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 <Models.NewBlockEvent>(async o =>
{
if (listenedBlocks.ContainsKey(o.CryptoCode))
{
await server.Send(o);
}
}));
subscriptions.Add(_EventAggregator.Subscribe <Models.NewTransactionEvent>(async o =>
{
var network = Waiters.GetWaiter(o.CryptoCode);
if (network == null)
{
return;
}
bool forward = false;
var derivationScheme = (o.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.TrackedSource));
if (forward)
{
var derivation = (o.TrackedSource as DerivationSchemeTrackedSource)?.DerivationStrategy;
await server.Send(o);
}
}));
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());
}
public async Task <IActionResult> ConnectWebSocket(
string cryptoCode,
bool includeTransaction = true,
CancellationToken cancellation = default)
{
if (!HttpContext.WebSockets.IsWebSocketRequest)
{
return(NotFound());
}
GetNetwork(cryptoCode); // Internally check if cryptoCode is correct
string listenAllDerivationSchemes = null;
var listenedBlocks = new ConcurrentDictionary <string, string>();
var listenedDerivations = new ConcurrentDictionary <(Network, DerivationStrategyBase), DerivationStrategyBase>();
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.HashBlock,
Height = block.Height,
PreviousBlockHash = block?.Previous.HashBlock
});
}
}
}));
subscriptions.Add(_EventAggregator.Subscribe <Events.NewTransactionMatchEvent>(async o =>
{
var network = Waiters.GetWaiter(o.CryptoCode);
if (network == null)
{
return;
}
if (
listenAllDerivationSchemes == "*" ||
listenAllDerivationSchemes == o.CryptoCode ||
listenedDerivations.ContainsKey((network.Network.NBitcoinNetwork, o.Match.DerivationStrategy)))
{
var chain = ChainProvider.GetChain(o.CryptoCode);
if (chain == null)
{
return;
}
var blockHeader = o.BlockId == null ? null : chain.GetBlock(o.BlockId);
await server.Send(new Models.NewTransactionEvent()
{
CryptoCode = o.CryptoCode,
DerivationStrategy = o.Match.DerivationStrategy,
BlockId = blockHeader?.HashBlock,
TransactionData = ToTransactionResult(includeTransaction, chain, new[] { o.SavedTransaction }),
Inputs = o.Match.Inputs,
Outputs = o.Match.Outputs
});
}
}));
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:
if (r.DerivationSchemes != null)
{
r.CryptoCode = r.CryptoCode ?? cryptoCode;
var network = Waiters.GetWaiter(r.CryptoCode)?.Network;
if (network == null)
{
break;
}
foreach (var derivation in r.DerivationSchemes)
{
var parsed = new DerivationStrategyFactory(network.NBitcoinNetwork).Parse(derivation);
listenedDerivations.TryAdd((network.NBitcoinNetwork, parsed), parsed);
}
}
else
{
listenAllDerivationSchemes = r.CryptoCode;
}
break;
default:
break;
}
}
}
catch when(server.Socket.State != WebSocketState.Open)
{
}
finally { subscriptions.Dispose(); await server.DisposeAsync(cancellation); }
return(new EmptyResult());
}