GetUnused(strategy, DerivationFeature.Change, 0, false);
change = (keyInfo.ScriptPubKey, keyInfo.KeyPath);
}
else
{
// The provided explicit change might have a known keyPath, let's change for it
KeyPath keyPath = null;
var keyInfos = await repo.GetKeyInformations(new[] { request.ExplicitChangeAddress.ScriptPubKey });
if (keyInfos.TryGetValue(request.ExplicitChangeAddress.ScriptPubKey, out var kis))
{
keyPath = kis.FirstOrDefault(k => k.DerivationStrategy == strategy)?.KeyPath;
}
change = (request.ExplicitChangeAddress.ScriptPubKey, keyPath);
}
txBuilder.SetChange(change.ScriptPubKey);
PSBT psbt = null;
try
{
if (request.FeePreference?.ExplicitFeeRate is FeeRate explicitFeeRate)
{
txBuilder.SendEstimatedFees(explicitFeeRate);
}
else if (request.FeePreference?.BlockTarget is int blockTarget)
{
try
{
var rate = await GetFeeRate(blockTarget, network.CryptoCode);
txBuilder.SendEstimatedFees(rate.FeeRate);
}
catch (NBXplorerException e) when(e.Error.Code == "fee-estimation-unavailable" && request.FeePreference?.FallbackFeeRate is FeeRate fallbackFeeRate)
{
txBuilder.SendEstimatedFees(fallbackFeeRate);
}
}
else if (request.FeePreference?.ExplicitFee is Money explicitFee)
{
txBuilder.SendFees(explicitFee);
}
else
{
try
{
var rate = await GetFeeRate(1, network.CryptoCode);
txBuilder.SendEstimatedFees(rate.FeeRate);
}
catch (NBXplorerException e) when(e.Error.Code == "fee-estimation-unavailable" && request.FeePreference?.FallbackFeeRate is FeeRate fallbackFeeRate)
{
txBuilder.SendEstimatedFees(fallbackFeeRate);
}
}
psbt = txBuilder.BuildPSBT(false);
hasChange = psbt.Outputs.Any(o => o.ScriptPubKey == change.ScriptPubKey);
}
catch (NotEnoughFundsException)
{
throw new NBXplorerException(new NBXplorerError(400, "not-enough-funds", "Not enough funds for doing this transaction"));
}
// We made sure we can build the PSBT, so now we can reserve the change address if we need to
if (hasChange && request.ExplicitChangeAddress == null && request.ReserveChangeAddress)
{
var derivation = await repo.GetUnused(strategy, DerivationFeature.Change, 0, true);
// In most of the time, this is the same as previously, so no need to rebuild PSBT
if (derivation.ScriptPubKey != change.ScriptPubKey)
{
change = (derivation.ScriptPubKey, derivation.KeyPath);
txBuilder.SetChange(change.ScriptPubKey);
psbt = txBuilder.BuildPSBT(false);
}
}
var tx = psbt.GetOriginalTransaction();
if (request.Version is uint v)
{
tx.Version = v;
}
psbt = txBuilder.CreatePSBTFrom(tx, false, SigHash.All);
var update = new UpdatePSBTRequest()
{
DerivationScheme = strategy,
PSBT = psbt,
RebaseKeyPaths = request.RebaseKeyPaths,
AlwaysIncludeNonWitnessUTXO = request.AlwaysIncludeNonWitnessUTXO,
IncludeGlobalXPub = request.IncludeGlobalXPub
};
await UpdatePSBTCore(update, network);
var resp = new CreatePSBTResponse()
{
PSBT = update.PSBT,
ChangeAddress = hasChange ? change.ScriptPubKey.GetDestinationAddress(network.NBitcoinNetwork) : null,
Suggestions = suggestions
};
return(Json(resp, network.JsonSerializerSettings));
}
public async Task <GetTransactionsResponse> GetTransactions(
string cryptoCode,
[ModelBinder(BinderType = typeof(DerivationStrategyModelBinder))]
DerivationStrategyBase derivationScheme,
[ModelBinder(BinderType = typeof(BitcoinAddressModelBinder))]
BitcoinAddress address,
[ModelBinder(BinderType = typeof(BookmarksModelBinding))]
HashSet <Bookmark> unconfirmedBookmarks = null,
[ModelBinder(BinderType = typeof(BookmarksModelBinding))]
HashSet <Bookmark> confirmedBookmarks = null,
[ModelBinder(BinderType = typeof(BookmarksModelBinding))]
HashSet <Bookmark> replacedBookmarks = null,
bool includeTransaction = true,
bool longPolling = false)
{
var trackedSource = GetTrackedSource(derivationScheme, address);
if (trackedSource == null)
{
throw new ArgumentNullException(nameof(trackedSource));
}
GetTransactionsResponse response = null;
using (CancellationTokenSource cts = new CancellationTokenSource())
{
if (longPolling)
{
cts.CancelAfter(LongPollTimeout);
}
var network = GetNetwork(cryptoCode, false);
var chain = ChainProvider.GetChain(network);
var repo = RepositoryProvider.GetRepository(network);
while (true)
{
response = new GetTransactionsResponse();
int currentHeight = chain.Height;
response.Height = currentHeight;
var txs = await GetAnnotatedTransactions(repo, chain, trackedSource);
foreach (var item in new[]
{
new
{
TxSet = response.ConfirmedTransactions,
KnownBookmarks = confirmedBookmarks ?? new HashSet <Bookmark>(),
AnnotatedTx = txs.ConfirmedTransactions
},
new
{
TxSet = response.UnconfirmedTransactions,
KnownBookmarks = unconfirmedBookmarks ?? new HashSet <Bookmark>(),
AnnotatedTx = txs.UnconfirmedTransactions
},
new
{
TxSet = response.ReplacedTransactions,
KnownBookmarks = replacedBookmarks ?? new HashSet <Bookmark>(),
AnnotatedTx = txs.ReplacedTransactions
},
})
{
item.TxSet.Bookmark = Bookmark.Start;
item.TxSet.KnownBookmark = item.KnownBookmarks.Contains(Bookmark.Start) ? Bookmark.Start : null;
BookmarkProcessor processor = new BookmarkProcessor(32 + 32 + 25);
foreach (var tx in item.AnnotatedTx)
{
processor.PushNew();
processor.AddData(tx.Record.TransactionHash);
processor.AddData(tx.Record.BlockHash ?? uint256.Zero);
processor.UpdateBookmark();
var txInfo = new TransactionInformation()
{
BlockHash = tx.Height.HasValue ? tx.Record.BlockHash : null,
Height = tx.Height,
TransactionId = tx.Record.TransactionHash,
Transaction = includeTransaction ? tx.Record.Transaction : null,
Confirmations = tx.Height.HasValue ? currentHeight - tx.Height.Value + 1 : 0,
Timestamp = txs.GetByTxId(tx.Record.TransactionHash).Select(t => t.Record.FirstSeen).First(),
Inputs = tx.Record.SpentOutpoints.Select(o => txs.GetUTXO(o)).Where(o => o != null).ToList(),
Outputs = tx.Record.GetReceivedOutputs(trackedSource).ToList()
};
item.TxSet.Transactions.Add(txInfo);
txInfo.BalanceChange = txInfo.Outputs.Select(o => o.Value).Sum() - txInfo.Inputs.Select(o => o.Value).Sum();
item.TxSet.Bookmark = processor.CurrentBookmark;
if (item.KnownBookmarks.Contains(processor.CurrentBookmark))
{
item.TxSet.KnownBookmark = processor.CurrentBookmark;
item.TxSet.Transactions.Clear();
}
}
}
if (!longPolling || response.HasChanges())
{
break;
}
if (!await WaitingTransaction(trackedSource, cts.Token))
{
break;
}
}
}
return(response);
}
public async Task <IActionResult> ConnectWebSocket(
string cryptoCode,
bool includeTransaction = true,
CancellationToken cancellation = default)
{
if (!HttpContext.WebSockets.IsWebSocketRequest)
{
return(NotFound());
}
GetNetwork(cryptoCode, false); // Internally check if cryptoCode is correct
string listenAllDerivationSchemes = null;
string listenAllTrackedSource = null;
var listenedBlocks = new ConcurrentDictionary <string, string>();
var listenedDerivations = new ConcurrentDictionary <(Network, DerivationStrategyBase), DerivationStrategyBase>();
var listenedTrackedSource = new ConcurrentDictionary <(Network, TrackedSource), TrackedSource>();
WebsocketMessageListener server = new WebsocketMessageListener(await HttpContext.WebSockets.AcceptWebSocketAsync(), _SerializerSettings);
CompositeDisposable subscriptions = new CompositeDisposable();
subscriptions.Add(_EventAggregator.Subscribe <Events.NewBlockEvent>(async o =>
{
if (listenedBlocks.ContainsKey(o.CryptoCode))
{
var chain = ChainProvider.GetChain(o.CryptoCode);
if (chain == null)
{
return;
}
var block = chain.GetBlock(o.BlockId);
if (block != null)
{
await server.Send(new Models.NewBlockEvent()
{
CryptoCode = o.CryptoCode,
Hash = block.Hash,
Height = block.Height,
PreviousBlockHash = block?.Previous
});
}
}
}));
subscriptions.Add(_EventAggregator.Subscribe <Events.NewTransactionMatchEvent>(async o =>
{
var network = Waiters.GetWaiter(o.CryptoCode);
if (network == null)
{
return;
}
bool forward = false;
var derivationScheme = (o.TrackedTransaction.TrackedSource as DerivationSchemeTrackedSource)?.DerivationStrategy;
if (derivationScheme != null)
{
forward |= listenAllDerivationSchemes == "*" ||
listenAllDerivationSchemes == o.CryptoCode ||
listenedDerivations.ContainsKey((network.Network.NBitcoinNetwork, derivationScheme));
}
forward |= listenAllTrackedSource == "*" || listenAllTrackedSource == o.CryptoCode ||
listenedTrackedSource.ContainsKey((network.Network.NBitcoinNetwork, o.TrackedTransaction.TrackedSource));
if (forward)
{
var chain = ChainProvider.GetChain(o.CryptoCode);
if (chain == null)
{
return;
}
var blockHeader = o.BlockId == null ? null : chain.GetBlock(o.BlockId);
var derivation = (o.TrackedTransaction.TrackedSource as DerivationSchemeTrackedSource)?.DerivationStrategy;
await server.Send(new Models.NewTransactionEvent()
{
CryptoCode = o.CryptoCode,
BlockId = blockHeader?.Hash,
TransactionData = Utils.ToTransactionResult(includeTransaction, chain, new[] { o.SavedTransaction }),
}.SetMatch(o.TrackedTransaction));
}
}));
try
{
while (server.Socket.State == WebSocketState.Open)
{
object message = await server.NextMessageAsync(cancellation);
switch (message)
{
case Models.NewBlockEventRequest r:
r.CryptoCode = r.CryptoCode ?? cryptoCode;
listenedBlocks.TryAdd(r.CryptoCode, r.CryptoCode);
break;
case Models.NewTransactionEventRequest r:
var network = Waiters.GetWaiter(r.CryptoCode)?.Network;
if (r.DerivationSchemes != null)
{
r.CryptoCode = r.CryptoCode ?? cryptoCode;
if (network != null)
{
foreach (var derivation in r.DerivationSchemes)
{
var parsed = new DerivationStrategyFactory(network.NBitcoinNetwork).Parse(derivation);
listenedDerivations.TryAdd((network.NBitcoinNetwork, parsed), parsed);
}
}
}
else if (
// Back compat: If no derivation scheme precised and ListenAllDerivationSchemes not set, we listen all
(r.TrackedSources == null && r.ListenAllDerivationSchemes == null) ||
(r.ListenAllDerivationSchemes != null && r.ListenAllDerivationSchemes.Value))
{
listenAllDerivationSchemes = r.CryptoCode;
}
if (r.ListenAllTrackedSource != null && r.ListenAllTrackedSource.Value)
{
listenAllTrackedSource = r.CryptoCode;
}
else if (r.TrackedSources != null)
{
r.CryptoCode = r.CryptoCode ?? cryptoCode;
if (network != null)
{
foreach (var trackedSource in r.TrackedSources)
{
if (TrackedSource.TryParse(trackedSource, out var parsed, network.NBitcoinNetwork))
{
listenedTrackedSource.TryAdd((network.NBitcoinNetwork, parsed), parsed);
}
}
}
}
break;
default:
break;
}
}
}
catch when(server.Socket.State != WebSocketState.Open)
{
}
finally { subscriptions.Dispose(); await server.DisposeAsync(cancellation); }
return(new EmptyResult());
}