public async Task Subscribe(CancellationToken cancellationToken)
{
// http://docs.nethereum.com/en/latest/nethereum-subscriptions-streaming/
using var streamingClient = new StreamingWebSocketClient(_batBotOptions.BlockchainEndpointWssUrl);
var subscription = new EthNewPendingTransactionObservableSubscription(streamingClient);
await _ethereumService.HandleSubscription(streamingClient, subscription, async() => await subscription.SubscribeAsync(), async th =>
{
await _messagingService.SendLogMessage($"Pending Transaction Hash: {th}");
// Don't process transactions (discard) when one is being processed for front running.
if (_backoffService.BackOff())
{
return;
}
await _backoffService.Protect(async() => await _transactionProcessorService.Process(await _ethereumService.GetSwap(th), cancellationToken));
}, null, cancellationToken);
}
public static async Task SubscribeAndRunAsync()
{
if (client == null)
{
client = new StreamingWebSocketClient("wss://mainnet.infura.io/ws/v3/206cfadcef274b49a3a15c45c285211c");
client.Error += Client_Error;
}
// var client = new StreamingWebSocketClient("ws://127.0.0.1:8546");
var blockHeaderSubscription = new EthNewBlockHeadersObservableSubscription(client);
blockHeaderSubscription.GetSubscribeResponseAsObservable().Subscribe(subscriptionId =>
Console.WriteLine("Block Header subscription Id: " + subscriptionId));
blockHeaderSubscription.GetSubscriptionDataResponsesAsObservable().Subscribe(block =>
Console.WriteLine("New Block: " + block.BlockHash)
, exception =>
{
Console.WriteLine("BlockHeaderSubscription error info:" + exception.Message);
});
blockHeaderSubscription.GetUnsubscribeResponseAsObservable().Subscribe(response =>
Console.WriteLine("Block Header unsubscribe result: " + response));
var blockHeaderSubscription2 = new EthNewBlockHeadersSubscription(client);
blockHeaderSubscription2.SubscriptionDataResponse += (object sender, StreamingEventArgs <Block> e) =>
{
Console.WriteLine("New Block from event: " + e.Response.BlockHash);
};
blockHeaderSubscription2.GetDataObservable().Subscribe(x =>
Console.WriteLine("New Block from observable from event : " + x.BlockHash)
);
var pendingTransactionsSubscription = new EthNewPendingTransactionObservableSubscription(client);
pendingTransactionsSubscription.GetSubscribeResponseAsObservable().Subscribe(subscriptionId =>
Console.WriteLine("Pending transactions subscription Id: " + subscriptionId));
pendingTransactionsSubscription.GetSubscriptionDataResponsesAsObservable().Subscribe(transactionHash =>
Console.WriteLine("New Pending TransactionHash: " + transactionHash)
, exception =>
{
Console.WriteLine("Pending transactions error info:" + exception.Message);
});
pendingTransactionsSubscription.GetUnsubscribeResponseAsObservable().Subscribe(response =>
Console.WriteLine("Pending transactions unsubscribe result: " + response));
var ethGetBalance = new EthGetBalanceObservableHandler(client);
var subs = ethGetBalance.GetResponseAsObservable().Subscribe(balance =>
Console.WriteLine("Balance xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx: " + balance.Value.ToString()));
var ethBlockNumber = new EthBlockNumberObservableHandler(client);
ethBlockNumber.GetResponseAsObservable().Subscribe(blockNumber =>
Console.WriteLine("Block number: bbbbbbbbbbbbbb" + blockNumber.Value.ToString()));
var ethLogs = new EthLogsObservableSubscription(client);
ethLogs.GetSubscriptionDataResponsesAsObservable().Subscribe(log =>
Console.WriteLine("Log Address:" + log.Address)
, exception =>
{
Console.WriteLine("Logs error info:" + exception.Message);
});
//no contract address
var filterTransfers = Event <TransferEventDTO> .GetEventABI().CreateFilterInput();
var ethLogsTokenTransfer = new EthLogsObservableSubscription(client);
ethLogsTokenTransfer.GetSubscriptionDataResponsesAsObservable().Subscribe(log =>
{
try
{
var decoded = Event <TransferEventDTO> .DecodeEvent(log);
if (decoded != null)
{
Console.WriteLine("Contract address: " + log.Address + " Log Transfer from:" + decoded.Event.From);
}
else
{
Console.WriteLine("Found not standard transfer log");
}
}
catch (Exception ex)
{
Console.WriteLine("Log Address: " + log.Address + " is not a standard transfer log:", ex.Message);
}
}, exception =>
{
Console.WriteLine("Logs error info:" + exception.Message);
});
await client.StartAsync();
blockHeaderSubscription.SubscribeAsync().Wait();
//blockHeaderSubscription2.SubscribeAsync().Wait();
pendingTransactionsSubscription.SubscribeAsync().Wait();
//ethGetBalance.SendRequestAsync("0x742d35cc6634c0532925a3b844bc454e4438f44e", BlockParameter.CreateLatest()).Wait();
//ethBlockNumber.SendRequestAsync().Wait();
//ethLogs.SubscribeAsync().Wait();
//await ethLogsTokenTransfer.SubscribeAsync(filterTransfers);
//Thread.Sleep(30000);
//pendingTransactionsSubscription.UnsubscribeAsync().Wait();
//Thread.Sleep(20000);
//blockHeaderSubscription.UnsubscribeAsync().Wait();
// await client.StopAsync();
// await SubscribeAndRunAsync();
}
static void CreateWebSocketClient(string _websocketUrl)
{
_streamingWebSocketClient = new StreamingWebSocketClient(_websocketUrl);
PendingTransactionsSubscription = new EthNewPendingTransactionObservableSubscription(_streamingWebSocketClient);
Console.WriteLine($"Eth WebSocketsStreamingSample CreateWebSocketClient Init ...............");
}
static void Main(string[] args)
{
var client = new StreamingWebSocketClient("wss://mainnet.infura.io/ws");
// var client = new StreamingWebSocketClient("ws://127.0.0.1:8546");
var blockHeaderSubscription = new EthNewBlockHeadersObservableSubscription(client);
blockHeaderSubscription.GetSubscribeResponseAsObservable().Subscribe(subscriptionId =>
Console.WriteLine("Block Header subscription Id: " + subscriptionId));
blockHeaderSubscription.GetSubscriptionDataResponsesAsObservable().Subscribe(block =>
Console.WriteLine("New Block: " + block.BlockHash));
blockHeaderSubscription.GetUnsubscribeResponseAsObservable().Subscribe(response =>
Console.WriteLine("Block Header unsubscribe result: " + response));
var blockHeaderSubscription2 = new EthNewBlockHeadersSubscription(client);
blockHeaderSubscription2.SubscriptionDataResponse += (object sender, StreamingEventArgs <Block> e) =>
{
Console.WriteLine("New Block from event: " + e.Response.BlockHash);
};
var disposable = Observable.FromEventPattern <StreamingEventArgs <Block> >(h => blockHeaderSubscription2.SubscriptionDataResponse += h,
h => blockHeaderSubscription2.SubscriptionDataResponse -= h).Subscribe(x =>
Console.WriteLine("New Block from observable from event : " + x.EventArgs.Response.BlockHash)
);
var pendingTransactionsSubscription = new EthNewPendingTransactionObservableSubscription(client);
pendingTransactionsSubscription.GetSubscribeResponseAsObservable().Subscribe(subscriptionId =>
Console.WriteLine("Pending transactions subscription Id: " + subscriptionId));
pendingTransactionsSubscription.GetSubscriptionDataResponsesAsObservable().Subscribe(transactionHash =>
Console.WriteLine("New Pending TransactionHash: " + transactionHash));
pendingTransactionsSubscription.GetUnsubscribeResponseAsObservable().Subscribe(response =>
Console.WriteLine("Pending transactions unsubscribe result: " + response));
var ethGetBalance = new EthGetBalanceObservableHandler(client);
var subs = ethGetBalance.GetResponseAsObservable().Subscribe(balance =>
Console.WriteLine("Balance xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx: " + balance.Value.ToString()));
var ethBlockNumber = new EthBlockNumberObservableHandler(client);
ethBlockNumber.GetResponseAsObservable().Subscribe(blockNumber =>
Console.WriteLine("Block number: bbbbbbbbbbbbbb" + blockNumber.Value.ToString()));
var ethLogs = new EthLogsObservableSubscription(client);
ethLogs.GetSubscriptionDataResponsesAsObservable().Subscribe(log =>
Console.WriteLine("Log Address:" + log.Address));
//no contract address
var filterTransfers = Event <TransferEventDTO> .GetEventABI().CreateFilterInput();
var ethLogsTokenTransfer = new EthLogsObservableSubscription(client);
ethLogsTokenTransfer.GetSubscriptionDataResponsesAsObservable().Subscribe(log =>
{
try
{
var decoded = Event <TransferEventDTO> .DecodeEvent(log);
if (decoded != null)
{
Console.WriteLine("Contract address: " + log.Address + " Log Transfer from:" + decoded.Event.From);
}
else
{
Console.WriteLine("Found not standard transfer log");
}
}
catch (Exception ex) {
Console.WriteLine("Log Address: " + log.Address + " is not a standard transfer log:", ex.Message);
}
});
client.Start().Wait();
blockHeaderSubscription.SubscribeAsync().Wait();
blockHeaderSubscription2.SubscribeAsync().Wait();
pendingTransactionsSubscription.SubscribeAsync().Wait();
ethGetBalance.SendRequestAsync("0x742d35cc6634c0532925a3b844bc454e4438f44e", BlockParameter.CreateLatest()).Wait();
ethBlockNumber.SendRequestAsync().Wait();
ethLogs.SubscribeAsync().Wait();
ethLogsTokenTransfer.SubscribeAsync(filterTransfers).Wait();
Thread.Sleep(30000);
pendingTransactionsSubscription.UnsubscribeAsync().Wait();
Thread.Sleep(20000);
blockHeaderSubscription.UnsubscribeAsync().Wait();
Thread.Sleep(20000);
}
