According to relnotes, F42 was dropped, not F43, which is missing from rpm repos, while still supported by Fedora. Multiple other repo dirs on http://archive.trinitydesktop.net/trinity/rpm/ lead to 404 errors as well.
The abbreviated openSUSE dirs there and on the wiki's installation instruction page seem peculiarly named. ostw (Tumbleweed) and osl160 (Leap) or os160 (also Leap) I can grok, but not with the second "s"es found there.