abci | DEPRECATED Merged into https | Blockchain library

[@artur's] comment got me thinking and I have finally figured it out. Actually, even before I posted this question, my first thought was that this should indeed be http, despite the documentation saying otherwise, but no, http://127.0.0.1:5020 wouldn't work. So I tried to put it in .toml file instead, I have even tried with https, but also without luck. Trying with http didn't throw any errors, unlike in the case when address was preceeded with tcp, it was just hanging on Waiting for Echo message (similarly to when pointing to the wrong address, which was weird). I've been always, eventually reverting to the tcp version. The solution was simple, remove protocol altogether...

The documentation doesn't give any clues, so for completion, at least when working with C# (.NET 5), there are 3 things that you HAVE TO DO to make it work, all of them are trivial but you have to figure them out by yourself first:

1. Remove protocol from your configuration when pointing to the proxy app: tcp://127.0.0.1: should be 127.0.0.1: and YES, it will throw regardless if you have protocol specified in the .toml file or as a flag in the console.
2. The flag is --proxy_app NOT --proxy-app.
3. Additionally to following the tutorial, you also have to EXPLICITLY override and implement Info(), Echo() and InitChain(), otherwise it will throw an Unimplemented Exception.

Since my understanding of Tendermint is still scarce, the initial approach had some design issues. Here is the code for anybody facing similar problems:

https://github.com/rvnlord/TendermintAbciGrpcCSharp