Need help implementing ActivityPub - getting inconsistent results across platforms - Madiator2011 Lemmy

My friend is working on adding ActivityPub support to his blog platform (BDServer) so people can follow/comment from Mastodon, Lemmy, etc. Current status: Lemmy and Misskey can find and follow his account (@[email protected] [/u/[email protected]]), but Mastodon can’t find it at all, even though he sees proper ActivityPub requests hitting his server. The technical details are pretty gnarly - RSA signature verification, HTTP header recreation, multi-threading issues. He wrote up the full journey here: Please Help Me With Activity Pub [https://blenderdumbass.org/articles/please_help_me_with_activity_pub] If anyone has ActivityPub experience or wants to take a look at the code (Python), we have a Matrix room for BDServer development. Any insights on why different platforms behave differently would be super helpful. https://matrix.to/#/#bdserver:tchncs.de [https://matrix.to/#/#bdserver:tchncs.de] Source code: ActivityPub.py [https://codeberg.org/blenderdumbass/BDServer/src/branch/main/modules/ActivityPub.py]