Connecting QBitNinja with Litecoin

[TJvrDev]

I've successfully setup QBitNinja using Bitcoin Core. I am having trouble configuring with litecoin. The readme just specifies with Bitcoin Core. Is it safe to assume that i'll need to install litecoin core to use the altcoin capabilities with Litecoin? Would that also mean that if I used an altcoin that I would need to use a different component than Bitcoin Core?

[NicolasDorier]

If you want Litecoin, you need Litecoin node software; not bitcon core. Chain should be LTC, the rest should be the same. (I have not tried it though, so let me know how it goes)

[TJvrDev]

I have Litecoin Core [testnet] running in Azure alongside QBitNinja.Listener, but my problem in my app is using clientQBitNinja.GetBalance. The Operations.Count always return 0. The pub key it's using has 10 test coins there and its using that pub key to get the balance. but without this operations count, i'm unable to see the unspentCoins and effectively get the balance.

QBitNinja.Listener will give this output:

QBitNinja.Listener Information: 0 : Start initial indexing
QBitNinja.Listener Information: 0 : Handshaking...
QBitNinja.Listener Information: 0 : Handshaked
QBitNinja.Listener Information: 0 : Current chain at height 864241
QBitNinja.Listener Information: 0 : Dequeuing index jobs
Work remaining in the queue : 0
QBitNinja.Listener Information: 0 : Work finished, updating checkpoints
QBitNinja.Listener Information: 0 : default/balances...
QBitNinja.Listener Information: 0 : default/blocks...
QBitNinja.Listener Information: 0 : default/transactions...
QBitNinja.Listener Information: 0 : default/wallets...
QBitNinja.Listener Information: 0 : default/subscriptions...
QBitNinja.Listener Information: 0 : Checkpoints updated
QBitNinja.Listener Information: 0 : Initial indexing terminated

If it says initial indexing terminated, will QBitNinja continue to work?

[NicolasDorier]

Please read the doc, after indexing you need: "QBitNinja.Listener.Console.exe --Listen"

[NicolasDorier]

how do you instanciate clientQBitNinja ?

[TJvrDev]

QBitNinjaClient clientQBitNinja = new QBitNinjaClient(NetworkAPI, m_network);

The NetworkAPI is assigned "http://tapi.qbit.ninja/"
& m_network is assigned NBitcoin.Altcoins.Litecoin.Instance.Testnet

After going back through the readme I was able to get the Listener.Console.exe up and running.
The problem i'm finding is not being able to find operations in the BalanceModel.

[NicolasDorier]

http://tapi.qbit.ninja/ only support BTC you need your to host your own server.

[NicolasDorier]

Follow https://github.com/MetacoSA/QBitNinja#setup-the-front

[TJvrDev]

Ah, ok i've updated the test network to the web address I use for my azure web application. Now when it runs the task to retrieve the balance, there is a bit of a wait. Then it returns this error:

TaskCanceledException: A task was canceled.
Rethrow as AggregateException: One or more errors occurred.
System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) (at :0)
System.Threading.Tasks.Task1[TResult].GetResultCore (System.Boolean waitCompletionNotification) (at <e1a80661d61443feb3dbdaac88eeb776>:0) System.Threading.Tasks.Task1[TResult].get_Result () (at :0)
YourBitcoinController.BitCoinController.GetUnspentCoins (NBitcoin.BitcoinAddress _address, System.Boolean _dispatchEvent) (at Assets/YourBitcoinController/Core/Scripts/Controller/BitCoinController.cs:866)
YourBitcoinController.BitCoinController.GetBalance (System.String _privateKey, System.Boolean _dispatchEvent) (at Assets/YourBitcoinController/Core/Scripts/Controller/BitCoinController.cs:835)
YourBitcoinController.BasicManager.CheckBalanceOriginReal () (at Assets/YourBitcoinController/Core/Scripts/View/BasicManager.cs:297)

I'm testing on Esteban's Unity package for bitcoin for testing then ill make the changes in my app.

Do you think the task is just timing out?
I am using a single instance of QBitNinja.Listener.Console without the optional RPCConnectionString.

[TJvrDev]

I'm having trouble binding RPC at my address. I'm also looking into the possibility that by default my VM on Azure may be blocking RPC communication from the default networking settings.

Did you have to set up an inbound port rule to allow access to the connection?

If that isnt the problem then it may be how I have litecoin.conf set up.
Is there anything you would recommend changing in this?

I do get a message in the debug log:
Binding RPC on address 127.0.0.1 port 19335 failed.

//##
//## litecoin.conf configuration file. Lines beginning with # are comments.
//##

//# IMPORTANT: do not use the daemon's wallet
disablewallet=1

datadir=/ltc

//# Network-related settings:

//# Run on the test network instead of the real lite network.
testnet=1

//# Listening mode, enabled by default except when 'connect' is being used. Port 19335 (TestNet4)
listen=1

//#
//# JSON-RPC options (for controlling a running Litecoin/litecoind process)
//#

//# server=1 tells litecoind to accept JSON-RPC commands
server=1
//# Accept public REST requests (default: 0)
rest=0
//# RPC username or password is not specified, so a cookie is written to the /ltc/testnet4 directory for the CLI to use for auth

[NicolasDorier]

The timeout has nothing to do with this. The front does not connect to RPC. I don't really know how to troubleshoot this. If you can manage to get azure logs for the front it would be good.

[TJvrDev]

It's strange but when I enabled "Application Logging" for the webapp in Azure, it started working. Even after disabling "Application Logging". My app goes through the flow and I get a Transaction Success result from

BroadcastResponse broadcastResponse = _clientQBitNinja.Broadcast(_customerTransaction).Result;

But the wallets and testnet do not reflect the transaction.
I did retrieve the web server logs from Azure, ill email them to you.

[NicolasDorier]

please do not email, just copy paste here. What is your server url?

[TJvrDev]

https://alarisbattles.azurewebsites.net

[NicolasDorier]

OK, let's try to solve it, can you try to run the front under visual studio with the same config as the website?

[TJvrDev]

I started running QBitNinja in Visual Studio with the same config as the website.

[NicolasDorier]

Any exception or anything you can notice? You have the same timeout?

[TJvrDev]

When reviewing the logs there were a few exceptions, this was one of them:

System.TimeoutException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089The client could not finish the operation within specified timeout. at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at NBitcoin.Indexer.IndexerClient.<GetChainChangesUntilFork>d__22.MoveNext()
at NBitcoin.Indexer.ChainChangeEntryExtensions.UpdateChain(IEnumerable`1 entries, ChainBase chain)
at QBitNinja.QBitNinjaDependencyResolver.UpdateChain()
at QBitNinja.UpdateChainListener.<Listen>b__10_0(Object _)
at System.Threading.TimerQueueTimer.CallCallbackInContext(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.TimerQueueTimer.CallCallback()
at System.Threading.TimerQueueTimer.Fire()
at System.Threading.TimerQueue.FireQueuedTimerCompletion(Object state)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
System.TimeoutException: The client could not finish the operation within specified timeout.

[NicolasDorier]

I should be able to fix that, can you send me your account storage creds by mail?

[TJvrDev]

Sent

[NicolasDorier]

@TJvrDev can you verify that your storage account and your front website reside in the same datacenter ? (region)

[TJvrDev]

It looks like the storage account resides in East US & West US. The website resides in Central. Ill get them in the same region.

[TJvrDev]

Alright I have Web App residing in East US now. I did have to create a new web app but I applied to updated PublishSettings for QBitNinja and republished it.

[TJvrDev]

The new server url is:
http://alarisbattlesapp.azurewebsites.net/

[NicolasDorier]

storage account resides in East US & West US a storage account can't live in two different place.
It does not seem to have resolved the issue.

I will try something.

[NicolasDorier]

Actually it solved, it. It is not timing out now.

[NicolasDorier]

It is quite slow though... Querying on an address take a while.

[NicolasDorier]

Actually timing out. It does not make sense. What is your machine specification for the front? I am wondering if the server does not get restarted because it uses too much memory or something like this. One sec, I check on my servers.

[NicolasDorier]

Ok so this is my tier for the service plan Basic: 1 Large

[TJvrDev]

My service plan for the web app shows Standard: 1 small. I'll try to change it to match yours.

[TJvrDev]

Before it had:
100 total ACU
1.75 GB memory

Now has:
400 total ACU
7GB memory

[NicolasDorier]

It is still timing out it seems. That is super strange. Trying to replicate it as much as I can.

[NicolasDorier]

Can you get the applications logs on your server at all? Is it still this timeout?