Console app for Telegram bot fails after deployment

Other Questions Telegram bot
1

I’m having trouble with my Telegram bot. It works fine in Visual Studio’s debug mode but fails when I publish it as a console app.

Here’s what happens:

  1. In debug mode, I can enter all the needed info (api_id, api_hash, phone number, verification code) and log in without issues.

  2. But when I run the published version, it always gives a FLOOD_WAIT_X error right after I type in the phone number. It’s like the app can’t handle getting the verification code from Telegram.

I’ve tried:

  • Slowing down API calls
  • Changing how I log stuff
  • Using environment variables
  • Putting the app on railway.app
  • Messing with publish settings
  • Trying to catch the error

Nothing helps. It always breaks at the same spot - when Telegram should send the verification code.

Here’s a simplified version of the problematic code:

try
{
    var client = new TelegramClient(apiId, apiHash);
    await client.ConnectAsync();
    var result = await client.LoginUserIfNeeded();
    if (result is UserPasswordNeededException)
    {
        // Handle password request
    }
}
catch (FloodException ex)
{
    Console.WriteLine($"Too many requests: {ex.Message}");
}

Any ideas why this only happens in the published version?

2

have u tried using a different telegram client library? sometmes switching to a more robust one like TDLib can help with these kinda issues in production. it handles rate limiting better

also, maybe add some delay between requests or implement exponential backoff for retries. that could help avoid triggering flood protection

3

Having dealt with similar Telegram bot issues, I can offer some insights. The FLOOD_WAIT_X error often occurs due to stricter rate limiting on production IPs. Your server’s IP is likely unfamiliar to Telegram, triggering protective measures.

Consider implementing a more sophisticated retry mechanism with exponential backoff. This approach gradually increases wait times between attempts, reducing the chance of hitting rate limits.

Another effective strategy is using a Telegram client library specifically designed to handle these scenarios. Libraries like TDLib or WTelegramClient often have built-in rate limiting and retry logic, which can significantly improve reliability in production environments.

Lastly, ensure your server’s clock is accurately synchronized. Time discrepancies can sometimes lead to unexpected authentication issues with Telegram’s API. A small adjustment here could potentially resolve your problem.

4

I’ve encountered similar issues with Telegram bots in production environments. From my experience, the FLOOD_WAIT_X error often stems from IP-based rate limiting on Telegram’s side.

When you deploy your app, it’s likely running from a different IP than your local machine. Telegram might be more strict with unfamiliar IPs, especially if multiple bots or apps are running from the same server.

One approach that worked for me was implementing a more robust retry mechanism with exponential backoff. Instead of immediately retrying after an error, I gradually increased the wait time between attempts.

Another effective strategy was to use a dedicated Telegram client library that handles rate limiting internally. I switched to TDLib (Telegram Database Library) and found it much more reliable in handling these edge cases, especially in production environments.

Lastly, ensure your server’s time is correctly synchronized. I once spent days debugging a similar issue only to realize the server’s clock was off, causing authentication problems with Telegram’s API.