Mitmproxy is a totally awesome tool to investigate http- and https-traffic and thus is a very useful debugging tool.
I built a package for mitmproxy some time ago, it resides in OBS project devel:languages:python called python-mitmproxy. This needs some love: It fails to work nowadays because its dependencies moved on, and requires an update. I am also sure there could be a better home repository for it.
This project is one of its kind!