nmoschkin / kucoin.net Goto Github PK

If I have just one coin or fifty coins the Console app crashes within 2-10 minutes.

Running the Console published or in debug mode consistently surfaces Null Reference Exceptions.

==== some text deleted.

• A Credential problem related to the other issue posted?

• Pilot error?

• API Key permissions problem? The API Key used is limited to "General" read-only permissions. Trade and Withdrawal are not enabled.

Thanks!
James

================ 02-10-21022 Update:

-Trying to solve a bug is a great way to learn a bit of code

-It appears that despite the Credential Tool error message the API key was saved and is working successfully

Regarding the Null Reference Exception that appear after running the console for 2 - 10 mins:

• I am using either the default 10 or more commonly using just 3-4 symbols so I am testing with a lighter load than implied default of 10 symbols.

• I am commonly seeing Null Reference Exceptions at these line numbers in the Console project's program.cs: 1124, 1128, 1190, 1246 and 1327. See doc image and txt file attached below.

• I added an image of the KuCoinNet Console after freezing upon a Null Ref Exception while running just three symbols.

• In all cases the first NullRefException is thrown at Console program.cs line # 1124 or 1128
  1124 lock (a.Level3OrderBook.LockObject) >> NullReferenceException
  1128 lock (b.Level3OrderBook.LockObject) >> NullReferenceException

The image below shows that a.Level3OrderBook is NULL as the cause of the exception.

This image shows that in sortobs[1] (BTC) the Level3OrderBook value was NULL so is no surprise a.Level3OrderBook.LockObject was found to be NULL.

• The other common List sortobs dependent NREx program.cs line numbers are visible in the attached image and RTF file.

Root Cause? Possible Fixes?

• The current question is why is Observers item.Level3OrderBook frequently null and can that be fixed.

• If consistent inclusion of tem.Level3OrderBook can not be fixed then the question turns to what do we do to find a reliable resolution.

• What I tried so far: In Line# 1118 I added a null reference check item.Level3OrderBook as a condition for inclusion in the sortobs list but the did not work out well.

Your thoughts on the assessment and do you have a recommendation for a fix?

Thanks!

James

KuCoinNET Sample Console Program-NULL-EXCEPTIONS-.txt

==== UPDATE: Feb 12th 2022

I spent a few minutes on this again today. All of the Null Ref Exception trouble I have seen is related to the intermittent null value for Level3Orderbook within Observers and sortobs entries.

Still not sure if this is:

1. A Websock feed input quality issue from the Kucoin side
2. An artifact that occurs when exchange transaction volume for a token gets very light
3. A bug in the logic loading Observers and/or the logic loading sortobs.

Any insight?

James

Very nice work on this app! Thank you for letting us have a look.

I compile with Visual Studio 2022, an Intel x64 six core processor and a Windows 10 machine reasonably well updated.

I have tried a number of different compile options, normal and elevated user permissions, the NET6 and NET Framework editions, published compiles independent of Visual Studio and running in debug mode within Visual Studio

I tried entering the KuCoin API secret both with and without the hyphens.

In all cases after loading or editing in the "KuCoin API Credentials" form and clicking the "Save" button I see an error message popup that reads "Error: The Request is not supported : "C:\User... \AppData\Roaming\KuCoin.NET\48....DA.2

This passphrase has one special character, an " ! " - an exclamation point.

When I use the pin to re-open the Credentials app the credentials appear on the screen as if they have been saved correctly.

Is this a bug .. or what can I do to put this error messaging to bed.

Thanks!
James

When running the console application

market = KuCoin.Market; is null

KucoinBaseRestApi line 531 is not going to line 532, it's just returning to the program.cs